JPS6028042B2 - Information magnetic recording/reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides at least one piece of main information and at least one piece of auxiliary information on a magnetic tape that can be transported in the longitudinal direction. A main information track and an auxiliary information track are respectively formed and recorded, with their base ends on the starting line perpendicular to the longitudinal direction of the magnetic tape, and the main information and auxiliary information to be recorded on this magnetic tape are recorded. The present invention relates to an information magnetic recording/reproducing device that reproduces reproduction book information and reproduction auxiliary information, respectively.

First, in order to facilitate understanding of the present invention, a conventional information magnetic recording/reproducing device, which is the basis of the present invention, will be described. During recording, a conventional information magnetic recording/reproducing device records, for example, eight pieces of information SA, SA2...S on a magnetic tape T that can be transported in the longitudinal direction, as shown in FIG. are fixedly arranged on the common array line LC perpendicular to the longitudinal direction of the magnetic tape T, and are arranged in the extension direction by eight main information recording magnetic heads HA, HA2, ... HA8 shown by chain lines. The main information tracks BA, BA2, . In addition, for example, one piece of auxiliary information SB is fixedly arranged on the above-mentioned common array line LC on the side opposite to the main information track BA2 side of the main information track BA. On the information green magnetic field, an auxiliary information track BB whose extension direction is the longitudinal direction of the magnetic tape T and whose starting end f is on the above-mentioned starting end line LF is formed and recorded in the same way as described above. do.

In this case, this information track BAi (i=1, 2,...
...8) and the terminal e of the auxiliary information track BB is
They each exist on a termination line LE parallel to the start line LF, which is perpendicular to the longitudinal direction of the magnetic tape T and is spaced apart from the start line LF described above.

Such records are actually obtained from the main information input terminal UAi and the auxiliary information input terminal UB, respectively, as shown in FIG.

For example, original information Ai in the form of an analog signal, such as physical quantity measurement information, and original auxiliary information CB, which is also in the form of an analog signal, related thereto are supplied to information processing circuits MAj and MB each having a frequency modulator configuration, for example. From these, information DAi and DB are obtained which are frequency-modulated by carrier wave information CAi and CB, respectively, and these information DAi and DB are outputs QA and QB of flip-flop configuration control circuits KAi and KB, respectively. is supplied to the switch circuits WAi and WB which are controlled on and off by the switch circuits WAi and WB,
The information OAi and DB obtained in these ON periods are used as the main information SAj and the auxiliary information SB, respectively, by the amplifier A.
This is done by supplying the magnetic tape T via the magnetic heads HAi and HB to the magnetic heads HAi and HB, which support the magnetic tape T as described above. In this case, switch circuits WAi and W
The on/off state of B is controlled by control signals QA and QB in relation to the transport control of the magnetic tape T as follows.

That is, the magnetic tape T receives a magnetic tape transfer start pulse (
This is referred to as XF), the magnetic tape T
A magnetic tape drive mechanism (not shown) is configured to stop the transfer of the magnetic tape T by receiving a magnetic tape transfer stop pulse (hereinafter referred to as XE) from the cutting state. Driven. Therefore, the magnetic tape T has the magnetic tape transfer start pulse XF at the third
As shown in FIG. 3A, as shown in FIG.
2, the magnetic tape is transferred at a predetermined transfer speed, and the magnetic tape stop pulse XE is obtained at time t3, which is two times later as shown in FIG. 3B, so that the transfer is stopped from time t3. The transfer will start and then stop. On the other hand, outputs QA and QB of control circuits KA and KB are supplied to one input side of these control circuits KA and KB via control pulse input terminals UFA and UFB, respectively, from a time point or a slightly delayed time point. '(In the figure, time t2'
), as shown in FIG. 3 DA and DB, the recording start control pulses PFA and PFB are supplied, and as shown in FIG. Based on this, the switch circuit W
Ai and WB are controlled to be on from the beginning, as shown in FIG. 3, FAi and FB.

