JP3067447B2 - Video signal recording or playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for efficiently recording and reproducing a plurality of types of video signals having different signal formats and bands, or for efficiently recording and reproducing the same type of video signals in different systems.

[0002]

2. Description of the Related Art In a recording / reproducing apparatus such as a video tape recorder for recording / reproducing a video signal, a wide band having a band of about 20 MHz such as a high definition video signal is used as a plurality of types of video signals having different signal formats and bands. A baseband video signal (hereinafter referred to as a first video signal);
For example, 10 MHZ which is narrower than the first video signal and is 帯 域.
As a method of selectively recording and reproducing any one of video signals such as the MUSE system (hereinafter, referred to as a second video signal) band-compressed to about z, the first video signal, the second video signal, The relative speed of the tape and the head at the time of recording is changed. Specifically, the relative speed at the time of recording the second video signal is reduced to half the relative speed at the time of recording the first video signal. A method described in Japanese Patent Application Laid-Open No. 1-265681, in which recording is performed so that the recording wavelengths become substantially constant, is known.

However, in this conventional method, sufficient consideration is not given to a signal processing method and a recording method when the number of effective scanning lines and the signal format are different between the first video signal and the second video signal. Was.

[0004]

If the number of effective scanning lines and the signal format of the first video signal and the second video signal having different bands are different from each other, signal processing for recording and reproduction is performed by another system. Required, and the circuit scale increased significantly,
The cost has also increased, making practical use difficult.

In view of the above, it is an object of the present invention to set a recording parameter of a plurality of video signals having different bands and different signal formats so that most of the signal processing circuits can be used in common. An object of the present invention is to provide an apparatus capable of recording and reproducing without increasing the circuit scale.

[0006]

In order to achieve the above object, according to the present invention, when the first video signal is recorded, the first video signal is sampled from the first video signal, and S1 signals per line are sampled. A first recording video signal is generated in units of lines (or in units of blocks including data of k1 sampled pixels per block) including the sampled pixels of
The recording video signal is divided into M (M is an integer) channels in field units, and each channel is divided into N (N is an integer) segments, and M × M × N
It is divided into N tracks (M.times.N.times.2 per frame) and recorded, and each track is converted to the number of lines by L1 (or converted to the number of blocks by NB1).
Is processed so as to record the signals of the same number.

When the second video signal is recorded, the second video signal is sampled from the second video signal, and is sampled on a line-by-line basis including S2 sampled pixels per line (or k2 pixels per block). And generates a second recording video signal (in units of blocks) including the data of the sampled pixels in accordance with a ratio m of a band (or information amount) in which the first recording video signal and the second recording video signal are recorded. The second recording video signal is divided into M × N / m tracks per field (M × N × 2 / m tracks per frame) and recorded, and each track is converted into the number of lines. L2 (or NB2 in terms of the number of blocks) signals.

At this time, assuming that the number of scanning lines per frame of the first and second video signals is L, the above parameters are L2 = L1 × S1 / S2, S1 ≧ S2 × m or NB2 = NB1 × k1 / K2 is set.

Further, the recording and reproducing are performed with the tape speed at the time of recording the first video signal set to substantially m times the tape speed at the time of recording the second video signal.

[0010]

[Function] The number of lines L1, which are parameters of the above recording,
The relationship between L2 (or the number of blocks NB1, NB2), the number of sampled pixels S1, S2 (or k1, k2), and the number of track divisions M, N per field is represented by the digital value of the first video signal. This is realized by setting the frequency of the clock used for signal processing to be m times the frequency of the clock used for digital signal processing of the second video signal. Thereby, most of the digital signal processing means for the first video signal and the digital signal processing means for the second video signal can be used in common, and an increase in circuit scale can be avoided. The video signal can be efficiently recorded and reproduced with the same performance by one device. Also, the recording time of the second video signal can be made m times longer than the recording time of the first video signal, and m>
When set to 1, a so-called long-time recording function can be realized with a slight increase in cost, and an economic effect can be obtained.

[0011] Further, the plurality of types of video signals can be recorded by a common recording method of either analog recording or digital recording, or the recording method is changed for both, and one of them is recorded analog and the other is recorded. Can be digitally recorded. In particular, according to this latter method, 1
With one device, the same type of video signal can be recorded in different modes in which the image quality is changed according to the application, and the added value of the device can be further increased.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a video signal recording / reproducing apparatus according to an embodiment of the present invention when selectively recording and reproducing a first video signal U1 and a second video signal U2 having different formats and bands. FIG. FIG. 2 shows a first recording video signal V1 (FIG. 2) generated by converting the first video signal U1 (FIG. 2A) by recording signal processing according to the embodiment of FIG.
3 (b)) is a diagram showing the signal format. Similarly, FIG. 3 shows a second video signal U2 (FIG. 3 (a)) generated by converting the second video signal U2 (FIG. 3 (a)) by recording signal processing according to the embodiment of FIG. 2 recorded video signal V2
It is a figure which shows the signal format of (FIG.3 (b)). 4 and 5
FIG. 4 is a diagram showing a track pattern formed by recording the first recording video signal V1 and the second recording video signal V2 on a magnetic tape.

Here, in order to make the explanation easy to understand,
The operation will be described using specific numerical values. As a specific example of the first video signal U1, baseband high-definition video signals conforming to the studio standard described in the document "Technical conditions for high-definition television broadcasting" of the Telecommunications Technology Council are connected to terminals 12 and 13. , 14. The first video signal U1 has a scanning line number L = 1125 lines per frame, a field frequency fv = 60 Hz, and a frame frequency 30H.
z signals, which are input to terminals 12, 13, and 14 as three primary color signals of R, G, and B having a bandwidth of 20 MHz, respectively. The three primary color signals are converted by a matrix circuit 30 into a luminance signal Y having a band of 20 MHz and two color difference signals PB and PR having a band of 5 MHz.
0 is supplied. Hereinafter, the video signal output from the matrix circuit 30 is referred to as an HD signal. FIG. 2A schematically illustrates the format of the HD signal. As shown in this figure,
The HD signal is a signal format in which three signals Y, PB, and PR are given simultaneously and each has horizontal blanking.

Next, as a specific example of the second video signal U 2, a MUSE band compressed video signal (hereinafter referred to as a MUSE signal) described in the same document of the Telecommunications Technology Council is input to the terminal 11. Is done. FIG. 3A schematically shows the format of the MUSE signal. As shown in FIG.
The USE signal is a signal of a format having no horizontal blanking by time-division multiplexing of the positive polarity synchronization signal HS, the luminance signal Y, and the color difference signals BY and RY in a line-sequential manner. a)
The format is completely different from the HD signal shown in FIG. This MUSE signal has the same number of scanning lines as L = 1125 lines and the field frequency fv =
Although the signal is 60 Hz and the frame frequency is 30 Hz, the occupied band is different and the signal is band-compressed to about 8 MHz which is １ ／ or less of the HD signal. Therefore, here, the case where m = 20/8 設定 2 will be described based on the band ratio between the two (HD signal and MUSE signal).

Also, the number of effective lines differs between
The video effective line of the signal is a line number in the frame, and a total of 10 # 41 to # 557 and # 603 to # 1120.
In contrast to the 35 lines, the video effective lines of the MUSE signal are a total of 1032 lines, which are smaller than the HD signal. When such additional information is included, all of the 1125 lines must be transmitted (recorded / reproduced), and the number of lines required for information transmission is larger for the MUSE signal than for the HD signal.

According to the present invention, two video signals having different signal formats and different numbers of lines and bands required for transmission can be efficiently and faithfully recorded and reproduced.

In the embodiment of FIG. 1, when the HD signal as the first video signal is recorded, it is set so that all of the video effective lines (1035 lines) necessary for the transmission can be recorded at a minimum. Also, the MU, which is the second video signal,
When recording the SE signal, 1125 necessary for the transmission is used.
Set so that all of the lines can be recorded.

Specifically, when the HD signal is recorded, as shown in the track pattern of FIG.
＃# 560 and # 603〜 # 1122 for a total of 1040 lines. Hereinafter, it is assumed that the number of recording lines of the first video signal is n1 = 1040. When the MUSE signal is recorded, as shown in the track pattern of FIG.
It is set to record all 25 lines. Hereinafter, it is assumed that the number of recording lines of the second video signal is n2 = 1125. By setting the number of recording lines as described above, it is possible to faithfully reproduce and restore necessary and sufficient video information regardless of the format of the first video signal or the second video signal.

In the present invention, as a method of recording the first and second wideband video signals, one field period is divided into M (M is an integer of 1 or more) channels, and each channel is divided into M channels. It is divided into N (N is an integer of 1 or more) segments, and M × N (1
When recording is performed by the M-channel N-segment division recording method in which recording is performed by dividing into M × N × 2 tracks per frame, a signal of a redundant line (specifically, between the divided video signals, A blanking signal X, a synchronization signal V, a reference signal R, and a redundant signal such as an additional signal S) are provided and recorded. Thus, even if the skew caused by the expansion and contraction of the tape is affected, the video signal to be divided and reproduced is connected in the period of the redundant signal, so that the original continuous signal can be restored without error. It can be faithfully restored.

In this embodiment, the first video signal is recorded by dividing M1 = 1 and N1 = 4 into four segments per channel.
The case where the second video signal is recorded by dividing one channel into two segments with M2 = 1 and N2 = N1 / m = 2 will be described.

Further, in the present invention, the basic period of one line of the first recording video signal V1 generated by sampling the first video signal is set to TH1, and the sampling number S1 per one line is set to the second Assuming that the basic period of one line of the second recording video signal V2 generated by sampling the video signal is TH2, it is equal to or larger than m times the number of samplings S2 per line, and S1 ≧ S2 × m. In addition, the number of the redundant lines is appropriately determined in the case of recording the first video signal and the case of recording the second video signal,
The total number of redundant lines per frame when recording the first video signal is K1 and the total number of redundant lines per frame when recording the second video signal is K2.
When recording a video signal, a recording period T1 per track is converted into a total number L1 of lines, and T1 = L1 × TH1 L1 = (n1 + K1) / (M1 × N1 × 2), and a second video signal Is converted to the total number of lines L2, and the following equation is obtained: T2 = L2.times.TH2 L2 = (n2 + K2) / (M2.times.N2.times.2). Further, both are set so that T1 × M1 × N1 = T2 × M2 × N2 = 1 / fv L2 = L1 × S1 / S2> L / (M1 × N1 × 2 / m).

