JP3336752B2 - Method and apparatus for generating CTL signal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for generating a CTL signal suitable for use in a VTR or the like which does not have hardware for generating a CTL signal and recording it on a magnetic tape.

[0002]

2. Description of the Related Art Conventionally, a tape width is 1/2 inch and 3/4.
In editing using a VTR such as an inch or an inch, when recording a video signal, a CTL for a tracking servo recorded on a control track on a tape by a dedicated head is used.
The signal (control pulse signal) is reproduced, and the reproduced C
The present position on the tape is detected by counting the pulses of the TL signal, and processing such as phase adjustment is performed based on the detected position information.

On the other hand, a VTR having a tape width of 8 mm
Does not employ the tracking servo using the CTL signal as described above,
A method called F (automatic track finding) is employed. Therefore, at the time of editing, the following three methods are employed to detect the tape position.

The first method is to count the number of valleys or peaks in the envelope of a reproduced video signal (RF signal) from a reproducing head.

However, in the first method, if the envelope of the reproduced video signal cannot be obtained due to lack of the reproduced video signal (dropout) or the like, the count obtained by counting the number of valleys or peaks of the envelope is obtained. The value becomes inaccurate, which causes a problem that accurate tape position information cannot be obtained.

[0006] A second method is to use a PCM on a magnetic tape that is set in the 8 mm video tape format.
P as the user area in the audio data area
In this method, a time code is recorded as tape position information in a CMID area or a coding index area, and the time code is read during reproduction, and tape position information is obtained from the read time code.

However, this second method requires a time code generating circuit and a time code reading circuit separately, so that in addition to the cost problem that the cost of the apparatus rises, the second method requires a variable speed such as search. At the time of reproduction, the head does not accurately scan the track on which the PCM signal is recorded on the magnetic tape (for example, scans two tracks diagonally). This causes a problem that an accurate tape position cannot be detected.

[0008] A third method is to detect a capstan rotation speed detection signal obtained by detecting a rotation speed of a capstan motor,
There is a method of dividing the reel rotation speed detection signal obtained by detecting the rotation speed of the reel motor, counting the frequency-divided signal obtained by frequency division, and detecting the tape position based on the count value.

However, in the third method, since the tape position is not detected on the basis of the video signal recorded on the magnetic tape, a slip occurs between the capstan and the magnetic tape, aging, or If the magnetic tape expands or contracts due to temperature changes,
The phase of the reproduced video signal and the phase of the divided signal of the capstan rotation speed detection signal, or the phase of the reproduced video signal and the phase of the divided signal of the reel rotation speed detection signal are shifted,
As a result, there is a problem that an accurate tape position cannot be detected.

Accordingly, the applicant of the present invention has proposed a tape speed information obtained from the RF output signal and the switching pulse signal and a phase information of the RF output signal and the switching pulse signal based on the phase information of the capstan rotation speed dividing pulse. Has been proposed (see Japanese Patent Application Laid-Open No. 2-292770) in which a pseudo CTL signal indicating the exact position of the tape is formed.

According to this, even in a VTR having a format in which the CTL signal is not recorded on the tape, the tape speed information obtained from the RF output signal and the switching pulse signal and the phase information between the RF output signal and the switching pulse signal are used. By correcting the phase of the capstan rotation speed frequency dividing pulse and forming a pseudo CTL signal indicating the exact position of the tape, accurate tape positioning is possible during editing, and advanced tape editing is realized. can do.

[0012]

In an editing process using a VTR having a tape width of 1/2 inch, 3/4 inch, 1 inch, etc., reproduction is performed so that a screen is played, and a magnetic tape is moved to a desired position. , Which is a so-called linear search, or a fine adjustment of the speed for adjusting the tape position of the reproduction-side VTR to the tape position of the recording-side VTR (for example, 0.
8 or 1.1 times speed).

On the other hand, when the above-described 8 mm video tape format VTR is used for editing, as described above, the 8 mm video tape format VT is used.
When R is used for editing, it is not possible to perform the linear search or the phase adjustment for finely adjusting the speed such as 0.8 or 1.1. However, the above-mentioned 8 mm video tape format VTRs are also frequently used in editing work, and there is a demand for the linear search and the realization of 0.8 or 1.1 times speed phasing during editing. Have been.

In a VTR in which the above-mentioned pseudo CTL signal is formed, while shifting from a certain speed to a certain speed,
That is, in a state where no reproduction is performed, a pseudo CTL pulse is generated in a state where there is no RF output signal. As a result, a so-called free-run state is obtained in that period, so that accurate tape position information can be obtained. However, improvement is also required in this regard.

Generally, since the capstan FG corresponds to the length direction of the magnetic tape, the other VTRs
In order to obtain compatibility with the magnetic tape recorded in step (1), an error of ± 1 pulse, ie, ± 1/150, is provided for the capstan FG150 pulse. Therefore, when the pseudo CTL signal as described above is generated and tracking is performed based on the pseudo CTL signal,
If a VTR different from the VTR used for recording is used for reproduction, there is a high possibility that the above-mentioned free-run state will occur, and improvement of this is also required.

In the generation of the pseudo CTL signal, the phase of the capstan rotational speed frequency dividing pulse is corrected based on the tape speed information obtained from the RF signal and the switching pulse signal and the phase information between the RF signal and the switching pulse signal. Although a high-precision pseudo-CTL signal is obtained by forming a pseudo-CTL signal indicating an accurate position of the tape, since the RF signal is used, for example, a temperature change or a secular change of the magnetic tape is performed. In some cases, the RF signal level cannot be obtained correctly due to the so-called head contact when the head enters the magnetic tape, the linearity of the track formed on the magnetic tape, guard band conditions, etc. Yes, in that case, pseudo CT
Since the accuracy of the L signal is low, the accuracy of the tape position information or track position information obtained based on the pseudo CTL signal obtained at this time is low.

The present invention has been made in consideration of the above points, and can cope with linear search and phase adjustment often performed at the time of editing, can prevent a free-run state even during a speed change period, and can perform recording. The present invention proposes a CTL signal generation method and a CTL signal generation apparatus which can reproduce data well using a VTR different from that described above, and can obtain more accurate position information, that is, can obtain a highly accurate pseudo CTL signal. It is.

[0018]

According to a first aspect of the present invention, a recording signal recorded with a tracking signal superimposed thereon so as to form an inclined track on a magnetic tape is mounted on a rotary drum. A plurality of magnetic heads 26, 27
Scan while switching with drum switching pulse,
C used in a reproducing apparatus for reproducing a recording signal
A TL signal generation method, comprising: measuring a time from detecting an edge of a drum switching pulse to detecting track number data in a recording signal; comparing the measured time with a reference time; When the reference time matches, the level of the tracking signal recorded together with the recording signal is compared with an allowable level, and the level of the tracking signal is within the allowable level. Is detected, the recording track is counted from the value indicated by the track number data extracted from the recording signal, and every time the count value reaches a predetermined value, the recording track goes from high level to low level or from low level to high level. This is a CTL signal generation method for generating a CTL signal.

According to a second aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on the magnetic tape 28 so as to form an inclined track. 27. A CTL signal generating method used in a reproducing apparatus which scans the recording signal 27 while switching it with a drum switching pulse and reproduces a recording signal, wherein a track number in the recording signal after detecting one edge of the drum switching pulse The time until data is detected is measured, and the measured time is compared with a reference time.
It is detected whether or not the polarity indicates that it is a scanning period by the predetermined head 26 or 27 out of 6 and 27. By comparison, the predetermined time recorded together with the recording signal when the measured time matches the reference time is detected. The level of the tracking signal extracted from the adjacent track of the recording track to be scanned by the head 26 or 27 is within the allowable level, and the level of the tracking signal is within the allowable level. Is detected from the value indicated by the track number data extracted from the recording signal,
The C is configured to count recording tracks and generate a CTL signal that changes from a high level to a low level or from a low level to a high level every time the count value reaches a predetermined value.
This is a TL signal generation method.

According to a third aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on the magnetic tape 28 so as to form an inclined track. 27. A CTL signal generating method used in a reproducing apparatus that scans the recording signal 27 while switching it with a drum switching pulse and reproduces a recording signal, wherein a track number in the recording signal is detected after one edge of the drum switching pulse is detected. The time until data is detected is measured, and the measured time is compared with a reference time.
The polarity indicating the scanning period by which head 26 or 27 out of 6 and 27 is detected. If the measured time and the reference time match, detection is performed based on the polarity of the drum switching pulse. A predetermined head 26 or 27 compares the level of a tracking signal recorded from a track adjacent to a recording track to be scanned by the predetermined head with a recording signal, and determines whether or not the level is within an allowable level. When it detects that the level of the tracking signal is within the acceptable level,
The recording tracks are counted from the value indicated by the track number data extracted from the recording signal, and each time the count value reaches a predetermined value, a CTL signal from a high level to a low level or from a low level to a high level is generated. This is the CTL signal generation method described above.

According to a fourth aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on the magnetic tape 28 so as to form an inclined track. A CTL signal generating device used in a reproducing device that scans 27 while switching with a drum switching pulse and reproduces a recording signal, and detects the edge of the drum switching pulse and then converts the track number data in the recording signal. Reference time comparison means 1 for measuring a time until detection and comparing the measured time with a reference time, and a tracking signal recorded together with a recording signal when the measured time and the reference time match by comparison. Level comparing means 5 for comparing whether or not the level of the signal is within the range of the allowable level; When the count value is within the range, the number of recording tracks is counted from the value indicated by the track number data extracted from the recording signal, and every time the count value reaches a predetermined value, the level is changed from high level to low level, or C that generates a CTL signal that goes from low to high
This is a CTL signal generation device having TL signal generation means 6.

According to a fifth aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on a magnetic tape 28 so as to form an inclined track. A CTL signal generator used in a reproducing apparatus that scans the recording signal 27 while switching it with a drum switching pulse and reproduces a recording signal, and detects the edge of the drum switching pulse and then converts the track number data in the recording signal. Reference time comparison means 1 (29, 31, 32, 33) for measuring a time until detection and comparing the measured time with a reference time, and a recording signal when the measured time and the reference time match by comparison. Level comparing means 5 (31) for comparing whether or not the level of the tracking signal recorded together with the level is within the range of the allowable level; Capstan frequency signal generating means 35 for generating a capstan frequency signal corresponding to the rotation of the pusher motor 34, and counting the capstan frequency signal from the capstan frequency signal generating means 35 to generate a track detection signal corresponding to the recording track. Track detecting means 6 (37) for outputting, and track detecting means 6
CTL signal generating means 6 (38) for generating a CTL signal based on the track detection signal from (37), and when it is detected that the level of the tracking signal is within an allowable level, The CTL signal generating device includes a control means 7 (31) for presetting track number data extracted from a recording signal to a CTL signal generating means 6 (38).

According to a sixth aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on the magnetic tape 28 so as to form an inclined track. 27. A CTL signal generating method used in a reproducing apparatus that scans the recording signal 27 while switching it with a drum switching pulse and reproduces a recording signal, wherein a track number in the recording signal is detected after one edge of the drum switching pulse is detected. Reference time comparison means 1 (29, 31, 32, 33) for measuring a time until data is detected and comparing the measured time with a reference time.
And a plurality of heads 2 having a plurality of drum switching pulses
Polarity detecting means 3 (31, 32, 33) for detecting whether or not the polarity indicates a scanning period by a predetermined head 26 or 27 out of 6 and 27, and extracting means 4 for extracting a tracking signal. (30) and the polarity detection means 3 (3
1, 32, and 33), the extraction means 4 (from the adjacent track of the recording track to be scanned by the predetermined head 26 or 27 which is recorded together with the recording signal when the measurement time and the reference time coincide with each other). Level comparing means 5 (31) for comparing whether or not the level of the tracking signal extracted by 30) is within the range of an allowable level;
A capstan frequency signal generating means 35 for generating a capstan frequency signal corresponding to the rotation of the capstan motor 34, and a capstan frequency signal generating means 35
And a CTL signal generating means 38 for generating a CTL signal based on the track detection signal from the track detecting means 37. When the level comparing means 5 (31) detects that the level of the tracking signal is within the allowable range, the track number data extracted from the recording signal is preset in the CTL signal generating means 38. A CTL signal generation device having a control unit 5 (31) for performing CTL signal generation.

According to a seventh aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on the magnetic tape 28 to form an inclined track. 27. A CTL signal generating method used in a reproducing apparatus that scans the recording signal 27 while switching it with a drum switching pulse and reproduces a recording signal, wherein a track number in the recording signal is detected after one edge of the drum switching pulse is detected. Reference time comparison means 1 (29, 31, 32, 33) for measuring a time until data is detected and comparing the measured time with a reference time.
And a plurality of heads 2 having a plurality of drum switching pulses
Polarity detecting means 3 (31, 32, 33) for detecting whether or not the polarity indicates a scanning period by a predetermined head 26 or 27 out of 6 and 27, and extracting means 4 for extracting a tracking signal. (30, 31) and polarity detection means 3
According to the comparison in (31, 32, 33), when the measured time and the reference time coincide, the predetermined head 26 or 27 detected based on the polarity of the drum switching pulse is recorded together with the recording signal, and is recorded. Level comparing means 5 (31) for comparing whether or not the level of the tracking signal extracted by the extracting means 4 (30, 31) from the track adjacent to the recording track to be scanned by 26 or 27 is within an allowable level. ), A capstan frequency signal generating means 35 for generating a capstan frequency signal corresponding to the rotation of the capstan motor 34, and counting the capstan frequency signal from the capstan frequency signal generating means 35 to correspond to the recording track. Track detection means 37 for outputting a track detection signal
CTL signal generating means 38 for generating a CTL signal based on the track detection signal from the track detecting means 37, and the level of the tracking signal in the level comparing means 5 (31) is within an allowable level. And a control means 7 (31) for presetting the track number data extracted from the recording signal to the CTL signal generating means 38 when the CTL is detected.

According to an eighth aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotary drum 25 transfer a recording signal recorded with a tracking signal superimposed on a magnetic tape 28 so as to form an inclined track. 27. A CTL signal generation method used in a reproducing apparatus which scans the recording signal 27 while switching it with a drum switching pulse and reproduces the recording signal, wherein a track in the recording signal is detected after detecting an edge of the drum switching pulse The time until the number data is detected is measured, and the measured time is compared with a reference time. By the comparison, when the measurement time matches the reference time, the tracking time recorded together with the recording signal. The level of the signal for tracking is compared with the level of the tracking signal. Is detected, the plurality of magnetic heads scans the magnetic tape once each based on the track number data extracted from the recording signal. Obtain new group number data indicating a group, count the groups from the value indicated by the group number data,
Each time the count value reaches a predetermined value, the CT changes from a high level to a low level or from a low level to a high level.
This is a CTL signal generation method for generating an L signal.

According to a ninth aspect of the present invention, a plurality of magnetic heads mounted on a rotary drum 25 are used for drum switching by using a plurality of magnetic heads mounted on a rotating drum 25 for recording a recording signal recorded with a tracking signal superimposed on the magnetic tape to form an inclined track. A CTL signal generation method used in a reproducing apparatus that scans while switching with a pulse and reproduces the recording signal,
The time from the detection of one edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is compared with a reference time. And detecting whether or not the polarity indicates that it is a scanning period by a predetermined head among the heads, and comparing the measurement time with the recording signal when the reference time coincides with the recording signal. The level of the tracking signal extracted from a track adjacent to the recording track to be scanned by the predetermined head is compared with an allowable level, and the level of the tracking signal is within the allowable level. When the plurality of magnetic heads are detected based on the track number data extracted from the recording signal, New group number data indicating a group of all tracks formed when the magnetic tape is scanned once each time is obtained, the group is counted from the value indicated by the group number data, and the count value is a predetermined value. This is a CTL signal generation method in which a CTL signal is changed from a high level to a low level or from a low level to a high level every time the following condition is satisfied.

According to a tenth aspect of the present invention, a plurality of magnetic heads mounted on a rotary drum 25 are used for drum switching by using a plurality of magnetic heads mounted on a rotating drum 25 for recording signals recorded on a magnetic tape in such a manner that tracking signals are superimposed to form inclined tracks. A method for generating a CTL signal used in a reproducing apparatus that scans while switching with a pulse and reproduces the recording signal, wherein a track number data in the recording signal is detected after one edge of the drum switching pulse is detected. Measuring the time until detecting, comparing the measured time with a reference time, detecting whether the polarity of the drum switching pulse is a polarity indicating which of the plurality of heads is a scanning period by a head, By the above comparison, the above measurement time,
When the reference time matches, by a predetermined head detected based on the polarity of the drum switching pulse,
The level of the tracking signal recorded from the track adjacent to the recording track to be scanned by the predetermined head is recorded together with the recording signal, and is compared with an allowable level. When the plurality of magnetic heads scan the magnetic tape once each based on the track number data extracted from the recording signal when detecting that the level is within the range of the allowable level. New group number data indicating the group of all tracks to be recorded, and counting the group from the value indicated by the group number data,
Each time the count value reaches a predetermined value, the CT changes from a high level to a low level or from a low level to a high level.
This is a CTL signal generation method for generating an L signal.

According to an eleventh aspect of the present invention, a plurality of magnetic heads mounted on a rotary drum 25 are used for drum switching by using a plurality of magnetic heads mounted on a rotary drum 25 for recording signals recorded on a magnetic tape in such a manner that tracking signals are superimposed to form inclined tracks. What is claimed is: 1. A CTL signal generating device used in a reproducing device that scans while switching with a pulse and reproduces the recording signal, wherein a track number data in the recording signal is detected after detecting an edge of the drum switching pulse. A reference time comparing means 1 (31) for measuring a time until the measured time and comparing the measured time with a reference time, and, when the measured time and the reference time coincide with each other, are recorded together with the recording signal. Level comparing means 5 (31) for comparing whether or not the level of the tracking signal is within an allowable level range; When detecting that the level of the tracking signal is within the range of the permissible level, the plurality of magnetic heads 26 and 27 are each operated once based on the track number data extracted from the recording signal. New group number data indicating a group of all tracks formed when the magnetic tape 28 is scanned is obtained, the group is counted from the value indicated by the group number data, and each time the count value reaches a predetermined value. To
C including CTL signal generation means 6, 7, 8, 100 (31, 37, 38) for generating a CTL signal from high level to low level or from low level to high level
It is a TL signal generation device.

According to a twelfth aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on a magnetic tape 28 so as to form an inclined track. 27. A CTL signal generating device used in a reproducing apparatus which scans the recording signal 27 while switching it with a drum switching pulse and reproduces the recording signal. Reference time comparison means 1 (31) for measuring the time until the number data is detected, and comparing the measured time with the reference time, and the recording when the measured time matches the reference time by the comparison. Level comparing means for comparing whether or not the level of the tracking signal recorded together with the signal is within an allowable level range And (31), the capstan motor 3
And a capstan frequency signal generating means 32, 33 for generating a capstan frequency signal corresponding to the rotation of the motor 4, and counting the capstan frequency signals from the capstan frequency signal generating means 32, 33 to obtain the plurality of magnetic heads 26. , 27 each output a group detection signal corresponding to a group of all tracks formed when the magnetic tape 28 is scanned once each, and counts the group detection signals from the group detection means 37. The plurality of magnetic heads 26 and 27 are each operated once by the counting means 6 (38) and the track number data extracted from the recording signal.
Group number obtaining means 100 (31) for obtaining new group number data indicating a group of all tracks formed when scanning is performed, and a CTL signal is generated based on the count value output from the counting means 6 (38). CTL
Signal generation means 6 (38), and when it is detected that the level of the tracking signal is within the range of the allowable level, the group number acquisition means 100 (3)
This is a CTL signal generation device having control means 7 (31) for presetting the group number data from 1) to the CTL signal generation means 6 (38).

According to a thirteenth aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotary drum 25 transfer a recording signal recorded with a tracking signal superimposed on a magnetic tape 28 so as to form an inclined track. 27. A method of generating a CTL signal used in a reproducing apparatus that scans the recording signal 27 while switching it with a drum switching pulse and reproduces the recording signal. And a reference time comparing means 1 (31) for measuring the time until the track number data is detected and comparing the measured time with a reference time, and the polarity of the drum switching pulse among the plurality of heads 26 and 27. A polarity detecting means 3 (31) for detecting whether or not the polarity indicates a scanning period by a predetermined head 26 or 27; And extraction means 4 (30) for extracting a signal for the tracking, the polarity detection means 3 (31)
When the measurement time and the reference time coincide with each other, the extraction means 4 (30) starts from a track adjacent to a recording track to be scanned by the predetermined head 26 or 27 recorded together with the recording signal. ), The level comparing means 5 (3) for comparing whether the level of the tracking signal extracted is within the range of the allowable level.
1), a capstan frequency signal generating means 32, 33 for generating a capstan frequency signal corresponding to the rotation of the capstan motor 34, and counting the capstan frequency signals from the capstan frequency signal generating means 32, 33. A group detection means 6 (37) for outputting a group detection signal corresponding to a group of all tracks formed when the plurality of magnetic heads 26 and 27 scan the magnetic tape 28 once each; Counting means 6 (38) for counting the group detection signal from the detection means 6 (37); and the plurality of magnetic heads 2 based on track number data extracted from the recording signal.
Group number obtaining means 100 for obtaining new group number data indicating groups of all tracks formed when the magnetic tapes 6 and 27 scan the magnetic tape 28 once each;
(31) and CTL signal generating means 6 (38) for generating a CTL signal based on the count value output from the counting means 6 (38), wherein the level of the tracking signal is equal to the allowable level. When it is detected that the data is within the range, the group number data from the group number acquiring means 100 (31) is transferred to the CTL signal generating means 6 (3).
8) with control means 7 (31) for presetting
It is a TL signal generation device.

According to a fourteenth aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on a magnetic tape 28 so as to form an inclined track. 27. A method of generating a CTL signal used in a reproducing apparatus that scans the recording signal 27 while switching it with a drum switching pulse and reproduces the recording signal. A reference time comparing means 1 (31) for measuring the time until the track number data is detected, and comparing the measured time with a reference time; A polarity detecting means 3 (31) for detecting whether or not the polarity indicates a scanning period by a predetermined head 26 or 27; And extraction means 4 (30) for extracting a signal for the tracking, the polarity detection means 3 (31)
When the measurement time and the reference time coincide with each other, the predetermined head 26 or 27 detected based on the polarity of the drum switching pulse is recorded together with the recording signal, and the predetermined head 26 or 2
7, level comparing means 5 (31) for comparing whether or not the level of the tracking signal extracted by the extracting means 4 (30) from the track adjacent to the recording track to be scanned is within an allowable level; Capstan frequency signal generating means 32, 33 for generating a capstan frequency signal corresponding to the rotation of the capstan motor 34;
The capstan frequency signals from the capstan frequency signal generating means 32, 33 are counted, and the plurality of magnetic heads 26, 27 scan the magnetic tape 28 once each to form a group of all tracks. Group detection means 6 for outputting a corresponding group detection signal
(37) and counting means 6 (38) for counting the group detection signal from the group detecting means 6 (37).
And a new group indicating a group of all tracks formed when the plurality of magnetic heads 26 and 27 scan the magnetic tape 28 once each based on the track number data extracted from the recording signal. CTL based on the group number obtaining means 100 (31) for obtaining the number data and the count value output from the counting means 6 (38)
CTL signal generating means 6 (38) for generating a signal, and when the level comparing means 5 (31) detects that the level of the tracking signal is within the allowable level, the recording is performed. The CTL signal generating device includes a control means 7 (31) for presetting the track number data extracted from the signal to the CTL signal generating means 6 (38).

According to a fifteenth aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on a magnetic tape 28 so as to form an inclined track. 27. A method of generating a CTL signal used in a reproducing apparatus which scans the recording signal 27 while switching it with a drum switching pulse and reproduces the recording signal, wherein after detecting an edge of the drum switching pulse, A plurality of magnetic heads each scan the magnetic tape once each to measure the time required to detect group number data indicating a group of all tracks formed, and compare the measured time with a reference time. By comparison, when the measurement time and the reference time match, the track recorded with the recording signal is recorded. The level of the tracking signal is within the range of the permissible level, and when it is detected that the level of the tracking signal is within the range of the permissible level, the value indicated by the group number data is A CT signal which counts the group and generates a CTL signal which changes from a high level to a low level or from a low level to a high level every time the count value reaches a predetermined value.
This is an L signal generation method.

According to a sixteenth aspect of the present invention, a plurality of magnetic heads mounted on a rotating drum 25 are used for drum switching by using a plurality of magnetic heads mounted on a rotating drum 25 for recording signals recorded on a magnetic tape in such a manner that tracking signals are superimposed to form inclined tracks. A CTL signal generation method used in a reproducing apparatus that scans while switching with a pulse and reproduces the recording signal, wherein a plurality of the plurality of recording signals in the recording signal are detected after one edge of the drum switching pulse is detected. When the magnetic head scans the magnetic tape once each time, it measures the time until the group number data indicating the group of all the tracks formed is detected, compares the measured time with the reference time, and performs the drum switching. It is determined whether the polarity of the pulse is a polarity indicating that it is a scanning period by a predetermined head among the plurality of heads. When the measurement time and the reference time coincide with each other, the tracking signal extracted from a track adjacent to a recording track to be scanned by the predetermined head and recorded together with the recording signal when the reference time coincides with the measurement time. Comparing whether the level is within the range of the allowable level, and when detecting that the level of the tracking signal is within the range of the allowable level, counting the group from the value indicated by the group number data A CTL signal generation method is configured to generate a CTL signal that changes from a high level to a low level or from a low level to a high level every time the count value reaches a predetermined value.

According to a seventeenth aspect of the present invention, a plurality of magnetic heads mounted on a rotating drum 25 are used for drum switching by using a plurality of magnetic heads mounted on a rotating drum 25 for drum switching by using a recording signal recorded with a tracking signal superimposed on the magnetic tape so as to form an inclined track. A CTL signal generation method used in a reproducing apparatus that scans while switching with a pulse and reproduces the recording signal, wherein a plurality of the plurality of recording signals in the recording signal are detected after one edge of the drum switching pulse is detected. When the magnetic head scans the magnetic tape once each time, it measures the time until the group number data indicating the group of all the tracks formed is detected, compares the measured time with the reference time, and performs the drum switching. Detecting whether the polarity of the pulse is a polarity indicating which of the plurality of heads is a scanning period, By serial comparison, and the measurement time,
When the reference time matches, by a predetermined head detected based on the polarity of the drum switching pulse,
The level of the tracking signal recorded from the track adjacent to the recording track to be scanned by the predetermined head is recorded together with the recording signal, and is compared with an allowable level. When it is detected that the level is within the range of the allowable level, the group is counted from the value indicated by the group number data, and each time the count value reaches a predetermined value,
This is a CTL signal generation method for generating a CTL signal from a high level to a low level or from a low level to a high level.

According to an eighteenth aspect of the present invention, a plurality of magnetic heads mounted on a rotating drum 25 are used for drum switching by using a plurality of magnetic heads mounted on a rotary drum 25 for recording signals recorded with a tracking signal superimposed on the magnetic tape so as to form an inclined track. What is claimed is: 1. A CTL signal generating apparatus used in a reproducing apparatus that scans while switching with a pulse and reproduces the recording signal, wherein the plurality of magnetic heads in the recording signal after detecting an edge of the drum switching pulse. 26, 27
The reference time comparing means 1 measures the time required to detect group number data indicating a group of all tracks formed when the magnetic tape 28 is scanned once each time, and compares the measured time with a reference time. (31) and a level for comparing whether or not the level of the tracking signal recorded together with the recording signal when the measured time and the reference time coincide with each other is within an allowable level. When the comparing means 5 (31) detects that the level of the tracking signal is within the range of the allowable level, the group is counted from the value indicated by the group number data. A CT that generates a CTL signal that changes from a high level to a low level or from a low level to a high level every time a predetermined value is reached
L signal generation means 6, 7, 8, 100 (31, 37, 3)
8).

According to a nineteenth aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on a magnetic tape 28 so as to form an inclined track. 27. A CTL signal generating device used in a reproducing device that scans 27 while switching with a drum switching pulse and reproduces the recording signal, and detects an edge of the drum switching pulse, and then detects the edge of the recording signal. The time until the plurality of magnetic heads 26 and 27 detect group number data indicating the group of all tracks formed when scanning the magnetic tape 28 once each time is measured, and the measured time is defined as a reference time. Reference time comparison means 1 (3
1) and a level comparison for comparing whether or not the level of the tracking signal recorded together with the recording signal is within an allowable level when the measured time and the reference time coincide with each other. Means 5 (31) and capstan frequency signal generating means 3 for generating a capstan frequency signal corresponding to the rotation of the capstan motor 34
2, 33 and the capstan frequency signal generating means 3
The capstan frequency signals from the magnetic heads 2 and 33 are counted, and a group detection signal corresponding to a group of all tracks formed when the magnetic heads 26 and 27 scan the magnetic tape 28 once each is output. Group detecting means 37, and counting means 6 (38) for counting group detection signals from the group detecting means 37.
And a CTL signal generating means 6 for generating a CTL signal based on the count value output from the counting means 6 (38).
(38) control means for presetting the group number data to the CTL signal generating means 6 (38) when detecting that the level of the tracking signal is within the range of the allowable level. 7 (31).

