JPS58187087A - Digital signal recording system - Google Patents

Abstract

PURPOSE:To prevent the shift of word at reproduction and dropout, by modulating an analog video signal of picture information digitally and providing a header signal at each picture element data at each prescribed scanning line number for the purpose of recording. CONSTITUTION:In a memory 9, one frame's share of luminance signals are written with an output pulse of a memory write controller 12, the signals are read out sequentially with the output pulse of a memory read controller 14 and color difference signals are written and read out in/from memories 10 and 11, and applied to a switching circuit 15 respectively. A signal generated at each switching of a still picture signal to be recorded is incoming to an input terminal 16 and applied to a header signal generator 17, and a 16-bit header signal is applied to a memory 18. The switching circuit 15 switches each digital signal from the memories 9, 10, 11 and 18 in the specified order, supplies it to a digital recorder 19 for the recording.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital signal recording method, and when generating a time-series composite signal of pixel data obtained by digital pulse modulation of an analog video signal and recording this on a recording medium, A time-series composite signal is divided into pixel data of a fixed number of adjacent scanning lines, and a header signal having at least a synchronization signal and a code for converting the number of scanning lines is added to the initial position of each divided signal. By recording a digital video signal with 625 scanning lines, it is possible to easily convert the number of scanning lines, and by recording a component-encoded digital video signal with 625 scanning lines, it is possible to easily convert the number of scanning lines. The object of the present invention is to provide a digital signal recording system that can be reproduced by common reproduction means in all countries of the world.

In recent years, video and audio signals have been converted to pulse code1i.
Digital video signals and digital audio signals obtained by digital pulse modulation such as (PCM) are recorded on a disc-shaped recording medium (hereinafter referred to as a "disc") as intermittent changes in bit strings, and changes in the intensity of light from the disc or A method of detecting a change in capacitance, reading a green signal, and reproducing it is being actively developed. Among these, a recording method for a digital audio disc is known in which a digital video signal between color still image information is added as additional information to a digital audio signal and recorded on the same track on the disc. Usually, a plurality of music programs are recorded on the same side of such a digital audio disc, and a digital video signal related to color still image information is recorded corresponding to each music program. In this case, the music program can be played using a universal playback system.

On the other hand, since the television system for playing back video signals is not universally accepted worldwide, in order to be able to play back in regions or countries where the television system differs from the television system for the video signal recorded on such a disc, it is necessary to As for the signal, it is necessary to convert it into a signal format that complies with the television system of the region or country in which it is to be reproduced and displayed. In particular, since the above-mentioned digital video signal concerns color still images that play an auxiliary role to aid the imagination of the listener who listens to the playback of the digital audio signal, the above-mentioned disc is compatible with the differences in television systems around the world. It is desirable to use a universal system regardless of the standard, and to playback in a signal format that complies with the Novision system.

Therefore, in view of the above points, the present invention provides a color still image ll1
etc., in a signal format that can be reproduced universally.
The digital video signal and furthermore the digital audio signal are recorded in a signal form that is not susceptible to the effects of signal shift or dropout, and one embodiment thereof will be described below with reference to the drawings.

FIG. 1 shows a block system diagram of an embodiment of the main part of the system of the present invention. In the figure, C11 is a video 4 signal source such as a color television camera, flying spot scanner, VTR, etc., and is supplied with a TV synchronization signal from a TV synchronization signal generator 2 as necessary to produce a color still image to be recorded. The three primary color signals are taken out and supplied to the matrix circuit 3. The matrix circuit 3 has 625 scanning lines and a horizontal scanning frequency of 15.625 kHz.
) and (RY) and convert them into ADt converter 4.5
and 6 separately. On the other hand, the output TV synchronization signal of the TV synchronization signal generator 2 is output from the clock generator 7.8.12.
and 13, respectively.

The AD converter 4 receives a 111 degree signal Y with a band of about 4.5MH7.
is sampled at a sampling frequency of 9 MH2 using a 9 MHz clock from a clock generator 7 and converted into a digital luminance signal using an 8-bit sampling frequency, and this signal is supplied to a memory 9. The converter 5 converts one of the color difference signals (B-Y) and (R-Y), which have a band approximately a fraction of the luminance signal, taking into account the well-known human visual characteristics. -Y), 2.25MH from clock generator 8
Sampling frequency 12°25MH2 based on the clock signal of 2
After sampling with 8 bits, the signal is converted into a digital color difference signal, and this signal is supplied to the memory 10. Furthermore, AD converter No. 6 outputs the upper V color difference signal (R-Y), based on the clock signal from clock generator 8, at a sampling frequency of 2.25 M)-tz and a quantization number of 8 bits, similar to AD converter 5. is converted into a digital color difference signal, and this signal is supplied to the memory 11.

The memory 9 writes the digital luminance signal for one frame, for example, in response to the output pulses of the memory write controller 12, and sequentially performs read operations in response to the output pulses of the memory read controller 14. The digital luminance signal supplied to this memory 9 is divided into 11 runs, for example, 45
This is a digital luminance signal at six sample points (456 pixels in the horizontal direction). In other words, when a II signal with 625 scanning lines and a horizontal scanning mm of 15.625 kHz is sampled at a sampling frequency of 9 MHz, the number of sample points on one scanning line is 576 (= 9 x 106, , / 156
However, among the video signals shown in horizontal scanning period units in FIG. 2, the video period VT that actually contains image information is about 80% of one horizontal scanning period (1H). Vertical synchronization signals and color burst signals can be added in the playback device, so the first half video period VT
It is assumed that digital luminance signals are supplied to the memory 9 at 456 sample points in the 456 sample points. Further, the digital luminance signal read out from this memory 9 is a digital luminance signal for 572 scanning lines containing image information among the 625 scanning lines, and the sampling frequency thereof is 94.
5kHz<or 88°1kHz), and the quantization number is 8 bits.

In addition, the digital color difference signal is written into the memory 10.11 for, for example, one frame based on a write control signal from the memory write controller 13, and the stored data is sent to the memory read controller 1 as an output read control signal from the O-ra 14. read out based on Since the sampling frequency of the digital color difference signal supplied to the memory 10 and 11 is 2.25 MHz, which is the same as that of the digital luminance signal, the number of sampling points per scanning line is 114 (= 45 MHz).
6,7'4) digital signals, which are stored in the memory 10.11 at a sampling frequency of 94.5k)-1z
(or 88°2kHz) and are read out as first and second digital color difference signals with a quantization number of 8 bits.

The first and second digital color difference signals, like the digital luminance signal, relate to image information of 572 scanning lines. The output digital signals of the Ls 9, 10 & 11 are respectively supplied to a switching circuit 15.