More specifically, in this embodiment, when the first recording video signal is recorded, S1 = 1700, K1 = 118, L1 = 144.75, and 180 degrees of each track will be described later. Is set so that a signal for 144.75 lines can be recorded during the period.

When the second recording video signal is recorded, the first recording video signal is set during the 180-degree period of each track by setting S2 = S1 / m = 850, K2 = 33, and L2 = 289.5. It is set so that a signal for 289.5 lines, which is exactly m (= 2) times that of a signal, can be recorded.

By setting the total number of lines L1 and L2 recordable per track as described above, in any of the first and second video signals, the area where the video signal is recorded on the tape (FIG. 4 (b) ) And C on the track in FIG.
And the audio information input in association with each of the first and second video signals is also substantially the same on the tape (FIG. 4 (b) and FIG. 5 (b)). (The area indicated by B on the track No. 2). Further, the number of samples per line S1, S2
With this setting, the clock used for the signal processing of the recording system and the signal processing of the reproduction system can be used in common, and the effect that most of the signal processing system can be shared between them can be obtained.

The operation of FIG. 1 will be described in detail with reference to FIGS. 2, 3, 4 and 5 for the above numerical examples. FIG.
Numerals 1a and 1b denote rotating magnetic heads having different azimuth angles, which are mounted on the drum 3 at an angle of 180 degrees and rotated together with the drum 3 under the control of the servo control circuit 300. Reference numeral 6 denotes a magnetic tape which is driven by the capstan 5 under the control of the servo control circuit 300. The magnetic tape 6
It is wound more than 80 degrees, specifically, for example, about 5 degrees on the entrance side of the drum and about 5 degrees on the exit side of the drum. As a result, FIG. 5
As shown in (b), a so-called overlap area shown in the areas A and D of each track is formed.

Numeral 10 is a mode designating circuit for outputting a recording mode designating signal. And a second recording mode designating signal for designating a mode for recording the second video signal. The recording mode designation signal from the mode designation circuit 10 is transmitted to the video signal recording processing circuit 100, the servo control circuit 30
0 and FM modulation circuit 40, respectively.

In the video signal recording processing circuit 100, when the first recording mode designating signal is supplied in response to the recording mode designating signal from the mode designating circuit 10,
An HD signal composed of three signals of Y, PB, and PR from the matrix circuit 30 is supplied as the first video signal, and signal processing and conversion are performed as appropriate. In this case, a first recording video signal V1 of one channel is generated. You. FIGS. 2A and 2B schematically show the signal formats of the input first video signal HD and the output first recorded video signal V1. Similarly, when the second recording mode designation signal is supplied,
A MUSE signal from the terminal 11 is supplied as the second video signal, and is subjected to signal processing and conversion as appropriate to generate a second recording video signal V2. This input second video signal M
FIGS. 3A and 3B schematically show the signal format of the second recording video signal V2 output as USE.

The first or second recording video signal V generated and output by the video signal recording processing circuit 100
1 and V2 are FM-modulated by an FM modulation circuit 40, and then, via a recording amplification circuit 50, the magnetic heads 1a and 1b.
Thus, the data is sequentially recorded on the parallel oblique tracks of the magnetic tape 6 in one channel.

In the servo control circuit 300, when the first recording mode designating signal is supplied in response to the recording mode designating signal from the mode designating circuit 10, the rotational speeds of the rotary magnetic heads 1a and 1b are increased every second. 120 rotations, and the running speed of the magnetic tape 6 is a predetermined speed V
The travel is controlled so as to reach t. Here, as shown in FIG. 4 (a), the first recording video signal V1 is aligned with each other on a line-by-line basis when viewed in a direction perpendicular to parallel oblique tracks formed by recording the magnetic tape 6 on the magnetic tape 6. The value of each parameter is, for example, the tape width of the magnetic tape 6 is 1
/ 2 inch, the track pitch is set to 17.5 μm, the track inclination angle is set to 5.95 degrees, and the tape speed is set to Vt = 40.52 mm / sec. When the second recording mode designation signal is supplied, the rotational speed of the rotary magnetic heads 1a and 1b is controlled at 60 revolutions per second, which is 1/2 of that in the first recording mode. The traveling speed of the traveling speed No. 6 is also controlled so as to be half the speed in the first recording mode, that is, Vt / 2 = 20.26 mm / sec.

As described above, the relative speed of the tape and the head in the second recording mode is set to exactly 1/2 of the relative speed in the first recording mode. In the first recording mode, M1 = 1 and N1 = 4 are set, and one channel period is divided into M1 × N1 = 4 (one frame period is eight) tracks for recording. While the 4-segment recording is performed, in the second recording mode, M2 = 1,
N2 = 2 is set and the period of one field is set to M2 × N2.
1-channel 2-segment recording is performed in which the data is divided into two tracks (one frame period is four tracks) and recorded.
In addition, with the above setting, even in the second recording mode, the first
The same track pitch (17.5μ) as in the recording mode
m) and the track inclination angle (5.95 degrees) are obtained, and the recording time can be twice as long as that in the first recording mode by making the track pattern apparently the same.

Next, signal processing during recording in the video signal recording processing circuit 100 will be described with reference to the detailed embodiment of FIG. Here also, the description will be made using specific numerical values for easy understanding.

In FIG. 6, of the first video signal HD, the luminance signal Y is supplied to the terminal 1 of the switch 151 via the terminal 112, and the color difference signals PB and PR are supplied via the terminals 113 and 114, respectively. , AD converters 121 and 12
2 respectively. Also, the second video signal MU
SE is supplied to the terminal 2 side of the switch 151 via the terminal 111. The output of the switch 151 is supplied to the AD converter 120. Reference numeral 140 denotes a clock generation circuit that generates a write clock WH and a read clock RH for a memory used in the time axis conversion circuit 130. Here, the frequency of the write clock WH (that is, the first video signal HD)
FWH = 48.60 MHz The frequency of the read clock RH (that is, the frequency at which the first recording video signal V1 is sampled) is set to fRH = fWH × 3281/2700 = 59.058 MHz, respectively. Is done. Although not shown, the write clock WH is generated in synchronization with the synchronization information input together with the first or second video signal or with the synchronization information input in another system. In addition, the read clock R
H is generated from the write clock WH using a PLL circuit or the like so that fRH / fWH = R / W = 3281/2700, where R and W are integers. The write clock WH and the read clock RH are supplied to the terminals 1 of the switches 152 and 153, respectively. 14
Reference numerals 1 and 142 denote frequency dividers for dividing the write clock WH and the read clock RH to 1 / m = 1/2, respectively, and the frequency of the clock WM of each output (that is, the second video signal The frequency of sampling RM and the frequency of the clock RM (that is, the frequency of sampling the second recording video signal V2) are given by fWM = fWH / m = 24.30 MHz fRM = fRH / m = 29.529 MHz, respectively. . Output clocks WM and RM from the frequency dividers 141 and 142 are supplied to switches 152 and 15 respectively.
3 is supplied to the terminal 2 side.

The switches 151, 152 and 153 respond to the recording mode designation signal from the terminal 115 and
When the recording mode is specified, the terminal 1
When the second recording mode is designated, each of them is switched to the terminal 2 side.

First, in the first recording mode, the switch 1
51, a luminance signal Y of the first video signal HD is output.
In the D converter 120, the digital signal is sequentially sampled and converted into a digital signal by the clock WH having a frequency fWH = 48.60 MHz supplied from the switch 152, and is supplied to the time axis conversion circuit 130. The number SH of samples per line obtained by sampling the luminance signal Y at the clock WH is given by SH = fWH / (L × fV / 2) = 1440 as shown in FIG. Only the luminance information of the remaining 1,260 samples of effective pixels excluding the horizontal blanking of 180 samples is sequentially written to the memory of the time base conversion circuit 130 in line units.

The color difference signals PB and PR from the terminals 113 and 114 are respectively converted by the AD converters 121 and 122 from the clock WH from the switch 152 into the frequency divider 143.
FWH / 4 divided by 1/4 to 12.15 MHz
And sequentially converted into a digital signal by the clock WC. The two color difference signals PB and PR output from the A / D converters 121 and 122 are converted into line-sequential signals by a line-sequential processing circuit 123 and supplied to a time-base conversion circuit 130 as line-sequential color difference signals. The number of samples per line obtained by sampling the line-sequentialized color difference signals PB and PR with the clock WC is as follows:
1440/4 = 360, of which the color information of the remaining 315 samples of effective pixels, excluding the horizontal blanking of 180/4 = 45 samples, is converted to the time axis conversion circuit 13
0 is sequentially written to the memory of line 0 in line units.

The above-described line-by-line writing to the memory of the time axis conversion circuit 130 is performed as follows. That is,
The address is controlled by the address control circuit 131 based on the write clock WC from the frequency divider 143, and the number of effective pixels per line from the line sequential processing circuit 123 is 3
15 sample line sequential color difference signal (PB or PR)
Then, a YC blanking signal of a predetermined level (corresponding to, for example, the zero level of the line-sequential color difference signal) for eight samples is written into a predetermined position of the memory, and subsequently, a write from the switch 152 is performed. The address is controlled by the address control circuit 131 based on the input clock WH, and the luminance signal (Y) of 1260 samples of effective pixels per line from the AD converter 120 is written in the memory. Therefore, the memory shown in FIG.
(b) As shown in FIG.
5 samples, 8 samples of the YC blanking signal, and 1260 samples of the luminance signal are time-division multiplexed and written in a time-division multiplexed signal of a total of 1583 samples on a line-by-line basis.