According to a twentieth aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on the magnetic tape 28 so as to form an inclined track. 27. A method of generating a CTL signal used in a reproducing apparatus that scans the recording signal 27 while switching it with a drum switching pulse and reproduces the recording signal. The plurality of magnetic heads 26 and 27 are respectively operated once by the magnetic tape 28.
Is measured until group number data indicating a group of all tracks formed when scanning is detected.
Reference time comparison means 1 for comparing the measured time with the reference time
(31) and a polarity detecting means 3 (31) for detecting whether or not the polarity of the drum switching pulse is a polarity indicating that it is a scanning period by a predetermined head 26 or 27 of the plurality of heads 26 and 27. By comparison between the extraction means 4 (30) for extracting the tracking signal and the polarity detection means 3 (31), when the measured time coincides with the reference time, the signal is recorded together with the recording signal. A level for comparing whether or not the level of the tracking signal extracted by the extracting means 4 (30) from the track adjacent to the recording track to be scanned by the predetermined head 26 or 27 is within an allowable level. Comparing means 5 (31) and generating a capstan frequency signal for generating a capstan frequency signal corresponding to the rotation of the capstan motor 34 A stage 32, 33, the plurality of magnetic heads 26, 27 by counting the capstan frequency signal from the capstan frequency signal generating means 32, 33
A group detection means 6 (37) for outputting a group detection signal corresponding to a group of all tracks formed when the magnetic tape 28 is scanned once each, and a group from the group detection means 6 (37). Counting means 6 (38) for counting detection signals, and CTL signal generating means 6 (38) for generating a CTL signal based on the group number data and the count value output from the counting means 6 (38) are provided. When detecting that the level of the tracking signal is within the range of the allowable level, the control means 7 (31) presets the group number data to the CTL signal generation means 6 (38). CTL signal generation device having the same.

According to a twenty-first aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on the magnetic tape 28 so as to form an inclined track. 27. A method of generating a CTL signal used in a reproducing apparatus that scans the recording signal 27 while switching it with a drum switching pulse and reproduces the recording signal. The plurality of magnetic heads 26 and 27 are respectively operated once by the magnetic tape 28.
Is measured until group number data indicating a group of all tracks formed when scanning is detected.
Reference time comparison means 1 for comparing the measured time with the reference time
(31) and a polarity detecting means 3 (31) for detecting whether or not the polarity of the drum switching pulse is a polarity indicating that it is a scanning period by a predetermined head 26 or 27 of the plurality of heads 26 and 27. The extraction means 4 (30) for extracting the tracking signal and the polarity detection means 3 (31) provide a comparison between the measured time and the reference time. Predetermined head 26 or 27 detected based on
Thus, the level of the tracking signal extracted by the extracting means 4 (30) from a track adjacent to the recording track to be scanned by the predetermined head 26 or 27 is recorded within the allowable level. Level comparing means 5 (31) for comparing whether or not
Capstan frequency signal generating means 32 and 33 for generating a capstan frequency signal corresponding to the rotation of the capstan motor 34;
The capstan frequency signals from the magnetic heads 2 and 33 are counted and a group detection signal corresponding to a group of all tracks formed when the magnetic heads 26 and 27 scan the magnetic tape 28 once each is output. Group detecting means 6 (37) to perform
7) a counting means 6 (38) for counting the group detection signal from (7), and a CTL signal generating means 6 (38) for generating a CTL signal based on the count value output from the counting means 6 (38). , The level comparing means 5
In (31), when it is detected that the level of the tracking signal is within the range of the allowable level, the group number data is converted to the CTL signal generating means 6 (3).
8) with control means 7 (31) for presetting
It is a TL signal generation device.

According to a twenty-second aspect, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on a magnetic tape 28 so as to form an inclined track. 27. A CTL signal generation method used in a reproducing apparatus which scans the recording signal 27 while switching it with a drum switching pulse and reproduces the recording signal, wherein a track in the recording signal is detected after detecting an edge of the drum switching pulse. The time until the number data is detected is measured, and the measured time is compared with a reference time. By the comparison, when the measurement time matches the reference time, the tracking time recorded together with the recording signal. The level of the signal for tracking is compared with the level of the allowable level. When the plurality of magnetic heads scan the magnetic tape one by one each when detecting that they are within the range of the track, the group number data in the recording signal indicating the group of all the tracks formed when the magnetic head scans the magnetic tape one by one. This is a CTL signal generation method that counts the groups from the indicated values and generates a CTL signal that changes from a high level to a low level or from a low level to a high level every time the count value reaches a predetermined value.

According to a twenty-third aspect of the present invention, a plurality of magnetic heads mounted on a rotating drum 25 are used for drum switching by using a plurality of magnetic heads mounted on a rotating drum 25 for recording signals recorded on a magnetic tape in such a manner that tracking signals are superimposed to form inclined tracks. What is claimed is: 1. A CTL signal generating method used in a reproducing apparatus that performs scanning while switching with a pulse and reproduces the recording signal, wherein a track number data in the recording signal is detected after one edge of the drum switching pulse is detected. Is measured, and the measured time is compared with a reference time to determine whether the polarity of the drum switching pulse is a polarity indicating that it is a scanning period by a predetermined head of the plurality of heads. Detected and, by the comparison, are recorded together with the recording signal when the measurement time matches the reference time. Comparing the level of a tracking signal extracted from a track adjacent to a recording track to be scanned by a predetermined head within a range of an allowable level, and determining whether the level of the tracking signal is within the range of the allowable level. When the plurality of magnetic heads scan the magnetic tape once each time when it is detected that the track number is within the range, the value indicated by the group number data in the recording signal indicates the group of all tracks formed when the magnetic head scans the magnetic tape. A CT signal which counts the group and generates a CTL signal which changes from a high level to a low level or from a low level to a high level every time the count value reaches a predetermined value.
This is an L signal generation method.

According to a twenty-fourth aspect of the present invention, a plurality of magnetic heads mounted on a rotating drum 25 are used for drum switching by using a plurality of magnetic heads mounted on a rotary drum 25 for recording a recording signal in which tracking signals are superimposed so as to form an inclined track on a magnetic tape. What is claimed is: 1. A CTL signal generating method used in a reproducing apparatus that performs scanning while switching with a pulse and reproduces the recording signal, wherein a track number data in the recording signal is detected after one edge of the drum switching pulse is detected. Measuring the time until detecting, comparing the measured time with the reference time, detecting whether the polarity of the drum switching pulse is a polarity indicating which of the plurality of heads is the scanning period, By the above comparison, the above measurement time,
When the reference time matches, by a predetermined head detected based on the polarity of the drum switching pulse,
The level of the tracking signal, which is recorded together with the recording signal and extracted from a track adjacent to the recording track to be scanned by the predetermined head, is within a permissible level. When detecting that the level is within the range of the allowable level, each of the plurality of magnetic heads scans the magnetic tape once each, and indicates a group of all tracks formed in the recording signal. CTL signal generation that counts the group from the value indicated by the group number data and generates a CTL signal that goes from high level to low level or from low level to high level every time the count value reaches a predetermined value. Is the way.

According to a twenty-fifth aspect of the present invention, a plurality of magnetic heads mounted on a rotating drum 25 are used for drum switching by using a recording signal recorded with a tracking signal superimposed thereon so as to form an inclined track on a magnetic tape. What is claimed is: 1. A CTL signal generating apparatus used in a reproducing apparatus which scans while switching with a pulse and reproduces the recording signal, wherein a track number data in the recording signal is detected after detecting an edge of the drum switching pulse. A reference time comparing means 1 (31) for measuring the time until the measurement is performed, and comparing the measured time with the reference time. When the measured time matches the reference time, the reference time is recorded together with the recording signal. Level comparing means 5 (31) for comparing whether the level of the tracking signal is within an allowable level range, All tracks formed when the plurality of magnetic heads 26 and 27 scan the magnetic tape 28 once each time when it is detected that the level of the tracking signal is within the range of the allowable level. The group is counted from the value indicated by the group number data in the recording signal, and the CTL changes from a high level to a low level or from a low level to a high level every time the count value reaches a predetermined value. CTL signal generating means 6, 7, 8, 100 (3
1, 37, 38).

According to a twenty-sixth aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on a magnetic tape 28 so as to form an inclined track. 27. A CTL signal generating device used in a reproducing apparatus that scans the recording signal 27 while switching it with a drum switching pulse and reproduces the recording signal, and detects a track in the recording signal after detecting an edge of the drum switching pulse. Reference time comparison means 1 (31) for measuring the time until the number data is detected, and comparing the measured time with the reference time, and the recording when the measured time matches the reference time by the comparison. Level comparing means for comparing whether or not the level of the tracking signal recorded together with the signal is within an allowable level range And (31), the capstan motor 3
And a capstan frequency signal generating means 32, 33 for generating a capstan frequency signal corresponding to the rotation of the motor 4, and counting the capstan frequency signals from the capstan frequency signal generating means 32, 33 to obtain the plurality of magnetic heads 26. , 27 each output a group detection signal corresponding to a group of all tracks formed when the magnetic tape 28 is scanned once each, and counts the group detection signals from the group detection means 37. And a CTL signal generating means 6 (38) for generating a CTL signal based on the count value output from the counting means 6 (38). When detecting that the magnetic head is within the allowable level, the plurality of magnetic heads 26 and 27 A control means 7 (31) for presetting group number data in the recording signal to the CTL signal generation means 6 (38), which indicates a group of all tracks formed when the magnetic tape 28 is scanned one by one. CTL signal generation device having the same.

According to a twenty-seventh aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on a magnetic tape 28 so as to form an inclined track. 27. A method of generating a CTL signal used in a reproducing apparatus that scans the recording signal 27 while switching it with a drum switching pulse and reproduces the recording signal. A reference time comparing means 1 (31) for measuring the time until the track number data is detected, and comparing the measured time with a reference time; A polarity detecting means 3 (31) for detecting whether or not the polarity indicates a scanning period by a predetermined head 26 or 27; And extraction means 4 (30) for extracting a signal for the tracking, the polarity detection means 3 (31)
When the measurement time and the reference time coincide with each other, the extraction means 4 (30) starts from a track adjacent to a recording track to be scanned by the predetermined head 26 or 27 recorded together with the recording signal. ), The level comparing means 5 (3) for comparing whether the level of the tracking signal extracted is within the range of the allowable level.
1), a capstan frequency signal generating means 32, 33 for generating a capstan frequency signal corresponding to the rotation of the capstan motor 34, and counting the capstan frequency signals from the capstan frequency signal generating means 32, 33. A group detection means 6 (37) for outputting a group detection signal corresponding to a group of all tracks formed when the plurality of magnetic heads 26 and 27 scan the magnetic tape 28 once each; Counting means 6 (38) for counting the group detection signal from the detecting means 6 (37);
27 indicates the group number data in the recording signal indicating a group of all tracks formed when the magnetic tape 28 is scanned once each, and the counting means 6 (3
CTL signal generating means 6 (38) for generating a CTL signal based on the count value output from 8), and when it is detected that the level of the tracking signal is within the range of the allowable level. CTL signal generation device having control means 7 (31) for presetting the group number data in the CTL signal generation means 6 (38).

According to a twenty-eighth aspect of the present invention, a plurality of magnetic heads 26 mounted on a rotating drum 25 transfer a recording signal recorded with a tracking signal superimposed on a magnetic tape 28 so as to form an inclined track. 27. A method of generating a CTL signal used in a reproducing apparatus that scans the recording signal 27 while switching it with a drum switching pulse and reproduces the recording signal. And a reference time comparing means 1 (31) for measuring the time until the track number data is detected and comparing the measured time with a reference time, and the polarity of the drum switching pulse among the plurality of heads 26 and 27. A polarity detecting means 3 (31) for detecting whether or not the polarity indicates a scanning period by a predetermined head 26 or 27; And extraction means 4 (30) for extracting a signal for the tracking, the polarity detection means 3 (31)
When the measurement time and the reference time coincide with each other, the predetermined head 26 or 27 detected based on the polarity of the drum switching pulse is recorded together with the recording signal, and the predetermined head 26 or 2
7, level comparing means 5 (31) for comparing whether or not the level of the tracking signal extracted by the extracting means 4 (30) from the track adjacent to the recording track to be scanned is within an allowable level; Capstan frequency signal generating means 32, 33 for generating a capstan frequency signal corresponding to the rotation of the capstan motor 34;
The capstan frequency signals from the capstan frequency signal generating means 32, 33 are counted, and the plurality of magnetic heads 26, 27 scan the magnetic tape 28 once each to form a group of all tracks. Group detection means 6 for outputting a corresponding group detection signal
(37) and counting means 6 (38) for counting the group detection signal from the group detecting means 6 (37).
And a CTL signal generating means 6 for generating a CTL signal based on the count value output from the counting means 6 (38).
(38), and when the level comparing means 5 (31) detects that the level of the tracking signal is within the range of the allowable level, the plurality of magnetic heads 26 and 27 are set to 1 respectively. Shows a group of all tracks formed when the magnetic tape 28 is scanned each time,
Control means 7 (3) for presetting the group number data in the recording signal to the CTL signal generating means 6 (38)
1) a CTL signal generation device.

[0046]

According to the first aspect of the present invention, the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is compared with the reference time. The comparison compares whether the level of the tracking signal recorded together with the recording signal is within the range of the allowable level when the measurement time and the reference time match, and determines that the level of the tracking signal is within the allowable level. When detecting that it is within the range, the recording track is counted from the value indicated by the track number data extracted from the recording signal, and every time the count value reaches a predetermined value,
A CTL signal that changes from a high level to a low level or from a low level to a high level is generated. Accordingly, if the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the level of the tracking signal is within the allowable level, the track number Output an accurate CTL signal obtained by counting from the value indicated by the data,
If the time from when the edge of the drum switching pulse is detected to when the track number data is detected is not the reference time, or when the level of the tracking signal is not within the allowable range, the track number data is preset. The CTL signal obtained by performing the counting can be output without performing the counting.

According to the second aspect of the present invention, the time from the detection of one edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is compared with the reference time. Then, it is detected whether the polarity of the drum switching pulse is a polarity indicating that the scanning period is performed by the predetermined head 26 or 27 of the plurality of heads 26, 27, and the measured time and the reference time match by comparison. In this case, the level of the tracking signal extracted from the adjacent track of the recording track to be scanned by the predetermined head 26 or 27 recorded together with the recording signal is compared with an allowable level, and
When detecting that the level of the tracking signal is within the range of the allowable level, the recording track is counted from the value indicated by the track number data extracted from the recording signal, and every time the count value reaches a predetermined value. From the high level to the low level or from the low level to the high level
Generate a TL signal. As a result, the time from the detection of the edge of the drum switching pulse to the detection of the track number data coincides with the reference time, and the level of the tracking signal obtained from the adjacent track of the predetermined head 26 or 27 is determined. Is within the allowable level range, an accurate CTL signal obtained by counting from the value indicated by the track number data is output, and from when the edge of the drum switching pulse is detected until the track number data is detected. If the time is not the reference time, or if the level of the tracking signal is not within the range of the allowable level, the CTL signal obtained by counting without performing the presetting of the track number data can be output. .

According to the third aspect described above, the time from the detection of one edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is compared with the reference time. Then, the polarity of the drum switching pulse is detected to indicate which one of the plurality of heads 26 and 27 is the scanning period by the head 26 or 27, and if the measurement time and the reference time match by comparison, The level of a tracking signal extracted from a track adjacent to a recording track to be scanned by the predetermined head is recorded together with the recording signal by the predetermined head 26 or 27 detected based on the polarity of the drum switching pulse. Comparing whether the level is within the level range or not, it is detected that the level of the tracking signal is within the allowable level range. Then, the recording track is counted from the value indicated by the track number data extracted from the recording signal, and each time the count value reaches a predetermined value, the CTL signal changes from high level to low level or from low level to high level. Generate Thereby, the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and
If the level of the tracking signal obtained from the adjacent track of the scanning head 26 or 27 is within the allowable level, an accurate CTL signal obtained by counting from the value indicated by the track number data is output. If the time from when the edge of the drum switching pulse is detected until the track number data is detected is not the reference time, or when the level of the tracking signal is not within the allowable range, the track number data is output. The CTL signal obtained by performing the counting without performing the preset can be output.

According to the fourth aspect, the reference time comparing means 1 measures the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal, and measures the measured time. Is compared with the reference time, and based on this comparison, the level comparing means 5 determines whether or not the level of the tracking signal recorded together with the recording signal when the measured time and the reference time match is within the allowable level. In comparison, when it is detected that the level of the tracking signal is within the allowable level range, the CTL signal generating means 6 counts the recording tracks from the value indicated by the track number data extracted from the recording signal. ,
Each time the count value reaches a predetermined value, a CTL signal that changes from a high level to a low level or from a low level to a high level is generated. Accordingly, if the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the level of the tracking signal is within the allowable level, the track number An accurate CTL signal obtained by counting from the value indicated by the data is output, and the time from the detection of the edge of the drum switching pulse to the detection of the track number data is not the reference time, or a signal for tracking. If your level is not within acceptable levels,
A CTL signal obtained by counting without performing presetting of track number data can be output.

According to the fifth aspect of the present invention, from the detection of the edge of the drum switching pulse by the reference time comparison means 1 (29, 31, 32, 33) to the detection of the track number data in the recording signal. Is measured, and the measured time is compared with the reference time.If the measured time and the reference time match, the level of the tracking signal recorded together with the recording signal is within the allowable level. Whether or not the capstan frequency signal corresponding to the rotation of the capstan motor 34 from the capstan frequency signal generating means 35 is counted by the track detecting means 6 (37) to determine whether or not the recording track has been recorded. , And outputs a CTL signal based on the track detection signal.
8), and when it is detected that the level of the tracking signal is within the range of the allowable level, the CTL signal generating means 6 (38) sends the track number data extracted from the recording signal to the control means 7 (38). Preset by 31). Thus, if the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the level of the tracking signal is within the allowable level, the track number When the accurate CTL signal obtained by counting the track detection signal from the value indicated by the data is output and the time from detecting the edge of the drum switching pulse to detecting the track number data is not the reference time, If the level of the tracking signal is not within the range of the allowable level, the CTL signal obtained by counting the track detection signal without presetting the track number data can be output.

According to the sixth aspect described above, the reference time comparison means 1 (29, 31, 32, 33) detects one edge of the drum switching pulse and then detects the track number data in the recording signal. When the measured time is compared with a reference time, whether the polarity of the drum switching pulse is a polarity indicating that it is a scanning period by a predetermined head 26 or 27 among the plurality of heads 26 and 27 or not is determined. The polarity detection means 3 (31, 32, 3
3), and when the measured time and the reference time match by comparison by the polarity detecting means 3 (31, 32, 33), the predetermined level recorded together with the recording signal by the level comparing means 5 (31). The level of the tracking signal extracted by the extracting means 4 (30) from the track adjacent to the recording track to be scanned by the head 26 or 27 is compared with an allowable level. The capstan frequency signal corresponding to the rotation of the capstan motor 34 from the capstan frequency signal generating means 35 is counted, a track detection signal corresponding to the recording track is output, and the CTL signal is converted to CTL based on the track detection signal. The level is generated by the signal generating means 38 and the level of the tracking signal is allowed in the level comparing means 5 (31). When it is detected that is within the level preset by the control unit 5 (31) the track number data extracted from the recording signal to the CTL signal generating means 38. As a result, the time from the detection of the edge of the drum switching pulse to the detection of the track number data coincides with the reference time, and the level of the tracking signal obtained by the predetermined head 26 or 27 becomes an allowable level. , The accurate CTL signal obtained by counting the track detection signal from the value indicated by the track number data is output, and after detecting the edge of the drum switching pulse, the track number data is detected. If the time up to is not the reference time, or if the level of the tracking signal is not within the allowable range, the CTL signal obtained by counting the track detection signal without presetting the track number data is used. Can be output.

According to the seventh aspect described above, the reference time comparison means 1 (29, 31, 32, 33) detects one edge of the drum switching pulse and then detects the track number data in the recording signal. The measured time is compared with a reference time, and whether the polarity of the drum switching pulse is a polarity indicating that it is a scanning period by a predetermined head 26 or 27 among the plurality of heads 26 and 27 or not is determined. Is detected by the polarity detection means 3 (31, 32, 33), and the polarity detection means 3 (31, 32, 33) compares the measured time with the polarity of the drum switching pulse when the reference time coincides. The recording is performed together with the recording signal by the predetermined head 26 or 27 detected based on the detected signal, and the adjacent track of the recording track to be scanned by the predetermined head 26 or 27 is detected. Tsu extracted from the click means 4 (30, 31)
The level comparing means 5 (31) compares whether or not the level of the tracking signal extracted by the above is within the range of the allowable level, and corresponds to the rotation of the capstan motor 34 from the capstan circumference name signal generating means 35. The detected capstan frequency signal is counted, a track detection signal corresponding to the recording track is output by the track detection means 37, and a CTL signal is generated by the CTL signal generation means 38 based on the track detection signal, and the level comparison means 5 ( When it is detected in 31) that the level of the tracking signal is within the range of the allowable level, the track number data extracted from the recording signal is sent to the CTL signal generation means 38 by the control means 7.
Preset at (31). Thereby, the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and
If the level of the tracking signal obtained by the head 26 or 27 during scanning is within an allowable level, an accurate CTL signal obtained by counting the track detection signal from the value indicated by the track number data If the time between the detection of the edge of the drum switching pulse and the detection of the track number data is not the reference time, or the level of the tracking signal is not within the allowable range, the track number data is output. The CTL signal obtained by counting the track detection signal without performing the preset can be output.

According to the eighth aspect, the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is compared with the reference time. The comparison compares whether the level of the tracking signal recorded together with the recording signal when the measurement time and the reference time match is within the range of the allowable level, and determines that the level of the tracking signal is within the allowable level. When it is detected that the data is within the range, the plurality of magnetic heads 26 and 27 are respectively operated once by the magnetic tape 28 based on the track number data extracted from the recording signal.
New group number data indicating the group of all tracks formed when scanning is performed, the groups are counted from the value indicated by the group number data, and each time the count value reaches a predetermined value, the level is changed from high level to low level. Alternatively, a CTL signal that changes from a low level to a high level is generated.
Accordingly, if the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the level of the tracking signal is within the allowable level, the group number Accurate CTL obtained by counting from the value indicated by the data
If the time from outputting the signal and detecting the edge of the drum switching pulse to detecting the track number data is not the reference time, or if the level of the tracking signal is not within the allowable level, the group number The CTL signal obtained by counting without performing data preset can be output.

According to the ninth aspect described above, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is compared with the reference time. Then, it is detected whether the polarity of the drum switching pulse is a polarity indicating that the scanning period is performed by the predetermined head 26 or 27 of the plurality of heads 26, 27, and the measured time and the reference time match by comparison. In this case, the level of the tracking signal extracted from the adjacent track of the recording track to be scanned by the predetermined head 26 or 27 recorded together with the recording signal is compared with an allowable level, and
When it is detected that the level of the tracking signal is within the range of the allowable level, the plurality of magnetic heads 26, 2 based on the track number data extracted from the recording signal.
7 obtains new group number data indicating a group of all tracks formed when the magnetic tape 28 is scanned once each time, counts the groups from the value indicated by the group number data, and sets the count value to a predetermined value. Each time the CTL signal changes from a high level to a low level or from a low level to a high level. As a result, the time from the detection of the edge of the drum switching pulse to the detection of the track number data coincides with the reference time, and the level of the tracking signal obtained from the adjacent track of the predetermined head 26 or 27 is determined. Is within the range of the allowable level, an accurate CTL signal obtained by counting from the value indicated by the group number data is output, and from the detection of the edge of the drum switching pulse to the detection of the track number data. When the time is not the reference time, or when the level of the tracking signal is not within the range of the allowable level, the CTL signal obtained by counting without performing the presetting of the group number data can be output. .

According to the tenth aspect, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is compared with the reference time. Then, the polarity of the drum switching pulse is detected to indicate which one of the plurality of heads 26 and 27 is the scanning period by the head 26 or 27, and if the measurement time and the reference time match by comparison, The level of a tracking signal that is recorded along with a recording signal by a predetermined head detected based on the polarity of the drum switching pulse and extracted from a track adjacent to a recording track to be scanned by the predetermined head 26 or 27 is allowed. Compare whether the signal is within the level range or not, and confirm that the level of the tracking signal is within the allowable level. When issued, based on the track number data extracted from the recording signal, a plurality of magnetic heads 2
6, 27 each obtains new group number data indicating a group of all tracks formed when the magnetic tape 28 is scanned once, and from the value indicated by the group number data,
The groups are counted, and each time the count value reaches a predetermined value, a CTL signal that changes from a high level to a low level or from a low level to a high level is generated. As a result, the time from the detection of the edge of the drum switching pulse to the detection of the track number data coincides with the reference time, and the tracking signal obtained from the adjacent track of the head 26 or 27 being scanned. If the level is within the range of the allowable level, an accurate CTL signal obtained by counting from the value indicated by the group number data is output, and the track number data is detected after detecting the edge of the drum switching pulse. If the time up to is not the reference time, or if the level of the tracking signal is not within the range of the allowable level, the CT obtained by counting without performing the presetting of the group number data is performed.
An L signal can be output.

According to the eleventh aspect, the reference time comparing means 1 (31) measures the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal. The measured time is compared with the reference time, and if the measured time matches the reference time, the level comparison is performed to determine whether the level of the tracking signal recorded together with the recording signal is within the allowable level. Means 5 (31), when it is detected that the level of the tracking signal is within the range of the allowable level, based on the track number data extracted from the recording signal, a plurality of magnetic heads 26, 27. Obtains new group number data indicating a group of all tracks formed when the magnetic tape 28 is scanned once each time. From the value, counting the group, each time the count value reaches a predetermined value, the low level from the high level, or the CTL signal from the low level to the high level CTL signal generating means 6,7,8,100 (31,3
7, 38). Accordingly, when the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the level of the tracking signal is within the allowable level, the group number An accurate CTL signal obtained by counting the group from the value indicated by the data is output, and the time from the detection of the edge of the drum switching pulse to the detection of the track number data is not the reference time, If the signal level is not within the range of the allowable level, the CTL obtained by counting the groups without presetting the group number data
A signal can be output.

According to the twelfth aspect, the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is defined as the reference time. Comparison means 1 (31)
When the measured time and the reference time match, the level comparison means 5 (31) compares whether or not the level of the tracking signal recorded together with the recording signal is within an allowable level. The capstan frequency signal corresponding to the rotation of the capstan motor 34 is generated by the capstan frequency signal generating means 32, 33, and the capstan frequency from the capstan frequency signal generating means 32, 33 is detected by the group detecting means 37. The signals are counted, and a plurality of magnetic heads 26 and 27 each output a group detection signal corresponding to a group of all tracks formed by scanning the magnetic tape 28 once each time. The signal is counted by the counting means 6 (3
8), based on the track number data extracted from the recording signal, based on the track number data, a new group of all tracks formed when the magnetic heads 26 and 27 scan the magnetic tape 28 once each. The group number data is obtained by the group number obtaining means 100 (31), the CTL signal is generated by the CTL signal generation means 6 (38) based on the count value output from the counting means 6 (38), and the level of the tracking signal is obtained. Is detected within the range of the allowable level, the group number obtaining means 100 (31)
The CTL signal generation means 6 (3
8) Preset by the control means 7 (31). Accordingly, if the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the level of the tracking signal is within the allowable level, the group number If an accurate CTL signal obtained by counting the group detection signal from the value indicated by the data is output and the time from detecting the edge of the drum switching pulse to detecting the track number data is not the reference time, If the level of the tracking signal is not within the acceptable range,
The CTL signal obtained by counting the group detection signal without presetting the group number data can be output.

According to the thirteenth aspect, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is defined as the reference time. Reference time comparison means 1
Comparing in (31), the polarity detecting means 3 (31) detects whether or not the polarity of the drum switching pulse is a polarity indicating that it is a scanning period by a predetermined head 26 or 27 of the plurality of heads 26, 27. Then, the tracking signal is extracted by the extracting means 4 (30), and the polarity detecting means 3 (31) is extracted.
When the measured time and the reference time coincide with each other, the level comparing means 5 (31) starts scanning from a track adjacent to the recording track to be scanned by the predetermined head 26 or 27 recorded together with the recording signal. Whether the level of the tracking signal extracted by the extracting means 4 (30) is within the range of an allowable level is compared, and a capstan frequency signal corresponding to the rotation of the capstan motor 34 is converted to a capstan frequency signal generating means 32. , 33, and the capstan frequency signal from the capstan frequency signal generating means 32, 33 is counted by the group detecting means 6 (37), and the plurality of magnetic heads 26, 27 are counted.
Output a group detection signal corresponding to a group of all tracks formed when the magnetic tape 28 is scanned once each, and the group detection signal from the group detection means 6 (37) is output by the counting means 6 (38). The plurality of magnetic heads 26, 27 are respectively counted once by the magnetic tape 28 based on the track number data extracted from the recording signal.
New group number data indicating the group of all the tracks formed when scanning
00 (31), and outputs the CTL signal based on the count value output from the counting means 6 (38).
When it is generated in (38) and it is detected that the level of the tracking signal is within the range of the allowable level, the group number data from the group number obtaining means 100 (31) is generated by the CTL signal generating means 6 (38). Control means 7 (3
Preset by 1). Thereby, the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and
If the level of the tracking signal obtained by the predetermined head 26 or 27 is within the allowable level, an accurate CTL signal obtained by counting the group detection signal from the value indicated by the group number data is output. If the time from when the edge of the drum switching pulse is detected until the track number data is detected is not the reference time, or when the level of the tracking signal is not within the allowable level, the group number data is output. The CTL signal obtained by counting the group detection signal without performing the preset can be output.

According to the fourteenth aspect, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is defined as the reference time. Reference time comparison means 1
Comparing in (31), the polarity detecting means 3 (31) detects whether or not the polarity of the drum switching pulse is a polarity indicating that it is a scanning period by a predetermined head 26 or 27 of the plurality of heads 26, 27. Then, the tracking signal is extracted by the extracting means 4 (30), and the polarity detecting means 3 (31) is extracted.
When the measured time and the reference time match as a result of the comparison in (2), the level comparison means 5 (31) records the signal together with the recording signal by the predetermined head 26 or 27 detected based on the polarity of the drum switching pulse, The capstan motor 34 compares whether or not the level of the tracking signal extracted by the extracting means 4 (30) from a track adjacent to the recording track to be scanned by the predetermined head 26 or 27 is within an allowable level. The capstan frequency signal corresponding to the rotation of the group is generated by the capstan frequency signal generating means 32 and 33,
According to (37), the capstan frequency signals from the capstan frequency signal generating means 32, 33 are counted, and all the tracks formed when the magnetic heads 26, 27 scan the magnetic tape 28 once each time. The group detection signal from the group detection means 6 (37) is output by the counting means 6 (38), and based on the track number data extracted from the recording signal, a plurality of group detection signals are output. Magnetic heads 26, 27
Obtains new group number data indicating a group of all tracks formed when the magnetic tape 28 is scanned once by the group number obtaining means 100 (31), and outputs the count value from the counting means 6 (38). CT based on
The L signal is generated by the CTL signal generating means 6 (38), and is extracted from the recording signal when the level comparing means 5 (31) detects that the level of the tracking signal is within the allowable level range. Track number data is CT
The L signal generating means 6 (38) is preset by the control means 7 (31). Thereby, the time from the detection of the edge of the drum switching pulse to the detection of the track number data coincides with the reference time, and the level of the tracking signal obtained by the head 26 or 27 during scanning is allowed. If the level is within the range, an accurate CTL signal obtained by counting the group detection signal from the value indicated by the group number data is output, and the track number data is detected after detecting the edge of the drum switching pulse. If the time until the time is not the reference time, or if the level of the tracking signal is not within the range of the allowable level, the CTL signal obtained by counting the group detection signal without presetting the group number data Can be output.