In use, signals generated each time the still image signal to be recorded is switched are input to the input terminal 16, and the header signal generator 1
7. As will be described later, the header signal generator 17 generates a 16-bit header signal, which is a set of signals and ]-codes forming part of the header, and stores this in the memory 18.
supply to.

The memory 18 stores the header signal at a sampling frequency of 47.25kl-1z (or 44.1klz), for example, with a period of 684 word transmission periods! It is read out in 16 bits and supplied to the switching circuit 15.

The switching circuit 15 switches each digital signal from the memories 9, 10, 11, and 18 in a predetermined order and outputs the signals shown in FIGS.
A digital video signal having a signal format as shown in the figure is generated and supplied to the digital recorder 19.
Let me record it here.

Note that a read control signal is output from the memory read controller 14 in synchronization with a clock signal from the digital recorder 19.

Next, the signal format of the above digital video signal will be explained in more detail. The digital video signal taken out from the switching circuit 15 includes a part of a 12-word header and, for example, 684 words for 2H (H is a horizontal scanning period).
A component encoded digital video signal section of
It is a signal that is synthesized alternately in time series, and a signal transmission end signal (hereinafter also referred to as rEOD signal) is added to the last word, and the image information for one frame is When transmitted, as shown in Figure 3, H1 to H8
286 (however, H3 to H286 are omitted from illustration)
Some of the 86 headers and ■1 to ■286 (but ■3 to
A total of 199,057 words of digital video signals are recorded, consisting of 286 video signal portions (285 is not shown) and one word of EOD signal (EOD). Therefore, in the digital video signal for one frame, if one word is transmitted in one channel with 16 bits in one block of the signal shown in FIG. 8, which will be described later, the signal period of this one block is Since the value is selected to be equal to the reciprocal of the sampling frequency of the signal, when the sampling frequency is 47.25 to 11, it will be transmitted in about 4.21 seconds, and 44.1k)-! When it is z, it is transmitted for about 4°51 seconds.

The above-mentioned header portions H1 to 4286 constitute the essential part of the present invention, and one embodiment of the signal format A is as shown in FIG. In the same figure, the vertical direction shows the human arrangement. Horizontal direction (indicates the time.) ゛ indicates the transmission time of the word. 1 of the header signal
In the first word, a synchronization signal 20 is placed to indicate the start of l\footer row (the upper ε3 bits have a value in 1C base [F[-j], and the lower 8 bits have a value of [F[-j]). 1
The hexadecimal number is selected as rF[lk2. Therefore,
When the synchronization signal 20 is expressed as a binary number, the upper 8 bits l~ are all "1", and the lower 8 bits are r 1111111
It becomes 0J.

Here, the values rFFJ and rFEj of the synchronization signal 20 are:
These values are assigned only to the synchronization signal in the digital video signal, and when these values exist in the video signal section (1) to (286), they can be easily changed to rFDj in the recording system shown in Figure 1. This prevents the playback device (described later) from erroneously determining that the signal is a synchronization signal. In addition,
This "FF" value indicates the brightest image data of the video signal, but normally this image data and the slightly darker rFEJ image data hardly appear, so even if these values are assigned to the synchronization signal 20, it is not practical. No problem.

Various identification codes are transmitted in the second word of the header signal following the synchronization signal 20 described above.

First, an image type identification code indicated by rMO[)E,l is placed in the upper four bits. This code determines whether the digital video signal to be recorded is a standard still image (the above description of FIG. 1 was based on the example of a standard still image) or a moving image using a run-length code. For example, this is a code that indicates whether the image is a still image with high definition and quality, such as 1125 scanning lines. Next, a transmission channel identification code indicated by r1P/2PJ is placed in the fifth upper bit. This code is a code that identifies which channel out of the four transmission channels described below, the digital video signal will be transmitted.When its value is "1", it means that it will be transmitted on 1P1, that is, the fourth channel. In this embodiment, this case will be explained as an example).When it is "0", it indicates that it is transmitted using 2P, that is, the 4th channel and the 3rd channel, a total of 2 channels. The types of images of the digital video signals transmitted through the channel and the third channel, respectively (for example, landscape paintings, portraits, musical performances, etc.).
1m, etc.), and you can select and enjoy your favorite image before viewing. Alternatively, the same image may be transmitted by one word each through the fourth channel and the third channel, that is, equivalently, the sampling frequency may be doubled.

Next, the upper sixth word of the second word of the header signal shown in FIG.
An image information amount identification code indicated by rFR/flj is arranged at the th bit, and this identifies whether the digital video signal to be transmitted is for one frame or one field. When the value is "11", it is for one frame, and when the value is "0", it is for one field. The signal format of the video signal section (described later) depends on whether the digital video signal is transmitted in units of one frame or in units of one field, so the playback device detects this and Image signals are captured in accordance with the signal format of .

Also, the next 1 bit of this image information amount identification code is r.
A screen transmission identification code indicated as A/rfJ is placed,
When the value is "1", it indicates that a still image digital video signal that should be displayed on the entire screen is transmitted (so-called full-screen transmission), and when the value is "0", it is displayed on a part of the screen. This indicates that a so-called partially rewritten digital video signal is transmitted.

Furthermore, the ``1'' shown in Figure 4 is a binary digit ``1'', and the values of each code placed up to the upper 7th bit are all ``0'', and this 8th bit is also temporarily rOJ. When the EOD signal shown in FIG.
Since all of the bits and lower 8 bits are set to "O", it may be erroneously detected as this EOD signal, so "1" is placed in order to prevent this.

In Fig. 4, rs and EJ indicate 2-bit special effect practical codes, which are displayed with special effects such as fade-in, screen change from the top or left side of the screen, etc. on the still image displayed on the screen. This is a code to identify the case. The next 2 bits of the above special effect practical codes rS and EJ are the scanning line number conversion code shown as r6LMODEJ, and the next 2 bits are rP and GJ that identify the type of program. Identification codes are placed respectively.

The code r'6LMODEJ for converting the number of scanning lines is used to convert a digital video signal with a 625-scanning-line system to a 525-scanning-line system using a playback device.
This code is necessary when converting the image information of the scanning lines of a book to the image information of 5 scanning lines and converting the number of scans. This is the code that shows. That is, when performing the above conversion of the number of scanning lines, the number of scanning lines is 6, shown as 1-6 in FIG. 6(A).
Based on the image information of the first to sixth scanning lines on the back of the 25-line method, the first to fifth scanning lines of the 525-line method shown as 1 to 5 in FIG. Image information is created using the first scanning line of the tree system (525 scanning lines).
To create image information for the 1st H of the 1st field, the 1st H of the 625-scanning system (1H of the W41 field) and the 2nd scan are repeated. The image information of each eye) is multiplied by the year and ×1.