After the writing of the time-base conversion circuit 130 into the memory is completed, the line-by-line reading from the memory is performed as follows. That is, the address is controlled by the address control circuit 131 based on a read clock RH having a frequency f RH = 59.058 MHz supplied from the switch 153, and the line-sequential color difference signal 315 samples and the YC blanking are read from the memory in line units. The signal is read in the order of 8 samples of the signal and 1260 samples of the luminance signal, and is read sequentially with a temporary reading pause so that a horizontal blanking period of 117 samples is generated between the lines. This read output is supplied to the synchronization insertion circuit 132, and the negative polarity synchronization information from the synchronization generation circuit 133 is inserted into the horizontal blanking period of 117 samples. The synchronization generation circuit 133 receives the first recording mode designation signal from the terminal 115 based on the clock RH from the switch 153, and
As shown in the figure, the front porch signal for 4 samples and
A negative sync signal for 40 samples, a back porch signal for 4 samples, and a burst signal for 40 samples (specifically, a burst signal B1 having a frequency fRH / 8 = 7.38225 MHz and a repetition period of 5 cycles). And a blanking signal for 29 samples of a predetermined level (e.g., corresponding to the zero level of the line-sequential color difference signal) to generate a total of 117 samples of the negative electrode synchronization information HS1.
The negative synchronization information HS1 is supplied to the synchronization insertion circuit 132 by the synchronization insertion circuit 132.
The output from the time base conversion circuit 130 is inserted in the horizontal blanking period of 117 samples, and the output is converted to an analog signal by the DA converter 134 and output to the terminal 116 as the first recording video signal V1. As shown in FIG. 2B, the first recording video signal V1 is composed of the above-mentioned negative electrode synchronization information (117 samples), a line-sequential color difference signal (315 samples), a YC blanking signal (8 samples), and a luminance in line units. The signal (1260 samples) is time-division multiplexed, and the total number of samples S1 per line is given by S1 = 1700, and the basic period TH1 per line
Is a signal of the form given by TH1 = S1 / fRH = 28.79 μs.

Thus, in the first recording mode, the total number L1 of lines that can be recorded during the 180-degree period T1 of each track.
Is given by L1 = T1 / TH1 = fRH / (N1 * fv * S1) = 144.75.

In the first recording mode, in the time axis conversion circuit 130, the address control circuit 131 controls the reading order and the number of readings in line units.
The data is sequentially read in the order of the line numbers shown in FIG. That is, # 1 to # per frame of the first video signal HD
Of the signals of the 1125 line, the period of the odd-number segment (1SEG, 3SEG,
5SEG and 7SEG) include the signal of the odd-numbered line (including the color difference signal PR and the luminance signal Y of FIG. 2B (2n−
1) The signal of the first line) is read. Specifically, in the first segment period (1SEG), a total of 130 lines are read in the order of every four lines of line numbers # 41, # 45,..., # 557, and the third segment period (3SEG) ), # 43, # 47, ..., # 55
Similarly, a total of 130 lines are read in the order of 4 lines of 9,
Further, in the period of the fifth segment (5SEG), # 60
3, # 607,..., # 1119 in 4 line order, total 1
In the period of the seventh segment (7SEG) of 30 lines, a total of 130 lines are read in the order of four lines # 605, # 609,..., # 1121.

Similarly, the period (2SEG, 4SEG, 6SE) of the even segment recorded by the magnetic head 1b is used.
G, 8SEG), the signal of the even-numbered line (FIG. 2)
The signal of the (2n) th line including the color difference signal PB and the luminance signal Y shown in (b) is read. Specifically, in the period of the second segment (2SEG), the line numbers # 42 and # 4
A total of 130 lines are read in the order of four lines of 6,..., # 558, and during the fourth segment period (4SEG),
# 44, # 48,..., # 560
30 lines are read, and in the period of the sixth segment (6SEG), # 604, # 608,.
In the 8th segment period (8SEG), a total of 130 lines in the order of 4 lines of 120 are # 606, # 610,.
A total of 130 lines are read in the order of 4 lines #, # 1122.

Further, when reading is performed in units of each of the above segments, as shown in FIG. 4A, a blanking signal X for 1.75 lines having a predetermined level and a synchronization signal including synchronization information related to the segment are output. A redundant signal of the segment synchronizing signal V for the line is generated and output before and after each segment. This redundant signal is output from the synchronization generation circuit 1
33, and is inserted by the synchronous insertion circuit 132 before and after each segment unit signal output from the time axis conversion circuit 130.

From the above, the number n1 of effective lines per frame in which the first video signal is recorded is given by n1 = 130 × 8 = 1040. In each track, a signal of 132.75 lines including the redundant signal of 2.75 lines is recorded in an area of about 165 degrees shown in C of FIG. 4B. .

On the other hand, since the area that can be recorded on each track is 180 degrees except for the overlap period (A and D in FIG. 4B), the remaining area of about 15 degrees (FIG. 4B )
(The area indicated by B in FIG. 12, which is an area corresponding to 12 lines in terms of the number of lines) can be secured as an area for recording information other than the video signal. In the present invention, as information other than the video signal in this area, for example, a PC obtained by compressing a time axis of an audio signal input accompanying the first video signal is used.
It is recorded in the M code format.

In the first recording mode, the total number K1 of redundant lines per frame is given by K1 = L1 × M1 × N1 × 2-n1 = 118.

Next, in the second recording mode, the second video signal MUSE is output from the switch 151 and the AD converter 120 outputs the frequency f supplied from the switch 152.
The signals are sequentially sampled by a clock WM of WM = 24.30 MHz, converted into digital signals, and supplied to the time axis conversion circuit 130. The number of samples SM per line obtained by sampling this MUSE signal with the clock WM is given by SM = fWM / (L × fV / 2) = 720 as shown in FIG. Then, all the 720 samples are sequentially written to the memory of the time axis conversion circuit 130. In the second recording mode, the line sequential processing circuit 12
3 is not supplied to the time axis conversion circuit 130, or the supplied signal is ignored and the writing to the memory is not performed.

After the writing to the memory is completed, the switch 15
The address is controlled by the address control circuit 131 based on a read clock RM having a frequency fRM = 29.529 MHz supplied from the memory 3 and read from the memory every 720 samples in line units, and 130 samples between the lines. Scanning is sequentially performed by providing a temporary reading pause so that a horizontal blanking period is generated. This read output is supplied to the synchronization insertion circuit 132, and the negative polarity synchronization information from the synchronization generation circuit 133 is supplied to the synchronization insertion circuit 132.
It is inserted in the horizontal blanking period of 0 samples. In the synchronization generation circuit 133, the second recording mode designation signal is supplied from the terminal 115 based on the clock RM from the switch 153, and as shown in FIG. A negative sync signal for samples, a back porch signal for 4 samples, and a burst signal for 40 samples (specifically, the frequency fRM / 8 =
It is formed of a burst signal B2 of 3.69125 MHz and a repetition period of 5 cycles, and a blanking signal of a predetermined level (e.g., corresponding to the zero level of the color difference signals RY and BY) for 42 samples. A total of 130 samples of the negative electrode synchronization information HS2 are generated. The negative synchronization information HS2 is inserted by the synchronization insertion circuit 132 during the horizontal blanking period of the 130 samples of the output from the time base conversion circuit 130, and the output is converted into an analog signal by the DA converter 134. The signal is output to the terminal 116 as the second recording video signal V2. This second recording video signal V2
As shown in FIG. 3B, the negative synchronization information (130 samples) and the MUSE signal (720 samples) are time-division multiplexed on a line-by-line basis, and the total number S2 of samples per line is S2 = 850 = S1 / m and the fundamental period TH2 per line
Is a signal of the form given by TH2 = S2 / fRM = 28.79 μs = TH1.

Thus, in the second recording mode, the total number L2 of lines that can be recorded during the 180-degree period T2 of each track.
Is given by: L2 = T2 / TH2 = fRM / (N2 * fv * S2) = 289.5 = L1 * m

Further, the second recording video signal V2 is composed of the negative synchronizing information (HS2) and the line-sequential color difference signals (BY, R-
Y) and the luminance signal (Y) are time-division multiplexed signals, and a signal very similar to the first recording video signal V1 is obtained.

In the second recording mode, similarly to the first recording mode, in the time axis conversion circuit 130, the reading order and the number of readings are controlled in units of lines by the address control circuit 131. 5 (a) are sequentially read in the order of the line numbers. That is, of the signals of the # 1 to # 1125 lines per frame of the second video signal MUSE, in the period of the odd-number segment (1SEG, 3SEG) recorded by the magnetic head 1a, the signal of the odd-numbered line (FIG. The signal of the (2n-1) th line including the color difference signal RY and the luminance signal Y shown in (b) is read.
Specifically, during the period of the first segment (1 SEG),
A total of 282 lines are read in the order of every two lines of line numbers # 1, # 3,..., # 563, and during the third segment period (3SEG), # 565, # 567,.
・ A total of 281 lines are read in the order of every other line of # 1125.

Similarly, during the even-segment period (2SEG, 4SEG) recorded by the magnetic head 1b,
The signal of the even-numbered line (the signal of the (2n) -th line including the color difference signal BY and the luminance signal Y in FIG. 3B) is read. Specifically, the period of the second segment (2SE
In G), a total of 282 lines are read in the order of two lines of line numbers # 2, # 4,..., # 564.
.. A total of 280 lines are read in the order of two lines of # 1124.

Further, when reading in each segment unit as described above, similarly to the case of the first recording mode, FIG.
As shown in (a), in addition to a blanking signal X for three lines having a predetermined level and a segment synchronization signal V for one line including synchronization information related to a segment, additional information such as an identification signal is included. A total of 7.5 (or 8.5) including the additional signal S for 3.5 lines and the reference signal R for one line
2.) Redundant signals for lines are generated before and after each segment and output. This redundant signal is output from the synchronization generation circuit 1
The point generated at 33 and inserted by the synchronous insertion circuit 132 before and after the signal of each segment output from the time axis conversion circuit 130 is exactly the same as in the first recording mode.

From the above, the number n2 of effective lines per frame in which the second video signal is recorded is given by n2 = 1125, and all the lines of the second video signal are recorded.

As described in the above document of the Telecommunications Technology Council, the line numbers # 43 to # 43 of the second video signal MUSE are used.
# 564 and # 605 to # 1125 include signals related to video information. In each track, a signal related to the video information together with the above-mentioned redundant signal is shown in FIG.
4C is recorded in an area of about 165 degrees (substantially the same area as C in FIG. 4B in the case of the first recording mode).

