JPH065934B2 - Information signal recording disk - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information signal recording disk, and more particularly to an information signal recording disk in which at least a digital video signal accompanied by a header signal of still image information is recorded.

Conventional technology Conventionally, an audio signal or an audio signal and a video signal are
Information signal recording disks (hereinafter referred to as "disks"), which are digitally modulated and then time-sequentially synthesized and recorded as concentric circular or spiral tracks, for example, as a change in geometrical shape, are also widely known. ing. This disc is referred to as a disc audio disc because the recorded information is mainly audio signals, and the video signals are mainly still images and only serve as auxiliary information that aids the listener's imagination of the audio signals. ing. On a recording track of this digital audio disc, an information signal such as a voice signal, a still image, and character data is digitally modulated and converted into a digital signal form, and then frequency modulated.

It takes about 2.26 seconds to reproduce one screen of still picture information from the above disc. The playback device for playing this disc is provided with a video memory for two screens.
After all the still images have been written in one memory, the reading of the still images is switched from the other memory to the one memory, so that the cut screen is instantaneously rewritten. Further, while writing a still image in one of the memories, the still image is read from the one of the memories, and a wipe change is performed to gradually rewrite the display screen.

Problems to be Solved by the Invention For example, when a unified still image is projected on 16 screens, it is better to record still image information for the 16-screen multi-display on a single disc for 16 discs. It is superior to disk recording in that it is simpler in disk production and in synchronous operation of the playback device.

However, in a conventional disc, the still image information is written to either the first memory or the second memory in the header signal provided in each still image information, and at the same time, the still image information is written from either memory. The specified code that specifies whether to read is recorded. Therefore, in the conventional disc, it is possible to cut and replace any one of 16 screens, and it is possible to sequentially switch and cut 16 screens. However, it is not possible to cut all 16 screens at the same time. Due to the effects of the video software, it has been demanded that 16 screens be switched at the same time, and there is a problem that this cannot be satisfied.

Therefore, an object of the present invention is to provide an information signal recording disk that solves the above problems by recording a header signal that does not accompany still image information at a position to be reproduced after reproduction of arbitrary still image information. To do.

Means for Solving the Problems In the disc of the present invention, at least a digital video signal accompanied by a header signal of still image information is recorded. In this header signal, a write designation code that designates which memory of the at least two screens of the playback device to write the still image information and a read designation code that designates from which memory the still image information is read. And are provided. First, arbitrary still image information is recorded along with a header signal that specifies a memory in which the write designation code and the read designation code are different. At the position on the disk to be played after the reproduction of this still image information, the write designation code of the header signal accompanied by any still image information,
The read designation code has a write designation code and a read designation code that designate different memories from each other,
And the header signal without image information is recorded.

Operation In the present invention, the above-mentioned arbitrary still image information is written in the memory which has not been read at this point. When the header signal without the still image information is reproduced thereafter, the memory for reading is switched by the designated code of this header signal, the above-mentioned arbitrary still image information is read, and the displayed still image is cut and replaced. To

Embodiment FIG. 1 shows a schematic track pattern of an embodiment of the disk according to the present invention. In the figure, an audio signal and a digital video signal of a still image are frequency-modulated and recorded on the track shown by the solid line. A third tracking control reference signal f _P3 is recorded at a specific position 2 of one rotation cycle on the disk 1 for a certain period as described later. Truck t _1a
The ~t _1b digital video signal for one screen of the first screen in the 16 screen is recorded, the next track t _2a ~t _2b digital video signal of the second screen, the track t _3a t _3b first Digital video signals of three screens are recorded respectively, and thereafter, digital video signals of the sixteenth screen are similarly recorded on tracks t _16a to t _16b .

Next, a recording system for recording the disc 1 will be described with reference to FIG. In FIG. 2, a plurality of still image digital video signals are recorded in the digital recorder 4, and the digital recorder 4 reproduces the digital video signal and supplies it to the signal processing circuit 5.