In addition, from the state where the outputs QA and QB are connected to the control circuit KA
and a control pulse input terminal U on the other input side of KB, respectively.
via E, a time point slightly earlier than time points et al. or time point t3 (
In the figure, by supplying the recording stop control pulse PE as shown in FIG. 3G at time point 3), the binary display is displayed from time point t3 as shown in FIG. 3 EA and EB. "0
Based on this, the switch circuits WAi and WB are controlled to be turned off from time to time, respectively, as shown in FIG. 3 FAi and FB. Therefore, the lengths of the main information track BAi and the auxiliary information track BB on the magnetic tape T are obtained by the length that the magnetic tape T can transport during the period from time ' to t3. Truck BAi
The starting end f and the ending end e of and BB are on the starting end line LF and the ending end line LE, respectively, as described above. In practice, the above-mentioned recording is performed sequentially, and after the above-mentioned tracks BAi and BB are obtained on the magnetic tape T, the magnetic tape is recorded from the termination line LE at the time between t3 and [4]. The length that the tape T can be transported and the above-mentioned point ~t
The starting end is on the next starting end line LF, which is the sum of the length that the magnetic tape can be transferred between 2'. Tracks similar to tracks BAi and BB described above are obtained. Also,
The secondary information magnetic recording/reproducing device uses a magnetic tape on which the above-mentioned main information SAi and auxiliary information SB are recorded by forming a main information track BAi and an auxiliary information track BB, respectively, during reproduction. The main information SAi and the auxiliary information SB to be recorded on the magnetic tape T are transferred, for example, to a common array line L parallel to the common array line LC mentioned above.
This information reproducing magnetic head HA is fixedly arranged on C'.
i' and the auxiliary information reproduction head HB' are used to reproduce the main information SAi' and the auxiliary information SB', respectively.

In practice, the reproduced main information SAi' and the reproduced auxiliary information SB that are reproduced sharply are processed as follows.

That is, as shown in FIG. 4, the above-mentioned magnetic tape is transferred, and the reproduced main information SAi' and the reproduced auxiliary information SB', which are reproduced from the magnetic tape using the magnetic heads HAr and HB, are transferred to the amplifier AAi', respectively. and AB', for example, to the main information processing circuit MAi' and the auxiliary information processing circuit MB', which have a frequency demodulator configuration, and from these, the original data obtained at the input terminals UAi and UB during recording. Information C
Information outputs having the same contents as Ai and the original auxiliary information CB are obtained as the main information processing output CAi' and the auxiliary information processing output CB', respectively, and these are connected to one fixed contact side of the switching circuits WAi' and WB', respectively. It is applied to the output lines UAi' and UB' for this information.

On the other hand, the output lines UAi' and UB' each have a switching circuit W.
A main information reference potential CAi and an auxiliary information reference potential GB, which are ground potentials, for example, are applied via the other fixed contact side of Ai' and WB'.

In this case, for example, the information S obtained by the intensifier AA,'
A,' is supplied to the detection circuit J, from which the information SA
If , ' exists, it is displayed as "1" in binary display, and if it does not exist, it is "2".
A detection output R exhibiting "0" is obtained in the value display, and if it is "1" at this detection output R, outputs CAi' and CB' are given to the output lines UAi' and UB', respectively, and the output becomes "0". ”
In this case, the switching circuits WAi' and WB' are controlled to apply the reference potentials GAi and GB to the output lines UAi' and UB', respectively. Therefore, during reproduction, the magnetic heads HAi′ and H
If tracks BAi and BB on the magnetic tape T exist at the arrangement position B', outputs CAj' and CB' based on the main reproduction information SAi' and the reproduction auxiliary information SB are output to the output line U, respectively.
Track BA on the magnetic tape T is located at the arrangement position of the magnetic heads HAi' and HB'.
When i and BB cease to exist, and correspondingly, reproduction main information SAi' and reproduction auxiliary information GB' also disappear, reference potentials GAi and 3 are applied to output lines UAi' and UB', respectively.

However, if tracks BAi and BB on the magnetic tape T no longer exist at the arrangement positions of the magnetic heads HAi' and HB', the reference potential G is applied to the output lines UAi and UB', respectively.
The fact that Ai and GB are given means that the output terminals of the processing circuits MAi' and MB' are always connected to the output line UA.
Since tracks BAi and BB on the magnetic tape T no longer exist at the arrangement positions of the magnetic heads HAi' and HB', the output is output to the output lines UAi' and UB'. When CAi' and CB' disappear, the output terminals of processing circuits MAi' and Mold'
This absence of processing circuit MAi' and MB' input information results in a harsh noise that can be mistaken for outputs CAi' and CB', which in turn causes output lines UAi' and UB'
′ will be given unnecessarily.