According to the fifteenth aspect described above, a group of all tracks formed when the plurality of magnetic heads 26 and 27 scan the magnetic tape 28 once each after detecting the edge of the drum switching pulse. Is measured, the time until the detection of the group number data in the recording signal is measured, and the measured time is compared with the reference time.
When the measurement time and the reference time coincide, the level of the tracking signal recorded together with the recording signal is compared with whether or not the level is within an allowable level, and the level of the tracking signal is within the allowable level. When it is detected that there is, the group is counted from the value indicated by the group number data, and each time the count value reaches a predetermined value, a CTL signal that changes from a high level to a low level or from a low level to a high level is generated. . Accordingly, when the time from the detection of the edge of the drum switching pulse to the detection of the group number data matches the reference time, and the level of the tracking signal is within the allowable level, the group number An accurate CTL signal obtained by counting from the value indicated by the data is output, and the time from when the edge of the drum switching pulse is detected to when the group number data is detected is not the reference time, or when the signal for tracking is used. Is not within the range of the allowable level, the CTL signal obtained by counting without presetting the group number data can be output.

According to the sixteenth aspect described above, all the tracks formed when the plurality of magnetic heads 26 and 27 scan the magnetic tape 28 once each after detecting one edge of the drum switching pulse. The time until the detection of the group number data in the recording signal indicating the group of the recording signal is measured, and the measured time is compared with the reference time.
Of the predetermined head 26 or 27 is detected to determine whether or not the polarity indicates that it is a scanning period, and a comparison is made between the measurement time and the reference time when the reference time matches the predetermined head 26 which is recorded together with the recording signal. Or 27, comparing whether the level of a tracking signal extracted from a track adjacent to a recording track to be scanned is within an allowable level, and determining that the level of the tracking signal is within an allowable level. Is detected, the group is counted from the value indicated by the group number data, and each time the count value reaches a predetermined value, a CTL signal that changes from a high level to a low level or from a low level to a high level is generated. As a result, the time from the detection of the edge of the drum switching pulse to the detection of the group number data coincides with the reference time, and the level of the tracking signal obtained from the adjacent track of the predetermined head 26 or 27 is determined. Is within the range of the allowable level, an accurate CTL signal obtained by counting from the value indicated by the group number data is output, and from when the edge of the drum switching pulse is detected to when the group number data is detected. When the time is not the reference time, or when the level of the tracking signal is not within the range of the allowable level, the CTL signal obtained by counting without performing the presetting of the group number data can be output. .

According to the seventeenth aspect described above, all tracks formed when the plurality of magnetic heads 26 and 27 scan the magnetic tape 28 once each after detecting one edge of the drum switching pulse. The time until the detection of the group number data in the recording signal indicating the group of the recording signal is measured, and the measured time is compared with the reference time.
Of the head 26 or 27 is detected, and if the measured time and the reference time match, a predetermined head detected based on the polarity of the drum switching pulse is detected. By comparing whether the level of the tracking signal recorded from the adjacent track of the recording track to be scanned by the predetermined head 26 or 27 is within the range of the allowable level, When it is detected that the signal level is within the allowable level range, the group is counted from the value indicated by the group number data, and every time the count value reaches a predetermined value, the level is changed from high level to low level or low level. To generate a CTL signal that goes high. As a result, the time from the detection of the edge of the drum switching pulse to the detection of the group number data coincides with the reference time, and the tracking signal obtained from the adjacent track of the head 26 or 27 being scanned. If the level is within the acceptable level,
An accurate CTL signal obtained by counting from the value indicated by the group number data is output, and the time from when the edge of the drum switching pulse is detected to when the group number data is detected is not the reference time, Is not within the range of the allowable level, the CTL signal obtained by counting without performing the presetting of the group number data can be output.

According to the eighteenth aspect, the plurality of magnetic heads 26 and 27 scan the magnetic tape 28 once each after the edge of the drum switching pulse is detected by the reference time comparing means 1 (31). Measure the time until the group number data in the recording signal is detected, indicating the group of all tracks formed when the measurement is performed, and compare the measured time with the reference time. If they match, the level comparing means 5 (31) compares whether or not the level of the tracking signal recorded together with the recording signal is within the range of the permissible level, and the level of the tracking signal is within the range of the permissible level. Is detected, the group is counted from the value indicated by the group number data, and each time the count value reaches a predetermined value,
The CTL signal that changes from the high level to the low level or from the low level to the high level is generated by the CTL signal generation means 6, 7,
8, 100 (31, 37, 38). Accordingly, if the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the level of the tracking signal is within the allowable level, the group number Accurate CT obtained by counting groups from the value indicated by the data
If the time from when the L signal is output and the edge of the drum switching pulse is detected to when the group number data is detected is not the reference time, or when the level of the tracking signal is not within the allowable level, the group It is possible to output a CTL signal obtained by performing group counting without presetting number data.

According to the nineteenth aspect, a group of all tracks formed when the plurality of magnetic heads 26 and 27 scan the magnetic tape 28 once each after detecting the edge of the drum switching pulse. Is measured until the group number data in the recording signal is detected, and the measured time is compared with the reference time by the reference time comparison means 1
The comparison is performed in (31), and when the measured time and the reference time match, it is determined whether or not the level of the tracking signal recorded together with the recording signal is within the allowable level range. The capstan frequency signal corresponding to the rotation of the capstan motor 34 is generated by the capstan frequency signal generating means 32, 33, and the group detecting means 37 outputs the capstan frequency signal from the capstan frequency signal generating means 32, 33. The capstan frequency signal is counted, and a plurality of magnetic heads 26 and 27 each output a group detection signal corresponding to a group of all tracks formed when the magnetic head 28 scans the magnetic tape 28 once. Is counted by the counting means 6 (38), and the count value is output from the counting means 6 (38). The CTL signal generated by the CTL signal generator 6 (38) based on, when the level of the signal for tracking is detected to be in the range of acceptable levels, CTL signal generating means a group number data 6 (3
8) Preset by the control means 7 (31). Accordingly, when the time from the detection of the edge of the drum switching pulse to the detection of the group number data matches the reference time, and the level of the tracking signal is within the allowable level, the group number If an accurate CTL signal obtained by counting the group detection signal from the value indicated by the data is output and the time from detecting the edge of the drum switching pulse to detecting the group number data is not the reference time, If the level of the tracking signal is not within acceptable levels,
The CTL signal obtained by counting the group detection signal without presetting the group number data can be output.

According to the twentieth aspect described above, all tracks formed when the plurality of magnetic heads 26 and 27 scan the magnetic tape 28 once each after detecting one edge of the drum switching pulse. The time until the detection of the group number data in the recording signal indicating the group No. is measured, and the measured time is compared with the reference time by the reference time comparison means 1 (31). Predetermined head 2 of heads 26 and 27
The polarity detecting means 3 (31) detects whether or not the polarity indicates the scanning period of 6 or 27, and the tracking signal is extracted by the extracting means 4 (30).
As a result of the comparison in (31), when the measured time matches the reference time, the level comparison means 5 (31) determines the recording track to be scanned by the predetermined head 26 or 27 recorded together with the recording signal. A comparison is made as to whether or not the level of the tracking signal extracted from the adjacent track by the extraction means 4 (30) is within an allowable level.
Capstan frequency signal corresponding to the rotation of the capstan motor 34 is output to capstan frequency signal generating means 32, 3
3, the capstan frequency signals from the capstan frequency signal generating means 32, 33 are counted by the group detecting means 6 (37), and the plurality of magnetic heads 2 are counted.
6 and 27 each output a group detection signal corresponding to a group of all tracks formed when the magnetic tape 28 is scanned once each, and counts the group detection signal from the group detection means 6 (37) to the count means 6 (37). 38), a CTL signal is generated by the CTL signal generating means 6 (38) based on the count value output from the counting means 6 (38), and the level of the tracking signal is within an allowable level. Is detected, the group number data is preset in the CTL signal generation means 6 (38) by the control means 7 (31). As a result, the time from the detection of the edge of the drum switching pulse to the detection of the group number data coincides with the reference time, and the level of the tracking signal obtained by the predetermined head 26 or 27 becomes an allowable level. Is within the range, an accurate CTL signal obtained by counting the group detection signal from the value indicated by the group number data is output, and the edge of the drum switching pulse is detected, and then the group number data is detected. If the time up to is not the reference time, or if the level of the tracking signal is not within the allowable range, the CTL obtained by counting the group detection signal without presetting the group number data
A signal can be output.

According to the twenty-first aspect, all tracks formed when the plurality of magnetic heads 26 and 27 scan the magnetic tape 28 once each after detecting one edge of the drum switching pulse. Is measured until the group number data in the recording signal is detected, and the measured time is compared with the reference time by the reference time comparison means 1 (31). Predetermined head 2 of heads 26 and 27
The polarity detecting means 3 (31) detects whether or not the polarity indicates the scanning period of 6 or 27, and the tracking signal is extracted by the extracting means 4 (30).
As a result of the comparison in (31), when the measured time and the reference time match, the predetermined head 26 or 27 detected based on the polarity of the drum switching pulse by the level comparing means 5 (31) together with the recording signal. The level of the tracking signal extracted by the extracting means 4 (30) from the track adjacent to the recording track to be recorded and to be scanned by the predetermined head 26 or 27 is compared with an allowable level. The capstan frequency signal corresponding to the rotation of the stun motor 34 is generated by the capstan frequency signal generating means 32, 33, and the capstan frequency from the capstan frequency signal generating means 32, 33 is detected by the group detecting means 6 (37). The signals are counted, and a plurality of magnetic heads 26 and 27 run on the magnetic tape 28 once each. Group a detection signal output, counting the group detection signals from the group detection means 6 (37) in counting means 6 (38), counting means 6 (3 corresponding to the group of all tracks formed upon
8) The CTL signal is output based on the count value output from
The signal is generated by the signal generating means 6 (38),
When it is detected in (31) that the level of the tracking signal is within the range of the allowable level, the group number data extracted from the recording signal is sent to the CTL signal generation means 6 (38) by the control means 7 (31). To preset. Thus, the time from the detection of the edge of the drum switching pulse to the detection of the group number data coincides with the reference time, and the level of the tracking signal obtained by the head 26 or 27 during scanning is allowed. If the level is within the range, an accurate CTL signal obtained by counting the group detection signal from the value indicated by the group number data is output, and the edge of the drum switching pulse is detected, and then the group number data is detected. If the time until the time is not the reference time, or if the level of the tracking signal is not within the range of the allowable level, the CTL signal obtained by counting the group detection signal without presetting the group number data Can be output.

According to the twenty-second aspect described above, the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is compared with the reference time. The comparison compares whether the level of the tracking signal recorded together with the recording signal is within the range of the allowable level when the measurement time and the reference time match, and determines that the level of the tracking signal is within the allowable level. When it is detected that the distance is within the range, the plurality of magnetic heads 26 and 27
The group is counted from the value indicated by the group number data indicating the group of all the tracks formed when scanning is performed. Become C
Generate a TL signal. Accordingly, when the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the level of the tracking signal is within the allowable level, the group number An accurate CTL signal obtained by counting from the value indicated by the data is output, and the time from the detection of the edge of the drum switching pulse to the detection of the track number data is not the reference time, or a signal for tracking. Is not within the range of the allowable level, the CTL signal obtained by counting without presetting the group number data can be output.

According to the twenty-third aspect, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is compared with the reference time. Then, it is detected whether the polarity of the drum switching pulse is a polarity indicating that the scanning period is performed by the predetermined head 26 or 27 of the plurality of heads 26, 27, and the measured time and the reference time match by comparison. In this case, the level of the tracking signal extracted from the adjacent track of the recording track to be scanned by the predetermined head 26 or 27 recorded together with the recording signal is compared with an allowable level, and
When detecting that the level of the tracking signal is within the allowable range, the plurality of magnetic heads 26, 2
7 counts the group from the value indicated by the group number data indicating the group of all the tracks formed when the magnetic tape 28 is scanned once each time. Each time the count value reaches a predetermined value, the count is changed from a high level to a low level. A CTL signal that changes from a level or a low level to a high level is generated.
Thereby, the time from the detection of the edge of the drum switching pulse to the detection of the track number data coincides with the reference time, and the predetermined head 26 or 27
If the level of the tracking signal obtained from the adjacent track is within the allowable level, an accurate CT obtained by counting from the value indicated by the group number data is obtained.
If the time from outputting the L signal and detecting the edge of the drum switching pulse to detecting the track number data is not the reference time, or if the level of the tracking signal is not within the allowable level, the group A CTL signal obtained by counting without performing presetting of number data can be output.

According to the twenty-fourth aspect, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is compared with the reference time. Then, the polarity of the drum switching pulse is detected to indicate which one of the plurality of heads 26 and 27 is the scanning period by the head 26 or 27, and if the measurement time and the reference time match by comparison, The level of a tracking signal that is recorded along with a recording signal by a predetermined head detected based on the polarity of the drum switching pulse and extracted from a track adjacent to a recording track to be scanned by the predetermined head 26 or 27 is allowed. Compare whether the signal is within the level range or not, and confirm that the level of the tracking signal is within the allowable level. When issued, the plurality of magnetic heads 2
The groups 6 and 27 count the groups from the values indicated by the group number data indicating the groups of all the tracks formed when the magnetic tape 28 is scanned once each time. Each time the count value reaches a predetermined value, the high level is set. From the low level or from the low level to the high level. As a result, the time from the detection of the edge of the drum switching pulse to the detection of the track number data coincides with the reference time, and the tracking signal obtained from the adjacent track of the head 26 or 27 being scanned. If the level is within the range of the allowable level, an accurate CTL signal obtained by counting from the value indicated by the group number data is output, and the track number data is detected after detecting the edge of the drum switching pulse. If the time until is not the reference time, or if the level of the tracking signal is not within the range of the allowable level, the CTL signal obtained by counting without performing the presetting of the group number data may be output. it can.

According to the twenty-fifth aspect, the reference time comparing means 1 (31) measures the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal. The measured time is compared with the reference time, and if the measured time matches the reference time, the level comparison is performed to determine whether the level of the tracking signal recorded together with the recording signal is within the allowable level. Means 5 (31), when it is detected that the level of the tracking signal is within the range of the allowable level, and when the plurality of magnetic heads 26 and 27 scan the magnetic tape 28 once each, The group is counted from the value indicated by the group number data indicating the group of all the tracks to be formed. Bell or from the low level to the high level CTL signal CTL signal generation means 6 and 7,
8, 100 (31, 37, 38). Accordingly, if the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the level of the tracking signal is within the allowable level, the group number Accurate CT obtained by counting groups from the value indicated by the data
If the time from when the L signal is output and the edge of the drum switching pulse is detected to when the track number data is detected is not the reference time, or when the level of the tracking signal is not within the allowable level, the group is output. The CTL signal obtained by counting the groups without presetting the number data can be output.

According to the twenty-sixth aspect, the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is used as the reference time. Comparison means 1 (31)
When the measured time and the reference time match, the level comparison means 5 (31) compares whether or not the level of the tracking signal recorded together with the recording signal is within an allowable level. The capstan frequency signal corresponding to the rotation of the capstan motor 34 is generated by the capstan frequency signal generating means 32, 33, and the capstan frequency from the capstan frequency signal generating means 32, 33 is detected by the group detecting means 37. The signals are counted, and a plurality of magnetic heads 26 and 27 each output a group detection signal corresponding to a group of all tracks formed by scanning the magnetic tape 28 once each time. The signal is counted by the counting means 6 (3
8) and counts the CTL signal based on the count value output from the counting means 6 (38).
A plurality of magnetic heads 26 and 27 are formed when each of the plurality of magnetic heads 26 and 27 scans the magnetic tape 28 once, when it is generated in (38) and detects that the level of the tracking signal is within the allowable level range. The control means 7 (31) presets group number data indicating a group of all tracks to be stored in the CTL signal generating means 6 (38). Accordingly, when the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the level of the tracking signal is within the allowable level, the group number If an accurate CTL signal obtained by counting the group detection signal from the value indicated by the data is output and the time from detecting the edge of the drum switching pulse to detecting the track number data is not the reference time, When the level of the tracking signal is not within the range of the allowable level, the CTL signal obtained by counting the group detection signal without presetting the group number data can be output.

According to the twenty-seventh aspect, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is defined as the reference time. Reference time comparison means 1
Comparing in (31), the polarity detecting means 3 (31) detects whether or not the polarity of the drum switching pulse is a polarity indicating that it is a scanning period by a predetermined head 26 or 27 of the plurality of heads 26, 27. Then, the tracking signal is extracted by the extracting means 4 (30), and the polarity detecting means 3 (31) is extracted.
When the measured time and the reference time coincide with each other, the level comparing means 5 (31) starts scanning from a track adjacent to the recording track to be scanned by the predetermined head 26 or 27 recorded together with the recording signal. Whether the level of the tracking signal extracted by the extracting means 4 (30) is within the range of an allowable level is compared, and a capstan frequency signal corresponding to the rotation of the capstan motor 34 is converted to a capstan frequency signal generating means 32. , 33, and the capstan frequency signal from the capstan frequency signal generating means 32, 33 is counted by the group detecting means 6 (37), and the plurality of magnetic heads 26, 27 are counted.
Outputs a group detection signal corresponding to the group of all tracks formed when the magnetic tape 28 is scanned once each time, and the group detection signal from the group detection means 6 (37) is output by the counting means 6 (38). Counting is performed, and CT is performed based on the count value output from the counting means 6 (38).
The L signal is generated by the CTL signal generating means 6 (38), and when it is detected that the level of the tracking signal is within the range of the allowable level, the plurality of magnetic heads 26 and 27 are respectively operated once by the magnetic tape. The group number data indicating the group of all the tracks formed when scanning is performed is represented by C
The TL signal generating means 6 (38) is preset by the control means 7 (31). As a result, the time from the detection of the edge of the drum switching pulse to the detection of the track number data coincides with the reference time, and the level of the tracking signal obtained by the predetermined head 26 or 27 becomes an allowable level. , The accurate CTL signal obtained by counting the group detection signal from the value indicated by the group number data is output, and the track number data is detected after the edge of the drum switching pulse is detected. If the time up to is not the reference time, or if the level of the tracking signal is not within the allowable range, the CTL signal obtained by counting the group detection signal without presetting the group number data is used. Can be output.

According to the twenty-eighth aspect, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is defined as the reference time. Reference time comparison means 1
Comparing in (31), the polarity detecting means 3 (31) detects whether or not the polarity of the drum switching pulse is a polarity indicating that it is a scanning period by a predetermined head 26 or 27 of the plurality of heads 26, 27. Then, the tracking signal is extracted by the extracting means 4 (30), and the polarity detecting means 3 (31) is extracted.
When the measured time and the reference time match as a result of the comparison in (2), the level comparison means 5 (31) records the signal together with the recording signal by the predetermined head 26 or 27 detected based on the polarity of the drum switching pulse, The capstan motor 34 compares whether or not the level of the tracking signal extracted by the extracting means 4 (30) from a track adjacent to the recording track to be scanned by the predetermined head 26 or 27 is within an allowable level. The capstan frequency signal corresponding to the rotation of the group is generated by the capstan frequency signal generating means 32 and 33,
According to (37), the capstan frequency signal from the capstan frequency signal generating means 32, 33 is counted, and all tracks formed when the plurality of magnetic heads 26, 27 scan the magnetic tape 28 once each time. , A group detection signal from the group detection means 6 (37) is counted by the counting means 6 (38), and the CTL is output based on the count value output from the counting means 6 (38). A signal is generated by the CTL signal generating means 6 (38), and when the level comparing means 5 (31) detects that the level of the tracking signal is within an allowable level, the plurality of magnetic heads 2
The CTL signal generating means 6 (38) sends the group number data indicating the group of all tracks formed when the magnetic tapes 6 and 27 scan the magnetic tape 28 once each to the control means 7 (38).
Preset by (31). Thereby, the time from the detection of the edge of the drum switching pulse to the detection of the track number data coincides with the reference time, and the level of the tracking signal obtained by the head 26 or 27 during scanning is allowed. If the level is within the range, an accurate CTL signal obtained by counting the group detection signal from the value indicated by the group number data is output, and the track number data is detected after detecting the edge of the drum switching pulse. If the time until the time is not the reference time, or if the level of the tracking signal is not within the range of the allowable level, the CTL signal obtained by counting the group detection signal without presetting the group number data Can be output.

[0074]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

In the description of one embodiment of the CTL signal generation method and apparatus of the present invention, the following item description is described at the head of each item, and each item is described in the following order.

* First Embodiment A. B. Configuration of VTR to which one embodiment of the CTL signal generation method and apparatus of the present invention is applied (see FIG. 2) B. Description of ATF signal (f0, f1, and f2) (see FIG. 3) B. Description of tape format, pseudo CTL signal, and output of track counter (see FIG. 4) E. Explanation of scanning pattern of magnetic track by tape running speed and magnetic head (see FIG. 5) B. Configuration of main parts of one embodiment of the CTL signal generation method and apparatus of the present invention and description of its operation (see FIG. 1) G. Description of operation of main part of one embodiment of CTL signal generation method and apparatus of the present invention (see FIG. 6) Explanation of the state of reading track number data during just tracking and off tracking (see FIG. 7) Explanation of magnetic track scanning pattern by magnetic head using pseudo CTL based on FWD 2x speed and magnetic head scanning start (see FIG. 8) Description of the scanning pattern of the magnetic track by the magnetic head using the pseudo CTL based on the double speed of FWD and the end of scanning of the magnetic head (see FIG. 9) * Second embodiment Explanation when B edge of drum switching pulse SWp is used * Third Embodiment Description when only B head is used * Fourth embodiment Description when both A and B heads are used (FIG. 10)
See M.). Description of operation when both A and B heads are used (see FIG. 11) * Fifth Embodiment FIG. 12 shows an example of the configuration of the main part when the A and B track pairs are counted as one, and the operation thereof (FIG. 12).
See N.C. Description when counting is performed as one in track pairs A and B (see FIG. 13). Description of operation when counting is performed as one track pair in A and B tracks (see FIG. 14) * Sixth Embodiment Description of Three Magnetic Heads * Seventh Embodiment Description of a case where track pair number data is recorded in advance on a magnetic tape and this track pair number data is used * Eighth Embodiment Description of a case in which track number data and track pair number data are recorded in advance on a magnetic tape and both track number data and track pair number data are used * Ninth Embodiment Description when N magnetic heads are used

[First Embodiment]

A. Description of the configuration and operation of a VTR to which an embodiment of the CTL signal generation method and apparatus of the present invention is applied (see FIG. 2)

FIG. 2 is a block diagram showing a VTR to which one embodiment of the CTL signal generation method and apparatus according to the present invention is applied.

[Connection and Configuration] In FIG. 2, reference numeral 20 denotes an input terminal for inputting a video signal to be recorded, and reference numeral 21 denotes an input terminal for inputting an audio signal to be recorded. The video and audio signals supplied via these input terminals 20 and 21 are supplied to a recording signal processing circuit 22.

The recording system signal processing circuit 22
The video and audio signals supplied via A and
The data is converted into digital video and audio data by a D converter. And outer code ECC for the video data
(Error correction code) Processing such as addition and shuffling is performed, and an outer code ECC is added to audio data.
It performs processes such as shuffling, mixes the video data, audio data, synchronization signal, and ID data that have been subjected to these various processes, performs processes such as adding an internal code ECC and channel decoding to the mixed data, , ATF (Automatic Track Fol
1wing) method, an ATF signal for tracking error detection of a different frequency is generated for each track, and the generated ATF signal is subjected to a 24-25 conversion process.
The ATF signal subjected to the -25 conversion process is multiplexed with the data to be recorded, and the multiplexed output is supplied to the amplifier 23.

Here, the ATF signal is, for example, f
0, f1 and f2, and an ATF signal f1
Is 465 KHz, and the frequency of the ATF signal f2 is 6
97 KHz is used.

At the time of recording, the amplifier 23 amplifies the output from the recording signal processing circuit 22 for recording, and supplies this output to the head switching circuit 24. The head switching circuit 24 switches the output from the amplifier 23 based on the drum switching pulse generated by the FG generation circuit 32 and supplied through the amplification circuit 33, so that the recording / reproducing head 2
Signals to be recorded are sequentially supplied to 6 and 27. Thus, a recording track with azimuth is formed on the magnetic tape 28. Hereinafter, the recording / reproducing head 26 is referred to as an A head, and the recording / reproducing head 27 is referred to as a B head.

When the helical track recorded on the magnetic tape 28 is reproduced by the A head 26 and the B head 27, the RF signals reproduced by the A head 26 and the B head 27 are supplied to the head switching circuit 24. The head switching circuit 24 sequentially switches the RF signals supplied from the A head 26 and the B head 27 based on the drum switching pulse and supplies the RF signals to the amplifier 23. The amplifier 23 amplifies the RF signals sequentially supplied from the A head 26 and the B head 27 during reproduction, equalizes the waveform, and
The reproduction data thus obtained is converted into a reproduction signal processing circuit 43.
And to the ATF signal detection circuit 30.

The reproduction-system signal processing circuit 43 performs processing such as channel decoding, synchronization detection, and inner code ECC decoding on the reproduction data supplied from the amplifier 23, and then performs deshuffling and outer processing on the video data. Processing such as code ECC decoding and error concealment is performed, and processing such as deshuffling, outer code ECC decoding and error concealment is performed on audio data. The video data is converted to an analog video signal and output via an output terminal 44, and the audio data is converted to an analog audio signal and output via an output terminal 45.

The reproduction system signal processing circuit 43 supplies the reproduction data subjected to the inner code ECC decoding to the track number detection circuit 29. The track number detection circuit 29
The track number data in the ID data in the reproduction data supplied from the reproduction system signal processing circuit 22 is extracted, and the extracted track number data is supplied to the pseudo CTL microcomputer (microcomputer) 31. Further, the reproduction system signal processing circuit 43 converts the time code in the reproduction data
To supply.

The ATF signal detection circuit 30 extracts the ATF signal from the reproduction data supplied from the reproduction system signal processing circuit 43, detects the level of the extracted ATF signal,
The F level data is supplied to the pseudo CTL microcomputer 31.

The pseudo CTL microcomputer 31 calculates the elapsed time from the edge of the drum switching pulse supplied from the FG generation circuit 32 via the amplifier circuit 33 to the supply of the track number data from the track number detection circuit 29,
Comparison of reference elapsed time, FG generation circuit 32 to amplification circuit 3
3, the detection of the polarity (indicating whether the head is the A head or the B head) of the drum switching pulse supplied through the ATF
Performs signal level detection. When the elapsed time from the edge of the drum switching pulse supplied from the FG generation circuit 32 via the amplifier circuit 33 to the supply of the track number data from the track number detection circuit 29 matches the reference elapsed time. Reads the track number data and presets the read track number data in the track counter 38.

Here, the drum switching pulse has a high level “1” during the period when the A head 26 is used,
The period during which the B head is used is a pulse that becomes low level “0”. In this example, the point (rising) at which the drum switching pulse changes from high level “1” to low level “0” (rising) and the point at which the drum switching pulse changes from low level “0” to high level “1” (falling) are B. The point at which the measurement of the elapsed time until the track number is supplied is started from the A-edge.

The track counter 38 counts the carry signal supplied from the FG counter 37 from the value indicated by the track number data preset by the pseudo CTL microcomputer 31, and when the count value becomes "5". When the count value becomes "10" from the high level "1" to the low level "0", a pulse is output from the low level "0" to the high level "1". In this example, this pulse is referred to as a pseudo CTL signal. This pseudo CTL signal is supplied to the editing machine 50. Here, the editing machine 50 is shown in the figure as an example for explaining a method of using the pseudo CTL signal, and the editing machine 50 transmits a time signal from the reproduction system signal processing circuit 43 in a phase adjustment operation at the time of editing. If the code cannot be obtained, the pseudo CTL signal from the track counter 38 is used.

That is, in this example, the track counter 3
When the value indicated by the track number data preset to 8 is "1" to "5", the pseudo CTL signal output from the track counter 38 becomes high level "1",
When the count value counted by the track counter 38 becomes “5”, the pseudo CTL signal changes from high level “1” to low level “0”.

On the other hand, the value indicated by the track number data preset in the track counter 38 changes from “6” to “1”.
In the case of "0", the pseudo CTL signal output from the track counter 38 becomes low level "0", and when the count value counted by the track counter 38 becomes "10", the pseudo CTL signal becomes low level "0". "To" 1 ".

The FG counter 37 counts the capstan motor frequency signal supplied from the FG generation circuit 35 via the amplification circuit 36, and the count value is, for example, “3”.
When it becomes 2 ", a carry signal is generated and the carry signal is supplied to the track counter 38. Here, F
The G generation circuit 35 generates two frequency signals whose phases are different from each other by 90 degrees by the rotation of the capstan motor 34. In addition, in the figure, it shows with the single line. FG
The counter 37 is supplied with a capstan motor frequency signal whose phase is advanced among the two capstan motor frequency signals having different phases.