Here, the digital video signal recorded in the digital recorder 4 has a signal format as shown in FIG. Digital video signal for one screen is H ₁ ~ in Figure 3
₆₈₄ header signals indicated by H ₆₈₄ , Y ₁ ,
_{Y 2, ... (R-Y} ) 1, and is configured more and _{(B-Y) 1,} component coding signal shown by ....

First, to explain the component encoded signal,
Of the color video signals for one frame having 625 scanning lines and a horizontal scanning frequency of 15.625 kHz, only the video signal in the video period has the sampling frequency of 9 MHz and the quantization number of 8 as described above.
The two color difference signals (RY) and (BY) are sampled and quantized by bits, while the sampling frequencies are 2.25 MHz.
z, the number of quantization is 8 bits and is sampled and quantized. Digital luminance signal is the number of sampling points (number of pixels) per scanning line
Is 456, and in the case of one frame, the number of effective scanning lines is 572.

The digital luminance signal and the two kinds of digital color difference signals are respectively written in a memory circuit (not shown), and the digital luminance signal has a sampling frequency of 88.2 KHz and a quantization number of 8 bits by a read control signal of a predetermined frequency. The two types of digital color difference signals read out are also sampled at a sampling frequency of 8
It is read out at 8.2 kHz and a quantization number of 8 bits and applied to a switching circuit (not shown). This switching circuit is supplied with a separately generated header signal having a sampling frequency of 44.1 kHz and a quantization number of 16 bits. The switching circuit switches these input digital signals in a predetermined order, as shown in FIG. A digital video signal for one field of the signal format is generated and recorded in the digital recorder 4 shown in FIG.

In FIG. 3, the digital video signal for one screen is
Assuming that 1 word is 16 bits, digital luminance signals Y _{1 to} Y ₄₅₆ and digital color difference signals (R−
Y) ₁ to (RY) ₁₁₄ , (BY) ₁ to (BY) ₁₁₄ ,
A total of 6916 header signals H _{1 to} H _{684 of} 6 words each of which is synthesized at the head position of each of these signals are time-sequentially synthesized into a digital signal of 101916 words in total. The 143-word digital luminance signal Y ₁ transmitted after the header signal H ₁ shown in FIG. 3 is applied to the leftmost vertical first column in the first field of the television signal scanned on the screen. Corresponding to a total of 286 pixel data groups, two pixel data are arranged in the upper 8 bits and lower 8 bits of one word. The digital luminance signal Y ₂ of 143 words transmitted next to the header signal H ₂ is the second of the television signals scanned on the screen.
A total of 286 pixel data groups in the second field corresponding to the second vertical second pixel column from the left in the field are shown. As in the above, two pixels are provided for each of the upper and lower 8 bits of one word. Data is placed. Similarly, the digital luminance signal Y ₃ next to the header signal H ₃ has a total of 286 screen data groups corresponding to the pixel row of the first field of the third vertical column on the screen, and the digital next to the header signal H _4. The luminance signal Y ₄ represents a total of 286 pieces of screen data corresponding to the pixel column of the second field of the fourth vertical column on the screen, and the digital luminance signal Y ₅ next to the header signal H ₇ is on the screen. A total of 2 corresponding to the pixel row of the first field in the vertical fifth row
86 pixel data groups are shown.

Further, (RY) ₁ next to the header signal H ₅ is, for example, the first ( _first ) vertical first column at the leftmost end of the screen of the first digital color difference signal.
A total of 286 pixel data groups corresponding to the pixel columns of the field are shown, and (BY) ₁ next to the header signal H ₆ is, for example, the first vertical column at the leftmost end of the screen of the second digital color difference signal. A total of 286 pixel data groups corresponding to the pixel columns of the first field are shown. In this way, a total of six pixel data groups of four columns of pixel data groups in the vertical direction of the digital luminance signal and one row of pixel data groups in the vertical direction of the two types of digital color difference signals are set as one unit And is recorded in the digital recorder 4 in time series.

