JPS58184891A - Digital signal reproducer - Google Patents

Abstract

PURPOSE:To reproduce sound and picture of high quality, by splitting a time series synthesis signal arranged in matrix into a luminance signal and two color difference signals at each prescribed number of adjacent rows and columns and providing a header signal for the head of each split signal. CONSTITUTION:A matrix circuit 3 receives an output of a video signal source 1, and splits a digital luminance signal Y and color difference signals B-Y and R-Y at each prescribed adjacent number of rows and columns. The split signals Y, B-Y and R-Y are AD-converted 4-6 and inputted to a switching circuit 15 under the control of a clock signal or a memory write controller via memories 9-10. A header signal having picture type codes is given from a header signal generator 17 to the head of each signal and the result is given to the circuit 15. When the code of the header signal is coincident with the code of a signal setting a specific type of picture from an external input terminal 16, the circuit 15 transmits the synchronized luminance and color difference signals to an encoder.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital signal reproducing device in which pixel data (m image signal components) of pixel groups of adjacent pixel groups are divided for every certain number of rows or columns, and each of the divided signals is divided into pixel data (m image signal components). A recording medium on which a digital video signal having at least a synchronization signal and a header signal (identification signal) having both types of identification codes is added is played back, and the code of the header signal in the played digital video signal is identified. A digital signal reproducing device capable of selecting and reproducing only color uniformity information of a desired category number from among two or more color image information sequentially reproduced by comparing this with a type designation signal from an external source. The purpose is to provide

In recent years, video and audio signals have been converted to pulse code II.
Digital video signals, digital audio signals, etc. obtained by digital pulse modulation such as (P'CM) are recorded on a disc-shaped recording medium (hereinafter referred to as "disc") as intermittent changes in bit strings, and optical signals are output from the disc. Systems are being actively developed to read and reproduce the green signal by detecting changes in intensity or capacitance. Among these, a recording method for a digital audio disc is known in which a digital video signal related to color still-1 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 surface of such a digital audio disc, and digital video signals related to color still information are recorded corresponding to each of the six music programs, but <II: ( 7) IU, playback t, m・1 go. music,. Lamb can be regenerated using a universal regeneration 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, the above-mentioned digital video signal is related to digital audio, a color still image that plays an auxiliary role to help the imagination of the listener who listens to the playback sound of Oshingetsu. It is desirable to use a universal system regardless of the differences in the system, and to reproduce the signal format in accordance with each I revision system.

Therefore, the present invention aims to address the above points and record a digital video signal based on a component encoding method for color still images, as well as to create a header signal that allows partial screen correction and partial video playback. A digital video signal is reproduced from a recording medium recorded in a predetermined cycle in an optimal signal format based on a header signal, and one embodiment thereof will be described below with reference to the drawings.

First, the recording system for the digital video signal to be reproduced by the apparatus of the present invention will be described. FIG. 1 shows a block diagram of an example of the main part of the recording system for the digital signal.゛In the figure, 1 is a video signal source such as a color television camera, a flying spot scanner, or a VTR, and if necessary, a TV synchronization signal from a TV synchronization signal generator 2 is supplied to produce a color still image to be recorded. The three primary color signals relating to the three primary colors are extracted and supplied to the matrix circuit 3. The matrix circuit 3 has 625 scanning lines and a horizontal scanning frequency of 15.
625k 1-1z luminance signal Y, color difference signal (B-Y)
and (RY) and supply these separately to AD converters 4.5 and 6, respectively. On the other hand, the output TV synchronization signal of the TV synchronization signal generator 2 is supplied to clock generators 7.8.12 and 13, respectively.

The AD converter 4 receives a luminance signal Y with a band of about 4.5 MHz,
The signal is quantized using a pseudo-quantization number of 8 bits sampled at a sampling frequency of 9 MHz using a 9MH7 clock from a clock generator 7, and is converted into a digital luminance signal, and this signal is supplied to a memory 9. The AD converter 5 converts one of the color difference signals (B-Y) and (R-Y) into a band approximately a fraction of the luminance signal by considering the well-known human visual characteristics.
2.B-Y) from the clock generator 8. '25M H
MH2 to sampling frequency 2°2 based on Z clock signal
After sampling with 8 bits, the signal is quantized into a digital color difference signal, and this signal is supplied to the memory 10. Furthermore, the AD converter 6 converts the color difference signal (R-Y) into the AD converter 5 based on the clock signal from the clock generator 8.
Similarly, it is converted into a digital color difference signal with a sampling frequency of 2.2', 5 MHz, and a quantization number of 8 bits, 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 main unit 9 is a digital luminance signal at a sample point of 456 m (horizontal pixel number: 456) per scan. That is, the number of scanning lines is 625.
When a luminance signal with a horizontal scanning frequency of 15,625 kHz is sampled at a sampling frequency of 9M1-1z, the sample points of one scanning line are 576 (= 9 x 106 / 156
However, the video period VT which actually contains image information on the back side of the video signal shown in horizontal scanning period units in FIG. 2 is about 80% of one horizontal scanning period (one day); Since each vertical synchronization signal and color burst signal can be added in the reproducing device, it is assumed that digital luminance signals are supplied to the memory 9 at 456 sample points in the first half video '#4 VT. Also, this memory 9
The digital luminance signal read out from 625 scanning lines is a digital luminance signal related to 572 scanning lines containing image information, and its sampling frequency is 94.
5k) 12 (or 88° 1kHz), quantization number 8 pits.

Further, the memory 10.11 is a memory light controller:,',
1 The digital color difference signal is read in, for example, one frame based on the input signal from the troller 13,
The stored data is read based on the output read 11011 signal of the memory read controller 514. The digital color difference signal supplied to the memory 0.11 is a digital signal with a sampling frequency of 114 (=456/4) sampling points per 11 scanning lines for each digital luminance, and this is a digital signal that is sampled from the memory 0.11. frequency 94
．． The signals are read out as first and second digital color difference signals of 5kHz H7 (or 88°2kHz) and 8-pit quantization. The first and second digital color difference signals, like the digital luminance signal, relate to image information of 572 scanning lines. Each output digital signal of memories 9, 10 and 11 is supplied to a switching circuit 15, respectively.