On the other hand, the two capstan motor frequency signals are supplied to the speed detection circuit 39 and the phase detection circuit 40, respectively. The speed detection circuit 39 detects the rotation speed of the capstan motor 34 using the capstan frequency signals having phases different from each other by 90 degrees and supplied from the FG generation circuit 35. Further, the phase detection circuit 40 includes an FG generation circuit 35.
The phase of the two capstan frequency signals supplied from is detected.

The rotation speed data of the capstan motor 34 obtained by the speed detection circuit 39 and the phase data obtained by the phase detection circuit 40 are supplied to a capstan control microcomputer (microcomputer) 41, respectively. The capstan control microcomputer 41 determines the capstan motor 34 based on the speed data of the capstan motor 34 from the speed detection circuit 39 and the phase data supplied from the phase detection circuit 40.
The driving data for driving is output. This drive data is supplied to the capstan motor 34 via the amplifier circuit 42.

[Recording Operation] Video and audio signals are supplied to the recording-system signal processing circuit 22 via the input terminals 20 and 21. In the recording system signal processing circuit 22, the video and audio signals are converted into digital video and audio data by an AD converter, respectively. The video data converted to digital data is subjected to processing such as addition of an outer code ECC (error correction code) and shuffling.
Processing such as C addition and shuffling is performed.

The video data and the audio data subjected to the various processes are mixed with the synchronization signal and the ID data, and the mixed data is subjected to processes such as addition of an inner code ECC and channel decoding. Then, the ATF signal subjected to the 24-25 conversion processing is multiplexed with the recording signal subjected to these processings, and the data multiplexed with the ATF signal is supplied to the head switching circuit 24 via the amplifier 23.

The data supplied to the head switching circuit 24 is switched by the FG generation circuit 32 based on the drum switching pulse supplied through the amplification circuit 33, and is sequentially supplied to the A head 26 or the B head 27. Is done. Thus, a recording track with azimuth is formed on the magnetic tape 28.

[Reproduction Operation] The magnetic tape 28 is run by a reel motor and a capstan motor 34 (not shown), and the rotating drum 25 is rotated by a drum motor (not shown). Then, the magnetic tracks formed on the magnetic tape 28 are sequentially scanned by the B head 27.

The RF signals of the magnetic tracks reproduced by the A head 26 and the B head 27 are supplied to a head switching circuit 24, where the drum switching supplied from an FG generation circuit 32 via an amplification circuit 33 is performed. The pulse is selectively supplied to the amplifier 23.

The RF signal supplied to the amplifier 23 is amplified,
After the waveform is equalized, it is supplied to the ATF signal detection circuit 30 and the reproduction system signal processing circuit 43, respectively. The reproduction data supplied to the reproduction-system signal processing circuit 43 is subjected to processes such as channel decoding, synchronization detection, and inner code ECC decoding.
Processing such as CC decoding and error concealment is performed, and audio data is deshuffled, outer code ECC decoded,
Processing such as error concealment is performed. Video data is D
After being converted into an analog video signal by the A-A converter, it is output via the output terminal 44, and the audio data is
After being converted into an analog audio signal by the A converter, it is output via the output terminal 45.

The reproduced data subjected to the inner code ECC decoding is supplied to a track number detecting circuit 29, where the track number data in the ID data is extracted. The extracted track number data is supplied to the pseudo CTL microcomputer (microcomputer) 31.

On the other hand, from the reproduction data supplied to the ATF signal detection circuit 30, an ATF signal is extracted and its level is detected. The ATF level data obtained by this detection is supplied to the pseudo CTL microcomputer 31.

In the pseudo CTL microcomputer 31, FG
The elapsed time from the edge of the drum switching pulse supplied from the generation circuit 32 via the amplifier circuit 33 to the supply of the track number data from the track number detection circuit 29 is compared with the reference elapsed time. The track number data is read. Subsequently, the polarity (indicating whether the head is an A head or a B head) of the drum switching pulse supplied from the FG generation circuit 32 via the amplification circuit 33 is detected. As a result of the detection of the polarity, the A head 26 is detected.
, The level of the ATF signal is detected. ATF signal f1 level and ATF
If the levels of the signals f2 are equal and these levels are within the target value, the read track number data is preset in the track counter 38.

On the other hand, the FG counter 37 counts the capstan motor frequency signal supplied from the FG generation circuit 35 via the amplification circuit 36. When the count value becomes, for example, “32”, the carry signal is output. The generated carry signal is supplied to the track counter 38. In the track counter 38, the carry signal supplied from the FG counter 37 is counted from the track number data preset by the pseudo CTL microcomputer 31, whereby a pseudo CTL signal is obtained, and the pseudo CTL signal is supplied to the editor 50. Is done.

The two capstan motor frequency signals are supplied to a speed detection circuit 39 and a phase detection circuit 40, respectively.
The rotation speed of the capstan motor 34 is detected by using the capstan frequency signals having a phase difference of 90 degrees from each other supplied from the control unit 5. In the phase detection circuit 40, the phases of the two capstan frequency signals supplied from the FG generation circuit 35 are detected.

The rotation speed data of the capstan motor 34 obtained by the speed detection circuit 39 and the phase data obtained by the phase detection circuit 40 are supplied to a capstan control microcomputer (microcomputer) 41, respectively. In the capstan control microcomputer 41, the speed data of the capstan motor 34 from the speed detection circuit 39 and the phase detection circuit 4
Drive data for driving the capstan motor 34 is output based on the phase data supplied from 0. This drive data is supplied to the capstan motor 34 via the amplifier circuit 42.

B. Description of ATF signals (f0, f1, and f2) (see FIG. 3)

FIG. 3 is a diagram for explaining the ATF signal.
FIG. 9 is a diagram illustrating a frequency spectrum of a code string after the −25 conversion, in which the vertical axis represents dB and the horizontal axis represents frequency. In the figure, F0 is F0 track, F1 is F
Track 1 and F2 are F2 tracks f0, f1 and f2 respectively represent frequency signals f0, f1 and f2, and Pf1 and Pf
Reference numeral 2 denotes a pilot signal.

In this example, without generating a pilot signal on the track F0, the frequency f is applied to each of the tracks F1 and F2.
1 and f2 of pilot signals Pf1 and Pf2. The frequency dip DIP1 of the track F0 is 9
The frequency DIP of the track F1 and the frequency DIP of the track F2 are 3 dB or more, respectively.
L1 and L2 are each 16 to 19 dB. Also, fb
If f = 41.85 MHz, f1 = fb / 90 = 465K f2 = fb / 60 = 697K

The recording tracks as described above are recorded on the magnetic tape so as to be arranged in the order of the tracks F0, F1, and F2. In this way, when the head scans the track F0, the magnitude of the pilot signal leaking from the adjacent track can be detected. By controlling this to be constant, the head can correctly move the recording track. Scanning can be enabled.

C. Explanation of tape format, pseudo CTL signal and output of track counter (see FIG. 4)

FIG. 4 is an explanatory diagram for explaining an example of the tape format and the pseudo CTL signal and the output of the track counter.

In the figure, SWp is a switching pulse,
By1 is the scanning direction of the A and B heads 26 and 27;
2 is the running direction of the magnetic tape 28, Pctl is the pseudo CTL
The signal Cout is a carry signal output from the FG counter 38 and corresponds to one track. Also, f0, f1, and f2 shown above each recording track in the figure.
Indicates an ATF signal, a numeral shown below each recording track indicates a track number, A shown in each recording track indicates that scanning is performed by the A head 26, and is shown in each recording track. B indicates that scanning is performed on the B track 27.

The A head 26 is indicated by a thick solid line in track number 1. In the figure, the drum switching pulse SWp indicates a period during which the A head 26 scans a recording track. The direction of the drum switching pulse SWp shown in the drawing is from the bottom to the top in the drawing. Therefore, the A edge of the drum switching SWp is
This is the lower rising portion in the figure.

This example shows the case of the NTSC system.
The figure shows a case where one frame is composed of 10 tracks (in the PAL system, one frame is composed of 12 tracks). Tracking methods using ATF signals include A
With reference to the ATF signal f0 reproduced by the head 26, the magnitudes of the frequencies of the ATF signals f1 and f2 of the adjacent tracks are compared. That is, the level of the ATF signal f1, the level of the ATF signal f2, and the storage unit 8 shown in FIG.
It is determined whether or not the reference ATF levels stored in.

Here, it is assumed that the reference ATF level is just tracking when f1 = f2 (| f1-f2 | ≦ α), for example. The most appropriate value of α can be selected by measuring f1 and f2 when the track is just track.

In this embodiment, the frequency of the ATF signals f1 and f2 is compared only when the A head 26 scans the recording track indicated by the diagonal lines, and the B head 27 determines the recording tracks that are not shaded in the drawing. A when scanning
The TF signal is not compared. Therefore, the following description focuses on the A head 26.

D. Explanation of the tape running speed and the scanning pattern of the magnetic track by the magnetic head (see FIG. 5)

FIG. 5 is an explanatory diagram for explaining the tape running speed and the scanning pattern of the magnetic track by the A head 26. 5, parts corresponding to those in FIG. 4 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the figure, STL indicated by a thick solid line indicates the scanning trajectory of the A head 26 during still reproduction, FWD1 indicated by a thick solid line indicates the scanning trajectory of the A head 26 during normal speed 1 × speed reproduction, and FWD2 indicated by a thick solid line. Indicates scanning trajectories of the A head 26 at the time of double speed in the forward direction.

As can be seen from this figure, at the time of still reproduction, the A head 26 has a recording track of track number "1" and a recording track of track number "2", which is one track ahead of the track of track number "1". Scan across the recording tracks. Also, at the time of normal speed 1 × speed reproduction, the A head 2
Numeral 6 scans the recording track of track number "5" in the just track state. At the time of normal speed double speed reproduction, the A head 26 should scan the recording track of the track number “9”. However, the track number “8” which is one before the recording track of the track number “9” is required. The scanning is performed over the recording track of "" and the recording track of track number "9".

E. Description of Configuration and Operation of Main Part of One Embodiment of CTL Signal Generation Method and Apparatus of the Present Invention (see FIG. 1)

FIG. 1 is a configuration diagram showing an example of the configuration of a main part of an embodiment of the CTL signal generation method and apparatus according to the present invention.

[Connection and Configuration] In the figure, reference numeral 1 denotes a reference time comparison unit having a timer for comparing the time from when the edge of the drum switching pulse is detected to when the track number data is supplied with the reference time. Reference numeral 2 denotes a track number reading unit for reading a track number from the ID data of the reproduction data, 3 a polarity detection unit for detecting the polarity of the drum switching pulse, and 4 an ATF signal from the reproduction data supplied from the amplifier 3 AT
An F detector 5, a level detector 5 for detecting whether or not the levels of the ATF signals f1 and f2 are within a reference level range, a pseudo CTL generator 6 for generating a pseudo CTL, and a reference time 8 Reference time data used in the comparison unit 1;
A storage unit for storing the read track number data and reference level data, 9 is an input terminal for inputting reproduction data, 10 is an input terminal for inputting a drum switching pulse, and 11 is an input terminal from the amplifier 23. An input terminal to which reproduction data is supplied, 12 is an input terminal to which a capstan motor frequency signal supplied from the FG generation circuit 35 shown in FIG. 2 via the amplification circuit 36 is supplied, and 13 is a pseudo CTL signal is output. Output terminal.

The reference numeral 7 writes the reference time data, the track number data and the reference level data into the storage section 8 and reads out the data written from the storage section 8, and the reference time comparison section 1 and the track number reading section. 2, polarity determination unit 3, ATF detection unit 4, level detection unit 5,
The control unit controls the pseudo CTL generation unit 6.

Here, the reference time comparison section 1, the polarity detection section 3, the level detection section 5, the control section 7, and the storage section 8 correspond to the pseudo CTL microcomputer 31 shown in FIG. Further, the track number reading section 2 is provided to the track number detecting circuit 29 shown in FIG.
Indicates that the ATF signal detection circuit 30 shown in FIG.
The TL generator 6 corresponds to the track counter 38 and the FG counter 37 shown in FIG.

[Operation] Reproduction data is supplied to the control unit 7 through the input terminal 9, and a drum switching pulse is supplied to the control unit 7 through the input terminal 10. When the drum switching pulse is supplied via the input terminal 10, the reference time comparison unit 1 starts counting the timer A from the time when the drum switching pulse detects the A edge at which the drum switching pulse changes from high level "1" to low level "0". Measurement of the elapsed time is started.

On the other hand, the track number reading section 2 detects the track number data in the ID data of the reproduction data supplied via the input terminal 9. Then, when the track number data is detected, data indicating that the track number data has been detected is supplied to the reference time comparison unit 1.
The reference time comparison unit 1 stops the timer that is measuring, compares the elapsed time data at that time with the reference time data read from the storage unit 8, and determines that the value indicated by the measured elapsed time data is It is determined whether or not the values indicating the reference time data match, and when they match, data indicating that fact is supplied to the control unit 7.

When the control unit 7 recognizes that the value indicated by the elapsed time data measured from the reference time comparison unit 1 matches the value indicating the reference time data, the track number reading unit 2 reads the track number data. Tell them to do it. Thus, the track number reading unit 2 reads the track number data in the ID data of the input reproduction data.

Next, the polarity detector 3 determines the polarity of the drum switching pulse supplied via the input terminal 9, that is,
Whether the drum switching pulse is high level “1” or low level “0” is detected, and when it is determined that the drum switching pulse is high level “1”, the drum switching pulse is high level “1”, that is, A head 2
Data indicating that the scanning period is 6 is supplied to the control unit 7. Further, the ATF detection unit 4 extracts an ATF signal in the reproduction data supplied via the input terminal 11 and supplies the extracted ATF signal to the level detection unit 4 via the control unit 7.

If the data supplied from the polarity detector 3 is data indicating that the drum switching pulse is at a high level "1", the controller 7 instructs the level detector 5 to perform level detection. I do. The level detection circuit 5 detects the level of the ATF signal supplied from the ATF detection circuit 4 and determines whether the level of the detected ATF signal is within the range of the ATF reference level read from the storage unit 8. When the level of the detected ATF signal is AT
If it is determined that it is within the range of the F reference level, data indicating that fact is supplied to the control unit 7.

On the other hand, when the track number data is supplied from the track number reading section 2, the control section 7 stores the track number data in the storage section 8 and stores the track number data in the pseudo CTL generating section 6. Supply and preset. The pseudo CTL generation unit 6 counts the capstan motor frequency signal supplied from the FG generation unit 35 shown in FIG. 2 via the input terminal 12 via the amplification circuit 36, and the count value becomes “32”. The carry signal obtained at the time of counting is counted from the value indicated by the track number data preset by the control unit 7. When the count value becomes "5", the pseudo CTL signal is changed from high level "1" to low level "0". When the count value becomes "10", the pseudo CTL signal is changed to low level. From “0” to high level “1”.

F. Description of Operation of Main Part of One Embodiment of CTL Signal Generation Method and Apparatus of the Present Invention (see FIG. 6)

FIG. 6 is a flow chart for explaining the operation of the main part of one embodiment of the CTL signal generating method and apparatus according to the present invention.

In step S1, it is determined whether or not the elapsed time from the A edge of the switching pulse SWp of the rotating drum 25 to the reading of the track number data is a reference time. If "YES", the flow shifts to step S2. "N
If "O", the process ends. That is, in this step S1, the reference time comparison unit 1 shown in FIG.
Start the internal timer when the edge is detected,
The time measurement is started, and the time measurement is terminated by the control signal supplied from the control unit 7 when the track number reading unit 2 reads the track number data. And
The elapsed time data obtained by the measurement is compared with the reference time data read from the storage unit 8, and the elapsed time data is compared with the reference time data.
It is determined whether or not the reference time data matches.

In step S2, track number data is read. Then, control goes to a step S3. That is, in step S2, the track number reading unit 2 reads the track number data from the ID data of the reproduction data supplied via the input terminal 9, and supplies the read track number data to the control unit 7. The control unit 7 supplies the track number data supplied from the track number reading unit 2 to the storage unit 8 and stores it.

In step S3, it is determined whether or not the channel is the A channel. If "YES", the flow shifts to step S4 to select "N".
If "O", the process ends. That is, in this step S3, the drum switching pulse supplied via the input terminal 10 is detected, and it is determined whether or not the current period is the scanning period of the A head 26.

In step S4, it is determined whether or not the ATF signals f2 and f1 are the target values.
Then, if "NO", the process ends. That is, in this step S4, first, the ATF detector 4 extracts the ATF signals f2 and f1 in the reproduction data supplied from the amplifier 23 shown in FIG. Next, the level detection unit 5 stores the levels of the ATF signals f2 and f1 extracted by the ATF detection unit 4 and the storage unit 8
Is detected as to whether or not the levels indicated by the reference ATF level data read from are equal.

In step S5, it is determined whether or not the track number has been read. If "YES", the process shifts to step S6, and if "NO", the process ends. That is, in step S5, the control unit 7 determines whether the track number reading unit 2 has read the track number data.

In step S6, the track number data is preset in the pseudo CTL generator 6. And it ends.
That is, in step S6, the control unit 7
Is preset in the pseudo CTL generator 6. The pseudo CTL signal generation unit 6
When the number of pulses of the capstan motor frequency signal supplied through the input terminal 12 is counted "32", one pulse is generated, and this pulse is counted from the value indicated by the preset track number data. When the count value becomes "5", the pseudo CTL signal output from the output terminal 13 is changed from high level "1" to low level "0", and when the count value becomes "10", the pseudo-CTL signal is output. The pseudo CTL signal output from the terminal 13 is changed from low level "0" to high level "1".

As already described with reference to FIG. 2, in the present embodiment, the pseudo CTL generator 6 is
And a track counter 38. Therefore, in this case, the FG counter 37 counts the capstan motor frequency signal supplied from the FG generator 35 via the amplifier circuit 36, and when the count value becomes “32”, the FG counter 37 starts counting. The carry signal is output, and the track counter 38 counts the carry signal supplied from the FG counter 37 from the value indicated by the preset track number data, and when the count value becomes “5” as described above. The pseudo CTL signal output from the output terminal 13 is changed from high level "1" to low level "0".
When the count value becomes "10", the pseudo CTL signal output from the output terminal 13 is changed from low level "0" to high level "1".

G. Explanation of the read state of the track number data during just tracking and off tracking (see FIG. 7)

FIG. 7 is an explanatory diagram for explaining a reading state of the track number data at the time of so-called just tracking and at the time of off-tracking. In the figure, parts corresponding to those in FIGS. 4 and 5 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the figure, JUST indicates a scanning trajectory (shown by a thick solid line in the figure) of the A head 26 where the A head 26 scans the recording track in the just tracking state, and OFF1 indicates the scanning in the off track state. A
The scanning locus of the head 26 (shown by a thick solid line in the figure) is shown.
OFF2 indicates a scanning trajectory (shown by a thick solid line in the figure) of the A head scanning in an off-track state.

In the just tracking state, as shown in the figure, the scanning trajectory JUST of the A head 26 accurately scans the recording track. Therefore, as shown in the figure, the track with the track number “10” and the track with the track number “2” adjacent to the track with the track number “2”
The levels of the ATF signals f2 and f1 obtained from the respective tracks are equal to each other. Therefore, in this case, the track number data can be read.

On the other hand, in the off-track state, as shown in the figure, the scanning trajectory OFF1 of the A head 26 does not accurately scan the recording track. Then, as can be seen from the scanning locus OFF1 of the A head 26, the A head 2
Numeral 6 scans the majority of the track with the track number "4" and scans some of the entire area of the track with the track number "5". Therefore, as shown in the figure, the relationship between the levels of the ATF signals f2 and f1 obtained from the track with the track number “4” and the track with the track number “6” adjacent to the track with the track number “5” is A As shown in the parentheses attached to the scanning trajectory OFF1 of the head 26, the level of the ATF signal f2> the level of the ATF signal f1.

The scanning trajectory of the A head 26 is turned off.
In the case of off-track as shown by 1, the A head 26
Scans the track to be scanned by the B head 27, not the track to be scanned (the hatched track in the figure), but the azimuths of the A head 26 and the B head 27 are opposite to each other. It is configured as
The track number data is not read from the track to be scanned by the B head 27.

In the other off-track state, as shown in FIG.
Does not accurately scan the recording track. As can be seen from the scanning locus OFF2 of the A head 26, the A head 26 scans a small area of the entire area of the track with the track number "9". Accordingly, as shown in FIG.
Track number "8" and track number "1"
ATF signals f2 and f obtained from track 0 ", respectively.
The relationship of level 1 is that the scanning locus of the A head 26 is OFF2
, The level of the ATF signal f2 <the level of the ATF signal f1.

The scanning trajectory of the A head 26 is turned off.
In the case of off-track as shown by 2, the A head 26
Scans the track to be scanned by the B head 27, not the track to be scanned (the hatched track in the figure), but the azimuths of the A head 26 and the B head 27 are opposite to each other. It is configured as
The track number data is not read from the track to be scanned by the B head 27.

H. Description of the scanning pattern of the magnetic track by the magnetic head using the pseudo CTL based on the FWD 2 × speed and the start of the magnetic head scanning (see FIG. 8)

FIG. 8 is an explanatory diagram for explaining a scanning pattern of a magnetic track by a magnetic head using pseudo CTL at the time of double-speed FWD at the start of magnetic head scanning (reference to the entrance of the drum). 4 and FIG.
The same reference numerals are given to portions corresponding to FIG. 7 and FIG.

When the running speed of the magnetic tape 28 is set to double the FWD speed and the start of scanning of the A head 26 is used as a reference, the scanning trajectory of the A head 26 first has a track number as shown by a thick solid line in the figure. Scans an odd-numbered track and then a track immediately before this track, which has an even-numbered track number.

The reference time comparing section 1 shown in FIG. 1 measures the elapsed time from the A edge (lower rising portion in the figure) of the drum switching pulse SWp until the track number reading section 2 can read the track number. The elapsed time thus obtained is compared with a reference time t0 shown in FIG. 1 (stored in the storage unit 8 in FIG. 1).

When they match, the track number reading unit 2 reads the track number data, and the polarity detecting unit 3 detects the polarity of the drum switching pulse SWp. Recognizing that it is a scanning period, A
The levels of the ATF signal f1 and the ATF signal f2 detected by the TF detection unit 4 are compared with the reference ATF level read from the storage unit 8, respectively.

That is, the level of the ATF signal f1 and the ATF
The level detector 5 compares whether the level of the signal f2 is equal and these levels are equal to the reference ATF level. As a result, when it is judged that these levels are equal to each other, the track number reader 2 reads the signals. The preset track number data is preset in the track counter 38 shown in FIG.

On the other hand, the FG counter 37 shown in FIG.
The capstan motor frequency signal supplied from the FG generation circuit 35 via the amplification circuit 36 is counted, and when the count value becomes "32", one pulse outputs a carry signal corresponding to one track. . This carry signal is supplied to the track counter 38.

Accordingly, as shown in the figure, the carry signal Cout, which is the output of the track counter 38, rises when the reference time t0 has elapsed since the A head 26 started scanning the track, and the B head started scanning the track. The output falls when the reference time t0 elapses from the time t. On the other hand, the track counter 38 has an FG counter 37.
Is counted from the value indicated by the preset track number data, and when the count value becomes "5", the pseudo CTL signal Pctl is changed from high level "1" to low level "0". When the count value becomes “10”, the pseudo CTL signal Pctl
From a low level “0” to a high level “1”.

That is, as shown in the figure, the pseudo CTL signal Pctl changes from low level “0” to high level “1” at the rise of the carry signal Cout corresponding to track number “1”, and changes to track number “5”. The fall of the corresponding carry signal Cout, that is, the fall of the carry signal Cout corresponding to the track number “6”.

Accordingly, when the entrance of the rotary drum 25 on which the magnetic tape 28 is running at double speed of FWD is set as a reference, the pseudo CTL signal Pctl is recorded on the magnetic tape 28 by mounting the CTL head, Is substantially the same as the timing of the CTL signal obtained at the time of reproduction. Therefore, even if the VTR is not equipped with a CTL head, the CTL obtained with the VTR equipped with a CTL head can be obtained.
A pseudo CTL signal Pctl substantially similar to the signal can be obtained.

I. Description of the scanning pattern of the magnetic track by the magnetic head using the pseudo CTL based on the double speed of FWD and the end of scanning of the magnetic head (see FIG. 9)

FIG. 9 is an explanatory diagram for explaining a scanning pattern of the magnetic track by the magnetic head using the pseudo CTL when the scanning of the magnetic head is completed at the double speed of FWD (drum exit reference). In the figures, FIG. 4, FIG.
7 and 8 are denoted by the same reference numerals, and detailed description thereof will be omitted.

When the traveling speed of the magnetic tape 28 is set to double the FWD speed and the end of scanning of the A head 26 is used as a reference, the scanning trajectory of the A head 26 first has a track number as shown by a thick solid line in FIG. Is an even track, and then a track immediately before this track, that is, a track having an odd track number.

The reference time comparing section 1 shown in FIG. 1 measures the elapsed time from the A edge (lower rising portion in the figure) of the drum switching pulse SWp until the track number reading section 2 can read the track number. The elapsed time thus obtained is compared with a reference time t1 shown in the figure (stored in the storage unit 8 in FIG. 1).

When they match, the track number reading unit 2 reads the track number data, and the polarity detecting unit 3 detects the polarity of the drum switching pulse SWp. Recognizing that it is a scanning period, A
The levels of the ATF signal f1 and the ATF signal f2 detected by the TF detection unit 4 are compared with the reference ATF level read from the storage unit 8, respectively.

That is, the level of the ATF signal f1 and the ATF signal
The level detector 5 compares whether the level of the signal f2 is equal and these levels are equal to the reference ATF level. As a result, when it is judged that these levels are equal to each other, the track number reader 2 reads the signals. The preset track number data is preset in the track counter 38 shown in FIG.

On the other hand, the FG counter 37 shown in FIG.
The capstan motor frequency signal supplied from the FG generation circuit 35 via the amplification circuit 36 is counted, and when the count value becomes "32", one pulse outputs a carry signal corresponding to one track. . This carry signal is supplied to the track counter 38.

Accordingly, as shown in the figure, the carry signal Cout, which is the output of the track counter 38, rises when the reference time t1 has elapsed since the A head 26 started scanning the track, and the B head started scanning the track. The output falls when the reference time t1 elapses from the time t1. On the other hand, the track counter 38 has an FG counter 37.
Is counted from the value indicated by the preset track number data, and when the count value becomes "5", the pseudo CTL signal Pctl is changed from high level "1" to low level "0". When the count value becomes “10”, the pseudo CTL signal Pctl
From a low level “0” to a high level “1”.

That is, as shown in the figure, the pseudo CTL signal Pctl changes from the low level “0” to the high level “1” at the rise of the carry signal Cout corresponding to the track number “1” and changes to the track number “5”. The fall of the corresponding carry signal Cout, that is, the fall of the carry signal Cout corresponding to the track number “6”.

[0170] Therefore, when the outlet of the rotary drum 25 which is running the magnetic tape 28 at double speed of FWD is used as a reference, the pseudo CTL signal Pctl is recorded on the magnetic tape 28 with the CTL head mounted thereon. Is substantially the same as the timing of the CTL signal obtained at the time of reproduction. Therefore, even if the VTR is not equipped with a CTL head, the CTL obtained with the VTR equipped with a CTL head can be obtained.
A pseudo CTL signal Pctl substantially similar to the signal can be obtained.

As described above, in this embodiment, the drum switching pulse S supplied through the input terminal 10 is used.
The reference time comparison unit 1 stores the elapsed time from the detection of the A edge of Wp to the detection of the track number data in the ID data of the reproduction data supplied via the input terminal 9 by the track number reading unit 2. The track number data is read by the track number reading unit 2 when the measured elapsed time and the reference time match with the reference time data read from the unit 8 and the drum switching pulse SW
The polarity of p is detected, and whether or not that period is the scanning period of the A head 26 is detected. When it is detected that the period is the scanning period of the A head 26, the level detection circuit 4 outputs the signal through the input terminal 11 via the input terminal 11. Comparing the levels of the ATF signals f2 and f1 extracted by the ATF detection unit 4 from the supplied reproduction data with the reference ATF level data read from the storage unit 8,
When the level of the extracted ATF signal f2, the level of the ATF signal f1, and the reference ATF level data are all equal, it is detected whether or not the track number reading unit 2 has read the track number data, and the track number data is read. In this case, the track number data is preset in the pseudo CTL generator 6, and the pseudo CTL generator 6 counts one track every “32” with the capstan motor frequency signal supplied via the input terminal 12. The track is counted from the preset value, and a pseudo CTL signal which becomes high level "1" or low level "0" every time "5" is counted is recorded by a CTL head and output as a reproduced CTL signal. So that even a VTR without a CTL head At the time of reproduction other than 1x speed running (for example, FWD 2x speed reproduction, REV 2x speed reproduction, etc.) that makes it impossible to read data, various processes using the pseudo CTL signal, such as editing, can be performed, and time code correction is used. For use in existing remote controllers that can be used by outputting as a CTL signal to an external signal, so-called pseudo C in AB roll editing etc.
Use of TL signal, DT (dynamic tracking)
It can be used as control information when controlling the head.

Accordingly, it is possible to cope with the linear search and the phase adjustment which are frequently performed at the time of editing, and it is possible to prevent the free run state even during the speed change period.
Can be satisfactorily reproduced even with the use of, and furthermore, position information can be obtained more accurately, that is, a highly accurate pseudo CTL signal can be obtained.

Since the track number data is used in the process of generating the pseudo CTL signal, the accuracy of the pseudo CTL signal can be greatly improved. Further, in this example, one frame is composed of 10 tracks, and track number data is added to each track,
Since the pseudo CTL signal is generated using the added track number data, the accuracy of the pseudo CTL signal is improved by the division.

