JPS6261483A - Information signal recording disk - Google Patents

Abstract

PURPOSE:To prevent uneasy feeling from being given to a viewer by recording the still part picture information on the first part of a digital recording track succeeding to an analog recording track. CONSTITUTION:During reproducing analog recording tracks t1-t5 in a disk 1, the output signal of a video disk demodulating circuit 22 is supplied to a monitor 26, a moving picture is displayed and a sound attending thereto is generated. Thereafter, when a digital recording track t6 is reproduced, a switch circuit 25 selects a decoder 23 and all of digital recording tracks t6-t11 are reproduced. On a CRT27 of the monitor 25, a part of a still picture is displayed on a part 28 indicated by, for instance, biases. A part of the still picture corresponds to the contents of the sound generated from the monitor. Thereby, an uneasy feeling is not given to a viewer.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to information signal recording disks, and in particular to information signal recording disks, in particular those in which analog recording tracks and digital recording tracks are mixedly recorded.
It concerns the information signal recording disc that was created.

2. Description of the Related Art Conventionally, analog information signals such as composite video signals and audio signals are subjected to frequency modulation (FM) and recorded on concentric or spiral tracks as, for example, changes in geometric shapes. (referred to as a "disk"). This disc is called a video disc because the recorded information is mainly a composite video signal, and the recording track contains a modulated wave signal obtained by performing analog modulation, in which a carrier wave is modulated with an analog information signal. Composite video signals, etc. are recorded. Note that a video disc may contain, for example, a composite video signal! An address signal for random access, etc. is recorded in a specific interval within the straight line erasure period, and the address signal is a coded digital signal, but the main body of the recorded information is an analog modulated composite. Since the signal is a video signal or the like, a track such as the recording track of this video disc will hereinafter be referred to as an "analog recording track" for convenience in this specification.

On the other hand, discs in which an audio signal or an audio signal and a video signal are each digitally modulated and then synthesized in a time-series manner and recorded on concentric or spiral tracks as, for example, changes in geometric shape, have also been conventionally used. widely known. This disc is called a digital audio disc because the recorded information is mainly an audio signal, and the video signal is mainly a still image and serves only as auxiliary information to help the imagination of the listener of the audio signal. ing. In the recording track of this single digital audio disk, information signals such as audio signals and still image two-character data are digitally modulated and converted into a digital signal form by frequency modulation, etc., and are recorded thereon. In Honkawa I, a track such as the recording track of this digital audio disk will be referred to as a "digital recording track" for convenience.

By the way, in contrast to video discs, the recorded signals on the digital audio discs mentioned above are digital signals, and the audio signals are reproduced with extremely high fidelity over a wide dynamic range from the digital signal transmission system, and still images are reproduced with extremely high fidelity. It also has the advantage that the audio signal is reproduced in ultra-high fidelity together with the still image reproduction image. On the other hand, when playing still images, video discs generally mute the audio signal in order to play the same track over and over again. However, due to analog signal transmission, for example, 30
It is possible to obtain as many as 54,000 still images compared to 00 still images, and it is also possible to transmit information signals in a band of several MHz in real time. Compared to digital audio discs that transmit information signals in a band of around kHz, this has the advantage that moving images can be played back together with audio signals. Therefore, in order to optimally reproduce recorded information, it is desirable to select and record either a digital signal or an analog signal depending on the information content.

In particular, disks are attracting attention as image files for various purposes such as entertainment, education, and sales promotion because of their storage capacity for large amounts of information and the ease and speed of retrieval thereof, and are widely used in sales promotion systems.

In order to establish an attractive system that meets the demands for diversifying performance and capabilities, a variety of combinations of moving images, still images, audio, F-9, etc. are required as software.

By the way, as proposed by the present applicant, the above-mentioned video disc is capable of reproducing recorded signals by detecting changes in capacitance formed between the scanning side electrode called a sensor and the disc. Tracking control reference signals of different frequencies are recorded on both sides of the information signal recording rack (analog recording track), and tracking control is performed by comparing the reference signal levels at the time of re-1. A video disk is known that eliminates the need for a needle guide groove. On the other hand, in the digital audio disc described above, as proposed by the present applicant, the reference signal for tracking control is transferred to the information signal recording track (digital recording track) in the same way as the capacitance change reading type video disc described above. Recorded on both sides of,!
It is known that there are 11 digital audio disks with no guide groove for r# capacity change reading. This digital audio disc is rotated at the same number of revolutions as the above-mentioned capacitance change reading type video disc, and the frequency of the reference signal for tracking control and the method of reproduction are the same, and the capacitance reading type video disc is the same. They are also the same in that they have a configuration in which the kite recording signal is read by detecting a change in . Therefore, even when this digital audio disc is played back by a video disc playback device, the scanning stylus is caused to perform normal tracking operation in the same way as when replaying a video disc, and previously recorded signals cannot be picked up from the scanning stylus. By supplying the reproduced signal to the adapter, the original audio signal etc. can be demodulated.