On the other hand, the input terminal 16 receives a signal generated each time the still image signal to be recorded is switched, and the header signal generator 1
7'. The header signal generator 17 constitutes a part of the header as shown in □ below! (.

A 16-bit header signal, which is a collection of signals and codes, is generated and supplied to the memory 18.

The memory 18 stores the header signal at a sampling frequency of 47.25 kHz (or 4
4.1k H2) Quantization number 16 bit'/l-r is read out 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. 3 to 5.
A digital video signal having a signal format as shown in the figure is generated and supplied to a digital recorder 19 where it is recorded.

Note that a read control signal is outputted from the memory read controller 14 in synchronization with the readout 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, 2H of 684 wands (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 l
-1286 (however, H3 to H286 are omitted from illustration)
286 Hera-women part and ■1~V286 Kudashi v
A digital video signal of If 199,057 words is recorded, consisting of 286 video signal sections indicated by 3 to 285 (not shown) and a 1-wand EO'D signal indicated by EOD. Therefore, in the digital video signal for one frame, when 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 it is selected to be equal to the reciprocal of the signal sampling frequency,
When the sampling frequency is 47.25kHz, it is transmitted in about 4.21 seconds, and when it is 44.1kHz, it is transmitted in about 4.51 seconds.

The signal format of the above header part H1~H286 t~
An example is shown in FIG. In the figure, the vertical direction shows the bit array, with the upper side being the MSB (most significant bit) and the lower side being the LS8 (least significant bit).
Significant bits), and the horizontal direction indicates time. ■ indicates opening when transmitting one word. A synchronization signal 20 is arranged in the first word of the header signal to indicate the start of the header signal, and the upper 8 bits have a hexadecimal value of "FF" and the lower 8 bits have a hexadecimal value. The value at is selected as rFEJ. Therefore, synchronization signal 2
When 0 is expressed as a binary number, the upper 8 bits are all 1s.
, its lower 8 bits are r11111110.

Here, the values rFFJ and rFE-1 of the synchronization signal 20 are values assigned only to the synchronization signal in the digital video signal, and
If these values exist in 6, they are changed to rFDJ in advance by the recording system shown in FIG. 1, to prevent the playback device described later from mistakenly identifying them as synchronization signals.
Note that this value "1FF" indicates the brightest image data of the video signal, but normally this image data 4 and the slightly darker image data rFEJ hardly appear.
There is no practical problem even if these values are assigned to the synchronous signal @20.

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 rMODEJ is placed in the upper four bits. This]-code indicates whether the digital video signal to be recorded is a standard still image (the above description of FIG. For example, high definition with 1125 scanning lines,
^ This is a code that indicates whether the image is a high-quality still image. Next, a transmission channel identification code indicated by rlP/2PJ is placed in the fifth upper bit. This code identifies which channel out of the four transmission channels described below the digital video signal is to be transmitted, and when its value is "1", it is IP.

In other words, it indicates that it is transmitted on 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, a total of 2 channels, the 4th channel and the 3rd channel.

In the case of 2P, the types of images of the digital video signals transmitted on the 4th channel and the 3rd channel (for example, landscape painting, boat play 1~, performance FRll, etc.) are made mutually interesting, so that viewers can choose their favorite. You can choose whichever image you like and enjoy it. Also, the 4th channel and the 3rd channel
The same image may be transmitted in one word for each channel, that is, the sampling frequency is doubled equicomparably.

Next, the upper sixth word of the second word of the header signal shown in FIG.
At the th bit, an image information amount discreet code indicated by "rFR, /FT" is arranged, and this code determines whether the digital video signal to be transmitted is for one frame or one field. A value of "1" indicates one frame, and a value of "0" indicates one field. The digital video signal is transmitted in units of one frame, and the signal format of the video signal section described later depends on whether it is transmitted in units of one field.

The reproducing device detects this and captures the image signal according to the signal format at that time.

Also, the next 1 bit of this image information layer identification code is FA.
The screen transmission identification code indicated by /PJ is placed and the value is 11.
'' indicates that a digital video signal of a still image that should be displayed on the full screen is being transmitted (so-called full screen transmission).
, and when the value is "0", it is displayed on a part of the screen to indicate that a so-called partially replaced digital video signal is being 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 of the F notation are all ``O'', and this 8th bit is also hypothetically When it becomes "0", the EOD signal shown in FIG.
Since both bits and the lower 8 bits are set to all "0", the EO and D signals may be erroneously detected, so rlJ is provided to prevent this.

In Fig. 4, Is and EJ indicate 2-bit special effect practical codes, which are used to display special effects such as fading in, changing the screen from the top or left side of the screen, etc. on the still image displayed on the screen. This is a code to identify it when it is used. The above special effect practical code rs, E”
The next two bits are for scanning line number conversion indicated by r6LMODEJ, and the next two bits are rP6. Both types of program code 31 are arranged for identifying the type of program shown in the GJ.

The code for converting the number of scanning lines r6LMODEJ is the number of scanning lines 6.
25-line digitized video signal.

When converting to a 525-scanning-line system on a playback device, the four types of scanning-line number conversion required are simply converted from image information of 6 scanning lines to image information of 5 scanning lines. Co 1: indicates one of the mixing ratios. That is,
When performing the above conversion of the number of scanning lines, the first scanning line of the 625 scanning line system shown as 1 to 6 in FIG. According to the same figure (B)
The image information of the first scanning line 1 to the fifth scanning line of the 525 scanning line system shown as 1 to 5 is created in the 525 scanning line system. To create image information for the 1st H' of the field, the first scanning line (1H' of the 1st field) and the 2nd scanning line of the 625 scanning line system are
Here, each self-image with scan m (first H of the second field) is converted into digital data 1 bit by 1, S,
It is well known that digital data of scanning lines will be multiplied by 7 if the SB direction is shifted one bit at a time in the H direction of SB. By adding the first digital data obtained by shifting 1 bit at a time in the LSB direction and the second digital data obtained by shifting 2 bits at a time in the 18B direction, the number of scanning lines erb is added. By adding the digital data obtained by shifting the digital data of the second scanning line of this method by 2 bits each in the SB direction, image information of the first scanning line of the 525-scanning-line method can be obtained. It turns out.