[Second Embodiment] Description when using B edge of drum switching pulse SWp

In the first embodiment, the elapsed time from when the reference time comparing section 1 shown in FIG. 1 detects the A edge of the drum switching pulse SWp to when the track number data in the ID data of the reproduction data is read. And measure
The case where comparison is made with the reference time data stored in the storage unit 8 has been described. However, after the reference time comparison unit 1 shown in FIG. 1 detects the B edge of the drum switching pulse SWp, the ID of the reproduction data is obtained. The elapsed time until the track number data in the data is read may be measured and compared with the reference time data stored in the storage unit 8.

Even in the case where the B edge of the drum switching pulse SWp is used, as in the first embodiment,
The same effect as when the A edge of the drum switching pulse SWp is used can be obtained, and the configuration is also the same as that of the first embodiment.

[Third Embodiment] Explanation when only B head is used

In the first embodiment, the A head 26
The ATF signal f0 is recorded on the track scanned by the A head, the ATF signals f2 and f1 are recorded on the tracks adjacent to the track scanned by the A head 26, and the level detection of the ATF signal is performed by the A head 26. Although the case of performing only with the obtained ATF signal has been described,
The ATF signal f0 may be recorded on the track scanned by the B head 27, and the ATF signals f2 and f1 may be recorded on tracks adjacent to the track scanned by the B head 27, respectively.

The track scanned by the B head 27 has an AT
The effect obtained when the F signal f0 is recorded and the ATF signals f2 and f1 are recorded on tracks adjacent to the track scanned by the B head 27, respectively, is the same as that of the first embodiment. The configuration for realizing the example is the same as that of the first embodiment.

[Fourth Embodiment] Description when both A and B heads are used (FIG. 10)
reference)

In the first embodiment, the A head 26
The ATF signal f0 is recorded on the track scanned by the A head, the ATF signals f2 and f1 are recorded on the tracks adjacent to the track scanned by the A head 26, and the level detection of the ATF signal is performed by the A head 26. Although the case of performing only with the obtained ATF signal has been described,
ATF signals f0 and f2 are recorded on the track scanned by the A head 26, and ATF signals are recorded on the track scanned by the B head 27.
The TF signals f1 and f3 may be recorded. Other configurations and the like are the same as those described in the first embodiment.

The hardware configuration in this case is the same as that shown in FIG.
When the A head 26 scans a track in the TF detector 4, the ATF signal f1 and the ATF signal f3
When the level of the extracted ATF signal f1 and the level of the extracted ATF signal f3 are detected by the TF detecting section 4 and the level of the ATF signal f3 is detected by the
The F signal f0 and the ATF signal f2 are extracted by the ATF detector 4, and the level of the extracted ATF signal f0 and the ATF signal f2
May be detected by the level detection unit 5. Other configurations and the like are the same as those described in the first embodiment.

Hereinafter, the reading state of the track number data at the time of just tracking and at the time of off-tracking when the third embodiment is applied will be described with reference to FIG. In the figure, parts corresponding to those in FIG. 7 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the figure, JUST1 is the A head 26
Indicates the scanning locus of the A head 26 scanning the recording track in the just tracking state (shown by a thick solid line in the figure).
JUST2 indicates the A head 2 in which the B head 27 scans the recording track in the just tracking state.
7 shows the scanning locus (indicated by the thick solid line in the figure), and OFF3
Indicates the scanning locus of the A head 26 scanning in the off-track state (shown by a thick solid line in the figure), and OFF4 indicates the scanning locus of the A head scanning in the off-track state (shown by a thick solid line in the figure). ).

Also, as shown in FIG.
ATF signals f0 and f2 are alternately recorded on the track scanned by the.
The ATF signals f1 and f3 are recorded alternately.

In the just tracking state, as shown in the figure, the scanning trajectory JUST1 of the A head 26 is accurately scanning the recording track. Therefore, as shown in FIG.
The levels of the ATF signals f3 and f1 obtained from the track with the track number "10" and the track with the track number "2" are equal to each other. Therefore, in this case, the track number data can be read.

In the state of just tracking,
As shown in the figure, the scanning locus JUST2 of the B head 27
Scans the recording track accurately. Therefore, as shown in the figure, the ATF signal f0 obtained from the track with the track number “1” and the track with the track number “3” adjacent to the track with the track number “2”, respectively.
And f2 are equal to each other. Therefore, in this case, the track number data can be read.

On the other hand, in the off-track state, as can be seen from the scanning locus OFF3 of the A head 26 shown in FIG.
The head 26 does not scan the recording track accurately. As can be seen from the scanning locus OFF3, the A head 26 scans most of the track with the track number "4" and scans a small area of the entire area of the track with the track number "5". Accordingly, as shown in the figure, the relationship between the levels of the ATF signals f3 and f1 obtained from the track with the track number "4" and the track with the track number "6" adjacent to the track with the track number "5" is A As shown in parentheses attached to the scanning trajectory OFF3 of the head 26, the level of the ATF signal f3> the ATF signal f
1 level.

The scanning trajectory OFF3 of the A head 26
In the case of off-tracking as indicated by, the A head 26 scans not the track to be scanned originally (the hatched track in the figure) but the track to be scanned by the B head 27. And B head 27 are configured such that their azimuths are opposite to each other.
The track number data is not read from the track to be scanned by the head 27.

In the other off-track state, as shown in FIG.
As can be seen from FIG. 7, the A-head 26 does not scan the recording track accurately. Then, as can be seen from the scanning trajectory OFF4 of the A head 26, the A head 26 scans a small area of the entire area of the track of track number "9", and scans the entire area of the track of track number "10". Most areas are scanned. Therefore, as shown in the figure,
The relationship between the levels of the ATF signals f3 and f1 obtained from the track with the track number "8" and the track with the track number "10" adjacent to the track with the track number "9" is attached to the scanning locus OFF4 of the A head 26. As shown in parentheses, the level of the ATF signal f3 <the level of the ATF signal f1.

The scanning trajectory of the A head 26 is turned off.
In the case of off-track as shown by 2, the A head 26
Scans the track to be scanned by the B head 27, not the track to be scanned (the hatched track in the figure), but the azimuths of the A head 26 and the B head 27 are opposite to each other. It is configured as
The track number data is not read from the track to be scanned by the B head 27.

On the other hand, in the off-track state, as can be seen from the scanning trajectory OFF5 of the B head 27 shown in FIG.
The head 27 does not scan the recording track accurately. As can be seen from the scanning trajectory OFF5, the B head 27 scans most of the track with the track number "7" and scans some of the entire area of the track with the track number "8". Therefore, as shown in the figure, the relationship between the levels of the ATF signals f2 and f0 obtained from the track with the track number “7” and the track with the track number “9” adjacent to the track with the track number “8” is B As shown in the brackets attached to the scanning trajectory OFF5 of the head 27, the level of the ATF signal f2> the ATF signal f
The level is 0.

The scanning locus OFF5 of the B head 27
In the case of the off-track as shown by, the B head 27 scans the track to be scanned by the A head 26, not the track to be scanned originally (the hatched track in the figure). And A head 26 are configured such that their azimuths are opposite to each other.
The track number data is not read from the track to be scanned by the head 26.

In the other off-track state, as shown in FIG.
As can be seen from FIG. 7, the B head 27 does not scan the recording track accurately. Then, as can be seen from the scanning trajectory OFF6 of the B head 27, the B head 27 scans a small area of the entire area of the track with the track number "2", and scans the entire area of the track with the track number "3". Most areas are scanned. Therefore, as shown in the figure, the relationship between the levels of the ATF signals f2 and f0 obtained from the track with the track number “1” and the track with the track number “3” adjacent to the track with the track number “2” is B As shown in the brackets attached to the scanning trajectory OFF6 of the head 27, the level of the ATF signal f2 <the ATF signal f
The level is 0.

The scanning locus of the B head 27 is turned off.
In the case of off-track as shown in FIG.
Scans the track to be scanned by the A head 26, not the track to be scanned primarily (the hatched track in the figure), but the azimuths of the B head 27 and the A head 26 are opposite to each other. It is configured as
The track number data is not read from the track to be scanned by the A head 26.

M. Description of operation when both A and B heads are used (see FIG. 11)

FIG. 11 is a flowchart for explaining the operation of the main part of the third embodiment of the CTL signal generation method and apparatus according to the present invention.

In step S10, it is determined whether or not the elapsed time from the A edge of the switching pulse SWp of the rotating drum 25 to the reading of the track number data is a reference time. If "YES", the flow shifts to step S11.
If “NO”, the process ends. That is, this step S1
0, the reference time comparison unit 1 shown in FIG.
0, the drum switching pulse SWp supplied via
When an A-edge is detected, an internal timer is started to start time measurement, and time is measured by a control signal supplied from the control unit 7 when the track number reading unit 2 reads track number data. finish. Then, the elapsed time data obtained by the measurement is compared with the reference time data read from the storage unit 8 to determine whether the elapsed time data matches the reference time data.

At step S11, track number data is read. Then, control goes to a step S12. That is, in this step S11, the track number reading unit 2
The track number data is read from the ID data of the reproduction data supplied via the input terminal 9, and the read track number data is supplied to the control unit 7. The control unit 7 supplies the track number data supplied from the track number reading unit 2 to the storage unit 8 and stores it.

In step S12, it is determined whether or not the channel is the A channel. If "YES", the process proceeds to step S13.
If “NO”, the process moves to the end step S14. That is, in this step S12, the drum switching pulse supplied via the input terminal 10 is detected, and it is determined whether or not the current period is the scanning period of the A head 26.

In step S13, ATF signals f3 and f1
Is determined to be a target value. If “YES”, the process shifts to the step S15; if “NO”, the process ends. That is,
In this step S13, first, the ATF detector 4 extracts the ATF signals f3 and f1 in the reproduction data supplied from the amplifier 23 shown in FIG. Next, the level detection unit 5 determines the levels of the ATF signals f3 and f1 extracted by the ATF detection unit 4,
It detects whether or not the levels indicated by the reference ATF level data read from the storage unit 8 are equal.

In step S14, ATF signals f2 and f0
Is determined to be a target value. If “YES”, the process shifts to the step S15; if “NO”, the process ends. That is,
In this step S14, first, the ATF detector 4 extracts the ATF signals f2 and f0 in the reproduction data supplied from the amplifier 23 shown in FIG. Then, next, the level detector 5 determines the levels of the ATF signals f2 and f0 extracted by the ATF detector 4,
It detects whether or not the levels indicated by the reference ATF level data read from the storage unit 8 are equal.

At step S15, it is determined whether or not the track number has been read. If "YES", the process shifts to step S16. If "NO", the process ends. That is, in step S15, the control unit 7 determines whether the track number reading unit 2 has read the track number data.

In step S16, the track number data is preset in the pseudo CTL generator 6. And it ends. That is, in step S16, the control unit 7 replaces the track number data stored in the storage unit 8 with the pseudo C
Preset in the TL generator 6. The pseudo CTL signal generation unit 6 generates one pulse when the number of pulses of the capstan motor frequency signal supplied via the input terminal 12 is counted to “32”, and furthermore, this pulse is generated by the preset track number data. Count from the indicated value. When the count value becomes "5", the pseudo CTL signal output from the output terminal 13 is changed from high level "1" to low level "0", and when the count value becomes "10", the pseudo-CTL signal is output. The pseudo CTL signal output from the terminal 13 is changed from low level "0" to high level "1".

As already described with reference to FIG. 2, in the present embodiment, the pseudo CTL generator 6 is
And a track counter 38. Therefore, in this case, the FG counter 37 counts the capstan motor frequency signal supplied from the FG generator 35 via the amplifier circuit 36, and when the count value becomes “32”, the FG counter 37 starts counting. The carry signal is output, and the track counter 38 counts the carry signal supplied from the FG counter 37 from the value indicated by the preset track number data, and when the count value becomes “5” as described above. The pseudo CTL signal output from the output terminal 13 is changed from high level "1" to low level "0".
When the count value becomes "10", the pseudo CTL signal output from the output terminal 13 is changed from low level "0" to high level "1".

As described above, in this example, the input terminal 1
0, the drum switching pulse SWp supplied via
The reference time comparison unit 1 stores the elapsed time from the detection of the A-edge to the detection of the track number data in the ID data of the reproduction data supplied via the input terminal 9 by the track number reading unit 2. 8, when the measured elapsed time and the reference time match, the track number reading unit 2 reads the track number data and detects the polarity of the drum switching pulse SWp. If the scanning period of the A head 26 or the scanning period of the B head 27 is detected, and if the scanning period of the A head 26 is detected, the level detection circuit 4
ATF signals f3 and f1 extracted by the ATF detection unit 4 from the reproduction data supplied through the input terminal 11
Is compared with the reference ATF level data read from the storage unit 8, and the level of the extracted ATF signal f3, A
When the level of the TF signal f1 and the reference ATF level data are all equal, it is detected whether or not the track number data has been read by the track number reading unit 2, and when it is detected that the scanning period of the B head 27 has been detected, The level detection circuit 4 compares the levels of the ATF signals f2 and f0 extracted by the ATF detection section 4 from the reproduction data supplied via the input terminal 11 with the reference ATF level data read from the storage section 8 and extracts the data. ATF signal f2
, The level of the ATF signal f0, and the reference ATF level data are all equal, it is detected whether or not the track number data has been read by the track number reading unit 2, and if the track number data has been read, The track number data is preset in the pseudo CTL generator 6, and the pseudo CTL generator 6 outputs the capstan motor frequency signal supplied via the input terminal 12 to "32".
Each time one track is counted, a track is counted from a preset value, and a CTL head records a pseudo CTL signal which becomes high level "1" or low level "0" every time "5" is counted. And output as a reproduced CTL signal.
Even when the VTR does not have an L head, the time code cannot be read during playback other than at 1x speed (for example, F
In WD 2 × speed reproduction, REV 2 × speed reproduction, etc.), various processes using the pseudo CTL signal, such as editing, can be performed, and use for the purpose of time code correction use, and output as an external signal as a CTL signal. This enables use with existing remote controllers, use of pseudo CTL signals in so-called AB roll editing, and use as control information when controlling a DT (dynamic tracking) head. it can.

Therefore, it is possible to cope with linear search and phase adjustment often performed at the time of editing, to prevent a free run state even during a speed change period, and to realize a VTR different from that at the time of recording.
Can be satisfactorily reproduced even with the use of, and furthermore, position information can be obtained more accurately, that is, a highly accurate pseudo CTL signal can be obtained.

Further, since the track number data is used in the process of generating the pseudo CTL signal, the accuracy of the pseudo CTL signal can be greatly improved. Further, in this example, one frame is composed of 10 tracks, and track number data is added to each track,
Since the pseudo CTL signal is generated using the added track number data, the accuracy of the pseudo CTL signal is improved by the division.

[Fifth Embodiment]

N. An example of the configuration of the main part when the A and B track pairs are counted as one and an explanation of the operation (see FIG. 12)

FIG. 12 is a configuration diagram showing an example of the configuration of a main part in the case where the A and B track pairs are counted as one. In the figure, parts corresponding to those in FIG.

[Connection and Configuration] In the figure, reference numeral 1 denotes a reference time comparison unit having a timer for comparing the time from when the edge of the drum switching pulse is detected to when the track number data is supplied with the reference time. Reference numeral 2 denotes a track number reading unit for reading a track number from the ID data of the reproduction data, 3 a polarity detection unit for detecting the polarity of the drum switching pulse, and 4 an ATF signal from the reproduction data supplied from the amplifier 3. AT to do
An F detector 5, a level detector 5 for detecting whether or not the levels of the ATF signals f1 and f2 are within a reference level range, a pseudo CTL generator 6 for generating a pseudo CTL, and a reference time 8 Reference time data used in the comparison unit 1;
A storage unit for storing the read track number data and the reference level data, 9 is an input terminal for inputting reproduction data, 10 is an input terminal for inputting a drum switching pulse, and 11 is an input terminal from the amplifier 23. An input terminal to which reproduction data is supplied, 12 is an input terminal to which a capstan motor frequency signal supplied from the FG generation circuit 35 shown in FIG. 2 via the amplification circuit 36 is supplied, and 13 is a pseudo CTL signal is output. Terminal 100 for converting the track number data into track pair number data as a group number.

Here, the group indicates all the tracks formed when the magnetic head mounted on one rotating drum scans the magnetic tape once each while the rotating drum makes one rotation. is there.

The reference numeral 7 writes the reference time data, the track number data and the reference level data into the storage section 8 and reads out these data written from the storage section 8, and the reference time comparison section 1 and the track number reading section. 2, polarity determining unit 3, ATF detecting unit 4, level detecting unit 5,
The control unit controls the pseudo CTL generation unit 6 and the pair number conversion unit 100.

Here, the reference time comparison unit 1, the polarity detection unit 3, the level detection unit 5, the control unit, the storage unit 8, and the pair number conversion unit 100 are the pseudo CTL microcomputer 31 shown in FIG. Corresponding to The track number reading section 2 is a track number detecting circuit 2 shown in FIG.
9, the ATF detecting section 4 corresponds to the ATF signal detecting circuit 30 shown in FIG. 2, and the pseudo CTL generating section 6 corresponds to the track counter 38 and the FG counter 37 shown in FIG.

[Operation] Playback data is supplied to the control unit 7 via the input terminal 9, and a drum switching pulse is supplied to the control unit 7 via the input terminal 10. When the drum switching pulse is supplied via the input terminal 10, the reference time comparison unit 1 starts counting the timer A from the time when the drum switching pulse detects the A edge at which the drum switching pulse changes from high level "1" to low level "0". Measurement of the elapsed time is started.

On the other hand, the track number reading section 2 detects the track number data in the ID data of the reproduction data supplied via the input terminal 9. Then, when the track number data is detected, data indicating that the track number data has been detected is supplied to the reference time comparison unit 1.
The reference time comparison unit 1 stops the timer that is measuring, compares the elapsed time data at that time with the reference time data read from the storage unit 8, and determines that the value indicated by the measured elapsed time data is It is determined whether or not the values indicating the reference time data match, and when they match, data indicating that fact is supplied to the control unit 7.

When the control unit 7 recognizes that the value indicated by the elapsed time data measured from the reference time comparison unit 1 matches the value indicating the reference time data, the track number reading unit 2 reads the track number data. Tell them to do it. Thus, the track number reading unit 2 reads the track number data in the ID data of the input reproduction data.

Next, the polarity detector 3 determines the polarity of the drum switching pulse supplied via the input terminal 9, that is, the polarity of the drum switching pulse.
Whether the drum switching pulse is high level “1” or low level “0” is detected, and when it is determined that the drum switching pulse is high level “1”, the drum switching pulse is high level “1”, that is, A head 2
Data indicating that the scanning period is 6 is supplied to the control unit 7. Further, the ATF detection unit 4 extracts an ATF signal in the reproduction data supplied via the input terminal 11 and supplies the extracted ATF signal to the level detection unit 4 via the control unit 7.

When the data supplied from the polarity detector 3 is data indicating that the drum switching pulse is at a high level "1", the controller 7 instructs the level detector 5 to perform level detection. I do. The level detection circuit 5 detects the level of the ATF signal supplied from the ATF detection circuit 4 and determines whether the level of the detected ATF signal is within the range of the ATF reference level read from the storage unit 8. When the level of the detected ATF signal is AT
If it is determined that it is within the range of the F reference level, data indicating that fact is supplied to the control unit 7.

On the other hand, when the track number data is supplied from the track number reading section 2, the control section 7 stores the track number data in the storage section 8 and stores the track number data in the pair number conversion section 100. To supply. The pair number conversion unit 100 obtains track pair number data from the track number data by several methods described later, and supplies the track pair number data to the control unit 7. The control unit 7 supplies the track pair number data from the pair number conversion unit 100 to the pseudo CTL generation unit 6 and presets the data.

The pseudo CTL generator 6 counts the capstan motor frequency signal supplied from the FG generator 35 shown in FIG. 2 via the input terminal 12 via the amplifier circuit 36, and the count value is "64". "" Is counted from the value indicated by the pair track number data preset by the control unit 7. When the count value becomes “2”, the pseudo CT
Change the L signal from high level “1” to low level “0”,
When the count value becomes "0", the pseudo CTL signal is changed from low level "0" to high level "1".

O. Description of a case where A and B track pairs are counted as one (see FIG. 13)

FIG. 13 is an explanatory diagram for explaining the tape format and timing when the A and B track pairs are counted as one. In this figure, the parts corresponding to those in FIG.

In the drawing, SWp is a switching pulse,
By1 is the scanning direction of the A and B heads 26 and 27;
2 is the running direction of the magnetic tape 28, Pctl is the pseudo CTL
The signal Cout is a carry signal output from the FG counter 37 and corresponds to two tracks. Also, f0, f1, and f2 shown above each recording track in the figure.
Indicates an ATF signal, a numeral shown below each recording track indicates a track number, A shown in each recording track indicates that scanning is performed by the A head 26, and is shown in each recording track. B indicates that scanning is performed on the B track 27.

The A head 26 is indicated by a thick solid line in track number 1. In the figure, the drum switching pulse SWp indicates a period during which the A head 26 scans a recording track. The direction of the drum switching pulse SWp shown in the drawing is from the bottom to the top in the drawing. Therefore, the A edge of the drum switching SWp is
This is the lower rising portion in the figure.

This example shows the case of the NTSC system.
The figure shows a case where one frame is composed of 10 tracks (in the PAL system, one frame is composed of 12 tracks). Tracking methods using ATF signals include A
With reference to the ATF signal f0 reproduced by the head 26, the magnitudes of the frequencies of the ATF signals f1 and f2 of the adjacent tracks are compared. That is, the level of the ATF signal f1, the level of the ATF signal f2, and the storage unit 8 shown in FIG.
It is determined whether or not the reference ATF levels stored in.

Here, it is assumed that the reference ATF level is just-tracked when, for example, f1 = f2 (| f1−f2 | ≦ α). The most appropriate value of α can be selected by measuring f1 and f2 when the track is just track.

Here, in order to explain the case where the A and B track pairs are counted as one, the hardware part (FG counter 37 and track counter 38) which operates differently from the first embodiment is shown in FIG. 1 and FIG.

[0230] The FG counter 37 counts the capstan motor frequency signal supplied from the FG generation circuit 35 via the amplification circuit 36, and the count value is, for example, "6".
At 4 ", a carry signal is generated, and the carry signal is supplied to the track counter 38. Here, F
The G generation circuit 35 generates two frequency signals whose phases are different from each other by 90 degrees by the rotation of the capstan motor 34. In addition, in the figure, it shows with the single line. FG
The counter 37 is supplied with a capstan motor frequency signal whose phase is advanced among the two capstan motor frequency signals having different phases.

[0231] The track counter 38 counts the carry signal supplied from the FG counter 37 from the value indicated by the track pair number data preset by the pseudo CTL microcomputer 31, and when the count value becomes "2". Is from high level “1” to low level “0”
When the count value becomes "0", a pulse which changes from low level "0" to high level "1" is output.

Here, the pair number conversion unit 1 shown in FIG.
As a conversion method at 00 (hereinafter referred to as a track pair number data obtaining method), four methods can be adopted as described below.

The first method of obtaining track pair number data is as follows. A table for converting track number data into track pair number data is provided in the pair number conversion unit 100 shown in FIG. 12 or the pseudo CTL microcomputer 31 shown in FIG. In this method, when track number data is supplied, track pair number data corresponding to the track number data is obtained by referring to a table. For example, 1 field is 1
When the track number data is composed of 0 tracks, if the value indicated by the track number data is “1” or “2”, the value of the track pair number data is “0”, and the value indicated by the track number data is “3”. Or, if “4”, the value of the track pair number data is “1”, and if the value indicated by the track number data is “5” or “6”, the value of the track pair number data is “2”, and the track number If the value indicated by the data is “7” or “8”, the value of the track pair number data is “3”, and if the value indicated by the track number data is “9” or “10”, the track pair number data indicates The value becomes "4".

The second track pair number data obtaining method is a division circuit that divides the value indicated by the track number data by “2” in the pair number conversion unit 100 shown in FIG. 12 or the pseudo CTL microcomputer 31 shown in FIG. When the value obtained as a result of this division is a positive integer, a subtraction circuit is provided which subtracts "1" from the value and uses the resulting value as track pair number data. In this method, division is performed each time the data is supplied, and only when the resulting value is a positive integer, "1" is subtracted from the value, and the resulting value is used as track pair number data. For example, when one field is composed of 10 tracks, the values indicated by the track number data are “2”, “4”, “6”,
If "8" or "10", an integer is obtained as a result of the division. Only in this case, track pair number data "0", "1", "2", "3" and "4" are respectively obtained. Obtainable.

The third track pair number data acquiring method determines whether the track number data input to the pair number conversion unit 100 shown in FIG. 12 or the pseudo CTL microcomputer 31 shown in FIG. 2 is an even number or an odd number. When the judgment circuit and the judgment circuit determine that the number is even,
In this method, the track number data is obtained by the first or second track pair number data obtaining method.

The fourth track pair number data acquisition method is the same as the third track pair number data acquisition method, except that the information indicating the polarity from the polarity detection unit 3 shown in FIG. 12 or the pseudo CTL shown in FIG. This is a method of obtaining information indicating the polarity detected by the microcomputer 31 and performing conversion using this information.

As another method of obtaining the first to fourth track pair number data, the FG counter 38
In this case, the condition for outputting the carry signal is set to "32", and every time the track counter 37 counts two carry signals, a method of incrementing the count by a higher-order counter can be adopted. In this case, the first embodiment F used in the example
It is not necessary to change the G counter 37.

The pseudo CTL signal obtained by the processing described above is supplied to the editing device 50. Here, the editing machine 50 is shown in the figure as an example for explaining a method of using the pseudo CTL signal, and the editing machine 50 transmits a time signal from the reproduction system signal processing circuit 43 in a phase adjustment operation at the time of editing. If the code cannot be obtained, the pseudo CTL signal from the track counter 38 is used.

That is, in this example, the track counter 3
When the value indicated by the track pair number data preset to 8 is "0" to "1", the pseudo CTL signal output from the track counter 38 becomes high level "1" and the count value counted by the track counter 38 Becomes "2", the pseudo CTL signal changes from high level "1" to low level "0".

On the other hand, when the value indicated by the track pair number data preset in the track counter 38 is "2" to "4", the pseudo CTL signal output from the track counter 38 becomes low level "0", When the count value counted by the counter 38 becomes “0”, the pseudo CTL signal changes from low level “0” to high level “1”.

The FG counter 37 counts the capstan motor frequency signal supplied from the FG generation circuit 35 via the amplification circuit 36, and the count value is, for example, “6”.
At 4 ", a carry signal is generated, and the carry signal is supplied to the track counter 38. Here, F
The G generation circuit 35 generates two frequency signals whose phases are different from each other by 90 degrees by the rotation of the capstan motor 34. In addition, in the figure, it shows with the single line. FG
The counter 37 is supplied with a capstan motor frequency signal whose phase is advanced among the two capstan motor frequency signals having different phases.

On the other hand, the two capstan motor frequency signals are supplied to the speed detection circuit 39 and the phase detection circuit 40, respectively. The speed detection circuit 39 detects the rotation speed of the capstan motor 34 using the capstan frequency signals having phases different from each other by 90 degrees and supplied from the FG generation circuit 35. Further, the phase detection circuit 40 includes an FG generation circuit 35.
The phase of the two capstan frequency signals supplied from is detected.

O. Description of the operation when the A and B track pairs are counted as one (see FIG. 14)

FIG. 14 is a flowchart for explaining the operation when the A and B track pairs are counted as one. In the figure, parts corresponding to those in FIG. 6 are denoted by the same reference numerals.

In step S1, it is determined whether the elapsed time from the A edge of the switching pulse SWp of the rotating drum 25 to the reading of the track number data is a reference time, and if "YES", the flow shifts to step S2. "N
If "O", the process ends. That is, in this step S1, the reference time comparison unit 1 shown in FIG.
Start the internal timer when the edge is detected,
The time measurement is started, and the time measurement is terminated by the control signal supplied from the control unit 7 when the track number reading unit 2 reads the track number data. And
The elapsed time data obtained by the measurement is compared with the reference time data read from the storage unit 8, and the elapsed time data is compared with the reference time data.
It is determined whether or not the reference time data matches.

In step S2, track number data is read. Then, control goes to a step S3. This step S
In 2, the track number reading unit 2 reads the track number data from the ID data of the reproduction data supplied via the input terminal 9 and supplies the read track number data to the control unit 7. The control unit 7 supplies the track number data supplied from the track number reading unit 2 to the storage unit 8 and stores it.

In step S3, it is determined whether or not the channel is the A channel. If "YES", the flow shifts to step S4 to select "N".
If "O", the process ends. In step S3, a drum switching pulse supplied via the input terminal 10 is detected, and it is determined whether or not the current period is the scanning period of the A head 26.

In the step S4, it is determined whether or not the ATF signals f2 and f1 are the target values.
Then, if "NO", the process ends. In this step S4, first, the ATF detector 4 extracts the ATF signals f2 and f1 in the reproduction data supplied from the amplifier 23 shown in FIG. And then
The level detector 5 detects whether or not the levels of the ATF signals f2 and f1 extracted by the ATF detector 4 are equal to the level indicated by the reference ATF level data read from the storage unit 8.

In step S5, it is determined whether or not the track number has been read. If "YES", the flow shifts to step S6. If "NO", the process ends. In step S5, the control unit 7 determines whether the track number reading unit 2 has read the track number data.

In step S6, the track pair number data is preset in the pseudo CTL generator 6. And it ends. In step S6, the pair number conversion unit 100 shown in FIG. 12 obtains track pair number data from the track number data stored in the storage unit 8 by the various methods described above, and converts the track pair number data into the pseudo CTL.
Preset in the generating unit 6.

The pseudo CTL signal generation section 6 has an input terminal 12
When the number of pulses of the capstan motor frequency signal supplied via the CPU is "64", one pulse is generated, and this pulse is counted from the value indicated by the preset track pair number data. When the count value becomes "2", the pseudo CTL signal output from the output terminal 13 is changed from high level "1" to low level "0". When the count value becomes "0", the pseudo-CTL signal is output. The pseudo CTL signal output from the terminal 13 is changed from low level "0" to high level "1".

