JPS6240884A - Sound recording and reproducing system with still picture - Google Patents

Abstract

PURPOSE:To improve the recording efficiency of a disk by recording and reproducing picture signals of (n) lines and a prescribed m-piece part of sound signals which are divided at every prescribed period under a condition where they are compressed in time base. CONSTITUTION:Signals of sections corresponding to each one line of the picture signal of Fig. (a) and sound signal of Fig. (c) are inserted at every one line of picture signals to the track of a video track as shown in Fig. (b). The picture signals of one line are recorded by compressing in time the signal of one horizontal period =TH to 1/2 and sound signals of the period TA are recorded in the remaining section of TH/2 period by compressing the time base. At the time of reproduction the signals of Fib. (b) read out in the compressed time base are written in a storage element in such a way that the picture signals and sound signals are respectively written in the storage element by the TH/2-period section and they are independently read out from the storage element in the original time base of Figs. (a) and (c) and are reproduced.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method for recording and reproducing audio with still images, and particularly for efficiently recording and reproducing image signals and audio signals of time-compressed still images on a video disc. The present invention relates to an audio recording and reproducing method with still images suitable for.

[Background of the invention]

A conventional method for recording and reproducing still images and audio such as their explanations on a video disc is as described in Japanese Patent Application Laid-Open No. 70721/1982, in which audio is recorded in an interval corresponding to one line every predetermined number of lines of the image signal of a still image. Record the signal by compressing the time axis,
The image signal of that line (or replaces it with the image signal of the previous line, or with the average value of the previous and previous lines) If you try to record an audio signal for a long time, the effective number of lines of the image signal will have to be significantly reduced, which will cause the image quality to deteriorate further. There is a drawback.

In order to avoid such image quality deterioration, Japanese Patent Application Laid-Open No. 54-277
As described in Publication No. 19, the time axis of the audio signal is compressed and recorded in frame units of the image signal, and when playing back, all of this audio signal is written to the memory, and the track on which one frame of the image signal is recorded is repeated. A method has been proposed in which audio signals are sequentially reproduced by time expansion from memory while still images are read and reproduced. However, in such a method, at least one frame of the image signal is
It is necessary to store an audio signal with an amount of information in memory,
The disadvantage is that a large amount of memory must be used.

[Purpose of the invention]

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to efficiently record time-base compressed audio signals together with image signals of still images. An object of the present invention is to provide an audio recording/playback method with still images that allows easy playback.

[Summary of the invention]

To achieve this objective, the present invention compresses the time axis of both image and audio signals line by line and records them on a video disk, thereby significantly reducing the memory used for time axis decompression and increasing the circuit scale. While keeping the
The feature is that it prevents deterioration of image quality due to a reduction in the number of lines of the image signal.

Note that the increase in the signal band due to time axis compression of the image signal is
You can deal with this by keeping the rotation speed of the video disc high < -f.

[Embodiments of the invention]

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

FIG. 1 is a signal configuration diagram showing a first embodiment of the audio recording/reproducing method with still images according to the present invention, in which [a] 11 is an image signal, and [b] is a signal that is synthesized into an image signal and an audio signal. In the recording signal, (C) shows the notation of the audio signal, (1) to (8) each show one line of image signal, and A1 to A8 each show the audio signal of a fixed time unit.

In the embodiment shown in the figure, fb) is added to the track of the video disc.
As shown in FIG. 2, a signal corresponding to one line of each of the image signal (a) and the audio signal (C) is inserted for each line of the image signal. The image signal of one line is time-compressed and recorded into a signal tf:l/2 with one horizontal period=TH, and the remaining TT1/2
The audio signal of the TA period is time-axis compressed and recorded in the time interval. During playback, f is read and read on a compressed time axis.
b) Image signal.

Each audio signal is written in a section of TH/2 to the storage element, and read out and reproduced from the storage element independently on the original time axis of +8) or tc). As the storage element, analog memory or digital memory such as COD or BBD can be used for both image signals and audio signals, but in any case, the image signal.