Line numbers # 3 to # 42 other than those described above,
And # 565 to # 604 include signals related to audio information, and these are signals in the remaining approximately 15 degree region (B in FIG. 5B).
Are recorded in the area shown in FIG. 4 (substantially the same area as B in FIG. 4B in the case of the first recording mode).

As described above, according to the present invention, in the first recording mode and the second recording mode, the video information and the audio information can be recorded in correspondence with the substantially same area of each track. By obtaining the similarity of the patterns, it is possible to obtain an effect that the recording positions of the video information and the audio information are easily identified.

By setting the above parameters,
As is clear from comparison between FIG. 4 (a) and FIG. 5 (a), the shift amount αH (so-called H arrangement) of the inter-segment track at the end of each track corresponds to the period of one line of the recording video signal on the track. 1H, αH = 0.25 in the first recording mode
H, αH = 0.5H in the second recording mode, but the value obtained by converting this H arrangement into the track length is the same in both modes, and in any case, when viewed perpendicular to the track longitudinal direction. The adjacent tracks can be aligned on a line-by-line basis, and in this regard, the similarity of the track patterns can be obtained.

As described above, according to the present invention, two video signals (HD signal and MUSE signal) having completely different bands and signal formats are used for the video signal recording processing circuit 10.
Most of the clock generation circuit 140, the AD converter 120, the time axis conversion circuit 130, the address control circuit 131, the synchronization generation circuit 133, the synchronization insertion circuit 132, the D / A converter 134, etc., are common and the basic cycle is the same. (TH1 = TH2)
And a time-division multiplexed signal (a first recorded video signal V1 and a second recorded video signal V2) whose signal formats are very similar can be obtained relatively easily, and an almost uniform image quality corresponding to the difference in band between the two. It is possible to provide a recording / reproducing device with high performance.

Next, an embodiment of the FM modulation circuit 40 is shown in FIG. In the figure, the video signal recording processing circuit 1
The first recording video signal V1 or the second recording video signal V2 from 00 is supplied to a pre-emphasis circuit 43 via a terminal 41 and is appropriately emphasis-processed.
The signal is supplied to the M modulator 44 and FM-modulated at an allocation of a predetermined frequency. The FM output from the FM modulator 44 is supplied to the terminal 1 side of the switch 46 and is also frequency-divided by the frequency divider 45 to 1 / m (= １ ／). Supplied. The switch 46 is switched to the terminal 1 when the first recording mode is designated in response to the recording mode designation signal supplied from the mode designating circuit 10 via the terminal 42, and the second recording mode When the mode is designated, the mode is switched to the terminal 2 side. Therefore, in the first recording mode, the FM modulator 4 based on the first recording video signal V1 input from the terminal 41.
The output modulated at 4 is switched by the switch 46 and output to the terminal 47. In the second recording mode, the second recording video signal V input from the terminal 41 is output.
2, the output is frequency-modulated by an FM modulator 44, and further divided by a frequency divider 45 to １ ／. The output is switched by a switch 46 and output to a terminal 47. The parameters relating to the emphasis characteristics of the pre-emphasis circuit 43 may be appropriately switched between the first and second recording modes according to the recording mode designation signal from the terminal 42.

On the other hand, as described above, the servo control circuit 3
At 00, the relative speed of the tape and the head in the second recording mode is controlled to be exactly 1 / m (= １ ／) of the relative speed in the first recording mode.

The frequency of the FM signal output from the FM modulation circuit 40 in the second recording mode is changed by the operation of the frequency divider 45 to the frequency in the first recording mode.
Since the frequency of the signal is set to exactly 1 / m (= １ ／), the output from the FM modulation circuit 40 is
The recording wavelength of the FM signal recorded on the tape 6 by the magnetic heads 1a and 1b through the first recording mode can be made exactly the same in the first recording mode and the second recording mode.

Therefore, almost the same magnetic recording characteristics can be ensured in these two modes, and in both cases, almost uniform image quality performance corresponding to the band can be obtained. Also,
In these two modes, most of the FM modulation circuit 40 and the recording amplification circuit 50 can be made common, and the magnetic heads 1a and 1b can be shared in both modes, so that the circuit system can be reduced in scale. Economic effects can be obtained.

In the above recording mode, a control signal RCTL is output from the servo control circuit 300 and is recorded on a control track on the magnetic tape 6 by the control head 4 via the terminal R of the switch 90. . This control signal RCTL is
The signal has the same frequency in the first and second recording modes, specifically, a signal of 30 Hz which is the same as the frame frequency of the first and second video signals.

Next, the operation at the time of reproduction will be described with reference to FIG. The control signal is used not only for tracking control during reproduction, but also for a signal for determining whether recording was performed in the first recording mode or recording in the second recording mode. That is, the control signal PTL reproduced from the control track on the magnetic tape 6 by the control head 4 is:
Via the terminal P side of the switch 90, the servo control circuit 30
0 is supplied as a tracking control signal,
The recording mode is supplied to the mode identification circuit 20, and the above-described recording mode is identified. At the time of reproduction, the servo control circuit 300 sets the tape speed to Vt and sets the head rotation speed to 120 rotations per second so as to obtain the same tape and head relative speed as in the first recording mode, or In order to obtain the same relative speed of the tape and the head as in the second recording mode, one of the second reproduction modes in which the tape speed is set to Vt / 2 and the head rotation speed is set to 60 rotations per second is set. You. Here, for example, the second reproduction mode is set first.

When the second reproduction mode is set,
The second recording video signal V2 recorded in the second recording mode
Is reproduced, since the tape speed becomes the same for recording and reproduction, the control signal PCTL having the same frequency of 30 Hz from the control track is used from the control track.
Is reproduced, but the first recorded in the first recording mode is
When the recorded video signal V1 is reproduced, the tape speed is different between recording and reproduction, and the tape is reproduced at 1/2 tape speed at the time of recording.
It is reproduced as a 5 Hz signal. Thus, the difference in the frequency of the reproduced control signal PCTL causes
The mode identification circuit 20 identifies whether the signal is recorded in the first or second recording mode. If the first recording video signal V1 has been recorded, a first reproduction mode designating signal for designating the first reproduction mode is output. If the second recording video signal V2 has been recorded, the first reproduction mode designating signal is outputted. A second playback mode designating signal designating the 2 playback mode is output from the mode identification circuit 20. In a mode other than these modes, for example, in a portion where no signal is recorded, the first second reproduction mode is set and the second reproduction mode designating signal is output, or the reproduction set just before that is set. The mode is held and the mode designation signal is output. In the servo control circuit 300, the first or second reproduction mode is set in response to the first or second reproduction mode designation signal from the mode identification circuit 20, respectively.

Similarly, when the first playback mode is first set at the time of playback and the first recorded video signal V1 recorded in the first recording mode is played back, the same tape as when the first playback mode was recorded is used. Since the control signal PCTL having the same frequency of 30 Hz is reproduced at the same time as the recording, the control signal PCTL reproduced at the same speed is used. Therefore, the control signal PCTL having a frequency of 60 Hz is doubled. Therefore, in this case as well, it is possible to identify which of the first and second recording modes has been recorded by the difference in the frequency of the reproduced control signal PCTL.

The first or second recording mode described above is identified, and the first recording mode reproduced from the magnetic heads 1a and 1b.
The reproduced video signal V1 '(FIG. 2 (b)) or the second reproduced video signal V2' (FIG. 3 (b)) is amplified by the reproducing amplifier circuit 60,
After being FM-demodulated by the FM demodulation circuit 70, it is subjected to de-emphasis processing as appropriate, and its output is output to the video signal reproduction processing circuit 20.
At 0, reproduction processing is performed. In the video signal reproduction processing circuit 200, the mode identification circuit 20 sends the first
When the reproduction mode designating signal is supplied, processing reverse to the recording processing for the HD signal by the video signal recording processing circuit 100 is performed, and the luminance signal Y and the color difference signal PB, Original HD signal consisting of PR (Fig. 2
(a)) is restored, and the matrix signal 8 is obtained from the HD signal.
At 0, the original three primary color signals R, G, B are restored and output to the terminals 22, 23, 24 as the first video signal U1, respectively. Further, in the video signal reproduction processing circuit 200, when the second reproduction mode designating signal is supplied from the mode identification circuit 20, the processing reverse to the recording processing for the MUSE signal of the video signal recording processing circuit 100 is performed. Then, the original MUSE signal (FIG. 3A) is restored from the second reproduced video signal V2 'and output to the terminal 21 as the second video signal U2.

Next, the signal processing at the time of reproduction in the video signal reproduction processing circuit 200 will be described with reference to the detailed embodiment of FIG.

In FIG. 8, the first reproduced video signal V 1 ′ or the second reproduced video signal V 2 ′ from the FM demodulation circuit 70 is supplied to an AD converter 234 and a clock generation circuit 240 via a terminal 216. .

First, when the first playback mode is identified by the mode identification circuit 20 and the first playback video signal V 1 ′ is supplied, the clock generation circuit 240
In response to the first reproduction mode designation signal supplied from the mode identification circuit 20 via the terminal 215,
Frequency 7.38225 MH included in playback video signal V1 '
Based on the z burst signal (B1 in FIG. 2 (b)), the frequency is multiplied by 8 to generate a clock RH 'having the same frequency fRH' = 59.058 MHz as the clock RH of the video signal recording processing circuit 100. You. This clock RH '
It is supplied to the address control circuit 231 as a write clock for the memories of the AD converter 234 and the time axis inverse conversion circuit 230.

The clock generation circuit 240 generates a clock WH 'having the same frequency fWH' = 48.60 MHz as the clock WH of the video signal recording processing circuit 100. The signal is supplied to the address control circuit 231 via the terminal 1 as a read clock of the memory of the time axis inverse conversion circuit 230.