Here, each digital data is divided by 1 pi,
If you move in the direction of SS, the amount of data will be doubled,
Furthermore, since there is a sum C shifted one bit at a time in the direction of the LSB,
In the first scan of the above 625 scanning line method, the first digital data obtained by shifting the wired digital data by 1 bit in the LSB direction and 2 bits in the LSB direction] By adding the obtained second digital data to the image information of the first scanning line, Hayabusa further adds the image information of the second scanning line of 625 scanning lines to this. By shifting the digital data by 2 bits each in the LSB direction and looking at the shifted digital data, uniform information for the first scanning line of the 525 scanning line system can be obtained.

Thereafter, in the same manner as above, as shown in FIGS. 6(A) and 6(B), the image information of the second, third, fourth, and fifth scanning lines of the 525 scanning line method is It is obtained by mixing the image information of the second and third, third and fourth, fourth and fifth, fifth and sixth scanning lines of the 625-line system at a predetermined mixing ratio. These mixing ratios can be seen from Fig. 6 (△) and (B).

The mixing ratio value for the scanning line to be set is r6LM.

By providing the code indicated by Dll, conversion to the 525 scanning line system in the playback device can be easily performed.

Next, the dual-type identification codes rP and GJ are used when transmitting digital video signals independently of each other using two channels, the fourth channel and the third channel. If the third channel is to transmit a digital video signal of several types of images or a special image synthesized in time series, how many types (here, up to four (type) indicates the value of the category number assigned to each image. Each of the images transmitted in this third channel requires display continuity,
Images that are inconvenient to switch to another type of image in the middle of display (e.g. musical scores, landscapes, illustrations, performers, etc.)
The image identification codes rP and GJ indicate categories and numbers assigned according to the types of these images.

Therefore, if the viewer selects to play the third Bouyannelle image and also specifies the desired category number, only the images in that category and dog number will be played continuously, and other categories and numbers will be played continuously. You will no longer be interrupted by the number image.

Furthermore, the codes for each pit shown as TrB19WJ and rB19RJ in FIG. 4 are write designation codes and read designation codes for two frame memories in the playback device, which will be described later, and both are "0" (or "7"). M when
The pixel data of the digital video signal is loaded into the first (or second) frame memory, and the stored data is read out and displayed on the screen. This means changing the content of the image while displaying it, resulting in
A video can be displayed on a portion of a still scene. On the other hand, rBl 9WJ is rOJT'rB19RJ is "1"
In this case, the pixel data read from the second frame memory is displayed while writing the pixel data to the first frame memory, and after completing the writing operation of the first frame memory, the EOD signal is used. The display screen is switched from the second frame memory to the first frame memory. Further, when rB19WJ is [11 and rB19] is [OJ], contrary to the above, pixel data read from the first frame memory is displayed while writing pixel data to the second frame memory.

Next, the third to sixth words of the header signal shown in FIG.
Address signal 21 indicated by B5-818 for each word.
a, 22a, 23a, and 24a are respectively binarized, and the memory stores two pixel data (pixel sample values), the upper 8 bits and the lower 8 bits of each word of the video signal section that is transmitted following this header signal. Indicates a circuit address signal. Here, the number of scanning lines of color television signals in the world is 625 or 525, and the digital video signal in the present invention is actually a time-series composite signal of pixel data of 572 scanning lines containing image information. However, since the number of scanning lines is 625, it is transmitted in two directions, so when the number of scanning lines is 525, the number of scanning lines is converted as described above in the playback device, and the number of scanning lines is converted as described above. accumulate. Therefore, the address signal for this memory circuit has different values for the pixel data of the upper 8 bits and 2 lower Q8 bits of one word, and for the 625 scanning line system and the 525 scanning line system.
This requires 14 address values, which is the same value as for the 5-wire system. Here, the address signal 21a is 62
Indicates the address value of the upper 8 bits of pixel data of one word of the video signal section in the 5-line system, and the address signal 22
a is the address value of the pixel data of the lower 8 bits of the 625 line method, 23a is the address value of the pixel data of the upper 8 bits of the 525 line method, and 24a is the address value of the pixel data of the lower 8 bits of the 525 line method. are assigned to indicate each.

The seventh to twelfth words of the header signal shown in FIG. 4 have the same configuration as the first to sixth words described above.
5 is compared to the synchronization signal 2o, both the upper 8 bits and the higher 8 bits have a value of 1 in hexadecimal format. The signals 21b, 22b, 2311, 24b are the second
Various types of word]-do and address signals 21a and 22a
.

The content has been selected to be the same as 23a and 24a. This is due to the following reason. As will be described later, the digital signal recorded on the disk 40 shown in FIG. 7 includes an error correction signal (shown as P in FIG. 8 and L as L in FIG. 8). Although most errors are corrected, there are rare cases where they cannot be corrected. In this case, for digital audio signals, the data is corrected using an interpolation circuit, etc., and for digital video signals, the immediately preceding pixel data is corrected by taking advantage of the fact that adjacent pixel data often have similar values. There are few problems even if the correction is corrected using -.

However, if there is no data correlation between adjacent signals such as a header signal, it is difficult to perform the above correction, and if the contents of the header signal are not transmitted, It is also not possible to import the digital video signal part of the digital video signal part, and for example, 2 pixels worth of pixel data is missing.In order to avoid these inconveniences, some information in the header is divided into 2 parts as shown in Figure 4. Even if the first half header signal part is not reproduced on the transmission path, pixel data is taken in using the f\jidder part of the I cliff.In addition, synchronization signal 20.2
Since each value of 5 is made different, it is possible to identify whether the synchronization signal is in the first half of the I\Jedder code portion or the synchronization signal in the second half of the header signal portion.

Next, to explain the A-mat (signals of the video signal sections 1 to 286 shown in FIG. 3), FIG. 5 shows an example of the signal format of the video signal sections In the figure, the set direction indicates the bit arrangement, and the upper side is M S
In B, the lower side shows I-S B, and the horizontal direction shows time, as in FIGS. 3 and 4. In this example, 2
As mentioned above, each of the 86 video signal sections v1 to V286 is composed of 684 words, and each video signal section consists of pixels of one scanning line among the pixels of adjacent scanning lines. Data is placed in the upper B bits, and pixel data of the other scanning line is placed in the lower 8 bits and transmitted. Therefore, the signal format of the first video signal part (1) is as shown in Figure 5, where the upper 8 bits of each word are the 8 samples of the first scan 1 (1st H of the first field) located in the upper part of the screen. A digital video signal sequence of points is arranged (that is, arranged in a matrix (pixel data from the pixel group in the first row out of several pixels constituting one screen are arranged), and the lower 8 of each word is arranged. The bit contains the digital video signal sequence (
That is, the pixel llc art from the pixel group in the second row is arranged.