Therefore, the present applicant has proposed, in Japanese Unexamined Patent Publication No. 59-2074033 (Japanese Patent Application No. 58-83232), etc., by recording and forming analog recording tracks and digital recording tracks in a mixed manner depending on the recorded information content. We have proposed an information signal recording disk that can maximize the respective advantages of the above-mentioned video disk and digital audio disk, and that can be reproduced in a complete sense.

Problems to be Solved by the Invention However, when reproducing a disc recorded with a mixture of conventional analog recording tracks and digital recording tracks, the image quality may change when shifting from reproduction of analog recording tracks to reproduction of digital recording tracks. A blank period occurs. This is because it takes approximately 2.26 seconds to reproduce one screen worth of still image information on a digital recording track. Conventionally, during the blank period, the output video signal is muted, or a video signal is generated and output from images stored in advance in a built-in video memory. Therefore, approximately 2.2 seconds after the start of playback of the digital recording track.
There is a problem in that no image is displayed for 6 seconds, or even if an image is displayed, the display screen has nothing to do with the re-F audio signal, giving the viewer a sense of discomfort.

SUMMARY OF THE INVENTION An object of the present invention is to provide an information signal recording disk that solves the above problems by recording still partial image information in the first portion of a digital recording track.

Means for Solving the Problems In the present invention, 511! for recording information signals is provided. Analog recording tracks and digital recording tracks are recorded on the (disc) in a mixed manner. The first part of the digital recording track following the analog recording track has video information content of a video signal representing a portion of a still image.

In the present invention, a portion of the still image is displayed in a short time after the reproduction is switched from the analog recording track to the digital recording track. Furthermore, a sound corresponding to the content of a portion of this still image is produced, so that the viewer does not feel uncomfortable.

Embodiment FIG. 1 shows a schematic track pattern of an embodiment of a disk according to the present invention. In the figure, tracks t1 to 1 indicated by solid lines
t5 is a rack for analog recording 1, and tracks t6 to ti indicated by broken lines and track t1 indicated by a dashed line
2 to t+6... are digital recording tracks.

Composite video signals, audio signals, and address signals are frequency-modulated and recorded in analog recording tracks t1 to t5, and digital data of a portion of a still image and an audio signal are frequency-modulated and recorded in digital recording tracks t6 to jn. and is recorded on digital recording track t 1
2 to t+6..., an audio signal and digital data of a still image for one screen are frequency modulated and recorded. As mentioned above, the third tracking control signal fρ3 is recorded for a certain period of time at a specific position 2 of one rotation period on the disk 1. 2a is a switching recording position between an analog recording track and a digital recording track.

Next, a recording system for recording and forming the above-mentioned disc 1 will be described. FIG. 2 shows a block system diagram of an example of this recording system. In the figure, VTR4 separately PCs the two channels of audio signals at a sampling frequency of 44.056 kHz.
A signal consisting of, for example, digital data with quantization bits of 16 bits per sample point obtained by M modulation (pulse code modulation), an error check code, and an error correction code is used as a signal of the image period of a composite video signal. A signal in the form of a composite synchronization signal is frequency modulated to reproduce the magnetic tape previously recorded on the inclined track. On the other hand, V.T.
For example, R5 has a sampling frequency of 9 Htlz for the luminance signal.

Each of the two types of color difference signals is sampled at a sampling frequency of 2.25 MH1.
A two-channel still image signal, which is component 1-encoded pixel data quantized with 8 bits per pixel, is frequency modulated and reproduced from a magnetic tape prerecorded on an inclined track. The VTRs 4 and 5 are each operated synchronously based on a synchronizing signal from a synchronizing signal generator (S5G) 6, and each of the two reproduced t? The channel reproduction signal is frequency demodulated and supplied to digital processors 7 and 8, respectively.