Hereinafter, in the same manner as above, as shown in FIGS. 6(A) and (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 625 second and third, third and fourth, fourth and fifth, fifth and sixth scanning lines at a predetermined mixing ratio. These mixing ratios are given in four types of patterns as shown in FIGS.
By giving the code shown in ODEJ, playback@
This means that it is possible to easily convert to a system with 52Q scanning lines at the same time.

Note that if this code r6LMOD'EJ is not given, in the case of the n-th scanning line, it is necessary to calculate the mixing ratio from the remainder when dividing this by 6.

Next, the two types of 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. , and the third channel transmits a special image in which several types of digital video signals are synthesized in chronological order. 1 (in this case, up to 4 types)
Each of the images transmitted through the three channels requires display continuity, and it is inconvenient to switch to a different type of image in the middle of display (e.g. musical scores, scenery, illustrations, performers, etc.), and both of the above The species identification codes rP and GJ indicate category numbers assigned according to the types of these images. If the subordinate selects to play an image on the third channel and specifies a desired category number, the image of that category number will be displayed.
) will be played continuously and will not be interrupted by images of other category numbers.

Further, in FIG. 4, the 1-bit codes shown as "B19so" and rB19RJ are the write designation code and readout designation code for two frame memories in the playback device, which will be described later, and both are "0" (or " 1), pixel data of a digital video signal is written into the first or second frame memory, and the stored data is read out and displayed on the screen. This involves displaying an image and changing its content, which results in
It is possible to display a video on a portion of a still image.

On the other hand, when rB19WJ is "0" and rB19RJ is "1", the pixel data read from the second frame memory is displayed while writing the pixel data to the first frame memory, and the pixel data read from the second frame memory is displayed. After the write operation is completed, the display screen is switched from the second frame memory to the first frame memory by the OD signal. Furthermore, rB 19WJ is "1" and [::8 mouth 9RJ is "
0'', 1, the pixel data read from the first frame memory is displayed while writing the pixel data to the second frame memory, contrary to the above.

Next, the third to sixth words of the header signal shown in FIG.
Address signals 21 indicated by 83 to 818, respectively, are applied to the word word.
a, 22a, 23a, and 24.a are arranged, and the two pixel data (pixel sample value ) shows the address signal for the memory circuit. 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 it is transmitted using a 625-scanning-line method, when playing back using a 525-scanning-line method, it is necessary to convert the number of scanning lines in the playback device (as described above) before converting the Therefore, the address signal for this memory circuit is 1.
The upper 8 bits and lower 8 bits of a word are two different values for pixel data, and the number of scanning lines is 625 and 52.
A total of four address values, different values for the five-wire system, are required. Therefore, the address value @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 lower 8 bits of pixel data in the 625 line method, 23a is the address value of the upper 8 bits of pixel data in the 525 line method, and 2.4.8 is the address of the lower 8 bits of pixel data in the 525 line method. They are assigned to indicate their respective values.

The seventh to twelfth words of the header signal shown in FIG. 4 have the same structure as the first to sixth words described above, and the synchronization signal 2
5 differs from the synchronization signal 20 in that both the first 8 bits and the lower 8 bits have hexadecimal values of "FF", and the other various codes of the 8th word and the address The signals 21b, 22b, 23b, 24b are the second
Various codes of word th and address signals 21a, 22
a.

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 error correction signals @ (indicated by P and Q in FIG. Most of the errors that occur are corrected, but there are rare cases where they cannot be corrected. In this case, for digital audio signals, data correction is performed using an interpolation circuit, etc., and for digital video signals, the data of the immediately preceding pixel is corrected by taking advantage of the fact that adjacent pixel data often have similar values. There are few problems even if the data is used for correction.

However, if there is no f-event correlation between adjacent words, such as in a header signal, it is difficult to perform the above correction, and if the content of the header signal is not transmitted, the digital data immediately after it is It also becomes impossible to capture the video signal portion, resulting in, for example, two days' worth of pixel data being missing. Therefore, in order to avoid these inconveniences, some information in the header is sent twice as shown in Figure 4.
Even if the first half of the header signal part is not regenerated on the transmission path,
The second half of the header signal portion is used to capture pixel data. Since the eight synchronization signals 20 and 25 are different, it is possible to identify whether the synchronization signal is the first half header signal portion or the second half header signal portion.

Next, the signal formats of the video signal sections V1 to 286 shown in FIG. 3 will be explained. FIG. 5 shows an embodiment of the signal format of the video signal section V1. In the figure, the vertical direction shows the bit array, the upper side is the MSB, the lower side is the LSB, and the horizontal direction shows the time.
It is similar to FIG. 4. As mentioned above, in this embodiment, each of the 286 video signal parts v1 to v286 is composed of 684 words, and each video signal part is composed of one scanning line of pixel data of adjacent scanning lines. The Ml data of the scanning line is placed in the upper 8 bits, and the 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 section ■1 is the fifth
As shown in the figure, the upper 8 bits of each word are arranged as a digital video signal sequence of each sample point toward the first scanning line (first H of the first field) located at the upper end of the screen (that is, arranged in a matrix). The pixel data from the pixel group in the first row is arranged behind the plurality of pixels constituting one screen, and the lower 8 bits of each word contain the second scanning field (second field). A digital video signal sequence (1j, pixel data from the pixel group in the second row) of each sample point of the first F1) is arranged.

In addition, in FIG. 5, YO to Y455 (however, Ylo-
, Y455 (not shown) indicates each arrangement position from the first sampling point to the 465th sampling point of the digital luminance signal of the first scanning line, and Y456 to Y911 (however, Y466 to Y9
11 (not shown) indicates each arrangement position of the digital luminance signal of the second scanning line from the first sample point to the 456th sample point. Also (RY)0~. (RY)113, (8-Y)
O~(B-Y) 113 <However (R-Y)
2~(RY) 113 and (B-Y) 2~
(B-Y) 112 is not shown) is the first scanning line de(
The arrangement positions of the digital color difference signals (R-Y) and (B-Y) from the first Kusumoto point to the 114th sample are shown.