Next, the signal format of the header signals H _{1 to} H ₆₈₄ will be described with reference to FIG. Each of the header signals H _{1 to} H ₆₈₄ consists of 6 words. In FIG. 4, the vertical direction indicates the bit arrangement, the upper side indicates the MSB (Most Significant Bit), the lower side indicates the LSV (Least Significant Bit), and the horizontal direction indicates the word as in FIG. Is. In the first word of the header signal, a 15-bit all "1" synchronizing signal indicated by SYNC and a transmission channel code indicated by "1P / ▲ ▼" in LSB 1 bit are arranged. The high-order 2 bits of the second word are the image type identification code indicated by "MODE", the high-order 3rd to 5th bits are the special effect code "SE", and the next 3 bits are the image type. The identification code "P.
G ”, 9th bit“ 1 ”is a binary number“ 1 ”, 10th
The bit number is the image information amount identification code, the 11th bit is the screen transmission identification code, the 12th bit is the write designation code "B19W", the 13th bit is the read designation code "B19R", and the 14th to 16th bits. Bit eye (L
The total 3 bits up to SB) are the memory column discrimination code "B2-
B0 ".

Address codes “B3 to B1” of the upper 8 bits AD1a of the third word and the upper 8 bits AD2a of the fourth word
8 "indicates the address of the memory in which the upper 8-bit pixel data of the first word of the video signal section in the system of 625 scanning lines is stored, and the lower 8-bits AD1b and AD2b of the third and fourth words are stored. The address code "B3 to B18" indicates the memory address in the 525 scanning line system. Also, the 5th and 6th words of the header signal are 2 words for backup,
Normally, all are "0".

1-bit transmission channel code 1P / ▲ ▼
And a 3-bit image type identification code P.P. A total of 4 bits of G are used as a screen identification code, and the addressing of 16 reproducing devices for displaying each of the 1st screen to the 16th screen is performed by these 4 bits.

The write designation code “B19W” is for designating the writing of two memories in one playback device, which will be described later, and is the first (or second) when the value is “0” (or “1”).
To write the pixel data of the digital video signal in the memory. In addition, the read designation code "B19
“R” specifies reading of the above two memories, and when the value is “0” (or “1”), it is the first (or second)
To read the pixel data from the memory.

Returning to FIG. 2, the input terminals 6 and 7 each have 2
Channel analog audio signals come in separately,
A start signal is input to the input terminal 8 and a cue signal is input to the input terminal 9 every time the music program of the analog audio signal is switched from the existing music program to another music program. In the disk 1 described later, the sampling frequency is 44.1 kHz as the information amount for one channel,
Assuming that a digital signal with a quantization number of 16 bits is recorded in time series on one track for four channels, the above-mentioned two-channel analog audio signal is sampled by the AD converter 10 at each sampling frequency of 44.1 KHz.
Is converted into a digital audio signal (PCM audio signal) having a quantization number of 16 bits and supplied to the signal processing circuit 5. Further, the control signal generated by the control signal generation circuit 11 is supplied to the signal processing circuit 5. The control signal is used for position control (random access) of the pickup reproducing element.

The signal processing circuit 5 receives the digital video signal from the digital recorder 4 in the signal format as shown in FIG.
The 2-channel digital audio signal and the control signal are respectively supplied from the AD converter 10, and parallel data are rearranged into serial data, and the digital signal of each channel is divided into predetermined sections. At the same time, they are interleaved and time division multiplexed. Then, an error code correction signal, an error code detection signal, and a sync signal bit indicating the beginning of a block (frame) are added to generate a recording signal.

FIG. 5 is a diagram schematically showing an example of one block (frame) in the recording signal generated as a result of the signal processing of the signal processing circuit 5, and one block is composed of 130 bits. SYNC indicates the multiplexing position of the 8-bit fixed pattern synchronization signal indicating the beginning of the block, and Ch-1, Ch-
Reference numeral 2 indicates the digital audio signals of the above two channels, and Ch-3 and Ch-4 indicate the multiplexing positions of 16 bits and one word of the above digital video signals of the two channels. Further, P and Q shown in FIG. 6 are 16-bit error code correction signals, respectively. Further, CRC is a 23-bit error code detection signal, Adr is a control signal used for random access, and U is a user's bit. Fifth
A block of signals is composed of a total of 130 bits from SYNC to U shown in the figure, and the digital signal is, for example, the sampling frequency of the digital audio signal in block units.
The signals are combined at the same frequency as 44.1 kHz, transmitted in time series, and recorded on the disk 1 through the modulation circuit 12 and the recording device 13 using a laser beam.