The effect of masking the noise with the reference potentials GAi and GB applied to the output lines UAi' and UB' is obtained, and as a result, the output CAi is applied to the output lines UAr and UB'.
This means that it does not give any trailing noise that can be mistaken for ' and CB'. The above is the conventional information magnetic recording/reproducing device that forms the basis of the present invention.

According to such an information magnetic recording/reproducing device, the main information SAi and the auxiliary information SB are stored on the magnetic tape T, with the extension direction being the longitudinal direction of the magnetic tape T, and the starting end f and the ending end e being respectively on the magnetic tape T. The main information track BAi and the auxiliary information track BB can be formed and recorded on the start line LF and the end line LE perpendicular to the longitudinal direction of the main information S.
Using a magnetic tape T that can record Ai and auxiliary information SB, main information SAi and auxiliary information S are recorded from this magnetic tape T.
B can be reproduced as reproduced main information SAi' and auxiliary information SB', respectively, and furthermore, the thus reproduced information SAi' and S
The processing outputs CAi' and CB' of B' are connected to the output line UA, respectively.
It is clear that i' and UB' can be supplied.

Furthermore, when the processing outputs CAi' and CB' disappear during reproduction, the reference potentials GAi and GB are applied to the output lines UAi' and UB', and therefore, the output lines UAi' and U
B has the characteristic that even if the processing outputs CAi' and CB' are no longer provided, a blurred noise that can be mistaken for the processing outputs CAi' and CB' is not provided.

However, when using the conventional information magnetic recording/reproducing apparatus described above, during reproduction, the magnetic head HAi'
As a result, based on the output R of the detection circuit J, the regenerated original information SAj' can no longer be obtained.
B' is controlled so that reference potentials GAi and GB are applied to output lines UAi' and UB'.

From the time when the reproduced book information SAi′ can no longer be obtained,
It is undeniable that a certain amount of time (this is called response time) is required until the reference potentials GAi and GB are actually applied to the output lines UAi' and UB'. T), the output line UA
None of the outputs CAir and CB' and the reference potentials GAi and GB are applied to i' and UB', therefore, the output lines UAi' and UB' have a
This provides a vague noise that can be mistaken for the processing outputs CAi' and CB'. Therefore, in the case of the above-mentioned conventional information magnetic recording/reproducing device, when reproducing, the output line U
Even if the processing outputs CAi' and CB' are eliminated from Ai' and UB', the characteristic that high-level noise that can be mistaken for the outputs CAi' and CB' is not provided is not fully satisfied.

Therefore, the present invention provides a novel information magnetic recording and reproducing method that fully satisfies the characteristic that the output line UAi' is not given a desirable noise that can be mistaken for the output line CAi'. The purpose is to propose a device.
The following will become clear from the description of embodiments of the information magnetic recording/reproducing apparatus according to the present invention.

In the embodiment of the information magnetic recording/reproducing apparatus according to the present invention, during recording, as shown in FIG. 5, in which parts corresponding to those in FIG. Similarly, main information SAi and auxiliary information SB are transferred onto a magnetic tape that can be transported in the longitudinal direction using magnetic heads HAi and HB, respectively.
Track BA for this information where the start end f is both on the start end line LF
j and auxiliary information track BB are formed and recorded, but the end e of the auxiliary information track BB is located on the start line LF side of the end line LE where the end c of the main information track BAi is arranged. It lies on the terminal line LE' which is parallel to the line LE.

Therefore, the distance between the terminal lines LE and LE' in this case is
In the subordinate information magnetic reproducing device described above in FIG.
In FIG. 4, the response time corresponding to the response time T mentioned above is
That is, from the point in time when the reproduction auxiliary information SB' obtained by reproduction from the auxiliary information reproduction magnetic head HB' in the information magnetic reproduction apparatus described below no longer exists, the main information output line UAi' due to this ceases to exist. and auxiliary information output line UB
', the interval is selected such that a time T' that is approximately equal to, or slightly longer than, the response time up to the point in time when the main information reference potential GAi and the auxiliary information reference potential GB are applied, respectively, is obtained. ing.