Furthermore, (RY) 114 to (RY) 227. (B
-Y) 114 ~ (B -Y) 227 (Just R-Y) 116 ~ (R-Y) 227
(B-Y) 116 ~ [3-Y 226 not shown)
is the digital color difference signal (RY) of the second scanning line, (8-
Each arrangement position from the first sample point of Y) to the JI1114 sample point is shown. Therefore, the video signal section v1 consists of a group of 2H worth of pixel data of the first and second scanning lines, including pixel data of four sample points of the digital luminance signal and one sample point of each of the two types of digital color difference signals. The signal format is such that six pixel data consisting of pixel data of 1 and 2 are set as one unit, and the signal is transmitted repeatedly for each unit. The video signal sections (2) to (286) also have the same signal format as Vl.

The reason for arranging the pixel data of two adjacent scanning lines in the same video signal section is to take into account the case where the number of scanning lines is converted from 62'5 to 525. This is to facilitate conversion of the number of scanning lines. Note that the EOD signal is all 16 bits "0", but in order to prevent it from being detected by this EOD (!! number - CllI-), the value of each word of the video signal section v1 to ■286 is all "0". ”, then only L S B becomes “1”
" is changed to another value close to all "0".

Incidentally, among the image information of various categories (in this case, up to four types) identified by the two-type identification codes IF' and Gj, the same image information is the video signal □ part V1 for one frame. ~■286 or one field of video signal portions may be transmitted together, but the invention is not limited to this, and images and information of different categories may be mixed and transmitted sequentially. In the latter case, the same time II at each playback point of the digital video signal, which will be described later (actually, the degree of time difference required to transmit 684 words of one video signal section differs, but it appears to be the same time when entering the park). )
It is possible to selectively display a different type of uniform minus sign. Further, among the image information that has mutually different categories, it is possible to increase the number of transmissions per unit time for those that are different from each other, and to decrease the number of transmissions for other types of image information.

Next, a recording system for recording digital video signals in signal formats as shown in FIGS. 3 to 5 on a disk in time series along with digital audio signals will be described.

In the method of the present invention, a digital video signal is transmitted through one or two transmission channels out of a total of four transmission channels, and a digital audio signal is transmitted through the other three or two channels. A case will be explained in which both the signal and the digital audio signal are transmitted through a two-channel transmission path. .

FIG. 7 shows a block system diagram of an example of other essential parts of this recording system. In the figure, the same components as in Figure 1 are given the same reference numerals, and 30, 31, and 32 are input terminals to which three channels of analog audio signals are respectively input. A signal for central sound image localization is included, and from this it is possible to obtain a real constant position of the central sound source and an expansion of the listening range, which could not be obtained with conventional two-channel stereo. Further, 33 is a start signal input terminal, and 34 is an input terminal for a cue signal generated each time the music program of the 6 analog audio signals of the 3 channels is switched from the previous music program to another music program.

Here, a disk 40 to be described later has a sampling frequency of 47.25kHz2 and a troweling number of 1 as an information member for one channel.
Assuming that 6-bit digital signals are recorded in chronological order on one track for 4 channels and 7 channels, the above 3-channel analog audio signal is converted to a sampling frequency of 47.5 by the AD converter 35 for each channel. 25kHz
-(
The signal is supplied to the signal processing circuit 37. At the same time, a digital video signal having a signal format as shown in FIG. W43, which is reproduced by the digital recorder 9, is reproduced at a sampling frequency of 47.25 kHz and a matrix number of 16 bits, and is supplied to the signal processing circuit 37. Also, input terminal 3
The incoming start signal and input terminal 3, and the incoming cue signal 34 are respectively supplied to a control signal generation/'' circuit 36, which generates a control signal having the configuration shown in FIG. 1119, 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 the input digital signals and control signals of these 16-bit 1F14 channels from parallel data to serial data, and divides the digital signals of each channel into predetermined intervals. , and interleave and time-division multiplex them. Then, a recording signal is generated by adding an error code correction signal, an error code detection signal, and a synchronization signal bit indicating the start of a block (frame).

FIG. 8 is a diagram schematically showing an example of one block (one frame) in the recording signal generated as a result of signal processing by the signal processing circuit 37, where one block is composed of 130 bits. The repetition frequency is the same as the sampling frequency, for example 47.25 kHz.

5YNC is a 10-bit fixed pattern synchronization signal bit indicating the start of a block, ch, -i to Ch-3 are 16-bit digital audio signals of the above three channels, respectively, and Ch-4 is reproduced from the above digital recorder 19. P and Q shown in FIG. 8 are respectively 16-bit error code correction signals, for example, P=W, ■W2■W3■ W+ 'I)o=
■', w, ■7'W2■cho'A%/3■cho・W4
This is a signal generated by equation (1). However, in formulas (1) and <2), w, w, w, w4 are Ct
2 ah 16-bit digital signals from 1 to 0h-4 (usually digital signals in different blocks), ■
is an auxiliary matrix of a predetermined polynomial, and ■ indicates addition modulo 2 for each corresponding bit.

Furthermore, in FIG. 8, the CRC is a 23-pit error code 1 to C1.
For example, each word of 1-4, P, and Q is written as XJj x-f+,
It is the 23-bit remainder obtained when dividing by the generator polynomial of It is used to detect that there is no error when the remainder obtained by However, all bits of the control signal are transmitted by, for example, 126 blocks (1J control signal consists of 126 bits).

Therefore, if the number of rotations of the disk 40 is 90 Orl), 3150 blocks are recorded and reproduced per disk rotation, so the above 126-bit control signal is recorded and reproduced 25 times during the disk rotation period. become.

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 chapter code CP-1 is 1
．． , , a 17-pit synchronization signal, a 4-pit mode signal, an 8-bit chapter signal, a 12-bit chapter low address, and 2 signal bits from the mode signal to the chapter low address. The second chapter code CP-2 also differs from the first chapter code C except for the value of the synchronization signal.
It has the same configuration and the same values as P-1. The mode signal shown in is a signal indicating the type of 4-channel digital signal recorded on the disk 40, for example, l-1.
When 1004, a 3f''+z channel digital audio signal and 1 channel digital video signal are recorded, and when 1-11014, a 4 channel digital audio signal is recorded, and r111
When it is 0J, two types of 2-channel digital audio signals are recorded, and when it is "1111", it shows that two channels of 2-channel f digital audio signals and digital video signals are recorded.