The capacity for one line is sufficient for both audio signals. Furthermore, the image signal is only subjected to time axis compression, and no line thinning or line frequency conversion is performed, so there is no deterioration in image quality.

The image signal band of a video disc is approximately 4 MHz, and when compressed on the Y 1/2 K time axis, it becomes approximately 8 MHz.
However, by doubling the number of rotations of the disk, it is possible to record and reproduce signals in this band. In this example, if the recording interval lengths of the image signal and the audio signal are equal, and therefore the audio signal is compressed in the time axis to have the same band as the image signal, and is similarly recorded on a disk using FM modulation, the band of the audio signal is 15 kHz. 1/2 per image frame
×63.5μsecX525X8MHz÷15KHz=
Approximately 8. ．． Can record and play back 5 seconds of audio signals. In addition, the audio signal part is converted into a digital signal instead of FM recording.
It is also possible to perform digital baseband recording using run length limited codes such as FM, EFM, etc. For example, in the BFM used in compact discs,
Approximately 720 baseband signals of approximately 2 Mbps
Can record in the KHz band.

On the other hand, a video disc uses a carrier of about 35 MHz as an image signal with a band of about 4 MHz at 1.7 MHz p.
.

It is FM modulated with a deviation of 8 on the disc.
．． 5 MHz + 0.8 MHz -t-4M
It has a band of approximately 13MHz.

Therefore, if you use EFM, 2MHzX13MHz/
720 KHz = approx. 36 Mbps I)
H-X band signals can be recorded and played back. This is 36 Mbps per frame of one image signal X 1/3
0 sec - approximately 1.2M pits, band 15K
Hz audio signal k 32KHz sampling, 8-bit quantization, 1.2M bits ÷ 8 bits ÷ 32
KHz sampling - approximately 4.5 seconds of audio signal. Furthermore, the same carrier as the FM part of the image signal (approximately 8.
5 MHz However, if recorded as twice the number of rotations of the disk, it would be approximately 17 MHz, but it is converted per image frame7)) and P 3 K using the same band.

It is also possible to perform digital modulation recording such as FSK and MSK. For example, M with a bandwidth of approximately 8.5 MHz
When SK modulation is performed, a baseband signal of approximately 9.6 Mbps can be recorded and reproduced, and the same quantization and sampling as in the EFM recording example described above is approximately 320 bits per frame of the image signal, and 320 bits per frame. It is possible to record and reproduce audio signals for approximately 162 seconds (total 8 bits/32 KHz sampling).

FIG. 2 is a conceptual diagram showing an example of recording tracks on a disk for signals of the still image-attached audio recording and reproducing system of the present invention.
b) )! The case where concentric tracks are used is shown, and 1 to
4.5a and 5b are track sections in which image signals for one frame are each recorded.

In FIG. 2), for example, both the time-axis compressed image and audio signals shown in FIG.

In the example of the spiral track shown in Figure 2), track section 1
, 2 each becomes one frame of image signal with two rotations. In the example of the concentric tracks shown in FIG. 2 fb), one rotation of each of the track sections 3, 4, 5a, and 5b results in one frame of image signal.

In the example shown in FIG. 2(a), a still image can be reproduced by performing two track jumps in the duty retrace section of the image signal once every two revolutions of the disk, for example, by reproducing only track section 1. Further, in the example shown in FIG. 2(b), a moving image can be played back if one track jump is performed for each revolution of the disk, and a still image can be played back if no track jump is performed.

In this way, by reading the time-compressed audio signal from the disk at the appropriate time while playing still images, expanding the time axis, and playing it back, it is possible to create a system that is ideal for playing back still images and their commentary audio at the same time. Become. In the signal of the embodiment shown in FIG. 1, 172 lines of pictures and 172 lines of audio are recorded. For example, on an optical video disc, approximately 25,000 still pictures and audio signals corresponding to their descriptions can be recorded. The audio playback time per still image varies depending on the audio recording method, but as described above, playback time of 2 to 8.5 seconds is possible in the audio band of 15 KHz.