In practice, such a record is obtained via the control pulse input terminal UE in the configuration of FIG. 2, as shown in FIG. As shown in FIG. 7G, the stop control pulse PE is obtained from the time t3 mentioned above in FIG. is supplied to a delay circuit Z which gives a delay of response time T' to
The exception is that a control pulse PE' for stopping recording is supplied to one input side of the control circuit KA, as shown in FIG. 7G, which is delayed by minutes with respect to the pulse PE obtained from the delay circuit Z. This is done in the same manner as in the case of FIG.

In addition, Fig. 7 A, B, C, DA, DB, EA, EB, FA
i and FB are respectively A, B, C, DA, EA, and E in Figure 3.
B. Control pulse XF for starting magnetic tape transfer, control pulse XE for stopping magnetic tape transfer, transfer status of magnetic tape T, control pulse PFA for starting recording, control pulse PFB for starting recording, and control pulse shown corresponding to FAi and FB. Q.A.
The control output QB, the on/off control state of the switch circuit WAi, and the on/off control state of the switch circuit WB are shown, respectively. Furthermore, in the embodiment of the information magnetic recording/reproducing apparatus according to the present invention, during reproduction, as described above in FIG. The magnetic tape T on which the information track BB is formed and recorded is transferred, and the main information SAi and the auxiliary information SB are thereby recorded in the same manner as described for the subordinate information magnetic recording/reproducing device described above. , are reproduced as the reproduced book information SAi' and the reproduction auxiliary information SB', respectively, and in fact, the reproduced main bridge information S heart' which is reproduced sharply.
As shown in FIG. 8, in which parts corresponding to those in FIG. 4 are given the same reference numerals, the input of the detection circuit J is From the reproduction book information SAi' obtained by reproduction from the reproduction magnetic head HA',
The configuration is the same as that shown in FIG. 4, except that the reproduction auxiliary information SB' obtained by reproduction from the auxiliary information reproduction magnetic head HB is used instead.

Therefore, during reproduction, if tracks BAi and BB on the magnetic tape T exist at the arrangement positions of the magnetic heads HAi' and HB', the outputs CAi' and CB that block the reproduction main information SAi' and the reproduction auxiliary information SB are ' are obtained on the output lines UAi' and UB', respectively, and even if the track BB on the magnetic tape T does not exist at the arrangement position of the magnetic head HB', the arrangement position of the magnetic head HAr is obtained. , has a section in which the track BAi on the magnetic tape T exists, and in this section, the output CAi' that blocks the reproduced original information SAi' is
If the track BB on the magnetic tape T does not exist at the arrangement position of the magnetic head HB even though the output line UAi'
' is no longer obtained on the output line UB', and the output R of the detection circuit J becomes "1", so that the switching circuit WAi'
and WB' are controlled to switch output lines UAi' and UB'.
' are given reference potentials GAi and GB, respectively. By the way, in this case, the end e of the track BB on the magnetic tape T is on the start end f side with respect to that of the track BAi,
Since the interval between them is such that the above-mentioned response time T' should be obtained, regarding the output line UB', after the output line CB' is no longer obtained, the above-mentioned response time T' Although the reference potential GB is applied after passing through the output line UAi', the reference potential GAi is applied to the output line UAi' from the time when the output CAi' is no longer obtained or from a time slightly before that, and therefore, Regarding the output line UAi', there is no chance that it will be subjected to a level of noise that could be mistaken for the output CAi'.