The chapter signal is a signal indicating the number of the recorded music program from the signal recording start position 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-
Similar to the mode signals in 1 and 0P to 2, 4 indicates the type of 4-channel digital signal recorded on the disk 40.
The mode signal of the pit, a time identification code of 16 bits in total indicating the position of the recorded music program on the disc 40 as a total time from the signal recording start position, and a time identification code of 0 to 14 that increases by - for each revolution of the disc 40. It consists of a 4-pit track number code that indicates the value of the track number in binary code, and a 1-bit parity code. The above time identification code is expressed in minutes and seconds, and the minimum unit is 1 second.
When the disk 40 rotates at 90° rpm, it rotates 15 times per second, so even if the time identification codes have the same value, the music program recording position can be identified by the track number each time the disk 40 rotates. be able to.

The signal processing circuit 37 sequentially extracts the digital signal of 130 pits per block shown in FIG. ), for example, 7M
A Hz carrier wave is frequency modulated to produce a frequency modulated wave signal. This frequency modulated wave signal is recorded on a disk 40 by a recording device 39 using a laser beam or the like.If the disk recording method previously proposed by the present applicant is applied, the above recording device 39 will be recorded as shown in FIG. The configuration is as shown in . In the figure, a laser beam emitted from a laser light source 41 is removed by an optical modulator 42 to remove drift and noise, and then reflected by a reflecting mirror 43 and divided into two optical paths by a half mirror 44. . The divided laser beams are sent to the input terminal 46 in the optical modulator 45.
The light beams are modulated by the output frequency modulated wave signal of the modulation circuit 38 and a third tracking control reference signal fp3 to be described later to form eleven modulated light beams. The other divided laser beam is transmitted to the optical modulator 47 by a first or second tracking control reference signal f pl or tp2, which will be described later, which alternately enters each rotation period of the recording source I 149 from the input terminal 48. It is modulated into a second modulated light beam.

The first modulated light beam is reflected by the cylindrical lenses 51 and 52 . By passing through an information recording optical system consisting of a slit 53 and a convex lens 54, the light is shaped into a rectangular shape on the recording master 49. In addition, the second modulated light beam is transmitted through a convex lens 55. A tracking recording optical system comprising a slit 56 and a convex lens 57 shapes the light into a circular shape on the recording master 49, and then the optical path is changed by a reflecting mirror 58.

The first and second modulated light beams, each shaped into a desired shape, are combined on substantially the same optical axis by a polarizing prism 59, pass through a half mirror 6o, and have their optical paths changed by a prism 61. Furthermore, slit 62. Recording lens 63
, 'C:' Recording in which a photosensitive agent layer 65 is formed on a glass substrate 641 [llI491, the first modulated light beam is formed in a rectangular shape indicated by 66, and the second modulated light beam is formed in a rectangular shape indicated by 67. The irradiation is focused in a circular shape as shown in .

The recording master disc 49 is disk-shaped and rotates synchronously at a constant speed, and the light reflected from the half mirror 60 is applied to the signal monitoring system 68, and the light reflected by the prism 61 is applied to the monitoring optical system 69. added to. The separation between the two modulated light beams on the recording master 49 is measured by the monitoring optical system 69, and the deviation is monitored by the signal monitoring system 68, and the deviation is corrected by moving the cylindrical lens 51 in the vertical direction in the figure. Do the following.

The recording master disk 49 is subjected to a known image processing process and a stamper disk. 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 spiral main track in which the frequency modulated wave of the signal synthesized in block units in time series is recorded as an intermittent bit string;
Approximately in the middle between the track center lines of adjacent main tracks, first and second burst-shaped bursts of a single frequency, which are in a band lower than the band of the t2 frequency modulated wave, are alternately arranged every disk rotation period. 2 tracking control reference signals fp1 and f
A sub-track is formed by a bit string in which p2 is intermittent, and a third tracking control reference signal fp3 is recorded on the main track at the switching connection portion of fpl and fp2. Further, this disk does not have a guide groove for tracking the playback needle, and has an electrode function.

In this way, 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 pixel data of two adjacent rows of pixel groups. , a header signal of the signal format shown in Fig. 4 is added to each divided signal, and a digital video signal with an EOD signal added to the last word is synthesized with the digital audio signal in a time-series manner. is written one word at a time, and the disk 4O is
recorded in

Next, a device for reproducing digital signals recorded on the disc 40 will be explained. FIG. 11 shows a block diagram of an embodiment of the digital signal reproducing device according to the present invention. In the figure, a disk 40 is placed on a turntable (not shown) and rotated synchronously at 900 rpm. As shown in FIG. 12, there is a flat surface 7 on the disk 40.
Track width TW consisting of repeated 0 and bit 71,
A main track with track pitch TP, a tracking control reference signal f pi recording sub-track consisting of a repeated flat surface 70 and bit 72, flat surface 70 and bit 7
3 is repeated, and the tracking control reference signal f
The bottom surface 74b of the reproducing needle 74 is made to slide on the surface of the disk 40.

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 portion where the permanent magnet 76 of No. 5 is fixed is again surrounded by a tracking coil 77 and a jitter correction coil 78 which are fixed to the main device. The tracking coil 77 generates a magnetic field in a direction perpendicular to the magnetic field direction of the permanent 1i1Ei76, and moves the cantilever 75 in any one direction in the track width direction according to the polarity of the tracking error signal from the tracking servo circuit 79, and Displace it at a maximum displacement depending on its size.

Resonance in which the resonant frequency changes in response to the electrostatic capacitance 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 amplitude changes according to the change in capacitance from the resonant circuit, and a circuit that applies a constant frequency to this resonant circuit; signal) in front of 1
The high-frequency reproduction signal taken out from the BIC/REP circuit 80, which consists of an amplification circuit, is supplied to the FMII adjustment circuit 81, where the main information signal of the main track (here, the digital audio signal and the time-series synthesized signal) is supplied to the FMII adjustment circuit 81. (digital video signals) are demodulated, and a portion is branched and supplied to a tracking servo circuit 79.

The tracking control circuit 79 selectively extracts -f p3 from the reproduced signal into the first to third tracking control reference signals f l)1, and outputs both reference signals (
pl, f The envelope detection output of p2 is differentially amplified to obtain l
This tracking error signal is sent to the tracking coil 7.
Output to 7. However, f pi for the main track,
Since the recording positional relationship of f p2 changes every rotation period of the disk 40, the tracking control reference signal f p
The tracking polarity is switched every rotation period of the disk 40 by the switching pulse generated based on the detection output No. 3. The tracking servo circuit 79 controls the tracking coil 77 so that when a kick instruction signal is input to the input terminal 82, the regenerator 74 is forcibly moved in the track width direction by one track e·tchi or more. to drive.