The first reproduced video signal V 1 ′ is sequentially sampled by the AD converter 234 and converted into a digital signal by the clock RH ′ from the clock generation circuit 240, and is stored in the memory of the time axis reverse conversion circuit 230 in line units. Are sequentially written. The writing to the memory in line units is performed by the address control circuit 23 based on the clock RH '.
2 of the first reproduced video signal V1 ', only the luminance signal Y and the line-sequential color difference signals PB and PR shown in FIG. 2B are written into the memory, and the other synchronization information HS
1, the blanking signal X, the segment synchronization signal V, etc. are removed without being written to the memory.

After the above-described writing into the memory of the time axis inverse conversion circuit 230 is completed, based on the clock WH 'output from the clock generation circuit 240, the luminance is output from the memory in line units in a predetermined time series order. The signal Y and the line-sequential color difference signals PB and PR are sequentially read. The read luminance signal Y is converted by the DA converter 220 into the switch 25.
3 is converted to an analog signal based on the clock WH ′ from
2 is output. The read line-sequential color difference signals PB and PR are converted into simultaneous-type color difference signals PB and PR by a line-sequential processing circuit 223, and then output from the switch 253 by DA converters 221 and 222, respectively. The clock WH ′ is converted into an analog signal based on the clock WC ′ obtained by dividing the clock WH ′ by に て by the frequency divider 243, and
3 and 214 respectively. The above terminal 212,
The luminance signal Y and the color difference signals PB and PR output to the first and second video signals 213 and 214 respectively correspond to the first video signal HD (FIG. 2A).
The number of valid lines is # 41 to # 560 and # 603 to # 1122 per frame, for a total of 1040 lines.

Similarly, the second reproduction mode is identified by the mode identification circuit 20, and the second reproduced video signal V2 '
Is supplied to the clock generation circuit 240, the frequency 3.6 included in the second reproduced video signal V2 'is supplied.
A burst signal of 91125 MHz (B2 in FIG. 3B)
Is multiplied by 8 to generate a clock RM 'having the same frequency fRM' = 29.529 MHz = fRH '/ m as the clock RM of the video signal recording processing circuit 100. This clock RM '
Is supplied to the address control circuit 231 as a write clock for the memories of the AD converter 234 and the time axis inverse conversion circuit 230.

In the second reproduction mode, the clock WH 'output from the clock generation circuit 240 is output.
Is divided by a frequency divider 242 to 1 / m (= １ ／), and a clock WM ′ of frequency fWM ′ = fWH ′ / m = 24.30 MHz is switched by a switch 253, and the above DA It is supplied to the address control circuit 231 as a clock for reading the memory of the converter 220 and the time axis inverse conversion circuit 230.

The second reproduced video signal V 2 ′ is sequentially sampled by the AD converter 234 and converted into a digital signal by the clock RM ′ from the clock generating circuit 240, and is stored in the memory of the time axis reverse conversion circuit 230 in line units. Are sequentially written. The writing to the memory in line units is performed by the address control circuit 23 based on the clock RM '.
3 of the second reproduced video signal V2 ', the positive synchronizing signal HS, the color difference signals BY and R- shown in FIG.
Only Y and the luminance signal Y are written to the memory, and the other synchronization information HS2, blanking signal X, segment synchronization signal V, additional signal S, reference signal R, etc. are removed without being written to the memory.

After the writing to the memory of the time axis inverse conversion circuit 230 is completed, based on the clock WM 'output from the switch 253, the data is sequentially read from the memory in line units in a predetermined time series order. , DA converter 220
Is converted into an analog signal based on the clock WM 'from the switch 253, and then switched by the switch 251 and output to the terminal 211 via the terminal 2 side.
The signal output to the terminal 211 is a signal of the same format as that of the second video signal MUSE (FIG. 3A), and the number of effective lines is # 1 to # 564, # 56 per frame.
5 to # 1125 total 1125 lines.
All the lines including the audio information of the E signal are restored.

According to the present invention, by setting the recording parameters described above, the basic period TH1 of one line of the first reproduced video signal V1 'shown in FIG. 2B and the second reproduced video signal V1' shown in FIG. The basic period TH2 of one line of the video signal V2 'can be made equal to each other, and the number of samples of each line is one.
Given exactly in a 2: 1 relationship between 700 and 850. On the other hand, as described above, the relationship between the frequency of the clock RH 'and the frequency of the clock RM' in the video signal reproduction processing circuit 200 is also set to fRH ': fRM' = 2: 1. Therefore, in both the first and second reproduction modes, the processing of the time axis inverse conversion in the line unit in the time axis inverse conversion circuit 230 can be made common, and as shown in FIG. Reproduction processing circuit 2
Most of 00 can be common. In addition, since the magnetic heads 1a and 1b and the reproducing system such as the reproducing amplifier circuit 60 and the FM demodulating circuit 70 can be commonly used in both modes, the circuit system can be reduced in scale in the reproducing system as well as the recording system. A great economic effect can be obtained.

As described above, in the first recording mode and the second recording mode, a track pattern having the same track pitch and track inclination angle is obtained to achieve long-term recording, and the effect between adjacent tracks is obtained. Since the alignment can be performed in line units, it is possible to obtain an effect of reducing crosstalk interference from an adjacent track and facilitating variable speed reproduction. As shown in FIGS. 4 (b) and 5 (b), the area (C) for recording video signals and the area (B) for recording audio signals in both modes on the track can be made substantially the same. Therefore, a new area shown in A or D of FIG. 4B and FIG. 5B can be secured in common, and another information signal different from the video signal and the audio signal is provided in these common areas. A common function of both modes, such as recording an additional information signal accompanying a video signal or an audio signal, or a control information signal for tracking, etc., is a function for recording various additional information while increasing the tape use efficiency. It can be easily realized.

Further, as described in the above-mentioned telecommunications technology council material, # 47 to # 47 of the second video signal MUSE are used.
562 (and # 609 to # 1124) video effective line signals are # 42 to # 557 of the first video signal HD.
(And # 604 to # 1119) is decoded as a signal of the line, or conversely,
The signals of video effective lines of # 42 to # 557 (and # 604 to # 1119) are # 4 of the second video signal MUSE.
7 to # 562 (and # 609 to # 1124) are encoded as signals, but according to the present invention, as described above, all of the signals of these lines are reliably recorded in both modes. Therefore, even if recording is performed in either the first video signal HD or the second video signal MUSE, or dubbing recording is repeated between the devices using either the first or second video signal, high-definition information is obtained. All of the above-described effective video information necessary for the transmission of the video data can always be completely recorded and reproduced without any loss, so that it is possible to provide a faithful and accurate recording and reproducing apparatus for high-definition image information.

As is clear from the recording methods shown in FIGS. 2 and 3,
Common to the recording modes of FIG.
Of the two magnetic heads 1a and 1b, one of the two line-sequential color signals (the color difference signal P of the first recording video signal V1).
R, or the color difference signal RY of the second recording video signal V2)
Is recorded only by the magnetic head 1a, while the other signal (the color difference signal PB of the first recording video signal V1 or the color difference signal BY of the second recording video signal V2) has a different azimuth angle. Recording is performed only by the other magnetic head 1b. As described above, two pieces of color information are separately recorded on the magnetic heads having different azimuth angles from each other, and are recorded.
In the reproduction, two color information is automatically identified and separated according to the difference in azimuth angle between the two, and the color information is reproduced. Therefore, it is necessary to provide a special means for identifying line-sequential color signals in the process of recording or reproduction. , Color discrimination becomes easy, and in particular, an effect that variable speed reproduction can be easily realized is obtained.

In the embodiment of FIG. 1, the value of the parameter M relating to the number of recording channels is set to 1 (M1 = M2 =
As 1), using two magnetic heads (1a, 1b), 1
Although the case where the present invention is applied to channel recording has been described, the present invention is not limited to this. The number of channels and the number of segments are arbitrary, and do not depart from the gist of the present invention.

As an example, when the drum 3 is provided with another system, that is, magnetic heads 2a and 2b shown by broken lines in FIG. In order to make the azimuth angle different between adjacent tracks, the azimuth angles of the adjacent magnetic heads 1a and 2a and the azimuth angles of 1b and 2b are made different.
The azimuth angles of the magnetic heads 1a and 1b and the azimuth angles of 2a and 2b are the same. In the first recording mode, the number of revolutions of the drum 3 is set to 60 revolutions per second, the first video signal HD is set to M1 = 2, N1 = 2, and one field is set in the two-channel two-segment recording method. M1 × N1 = 4 tracks, and the recording is performed. In the second recording mode, the rotation speed of the drum 3 is set to 30 rotations per second, and the second video signal MUSE is set.
With M2 = 2 and N2 = N1 / m = 1, two channels 1
With segment division recording method, M2x per field
N2 = divided into two tracks and recorded. At this time, the tape speed in the second recording mode is set to の of the tape speed in the first recording mode.

The track patterns in the first and second recording modes obtained by the above parameter setting are shown in FIGS. 9 and 10, respectively. In the case of the above-described two-channel recording method, although not shown, in the video signal recording processing circuit 100, the recording video signal processed in each of the first and second recording modes is divided into two-channel signals and output. . Specifically, the signals of the odd-numbered segments shown in FIGS. 4 and 5 (1 SEG, 3 SEG, 5 SEG in FIG.
The signals of SEG, 7SEG, and 1SEG in FIG.
The 3SEG signal is used as the first channel signal (1CH signal shown in FIGS. 9A and 10A) and the even-numbered segment signal (2SEG, 4SE in FIG. 4A).
G, 6SEG, 8SEG signals, and 2S in FIG.
EG and 4SEG signals are signals of the second channel (FIG. 9).
(a) and 2CH signals shown in FIG. 10 (a)). Further, the FM modulation circuit 40 and the recording amplification circuit 50
Is provided for each channel, and the divided and output recording video signal is subjected to FM modulation and recording amplification for each channel, and then the video signal of the first channel is converted by the magnetic heads 1a and 1b. The video signal of the second channel is recorded by the magnetic heads 2a and 2b, respectively. At this time, based on the above setting of the rotation speed of the drum 30, the video signal of each channel is divided into four segments per frame (1 in FIG. 9A) in the first recording mode.
SEG, 2SEG, 3SEG, and 4SEG) are recorded, and in the second recording mode, each frame is divided into two segments (1SEG, 2SEG in FIG. 10A) and recorded. The track pattern shown in FIG. 10 is obtained.