As described above with reference to FIG. 12, in the present embodiment, the pseudo CTL generator 6 is constituted by the FG counter 37 and the track counter 38. Therefore, in this case, the capstan motor frequency signal supplied from the FG generator 35 via the amplifier circuit 36 is converted to the FG signal.
The counter 37 counts and the count value is “64”
, The FG counter 37 outputs a carry signal, and the track counter 38 counts the carry signal supplied from the FG counter 37 from the value indicated by the preset track pair number data. When the count value becomes “2”, the pseudo CTL signal output from the output terminal 13 is changed from high level “1” to low level “0”. When the count value becomes “0”, the output terminal 13 From the low level "0" to the high level "1".

As described above, in this example,
Since the track number data is counted for the A and B pairs, in addition to the effects of the first embodiment, the track processing can be performed using the A and B track pairs as one unit.

[Sixth Embodiment] Explanation when there are three magnetic heads

In the fifth embodiment, the case where "1" is counted in the A and B track pairs has been described. For example, when there are three or more heads, "1" is counted in a group. . In this case, the carry signal may be output when the value obtained by counting the rotation frequency signal of the capstan motor is, for example, “96” or more.

[Seventh Embodiment] Description when recording track pair number data on a magnetic tape in advance and using this track pair number data

In the fifth embodiment, the case where "1" is counted in the A and B track pairs has been described. However, the number data of the A and B track pairs is stored in a predetermined area (for example, ID) on the magnetic tape in advance. Area Sector I
Alternatively, the information may be recorded in a track number data recording area in the D area) and read.

In this case, since the track pair number data is recorded on the magnetic tape in advance, the pair number conversion unit 100 shown in FIG. 12 of the fifth embodiment is not required. Also,
If the track number data is not used, the track number detector 29 shown in FIG. 1 replaces the pair number data detector, and the track number reader 2 shown in FIG. 12 replaces the pair number reader. Step S2 in the flowchart shown in FIG. 14 is replaced with “read pair number”, and step S5 is replaced with “whether pair number was read?”. Therefore, when the pair number data is recorded on the magnetic tape in advance, in the first to sixth embodiments,
"Track number data" is "Track pair number data"
Replaces

When the track pair number data is recorded on a magnetic tape in advance, for example, the digital data (sync block) includes a sync area, an ID area,
In the case where the magnetic head has two channels, the track pair number data is stored in the video ID area of each of the A and B tracks, as described above. Recording may be performed, but track number data is recorded in each video ID area of the A and B tracks, and track pair number data is recorded in each audio ID area of the A and B tracks. You may do it. Further, the number of bytes in the ID area is increased, and both the track number data and the track pair number data are recorded in the video ID area. The track pair number data may be recorded in the ID area.

[Eighth Embodiment] Description when recording track number data and track pair number data on a magnetic tape in advance and using both track number data and track pair number data

In the seventh embodiment, the description has been given of the case where the track pair number data is recorded at a predetermined position on the magnetic tape in advance and is used. Track pair number data may be recorded in the ID area of the track, and time measurement may be performed using the track number data, and other processing may be performed using the track pair number data.

In this case, since the track number data and the track pair number data are recorded on the magnetic tape in advance, the pair number conversion unit 100 of FIG. 12 of the fifth embodiment is not required. Also, the track number detecting section 29 shown in FIG. 1 replaces the track number data and track pair number data detecting section, and the track number reading section 2 shown in FIG. 12 replaces the track number and pair number reading section. Step S5 in the flowchart shown in FIG. 14 is replaced with “Is the pair number readable?”. Therefore, when the pair number data is recorded on the magnetic tape in advance, in the first to seventh embodiments, in the description regarding the time measurement, the “track number data” is replaced with the “track pair number data”. Take over.

When the track number data and the track pair number data are recorded on a magnetic tape in advance, for example, the digital data (sync block) includes the sync area, the ID area, the data area, the inner check area, the data area, and the inner area. When the magnetic head has two channels, track number data is recorded in the video ID area of track A and track pair number data is recorded in the ID area of track B, as described above. Alternatively, the track number data may be recorded in the video ID areas of tracks A and B, respectively, and the track pair number data may be recorded in the audio ID areas of tracks A and B, respectively. . Further, the number of bytes in the ID area may be increased, and both the track number data and the track pair number data may be recorded in the video ID area.

[Ninth Embodiment] Description when N magnetic heads are used

In the first embodiment, the case where two magnetic heads are used has been described, but the number of magnetic heads is not limited. When N magnetic heads are mounted, the group is also “1” for tracks of N magnetic heads.

[0266]

According to the first aspect of the present invention, the time from when the edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is compared with the reference time. Then, when the measurement time and the reference time match, a comparison is made to determine whether or not the level of the tracking signal recorded together with the recording signal is within the allowable level range. When it is detected that the value is within the level range, the value indicated by the track number data extracted from the recording signal indicates
The recording tracks are counted, and each time the count value reaches a predetermined value, a CTL signal that changes from a high level to a low level or from a low level to a high level is generated. If the time until the track number data is detected coincides with the reference time and the level of the tracking signal is within the range of the allowable level, the accuracy obtained by counting from the value indicated by the track number data is obtained. If the time from when the edge of the drum switching pulse is detected until the track number data is detected is not the reference time, or when the level of the tracking signal is not within the allowable level, To output a CTL signal obtained by performing counting without presetting track number data By doing so, it is possible to cope with linear search and phase adjustment that are often performed during editing, to prevent a free-run state even during a speed change period, and to be able to reproduce well even when using a VTR different from that at the time of recording. Since position information can be obtained accurately, that is, a high-precision pseudo CTL signal can be obtained, in a VTR without a CTL head, the time code cannot be read at the time of reproduction other than 1x speed running (for example, FWD
2x speed playback, REV 2x speed playback, etc.)
Various processes using signals, such as editing, can be performed, and use for the purpose of time code correction,
Use as an CTL signal as an external signal for use with existing remote controllers, use of pseudo CTL signals in so-called AB roll editing, etc., as control information when controlling a DT (dynamic tracking) head There is an effect that it is possible to enable the use.

According to the second aspect described above, the time from the detection of one edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is compared with the reference time. Then, it is detected whether or not the polarity of the drum switching pulse is a polarity indicating that the scanning period is performed by a predetermined head among the plurality of heads. The level of a tracking signal extracted from a track adjacent to a recording track to be scanned by a predetermined head being recorded is compared with an allowable level, and the level of the tracking signal is set to an allowable level. When detecting that it is within the range, the recording track is counted from the value indicated by the track number data extracted from the recording signal, Each time the count value reaches a predetermined value, a CTL signal that changes from a high level to a low level or from a low level to a high level is generated. Therefore, the track number data is detected after the edge of the drum switching pulse is detected. Time to the reference time,
If the level of a tracking signal obtained from a track adjacent to a predetermined head is within an allowable level, an accurate CTL signal obtained by counting from the value indicated by the track number data is output. If the time from the detection of the edge of the drum switching pulse to the detection of the track number data is not the reference time, or if the level of the tracking signal is not within the allowable level, preset the track number data. A CTL signal obtained by performing counting without performing it can be output, thereby supporting linear search and phase adjustment often performed at the time of editing, and preventing a free-run state even during a speed change period. It is possible to reproduce well even if a VTR different from that at the time of recording is used, and to obtain more accurate positional information. That is, since it is possible to obtain a highly accurate pseudo CTL signal, VTR having no CTL head
In the case of playback other than 1x speed running (for example, FWD 2x speed playback, REV2
In the case of double-speed playback, etc., various processes using the CTL signal, for example, editing, etc., can be performed. Also, use for the purpose of time code correction, and output of an external signal as a CTL signal to an existing signal can be performed. Use with remote controller, so-called pseudo C for AB roll editing
Use of TL signal, DT (dynamic tracking)
This has the effect that it can be used as control information when controlling the head.

According to the third aspect described above, the time from the detection of one edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is compared with the reference time. Then, the polarity of the drum switching pulse is detected to indicate which of the plurality of heads is the scanning period, and the polarity of the drum switching pulse is determined by comparison when the measurement time and the reference time match. The recording is performed together with the recording signal by the predetermined head detected based on the data, and the level of the tracking signal extracted from the track adjacent to the recording track to be scanned by the predetermined head is compared with the allowable level. When it is detected that the level of the tracking signal is within the range of the allowable level, From the value indicated by the click number data,
The recording tracks are counted, and each time the count value reaches a predetermined value, a CTL signal that changes from a high level to a low level or from a low level to a high level is generated. If the time until the track number data is detected matches the reference time and the level of the tracking signal obtained from the adjacent track of the head being scanned is within the allowable level, the track number data is An accurate CTL signal obtained by counting from the indicated value is output, and the time from the detection of the edge of the drum switching pulse to the detection of the track number data is not the reference time, or the level of the signal for tracking. If is not within the range of the allowable level, counting is performed without presetting the track number data. A CTL signal obtained by performing the above operation can be output. This makes it possible to cope with a linear search and a phase adjustment that are frequently performed at the time of editing. Even if a VTR is used, good reproduction can be performed, and more accurate position information can be obtained. In other words, a high-precision pseudo CTL signal can be obtained. Therefore, in a VTR without a CTL head, the time code can be read. At the time of reproduction other than 1 × speed running (for example, FWD 2 × speed reproduction, REV 2 × speed reproduction, etc.), various processes using the CTL signal, such as editing, can be performed, and the purpose is to correct time code. Use in existing remote controllers, which is possible by outputting CTL signals to external signals The use of pseudo CTL signal in the B roll editing, etc., there is an effect that it is possible to allow for use as information for control in controlling the DT (dynamic tracking) head.

According to the fourth aspect described above, the time from when the edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured by the reference time comparing means, and the measured time is measured. The measured time is compared with the reference time, and by this comparison, the level comparing means compares whether or not the level of the tracking signal recorded together with the recording signal when the reference time matches is within an allowable level range. When detecting that the level of the tracking signal is within the range of the allowable level, the CTL signal generation means counts the recording track from the value indicated by the track number data extracted from the recording signal, and CTL signal which changes from high level to low level or from low level to high level every time becomes a predetermined value When the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the level of the tracking signal is within the allowable level, the track number data If the time from when the edge of the drum switching pulse is detected to when the track number data is detected is not the reference time, or when the tracking signal is If the level is not within the range of the allowable level, the CTL signal obtained by counting without performing the presetting of the track number data can be output, whereby the linear search and the phase adjustment often performed at the time of editing can be performed. , And can be prevented from being in the free-run state even during the speed change period. Even if R is used, good reproduction can be performed, and more accurate position information can be obtained. In other words, a high-precision pseudo CTL signal can be obtained. Therefore, in a VTR without a CTL head, the time code can be read. At the time of reproduction other than the 1 × speed running (for example, FWD 2 × speed reproduction, REV 2 × speed reproduction, etc.), various processes using the CTL signal, such as editing, can be performed, and the purpose is to correct time code. For use in existing remote controllers that can be output by outputting it as a CTL signal to an external signal, use of a pseudo CTL signal in so-called AB roll editing, etc., and control for controlling a DT (dynamic tracking) head There is an effect that it can be used as information.

According to the fifth aspect of the present invention, the reference time comparing means measures the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal, and determines the measured time. By comparing with the reference time, the measurement time is compared with the level comparison means to determine whether or not the level of the tracking signal recorded together with the recording signal when the reference time matches is within an allowable level, The capstan frequency signal corresponding to the rotation of the capstan motor from the capstan frequency signal generation means is counted by the track detection means, and a track detection signal corresponding to the recording track is output. Based on the track detection signal, a CTL signal is generated. Generated by the CTL signal generation means,
When it is detected that the level of the tracking signal is within the range of the allowable level, the control unit presets the track number data extracted from the recording signal to the CTL signal generation unit. When the time from the detection of the edge to the detection of the track number data matches the reference time, and the level of the tracking signal is within the allowable level, the track detection is performed from the value indicated by the track number data. If the time from when the edge of the drum switching pulse is detected to when the track number data is detected is not the reference time, or when the level of the tracking signal is If it is not within the allowable level, the track number data is not preset and the A CTL signal obtained by counting the clock detection signal can be output, thereby supporting a linear search and phase adjustment often performed at the time of editing, and preventing a free-run state even during a speed change period. , And it is possible to satisfactorily reproduce even if a VTR different from that used at the time of recording is used, and to obtain more accurate position information. That is, it is possible to obtain a highly accurate pseudo CTL signal. In
At the time of playback other than 1x speed running where time code cannot be read (for example, 2x FWD playback, 2x REV playback, etc.)
In addition, various processes using the CTL signal, such as editing, can be performed, and can be used for the purpose of time code correction, and can be output to an external signal as a CTL signal by an existing remote controller. Use, that is, the use of a pseudo CTL signal in so-called AB roll editing and the like, and the use as control information when controlling a DT (dynamic tracking) head can be enabled.

According to the sixth aspect of the present invention, the time from the detection of one edge of the drum switching pulse to the detection of the track number data in the recording signal is measured by the reference time comparison means. When the time is compared with the reference time, the polarity detection unit detects whether the polarity of the drum switching pulse is a polarity indicating a scanning period by a predetermined head among the plurality of heads, and compares the polarity with the polarity detection unit. When the measurement time and the reference time match, the level of the tracking signal extracted by the extraction means from the adjacent track of the recording track to be scanned by the predetermined head, which is recorded together with the recording signal by the level comparison means, Is within the range of the allowable level, and the track detection means The capstan frequency signal corresponding to the rotation of the capstan motor is counted, a track detection signal corresponding to the recording track is output, and a CTL signal is generated by the CTL signal generation means based on the track detection signal. When it is detected that the level of the tracking signal is within the range of the allowable level, the track number data extracted from the recording signal is converted to the CT number.
Since the L signal generating means is preset by the control means, the time from the detection of the edge of the drum switching pulse to the detection of the track number data coincides with the reference time, and is obtained by a predetermined head. If the level of the tracking signal is within the allowable level, an accurate CTL signal obtained by counting the track detection signal from the value indicated by the track number data is output, and the edge of the drum switching pulse is detected. If the time from when the track number data is detected is not the reference time, or when the level of the tracking signal is not within the allowable level, the track detection signal is counted without presetting the track number data. Is performed, and the CTL signal obtained by performing the Linear search and phase adjustment can be supported, free-run state can be prevented even during a speed change period, good reproduction can be performed using a VTR different from the recording time, and more accurate positional information can be obtained. That is, since a highly accurate pseudo CTL signal can be obtained, in a VTR without a CTL head, during reproduction other than 1 × speed running (for example, FWD 2 × speed reproduction, REV 2 × speed reproduction, etc.) where time code cannot be read. Can also perform various processes using the CTL signal, for example, editing, etc., can be used for time code correction purposes, and can be used with an existing remote controller that can be output as a CTL signal to an external signal. Use of pseudo CTL signal in so-called AB roll editing, D
There is an effect that it can be used as control information when controlling a T (dynamic tracking) head.

According to the seventh aspect of the present invention, the time from the detection of one edge of the drum switching pulse to the detection of the track number data in the recording signal is measured by the reference time comparison means. The time is compared with the reference time, and whether the polarity of the drum switching pulse is a polarity indicating that it is a scanning period by a predetermined head among the plurality of heads is detected by the polarity detecting means, and the polarity is detected by the polarity detecting means. When the measurement time and the reference time coincide, the predetermined head detected based on the polarity of the drum switching pulse is recorded together with the recording signal, and is extracted from the adjacent track of the recording track to be scanned by the predetermined head by the extracting means. The level comparing means compares whether or not the level of the extracted tracking signal is within the range of an allowable level. The capstan frequency signal corresponding to the rotation of the capstan motor from the rotation number signal generation means is counted, and a track detection signal corresponding to the recording track is output by the track detection means. Based on the track detection signal, a CTL signal is generated. Is generated by the CTL signal generation means, and when the level comparison means detects that the level of the tracking signal is within the allowable level, the track number data extracted from the recording signal is controlled by the CTL signal generation means. Means, the time from the detection of the edge of the drum switching pulse to the detection of the track number data coincides with the reference time, and the tracking signal obtained by the scanning head is not used. If the level is within the allowable level, track detection is performed from the value indicated by the track number data. Outputs exact CTL signal counts obtained by performing signal, or if the time from the detection of the edge of the drum switching pulse to the detection of the track number data is not the reference time,
If the level of the tracking signal is not within the range of the allowable level, the track detection signal is obtained by counting the track detection signal without presetting the track number data.
A TL signal can be output, which can cope with linear search and phase adjustment often performed at the time of editing, can prevent a free-run state even during a speed change period, and can use a VTR different from that at the time of recording. Can play well,
Moreover, it is possible to obtain more accurate position information, that is,
Since a highly accurate pseudo CTL signal can be obtained, C
In a VTR without a TL head, even during playback other than 1x speed running (for example, FWD 2x speed playback, REV 2x speed playback, etc.), time code cannot be read.
Various processes using the CTL signal, such as editing, can be performed, used for the purpose of time code correction, and used in an existing remote controller that can be output as a CTL signal to an external signal. A
There is an effect that the use of the pseudo CTL signal in B-roll editing or the like and the use as control information when controlling a DT (dynamic tracking) head can be enabled.

According to the eighth aspect, the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is compared with the reference time. The comparison compares whether the level of the tracking signal recorded together with the recording signal is within the range of the allowable level when the measurement time and the reference time match, and determines that the level of the tracking signal is within the allowable level. When detecting that the data is within the range, based on the track number data extracted from the recording signal, a plurality of new tracks indicating a group of all tracks formed when each of the magnetic heads scans the magnetic tape once each time. Group number data, and from the value indicated by the group number data,
A group is counted, and every time the count value reaches a predetermined value, a CTL signal that changes from a high level to a low level or from a low level to a high level is generated. If the time until the number data is detected coincides with the reference time and the level of the tracking signal is within the range of the allowable level, an accurate value obtained by counting from the value indicated by the group number data is obtained. If the time from outputting the CTL signal and detecting the edge of the drum switching pulse to detecting the track number data is not the reference time, or if the level of the tracking signal is not within the allowable level, the group It is possible to output the CTL signal obtained by performing counting without presetting the number data. This makes it possible to cope with linear searches and phase adjustments that are frequently performed during editing, to prevent a free-run state even during a speed change period, to be able to reproduce well even when using a VTR different from that at the time of recording, and to improve the position. Since information can be obtained accurately, that is, a high-precision pseudo CTL signal can be obtained, in a VTR without a CTL head, the time code cannot be read at the time of reproduction other than 1x speed running (for example, FWD).
2x speed playback, REV 2x speed playback, etc.)
Various processes using signals, such as editing, can be performed, and use for the purpose of time code correction,
Use as an CTL signal as an external signal for use with existing remote controllers, use of pseudo CTL signals in so-called AB roll editing, etc., as control information when controlling a DT (dynamic tracking) head There is an effect that it is possible to enable the use.

According to the ninth aspect, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is compared with the reference time. Then, it is detected whether or not the polarity of the drum switching pulse is a polarity indicating that the scanning period is performed by a predetermined head among the plurality of heads. The level of a tracking signal extracted from a track adjacent to a recording track to be scanned by a predetermined head being recorded is compared with an allowable level, and the level of the tracking signal is set to an allowable level. When it is detected that the data is within the range, a plurality of magnetic heads are operated once each based on the track number data extracted from the recording signal. New group number data indicating the group of all the tracks formed when the tape is scanned, the group is counted from the value indicated by the group number data, and every time the count value reaches a predetermined value, the count value changes from a high level. Since the CTL signal that changes from the low level or the low level to the high level is generated, the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and If the level of the tracking signal obtained from the adjacent track of the head is within the allowable level, an accurate CTL signal obtained by counting from the value indicated by the group number data is output, and drum switching is performed. When the time from detecting the pulse edge to detecting the track number data is not the reference time If the level of the tracking signal is not within the allowable range, the CTL signal obtained by counting without presetting the group number data can be output. It is possible to cope with the linear search and the phase adjustment that is performed, to prevent the free-run state even during the speed change period, to be able to reproduce well even when using a VTR different from the recording time, and to obtain more accurate positional information. That is, since a highly accurate pseudo CTL signal can be obtained, a VTR without a CTL head can be obtained.
In the case of playback other than 1x speed running (for example, FWD 2x speed playback, REV2
In the case of double-speed playback, etc., various processes using the CTL signal, for example, editing, etc., can be performed. Also, use for the purpose of time code correction, and output of an external signal as a CTL signal to an existing signal can be performed. Use with remote controller, so-called pseudo C for AB roll editing
Use of TL signal, DT (dynamic tracking)
This has the effect that it can be used as control information when controlling the head.

According to the tenth aspect, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is compared with the reference time. Then, the polarity of the drum switching pulse is detected to determine which of the plurality of heads is the scanning period, and a comparison is made. The recording is performed together with the recording signal by the predetermined head detected based on the data, and the level of the tracking signal extracted from the track adjacent to the recording track to be scanned by the predetermined head is compared with the allowable level. Then, when it was detected that the level of the tracking signal was within the range of the allowable level, it was extracted from the recording signal. Based on the rack number data, from all the tracks to obtain a new group number data indicating the group of the value indicated by the group number data formed when a plurality of magnetic head scans the magnetic tape by each one,
A group is counted, and a CTL signal that changes from a high level to a low level or from a low level to a high level is generated each time the count value reaches a predetermined value. If the time until the number data is detected matches the reference time and the level of the tracking signal obtained from the adjacent track of the head being scanned is within the allowable level, the group number data indicates If the time from when the edge of the drum switching pulse is detected to when the track number data is detected is not the reference time, or when the level of the tracking signal is If it is not within the allowable level, the counting is performed without presetting the group number data. A CTL signal obtained by the above operation can be output, whereby it is possible to cope with linear search and phase adjustment often performed at the time of editing, to prevent a free-run state even during a speed change period, and to realize a VTR different from that at the time of recording. , It is possible to satisfactorily reproduce the information and obtain more accurate position information. That is, it is possible to obtain a highly accurate pseudo CTL signal, so that a time code cannot be read in a VTR without a CTL head. At the time of reproduction other than the 1 × speed running (for example, FWD 2 × speed reproduction, REV 2 × speed reproduction, etc.), various processes using the CTL signal, such as editing, can be performed, and the purpose is to correct the time code. Use in existing remote controllers, which is possible by outputting a CTL signal to an external signal, so-called AB The use of pseudo CTL signal in Lumpur editing, etc., there is an effect that it is possible to allow for use as information for control in controlling the DT (dynamic tracking) head.

According to the eleventh aspect of the present invention, the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal is measured by the reference time comparison means, and the measured time is measured. When the measured time matches the reference time, the level comparing means compares the level of the tracking signal recorded together with the recording signal to determine whether or not the level is within an allowable level. When a plurality of magnetic heads scan the magnetic tape once each based on track number data extracted from the recording signal when detecting that the level of the tracking signal is within the allowable level range. New group number data indicating the group of all the tracks formed in The CTL signal which changes from high level to low level or from low level to high level is generated by the CTL signal generation means every time the event value reaches a predetermined value. When the time until the detection of the number data coincides with the reference time, and the level of the tracking signal is within the range of the allowable level, it is obtained by counting the group from the value indicated by the group number data. If the time from outputting the accurate CTL signal and detecting the edge of the drum switching pulse to detecting the track number data is not the reference time, or if the level of the tracking signal is not within the allowable level, And the CTL signal obtained by counting the group without presetting the group number data This makes it possible to cope with linear searches and phase adjustments that are frequently performed during editing, to prevent free-running even during periods of speed changes, and to reproduce well even when using a VTR different from that used during recording. VTR that does not have a CTL head because it is possible to obtain position information more accurately, that is, to obtain a highly accurate pseudo CTL signal.
In the case of playback other than 1x speed running (for example, FWD 2x speed playback, REV2
In the case of double-speed playback, etc., various processes using the CTL signal, for example, editing, etc., can be performed. Also, use for the purpose of time code correction, and output of an external signal as a CTL signal to an existing signal can be performed. Use with remote controller, so-called pseudo C for AB roll editing
Use of TL signal, DT (dynamic tracking)
This has the effect that it can be used as control information when controlling the head.

According to the twelfth aspect, the time from when the edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is used as the reference time. Compare by comparison means,
When the measurement time and the reference time match, the level comparison unit compares whether the level of the tracking signal recorded together with the recording signal is within an allowable level, and compares the measured time with the rotation of the capstan motor. A corresponding capstan frequency signal is generated by a capstan frequency signal generating means, and the capstan frequency signal from the capstan frequency signal generating means is counted by a group detecting means, and a plurality of magnetic heads are respectively operated once by a magnetic tape. A group detection signal corresponding to a group of all tracks formed when scanning is output, the group detection signal from the group detection unit is counted by the counting unit, and based on the track number data extracted from the recording signal, All tracks formed when a plurality of magnetic heads scan the magnetic tape once each time. New group number data indicating the group of the group is obtained by the group number obtaining means, the CTL signal is generated by the CTL signal generation means based on the count value output from the counting means, and the level of the tracking signal is within the allowable level. Is detected, the control unit presets the group number data from the group number acquisition unit to the CTL signal generation unit, so that the track number data is detected after the edge of the drum switching pulse is detected. If the time up to the reference time coincides with the reference time and the level of the tracking signal is within the range of the allowable level, an accurate CTL obtained by counting the group detection signal from the value indicated by the group number data Output a signal to detect the edge of the drum switching pulse and then record the track number data. If the time until the detection is not the reference time, or if the level of the tracking signal is not within the range of the allowable level, it is obtained by counting the group detection signal without presetting the group number data. It is possible to output a CTL signal, thereby coping with linear search and phase adjustment often performed at the time of editing, preventing a free-run state even during a speed change period, and setting a V different from that at the time of recording.
Even if the TR is used, good reproduction can be performed, and more accurate position information can be obtained.
Since a signal can be obtained, in a VTR without a CTL head, during playback other than 1x speed running (for example, FWD 2x speed playback, R
EV double-speed playback, etc.), various processes using the CTL signal, such as editing, can be performed.
Use with an existing remote controller that can be performed by outputting as an L signal, use of a pseudo CTL signal in so-called AB roll editing, etc., use as control information when controlling a DT (dynamic tracking) head The effect is that it can be made possible.

According to the thirteenth aspect, the time from the detection of one edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is defined as the reference time. The reference time comparison means compares the polarity of the drum switching pulse with a polarity detection means to detect whether the polarity is a scanning period by a predetermined head among a plurality of heads, and extracts a tracking signal. And by comparison with the polarity detection means,
When the measured time and the reference time match, the level comparing means extracts the level of the tracking signal extracted by the extracting means from the adjacent track of the recording track to be scanned by the predetermined head recorded with the recording signal. The capstan frequency signal corresponding to the rotation of the capstan motor is generated by the capstan frequency signal generation means, and the capstan frequency signal generation means generates the capstan frequency signal corresponding to the rotation of the capstan motor. The capstan frequency signal is counted, and a plurality of magnetic heads output a group detection signal corresponding to a group of all tracks formed when the magnetic head scans the magnetic tape once each, and the group detection signal from the group detection means is output. The track number data extracted from the recording signal is counted by the counting means. Based on the above, new group number data indicating a group of all tracks formed when a plurality of magnetic heads scan the magnetic tape one by one each time is obtained by the group number obtaining means, and the count value output from the counting means is obtained. A CTL signal is generated by the CTL signal generation means based on the control signal, and when it is detected that the level of the tracking signal is within the allowable level, the group number data from the group number acquisition means is controlled by the CTL signal generation means. Means, the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and
When the level of the tracking signal obtained by the predetermined head is within the range of the allowable level, an accurate CTL signal obtained by counting the group detection signal from the value indicated by the group number data is output, If the time from when the edge of the drum switching pulse is detected to when the track number data is detected is not the reference time, or when the level of the tracking signal is not within the allowable level, the group number data is preset. The CTL signal obtained by counting the group detection signal can be output without the need, so that it is possible to cope with the linear search and the phase adjustment that are frequently performed at the time of editing, and the free run state does not occur even during the speed change period. Can be reproduced well using a VTR different from the one used for recording, and more accurate positional information can be obtained. In other words, since a highly accurate pseudo CTL signal can be obtained, in a VTR without a CTL head, during playback other than 1x speed running (for example, FWD 2x playback, REV 2x speed), the time code cannot be read. Playback, etc.), it is possible to perform various processes using the CTL signal, for example, editing, etc., to use it for the purpose of time code correction, and to output it to an external signal as a CTL signal. Use in controller, use of pseudo CTL signal in so-called AB roll editing, DT (dynamic
(Tracking) There is an effect that it can be used as control information when controlling the head.

[0279] According to the fourteenth aspect, the time from when one edge of the drum switching pulse is detected to when track number data in the recording signal is detected is measured, and the measured time is defined as the reference time. The reference time comparison means compares the polarity of the drum switching pulse with a polarity detection means to detect whether the polarity is a scanning period by a predetermined head among a plurality of heads, and extracts a tracking signal. And by comparison with the polarity detection means,
When the measurement time and the reference time match, the level comparison means records the signal together with the recording signal by a predetermined head detected based on the polarity of the drum switching pulse,
The capstan frequency corresponding to the rotation of the capstan motor is compared by comparing whether the level of the tracking signal extracted by the extracting means from the track adjacent to the recording track to be scanned by the predetermined head is within an allowable level. A signal is generated by a capstan frequency signal generating means, and the group detecting means counts the capstan frequency signal from the capstan frequency signal generating means, and when a plurality of magnetic heads scan the magnetic tape once each, A group detection signal corresponding to the group of all tracks to be formed is output, the group detection signal from the group detection means is counted by the counting means, and a plurality of magnetic heads are provided based on the track number data extracted from the recording signal. All tracks formed by scanning the magnetic tape once each time New group number data indicating the group is obtained by the group number obtaining means, a CTL signal is generated by the CTL signal generation means based on the count value output from the counting means, and the level of the tracking signal is allowed by the level comparison means. Is detected within the range, the track number data extracted from the recording signal is preset in the CTL signal generating means by the control means. If the time until the detection of the signal coincides with the reference time and the level of the tracking signal obtained by the scanning head is within the allowable level, the group detection signal is obtained from the value indicated by the group number data. And outputs an accurate CTL signal obtained by counting If the time from when the edge of the track is detected until the track number data is detected is not the reference time, or when the level of the tracking signal is not within the allowable level, the group number data is not preset and the group A CTL signal obtained by counting the detection signal can be output,
This makes it possible to cope with linear searches and phase adjustments that are often performed during editing, to prevent a free-run state even during a speed change period, to be able to reproduce well even when using a VTR different from that used during recording, and to obtain more positional information. , Ie, a highly accurate pseudo CTL signal can be obtained. Therefore, in a VTR without a CTL head, reproduction (for example, FWD 2 × speed) other than 1 × speed running in which the time code cannot be read is performed. Playback, REV double speed playback, etc.), it is possible to perform various processes using the CTL signal, such as editing, etc., use it for the purpose of time code correction, and output it as a CTL signal to an external signal. Use of the existing remote controller, use of the pseudo CTL signal in so-called AB roll editing, DT ( There is an effect that it is possible to allow for use as information for control in controlling the Inamikku tracking) head.