On the other hand, the II tone digital signal taken out from the FMI[m1 circuit 81 is applied to the decoder 83, where the MF
After being subjected to MID@ and made into a time-series composite signal in the signal format shown in Fig. 8, the beginning of the signal block is detected based on the synchronization signal pit 5YNC, the serial signal is converted into a parallel signal, and error detection is further 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, correction and restoration are performed as necessary to ensure that there are no errors and that the signal arrangement is returned to its original order before interleaving16.
Of the 4-bit digital signals, the 16-bit digital audio signals of each of the three channels are converted into analog audio signals by the DA converter in the decoder 83, and then sent to output terminals 84, 85 and 86, respectively. Output. In addition, the pickup control signal is sent to a predetermined circuit (not shown) for high-speed position search, etc.
Output to.

On the other hand, the digital video signal having the signal 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 is converted from the 625-line system to the 525-line system. Here, as described above, the digital video signal is related to the m-information of the scanning lines in which the scanning lines of the first field and the scanning lines of the second field are respectively selected alternately from the top of the screen, In addition, since the [-r61MODEJ 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 8-7 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. Although it is explained that
It is not necessary when playing back as an analog color video signal conforming to the 'L format. 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 the switch may be changed over depending on the preview 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 .

Further, the digital video signals sequentially and time-sequentially extracted from the decoder 83 in the 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.

However, when the synchronization signal detection circuit 89 detects the synchronization signal 20 or 25, the 5 words (
or 11 words) is configured not to be detected as a synchronization signal even if it has the same value as the synchronization signal 20 or 25. As a result, the synchronization signal 2G
, 25υ It is possible to prevent a signal of a part of the header, or even pixel data, from being erroneously detected as a synchronization signal.

The header signal detection circuit 91 discriminates each ]-code in the header signal shown in FIG. 4 and supplies it to the control circuit 90.

The control circuit 90 receives code detection signals such as a synchronization signal detection signal and a header signal, and also detects both types (with the above-mentioned two type identification codes rP and GJ) intended by the playback device user that have entered the input terminal 93 by operating an external switch or the like. A signal (category number signal) specifying several types of special images (to be identified) is supplied, and these input signals are discriminated and decoded to control the scanning line number conversion circuit 87, the switch circuit 88, the memory write controller 92, and the switching circuit. Controls the circuit 97 etc. The output digital video signal of the scanning line number conversion circuit 87, which is selectively output by the switch circuit 88, is supplied to one of the memories 94 and 95. Address signals 21a to 24a (or 2゛1.1b) shown in Figure 4
-24b) (here, since this is a device that reproduces an analog color video signal with 525 scanning lines, the address signals 23a and 24a)
(or address after scanning line number conversion designated by 23b and 24b)> are sequentially written. Also, in the memory 94.95, there are some headers H1 to H286 shown in FIG.
and the EOD signal is not written, and the video signal section v1 to V2
The memory write controller 92 is controlled so that 86 pixel data groups are written.

Normally, the memories 94 and 95 load reproduced pixel data alternately one frame or one field at a time, but in this embodiment, the memories 94 and 95 specified by the write designation code rB19WJ shown in FIG. 4 read the reproduced pixel data. Write data within the horizontal blanking period.

The memories 94 and 95 simultaneously read out the written reproduction pixel data based on the read control signal from the memory read controller and synchronization signal generation circuit 96, and also correct jitter associated with reproduction. Here, the memory 94
The digital luminance signal read out from the first
The and second digital color difference signals are each read out at a sampling frequency of 2.25 MHz and a quantization number of 8 bits, and are supplied to a 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.
The read output of the memory 4 and 95 is switched from the memory whose read output had been selected until then to the read output of the other memory. The time required for switching the switching circuit 97 is normally extremely short, but during special effects such as fade-in, the time required for switching the switching circuit 97 is
ll (for example, 1 second).

Of the three types of digital signals that passed through the switching circuit 97,
The digital luminance signal is digital-to-analog converted by the DA converter 98 and supplied to the encoder 101 as an analog tone signal.

The two types of digital color difference signals are each sent to an OA converter 99°10.
The color difference signal (B
-Y) and (RY) and are supplied to the encoder 101. The encoder 101 uses these three types of analog signals, a memory read controller, and a synchronization signal generation circuit 9.
6, a horizontal synchronization signal, a vertical synchronization signal, a color burst signal, etc. are used to generate a color video signal compliant with the Ncho SC system, and output it from a playback output terminal 102 to a color television receiver for monitoring (not shown). Here, color still images, partial moving images, etc. are displayed as auxiliary information for the listener's music appreciation of the audio signals outputted from the output terminals 84, 85, 86 and reproduced.

Next, in the case where a plurality of image information of mutually related categories are recorded on the disc 40, the operation when selectively reproducing only the image information of a desired category will be described. The user inputs into the input terminal 93 a signal specifying both types of a desired category number selected from among the various category numbers printed on the label or storage case of the disc 40, etc., and the control circuit 9. Among the two-type designation signal and the signal from the header signal detection circuit 91, the two-type identification codes rP, GJ
The video signal part to be played back only when the two match is stored in the memory 94 (or 95).
Repeat writing. As a result, the memory 94 (
or 95), only the image information of the desired category number is stored and read out to display the image of the desired category number. This image information is displayed in synchronization with the music, so if the music continues to play for a certain period of time, the next image information stored in memory 95 (or 94) will be displayed. The display can be changed instantly. In this way, only the image information of the category, □, and □ desired by the user is continuously reproduced and displayed. The selector is automatically set to the first priority category number when the digital signal reproducing device is powered on. That is, as described above, a digital video signal of a normal image is reproduced from the fourth channel, and a digital video signal of image information of a plurality of different categories is synthesized in time series and sequentially reproduced from the third channel. If a volatile memory is used in the selector, the selector is configured so that when the power is turned on, both types of designation signals that designate the digital video signal of the fourth channel are retrieved from the selector. It is configured to be set automatically. This prevents the type designation signal from becoming a random value when the power is turned on, and also automatically specifies both types of digital video signals in the fourth channel, which is considered to be played the most. However, if a nonvolatile memory is used for the selector, the circuit for automatically setting the category number to the first priority category number when the power is turned on is not necessary.