The digital processors 7 and 8 have a frequency [! The digital processor 7 corrects any errors in the reproduced digital data or reproduced component encoded data of the video period using the reproduced error check code and error correction code. Child bit number 16
A two-channel digital audio signal with a sampling frequency of 44.056 kHz in bits is supplied to a digital recording track encoder 9, and a digital processor 8
extracts two channels of pixel data each having an R conversion bit count of 8 bits at a sampling frequency of 88.112kllZ and supplies it to the digital recording track encoder 9 in a signal format as shown in FIG. 3(A).

In FIG. 3(A), pixel data is digital luminance signals Y1 to Y4 in units of 1 word and 16 bits.

Digital color difference signal (R-Y)+, (B-Y)
One unit is a data group in which six words of the header signal T1+"Ha at the head position of each of these signals are synthesized in a time-series manner.The digital luminance signal consists of one scanning line. If the number of pixels per frame is 456 and the number of effective scanning lines for one frame is 572, then digital l!1irt1
Signal Y+~Y4, digital color difference signal (R-Y)+,
(B-Y)+ each constitutes 143 words to form the pixel data of 4 columns in the vertical direction of one screen, and the signal format of FIG. Configure pixel data.

The header signals H1 to H16 have a signal format as shown in FIG. 3(R). In FIG. 3(B), the vertical direction shows the bit arrangement, the upper side shows the MSB (Most Significant Bit), the lower side shows the LSB (Least Significant Pit), and the horizontal direction shows the word. This is the same as in Figure (A). The first word of the header signal contains 15 bits all ``1'' indicating 5YNCt'.
” synchronization signal and a transmission channel identification code indicated by IP/2P is placed in the LSB1 bit. This code is
This is a code that identifies which channel out of the four transmission channels indicated in U, the pixel data is transmitted. is used to indicate that one screen of pixel data is transmitted, and when it is 10'', 2P is transmitted.
In other words, it indicates that one screen of pixel data is transmitted using either the third channel or the fourth channel. Various identification codes are transmitted to the second word. First, the upper 4 bits are [MODEJ
An image type identification code indicated by η is arranged.

This code determines whether the pixel data to be recorded is a standard still 1 image, a moving image using a run-length code, or a high-definition, high-quality still+1 image such as a tree with 1125 scanning lines. This is a code that indicates whether the Next, the 2nd pin 1- of the upper 5th and 6th bits has rS, EJ
A special effect practical code indicated by is arranged to identify the static image displayed on both sides when it is displayed with special effects such as fading in, changing the screen from the top or left side of the screen, etc. This is the code for. The above special effect practical code rs, the next 2 bits of EJ are both types identification code r
P, GJ are placed, and this code is the 4th channel and 3rd channel t! When transmitting pixel data independently using two channels of a channel, for example, the 4117th channel transmits both normal image data, and the third channel transmits pixel data of several types of images. Assuming that the 3rd channel transmits special images synthesized in a time-series manner, the value of the category number assigned to each of several types of images transmitted in this third channel will be shown.

“1” in the upper 9th bit of the second word is “1” in binary
, and the values of each extraction code of this second word are all l[
This is provided to prevent all 16 pits of the second word from becoming all "0" when the number J is reached. The 10th bit rFR/FIJ is an image information h1 identification code, which identifies whether the pixel data to be transmitted is for one frame or one field. ” is one frame long, and rO
When it is J, it indicates that it is one field. The signal format of pixel data differs depending on whether the pixel data is transmitted in units of one frame or in units of one field, so the playback device detects this and follows the signal format at that time. The captured image signal is captured. In addition, a screen transmission identification code indicated by 1'A/PJ is placed in the next pit after this image information identification code, and when the value is "1", the pixel data of a still image to be displayed on the entire screen is displayed. When the value is 01, it is displayed on a part of the screen, indicating that pixel data to be replaced with so-called part v1 is transmitted. 12th bit, 13th bit lB1
Each 1-bit code indicated by 9WJ and rB19RJ is a write designation code and a read designation code for the memory in the playback device, which will be described later. A total of 3 bits from the 14th bit to the 16th bit (LS8) contain rB2 to BOJ.
A memory column identification code shown in is placed. This discrimination code determines which area fI of the six memory areas in the decoder 23, to be described later, the pixel data transmitted immediately after the header signal is stored in! 1. Note that the pixel data of the digital color difference signal is accumulated in the first to fourth areas of the memory, the pixel data of the first digital color difference signal (R-Y) is accumulated in the fifth area, and the pixel data of the first digital color difference signal (R-Y) is accumulated in the fifth area. pixel data of the second digital color difference signal (RY) is accumulated.