A band as high as 15 KHz is not necessary for explanatory audio of still images, and if the band is f3 KHz, for example, playback for 10 to 43 seconds is possible. To extend the audio playback time per still image or widen the audio band, for example, see Figure 2 fb.
), the same image signal is recorded in the track section VC for two frames sa and sb, and for example, after playing back all the audio signals of the track section 5a, the track section 5a is jumped to and played back, or the track section 5a is recorded every rotation. If the playback jumps from the track section 5b to the track section 5b and from the track section 5b to the track section 5a, the audio playback time per still image will be doubled.

FIG. 3 is a signal configuration diagram showing a second embodiment of the still image-attached audio recording and reproducing method according to the present invention;
tb), [cl is a recording signal obtained by combining one image signal and an audio signal, respectively, as in FIG.

The pattern of the audio signal is indicated by the symbol V1. v2...
... is an image signal for one line, A I r A 2.
. . . is an audio signal in units of fixed time. Further, for the sake of simplicity, the audio signal is compressed into 1/2 line time in units of time of 2 lines, but it goes without saying that it can actually be compressed.

In Figure 3, as in Figure 1, one line (=
The image signal of TI() is compressed to a time of T□/2, and the remaining T
Audio signals are compressed and recorded in H/2 time. In this embodiment, by selecting an integer multiple of the horizontal scanning period, such as the audio signal value TA-TH×2, for example, the next A2 section is read at the same time as the expansion playback of the A2 section ends.

The timing is set so that the section can start reading from the disc, making continuous playback of audio easier.

FIG. 4 is a signal configuration diagram showing a first embodiment of the still image-attached audio recording and reproducing method according to the present invention, in which the still image signal and the audio signal have an increased audio signal reproduction time corresponding to a single still image. This is an example of the signal configuration when recording signals on a disk.
al e (b) −fcl and symbol V1°V2...
・・・・・・＊ ' A I + A 2・・・・・・
. . . is the same as in FIGS. 1 and 3.

In FIG. 4, the image signal of one line (""TH) is compressed into TH/40 hours, and the audio signal is compressed and recorded in the remaining time of THX3/4. Here, TA=TH×263
The audio signal is compressed in time. According to this embodiment, one frame, that is, one still image, and three frames worth of compressed audio a are recorded. It is possible to record and play back an audio signal that is three times as compressed as when recording and playing back a frame's worth of compressed audio signals, and therefore at 15KHz.
When using the above modulation for a bandwidth audio signal, approximately 6~
The recording and playback time of 25 seconds is also 3 KHz (1)
Bandwidth audio signals can be recorded and played for a time of approximately 30 to 127 seconds. As an example of a long-time playback method for audio, we have previously explained an example in which multiple frames of the same image are recorded. In the case of a recordable disc, in order to record one image and digitally modulated audio signal with a 3KHz bandwidth for about 30 seconds, it is necessary to record 6 discs.
Tracks for rotation are required. On the other hand, in the method of the embodiment shown in FIG. 4, since the compression ratio of the entire signal is 4 times as high, it is possible to reproduce the audio signal for the same amount of time using tracks corresponding to four rotations of the disk.