By the way, 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 Since it takes a certain amount of time to memorize the image, it is necessary to record the digital video signal for the specified period of time before the start of displaying the image. The recording start position of the digital video signal to be reproduced is recorded earlier than the latter by the above-mentioned fixed period of time.For this reason, when randomly accessing the disk 40, the reproduction total 74 is moved toward the inner circumference or outer circumference of the disk 40. The control signal in the signal format shown in FIG. 9 is played back while the signal is transferred to However, in such cases, playback may start from the middle of the digital video signal.In such cases, in the method previously proposed by the applicant, one field or one field of the image is played back.
Since the synchronization signal existed only at the beginning of the digital video signal of the frame, it was not possible to display the digital video signal that was played back from the middle of the frame.
According to this embodiment, as shown in FIG.
Since it is placed and transmitted before the digital video signal section for F1, even if it is played from the middle, the digital video signal after the first played header part can be taken into the memory 94 or 95 and displayed. can do.

Furthermore, when displaying lyrics or the like on a portion of the screen, if the image information of only that portion is transmitted in a concentrated manner, that portion can be quickly changed. In the same way, you can also play videos on a limited small screen area. That is, the 13th
A limited small screen portion 10 within the playback plane 104 shown in the figure.
6, when playing a video, address signals 21a to 241a121 specifying the address of this small screen portion 106.
The process of transmitting the pixel data following the header portion having 11 b to 24b' is repeated. In FIG. 13, 105 indicates the transmission position of a part of the header. However, this header part 105 is
As mentioned above, there are some things that are not displayed in 4. The pixel data of the small screen portion 106 is written into the memory 94 and 95 that reads the digital video signal that displays the image on the screen 104, so the written pixel data is stored as a small moving image. displayed on screen portion 106.

In the case of partial self-transmission, the transmission time varies depending on the display area, so images displayed on a small screen have a short transmission period.
It can be a video.

In the case of item F, standard self-transmission using a 625-scanning-line method was explained, but uniformity is required when transmitting high-definition, high-quality single-edge transmission, or when transmitting motion using run-length codes. The day is identified by the value of the type identification code [MO[]E1, and the transmission format is also different from that in FIG.

Also, the value of the image type identification code rMODEJ is discriminated and reproduced, and the control circuit? 0 output signal controls the scanning line number conversion circuit 87 and memory write controller 92 as necessary to select one format for loading into the memory 94.95. For example, when it is determined by the code "MODE" that a high-quality, high-definition digital video signal has been reproduced.

The memory write controller 92 is controlled so that the memory 94.95 does not capture this reproduced digital video signal (or the memory 94.95 is compressed while compressing the reproduced digital video signal so that the memory 94.95 captures the reproduced digital video signal in the necessary scan lines). 95). In addition, the number of scanning lines of the high-quality reproduced digital signal mentioned above has been changed from 1125 to 62.
The circuit operation of the scanning line number conversion circuit 87 may be changed to use a 5 line system or a 525 line system. In addition, 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 - identification code r F R
/ FT J value and signal format (in the case of 1 field transmission, the video signal part divided every 2 days is divided into 143 parts and transmitted), and the playback device uses this code [FR/FLJ]. Separately its memory 94.9
5 according to the format at that time.

Furthermore, 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 the time lag of words are not accumulated.

Note that the unit of division of the digital video signal recorded on the disk 40 by the method of the present invention is not limited to the above-mentioned embodiments, but in short, the unit of division 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. In such cases, it is sufficient that the human eye does not perceive that the color and brightness are switching separately (for example, adding a part of the header to each pixel data of a maximum of 10 scanning wheels). It may also be transmitted.

). Further, in the above embodiment, the pixel data of the divided signal is
As shown in Figure 4 (A), the explanation has been made assuming that the pixel data is of 62 adjacent scanning lines (that is, pixel data of two horizontal rows or pixel groups), but as shown in Figure 4 (B). , the pixel data may be pixel data of adjacent pixel groups in about 2 to 10 columns arranged in the vertical direction. Furthermore, the digital video signal may be transmitted for one frame or one field on a total of two channels, Ch-3 and Ch-4 shown in FIG. The digital video signals of the channels are played back in time series and transmitted over a single transmission line.

In the above embodiment, the number of scanning lines of the video signal is 625.
The signal recording format of digital audio discs such as disc 40 is common throughout the world, so that it can be played universally, and it is PALh format or SECA format.
This is to ensure that there is no shortage of information when reproducing a video signal compliant with the M format.

In the above explanation, the case where the application is applied to the disk recording method and playback device proposed earlier by the present applicant was explained, but the present invention is not limited to this, and the present invention is not limited to this, and it may be applied to a capacitance-variable reading type disk having a tracking guide groove. The present invention can also be applied to disks in which a pre-existing signal is read by a light beam. In addition, R, G,
If it has three primary color signal input terminals of B, encoder 1
A matrix circuit is used instead of 01 to convert the luminance signal Y and color difference signals (R-Y) and (B-Y) into three primary color signals @R, G, B and supply them to the above input terminals separately. By doing so, the television receiver can display extremely high quality still images. Furthermore, the color difference signals recorded on the disk 40 are (G-Y) and (
It may be a combination of (RY) or (B-Y), or it may be an I signal, Qtf6, or a three primary color signal.