83 to B10 of the upper 8 bits ΔD1a of the third word.
The lower 8 bits AD1b 83-B10, and the 4th word upper 8 bits 802a 811-818. The lower 8 bits 811 to 818 of AD2b are the first of the upper 8 bits of the first word transmitted following this header signal.
The 16-bit address code of the memory in which the pixel data of is to be stored is shown. Note that 83 to 810 indicate the lower bytes of the address code, and 811 to 818 indicate the upper bytes of the address code. Here, the number of scanning lines of color television signals in the world is 625 or 525, and a digital video signal is actually a time-series composite signal of pixel data of 572 scanning lines containing image information. Since the data is transmitted using a 625-scanning-line method, when reproducing using a 525-scanning-line method, the number of scanning lines is converted in the decoder 23, and then the data is stored in a meter. Therefore, this memory address signal can be used for a system with 625 scanning lines or for a system with 52 scanning lines.
A total of two address values, different values for the five-wire system, are required. Therefore, the address code "83 to 818" on the upper byte side indicated by ADla and AD2a is 6.
The 16-bit address codes 83 to 818 arranged in the lower 8 bits of ADlb and AD2b are the address values of the upper 8 bits of the first word of the first word of the video signal section in the 25-line system. The address value of the pixel data when the pixel data of the upper 8 bits of one word is converted to a system with 525 scanning lines is shown. Further, the fifth and sixth words of the header signal are two spare words and are normally all "0".

The above digital recording track encoder 9 is 5SG.
Under the control of the output signal of 6, one block of signals in the signal format shown in Fig. 4 is generated, and these are synthesized in time series at a transmission frequency of 44.056 kHz in units of blocks (frames). Furthermore, a first FM signal obtained by frequency modulating a carrier wave of, for example, about 7 MHz with this synthesized digital signal is supplied to the terminal 10a of the switch circuit 10.

Here, in one block of signals shown in FIG. 4, S indicates the start of the block, TJ indicates the arrangement position of the 8-bit fixed pattern synchronization signal, T, Ch-1° Ch-2, Ch-
3 and Ch-4 respectively indicate the arrangement position of one word of the 16-bit digital signal (that is, the digital audio A signal and the component encoded data) of each channel among the four channels.

Further, P and Q shown in FIG. 4 are 16-bit π correction codes. Furthermore, CRC is a 23-bit error detection code, and is a 23-bit error detection code for channels ch-1 to ch-4, P, and
Let each word of Q be, for example, X'' (-XS +X4 +x
+1 i [lrl when divided by the polynomial 23
It is the bit remainder, and if the signal from the 9th bit to the 121st bit of the same block is divided by the binary generator polynomial, and the resulting remainder is zero, it is assumed that there is no error. used for detection. Furthermore, the fourth
In the figure, Adr indicates a 1-bit multiplexing position of various 1 and II part signals @ (address signals) used for random access and the like. This υtill signal disperses each pit data and transmits one bit in one block, for example, 19 bits.
All the pits of the υItll signal are transmitted by 6 blocks (that is, the control signal consists of 196 bits).

).

Furthermore, U is two reserved bits called user's bits. Therefore, one block of signals is composed of a total of 130 bits from S to () shown in FIG.
The signals are synthesized at a frequency of Hz and transmitted in time series.

Returning to FIG. 2, the above-mentioned composite video signal is recorded on the inclined track of the recorded magnetic tape (master tape) to be played back by the VTR 11, and the time code track is recorded with, for example, the U.S. SMPTE
(Society of Motion picture
and Te1evision Engineering
rs) standard time code is recorded. The first time code played from this time code track and the second time code played from the same time code track by the VTR 4 are largely synchronized by a synchronizer 12.
It is converted into a signal that controls the running of the master tape of the VTRII so that the same time code is played back.

As a result, the VTR 11 is synchronized with the VTRs 4 and 5. In addition, the composite color video signal and the 2-tunnel audio signal reproduced from the inclined track of the master tape by the VTR 11 are sent to the analog recording track encoder 1.
3.