According to the fifteenth aspect described above, the recording indicates the group of all tracks formed when the plurality of magnetic heads scan the magnetic tape once each after detecting the edge of the drum switching pulse. Measure the time until the group number data in the signal is detected, compare the measured time with the reference time, and compare the measured time and the tracking time recorded with the recording signal when the reference time matches. Compare whether the signal level is within the allowable level range, and when detecting that the level of the tracking signal is within the allowable level range, count the group from the value indicated by the group number data, Each time the count value reaches a predetermined value, it changes from high level to low level,
Alternatively, since a CTL signal that changes from a low level to a high level is generated, the time from the detection of the edge of the drum switching pulse to the detection of the group number data matches the reference time, and the tracking signal If the level is within the allowable level range, an accurate CTL signal obtained by counting from the value indicated by the group number data is output, and the edge of the drum switching pulse is detected, and then the group number data is detected. If the time until the time is not the reference time, or if the level of the tracking signal is not within the range of the allowable level, the CTL signal obtained by counting without presetting the group number data is output. This allows for a simpler configuration and linear editing that is often performed during editing. It is possible to cope with a phase change, to prevent a free-run state even during a speed change period, to be able to reproduce well even when using a VTR different from that at the time of recording, and to obtain more accurate positional information. Since a pseudo CTL signal with high accuracy can be obtained, in a VTR without a CTL head, during reproduction other than 1 × speed running (for example, FWD2
In the case of double-speed playback and REV double-speed playback, various processes using the CTL signal, such as editing, can be performed. In addition, it can be used for time code correction purposes, and can be output as an external signal as a CTL signal. It can be used in existing remote controllers that can be used, that is, the use of pseudo CTL signals in so-called AB roll editing and the like, and the use as control information when controlling a DT (dynamic tracking) head. effective.

According to the sixteenth aspect described above, a group of all tracks formed when a plurality of magnetic heads scan the magnetic tape once each after detecting one edge of the drum switching pulse is shown. Measuring the time until the group number data in the recording signal is detected, comparing the measured time with the reference time, and confirming that the polarity of the drum switching pulse is the scanning period of the predetermined head among the plurality of heads. The measured time and the reference time are detected, and when the measured time coincides with the reference time, a tracking head extracted from a track adjacent to a recording track to be scanned by a predetermined head that is recorded together with a recording signal is detected. Compare whether the signal level is within the allowable level or not, and confirm that the tracking signal level is within the allowable level. When issued, the group is counted from the value indicated by the group number data, and each time the count value reaches a predetermined value, a CTL signal that changes from a high level to a low level or from a low level to a high level is generated. Therefore, the time from the detection of the edge of the drum switching pulse to the detection of the group number data coincides with the reference time, and the level of the tracking signal obtained from the adjacent track of the predetermined head is at the allowable level. If it is within the range, an accurate CTL signal obtained by counting from the value indicated by the group number data is output, and the time from when the edge of the drum switching pulse is detected to when the group number data is detected is set as a reference. If it is not time, or if the level of the tracking signal is not within the acceptable level, Can output a CTL signal obtained by counting without performing presetting of the signal data, thereby simplifying the configuration and supporting linear search and phase adjustment often performed during editing. Can be prevented from being in the free-run state even during the change period, and it is possible to reproduce well even if a VTR different from that used at the time of recording is used, and to obtain more accurate position information. That is, to obtain a pseudo CTL signal with high accuracy VTR without CTL head
In the case of playback other than 1x speed running (for example, FWD 2x speed playback, REV2
In the case of double-speed playback, etc., various processes using the CTL signal, for example, editing, etc., can be performed. Also, use for the purpose of time code correction, and output of an external signal as a CTL signal to an existing signal can be performed. Use with remote controller, so-called pseudo C for AB roll editing
Use of TL signal, DT (dynamic tracking)
This has the effect that it can be used as control information when controlling the head.

According to the seventeenth aspect described above, a group of all tracks formed when a plurality of magnetic heads scan the magnetic tape once each after detecting one edge of the drum switching pulse is shown. Measure the time until the group number data in the recording signal is detected, compare the measured time with the reference time, and indicate which of the plurality of heads the drum switching pulse is in the scanning period by the head. By detecting the polarity, the predetermined time detected based on the polarity of the drum switching pulse when the measurement time matches the reference time by comparison,
The level of the tracking signal, which is recorded together with the recording signal and extracted from a track adjacent to the recording track to be scanned by the predetermined head, is within an allowable level. When it is detected that the number is within the level range, the group is counted from the value indicated by the group number data, and every time the count value reaches a predetermined value, the level changes from high level to low level or from low level to high level. Since the CTL signal is generated, the time from the detection of the edge of the drum switching pulse to the detection of the group number data matches the reference time, and the tracking obtained from the adjacent track of the head being scanned. If the level of the signal for use is within the range of the allowable level, Is performed, the time from when the edge of the drum switching pulse is detected to when the group number data is detected is not the reference time, or when the level of the tracking signal is an allowable level. If it is not within the range, the C obtained by counting without presetting the group number data is obtained.
A TL signal can be output, whereby the configuration can be simplified, linear search and phase adjustment often performed at the time of editing can be supported, and a free-run state can be prevented even during a speed change period. V different from time
Even if the TR is used, good reproduction can be performed, and more accurate position information can be obtained.
Since a signal can be obtained, in a VTR without a CTL head, during playback other than 1x speed running (for example, FWD 2x speed playback, R
EV double-speed playback, etc.), various processes using the CTL signal, such as editing, can be performed.
Use with an existing remote controller that can be performed by outputting as an L signal, use of a pseudo CTL signal in so-called AB roll editing, etc., use as control information when controlling a DT (dynamic tracking) head The effect is that it can be made possible.

According to the eighteenth aspect, all tracks formed when the plurality of magnetic heads scan the magnetic tape once each after the edge of the drum switching pulse is detected by the reference time comparing means. Measure the time until the group number data in the recording signal is detected, and compare the measured time with the reference time.If the measured time and the reference time match, The level comparing means compares whether or not the level of the recorded tracking signal is within the allowable level. When it is detected that the level of the tracking signal is within the allowable level, the group number is determined. The group is counted from the value indicated by the data, and each time the count value reaches a predetermined value, the level is changed from high level to low level or from low level to high level. Since the CTL signal to be a bell is generated by the CTL signal generation means, the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the tracking signal Is within the range of the allowable level, an accurate CTL signal obtained by counting the group from the value indicated by the group number data is output, and the edge of the drum switching pulse is detected before the group number data If the time until the detection is not the reference time, or if the level of the tracking signal is not within the range of the allowable level, the CTL obtained by counting the groups without presetting the group number data is used.
A signal can be output, which simplifies the configuration, supports linear search and phase adjustment often performed at the time of editing, prevents free-running even during periods of speed change, and saves time during recording. Even if a different VTR is used, good reproduction can be performed, and more accurate position information can be obtained. That is, a high-precision pseudo CTL signal can be obtained. Even during playback other than 1x speed running (for example, FWD 2x playback, REV 2x playback, etc.) that makes reading unreadable, various processes using the CTL signal, such as editing, can be performed, and time code correction is used. Use with existing remote controllers, which is possible by outputting CTL signals to external signals, so-called The use of pseudo CTL signal in the B roll editing, etc., there is an effect that it is possible to allow for use as information for control in controlling the DT (dynamic tracking) head.

[0284] According to the nineteenth aspect described above, recording indicates a group of all tracks formed when a plurality of magnetic heads scan the magnetic tape once each after detecting the edge of the drum switching pulse. The time until the group number data in the signal is detected is measured, and the measured time is compared with the reference time by the reference time comparing means. By comparison, the measured time is recorded together with the recording signal when the measured time matches the reference time. The level comparing means compares whether the level of the tracking signal is within the range of the allowable level,
The capstan frequency signal corresponding to the rotation of the capstan motor is generated by the capstan frequency signal generating means, and the capstan frequency signal from the capstan frequency signal generating means is counted by the group detecting means, and a plurality of magnetic heads are generated. A group detection signal corresponding to a group of all tracks formed when the magnetic tape is scanned once each is output, a group detection signal from the group detection unit is counted by the counting unit, and a count value output from the counting unit is output. The CTL signal is generated by the CTL signal generating means based on the above, and when it is detected that the level of the tracking signal is within the range of the allowable level, the group number data is preset to the CTL signal generating means by the control means. To detect the edge of the drum switching pulse. If the time from when the group number data is detected matches the reference time and the level of the tracking signal is within the allowable level, the group detection signal is counted from the value indicated by the group number data. If the time from when the edge of the drum switching pulse is detected to when the group number data is detected is not the reference time, or when the level of the tracking signal is within the allowable level, If not, it is possible to output the CTL signal obtained by counting the group detection signal without presetting the group number data, thereby simplifying the configuration and frequently performing editing. It can support linear search and phase adjustment, so that it does not enter a free-run state even during speed changes. , Be used during recording is different VTR satisfactorily be reproduced, moreover it is possible to accurately obtain more position information, i.e., accurate pseudo C
Since a TL signal can be obtained, a VTR without a CTL head uses the CTL signal even during playback other than 1x speed running (for example, 2x FWD playback, 2x REV playback, etc.) where time code cannot be read. In addition to being able to perform various types of processing, such as editing, use for the purpose of time code correction, use with existing remote controllers that can be performed by outputting an external signal as a CTL signal, so-called AB roll editing, etc. This makes it possible to use the pseudo CTL signal and to use it as control information when controlling a DT (dynamic tracking) head.

According to the above twentieth aspect, a group of all tracks formed when a plurality of magnetic heads scan the magnetic tape once each after detecting one edge of the drum switching pulse is shown. Measuring the time until the group number data in the recording signal is detected, comparing the measured time with a reference time by reference time comparing means,
The polarity detecting means detects whether or not the polarity of the drum switching pulse is a polarity indicating a scanning period by a predetermined head among the plurality of heads, extracts a tracking signal by the extracting means, and detects the tracking signal by the polarity detecting means. When the measured time and the reference time coincide with each other, the level comparing means extracts the tracking track extracted by the extracting means from the adjacent track of the recording track to be scanned by the predetermined head recorded with the recording signal. The capstan frequency signal corresponding to the rotation of the capstan motor is generated by the capstan frequency signal generating means, and the capstan frequency signal is generated by the group detecting means. The capstan frequency signal from the generating means is counted, and a plurality of magnetic heads are operated once each time. A group detection signal corresponding to a group of all tracks formed when the tape is scanned is output, the group detection signal from the group detection means is counted by the counting means, and a CTL signal is output based on the count value output from the counting means. Is generated by the CTL signal generating means, and when it is detected that the level of the tracking signal is within the range of the allowable level, the group number data is preset in the CTL signal generating means by the control means. When the time from the detection of the edge of the switching pulse to the detection of the group number data coincides with the reference time, and the level of the tracking signal obtained by the predetermined head is within the allowable level. , The accurate value obtained by counting the group detection signal from the value indicated by the group number data If the time from outputting the TL signal and detecting the edge of the drum switching pulse to detecting the group number data is not the reference time, or if the level of the tracking signal is not within the allowable level, the group It is possible to output the CTL signal obtained by counting the group detection signal without presetting the number data, thereby making it possible to simplify the configuration and to perform linear search or editing which is frequently performed during editing. It can cope with phasing, prevent a free-run state even during a speed change period, and can reproduce well using a VTR different from that used during recording, and can obtain more accurate position information. , A pseudo-CTL signal having a high TTL signal can be obtained. During playback other than 1x speed running (for example, FWD 2x speed playback, REV 2x speed playback, etc.) that makes reading unreadable, various processes using the CTL signal, such as editing, can be performed, and time code correction can be performed. Intended use, use with existing remote controllers enabled by outputting CTL signals to external signals, use of pseudo CTL signals in so-called AB roll editing, etc.
There is an effect that it can be used as control information when controlling a T (dynamic tracking) head.

According to the twenty-first aspect described above, a group of all tracks formed when a plurality of magnetic heads scan the magnetic tape once each after detecting one edge of the drum switching pulse is shown. Measuring the time until the group number data in the recording signal is detected, comparing the measured time with a reference time by reference time comparing means,
The polarity detecting means detects whether or not the polarity of the drum switching pulse is a polarity indicating a scanning period by a predetermined head among the plurality of heads, extracts a tracking signal by the extracting means, and detects the tracking signal by the polarity detecting means. When the measured time and the reference time coincide with each other, the level comparison means records the signal together with the recording signal by the predetermined head detected based on the polarity of the drum switching pulse, and should be scanned by the predetermined head. The capstan frequency signal corresponding to the rotation of the capstan motor is compared with whether or not the level of the tracking signal extracted by the extracting means from the adjacent track to the recording track is within an allowable level. Generated by the capstan frequency signal generating means by the group detecting means. And outputs a group detection signal corresponding to a group of all tracks formed when a plurality of magnetic heads scan the magnetic tape once each, and counts the group detection signal from the group detection means. The CTL signal is generated by the CTL signal generating means based on the count value output from the counting means, and the level comparing means detects that the level of the tracking signal is within the allowable level. Since the group number data extracted from the recording signal is preset in the CTL signal generating means by the control means, the time from the detection of the edge of the drum switching pulse to the detection of the group number data is equal to the reference time. And the level of the tracking signal obtained by the scanning head is If it is within the range of the tolerance level, an accurate CTL signal obtained by counting the group detection signal from the value indicated by the group number data is output, and after detecting the edge of the drum switching pulse, the group number data is output. If the time until the detection is not the reference time, or if the level of the tracking signal is not within the range of the allowable level, the CTL obtained by counting the group detection signal without presetting the group number data. A signal can be output, which can make the configuration simpler, and can cope with linear search and phase adjustment that are often performed during editing, and can prevent a free-run state even during a speed change period. It is possible to reproduce well even if a VTR different from that at the time of recording is used, and to obtain more accurate positional information. That is, since a highly accurate pseudo CTL signal can be obtained, in a VTR without a CTL head, at the time of reproduction other than 1 × speed running such that time code cannot be read (for example, FWD 2 × speed reproduction, REV 2 × speed reproduction, etc.) In addition, various processes using the CTL signal, such as editing, can be performed, and can be used for the purpose of time code correction, and can be output to an external signal as a CTL signal by an existing remote controller. use,
Use of pseudo CTL signal in so-called AB roll editing, etc.
This has the effect that it can be used as control information when controlling a DT (dynamic tracking) head.

According to the twenty-second aspect described above, the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is compared with the reference time. The comparison compares whether the level of the tracking signal recorded together with the recording signal when the measurement time and the reference time match is within the range of the allowable level, and determines that the level of the tracking signal is within the allowable level. When it is detected that the number is within the range, the plurality of magnetic heads scan the magnetic tape once each, and count the groups from the value indicated by the group number data indicating the group of all the tracks formed. Each time the value becomes a predetermined value, a CTL signal that changes from a high level to a low level or from a low level to a high level is generated. If the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the level of the tracking signal is within the allowable level, the group number data is An accurate CTL signal obtained by counting from the indicated value is output, and the time from the detection of the edge of the drum switching pulse to the detection of the track number data is not the reference time, or the level of the signal for tracking. Is not within the range of the allowable level, the CTL signal obtained by performing the counting without performing the presetting of the group number data can be output, thereby simplifying the configuration and increasing the number of times when editing. Compatible with linear search and phase adjustment to be performed, and does not enter a free-run state even during periods of speed change It is possible to reproduce well even if a VTR different from that used for recording is used, and to obtain more accurate position information. That is, it is possible to obtain a pseudo CTL signal with high accuracy. In, even during playback other than 1x speed running such that the time code becomes unreadable (for example, FWD 2x playback, REV 2x playback, etc.), various processes using the CTL signal, such as editing, can be performed. Use for code correction purposes, use with existing remote controllers enabled by outputting as external signal as CTL signal, use of pseudo CTL signal in so-called AB roll editing, etc., DT (dynamic
(Tracking) There is an effect that it can be used as control information when controlling the head.

According to the twenty-third aspect, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is compared with the reference time. Then, it is detected whether or not the polarity of the drum switching pulse is a polarity indicating that the scanning period is performed by a predetermined head among the plurality of heads. The level of the tracking signal extracted from the track adjacent to the recording track to be scanned by the predetermined head is compared with the level of the allowable level, and the level of the tracking signal is set to the allowable level. When it is detected that the data is within the range, the plurality of magnetic heads scan the magnetic tape once each, and all the tracks formed when the magnetic head scans the magnetic tape once. The group is counted from the value indicated by the group number data indicating the loop, and each time the count value reaches a predetermined value, a CTL signal that changes from a high level to a low level or from a low level to a high level is generated. The time from the detection of the edge of the drum switching pulse to the detection of the track number data coincides with the reference time, and the level of the tracking signal obtained from the adjacent track of the predetermined head is within the allowable level. In the case of, an accurate CTL signal obtained by counting from the value indicated by the group number data is output,
If the time from when the edge of the drum switching pulse is detected to when the track number data is detected is not the reference time, or when the level of the tracking signal is not within the allowable range, the group number data is preset. The CTL signal obtained by performing the counting can be output without any need, so that the configuration can be simplified, the linear search and the phase adjustment that are frequently performed at the time of editing can be supported, and even during the speed change period, it is free. A run state can be prevented, good reproduction can be performed even when a VTR different from that used during recording is used, and more accurate position information can be obtained. That is, a pseudo CTL signal with high accuracy can be obtained. In VTRs without heads, when playing back at times other than 1x speed running where time code cannot be read (eg (For example, FWD 2 × speed reproduction, REV 2 × speed reproduction, etc.), various processes using the CTL signal, such as editing, can be performed, and use for the purpose of time code correction use, and output as an external signal as a CTL signal. This enables use with existing remote controllers, use of pseudo-CTL signals in so-called AB roll editing, and use as control information when controlling a DT (dynamic tracking) head. There is an effect that can be.

According to the twenty-fourth aspect, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is compared with the reference time. Then, the polarity of the drum switching pulse is detected to indicate which of the plurality of heads is the scanning period, and the polarity of the drum switching pulse is determined by comparison when the measurement time and the reference time match. Is compared with a recording signal, which is recorded together with a recording signal by a predetermined head detected based on the tracking signal extracted from a track adjacent to a recording track to be scanned by the predetermined head. When it is detected that the level of the tracking signal is within the range of the allowable level, each of the plurality of magnetic heads The number of groups is counted from the value indicated by the group number data indicating the group of all tracks formed when the magnetic tape is scanned each time, and each time the count value reaches a predetermined value, the level is changed from high level to low level or low level , A CTL signal which becomes a high level is generated, so that the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and the adjacent track of the head being scanned. If the level of the tracking signal obtained from is within the range of the allowable level, an accurate CTL signal obtained by counting from the value indicated by the group number data is output, and the edge of the drum switching pulse is detected. If the time from when the track number data is detected until the C-level issue of when not within the tolerance level, obtained by performing counting without performing preset group number data
A TL signal can be output, whereby the configuration can be simplified, linear search and phase adjustment often performed at the time of editing can be supported, and a free-run state can be prevented even during a speed change period. V different from time
Even if the TR is used, good reproduction can be performed, and more accurate position information can be obtained.
Since a signal can be obtained, in a VTR without a CTL head, during playback other than 1x speed running (for example, FWD 2x speed playback, R
EV double-speed playback, etc.), various processes using the CTL signal, such as editing, can be performed.
Use with an existing remote controller that can be performed by outputting as an L signal, use of a pseudo CTL signal in so-called AB roll editing, etc., use as control information when controlling a DT (dynamic tracking) head The effect is that it can be made possible.

According to the twenty-fifth aspect, the reference time comparing means measures the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal. When the measured time and the reference time match, the level comparing means compares the level of the tracking signal recorded together with the recording signal to determine whether or not the level is within an allowable level. Group number data indicating a group of all tracks formed when a plurality of magnetic heads scan the magnetic tape once each time when it is detected that the level of a tracking signal is within an allowable level range. The group is counted from the value indicated by, and each time the count value reaches a predetermined value, the level is changed from high level to low level or from low level to high level. Since the CTL signal generating unit generates the CTL signal, the time from when the edge of the drum switching pulse is detected to when the track number data is detected matches the reference time, and the tracking signal is used. If the level is within the allowable level range, an accurate CTL signal obtained by counting the group from the value indicated by the group number data is output, and the edge of the drum switching pulse is detected before the track number data is detected. If the time until the detection is not the reference time, or if the level of the tracking signal is not within the range of the allowable level, the CTL obtained by counting the groups without presetting the group number data is used.
A signal can be output, which simplifies the configuration, supports linear search and phase adjustment often performed at the time of editing, prevents free-running even during periods of speed change, and saves time during recording. Even if a different VTR is used, good reproduction can be performed, and more accurate position information can be obtained. That is, a high-precision pseudo CTL signal can be obtained. Even during playback other than 1x speed running (for example, FWD 2x playback, REV 2x playback, etc.) that makes reading unreadable, various processes using the CTL signal, such as editing, can be performed, and time code correction is used. Use with existing remote controllers, which is possible by outputting CTL signals to external signals, so-called The use of pseudo CTL signal in the B roll editing, etc., there is an effect that it is possible to allow for use as information for control in controlling the DT (dynamic tracking) head.

According to the twenty-sixth aspect, the time from the detection of the edge of the drum switching pulse to the detection of the track number data in the recording signal is measured, and the measured time is used as the reference time. Compare by comparison means,
When the measurement time and the reference time match, the level comparison unit compares whether the level of the tracking signal recorded together with the recording signal is within an allowable level, and compares the measured time with the rotation of the capstan motor. A corresponding capstan frequency signal is generated by a capstan frequency signal generating means, and the capstan frequency signal from the capstan frequency signal generating means is counted by a group detecting means, and a plurality of magnetic heads are respectively operated once by a magnetic tape. And outputs a group detection signal corresponding to the group of all tracks formed when scanning is performed, counts the group detection signal from the group detection means by the counting means, and outputs the CTL signal based on the count value output from the counting means. CTL
When a plurality of magnetic heads scan the magnetic tape once each by a plurality of magnetic heads when detecting that the level of the tracking signal generated by the signal generating means is within an allowable level range, Since the group number data indicating the group is preset in the CTL signal generating means by the control means, the time from the detection of the edge of the drum switching pulse to the detection of the track number data matches the reference time, and If the level of the tracking signal is within the allowable range, an accurate CTL signal obtained by counting the group detection signal from the value indicated by the group number data is output, and the edge of the drum switching pulse is detected. If the time from when the track number data is detected is not the reference time,
If the level of the tracking signal is not within the range of the allowable level, C is obtained by counting the group detection signal without presetting the group number data.
A TL signal can be output, whereby the configuration can be simplified, linear search and phase adjustment often performed at the time of editing can be supported, and a free-run state can be prevented even during a speed change period. V different from time
Even if the TR is used, good reproduction can be performed, and more accurate position information can be obtained.
Since a signal can be obtained, in a VTR without a CTL head, during playback other than 1x speed running (for example, FWD 2x speed playback, R
EV double-speed playback, etc.), various processes using the CTL signal, such as editing, can be performed.
Use with an existing remote controller that can be performed by outputting as an L signal, use of a pseudo CTL signal in so-called AB roll editing, etc., use as control information when controlling a DT (dynamic tracking) head The effect is that it can be made possible.

According to the twenty-seventh aspect, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is defined as the reference time. The reference time comparison means compares the polarity of the drum switching pulse with a polarity detection means to detect whether the polarity is a scanning period by a predetermined head among a plurality of heads, and extracts a tracking signal. And by comparison with the polarity detection means,
When the measured time and the reference time match, the level comparing means extracts the level of the tracking signal extracted by the extracting means from the adjacent track of the recording track to be scanned by the predetermined head recorded with the recording signal. The capstan frequency signal corresponding to the rotation of the capstan motor is generated by the capstan frequency signal generation means, and the capstan frequency signal generation means generates the capstan frequency signal corresponding to the rotation of the capstan motor. The capstan frequency signal is counted, and a plurality of magnetic heads output a group detection signal corresponding to a group of all tracks formed when the magnetic head scans the magnetic tape once each, and the group detection signal from the group detection means is output. Counting by the counting means, based on the count value output from the counting means The CTL signal is generated by the CTL signal generation means, and is formed when the plurality of magnetic heads scan the magnetic tape once each time when detecting that the level of the tracking signal is within the allowable level. Group number data indicating the group of all tracks
Since the L signal generation means is preset by the control means, the time from the detection of the edge of the drum switching pulse to the detection of the track number data coincides with the reference time, and is obtained by a predetermined head. If the level of the tracking signal is within the allowable range, an accurate CTL signal obtained by counting the group detection signal from the value indicated by the group number data is output, and the edge of the drum switching pulse is detected. If the time from when the track number data is detected until the detection of the track number data is not the reference time, or when the level of the tracking signal is not within the allowable range, the group detection signal is counted without presetting the group number data. Can be output as a CTL signal obtained by performing In addition to being able to cope with linear searches and phase adjustments often performed during editing, it is possible to prevent a free-run state even during periods of speed changes, and to be able to reproduce well even when using a VTR different from that used during recording. More accurate position information can be obtained, that is, a highly accurate pseudo CTL signal can be obtained. Therefore, in a VTR without a CTL head, the time code cannot be read at the time of reproduction other than 1x speed running ( For example, in FWD 2 × speed reproduction, REV 2 × speed reproduction, etc.), various processes using the CTL signal, such as editing, can be performed, and use for the purpose of time code correction use, or output as an external signal as a CTL signal. It is possible to use the pseudo CTL signal in the existing remote controller, so-called AB roll editing, etc. Use, D
There is an effect that it can be used as control information when controlling a T (dynamic tracking) head.

According to the twenty-eighth aspect described above, the time from when one edge of the drum switching pulse is detected to when the track number data in the recording signal is detected is measured, and the measured time is defined as the reference time. The reference time comparison means compares the polarity of the drum switching pulse with a polarity detection means to detect whether the polarity is a scanning period by a predetermined head among a plurality of heads, and extracts a tracking signal. And by comparison with the polarity detection means,
When the measurement time and the reference time match, the level comparison means records the signal together with the recording signal by a predetermined head detected based on the polarity of the drum switching pulse,
The capstan frequency corresponding to the rotation of the capstan motor is compared by comparing whether the level of the tracking signal extracted by the extracting means from the track adjacent to the recording track to be scanned by the predetermined head is within an allowable level. A signal is generated by a capstan frequency signal generating means, and the group detecting means counts the capstan frequency signal from the capstan frequency signal generating means, and when a plurality of magnetic heads scan the magnetic tape once each, A group detection signal corresponding to the group of all tracks to be formed is output, the group detection signal from the group detection means is counted by the counting means, and the CTL signal is converted to the CTL signal based on the count value output from the counting means.
A plurality of magnetic heads are formed when each of the plurality of magnetic heads scans the magnetic tape once, when the level is detected by the signal generating means and the level of the tracking signal is within an allowable level by the level comparing means. The control means presets the group number data indicating the group of all the tracks to be recorded in the CTL signal generating means, so that the time from the detection of the edge of the drum switching pulse to the detection of the track number data is equal to the reference time. Thank you
If the level of the tracking signal obtained by the scanning head is within the allowable level, an accurate CTL signal obtained by counting the group detection signal from the value indicated by the group number data is obtained. If the time from when the edge of the drum switching pulse is detected until the track number data is detected is not the reference time, or when the level of the tracking signal is not within the allowable level, the group number data is output. CTL obtained by counting the group detection signal without performing preset
A signal can be output, which can make the configuration simpler, and can cope with linear search and phase adjustment that are often performed during editing, and can prevent a free-run state even during a speed change period. Therefore, even if a VTR different from the one used for recording is used, it is possible to satisfactorily reproduce and obtain more accurate position information. That is, it is possible to obtain a highly accurate pseudo CTL signal. Also, at the time of reproduction other than 1 × speed running such that the time code becomes unreadable (for example, FWD 2 × speed reproduction, REV 2 × speed reproduction, etc.), various processes using the CTL signal, such as editing, can be performed, and the time code Existing remote controller that can be used for correction purposes and output by outputting CTL signals to external signals The use of an effect that the so-called AB using pseudo CTL signal in the roll editing, etc., DT may enable use as information for control in controlling (dynamic tracking) head.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a main part of an embodiment (first embodiment) of a CTL signal generation method and apparatus according to the present invention.

FIG. 2 is a configuration diagram showing an example of a VTR to which the CTL signal generation method and device of the present invention are applied.

FIG. 3 is an explanatory diagram showing a frequency spectrum of an ATF signal used for describing an embodiment of the CTL signal generation method and apparatus of the present invention.

FIG. 4 is an explanatory diagram for explaining a tape format, a pseudo CTL signal, and an output of an FG counter for describing an embodiment of a CTL signal generation method and apparatus according to the present invention;

FIG. 5 is an explanatory diagram for explaining a tape running speed and a scanning pattern of a magnetic track by a magnetic head for explaining an embodiment of a CTL signal generating method and apparatus according to the present invention;

FIG. 6 is a flowchart for explaining an operation of generating a pseudo CTL signal for explaining one embodiment of the CTL signal generation method and apparatus of the present invention;

FIG. 7 is an explanatory diagram for explaining a reading state of track number data at the time of just tracking and at the time of off-tracking for describing an embodiment of the CTL signal generation method and apparatus of the present invention.