The above is an embodiment of the information magnetic recording/reproducing apparatus according to the present invention. According to the information magnetic recording/reproducing apparatus, similar to the above-mentioned conventional information magnetic recording/reproducing apparatus, the magnetic tape T Above, the main information SAi and the auxiliary information SB are respectively extended in the longitudinal direction of the magnetic tape T, and the starting end f and the ending end e are respectively a starting end line LF that is orthogonal to the longitudinal direction of the magnetic tape T.
and the main information track B placed on the terminal lines LE and LE'
Using a magnetic tape T that can form and record Ai and BB and also record the main information SAi and auxiliary information SB, the main information SAi and the auxiliary information SB are reproduced from this magnetic tape T, respectively. As the main information S mountain' and reproduction auxiliary information SB, the processed outputs C mountain' and CB' of the information SAi' and SB', which can be reproduced and thus reproduced, are connected to the output line U, respectively.
Ai′ and UB′, and during playback, the processing output C
When the peaks' and CB' disappear, the output lines UAi' and UB
' are given the reference potentials GM and GB, and therefore, the output lines UAi' and UB' during reproduction are provided with the processed output CAi'
Even if CB' and CB' are no longer provided, a healthy noise that can be mistaken for the processing outputs C' and CB' is not provided. In particular, during playback, Processing output CAi' is output to output line UAi'
disappears and the reference potential GAi is applied, the time point at which the reference potential GAi is applied is the processing output CAi'
Since the output line UAi' is at or slightly before the point in time when the output line UAi' disappears, the characteristic that the output line UAi' is not given any sloping noise that can be mistaken for the output CAi' is sufficiently satisfied. It is.

Therefore, according to the information magnetic recording/reproducing apparatus according to the present invention, the characteristic that the output line UAn is not given a coherent noise that can be mistaken for the output C peak' is sufficiently achieved. To the extent that this is satisfied, the magnetic information recording/reproducing apparatus can be said to be superior to conventional information magnetic recording/reproducing apparatuses.

In the above, during reproduction, the processing outputs CAi' and CB' and the reference potential GAi are applied to the output lines U~' and UB', respectively.
and GB, the processing circuit MAi′
We have described the case where the switching circuits WAi' and WB' are inserted between the output lines UAi' and MB' and the output lines UAi' and UB', respectively. As shown in FIG. 9, in the configuration of FIG. 8, the switching circuits WAi' and WB' are omitted, and the output terminals of the processing circuits MAi' and MB' are directly connected to the output lines UAi' and UB', respectively. However, the information SAi' and SB' obtained from the intensifiers AAi' and AB' are transmitted through one fixed contact side of the switching circuits WAi'' and WB'' similar to the switching circuits W~' and W8, respectively. is supplied to processing circuits MAi' and Mold', and on the other hand, to processing circuits MAi' and MB', via the other fixed contact sides of switching circuits WAi'' and WB'', respectively.
Carrier peaks i and IB obtained from oscillators LAi and LB
are supplied, and in this case, the frequencies of the carrier waves Mi and IB bounded by the oscillators LM and LB are the same as those of the processing circuits when the carrier waves IAi and IB are supplied to the processing circuits MN' and MB', respectively. Except that the processing outputs C' and CB' obtained from MAi and MB' are selected to be approximately equal to the reference potentials GAi and GB mentioned above in FIG. It is clear that even with a configuration similar to that shown in FIG. 8, the same effects as those described above in FIG. 8 can be obtained. This information SA,,SA2...
. . . SA8 and one auxiliary information SB are respectively recorded on eight main information tracks BA, BA2, . . . B, forming one auxiliary information track BB, Also, using the magnetic tape T on which the main information SAi and the auxiliary information SB can be recorded, the main information SAi and the auxiliary information SB can be reproduced from the main information SAi' and the reproduction auxiliary information SB, respectively.
Although the case of reproduction has been described as ', the main information SAi and the auxiliary information SB in this case can each be an arbitrary number of 1 or more.

Furthermore, in the above, during recording and reproduction, the recording magnetic heads HAi and HB and the reproducing magnetic head HAi
Although the case has been described in which two sets of magnetic heads ' and HB' are used, these may be used as one set of recording/reproducing magnetic heads, and various other modifications may be made.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing tracks on a magnetic tape bound by a conventional information magnetic recording/reproducing device.