This encoder 13 was originally owned by the applicant, who owned 1[158-
Since it is well known as disclosed in Japanese Patent Application No. 23998 (Japanese Patent Application No. 52-25262), a detailed explanation thereof will be omitted. The chrominance signal is converted to the high frequency region of the luminance signal, and then the band t11! Generate a composite color video signal by performing band sharing multiplexing on a luminance signal with a limited luminance of υ1,
On the other hand, after frequency modulating the audio signal (2 channels),
Frequency iJ,'l is multiplexed onto the above composite color image 2). Further, the encoder 13 generates an address signal and multiplexes it within each specific 1H period within the vertical blanking period of the above-mentioned composite color video signal. A predetermined carrier wave is frequency-modulated using the obtained signal to generate a second FM signal, which is supplied to the terminal 10b of the switch circuit 10.

A central processing unit (CPU) 14 controls switching of the switch circuit 10. The CPU 14 is supplied with the time code reproduced by the VT'R4, while the 5SG6
1 - racking signal generator 15
A third reference signal fP3 that has been R1 is supplied together with first and second tracking control reference signals (hereinafter referred to as reference signals) fp+ and fp2, which will be described later, and a predetermined time code value to be switched is input. , and controls switching of the switch circuit 10 when the reference signal fP3 is input.

Incidentally, when the switch circuit 10 is switched from a state in which the terminal 10b is selected to a state in which the terminal 10a is selected, the VTR 5 reproduces component encoded pixel data of a portion of a still image and supplies it to the digital processor 8. At the same time, the digital recorder + J8 is shown in Figure 3 (
Partial rewriting is instructed by setting the value of the screen transmission identification code Δ/P of each of the header signals H1 to H6 shown in B) as rOJ. - After reproducing the pixel data of a part of the still image above, VT
R5 sequentially reproduces the component encoded pixel data of a still image for one screen and supplies it to the digital processor 8. At the same time, the digital broadcaster 8 outputs the screen transmission identification code A/P of each of the header signals H1 to H16. The value of r
Instruct full-screen transmission as lJ.

In this way, the second FM signal (li) from the encoder 13 selectively outputted by the switch circuit 10 and the first FM signal from the encoder 9 following this are sent to the recording circuit 16.
supplied to The recording machine 16 is a known cutting machine using a laser beam, and the recording machine 16 is a known cutting machine using a laser beam.
(A is supplied as the first input signal, and the first reference signal 1 is alternately switched by being switched every four field periods, for example, equal to one rotation period of the disc-shaped recording master 17. 'p+ and the second reference signal fP2 are supplied from the tracking signal generator 15 as second input signals,
Furthermore, the recording source corresponds to the switching position of t'p, l fP2!
The third reference signal fP generated every rotation period of 117
3 is provided as the third input signal. The recording device 16 modulates the laser beam with a signal obtained by frequency division multiplexing the first and third input signals, and modulates the laser beam with the second input signal. The second modulated laser beam obtained by modulating the laser beam is simultaneously focused and irradiated onto the photosensitive agent coated on the disc-shaped recording master 17 at a distance of about 1/2 track pitch. By subjecting this recording master disk 17 to an appropriate size through a known development process and a first disk process, a disk 1 having an electrode function and a track pattern as shown in FIG. 1 in which no needle guide groove is formed is manufactured. .

Although the recording tracks of the reference signals fPl and fP2 are not shown in FIG. 1, they are recorded between the center lines of adjacent analog recording tracks and digital recording tracks, and are recorded on the disc 1. The data is switched and recorded alternately every rotation. In addition, analog recording tracks t1 to t5
The recording position of the reference signal fP3 in is recorded for a period approximately corresponding to the vertical synchronizing signal of the four-field cycle of the composite video signal.

Furthermore, as mentioned above, the address signal indicates the number of tracks in one rotation period starting from the bfP3 recording position, and the information content is regardless of whether it is a digital recording track or an analog recording track. Continuous.