FIG. 5 is a signal configuration diagram showing a fourth embodiment of the still image-attached audio recording and reproducing system according to the present invention;
+bl, "fc) and V,, V2...----,
A1°A2 . . . are the same as in each of the above embodiments. Also, for the sake of simplicity, which will be explained in this embodiment, the audio signal is divided into 1/4 line (=TH
/4) minutes and is shown as □. In this embodiment, the audio signal is compressed and recorded in three sections each having an interval of TH/4, so that the capacity of the storage element required for time axis expansion of the audio signal is reduced. In this embodiment, when the compression rate is the same as that of the embodiment shown in FIG. 4, the storage element capacity is required to be 1/3 of that of the embodiment shown in FIG. 4 in order to decompress and reproduce an audio signal of the same duration. Furthermore, as shown in Figure 5 + d), symbols such as "1051", "1", etc. are placed at the positions 6a, 6'b, and 6cl at the beginning of the time-axis compressed audio signal, respectively. Address "526" is encoded and recorded, and during playback, this address code is referenced to select the necessary audio signal block and process the signal.Of course, this control signal is not sent at the beginning of each audio signal block, but at the beginning of each audio signal block. It is also possible to record control signals in other positions than addresses.It is also effective to record control signals in this position and use them for various purposes.For example, as a signal indicating the beginning or end of an audio signal block. Come in,
When the end block is played, it can be controlled to automatically return to the beginning and repeat playback, or to advance playback to the next still image.

FIG. 6 is a signal configuration diagram showing a fifth embodiment of the still image-attached audio recording and reproducing system according to the present invention.
(b) e Ic) and Vl, V2---------
, A1°A2, . . . are the same as in each of the above embodiments.

In the same figure, unlike the previous embodiments, 3TH is taken as one unit, and the image signal of three consecutive lines is compressed and recorded in a time of TH x 3/2, and the remaining TH x 3/2 is recorded.
During period 2, the audio signal is compressed and recorded. If the image is recorded using FM modulation and the audio signal is recorded digitally, it may take some time to start up the clock and carrier when switching from the image signal to the audio signal during playback until normal playback resumes. This part becomes an obstacle to increasing the recording density. Therefore, as in this embodiment, the recording density can be improved by switching between image and audio for every plural lines. In this embodiment as well, in order to simplify the explanation, the audio signal is compressed and recorded in 3/2 lines in time units of 3 lines, but it goes without saying that it can actually be recorded at a much higher compression ratio. stomach. In addition, in order to minimize the recording density loss in the switching part from the image signal to the audio signal when recording the audio signal digitally, the audio signal is recorded with digital modulation, and the FM modulation part of the image signal is It is effective to make the phase of the carrier to this digital modulation part continuous, so that the phases of both the image and audio signals are continuous, since it is possible to reduce fluctuations in the demodulated signal at the signal switching part. For example, from FM to QPSK
In such a case, the phase difference between the two signals may be within 90'.

Next, an embodiment will be described for efficiently recording and reproducing even when the length of the audio signal for each still screen is different in the audio recording and reproducing method with still images according to the present invention.

FIG. 7 is a diagram showing recording tracks of a disk when signals are recorded on a disk with spiral tracks in the audio recording/reproducing method with still images according to the present invention, f8) is an overall view, fb) is an enlarged view of the boundaries of each track. In this embodiment, it is assumed that one frame of image is recorded on two tracks.

In the figure, one still image and an audio signal for a certain period of time are time-compressed and recorded on track 7.

Also, one still image is recorded with the same signal over two frames and one norm on tracks 8a and 8b, and the audio signal is compressed to twice the time of the audio signal on track 7.
It is recorded in a and 8b. At the rear end of each track, control signal sections 10 to 12 are provided, as shown in FIG. A control signal indicating that the frame is the last frame is also sent to track 8.
Subsequently, in the control signal portion of a, a control signal indicating that there are frames of the same image is recorded. When playing the signal,
By referring to these control signals and controlling the track jump of Debsk's signal reading device, the length can be changed according to the number of recording frames (number of tracks) and audio playback time of still images on the same disc. Playback automatically becomes possible according to the number of recorded frames. The track jump control method depends on whether the recording track is spiral or concentric, and when an audio signal is recorded over two or more frames, the first half and second half are divided into tracks 8a and 68b shown in FIG. 7, respectively. Track 8 is recorded sequentially.
It differs depending on the case where the information is recorded alternately in a and 8b. As in the embodiment shown in FIG. 7, when audio signals are sequentially and alternately recorded on tracks ga and 8b in a spiral track,
The control signal section 10 of the track 70 shown in FIG.
In this case, it is sufficient to record a signal that jumps the track for four revolutions as a signal indicating the final frame. Also,
A -r signal is recorded in the control signal section 11 of the track 8a to indicate that the same image is recorded in the following frame, but in this example, there is no need to perform a track jump here, so nothing is recorded. You don't have to. On the other hand, the first half of the audio signal is recorded on track 8, and the second half is recorded on track 8b.
In such a recording method, each track is played by jumping the same number of times depending on the compression rate of the audio signal, so the end flag is set only in the control signal section 10.12 of the final frame. Records of various signals
Alternatively, a signal such as a continuation plug may be recorded at the input of the control signal portion 11 of the intermediate frame.