In this embodiment, the track shift amount (H arrangement) between the segments at the track end is shown in FIG. 9A and FIG.
As shown in FIG. 0 (a), αH = 0.5H in the first recording mode.
.Alpha.H = 1.0H in the second recording mode, which is exactly twice the shift amount in the previous embodiment (FIGS. 4 and 5).
Other parameters such as the number of effective recording lines per frame, the number of tracks per frame, the number of recording lines per track, the track pitch, and the track inclination angle are all set to the same value. Therefore, in each mode, the recording area on the track of the video signal and the audio signal input accompanying the video signal is the same as that of the previous embodiment (FIGS. 4B and 5B).
The audio signal is recorded in the area B of about 15 degrees at the beginning of the 180 degrees of each track shown in FIGS. 9B and 10B, and the remaining about 165 degrees is recorded. A video signal is recorded in the area C.

As described above, according to the present invention, it is easy to obtain the similarity of the recording patterns even when the number of channels to be recorded and the number of segments are changed.

Similarly, in the present invention, the first video signal is recorded in the pattern shown in FIG.
In the case of recording with the pattern of 0 (a), or in the case of recording the first video signal with the pattern of FIG. 9 (a) and recording the second video signal with the pattern of FIG. 5 (a) And the same effect can be obtained.

As described above, the present invention generally relates to the first recording video signal (V1) generated from the first video signal (U1).
1) according to the value of the band ratio m between the second recording video signal (V2) generated from the second video signal and the first video signal.
This is applicable to a case where the data is divided into M × N tracks per field and recorded, and the second video signal is divided and recorded with M × N / m tracks per field.

In each of the above embodiments, the case where m is set to 2 has been described. However, the present invention is not limited to this, and m can take any value. As a specific example, for example, a wideband (20 MHz) signal is input as the first video signal (U1) as described above, and a narrowband (8 MHz) as described above is input as the second video signal (U2).
Of the second video signal (U2
), The occupied band of the second recording video signal (V2) becomes, for example, 10 MHz, and the occupation band of the first recording video signal (V1) generated from the first video signal (U1) is also 10 MHz. So that the first video signal (U1
) Is preliminarily band-limited on the input side and then the first recording video signal (V1) is generated, so that the band ratio m between the first recording video signal (V1) and the second recording video signal (V2) is approximately 1 Therefore, m = 1 is set. Therefore, in this case, M1 = M2 (= M) and N1 = N2 (= N) are set,
Both the first video signal (U1) and the second video signal (U2) are divided into M channels and N segments per field and recorded on M × N tracks.

As described above, in the present invention, the above-mentioned parameter m is different from the input first video signal (U1) and the second video signal (U1).
It is not determined by the ratio of the occupied occupied bandwidth of the video signal (U2) but is determined by the ratio of the occupied band of the signal (recording signals V1 and V2) after being converted into a signal suitable for recording. It can be decided.

Here, in the present invention, of the above parameters, the parameter fWH relating to the clock frequency,
fRH, fWM, fRM and parameters S1 and S2 relating to the number of samples per line of the recording video signal are generally
W and R are defined as integers so that the following relational expression is satisfied.

FWM = fWH / m, fRM = fRH / m fWH / fRH = fWM / fRM = W / RS1 = SH × L × (R / W) / (2 × N × L1) ≧ S2 × m , SH is the number of samples per line when the first video signal is sampled by the clock of the frequency fWH as described above, and SH = fWH using the number L of scanning lines per frame and the field frequency fV. / (L × fV / 2).

Next, the value of the above-mentioned parameter m is particularly set to m =
Another embodiment that is set to 1 and satisfies the above relational expression will be described with reference to FIGS. 11 and 12.

FIG. 11 shows that the first and second video signals are set to m = 1, M = 2, N = 1, and both are divided into two channels and one segment per field. When recording on two tracks (four tracks per frame), the signal formats of the first and second recording video signals for each channel generated using the embodiment of FIG. 1 are schematically shown. FIG. FIG.
FIG. 2 is a diagram showing track patterns obtained in the first and second recording modes.

In order to generate the first recording video signal V1 and the second recording video signal V2 shown in FIG. 11, here, as specific numerical examples, fWH = fWM = 32.40 MHz fRH = fRM = 18.27 MHz W / R = 360/203 is set.

First, in the first recording mode, the number of samples per line of the first video signal is calculated as
SH = 960 is set, and among these 960 samples,
Luminance information of the remaining 840 samples of effective pixels excluding the horizontal blanking of 120 samples, and line-sequential color information of 210 samples of 1/4 thereof are generated. In addition to the luminance information and color information for each line, as shown in FIG. 11A, a front porch signal for 4 samples, a negative sync signal for 40 samples, a back porch signal for 4 samples, and 40 samples. Synchronization information for a total of 102 samples, ie, a burst signal for 10 minutes and a blanking signal for 14 samples, and a YC blanking signal for 8 samples between the luminance information and the color information are added.
A time division multiplexed signal of = 1160 samples is generated as the first recording video signal V1.

Therefore, the line basic period TH1 is
TH1 = 63.49 μs, and the total number L1 of lines that can be recorded in the 180 ° period T1 of each track in the first recording mode is given by L1 = fRH / (N × fV × S1) = 262.5. 2 × M × N × L1 = 10 per frame
50 lines can be recorded.

Here, as a specific numerical example of the tape speed at the time of recording the first recording video signal V1, the same as a conventionally known system used in a current home VTR or the like, for example, the VHS system Tape speed Vt = 33.3
Considering the case where 5 mm / sec is set, the track pattern has αH = 1.5H as shown in FIG.
H can be arranged between adjacent tracks,
Video effective line 1 of the first video signal per frame
035 (# 41 to # 557, # 603 to # 1120) can be recorded, and a redundant signal such as a blanking signal X, a segment synchronization signal V, a reference signal R, and an additional signal S can be recorded in one line. 1 per frame
Four lines can be recorded. Note that FIG.
In the embodiment of (a), the track pitch between segments is given by 57.8 μm and the track inclination angle is given by 5.97 degrees by setting the above tape speed.
It is the same as the S method.

Similarly, in the second recording mode, as the number of samples per line of the second video signal, SM = 960
(= SH) is set, and in addition to the total 960 samples in line units, as shown in FIG.
S2 = 1062 (<S1) per line, in which a total of 102 synchronizing information of a negative synchronizing signal for a sample, a back porch signal for 4 samples, a burst signal for 40 samples, and a blanking signal for 14 samples are added. )
The time-division multiplexed signal of the sample is the second recording video signal V2
Is generated as

Therefore, the line basic period TH2 is
TH2 = 58.13 μs (<TH1)
In the recording mode, the total number of lines L2 that can be recorded during the 180-degree period T2 of each track is given by L2 = fRM / (N.times.fV.times.S2) = 286.7, and 2 * M.times.N.times.L2 per frame = 11
46 lines can be recorded.

The tape speed when recording the second recording video signal V2 is set to the same value Vt = 3 as in the first recording mode.
When set to 3.35 mm / sec, the track pattern is set to αH = 1.6H as shown in FIG. All lines # 1 to # 1125 of the video signal can be recorded, and redundant signals such as a blanking signal X, a segment synchronization signal V, a reference signal R, and an additional signal S are recorded for a total of 21 lines per frame. be able to. Also in the embodiment of FIG. 12B, the track pitch and the track inclination angle between the segments are exactly the same as those in the first recording mode by the above setting.

In the embodiment of FIG. 12, the audio signal accompanying the video signal is time-division multiplexed on a predetermined line of the second video signal in the second recording mode. It will be recorded together with the video signal. On the other hand, in the first recording mode, a conventionally known audio recording method, for example, a method of frequency-multiplexing and recording an audio signal to a video signal by FM, or a method of deep recording by PCM is used to perform audio recording. It is easy to record audio signals without occupying a special area for

As described above, particularly when m = 1 is set, the first video signal (U1) and the second video signal (U2)
Can be recorded in a similar format with a similar signal format as shown in the embodiment of FIG. 11 and FIG. The effect can be obtained.

In this case, two signals having different signal formats are recorded in the same format in the same occupied band, and the signal of which format is recorded is identified. An identification signal for providing a part of the magnetic tape, for example, a part of the control track, or a part of a parallel oblique track on which the video signal is recorded, or provided separately from the video track. Recording is performed on a part of the parallel oblique track or on a part of the tape longitudinal direction track provided separately from the parallel oblique track. As a specific example,
A part of the redundant signal indicated by V, X, S, or R in FIGS. 12A and 12B (or FIGS. 4B, 5B,
The identification signal is multiplex-recorded on the overlapped portion indicated by A or D in FIGS. 9B and 10B. By reproducing the identification signal at the time of reproduction, it is possible to obtain an effect that it is easy to identify which type of signal is recorded and to faithfully restore the original correct signal.

The first and second video signals to which the present invention is applied are not limited to the above-mentioned signals of 1125 scanning lines, but 525, 625 and 10 scanning lines.
The present invention can be applied to video signals of any format such as 50 or 1250.

As an example, the first video signal is not limited to the high-definition HD signal as described above. For example, although not shown, NTSC of 525 scanning lines used in the current television system is used. Narrow band (4
MHz), and a scanning line conversion means is used to generate a high-definition pseudo HD signal having an occupied band of about 10 MHz corresponding to 1125 scanning lines on the input side and recording as the first video signal. And the above M having an occupied band of 8 MHz
The present invention can also be applied to a case where a USE signal is recorded as a second video signal. In this case, the first recording video signal (FIG. 2B or FIG.
V1 shown in FIG. 3) and the second recording video signal generated from the MUSE signal (V2 shown in FIG. 3B or 11B).
Since the occupied bandwidths are almost the same, m = 1 is set,
Both are recorded in a format as shown in the embodiment of FIGS. 12A and 12B. Also in this case, an identification signal for identifying which type of signal is recorded is recorded on a part of the magnetic tape.