The disc 1 is a pit train in which a frequency-modulated wave of a signal obtained by time-sequentially synthesizing a disc audio signal and a digital video signal forming one block in the signal format shown in FIG. The recorded spiral-shaped main track and the track-center lines of adjacent main tracks, which are located approximately in the middle between the track centerlines, are alternately located in a band lower than the band of the frequency-modulated wave every disk rotation cycle. A sub-track recorded by a pit train in which burst-type first and second tracking control reference signals f _P1 and f _{P2 of} one frequency are intermittently formed, and a switching connection part of f _P1 and f _P2 The third tracking control reference signal f _P3 is recorded on the main track of the. In addition, this disk 1 has no guide groove for tracking a reproducing needle and has an electrode function.

Further, as to the disc 1 shown in the first figure, in the tracks t _{1a to} t _1b , the digital video signal of the still image A ₁ displayed on the first screen of the image A composed of 16 screens is recorded. Similarly, digital video signals of still images A _{2 to} A ₁₆ displayed on the second to 16th screens of the image A are recorded on the tracks t _2a to t _16b , respectively. The screen identification code (that is, code 1P /) of the header signal of the tracks t _{1a to} t _1b and the code “P.
G ”) is“ 0000 ”, which indicates the first playback device for displaying the first screen, the write designation code“ B19W ”is set to“ 1 ”, and the read designation code“ B ”.
"19R" is set to "0". 2nd screen in the same way
The screen identification codes of the header signals corresponding to the still images of the 16th screens are set to "0001" to "1111", respectively, to instruct the second reproduction device to the 16th reproduction device,
Each write designation code “B19W” is set to “1”, and each read designation code “B19R” is set to “0”.
It is said that.

In addition, the track t _16b in which the still image of the 16th screen is recorded
Sixteen header signals without component-encoded data are continuously recorded in the track t ₁₇ following the. The screen identification codes of the ₁₆ header signals h _{1 to} h ₁₆ are set to “0000” to “1111”, respectively, and
Playback device to the sixteenth playback device. Further, the write designation code “B19W” of each of these header signals is set to “0”, and the read designation code “B19R” of each of them is set to “1”.

In this embodiment, the first screen still image is recorded on the tracks t _{1a to} t _1b and the second screen still image is recorded on the tracks t _{2a to} t _2b for the sake of convenience. _It is not necessary to match the switching point of the track, which is one disk rotation period starting from the _P3 recording position.

Next, an example of the first reproducing apparatus for reproducing the disc of the present invention will be described with reference to FIG. In the figure, the disk 1 is rotated at a predetermined number of rotations, and a scanning needle 29 called a sensor is slid and scanned. By detecting a change in capacitance between the scanning needle 29, the electrode, and the pit row recorded on the disk 1, the recorded signal is transferred to the pickup circuit 3 by a known method.
It is reproduced and output by 0. The output reproduction signal of the pickup circuit 30 is demodulated by the FM demodulator 31, and the demodulated digital signal extracted here is supplied to the decoder 33 and is also supplied from the terminal 32 to the decoders of the second to sixteenth reproduction devices. . The decoder 33 uses the demodulated digital signal as a time-series composite signal composed of a sync signal bit SYNC, a two-channel digital audio signal, a two-channel digital video signal, an error code correction signal, and the like. Thereafter, the beginning of the signal block is detected based on the synchronization signal bit SYNC, 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 signal. In this way, the digital signals of the two channels of the four-channel digital signals which have been corrected and restored as necessary and have no error, and which have been restored to the original order before the signal arrangement was interleaved. The audio signal is converted into an analog audio signal by the DA converter in the decoder 33 and then output to the output terminals 34 and 35, respectively. On the other hand, the digital video signals of the two channels are reproduced in time series, and are combined into a predetermined signal format in which a header signal is added to each pixel data group in one vertical column on the screen, and the scanning line number conversion circuit 36 is provided. It is supplied and converted into a system of 525 scanning lines. The output pixel data of the scanning line conversion circuit 36 is supplied to the first or second frame memory (hereinafter simply referred to as “memory”) 43 or 44 which is a main part of the device of the present invention by the switch circuit 37.