In addition, in Fig. 5, YO-Y455 (however, Ylo-
Y 455 (not shown) is the first! of the digital luminance signal of the first scan line. Indicates each location of the 465th sample point from g1 point, Y456 to Y911 (however, Y466 to
Y911 is shown in the figure, and f) is each distribution from the first sampling point to the 456th sampling point of the digital 1st degree of the second scanning line!
shows. Also (RY) O~, (RY) +13,
(B-Y) O~<B-Y) 113 (Tadari, (R-Y)
To 2-(R-Y) +13 and (B-Y:l?(B
γ') N2 is 1 as shown! lr) l;J Digital color difference signals of the first scanning line 1-Y), (B-Y) show 6 distribution positions from the 1st water medium to the 114th probe.

! l! M! R'I')! 1,1・〜CR-Y
) 227. (B-Y)N1= (B
'I') 227<t::1fshi(RY) '1
6～(RY) 227tokuB-\) 1ijl
(E!-Y) (226 not shown) is the digital color of the second scan line u fR-'y'), (B-Y) of the first
t# Each 1i'21!2 from the main point to the 111th sample point
C! Indicates W. Therefore, the video signal section ~' 1 is the first
and 2H worth of pixel data of the second scanning line, and pixel data J, 2 of four points of the digital Wp degree signal.
The digital color difference of the species ffj W, ' is a signal that is repeatedly transmitted for each order of the six i]j elements i-e consisting of the pixel data of the 81 sample points of W,'. It is said to be a format. Note that the video signal sections v2 to v2
86 is also configured with the same signal format as vl.

In this way, the pixel data of 62 adjacent scanning lines are arranged in the same video signal section, taking into account the case where the number of scanning lines is converted from 625 to 525. This is to facilitate number conversion. Note that the EOD signal is all 16 bits rOJ, but in order to prevent this EOD signal from being erroneously detected, the values of each word in the video signal portions V1 to 286 are all "0".
], it is changed to another value that is close to all "O" such that only the LSB is "1".

Next, a recording system for recording a digital video signal having a signal format as shown in FIGS. 3 to 5 on a disk in time series along with a digital audio A signal will be explained.

In the system of the present invention, the digital video signal is transmitted on one or two of the four channels in total, and the digital audio A signal is transmitted on the other three or two channels. Explanation will be made regarding the case in which the digital audio signal is transmitted over the transmission line of the 3f17 channel in the same digital signal t11'F channel (47). The seventh figure is an embodiment of another essential part of the method of the present invention.
Name γ No. 2 41 size, c30. 31. 32
My husband is 3 years old, 11 years old and a NEET.
This is an input terminal where the r/o signals come in separately. ILL 4 + center sound image localization signal is included in the optical signal 12, and from this 14 real image localization of the center sound source, which could not be obtained with the conventional 2D A7 channel SJ LEO, is included.
, the listening range can be expanded. Also, 33 is a start signal input terminal, and 34 is 3-X? This is an input terminal for a cue signal that is generated every time the blind music program of the channel's ablog 4-dio signal is switched from the previous music program to another sound spring program t1.

Here, a disk 40 to be described later has a sampling frequency of 47.25kHz7 and a quantization number of 1 as the information amount for one channel.
Assuming that a 6-bit digital signal is recorded in time series on one track for four channels, the above three channels of analog audio signals are processed by the AD converter 35 at a sampling frequency of 47.25 kHz for each channel.
The signal is sampled at 1, converted into a 16-bit quantized digital audio signal (PCM audio signal), and supplied to the signal processing circuit 37. At the same time, the digital video signal having the signal format as shown in FIG. . In addition, the input terminal 33
The incoming start signal and the incoming cue signal at the input terminal 34 are respectively supplied to a control signal generating circuit 36, which generates a control signal having the configuration shown in FIG. 9, which will be described later.

This control signal is a signal used for position control (random access) of the pickup reproducing element such as the reproducing needle 74, and is supplied to the signal processing circuit 37 described above.

The signal processing circuit 37 rearranges these 16-bit 1 input digital signals and control signals from parallel data into serial data, and divides the digital signals of each channel into predetermined intervals. Separate each time, interleave them and make a time division child!
! do. Further, an error code correction signal, an error code detection signal, and a synchronization signal hit indicating the start of a block (frame) are added to generate a distribution signal.

FIG. 8 schematically shows an example of one block (one frame) in the recording signal generated as a result of signal processing by the signal processing circuit 37. One block is composed of 130 pits, and this is repeated. The frequency is the same as the sampling frequency, e.g. 4
It is 7.25kHz.

5YNC is a 10-bit fixed pattern synchronization signal bit indicating the start of a block, Ch-1 to ch-3 are 16-hit digital audio signals of the above three channels, and Ch-4 is the digital audio signal reproduced from the digital recorder 19 above. The figure shows each word of a 16-bit digital video signal. In addition, P and Q shown in Fig. 8 are each 16
Bit error code correction signal, for example, w4 (+)Q of pi=W1■W,■v1/4
−” T' W+ @T3.WaG) T'Wa fB
This is a signal generated by the formula T, W4 (:L). t, secondly 1), in formula (2), w, , wue,
W, , , V, ・'Good is Ch-1 to Ch-4 16
Each bit digital signal (usually a digital signal in each different block, ■ is the auxiliary 7 of a given polynomial)
The trix, Q) indicates the modulo 2 addition for each corresponding bit.

Furthermore, in FIG. 8, CRC is a 23-hit error code detection signal, and is a signal for detecting error codes of 23 hits, which are arranged in the same block.
, P, and Q, for example ×2゛tox''+x4F×1
This is the remainder of 23 pits obtained when dividing by a generator polynomial of -1, and when the signal from the 11th bit to the 129th bit [1] of the same block is divided by the above generator polynomial during reproduction, 1. It is used to detect that there is no error when the remainder obtained by this is zero. Furthermore, in FIG. 8, Adr is the control signal, which distributes each bit of data and transmits one bit in one block, for example, 126 bits.
All bits of the control signal are transmitted by blocks (that is, the control signal consists of 126 bits). Therefore, if the number of rotations of the disk 40 is 900 rpm, 3150 blocks are recorded and reproduced per disk rotation. From the above 126 bits? J III signal is disk rotation W4! II! It will be recorded and played back 25 times.

FIG. 9 schematically shows an example of the structure of the above control signal.