Similarly, the second video signal is not limited to the MUSE signal having the occupied band of 8 MHz as described above, and the pseudo HD signal having the occupied band of 10 MHz generated by the above method is used as the second video signal. It can also be applied to a case where recording is performed and the HD signal having an occupied bandwidth of 20 MHz is recorded as a first video signal. In this case, the second video signal (pseudo HD signal) is recorded in a band of 1 / m of the first video signal (HD signal), and is recorded in a band of 20 MHz without limiting the band of the HD signal. If so, m = 2
Or the band of the HD signal is set to, for example, 1
/ 2 (or band compression to 1/2)
When recording in the MHz band, m = 1 is set.
In particular, when recording with the latter set to m = 1,
Both the first video signal (HD signal) and the second video signal (pseudo HD signal) have the same band and the same format (for example, FIG. 11).
Since the signal can be recorded and reproduced in the same format (for example, the format shown in FIG. 12A) in the signal format V1 shown in FIG. 12A, in this case, it is determined which signal is recorded in which format. An identification signal for identification is not particularly necessary.

Further, in the present invention, the video signals to be recorded are not limited to the first and second two types of video signals, but the first video signal and the second video signal.
In addition to the video signal, the present invention can be applied to a case where the third video signal is selectively recorded by one device.

For example, the scanning line 112 is used as the first video signal.
The embodiment in which the five HD signals are inputted and the MUSE signals of 1125 scanning lines are inputted as the second video signal and these are selectively recorded is as shown in FIG. Further, the NTSC signal of 525 scanning lines is input as a third video signal, the band ratio to the first video signal is set to m = 4, M3 = 1, N3 = N1 / m = 1, and the third The video signal is recorded in one segment per channel.

More specifically, when the first or second video signal is recorded in two channels and one segment with M = 2 and N = 1, as shown in the track-pattern of FIG. Tracks Ta1, Ta per frame
2, Tb1 and Tb2 are recorded on four tracks, and the third video signal is recorded on tracks Ta3 and Tb3 per frame.
Is divided into two tracks and recorded.

The third video signal NTSC can be recorded and reproduced by a conventionally known system used in a current home VTR or the like, for example, a VHS system. Under this condition, in the embodiment of FIG. 1, the traveling mechanism system for the drum 3, the capstan 4, and the magnetic tape 6 is constituted by the same or compatible mechanism as the conventional home VTR. Under this condition, the first or second video signal is transferred to the first magnetic head 1a, 1b (or 2a, 2b).
Although the third video signal is not shown, a recording / reproducing circuit based on the above-mentioned known method is provided in another system, and the first magnetic head 2a, 2b or the drum 3 is provided with the first magnetic signal. Recording and reproduction are performed by second magnetic heads 3a and 3b provided separately from the head.

Here, the magnetic heads 3a and 3b cause a time axis fluctuation (velocity error) of a high frequency in a video signal reproduced by the magnetic heads 1a and 1b (or 2a and 2b). To solve this problem, taking the timing of FIG. 4B as an example, the recording / reproducing magnetic heads 3a and 3b of the third video signal are
A magnetic head 1a for recording and reproducing the first and second video signals;
A position slightly trailing in the rotational direction from 1b (or 2a, 2b) (for example, the angle between the area A and the area B on the track shown in FIG. 4B is within 5 + 14.9 = 19.9 degrees).
It can be solved by attaching to In other words, before the first magnetic heads 1a and 1b (or 2a and 2b) start scanning the image area C, the second magnetic heads 3a and 3b, which follow the first magnetic heads 1a and 1b, scan and enter the tape. In addition, it is possible to eliminate the influence of the disturbance of the impact due to the entry of the second magnetic heads 3a and 3b into the tape. Similarly, the first magnetic heads 1a, 1b (or 2a, 2a,
Since the second magnetic heads 3a and 3b are scanned and protruded from the tape after b) has finished scanning the image area C, the influence of the disturbance of the impact due to the tape protruding of the second magnetic heads 3a and 3b is also included. Can be removed. Generally, while the first magnetic head (1a, 1b, 2a, 2b) scans the area C where the video signal is recorded, the second magnetic head (3a, 3b) is moved by the magnetic tape (6).
In the relationship that scanning does not enter or protrude,
By disposing the second magnetic head and the second magnetic head, the influence of the impact disturbance can be prevented.

In order to prevent the magnetic heads from interfering with each other, while at least one of the first and second magnetic heads is scanning the tape, the other head is prevented from sliding on the tape. Providing a mechanism for perturbing the head is an effective method. Also, in the case where the first and second magnetic heads are slid on magnetic tapes having different wear characteristics from each other, the head perturbation mechanism allows the head to be attached to the tape when the combination of the tape and the head is different. Scanning and sliding can be prevented, and the effect and effect of protecting the head and the tape and extending the life can be obtained.

According to the above embodiment, most of the mechanical system can be shared, and a tape recorded by a conventional home VTR or the like can be reproduced by this apparatus. In addition to the high-definition video signal, compatible reproduction of the current video signal is also possible, and the effect of increasing the added value of the device is obtained.

Next, the embodiment shown in FIG. 1 shows a case where the video signal is recorded in units of lines by analog (FM) recording. However, the present invention is not limited to this, and so-called digital The present invention can also be applied to a case in which a video signal is PCM-coded and recorded in units of sampled pixels of a video signal. In the case of analog recording, as described in the above embodiment, the parameter values for each track (the number of recording lines L1, L2, the line period TH1,
TH2) is set, but in the case of this digital recording, instead of the line-based signal, the signal is specified by a block-based signal composed of data of a plurality of sampling pixels.

That is, in the case of digital recording,
First, in the first recording mode, a block including k1 sampled pixel data per block is sampled from the first video signal and converted into per line to include S1 sampled pixels. A first recording video signal is generated in units, the first recording video signal is divided into M channels in field units, and each channel is divided into N segments, and M × N signals are generated per field. (M × N × 2 tracks per frame), and digitally recorded. Each track is converted to a block number and converted into NB1 signals (converted to line numbers and converted to L1 lines). L1.times.S1 = NB1.times.k1 so that can be recorded.

In the second recording mode, the second video signal is sampled from the second video signal and converted into a line-by-line S2.
A second recording video signal is generated for each block including data of k2 sampling pixels for each block so as to include the number of sampling pixels, and a band between the first recording video signal and the second recording video signal is generated. The second recording video signal is divided into M × N / m tracks per field (M × N × 2 / m tracks per frame) according to the information amount ratio m, and digitally recorded. L2.times.S2 = NB2.times.k2 so that NB2 signals converted to the number of blocks (signals for L2 lines converted to the number of lines) can be recorded on each track.

Further, the tape speed at the time of recording the second recording video signal is set to be approximately 1 / m times the tape speed at the time of recording the first recording video signal. Is set so as to satisfy NB2 = NB1 × k1 / k2.

Incidentally, in the case of analog recording, it is general that the sampled pixels follow the time series order at the time of sampling in the line, whereas in the case of digital recording, the so-called interleave method is used. In general, the time series order of the sampled pixels is different from the time series order at the time of sampling. Therefore, the number of recording lines per track (L1, L2) in digital recording is included in the number of sampled pixels per line (S1, S2), the number of recording blocks per track (NB1, NB2), and per block. It is converted from the number of sampling pixels (k1, k2).

For example, the case where the numerical examples shown in FIGS. 2, 3, 4 and 5 are applied to digital recording as it is will be described. In the first recording mode, k1
When (= 100) data amounts are allocated to one block of signal and recorded (1 bit in case of quantizing with 8 bits per pixel and adding a redundant code such as an error correction code equivalent to 10% per block) The data amount per block is 8 × k1 × 1.1 = 880 bits).
Since the number of pixels sampled in one line of the first recording video signal V1 shown in (b) is S1 = 1700 samples, when this first recording video signal is digitally recorded in the pattern shown in FIG. Converted to the number of lines, L1 = 14
4.75 lines, NB1 = L1 x S1 /
k1 = 2460.75 signals are set to be recorded, and in the example of FIG.
30 lines (2210 blocks in number of blocks)
Is recorded.

On the other hand, in the second recording mode, when the data amount of k2 (= 100) sampling pixels is allocated to one block of signal and recorded, the second recording shown in FIG. The number of pixels sampled in one line of the video signal V2 is S2 = 85.
When this second recording video signal is digitally recorded in the pattern shown in FIG. 5, the number of lines is converted into L2 = 289.5 lines in each track, and the number of blocks is NB2 = L2 × S2. / K2 = 2460.75 (= N
B1) It is set so that signals for the number can be recorded.
In the example, the video information of 282 lines (the number of blocks is 2397 blocks) is recorded in each track.

In the present invention, the analog (F
Similarly to the case of M) recording, the signal to be subjected to digital (PCM) recording is not limited to only the first or second video signal, but may be the case where the third video signal is digitally recorded. Needless to say, it can be applied to Specifically, for example, in the track pattern shown in FIG. 13, the first or second video signal includes tracks Ta1, Ta2, Ta3, Tb1, Tb2,
Digital recording is performed on Tb3, and the third video signal is digitally recorded on tracks Ta3 and Tb3 per frame, and an identification signal for identifying these signals is recorded together on a part of the magnetic tape.

Further, the present invention can be applied to the case where the analog (FM) recording and the digital (PCM) recording are selectively performed by one device or performed simultaneously. Specifically, for example, in the track pattern of FIG. 13, the first video signal is divided into four tracks Ta1, Ta2, Tb1, and Tb2 for each frame and recorded analogly, and the second video signal (or the The third video signal) is track Ta per frame.
3. Digital recording is performed by dividing the track into two tracks of Tb3.
Or, conversely, the first video signal is digitally recorded, and the second video signal (or the third video signal) is analog-recorded. Neither of these depart from the gist of the present invention. In particular, according to these methods, a single device can use a single cassette tape to transmit a plurality of signals of different types having various image quality suitable for the purpose of use. Recording can be performed extremely efficiently.