Further, the digital video signals sequentially taken out in time series from the decoder 33 are also supplied to the synchronization signal detection circuit 38, the header signal detection circuit 40, and the memory write controller 41, respectively. The synchronization signal detection circuit 38 detects the synchronization signal in the header signal and outputs the detection signal to the control circuit 39.
Supply to. Further, the header signal detection circuit 40 discriminates and reproduces each code and address signal other than the synchronization signal in the header signal and supplies them to the control circuit 39.

The control circuit 39 is supplied with the sync signal detection signal and each code detection signal of the header signal, discriminates and decodes these input signals, and the screen identification code designating the first reproducing device is set to "0000". The scanning line number conversion circuit 36, the switch circuit 37, the memory write controller 41, the memory read controller and synchronization signal generation circuit 45, the switching circuit 46, etc. are controlled according to each code of the header signal. The memory write controller 41 causes the pixel data in the digital video signal supplied to the memory 43 or 44 to be written at a predetermined address based on the address signal in the header signal. The switch circuit 37 selects the terminal a when the value of the code "B19W" is "0" and the terminal "a" when the value of the code "B19W" is "1" by the control signal from the control circuit 39 based on the memory write designation code "B19W" in the header signal. It is switched to select terminal b. As a result, the code "B1
Pixel data is supplied and written to the first memory 43 or the second memory 44 designated by "9 W". Memory 4
Reference numerals 3 and 44 read the pixel data for one frame based on the read control signal from the memory read controller and the sync signal generation circuit 45, and at the same time, correct the jitter due to the reproduction. The pixel data read from each of the memories 43 and 44 is supplied to the switching circuit 46.

The switching circuit 46 takes out the output pixel data of the memory 43 when the value of the code "B19R" is "0" according to the control signal from the control circuit 39 based on the memory read designation code "B19R" in the header signal, and outputs "1". At this time, switching is performed so as to retrieve the output pixel data of the memory 44,
The extracted pixel data is supplied to the D / A converter 47.
The analog video signal obtained by D / A conversion in the D / A converter 47 is supplied to the encoder 48. The analog video signal is added with horizontal and vertical synchronizing signals supplied from the memory read controller and the synchronizing signal generating circuit 45 to be a television signal of the standard television system and output from the output terminal 49.

Each of the remaining second to sixteenth reproducing apparatuses has the same configuration as the first reproducing apparatus shown in FIG. 6, and the terminal 32 of the first reproducing apparatus is provided.
The demodulated digital signals output from the above are supplied to the respective decoders, and operate in the same manner as the device shown in FIG. However, the control circuit of each reproducing device controls according to each code of the header signal having the screen identification code of the value that specifies each reproducing device.