FIG. 8 is a diagram illustrating a method of generating a CTL signal according to the present invention and an apparatus for scanning the magnetic track using a pseudo CTL signal based on the start of scanning of a magnetic head at double speed of FWD, which is used for describing an embodiment of the apparatus. FIG. 3 is an explanatory diagram for explaining a pattern.

FIG. 9 illustrates a method of generating a CTL signal according to the present invention and an apparatus for scanning the magnetic track by a magnetic head using a pseudo CTL signal with reference to the end of scanning of a magnetic head at double speed of FWD for explaining one embodiment of the method. FIG. 3 is an explanatory diagram for explaining a pattern.

FIG. 10 is an explanatory diagram for explaining a read state of track number data at the time of just tracking and at the time of off-tracking for describing a third embodiment of the CTL signal generation method and apparatus according to the present invention.

FIG. 11 is a flowchart for explaining an operation of generating a pseudo CTL signal for describing a third embodiment of the CTL signal generation method and apparatus of the present invention.

FIG. 12 is a configuration diagram showing a configuration example of a main part when counting is performed by A and B track pairs for explanation of a fifth embodiment of the CTL signal generation method and apparatus according to the present invention;

FIG. 13 is an explanatory diagram for explaining a tape format and timing when counting is performed on A and B track pairs for explanation of a fifth embodiment of the CTL signal generation method and apparatus according to the present invention.

FIG. 14 is a flowchart for explaining an operation when counting is performed on A and B track pairs for explanation of a fifth embodiment of the CTL signal generation method and apparatus of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 reference time comparison section 2 track number reading section 3 polarity detection section 4 ATF detection section 5 level detection section 6 pseudo CTL generation section 7 control section 8 storage section 22 recording system signal processing circuit 23 amplifier 24 head switching circuit 25 rotating drum 26 A Head 27 B head 28 Magnetic tape 29 Track number detection circuit 30 ATF signal detection circuit 31 Pseudo CTL microcomputer 32, 35 FG generation circuit 33, 36, 42 Amplification circuit 34 Capstan motor 37 FG counter 38 Track counter 39 Speed detection circuit 40 Phase Detection circuit 41 Capstan control microcomputer 43 Reproduction system signal processing circuit 50 Editing machine 100 Pair number conversion unit

Claims (28)

(57) [Claims] 1. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generation method used in a reproducing apparatus configured to reproduce the recording signal, wherein a time from detection of an edge of the drum switching pulse to detection of track number data in the recording signal is determined. The measured time is compared with a reference time, and the level of the tracking signal recorded together with the recording signal when the measured time matches the reference time is within an allowable level. And whether or not the level of the signal for tracking is within the range of the allowable level. At this time, the recording tracks are counted from the value indicated by the track number data extracted from the recording signal, and each time the count value reaches a predetermined value, the recording track changes from a high level to a low level or from a low level to a high level. CT
A method for generating a CTL signal, wherein an L signal is generated. 2. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by switching drum switching pulses. And a CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, comprising: detecting one edge of the drum switching pulse until detecting track number data in the recording signal. Measuring the time, comparing the measured time with a reference time, detecting whether or not the polarity of the drum switching pulse is a polarity indicating a scanning period by a predetermined head among the plurality of heads; By the above, when the measurement time and the reference time coincide, the predetermined head recorded together with the recording signal Therefore, it is determined whether the level of the tracking signal extracted from the adjacent track of the recording track to be scanned is within the allowable level, and the level of the tracking signal is within the allowable level. Is detected, the recording track is counted from the value indicated by the track number data extracted from the recording signal. Each time the count value reaches a predetermined value, the recording track is counted from a high level to a low level or from a low level to a high level. Level CT
A method for generating a CTL signal, wherein an L signal is generated. 3. A recording signal on which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, comprising: detecting one edge of the drum switching pulse until detecting track number data in the recording signal. Measuring the time, comparing the measured time with a reference time, detecting whether the polarity of the drum switching pulse is a polarity indicating which of the plurality of heads is a scanning period, When the measurement time matches the reference time, a predetermined value detected based on the polarity of the drum switching pulse is used. The head compares the level of a tracking signal that is recorded together with the recording signal and extracted from a track adjacent to a recording track to be scanned by the predetermined head is within an allowable level. When detecting that the level of the signal is within the range of the allowable level, the recording track is counted from the value indicated by the track number data extracted from the recording signal, and the count value becomes a predetermined value. Each time the CT changes from the high level to the low level or from the low level to the high level
A method for generating a CTL signal, wherein an L signal is generated. 4. A recording signal on which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generation device used in a reproduction device configured to reproduce the recording signal, wherein a time from when an edge of the drum switching pulse is detected to when track number data in the recording signal is detected is determined. Reference time comparing means for measuring and measuring the measured time with a reference time; and a level of the tracking signal recorded together with the recording signal when the measured time and the reference time match by the comparison. Level comparing means for comparing whether or not is within an allowable level, and the level of the tracking signal is When it is detected that the value is within the range of the allowable level, the recording track is counted from the value indicated by the track number data extracted from the recording signal, and every time the count value reaches a predetermined value, the recording track is changed from the high level. CTL signal generation means for generating a CTL signal that changes from a low level or a low level to a high level. 5. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generation device used in a reproduction device configured to reproduce the recording signal, wherein a time from when an edge of the drum switching pulse is detected to when track number data in the recording signal is detected is determined. Reference time comparing means for measuring and measuring the measured time with a reference time; and a level of the tracking signal recorded together with the recording signal when the measured time and the reference time match by the comparison. Level comparing means for comparing whether the pressure is within an allowable level, and a cap corresponding to the rotation of the capstan motor. A capstan frequency signal generating means for generating a capstan frequency signal; a track detecting means for counting a capstan frequency signal from the capstan frequency signal generating means and outputting a track detection signal corresponding to the recording track; CTL signal generation means for generating a CTL signal based on a track detection signal from the detection means, wherein when the level of the tracking signal is detected to be within the allowable level, the recording signal is output. Control means for presetting track number data extracted from inside the CTL signal generation means. 6. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by switching drum switching pulses. And a CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, comprising: detecting one edge of the drum switching pulse until detecting track number data in the recording signal. Reference time comparison means for measuring time and comparing the measured time with a reference time; determining whether the polarity of the drum switching pulse is a polarity indicating a scanning period by a predetermined head of the plurality of heads. Polarity detecting means for detecting, extracting means for extracting the tracking signal, and comparison between the polarity detecting means When the measurement time and the reference time coincide, a tracking signal extracted by the extraction means from a track adjacent to a recording track to be scanned by the predetermined head and recorded together with the recording signal is extracted. Level comparing means for comparing whether or not the level is within an allowable level; capstan frequency signal generating means for generating a capstan frequency signal corresponding to rotation of the capstan motor; Track detection means for counting the capstan frequency signal and outputting a track detection signal corresponding to the recording track, and CTL signal generation means for generating a CTL signal based on the track detection signal from the track detection means In the level comparing means, the level of the tracking signal is Serial when it detects that it is within the allowable level, the CTL signal generating apparatus characterized by a control means for presetting the track number data extracted from within the recording signal to the CTL signal generating means. 7. Scanning a recording signal recorded with a tracking signal superimposed thereon so as to form an inclined track on a magnetic tape while switching a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, comprising: detecting one edge of the drum switching pulse until detecting track number data in the recording signal. Reference time comparison means for measuring time and comparing the measured time with a reference time; determining whether the polarity of the drum switching pulse is a polarity indicating a scanning period by a predetermined head of the plurality of heads. Polarity detection means for detecting, extraction means for extracting the tracking signal, and comparison between the polarity detection means That is, when the measurement time and the reference time coincide with each other, a predetermined head detected based on the polarity of the drum switching pulse is recorded together with the recording signal, and a recording track to be scanned by the predetermined head is recorded. Level comparing means for comparing whether or not the level of the tracking signal extracted from the adjacent track by the extracting means is within an allowable level; and a capstan for generating a capstan frequency signal corresponding to the rotation of the capstan motor. Frequency signal generating means, track detecting means for counting a capstan frequency signal from the capstan frequency signal generating means and outputting a track detection signal corresponding to the recording track, and a track detection signal from the track detecting means. CTL signal generation means for generating a CTL signal based on When the level comparing means detects that the level of the tracking signal is within the range of the allowable level, the track number data extracted from the recording signal is preset in the CTL signal generating means. A CTL signal generation device, comprising: a control unit. 8. A recording signal recorded with a tracking signal superimposed thereon so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generation method used in a reproducing apparatus configured to reproduce the recording signal, wherein a time from detection of an edge of the drum switching pulse to detection of track number data in the recording signal is determined. The measured time is compared with a reference time, and the level of the tracking signal recorded together with the recording signal when the measured time matches the reference time is within an allowable level. And whether or not the level of the tracking signal is within the range of the allowable level. At this time, based on the track number data extracted from the recording signal, new group number data indicating a group of all tracks formed when the plurality of magnetic heads scan the magnetic tape one by one each. The group is counted from the value indicated by the group number data. Each time the count value reaches a predetermined value, the CT changes from a high level to a low level or from a low level to a high level.
A method for generating a CTL signal, wherein an L signal is generated. 9. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by switching drum switching pulses. And a CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, comprising: detecting one edge of the drum switching pulse until detecting track number data in the recording signal. Measuring the time, comparing the measured time with a reference time, detecting whether or not the polarity of the drum switching pulse is a polarity indicating a scanning period by a predetermined head of the plurality of heads; Thus, when the measurement time and the reference time match, the predetermined head recorded with the recording signal Therefore, it is determined whether the level of the tracking signal extracted from the track adjacent to the recording track to be scanned is within the range of the allowable level, and the level of the tracking signal is within the range of the allowable level. Is detected, a new group indicating a group of all tracks formed when the plurality of magnetic heads scan the magnetic tape once each based on the track number data extracted from the recording signal. Number data is obtained. The group is counted from the value indicated by the group number data. Each time the count value reaches a predetermined value, the CT changes from a high level to a low level or from a low level to a high level.
A method for generating a CTL signal, wherein an L signal is generated. 10. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by switching drum switching pulses. And a CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, comprising: detecting one edge of the drum switching pulse until detecting track number data in the recording signal. Measuring the time, comparing the measured time with a reference time, detecting whether the polarity of the drum switching pulse is a polarity indicating which of the plurality of heads is a scanning period, When the measurement time matches the reference time, a predetermined value detected based on the polarity of the drum switching pulse is used. Comparing the level of a tracking signal recorded from a track adjacent to a recording track to be scanned by the predetermined head with the recording signal within a range of an allowable level; The plurality of magnetic heads scan the magnetic tape once each based on the track number data extracted from the recording signal when it is detected that the level of the read signal is within the range of the allowable level. New group number data indicating the group of all the tracks formed when the group number is counted, the group is counted from the value indicated by the group number data, and every time the count value reaches a predetermined value, the level is changed from high level to low level. CT that changes from level or low level to high level
A method for generating a CTL signal, wherein an L signal is generated. 11. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generation device used in a reproduction device configured to reproduce the recording signal, wherein a time from when an edge of the drum switching pulse is detected to when track number data in the recording signal is detected is determined. Reference time comparing means for measuring and measuring the measured time with a reference time; and a level of the tracking signal recorded together with the recording signal when the measured time and the reference time match by the comparison. Level comparing means for comparing whether or not the level is within an allowable level; When a plurality of magnetic heads scan the magnetic tape once each based on the track number data extracted from the recording signal when it is detected that the magnetic tape is within the allowable level range. New group number data indicating a group of all tracks is obtained, and the group is counted from the value indicated by the group number data. Each time the count value reaches a predetermined value, the level is changed from high level to low level or from low level to low level. CT for generating a CTL signal of high level
A CTL signal generation device comprising: an L signal generation unit. 12. A recording signal on which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generating device used in a reproducing device configured to reproduce the recording signal, wherein a time from when an edge of the drum switching pulse is detected to when track number data in the recording signal is detected is determined. A reference time comparing means for measuring and measuring the measured time with a reference time; and a level of the tracking signal recorded together with the recording signal when the measured time and the reference time match by the comparison. Level comparing means for comparing whether or not the pressure is within the range of an allowable level, and a key corresponding to the rotation of the capstan motor. A capstan frequency signal generating means for generating a capstan frequency signal; forming a capstan frequency signal from the capstan frequency signal generating means when the plurality of magnetic heads scan the magnetic tape once each time Group detection means for outputting a group detection signal corresponding to a group of all tracks to be processed, counting means for counting the group detection signal from the group detection means, and track number data extracted from the recording signal. Group number obtaining means for obtaining new group number data indicating a group of all tracks formed when each of the plurality of magnetic heads scans the magnetic tape once each; and based on a count value output from the counting means. And CTL
And CTL signal generation means for generating a signal. When detecting that the level of the tracking signal is within the range of the allowable level, the CTL signal generation means outputs the group number data from the group number acquisition means to the CTL signal. A CTL signal generating apparatus, comprising: a control unit for presetting the generating unit. 13. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, comprising: detecting one edge of the drum switching pulse until detecting track number data in the recording signal. Reference time comparison means for measuring time and comparing the measured time with a reference time; determining whether the polarity of the drum switching pulse is a polarity indicating a scanning period by a predetermined head of the plurality of heads. Comparison between the polarity detection means for detecting, the extraction means for extracting the tracking signal, and the polarity detection means The tracking signal extracted by the extracting means from a track adjacent to a recording track to be scanned by the predetermined head, which is recorded together with the recording signal when the reference time matches the measurement time, Level comparing means for comparing whether or not the level is within an allowable level; capstan frequency signal generating means for generating a capstan frequency signal corresponding to rotation of the capstan motor; Group detection means for counting a capstan frequency signal and outputting a group detection signal corresponding to a group of all tracks formed when the plurality of magnetic heads scan the magnetic tape once each; Counting means for counting the group detection signal from the means; Group number acquisition for obtaining new group number data indicating a group of all tracks formed when the plurality of magnetic heads each scan the magnetic tape once each based on the track number data extracted from the recording signal. CTL based on the count value output from the counting means
And CTL signal generation means for generating a signal. When detecting that the level of the tracking signal is within the range of the allowable level, the CTL signal generation means outputs the group number data from the group number acquisition means to the CTL signal. A CTL signal generating apparatus, comprising: a control unit for presetting the generating unit. 14. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, comprising: detecting one edge of the drum switching pulse until detecting track number data in the recording signal. Reference time comparison means for measuring time and comparing the measured time with a reference time; determining whether the polarity of the drum switching pulse is a polarity indicating a scanning period by a predetermined head of the plurality of heads. Comparison between the polarity detection means for detecting, the extraction means for extracting the tracking signal, and the polarity detection means Accordingly, when the measurement time and the reference time match, the predetermined track detected based on the polarity of the drum switching pulse is recorded together with the recording signal, and the recording track to be scanned by the predetermined head is recorded. Level comparing means for comparing whether or not the level of the tracking signal extracted from the adjacent track by the extracting means is within an allowable level; and a capstan for generating a capstan frequency signal corresponding to the rotation of the capstan motor. Frequency signal generating means, and corresponding to a group of all tracks formed when the plurality of magnetic heads scan the magnetic tape once each by counting the capstan frequency signal from the capstan frequency signal generating means. Group detection means for outputting a group detection signal to perform Counting means for counting a group detection signal from the head detection means; and a plurality of magnetic heads are formed when the plurality of magnetic heads scan the magnetic tape once each based on track number data extracted from the recording signal. Group number obtaining means for obtaining new group number data indicating a group of all tracks; and CTL based on a count value output from the counting means.
CTL signal generating means for generating a signal; and when the level comparing means detects that the level of the tracking signal is within the range of the allowable level, the track number data extracted from the recording signal. Control means for presetting the CTL signal to the CTL signal generation means. 15. A recording signal on which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generation method used in a reproducing apparatus configured to reproduce the recording signal, wherein the plurality of magnetic heads in the recording signal are each performed once after detecting an edge of the drum switching pulse. The time until the detection of group number data indicating the group of all tracks formed when the magnetic tape is scanned is measured, and the measured time is compared with a reference time. When the reference time matches, the level of the tracking signal recorded together with the recording signal is set to an allowable level. Is compared, and the group is counted from the value indicated by the group number data. Each time the count value reaches a predetermined value, the count changes from a high level to a low level or from a low level to a high level. CT
A method for generating a CTL signal, wherein an L signal is generated. 16. A recording signal on which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. A CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, wherein each of the plurality of magnetic heads in the recording signal detects one edge of the drum switching pulse after detecting one edge of the drum switching pulse.
The time until the detection of group number data indicating the group of all tracks formed when the magnetic tape is scanned each time is measured, and the measured time is compared with a reference time. Detecting whether or not the polarity indicates a scanning period by a predetermined head among a plurality of heads. If the measurement time and the reference time coincide with each other, the data is recorded together with the recording signal. The level of a tracking signal extracted from a track adjacent to a recording track to be scanned by the predetermined head is compared with an allowable level, and the group is counted from the value indicated by the group number data. Each time the count value reaches a predetermined value, the count value changes from a high level to a low level or from a low level to a high level. CT
A method for generating a CTL signal, wherein an L signal is generated. 17. A recording signal on which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generation method used in a reproducing apparatus configured to reproduce the recording signal, wherein each of the plurality of magnetic heads in the recording signal detects one edge of the drum switching pulse after detecting one edge of the drum switching pulse.
The time until the detection of group number data indicating the group of all tracks formed when the magnetic tape is scanned each time is measured, and the measured time is compared with a reference time. Detecting which of the plurality of heads has a polarity indicating the scanning period, and, based on the comparison, when the measurement time matches the reference time, detection is performed based on the polarity of the drum switching pulse. By the predetermined head, is recorded together with the recording signal, and the level of the tracking signal extracted from the adjacent track of the recording track to be scanned by the predetermined head is compared to determine whether the level is within an allowable level, The group is counted from the value indicated by the group number data, and each time the count value reaches a predetermined value, CT from low level to high level or low level to high level
A method for generating a CTL signal, wherein an L signal is generated. 18. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape, while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generating device used in a reproducing device configured to reproduce the recording signal, wherein the plurality of magnetic heads in the recording signal are respectively once after detecting an edge of the drum switching pulse. A reference time comparing means for measuring a time until detecting group number data indicating a group of all tracks formed when scanning the magnetic tape, and comparing the measured time with a reference time; When the measurement time coincides with the reference time, the tracking signal recorded together with the recording signal is used. Level comparing means for comparing whether or not the level is within the range of the allowable level, and detecting the level of the signal for tracking within the range of the allowable level, from the value indicated by the group number data. CTL signal generation means for counting the groups and generating a CTL signal from a high level to a low level or from a low level to a high level every time the count value reaches a predetermined value. Signal generator. 19. A recording signal on which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape, while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generating device used in a reproducing device configured to reproduce the recording signal, wherein the plurality of magnetic heads in the recording signal are respectively once after detecting an edge of the drum switching pulse. A reference time comparing means for measuring a time until detecting group number data indicating a group of all tracks formed when scanning the magnetic tape, and comparing the measured time with a reference time; When the measurement time coincides with the reference time, the tracking signal recorded together with the recording signal is used. Level comparing means for comparing whether or not the level is within an allowable level; capstan frequency signal generating means for generating a capstan frequency signal corresponding to the rotation of the capstan motor; and capstan frequency signal generating means. Group detection means for counting the capstan frequency signal of the above and outputting a group detection signal corresponding to a group of all tracks formed when the plurality of magnetic heads each scan the magnetic tape once each; Counting means for counting a group detection signal from the detecting means; and CTL based on a count value output from the counting means.
CTL signal generation means for generating a signal, wherein when detecting that the level of the tracking signal is within the range of the allowable level, presetting the group number data to the CTL signal generation means Means for generating a CTL signal. 20. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. A CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, wherein each of the plurality of magnetic heads in the recording signal detects one edge of the drum switching pulse after detecting one edge of the drum switching pulse.
Reference time comparison means for measuring a time until detecting group number data indicating a group of all tracks formed when the magnetic tape is scanned each time, and comparing the measured time with a reference time; Polarity detecting means for detecting whether or not the polarity of the pulse is a polarity indicating a scanning period by a predetermined head among the plurality of heads; extracting means for extracting the tracking signal; and the polarity detecting means When the reference time coincides with the measured time, the tracking time extracted by the extracting means from a track adjacent to a recording track to be scanned by the predetermined head and recorded together with the recording signal when the reference time matches. Level comparing means for comparing whether or not the level of the signal of the capstan motor is within a range of an allowable level; A capstan frequency signal generating means for generating a capstan frequency signal corresponding to the rotation; a capstan frequency signal from the capstan frequency signal generating means being counted, and the plurality of magnetic heads each of the magnetic heads once each Group detection means for outputting a group detection signal corresponding to a group of all tracks formed when scanning; counting means for counting group detection signals from the group detection means; and count value output from the counting means. Based on CTL
CTL signal generation means for generating a signal, wherein when detecting that the level of the tracking signal is within the range of the allowable level, presetting the group number data to the CTL signal generation means Means for generating a CTL signal. 21. A recording signal recorded with a tracking signal superimposed thereon so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. A CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, wherein each of the plurality of magnetic heads in the recording signal detects one edge of the drum switching pulse after detecting one edge of the drum switching pulse.
Reference time comparison means for measuring a time until detecting group number data indicating a group of all tracks formed when the magnetic tape is scanned each time, and comparing the measured time with a reference time; Polarity detecting means for detecting whether or not the polarity of the pulse is a polarity indicating a scanning period by a predetermined head among the plurality of heads; extracting means for extracting the tracking signal; and the polarity detecting means When the measured time coincides with the reference time, the predetermined head detected based on the polarity of the drum switching pulse is recorded together with the recording signal and scanned by the predetermined head. The level of the tracking signal extracted from the track adjacent to the recording track by the extracting means is an allowable level. Level comparing means for comparing whether or not it is within the range, a capstan frequency signal generating means for generating a capstan frequency signal corresponding to the rotation of the capstan motor, and a capstan frequency signal from the capstan frequency signal generating means Group detection means for outputting a group detection signal corresponding to a group of all tracks formed when the plurality of magnetic heads scan the magnetic tape once each time, and a group from the group detection means. Counting means for counting the detection signal; and CTL based on a count value output from the counting means.
CTL signal generating means for generating a signal, wherein when the level comparing means detects that the level of the tracking signal is within the range of the allowable level, the group number data extracted from the recording signal Control means for presetting the CTL signal to the CTL signal generation means. 22. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by switching drum switching pulses. And a CTL signal generation method used in a reproducing apparatus configured to reproduce the recording signal, wherein a time from detection of an edge of the drum switching pulse to detection of track number data in the recording signal is determined. The measured time is compared with a reference time, and the level of the tracking signal recorded together with the recording signal when the measured time matches the reference time is within an allowable level. Are formed when the plurality of magnetic heads each scan the magnetic tape once each time The group is counted from the value indicated by the group number data in the recording signal, which indicates the group of all tracks. Each time the count value reaches a predetermined value, the count is changed from high level to low level or from low level to high level. Become CT
A method for generating a CTL signal, wherein an L signal is generated. 23. A recording signal recorded with a tracking signal superimposed thereon so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, comprising: detecting one edge of the drum switching pulse until detecting track number data in the recording signal. Measuring the time, comparing the measured time with a reference time, detecting whether or not the polarity of the drum switching pulse is a polarity indicating a scanning period by a predetermined head of the plurality of heads; Thus, when the measured time and the reference time match, the predetermined head recorded together with the recording signal Comparing the level of a tracking signal extracted from a track adjacent to a recording track to be scanned with the magnetic tape within a range of an allowable level, and when the plurality of magnetic heads scan the magnetic tape once each time The group is counted from the value indicated by the group number data in the recording signal, which indicates the group of all tracks formed in the recording signal. Each time the count value reaches a predetermined value, the level is changed from high level to low level or low level. To high level from
A method for generating a CTL signal, wherein an L signal is generated. 24. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, comprising: detecting one edge of the drum switching pulse until detecting track number data in the recording signal. Measuring the time, comparing the measured time with a reference time, detecting whether the polarity of the drum switching pulse is a polarity indicating a scanning period by which of the plurality of heads is a scanning period. When the measurement time matches the reference time, a predetermined value detected based on the polarity of the drum switching pulse is used. Comparing the level of the tracking signal recorded from the adjacent track of the recording track to be scanned by the predetermined head with the recording signal by the head of the recording head within a range of an allowable level; The magnetic head scans the magnetic tape once each time, and the group is counted from the value indicated by the group number data in the recording signal, which indicates the group of all tracks formed when the magnetic tape scans the magnetic tape. Each time the value changes, the CT changes from high level to low level or from low level to high level.
A method for generating a CTL signal, wherein an L signal is generated. 25. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by switching drum switching pulses. And a CTL signal generation device used in a reproduction device configured to reproduce the recording signal, wherein a time from when an edge of the drum switching pulse is detected to when track number data in the recording signal is detected is determined. Reference time comparing means for measuring and measuring the measured time with a reference time; and a level of the tracking signal recorded together with the recording signal when the measured time and the reference time match by the comparison. Level comparing means for comparing whether or not the level is within an allowable level; A group number in the recording signal indicating a group of all tracks formed when the plurality of magnetic heads scan the magnetic tape once each time when it is detected that the magnetic tape is within the allowable level range. CTL signal generation means for counting the group from the value indicated by the data and generating a CTL signal from a high level to a low level or from a low level to a high level every time the count value reaches a predetermined value. A CTL signal generation device characterized by the above-mentioned. 26. A recording signal in which a tracking signal is superimposed and recorded so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generating device used in a reproducing device configured to reproduce the recording signal, wherein a time from when an edge of the drum switching pulse is detected to when track number data in the recording signal is detected is determined. A reference time comparing means for measuring and measuring the measured time with a reference time; and a level of the tracking signal recorded together with the recording signal when the measured time and the reference time match by the comparison. Level comparing means for comparing whether or not the pressure is within an allowable level, and a key corresponding to the rotation of the capstan motor. A capstan frequency signal generating means for generating a capstan frequency signal; forming a capstan frequency signal from the capstan frequency signal generating means when the plurality of magnetic heads scan the magnetic tape once each time Group detection means for outputting a group detection signal corresponding to a group of all tracks to be read, counting means for counting the group detection signal from the group detection means, and CTL based on the count value output from the counting means.
And a CTL signal generating means for generating a signal. When detecting that the level of the tracking signal is within the range of the allowable level, the plurality of magnetic heads respectively execute the magnetic tape once each. Control means for presetting group number data in the recording signal, which indicates a group of all tracks formed upon scanning, in the CTL signal generation means.
Signal generator. 27. A recording signal recorded with a tracking signal superimposed thereon so as to form an inclined track on a magnetic tape while scanning a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a CTL signal generating method used in a reproducing apparatus configured to reproduce the recording signal, comprising: detecting one edge of the drum switching pulse until detecting track number data in the recording signal. Reference time comparison means for measuring time and comparing the measured time with a reference time; determining whether the polarity of the drum switching pulse is a polarity indicating a scanning period by a predetermined head among the plurality of heads; Comparison between the polarity detection means for detecting, the extraction means for extracting the tracking signal, and the polarity detection means The tracking signal extracted by the extracting means from a track adjacent to a recording track to be scanned by the predetermined head, which is recorded together with the recording signal when the reference time matches the measurement time, Level comparing means for comparing whether or not the level is within an allowable level; capstan frequency signal generating means for generating a capstan frequency signal corresponding to rotation of the capstan motor; Group detection means for counting a capstan frequency signal and outputting a group detection signal corresponding to a group of all tracks formed when the plurality of magnetic heads scan the magnetic tape once each; Counting means for counting the group detection signal from the means; Based on the count value output from the counting means CTL
And a CTL signal generating means for generating a signal. When detecting that the level of the tracking signal is within the range of the allowable level, the plurality of magnetic heads respectively execute the magnetic tape once each. A CTL signal generation device, comprising: a control unit for presetting the group number data in the recording signal, which indicates a group of all tracks formed upon scanning, in the CTL signal generation unit. 28. Scanning a recording signal recorded with a tracking signal superimposed thereon so as to form an inclined track on a magnetic tape while switching a plurality of magnetic heads mounted on a rotating drum by drum switching pulses. And a method for generating a CTL signal used in a reproducing apparatus configured to reproduce the recording signal, wherein a time period from when one edge of the drum switching pulse is detected to when the recording signal is detected is measured. A reference time comparing means for comparing the measured time with a reference time; and a polarity detecting whether or not the polarity of the drum switching pulse is a polarity indicating a scanning period by a predetermined head of the plurality of heads. Detecting means, extracting means for extracting the tracking signal, and comparing the polarity detecting means, And a predetermined head detected based on the polarity of the drum switching pulse when the reference time coincides, is recorded together with the recording signal, and is extracted from a track adjacent to a recording track to be scanned by the predetermined head. Level comparing means for comparing whether or not the level of the tracking signal extracted by the means is within a range of an allowable level; and capstan frequency signal generating means for generating a capstan frequency signal corresponding to the rotation of the capstan motor. The capstan frequency signal from the capstan frequency signal generating means is counted, and a group detection signal corresponding to a group of all tracks formed when the plurality of magnetic heads scan the magnetic tape one by one each is obtained. A group detecting means for outputting, and a group from the group detecting means. Counting means for counting a loop detection signal; and CTL based on a count value output from the counting means.
CTL signal generating means for generating a signal, and when the level comparing means detects that the level of the tracking signal is within the range of the permissible level, the plurality of magnetic heads each one time The group number data in the recording signal indicating the group of all the tracks formed when the magnetic tape is scanned is replaced with the C number.
A CTL signal generation device, comprising: a control unit for presetting the TL signal generation unit.