Of course, recording both of these signals does not impair the effect in any way. Furthermore, in this case, control signals corresponding to the number of recording frames (number of tracks) of each still image are sent to the control signal sections 10 and 12 of the final frame, and, for example, a track jump signal for two rotations is sent to the control signal section 10 of track 7. If a track jump signal for four rotations is recorded in the control signal section 12 of the track 8b, it is effective when the same still image is repeatedly reproduced together with the audio.

Furthermore, in order to confirm whether or not the track has jumped to a predetermined position during track jump, the track number is recorded as a control signal for each rotation of the track in the fixed section 13 to 17 shown in Figure 7+b> (shown in Figure 7). It is effective to control the reading device by referring to this track number.In particular,
In order to read the track number even during a track jump, the track number is repeatedly recorded in sections 13 to 17 as shown in the figure, and this section is used as a track jump section.
Be sure to start track jumping only within this section.

It is better to allow termination to take place.

FIG. 8 is a block diagram showing the basic configuration of a video disc reproducing apparatus for reproducing signals recorded with the signal configurations described in the above embodiments of the still image-attached audio recording and reproducing method according to the present invention, 18 hair 1 spindle motor,
19 is a video disk, 20 is a pickup, 21 is a demodulation/separation circuit, 22 is an image signal time axis expansion circuit, 23 is an image signal output terminal, 24 is an audio signal time axis expansion circuit, 25
is an audio signal output terminal.

In the figure, a signal read by a pickup 20 from a video disk 19 rotated by a spindle motor 18 has a configuration as shown in FIG. 1(b) K, for example. The signal from the pickup 20 is input to the demodulation/separation circuit 21&C, where the image signal part is demodulated by FM demodulation, a synchronization signal is detected, and the audio signal section is demodulated according to the signal method using this synchronization signal as a reference. , the image signal, audio signal, and synchronization timing signal FT are output as they are time-base compressed. Image signal time axis expansion circuit 2
2 has an analog memory, such as a CCD, which has a capacity for one line, and expands the time axis by adjusting its writing and reading clocks. The synchronization timing signal PT is used to control the start and end of inputting the signal to the memory, and to superimpose the video synchronization signal on the output signal. The image signal time axis expansion circuit 22 outputs a time axis expanded video signal for each line to an output terminal 23. Further, the image signal time axis expansion circuit 22 includes, for example, A
It consists of a /D converter, a digital memo IJ, a D/A converter, and a memory control circuit.

When the audio signal is an analog signal of FM recording, the audio signal time axis expansion circuit 24 has almost the same configuration as the image signal time axis expansion circuit 22 described above (superimposing a synchronizing signal -f'
The compressed audio signal from the demodulation/separation circuit 21 is expanded on the time axis based on the synchronization timing signal PT, and is output to the audio output terminal 25. Furthermore, when the audio signal is a digital signal, the audio signal time base expansion circuit 24 is composed of a digital memory, a D/A converter, and a memory control circuit.

FIG. 9 is a block diagram showing an embodiment of a reproducing apparatus in which the signal having the configuration shown in FIG. 5 is recorded in the format shown in FIG. , 20 is a big amplifier, 22 is an image flA signal time axis expansion circuit, 23 is an image signal output terminal, 25 is an audio signal output terminal, 26 is a pickup control device, 27 is a control signal detection circuit, 28 is a demodulation separation circuit, 29 is a voice order signal detection circuit, 30 is a comparator, 31 is a counter, 32
is a write address counter, 33 is a RAM control circuit, 34
is a read address counter, 35 is RAM, 36 is D/A
converter and audio output circuit.