The total 126-bit control signal is composed of a 42-bit first chapter code CP-1, a 42-bit second chapter code CP-2, and a 42-bit time code TC. The first adapter code CP-1 is
A 17-bit synchronization signal, a 4-pin 1-mode signal,
It consists of an 8-bit chapter signal, a 12-pin chapter local address, and a 1-bit parity code obtained by adding the signal pins from the mode signal to the chapter local address modulo 2. The second chapter code CP-2 also has only the value of the synchronization signal, and the rest is the same as the first chapter code CP-1.
It has the same configuration and the same values as . The above mode signal is a signal indicating the type of 4-channel digital signal recorded on the disc 40, for example, "1100J
When , 3 channels of digital audio signals and 1
The digital video signal of the channel is recorded,
For rllolJ, a 4-channel digital audio signal is recorded, for 1110J, two types of 2-channel digital audio signal are recorded, and for [1111J, a 2-channel digital audio signal is recorded. This indicates that the digital video signal is recorded in two channels.

The chapter signal is a signal indicating the number of the recorded music program from the signal recording start position 1 on the disc 40.

Further, the time code TC shown in FIG. 9 includes, for example, a 17-bit synchronization signal and first and second chapter codes CP-
1. Similar to the mode signal in CP-2, 4 indicates the type of 4-channel digital signal recorded on the disc 40.
A total of 16 bits indicating the bit mode signal and the digit 1 of the recorded music program on the disk 40 as the total time from the signal recording start point.The 9 o'clock time identification code increases by - for each revolution of the disk 40. It consists of a 4-bit track M code indicating a value from 0 to 14 in binary code, and a 1-bit valid code. The above time identification code is expressed in minutes and seconds, and the minimum W4 is 1 second, whereas if the disk 40 rotates at 900 rpm, it will rotate 15 times per second. Even if the different codes have the same value, it is possible to identify the music program recording position W/I by the track number f (distinguishing each rotation of the screen 40') as shown in FIG. 8 by the signal processing circuit 37. A digital signal of 130 bits per block is taken out in series in block units and is supplied to a modulation circuit 38 (== shown in FIG. After that, the carrier wave of, for example, 7 MHz is frequency-modulated to obtain a frequency-modulated wave signal.This frequency-modulated wave signal is recorded on the D-SFF 110 using a laser beam or the like.

Using the Denosk recording method previously proposed by the applicant, 1.1.
In one case, the recording device 39 described above is constructed as shown in FIG. In the figure, the laser beam emitted from the laser light source 41 is removed by the optical converter II'i2, and then reflected by the recirculator 43 and reflected by the half mirror 14. The beam is divided into two optical paths. One of the divided laser beams is modulated in the optical modulator 45 by the output 1 wave number modulated wave signal of the modulation circuit 38 from the input terminal 7'16 and a third tracking control reference signal @fp3 to be described later. 1 modulated light beam. The other divided laser beam is sent to the optical modulator 47.
, the recording from the input terminal 48 [for first or second tracking control described later, which alternately enters every rotation period of W2O? The second modulated light beam is modulated by the optical signal fLll or frI2.

The first modulated light beam is reflected ffl 50 'r and is reflected 3! ¥FStfi changed silisodrical lenses 51 and 52. By passing through an information recording optical system consisting of a slit 53 and a convex lens 54, the recording source II
491 'C'' is shaped into a rectangular light beam.On the other hand, the second modulated light beam is shaped into a circular light on the recording master 49 by a tracking recording optical system consisting of a convex lens 55, a slit 5G, and a convex lens 57. The optical path is changed by the rear ti4 mirror 58.

The first and second modulated light beams, each shaped into a desired shape, are combined substantially on the same optical axis by a polarizing prism 59, pass through a half mirror 60, and have their optical paths changed by a prism 61. Furthermore, slit 62. Recording lens 63
[On the recording master 49 on which the photosensitive agent layer 65 is formed on the glass substrate 64, the first modulated light beam is shaped like a rectangle indicated by 66, and the second modulated light beam is shaped like a circle indicated by 67. Focused irradiation is applied to the shape.

The recording source 149 is disk-shaped and rotates synchronously at a constant speed.The light reflected from the half mirror 60 is applied to the signal monitoring system 68, and the light reflected from the prism 61 is applied to the monitoring optical system 69. Added. The distance between the two modulated light beams on the recording master 49 is measured by a monitoring optical system 69, and the deviation is monitored by a signal monitoring system 68, and the deviation is corrected by moving the cylindrical lens 51 vertically in the figure. Let's do it.

The recording master disk 49 is used to create a stamper disk through a known Ill processing process and a molding process. On the disk 40 copied by this stamper board, the three channels of digital audio signals described above and one channel of digital video signals in the signal formats shown in FIGS. 3 to 5 are sequentially recorded in the signal format shown in FIG. 8. A wi-shaped main track in which a frequency modulated wave of a signal synthesized in time series for each block is recorded as an intermittent bit string, and an approximately midway portion between each track center line of adjacent main tracks. First and second tracking control reference signals f l) in the form of bursts of striking frequencies that alternately exist in a band lower than the band of the frequency modulated wave for each disk rotation period.
A sub-track is formed by a bit string in which f 1 and f D2 are intermittent, and furthermore, f pl, r p
A third tracking control reference signal fI)3 is recorded on the main track of the second switching connection portion. Further, this disk does not have a guide groove for tracking the playback needle, and has an electrode function.

As described above, according to this embodiment, the component encoded digital video signal portion, which is a time-series composite signal of pixel data from each pixel arranged in a matrix on the screen, is divided into two adjacent rows of pixel groups. Each pixel data is divided, and a header signal with a signal format as shown in FIG. 4 is added to each divided signal, and an EO is added to one word at the end.
The digital video signal to which the D signal has been added is synthesized with the digital audio signal in time series and is sequentially recorded word by word on the disk 40.

Next, an explanation will be given of an apparatus for reproducing digital signals recorded on the disc 40 according to the method of the present invention.

FIG. 11 shows a block diagram of an example of a digital signal reproducing device. In the figure, the disk 40 is a turntable (
(not shown) and rotated synchronously at 900 rpm. As shown in FIG. 12, on the disk 40 there is a main track with a track width TW and a track pitch TP, in which a flat surface 70 and a bit 71 are repeated, and a tracking control system in which a flat surface 70 and a bit 72 are repeated. Reference signal @ rpi recording sub-track and flat surface 70
As mentioned above, the tracking control reference signal f p2 recording sub-track is formed by running over the bit 73 and the bottom surface 74b of the reproducing needle 74 on the surface of the disk 40. is slid away.

As shown in FIG. 11, the regeneration needle 74 is fixed to one end of a cantilever 75, and a permanent magnet 76 is fixed to the base side of the other end of the cantilever 75. cantilever 7
The part to which the permanent magnet 76 of No. 5 is fixed is a tracking coil 77 and a jitter correction coil 7 fixed to the playback device.
It is surrounded by 8. The tracking coil 77 generates a magnetic field in a direction perpendicular to the magnetic field direction of the permanent magnet 76, and moves the cantilever 75 in one direction in the track width direction according to the polarity of the tracking error signal from the tracking servo circuit 79. And, it is displaced by an amount of displacement corresponding to its size.