Next, an example of a replay device for reproducing the disc of the present invention will be explained with reference to FIG. 5. In the figure, a disk 1 is rotated at a predetermined number of rotations, and a scanning needle 20 called a sensor slides and scans. By detecting the change in capacitance W between the electrode of the scanning needle 20 and the pit row recorded on the disc 1, the recorded signal is reproduced and outputted by the pickup circuit 21 using a known method, and is output to the video disc demodulation circuit 22. and the decoder 23, respectively. Video disc demodulation circuit 2
The decoder 2 demodulates and reproduces the composite video signal and audio signal recorded on the analog recording track, and the decoder 23 reproduces the signal reproduced from the digital recording track using a known method. The address determination circuit 24 is the video disc demodulation circuit 2
2 and the decoder 23, and the video disc demodulation circuit 22
When the rear address signal is supplied, the output signal of the video disc demodulation circuit 22 is selectively outputted by the switch circuit 25, and when the address signal is supplied from the decoder 23, the output signal of the decoder 23 is selectively outputted by the switch circuit 25. and select output. The output signal of the switch circuit 25 is supplied to a monitor 26, where images are displayed and sounds are produced.

That is, when reproducing analog recording tracks I to S on the disc 1 shown in the first diagram, the video disc demodulation circuit 2
The output signal No. 2 is fed to the monitor 26 via the LIC, and a moving image is displayed and R8 of the audio accompanying it is performed. Thereafter, when the digital recording track t6 is reproduced, the switch circuit 25 selects the decoder 23, and when all the digital recording tracks 16 to 1++ are reproduced, the CR1 of the monitor 26 is selected.
' 27 includes, for example, the diagonally shaded section J 28 in Figure 6 (A).
A portion of the still image is displayed. Here, the time required to play back one screen's worth of digital recording tracks is approximately 2.26.
In seconds, approximately 1/1 of one screen is shown in Figure 6 (A>).
The time required to reproduce part 2 is approximately 0.19 seconds, and after switching from analog recording track playback to digital recording track playback, the part of the still image above does not last long. Is displayed. Further, a portion of this still image corresponds to the content of the audio output from the monitor 26, so that it does not give the viewer a sense of discomfort.

Subsequently, digital recording tracks t12 to t+6...
When one screen of .

Furthermore, it goes without saying that the sounds that are produced correspond to the ``Juki Shizuki'' and ``T'' images.

Note that a portion of a still image adjacent to the portion 28 in FIG. 6 (Δ) is recorded in digital recording tracks t12 to t16, and still partial images are similarly recorded in subsequent digital recording tracks. The disk 1 may be recorded so that the area of a portion of the still image displayed on the CRT 27 increases as the screen progresses, and the portion 28 may be located at any position on the screen. Not limited.

In addition, in Figure 5, the tracking ribo circuit and disk 1
The illustration of the rotation servo circuit is omitted.

Furthermore, the present invention is not limited to those in which tracks of an electrostatic capacitance change detection readable type video disc and a digital audio disc are mixed, and the switching position between an analog recording track and a digital recording track is limited to the fP3 recording position U. do not have.

Effects of the Invention As described above, in the information signal recording disk of the present invention, after the reproduction is switched from the analog recording track to the digital recording track, a portion of a still image is displayed without waiting, and this still partial image is displayed. A sound corresponding to the content is pronounced,
It has features such as not giving viewers a sense of discomfort.

[Brief Description of the 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 component code. 4 is a diagram showing an example of a signal format of one block of signals recorded on a digital recording track of a disk. FIG. 5 is a diagram showing an outline of an example of a playback head. The block system diagram, FIG. 6, is a diagram showing each embodiment of the display screen of a monitor obtained by reproducing the disc of the present invention. 1...In the information signal record! (disc), 4.5°11
...VTR16...Synchronization signal generator (SSG), 9
...Encoder for digital recording track, 12...
- Synchronizer, 13... Encoder for analog recording track, 14... CPU, 15... Tracking signal generator, 16... Recording device. Patent applicant: Victor Japan Co., Ltd. Figure 1

Claims (1)

[Claims] A first digital signal obtained by further modulating a first digital signal in which one block of signals including at least a plurality of channels of digital data obtained by digitally modulating a video signal and an audio signal, respectively, is synthesized block by block in time series. a digital recording track on which a first modulated wave signal is recorded; an analog recording track on which a second modulated wave signal obtained by analog modulation with a second information signal including at least a composite video signal is recorded; A first modulated wave signal containing digital data of a video signal representing a portion of a still image is placed in the first part of a digital recording track following the analog recording track in an information signal recording disk on which a mixture of information signals are recorded. An information signal recording disc characterized by recording information.