In this embodiment, signals including address signals indicating the playback order of audio signals as shown in FIG. 5 are recorded on a spiral track together with one frame of image signal in two rotations of the disk as shown in FIG. , track jump system a1 signal every 7 turns (2 rotations) and track number (1
The explanation will be made assuming that the number of rotations is increased by 1). Further, the explanation will be given assuming that the audio signal is digitized. It is assumed that the number of recording frames per still image is of variable length, and that audio is recorded in each frame by being distributed repeatedly or alternately or sequentially. As for the track jump control signals, it is assumed that for each still image, track jump signals of the number of tracks corresponding to the number of frames of the still image are recorded on the final track, and a NULL signal is recorded on the intermediate track.

In the figure, a signal read by a pink-up 20 from a disk 19 driven by a spindle motor 18 is demodulated and synchronized by a demodulation/separation circuit 2811'i, and is converted into images and audio.

Separated into control signals. Similar to the embodiment shown in FIG.
It is output from On the other hand, the control signal is transmitted to the control signal detection circuit 2.
7, when a track jump signal is detected,
A signal corresponding to the value is sent to the pickup control device 26 to cause the pickup amplifier 20 to jump in rank to enable still image reproduction. At this time, the control signal detection circuit 27
By referring to the track number before the track jump and the track number after the jump, and performing a comparison operation with the value of the track jump signal, if an erroneous track jump is detected, a mute signal is sent to the D/A converter and audio output circuit 36. At the same time, a signal is sent to the pickup control device ff1i to jump back to the correct track.

The compressed audio signal separated by the demodulation/separation circuit 28 is time-axis expanded by the RAM 35.

From the compressed audio signal, the audio sequence signal detection circuit 2
The address signal is detected by 9 and compared with the value of counter 31 by comparator 30. When a desired address signal is detected and a match pulse is output from the comparator 30, the write address counter 32 is reset and the R
A write enable pulse is sent from the AM control circuit 33 to the RAM.
35, the write address counter 32 counts up, and the output is sequentially sent to the RA via the RAM control circuit 33.
Give the write address to M35 and send the necessary audio data to RA
Write to M35. When the necessary audio data has been stored in the RAM 35, the write address counter 32 sends a pulse to the counter 31, the counter 31 counts up, and waits for the address signal of the next audio signal. On the other hand, the read address counter 34 gives the read address to the RAM 35 via the RAM control circuit 33 at the timing when the time axis of the audio signal is expanded, and the output of the RAM 35 is outputted to the analog audio signal by the D/A converter and the audio output circuit 36. The signal is converted into a signal and output from the output terminal 25.

In the embodiments shown in FIGS. 8 and 9, the synchronization signal is reproduced from the image signal, but it is also possible to record it in digital form within the audio signal and reproduce it. It's okay. It is also possible to stabilize the operation by providing a synchronizing signal to each of the image signal and the audio signal and performing synchronous detection on each of them.

In the above explanation, the explanation has been centered on a video disc having a spiral track using the still image-attached audio signal recording and reproducing method according to the present invention, but the same applies to the case of concentric tracks, with only a slight difference in the track jump part. It goes without saying that the present invention can be applied to.

FIG. 10 is a block diagram showing a recording device for the still image-attached audio recording and reproducing system according to the present invention. A time axis compression circuit, 41 a timing generation circuit, 42 an audio signal time axis compression circuit, and 43 a control signal. 44 is a signal synthesis circuit, and 45 is a recording signal output terminal.