Resonance in which the resonant frequency changes in response to the electrostatic capacitance l formed between the disk 40 and the electrode 74a shown in FIG. a circuit that applies a constant frequency to this resonant circuit, a circuit that amplitude-detects a high-frequency signal whose -C amplitude changes according to a change in the capacitance from the resonant circuit, and this amplitude-detected high-frequency signal ( The high-frequency reproduction signal taken out from the pickup circuit 80 consisting of a circuit for pre-amplifying the reproduction signal is F M t! 1 circuit 81, where the main information signals of the main track (in this case, a digital audio signal and a digital video signal synthesized in time series) are respectively recovered, while a part is branched and sent to a tracking servo circuit. 79.

The tracking servo circuit 79 detects the first signal from the reproduced signal.
to third tracking control reference signal f p1 to f
p3 is frequency selected and extracted, both reference signals f pl,
A tracking error signal obtained by differentially amplifying the envelope detection output of f p2 is output to the tracking coil 77. However, f pl, f p for the main track
Since the recording positional relationship of 2 is switched every one rotation period of the disk 40, the tracking polarity is switched every one rotation period of the disk 40 by the switching pulse generated based on the detection output of the tracking control reference signal fp3. . The tracking servo circuit 79 controls the tracking coil 77 so that when a kick instruction signal is received at the input terminal 82, the playback needle 74 is forcibly moved in the track width direction by one track pitch or more.
to drive.

On the other hand, the demodulated digital signal taken out from the FM demodulation circuit 81 is applied to the decoder 83, where it is MFM-decoded and converted into a time-series composite signal in the signal format shown in FIG. The beginning of a signal block is detected, the serial signal is converted into a parallel signal, and further error detection is performed. Only when an error is detected, the error signal is corrected and restored using the error code@correction signals P and Q. In this way, the 16-bit 4-channel digital signal is corrected and restored as necessary, and the signal arrangement is returned to its original order before interleaving, and each of the three channels is The 16-bit digital audio signal is
The signals are converted into analog audio signals by the DA converter in the decoder 83 and output to the output terminals 84, 85 and 86, respectively. Further, the pickup control signal is output to a predetermined circuit (not shown) for high-speed position search and the like.

On the other hand, the digital video signal in the -71mN format shown in FIGS. 4 and 5, which is reproduced in time series in the fourth channel, is supplied to the scanning line number conversion circuit 87 shown in FIG. The number of lines is converted from 625 lines to 525 lines. Here, as described above, in the digital video signal, the scanning lines of the first field and the scanning lines of the second field are related to image information of scanning lines that are alternately selected from the bottom of the screen. Since the code r6LMODEJ for converting the number of scanning lines in the header signal is reproduced, the number of scanning lines can be easily converted.

As described above, the scanning line number conversion circuit 87 is a necessary circuit for a reproduction device that reproduces an input signal as an NTSC-compliant analog color video signal with 525 scanning lines, and here, a circuit having this circuit 87 is used. As explained in , SECAM method with 625 scanning lines or PAL
It is not necessary when playing back as an analog color video signal that conforms to the standard. Of course, in this case, a changeover switch may be provided to change over the input and output of the scanning line number conversion circuit 87, and this may be changed according to the television system to be reproduced. The 525-scanning-line digital video signal serially extracted from the scanning-line converting circuit 87 is supplied to a switch circuit 88 .

Furthermore, the digital video signals sequentially and time-sequentially extracted from the decoder 83 in the single signal format shown in FIG.
The signal is also supplied to a synchronization signal detection circuit 89, a header signal detection circuit 91, and a memory write controller 92, respectively. The synchronization signal detection circuit 89 detects the synchronization signal 20 or 25 shown in FIG. 4 and the EOD signal in the header signal, and supplies the detection signal to the control circuit 90. Header signal detection circuit 91 discriminates each code in the header signal shown in FIG. 4 and supplies it to control circuit 90.

The control circuit 90 outputs a synchronization signal detection signal and a reset signal]
- Specify both types (several types of special images II identified by the above-mentioned dual type identification codes "P, GJ") of the playback device instruction manual inputted to the input terminal 93 by an external switch operation, etc. signals (category/number signals), etc. are supplied, and these input signals are discriminated and decoded to control the scanning line number conversion circuit 87, switch circuit 88, Takamori light controller 92, switching circuit 97, etc. Switch circuit The output digital video signal of the scanning line number conversion circuit 87 selectively outputted by 88 is supplied to one of the memories 94 and 95, where it is controlled by the write control signal from the memory write controller 92 as shown in FIG. AT signal 21a to 24a (or 21b to 24
h) (Here, since this is a device that plays back the same 525-scanning ra and water charge ablog color video signal, the address signals 23a and 24a (
23b and 24b) after converting the number of scanning lines) k sequentially. Also memory 94
．． 95 contains the header portions 111 to H286 shown in FIG. 3 and the EOD (No.
The memory write controller 92 is controlled so that 86 pixel data groups are written.

Normally, reproduced pixel data is written into the memories 94 and 95 alternately one frame or one field at a time, but in this embodiment, the memory 94 or 95 designated by the writing ΔdrB19WJ shown in FIG. Write reproduced pixel data within the horizontal blanking period.

The memories 94 and 95 simultaneously read out the written reproduction pixel data based on the readout command from the memory read controller and synchronization signal generation circuit 96, and also compensate for jitter associated with reproduction. Here, memory 9
The digital luminance signals read from 4 and 95 are read out at a sampling frequency of 9MH7 and the number of subdivisions is 8 bits, and the first and second digital color difference signals are read out at a sampling frequency of 2MH7 and 8 bits, respectively.
25M)-1z, the quantization number is 8 bits, and the signal is read out and supplied to the switching circuit 97.

The switching circuit 97 selectively outputs the readout output of one of the memories 94 and 95 in response to a switching control signal from the control circuit 90 and supplies it to the DA converters 98, 99 and 100. Here, the switching circuit 97 selectively outputs the read output of the memory 94 or 95 specified by the read designation code rB19RJ shown in FIG.
Among the memories 4 and 95, the memory which had been selectively outputting the read output is switched to the read output of the other memory. The time required for switching the switching circuit 97 is normally quite short, but when special effects such as fade-in are performed, m<
For example, switch gradually over a period of 1 second) or 1 step.