[0124]

As described above, according to the present invention, a plurality of kinds of video signals having different bands, different effective scanning lines, and different signal formats can be processed by a single apparatus without increasing the circuit scale. Efficient recording and reproduction can be performed with almost the same image quality performance according to the difference in band, and in both analog recording and digital recording, one wideband high-quality recording function and the other narrowband long-time recording function reduce cost. It can be realized relatively easily with a small increase. In any of the recording modes, a track pattern having substantially the same track pitch and track inclination angle can be obtained and recorded in the same area on the track, and the adjacent tracks can be aligned on a line-by-line basis. And the effect of facilitating variable speed reproduction can be obtained. Furthermore, in any recording mode, all of the minimum effective video information necessary for the transmission of high-definition information is reliably recorded and reproduced. And a recording / reproducing apparatus for high-definition image information which is always faithful and accurate can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a video signal recording / reproducing apparatus according to the present invention.

FIG. 2 is a diagram showing one format of one video signal input / output in the embodiment.

FIG. 3 is a diagram showing one format of the other video signal input / output in the embodiment.

FIG. 4 shows a first example of the track pattern obtained in the above embodiment.
It is a figure showing the example of.

FIG. 5 shows a second example of the track pattern obtained in the embodiment.
It is a figure showing the example of.

FIG. 6 is a diagram showing one embodiment of a video signal recording processing circuit according to the present invention.

FIG. 7 is a diagram showing one embodiment of an FM modulation circuit according to the present invention.

FIG. 8 is a diagram showing one embodiment of a video signal reproduction processing circuit according to the present invention.

FIG. 9 shows a third example of the track pattern obtained in the embodiment.
It is a figure showing the example of.

FIG. 10 is a diagram showing a fourth example of the track pattern obtained in the embodiment.

FIG. 11 is a diagram showing another format of the video signal output in the embodiment.

FIG. 12 is a diagram showing a fifth example of the track pattern obtained in the embodiment.

FIG. 13 is a diagram showing a sixth example of the track pattern obtained in the above embodiment.

[Explanation of symbols]

 1a, 1b, 2a, 2b, 3a, 3b: magnetic head 3, drum 5, capstan 6, magnetic tape 100, video signal recording processing circuit 200, video signal reproduction processing circuit 300, servo control circuit 10, mode specification circuit 20 ... Mode discrimination circuit 30, 80... Matrix circuit 40... FM modulation circuit 50... Recording amplification circuit 60... Reproduction amplification circuit 70.

────────────────────────────────────────────────── (5) References JP-A-2-166675 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 9/79-9/898 H04N 5 / 91-5/956

Claims (15)

(57) [Claims] 1. A luminance signal (Y) and two color signals (PB, PB).
R or B-Y, R-Y) comprises, video to record any signal format different first video signal with each other (U1) and the second video signal (U2) parallel oblique tracks on the tape In the signal recording apparatus, in the first recording mode, the first video signal is sampled from the first video signal to generate a line-by-line first recording video signal (V1) including S1 sampled pixels per line. 1
A signal generating hand stage; the first recording video signal, (M is an integer) M number in field units is divided into channels, by dividing the each channel segment of N (N is an integer), 1 This is divided into M × N tracks per field (M × N × 2 tracks per frame) for recording, and is converted into the number of lines on each track to process a signal for L1 lines. A second recording mode, wherein in the second recording mode, the second video signal is sampled from the second video signal to generate a second recording video signal (V2) in line units including S2 sampled pixels per line. 2
A signal generating hand stage; the first recording video signal and in accordance with the ratio m of the band of the second recording video signal, the second recording video signal, one field per M × N / m pieces (1 frame per M × N × 2 / m
Second recording means for dividing the data into tracks and recording the signals, and processing each of the tracks so as to record a signal corresponding to L2 lines by converting the number of lines into the tracks. A video signal recording apparatus, wherein parameters are set so as to satisfy L2 = L1 * S1 / S2 and recorded. 2. The method according to claim 1, wherein the first and second signal generation means include a number of sampling pixels S per line of the first recording video signal.
1 is equal to or greater than m times the number of sampling pixels S2 per line of the second recorded video signal,
2. The video signal recording apparatus according to claim 1, further comprising means for performing digital signal processing so that S1.gtoreq.S2.times.m. 3. The digital signal processing means includes: negative synchronizing information (HS1) including a blanking signal of a predetermined level within a basic cycle (TH1) of one line of the first recording video signal; A signal (PB or PR) obtained by line-sequencing two color signals of a signal and a luminance signal (Y)
3. The video signal recording apparatus according to claim 2, further comprising means for outputting a signal obtained by multiplexing the signals in a time-division manner. 4. The digital signal processing means includes: negative synchronizing information (HS2) including a blanking signal of a predetermined level within a basic period (TH2) of one line of the second recording video signal; A signal (BY or RY) obtained by line-sequencing two color signals of a signal and a luminance signal (Y) output as a signal multiplexed in a time-division manner. The video signal recording device according to claim 2. 5. The digital signal processing means according to claim 1, wherein the frequency (fWM) for sampling the second video signal is 1 / m times the frequency (fWH) for sampling the first video signal (fWM = fWH / 3. The video signal recording apparatus according to claim 2, further comprising a unit configured to process the video signal. 6. The digital signal processing means sets a frequency (fRM) at which the second recording video signal is sampled,
One of the frequency (fRH) at which the first recording video signal is sampled
3. The video signal recording apparatus according to claim 2, further comprising means for processing the image signal at a rate of / m times (fRM = fRH / m). 7. The digital signal processing means sets a frequency (fRH) at which the first recording video signal is sampled,
R / W of the frequency (fWH) at which the first video signal is sampled
(Where R and W are integers). The number of scanning lines per frame of the first video signal is L, and the first video signal is Let SH be the number of samples per line obtained by sampling at the frequency (fWH), and an integer S1 satisfying S1 = SH.times.L.times. (R / W) / (2.times.N.times.L1) among the above parameters. 3. The video signal recording apparatus according to claim 2, wherein SH is set and processed. 8. The second recording means, wherein the number of scanning lines per frame of the second video signal is L, and each of the above parameters satisfies L2 ≧ L × m / (M × N × 2). 2. The video signal recording apparatus according to claim 1, wherein the recording is performed by setting the video signal to. 9. The first and second recording means record signals of a portion including a video effective line of each of the first recording video signal and the second recording video signal in substantially the same area (C) of each track. 2. The video signal recording apparatus according to claim 1, further comprising means for performing processing to perform the processing. 10. The first and second recording means record audio information input together with the first video signal and the second video signal in substantially the same area (B) of each track. 2. The video signal recording apparatus according to claim 1, further comprising means for processing the video signal. 11. The first and second recording means set the tape speed at the time of recording the second recording video signal to approximately 1 / m times the tape speed at the time of recording the first recording video signal. 2. The video signal recording apparatus according to claim 1, further comprising means for recording the video signal. 12. each other recording apparatus of a video signal to be recorded either a signal format different first video signal (U1) and the second video signal (U2) parallel oblique tracks on the tape <br/> In the first recording mode, the first video signal is converted to a first sample.
Sampled at the sampling frequency, and k1 of the sampled pixels
Digital for each sampled pixel (k1 is an integer of 2 or more)
Data and convert the converted digital data
Then, a signal of the unit of the first block is generated and the first block is generated.
1st recording signal composed of a plurality of blocks
A first signal generating means to generate No. a (V1); a first recording signal, at least the M-number in frames (M is an integer) is divided into channels, is the respective channels N (N (Integer) segment, and one frame
Digital recording is performed by dividing into M × N tracks per unit, and NB1 (NB1 is an integer) signal is recorded on each track in terms of the number of blocks in the first block.
First recording means and for, in a second recording mode, the said second video signal first
At a second sampling frequency different from the sampling frequency,
This is k2 of the sampled pixels (k2 is 2
Is converted to digital data for each sampling pixel
Based on the converted digital data.
Generates a signal in units of blocks, and uses the second block as a unit.
Depending on the ratio m of the bandwidth or amount of information and the first recording signal and said second recording signal; second signal generating hand stage and to generate a second recording signal composed of a plurality of blocks (V2) Te , The second recording signal is at least
Each frame is divided into M × N / m tracks for digital recording, and the second track is assigned to each track .
NB2 one in terms of the number of blocks of the lock (NB2 is an integer
And a second recording means for recording the signal of ( number) , and the above parameters k1, k2, N
A video signal recording apparatus , wherein B1 and NB2 are set so as to satisfy NB1 × k1 = NB2 × k2 and recorded. 13. The first signal generating means samples L1 lines for at least one frame of the first video signal, and samples S1 pixels for each line. , NB1, L1, and S1 are set so as to satisfy L1 × S1 = NB1 × k1, and the recording is performed. 14. The second signal generating means samples L2 lines for at least one frame of the second video signal, and samples S2 pixels for each line, and obtains each parameter k2 , NB2, L2, and S2 are set so as to satisfy L2 × S2 = NB2 × k2, and are recorded. 15. A video signal reproducing apparatus for reproducing a tape on which one of a first video signal (U1) and a second video signal (U2) having different signal formats is recorded on parallel oblique tracks. The first video signal is sampled from the first video signal to generate a first recording video signal (V1) in line units including S1 sampled pixels per line, and the first recording video signals are M (field units). M is an integer) channel,
Each channel is divided into N (N is an integer) segments, divided into M × N tracks per field (M × N × 2 per frame), and recorded. Is converted to the number of lines, so that the signal for the L1 line can be recorded. Alternatively, the signal is sampled from the second video signal and S
A second recording video signal (V2) in units of lines including two sampling pixels is generated, and the second recording video signal is generated according to a band ratio m between the first recording video signal and the second recording video signal. A signal is divided into M × N / m tracks per field (M × N × 2 / m tracks per frame) and recorded, and the number of lines is converted into the number of lines in each track and L2 lines are recorded. A signal is processed so that a signal can be recorded, and the above-mentioned parameters are set so as to satisfy L2 = L1 × S1 / S2, and the tape on which either the first or second recording video signal is recorded is read. Reproducing means for reproducing; identifying means for identifying whether the first or second recorded video signal has been recorded; responsive to the output from the identifying means, the second reproduced video signal from the reproducing means; Reproduce the first or second recorded video signal If the reproduction of the first recorded video signal is identified, a signal of the same format as the first video signal is restored and output, or the reproduction of the second recorded video signal is identified. Means for restoring and outputting a signal of the same format as the second video signal in the case of the second video signal.