In the figure, the image signal, video synchronization signal, and audio signal supplied from input terminals 37, 38, and 39 are as follows.
An image signal time axis compression circuit 40, a timing generation circuit 41, a track jump signal, a track number signal, and an audio reproduction order signal are generated based on the audio signal time axis, respectively, a signal synthesis circuit 44, and an image signal time axis compression circuit, respectively. 40
．． The audio, image, and audio signals are supplied to a recording mechanism such as a compressed audio signal from a time axis compression circuit 42 and a timing generation circuit 41 .

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to reproduce still image information and audio information with a small number of storage elements, improve the recording efficiency of the disk, and provide still images and related information at low cost and with high performance without deterioration of image quality. Therefore, it is possible to provide an audio recording and reproducing system with still images that has excellent functions except for the drawbacks of the above-mentioned conventional technology.

[Brief explanation of the drawing]

FIG. 1 is a signal configuration diagram showing a first embodiment of the still image-attached audio recording and reproducing system according to the present invention, FIG. 2 is a conceptual diagram showing an example of recording tracks on a disk according to the present invention, and FIG.
FIGS. 4, 5, and 6 show a second method of recording and reproducing audio with still images according to the present invention. Signal configuration diagrams showing the third, fourth and fifth embodiments; FIG. 7 is a τ diagram showing recording tracks when signals are recorded on a disk with spiral tracks according to the still image-attached audio recording and reproducing method of the present invention; , FIG. 8 is a block diagram showing the basic configuration of a playback device of the still image-attached audio recording/playback method according to the present invention, and FIG. 9 shows the signal of the embodiment of the present invention shown in FIG. 5 in FIG. FIG. 10 is a block diagram illustrating an embodiment of a reproducing apparatus for recording in a still image recording/reproducing system according to the present invention. 1-5.7-9... Recording track, 6...
...Address signal, 10-17...Control signal,
18゛...Spindle motor, 19...
・Disc, 20...Pickup, 21.2
8...Demodulation separation circuit, 22°...Image signal time axis expansion circuit, 24...Audio signal time axis expansion circuit, 26...Pickup control device ,2
7... Control signal detection circuit, 29... Address □ detection circuit, 30... Comparator, 31...
...Counter, 32...Write address counter, 33...RAM control circuit, 34...
...Read address counter, 35...RAM,
36...D/A converter and audio output circuit. Agent: Patent attorney Kenjibu Take (1 person). Figure 2 tσ (b) 5σ

Claims (7)

[Claims] (1) In a still image audio recording and reproducing method in which an image signal and an audio signal accompanying the image signal are recorded and reproduced on a disk, n of the image signal of the track on the disk (where n= 1, 2, 3, etc.) for each area required for recording lines, a predetermined m of the image signal of n lines and the audio signal divided for each predetermined period (however, m=1, 2
, 3, ...) segments are recorded and played back in a time-axis compressed manner. (2) In claim (1), the audio recording with still images is characterized in that the image signal is recorded on a track where one frame is formed by one or an integral number of rotations of the disk. Playback method. (3) In claim (1), the same image signal is recorded one frame at a time for each of a plurality of tracks formed every rotation of the disk, and the same image signal is recorded over the plurality of tracks. An audio recording and reproducing method with still images, characterized in that the audio signal is recorded. (4) According to claim (2) or (3), the still image recording apparatus is characterized in that a control signal such as a track jump control signal is recorded every time one frame of the image signal is recorded. Audio recording and playback method. (5) Claims (1), (2), (3)
) or (4), wherein the predetermined period of the audio signal is a period equal to a period of an integer line of the image signal. (6) Claims (1), (2), (3)
), (4) or (5), the image signal is FM modulated and recorded, the audio signal is digitally modulated and recorded using a carrier wave of the same frequency as the carrier wave of the image signal, At the boundary between the image signal and the audio signal, the image
An audio recording and reproducing method with still images characterized in that the phases of both audio signals are continuous. (7) Claims (1), (2), (3)
), (4), (5), or (6), control information indicating a chronological reproduction order of the audio signal is recorded for each recording section of the audio signal. Audio recording and playback method with still images.