Among the three types of f-inter signals that passed through the switching circuit 97,
The digital luminance signal is digital-to-analog converted by the DA converter 98G and supplied to the encoder 101 as an all-log luminance signal.On the other hand, the two types of digital color difference signals are converted into digital-to-analog signals by the DA converters 99 and 100, respectively.
Analog converted color difference signals (B-Y) and (R-Y)
and is supplied to the encoder 101. encoder 1
01 is an NTSC signal based on these three types of analog signals, a horizontal synchronization signal, a vertical synchronization signal, a color burst signal, etc. from the memory read controller and synchronization signal generation circuit 96.
A color video signal conforming to the standard is generated and outputted from the playback output terminal 102 to a monitor color television receiver (not shown), where the audio signal is output from the output terminals 84, 85, 86 and played back. Color still images, partial moving images, etc. are displayed as supplementary information for music listening by the signal listener.

By the way, the above scanning line number conversion circuit 87 is shown in FIG. 6(A).
, (B), when converting from the 625 scanning line system to the 525 scanning line system, each of the pixel data of two adjacent scanning lines among the six scanning lines of the 625 scanning line system is is mixed at a predetermined one of four mixing ratios to obtain pixel data for one scanning line. The code r6LMODEJ indicates which of the four mixing ratios it corresponds to, but it is not limited to this, and this scanning line number conversion code r6LM
ODEJ may be any code that indicates scanning line number conversion information that corresponds to the conversion operation of the scanning line number conversion circuit 87 in advance.

Therefore, when the scanning line number conversion circuit 87 converts 6 scanning lines of the 625 scanning line system to 5 scanning lines of the 525 scanning line system, the scanning line number conversion code r6LMODEj converts the above 6 scanning lines. It may also be a scanning line number indicating which line it is. Note that 3 bits are required to indicate which of the 6 scanning lines corresponds, but for the video signal format shown in Figure 5, the number of scanning lines in the header signal is converted. ]-do "61~40r) FJ
is provided for pixel data for two scanning lines, so there are three types of states for the 1st and 2nd, 3rd and 4th, and 5th and 6th of the 6 scanning lines. Therefore, in this case, the scanning line number conversion code r6LMODEJ may be 2 bits as in the embodiment.

Note that the music program and the color image played from the disk 40 need to be played in synchronization with each other, but the pixel data of one frame (or one field) stored in the memory 94.95 is It takes a certain amount of time to memorize
It is necessary to record the digital video signal a certain period of time in advance of the start of display of the image, so the recording start position of each music program and the recording start position of the digital video signal that is played from the beginning of the music program are different. The latter is recorded in advance for the above-mentioned certain period of time. Therefore, when randomly accessing the disc 40, the reproducing device 74 is moved at high speed in the inner or outer peripheral direction of the disc 4o, and the control signal in the signal format shown in FIG. 9 is reproduced to program the desired H music program. When it reaches the beginning of the desired music program, playback in any mode such as normal playback starts from there, but in such cases, playback starts from the middle of the digital video signal. Sometimes. In such a case, in the method previously proposed by the applicant, the synchronization signal existed only at the first position of the digital video signal of one field or one frame of the image, so the synchronization signal was not played back from the middle of the above. Although it was not possible to display the digital video signal, according to this embodiment, as shown in FIG. Even when the digital video signal is reproduced, the digital video signal after the first reproduced header part can be taken into the memory 94 or 95 and displayed.

Furthermore, when displaying lyrics or the like in a portion of the screen, if both image information of only that portion is transmitted in a concentrated manner, that portion can be quickly changed. Similarly, a moving image can be played back on a limited small screen portion of the screen 7 In other words, a limited °IX screen portion 1 within one playback screen 4 shown in FIG.
If you want to play 1111 pictures on 06, this small screen part 1
Address signals 21a to 24 specifying the address of 06
n, 21h □” 24b, and then transmitting pixel data is repeated. In FIG. 13, 105 indicates the transmission position of the header part. However, this As mentioned above, is not displayed on the screen 104. The pixel data of the small screen portion 106 is written to the memory of the memory 94 and 95 on the side from which the digital video signal displaying the image on the screen 104 is read. Therefore, the written pixel data is displayed as a moving image on the small screen portion 10G.

In the case of partial image transmission, the transmission time changes depending on the display area, so why? The images displayed on the screen have a short transmission period and can be made into moving images.

In the above case, standard image transmission with 625 scanning lines was explained, but in the case of high-definition, high-quality uniform transmission, or when transmitting a moving image using a run-length code, the image type identification code This fact is identified by the value of "rM01]F", and the transmission format is also made different from that in FIG.

Also, the value of the image type identification code rMODEJ is discriminated and reproduced, and the output signal of the control circuit 90 controls the scanning line number conversion circuit 87 and the memory write controller 92 as necessary to select the format for loading into the memory 94.95. . For example, when it is determined by the code rMODEJ that a high-quality, high-definition digital video signal has been reproduced, the memory write controller 92 is controlled so that the memories 94 and 95 do not take in this reproduced digital video signal ( Alternatively, the memory write controller 92 is controlled so that the above-mentioned reproduced digital video signal is compressed and read into the memory 94, 95 in the necessary scanning lines. In addition, the number of scanning lines of the above high-quality reproduced digital signal is 112,512.
The circuit operation of the scanning line number conversion circuit 87 may be changed so as to use a 5 x 625 line system or a 525 line system. Also, transmission for one frame and transmission for one field can be mixed, and a part of the header remains the same at 12 words in either case, but the image information amount identification code rFR/F〒' The values and signal formats are different (1
In the case of field transmission, the video signal portion divided into every 2H is divided into 143 parts in total and transmitted), and the playback device discriminates this code rFR/FLJ and stores it in its memory 94.
95 according to the format at that time-C
Let's do it.

Even if the digital video signal supplied to the memory 94, 95 deviates by one word for some reason, it is corrected by reproducing part of the next header, and errors due to temporal deviations of words are not accumulated.

Note that the division unit of the digital video signal recorded on the disk 40 by the method of the present invention is not limited to the above-mentioned embodiment, and the point is that the display screen is gradually switched to another uniform image while displaying a - image. ← 2. If the human eye does not perceive that the color and brightness are being switched separately, 2 degrees is sufficient. For example, the maximum number of scanning lines is 10! It is also possible to transmit the pixel data by adding a part of the header to the pixel data.

). In addition, the digital video signal is divided into one frame or one frame.
The data for one field may be transmitted through two channels, Ch-3 and C11-4 shown in Fig. 8. In this case, the reproduced digital video signals of the two channels are reproduced in chronological order and transmitted as one. Transmitted by book transmission line.

In the above embodiment, the number of scanning lines of the video signal is 25.
Although it was made of wood, the signal recording format 41 of digital audio discs such as disc 40 was made universal so that it could be played back worldwide, and the P△1 method or SEC
This is to ensure that there is no shortage of information when reproducing a video signal compliant with the AM system.