As mentioned above, the digital signal reproducing device according to the present invention includes:
A time-series composite signal C of pixel data from each pixel arranged in a matrix and constituting one screen. The pixel data of a pixel group is divided into pixel data, and at least the synchronization signal and the image information coexist at the beginning and end of each divided signal. A recording medium on which a time-series composite digital video signal to which a header signal having an identification code is added is reproduced, and the header signal is discriminately reproduced from the reproduced digital video signal. When the value of the identification code matches a desired dual-type designation signal indicating a desired negative category input from the outside, the divided signal is played following the header signal having a matching dual-type identification code. The above-mentioned digital 11 degree signal and 2 are taken into the memory circuit and constitute the divided signals taken into the memory circuit.
The digital color difference signals of each species are simultaneously read out and D
After passing through the A converter, a reproduced color video signal of the standard television system is generated, so it is possible to reproduce only the desired category of image information among multiple image information of different categories. Even if the video signal is played back from the middle, the digital video signal after the first played header signal can be loaded into the memory circuit and displayed. Even if there is a deviation, the error due to time lag is small (・・). Also, it is affected by dropout <C・・ Also, since the header signal is made up of the same content being repeated multiple times (for example, twice), Even if the first header signal part is not reproduced, the pixel data can be taken into the memory circuit by reproducing the subsequent header signal part, and the digital video signal can also be recorded. Since the audio signal of sound angle information is recorded on a disk-shaped recording medium in chronological order along with the digital audio signal obtained by digital pulse modulation, it is possible to reproduce and display high-quality images as well as high-quality images. It has many features.

[Brief explanation of drawings]

FIG. 1 is a block system diagram showing an example of the main part of the recording system of the digital signal reproduced by the device of the present invention, FIG. 2 is a diagram showing the image information part to be transmitted in the video signal, and FIG. FIG. 4 is a diagram schematically showing an example of the structure of one frame of a video signal, FIG. 5 is a diagram showing an example of the signal format of the header signal in FIG. 3, and FIG. A diagram showing an example of the signal format of the same product. Figures 6 (A) and (B) are diagrams each showing an example of a method for converting the number of scanning lines from 625 to 525. Figure 7 is a diagram showing an example of the method according to the present invention. FIG. 8 is a diagram showing an example of another essential part of the recording system for the digital signal reproduced by the apparatus; FIG. 8 is a diagram showing an example of the signal format of one block of the digital signal previously proposed by the applicant; 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 of FIG. 7, and FIG. 11 is an embodiment of the digital signal reproducing device according to the present invention. FIG. 112 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 explains the screen rewriting operation in a limited small screen. Figure 14 (A), (B)
are diagrams showing the transmission order of pixel data of a digital video signal to be reproduced by the apparatus of the present invention, respectively;
,. I'1.・ 1... Video signal source, 2... TV synchronization signal generator, 3... Matrix circuit, 4, 5, 6.35...A
D converter, 9, 10, 11, 18.94.95...Memory, 15.97...Switching circuit, 17...Header signal generator, 19...Digital recorder, 20.25
...Synchronization signal, 21a ・-24a, 21b ~2
4b - Address signal, 30-32 Analog audio signal input terminal, 36 Control signal generation circuit, 37 Signal processing circuit, 39 Recording device, 40
...Disc-shaped recording medium (disk), 41...Laser light source, 42°45.47...Light modulator, 49...
Recording master, 59... Polarizing prism, 60... Half mirror 161... Prism, 74... Playback needle, 74
a...electrode, 76...permanent@stone, 79...tracking servo circuit, 80...pickup circuit, 83
...Decoder, 84-86...About log audio signal output terminal, 87...Scanning line number conversion circuit, 88...
・Switch circuit, 89...Synchronization signal detection circuit, 90・
...Control circuit, 91...Header signal detection circuit, 93
...Input terminal for both types of designated signals, etc., 98-100...D
A *i (changer, 101...encoder, 102-
7tO'j'er't""jM@tBj')*f, 10
6. I @ *Small screen area where drawing is performed, Hl, H2
. . . Header part, ■1 to V286 . . . i-video signal section, EOD . . . Signal transmission end signal (EOD signal). Patent applicant: Japan Victor Co., Ltd. Agent
Patent Attorney Tadahiko Ito'゛-; +A+ Figure 6 fBl Figure 7 d Figure 8 Figure 9 Figure 1 O Figure 13 Figure 14 Continued from page 1 (Inventor: Koji Tanaka Moriya, Kanayo Ward, Yokohama City 3-12, Japan Victor Co., Ltd., Inventor: Mitsuo Kubo, 3-12 Moriyamachi, Kanayō-ku, Yokohama City, Japan Victor Co., Ltd. (Secret inventor: Yoshiaki Amano, 3-chome Moriyamachi, Kanayō-ku, Yokohama) No. 12, within Japan Victor Co., Ltd. 0 Inventor: Hikaru Kikuchi, 3-12 Moriyacho, Kanayō-ku, Yokohama, Japan Victor Co., Ltd.: :':','1゜Procedural amendment type S/6, 1980 Patent Office Director Kazuo Wakasugi 1, Case number 1983 Patent Application No. 67817 2, Name of invention Digital signal reproducing device 3, Assistant patent applicant (1 location: Moriya, Kanayō Ward, Yokohama City, Kanagawa Prefecture, 221 Prefecture) town 3
1211-Chome - Name (432) Japan Victor Co., Ltd. Representative Director and President Shishi Sho - Department 4
, Agent address: 175-7-6 Koji, Chiyoda-ku, Tokyo 102, Japan Detailed explanation of the invention in the amended payment statement. 7. Contents of the amendment (1) In the specification, page 7, line i, "The first half J is amended to be VY j. (21f51, page 7, 10h (7) r mark 2 [11J
It is corrected as "of r41 points." ■ Correct r465j on page 24, line 9 to "456".

Claims (1)

[Claims] A digital luminance signal, which is a time-series composite signal of pixel data from each pixel that is arranged in a matrix and constitutes one screen, and two types of digital color difference signals are arranged at intervals of a fixed number of adjacent rows or columns. The pixel data of each pixel group is divided into pixel data, and each divided signal has at least a type of identification code at the beginning position thereof indicating that the synchronization signal and the image information belong to the - category among a plurality of mutually related categories. Reproducing a recording medium on which a time-series composite digital video signal to which a header signal having a header is added is recorded, discriminating and reproducing the header signal from the reproduced digital video signal, and reproducing the reproduced one-type identification code. When the value coincides with a type designation signal indicating a desired negative category inputted from the outside, the portion I is played following the header signal having the matching two-type identification code.
The IJIi signal is taken into a memory circuit, and the digital luminance signal and two types of digital color difference signals that constitute the divided signals taken into the memory circuit are read out simultaneously and passed through a DA converter. A digital signal reproducing device characterized in that it generates a reproduced color video signal using a method.