FIG. 2 is a system diagram showing a recording system of a conventional information magnetic recording/reproducing device. FIG. 3 is a waveform diagram for explaining this. FIG. 4 is a system diagram showing a reproducing system of a conventional information magnetic recording/reproducing apparatus. FIG. 5 is a schematic diagram showing tracks on a magnetic tape obtained by the information magnetic recording/reproducing apparatus according to the present invention. FIG. 6 is a system diagram showing an example of the recording system of the information magnetic recording/reproducing apparatus according to the present invention. FIG. 7 is a waveform diagram for explaining this. FIG. 8 is a system diagram showing an example of a reproducing system of the information magnetic recording/reproducing apparatus according to the present invention. FIG. 9 is a system diagram showing another example of the reproducing system of the information magnetic recording/reproducing apparatus according to the present invention.
T...Magnetic tape, HAi (i=1, 2...8)
... Recording magnetic head for main information, HB... Recording magnetic head for auxiliary information, BAi... Track for main information, BB... Track for auxiliary information, LF...
・Starting line, LE. LE′...Last line, UAi
...Input terminal for this information, UB...Input state for auxiliary information, MAi, MAi'...This information processing circuit, M
B, MB...Auxiliary emotion processing circuit, W nail, WB...
...Switch circuit, KA, KB...Control circuit, HAr
...Main information playback head, HB...Auxiliary information playback head, WAi', WB'...Switching circuit, J...
・Detection circuit, UAi'...This information output line, UB
'...Auxiliary information gate output line, Z...Delay circuit, L
Ai, LB...Oscillator.

Figure 1 Figure 5 Figure 2 Figure 3 Figure 4 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. On a magnetic tape that can be transferred in the longitudinal direction, at least one piece of main information and at least one piece of auxiliary information are fixed on a common array line perpendicular to the longitudinal direction of the magnetic tape, respectively. The main information recording/reproducing or recording magnetic head and the auxiliary information recording/reproducing or recording magnetic head arranged in such a manner that the extension direction is the longitudinal direction of the magnetic tape and the starting end is both the longitudinal direction of the magnetic tape. A main information track and an auxiliary information track are respectively formed and recorded on orthogonal start lines, and the main information and auxiliary information to be recorded on the magnetic tape are respectively formed and recorded on the main information recording/reproducing track. Or, in an information magnetic recording/reproducing device that reproduces main information for reproduction and auxiliary information for reproduction using a magnetic head for reproduction and a magnetic head for recording/reproducing the above-mentioned auxiliary information, by a control pulse for starting recording of this information. , the information is started to be supplied to the information recording/reproducing or recording magnetic head such that the starting edge of the information track is on the starting edge line, and the information recording stop control pulse is used to The information is supplied to the information recording/reproducing or recording magnetic head such that the end of the information track is on a first end line perpendicular to the longitudinal direction of the magnetic tape. This information supply means to be stopped;
The auxiliary information recording start control pulse obtained at the same time as the main information recording start control pulse causes the auxiliary information to be recorded so that the start end of the auxiliary information track is on the start line. The auxiliary information is started to be supplied to the reproducing or recording magnetic head, and the auxiliary information is recorded by the auxiliary information recording stop control pulse obtained a predetermined response time before the main information recording stop control pulse. , the end of the auxiliary information track is closer to the start line than the first end line by a distance corresponding to the response time. Auxiliary information supply means for recording/reproducing the auxiliary information or stopping the supply of the information to the recording magnetic head so as to exist on a second end line perpendicular to the longitudinal direction of the magnetic tape; or a book that processes the reproduced book information and the reproduction auxiliary information obtained by reproduction from the magnetic head for reproduction and the magnetic head for recording/reproducing or reproducing the auxiliary information as the main information processing output and the auxiliary information processing output, respectively. an information processing circuit and an auxiliary information processing circuit;
an output line for main information to which the main information processing output obtained by processing by the main information processing circuit and a reference potential for main information are selectively applied; and the above-mentioned auxiliary information obtained by processing by the auxiliary information processing circuit. If the processing output and reference potential for auxiliary information exist based on the auxiliary information output line to which they are selectively given, and the reproduction auxiliary information obtained by reproducing from the auxiliary information recording/reproducing or reproducing magnetic head, 2. "1" in the value display, if this does not exist, "0" in the binary display
When the detection output is "1", the main information processing output and the auxiliary information processing output are sent to the main information output line and the auxiliary information output line, respectively.
0'', the detection control means controls to provide the reference potential for main information and the reference potential for auxiliary information, and the response time is reproduced by the magnetic head for recording and reproducing the auxiliary information. From the point in time when the reproduction auxiliary information obtained by this process no longer exists, the main information reference potential and the auxiliary information reference potential are applied to the main information output line and the auxiliary information output line, respectively. An information magnetic recording/reproducing device characterized in that the time is selected to be approximately equal to or slightly longer than the previous time.