In addition, in the above explanation, the case where it is applied to the disc recording system and playback device proposed earlier by the present applicant was explained, but it is not limited to this, and the electrostatic blind edge change having a tracking guide groove is explained. The present invention can also be applied to readable discs and discs in which a recorded green signal is read by a light beam. Also, the television receiver has R, G.
, B, a matrix circuit is used in place of the encoder 101 to input the three primary color signals R, B from the luminance signal Y and color difference signals (RY), (B-Y). By converting into G and B and supplying them to the above input terminals separately, the television receiver can perform
It is capable of producing high-quality still images. Further, the color difference signals recorded on the disk 40 may be a combination of (G-Y) and (RY) or (B-Y), and may also be I signals, Q signals, or three primary color signals.

As mentioned above, the digital signal recording method according to the present invention is
A time-series composite signal of pixel data obtained by digital pulse modulation of an analog video signal of image information to be recorded is generated, and this time-series composite signal is divided into adjacent pixel data for each constant scanning number. , at the initial position of each of the divided signals, at least a synchronization signal and a line number conversion code indicating scanning line number conversion information that corresponds in advance to the conversion operation of the scanning line number conversion circuit in the playback device. Since a digital video signal is recorded on a recording medium by adding a header signal that each has, it is easy to convert the number of scanning lines when playing back this recording medium, and the header signal is added for each fixed number of scanning lines. Since it is added to each pixel data,
The F2 time-series composite signal is a component-encoded signal consisting of a 625-scanning-line digital luminance signal and two types of digital color difference signals, making it less susceptible to word shift drop-out during playback, so it can be used worldwide. High-quality color images can be reproduced and displayed using the reproduction means of 1-) AL method with 625 scanning lines and S E CA! Video transmission compliant with v1 system':''
3. It has the advantage of ensuring that there is no shortage of information when growing naturally.

[Brief Description of the Drawings] Fig. 1 is a block system diagram showing an embodiment of the main part of the present invention, Fig. 2 is a diagram showing the image information part to be transmitted in a video signal, and Fig. 3 is a block diagram showing an embodiment of the main part of the method according to the present invention. A diagram schematically showing an embodiment of the structure of one frame of a digital video signal recorded by the method of the present invention, and FIG. 4 is a diagram showing an embodiment of the signal format of the header signal in FIG. 3. , FIG. 5 is a diagram showing an example of the signal format of the video signal section in FIG. A diagram showing an example of the method, FIG. 7 is a diagram showing an embodiment of another essential part of the method of the present invention, and FIG. 8 is a diagram of one block of signals previously proposed by the applicant to which the method of the present invention can be applied. FIG. 9 is a diagram showing an example of the signal format of the control signal in FIG. 8. FIG. 10 is a system diagram showing an example of the recording device in FIG. 7. FIG. A block system diagram showing an example of a digital signal reproducing device,
FIG. 12 is a partially enlarged perspective view showing an example of the sliding situation between the playback needle and the disc-shaped recording medium in FIG. 11, and FIG. 13 is a diagram illustrating the screen rewriting operation on the limited small screen. 1... Video signal source, 2... TV synchronization signal generator,
3... Matrix circuit, 4, 5, 6.35... AD
Converter, 9.10.11.18.94.95... Memory, 15.97... Switching circuit, 17... Header signal generator, 19... Digital recorder, 20.25
...Synchronization signal, 21a to 24a, 21b to 24
b...address signal, 30-32...analog audio signal input terminal, 36...111m11 signal generation circuit, 37...signal processing circuit, 39...recording device, 40...disk-shaped recording Medium (disc), 41...
Laser light source, 42° 45.4V...Light modulator, 49
... Master disc, 59... Polarized Brism, 60...
・Half mirror 161...prism, 74...regeneration needle, 74a...electrode, 76...permanent magnet, 79...
- Tracking servo circuit, 80...Pickup circuit, 83...Decoder, 84-86...Analog audio signal output terminal, 87...Scanning line number conversion circuit,
88... Switch circuit, 89... Synchronous signal detection circuit, 90... Control circuit, 91... Header signal detection circuit, 93... Input terminal for both types of designated signals, etc., 98-100
... DA converter, 101 ... encoder, 102.
...Agilent video signal output terminal, 106...Small screen portion to be rewritten, Hl, H2...Part of header, ■1 to V286...Video signal section, EOD...
Signal transmission end signal (EOD signal). +A+ Figure 6 (8) Figure 7 8 Figure 8 Figure 9 Figure 10 Figure 11 Figure 13 Continued from page 1 72 Inventor Fujio Suzuki 3-12 Moriyamachi, Kanagawa-ku, Yokohama Victor Japan Co., Ltd. Inventor: Koji Tanaka 3-12 Moriyamachi, Kanagawa-ku, Yokohama Inventor: Mitsuo Kubo Inventor: 72 within Victor Co., Ltd., 3-12 Moriyamachi, Kanagawa-ku, Yokohama Inventor: Amano Yoshiaki 7-12 Moriyamachi, Kanagawa-ku, Yokohama City, Japan Victor Co., Ltd. Inventor: Hikaru Kikuchi, 3-12 Moriyamachi, Kanagawa-ku, Yokohama, Japan Victor Co., Ltd.

Claims (1)

[Claims] 1. Generate a time-series composite signal of pixel data obtained by digital pulse modulation of an analog video signal of image information to be recorded, and generate a time-series composite signal of a fixed number of adjacent scanning lines. A scanning signal that is divided into pixel data of each pixel and indicates, at the initial position of each divided signal, at least a synchronization signal and scanning line number conversion information that corresponds in advance to the conversion operation of the scanning line number conversion circuit in the reproducing device. 1. A digital signal recording method characterized in that a digital video signal including a header signal each having a line number conversion code is recorded on a recording medium. 2. The digital video signal has a 625-scanning line system, and the scanning-line number conversion code is based on the 625-scanning line number circuit.
Corresponding to the operation of converting the scanning lines of a book into 5 scanning lines and converting to the 525 scanning line system, the scanning line number indicating which number of the 6 scanning lines □ is present. A digital signal recording system according to claim 11ii, characterized in that: 3. The digital video signal has 625 scanning lines, and the scanning line number conversion code is such that the scanning line number conversion circuit converts pixel data of two adjacent scanning lines among the six scanning lines. are mixed at a predetermined one of the four mixing ratios to obtain pixel data for one scanning line, which is then converted into five scanning lines, resulting in a total of 525 scanning lines. The digital signal recording system according to claim 1, characterized in that the information indicates which of the four types of mixing ratios corresponds to which of the above-mentioned four types of mixing ratios corresponds to the operation of converting into a digital signal recording system. 4. The digital signal according to claim 1, wherein the time-series composite signal is a component encoded signal consisting of a 625-scanning-line digital luminance signal and two types of digital color difference signals. Signal recording method.