As a result, when the disc 1 shown in FIG. 1 is reproduced,
Still image _{A 1, A 2, A 3} , ..., the digital video signal of the A _16, the header signal _h 1 without component coding data continuously _{to, h 2, h 3, ...} , h 16 is the seventh
It is obtained in the order shown in FIG. Write designation code "B
19W "is, as shown in FIG. 7 (B), tracks t _{1a to} t
_Since it is "1" in _16b , the pixel data of each of the still images A _{1 to} A ₁₆ is written in the second memory of the first to sixteenth playback devices according to the screen identification code shown in FIG. 7 (D). Be done.
Here, looking at the first reproducing apparatus, the still image X ₁ previously written in the memory 43 as shown in FIG.
The pixel data of the still image B ₁ is stored, and when the still image B ₁ reproduced following the header signal h ₁₆ specifies the memory 43, the pixel data of the still image B ₁ is written. As shown in FIG. 7F, the memory 44 is written with the pixel data of the still image A ₁ . In addition, the read designation code "B
19R "are tracks t _{1a to} t as shown in FIG. 7 (C).
Is "0" at _16b, to become a "1" in track t ₁₇ after the display image displayed on the first screen to 16th screen when the header signal h ₁ to h ₁₆ of the track t ₁₇ is reproduced As shown in FIG. 7 (G), the still image X that has been displayed until then is cut and switched to the still image A instantly. The time required to reproduce the above header signals h _{1 to} h ₁₆ is extremely short, and it is recognized by the human eye that the first screen to the 16th screen are switched at the same time. Of course, 1
It is also possible to cut several screens out of six at the same time.

Even in a disc in which a digital track on which the above digital audio signal is recorded and an analog recording track on which a modulated wave signal obtained by modulating a carrier wave with an analog information signal such as a composite video signal is recorded are mixed, The code "B19W" is "1" for the digital video signal of the still image (i) to be displayed after reproduction of the analog track on the digital track preceding the analog track.
The code "B19R" is recorded together with the header signal of "0", and the code "B19W" is "0" and the code "B19R" is "1" at the beginning of the next digital track continuously reproduced on this analog track. By recording a single header signal without the component coded data of "," it is possible to reproduce the digital track next to the analog track and simultaneously display the still image (i). This makes it possible to display different still images before and after the analog track, which facilitates the production of video software.

Also, in place of the analog track, a digital audio disc, which is a digital track but is recorded with other information such as a computer program or compressed voice or characters instead of still image information, is processed in the same manner as above. Of course, different still images can be displayed before and after.

EFFECTS OF THE INVENTION As described above, the information signal recording disk according to the present invention can cut the displayed still image at the time of reproducing the header signal without the still image information. When displaying still images, it is possible to cut and switch the above multiple screens at the same time.
Even if a disc containing digital tracks and analog tracks or a disc containing still image information and other information such as a computer program, separate still images can be displayed before and after the analog tracks or other information. It has features such as easy manufacturing.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic track pattern of an embodiment of the present invention, FIG. 2 is a block system diagram of an example of a recording system for recording a disc of the present invention, and FIG. 3 is a signal format of an example of a digital video signal. FIG. 4 is a diagram showing an example of a signal format of a header signal, FIG. 5 is a diagram showing an example of a signal format of a signal of one block recorded on a digital recording track of a disc, and FIG. 6 is a reproducing apparatus. FIG. 7 is a schematic block system diagram of one example, and FIG. 7 is a diagram for explaining a reproduction state of the disc shown in FIG. 1 ... Information signal recording disk (disc), 4 ... Digital recorder, 5 ... Signal processing circuit, 39 ... Control circuit, 40 ... Header signal detection circuit, 1P / ▲ ▼, P. G ... Screen identification code, B19W ... Writing designation code, B19R ...
Read designation code.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Mitsuo Kubo, 3-12 Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa, Japan Victor Company of Japan, Ltd. (72) Ichiro Ando, 3-12 Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa Address within Victor Company of Japan (56) Reference JP-A-60-41891 (JP, A) JP-A-58-170179 (JP, A)

Claims (1)

[Claims] 1. A still picture information is recorded at least a digital video signal accompanied with a header signal, and the still picture information is written in which memory of at least two screen memories of a reproducing device. In the information signal recording disk provided with a write designation code for designating whether to read the still image information and a read designation code for designating from which memory the still image information is to be read, arbitrary still image information is written as the write designation code and the read designation code. Recording is performed along with a header signal designating a different memory, and a write designation code and a read designation code of a header signal accompanied by the arbitrary still image information are reproduced at positions reproduced after the reproduction of the arbitrary still image information. Have a write designation code and a read designation code that specify different memories and do not carry image information. Information signal recording disc, characterized by recording a header signal.