JPH01272275A - Video signal processing method - Google Patents

Abstract

PURPOSE:To attain reproduction rich in variety by designating and selecting either one video mode out of the two types of animated picture mode and a still picture mode. CONSTITUTION:Frames at a prescribed interval are pulled out from a frame column constituting a video signal, the respective frames of the frame columns constituting a series of a still picture train having the independent contents from the video signal are dispersively inserted at the position, and the stationary picture reproducing mode to reproduce/display the inserted stationary picture train after the pulling-out and the animated picture reproducing mode to reproduce/display the video signal from which the frame column is eliminated are provided. In the animated picture reproducing mode, when the pulled-out frame position is reproduced, the picture obtained by freezing the frame signal at the immediately preceding position is displayed, and in the stationary picture reproducing mode, the respective frame signals constituting the stationary picture train are reproduced while being frozen on the frame memory until the next frame signal arrives. Thus, the reproduction rich in variety is attained.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is applicable to video and audio playback devices using recording media such as optical disks such as laser disks and magnetic recording media, and receiving devices for simultaneous video and audio communication. A video signal processing method ζ that can be used.

2. Description of the Related Art A conventional video/audio reproducing apparatus using a laser disk reproduces one type of video corresponding to one audio. For example, the sound reproduction device described in Utility Model Application Publication No. 57-170007 describes a method of reproducing a screen (video) with one type of corresponding text (lyrics) for one type of audio (song). .

Problem 2 to be Solved by the Invention In the conventional video/audio playback device, as described above, there is a problem in that only one type of video corresponding to one sound can be played back. In particular, when playing music or other audio-based software, users may experience ``boredom''.
It is conceivable that only the image may be changed in order to prevent the user from feeling the same, but this cannot be achieved with conventional equipment.

The present invention has been made in view of the above, and its first purpose is to provide two types of modes for one audio: a moving image mode and a still image mode (plurality) having different contents from the moving image mode. The purpose of the present invention is to provide a video signal processing method that allows the user to select and specify one of the video modes during playback. , to provide a video signal processing method that can freely set the switching timing of still images that are sequentially played back. The fourth objective is to provide a video signal processing method that simultaneously displays video and still images corresponding to To provide a video signal processing method that superimposes a moving image corresponding to audio and a still image and displays them on one display.

Means for Solving the Problem In order to achieve the above first objective, fields (frames) are extracted at predetermined intervals in a field (frame) sequence that constitutes a video signal, and the positions of the extracted fields (frames) are determined. , each field (frame) of a field (frame) sequence constituting a series of still image sequences having contents independent of the video signal is distributed and inserted, and during playback, the series of fields inserted after the extraction is performed. There are two modes: a still image playback mode that plays back and displays a still image string consisting of a field (frame) string, and a video playback mode that plays and displays the video signal excluding the field (frame) string. mode, when playing back the extracted field (frame) position, the field (frame) signal at the immediately previous position is played back to the field (frame) position.
In still image playback mode, each field (frame) signal that makes up a still image sequence is displayed in the field (frame) memory until the next field (frame) signal arrives. In order to achieve the second purpose, when a specified still image field (frame) row is sequentially played back in the still image playback mode, it is configured to be played back while being frozen. The field (frame) signal sent in is stored in the field (frame) memory, and the timing is adjusted when the synchronization pulse arrives in accordance with the content of the audio information (rhythm or phrase), and the field (frame) signal is・It is configured to send field (frame) signals stored in memory to a display as still images, and in order to simultaneously play back moving images and still images in order to realize the third purpose, A configuration in which multiple fields (frames)/memories corresponding to the number of screens and the same number of displays corresponding thereto are provided, and if necessary, a predetermined delay function is added to the fields (frames)/memories used for still image playback. Furthermore, in order to achieve the fourth objective, in order to synthesize moving images and still images that are played simultaneously, a plurality of fields (frames) and memories corresponding to the number of screens and memories that are connected to each other are used. A new superimpose circuit for compositing is provided, and if necessary, a delay circuit is added to delay the output of a field (frame) memory for still image reproduction by a predetermined time.

Function The present invention enables the user to specify and select one of two video modes, a moving image mode and a still image mode, for one audio using the method described above.
Unlike conventional playback methods, this allows you to change the video by specifying the mode each time the same audio is played over and over again.Furthermore, in still image mode, if necessary, you can Still images can be switched in synchronization with rhythms and phrases, and it is also possible to specify both video and still images to display and play independent content on multiple displays at the same time. Still images can be combined and played back as a single screen, and if multiple still image sequences are prepared, the still images to be combined can be freely selected from among them.
It can have variety.

Embodiment FIG. 1 is a block diagram showing the basic configuration of an apparatus for implementing a video signal processing method in an embodiment of the present invention. 1st
In the figure, reference numeral 2 denotes a signal detection circuit for reading out signals from the laser disk 1 on which analog television signals are recorded, amplifying and preprocessing the signals. The signal detection circuit 2 includes a pickup means (not shown) for reading information. Reference numeral 3 denotes a video processing circuit for extracting a video signal, that is, a field signal string, from the output signal V of the signal detection circuit 2. The output signal can be used as is for display, or can be used to convert each field of the field signal string into a predetermined format. The signal is supplied to the field memory circuit 5 for holding for a predetermined period of time.

4 is an audio processing circuit which demodulates and amplifies the audio signal from the output signal V of the signal detection circuit 2 and sends it to the speaker 7. Reference numeral 6 denotes a display for directly receiving the output of the field memory circuit 5 or the output of the video processing circuit 3 to reproduce and display still image sequences or moving images.

8 receives and processes the mode setting signal S and the output V of the signal detection circuit 2, and provides a write control signal W and a display control signal r to the field memory circuit 5 to control the field signal capture and output timing. switch circuits 9A and 9B for selecting whether to output the output of the video processing circuit 3 to the display 6 as it is or to output it after passing through the field memory circuit 5.
This is a mode control circuit that generates an output switching signal t for controlling the output switching signal t.

FIG. 2 is a block diagram showing the inside of the field memory circuit 5, in which there are two field memories 5A and 5B.
It is composed of a human input signal switch 5C1 for selecting which output to write in, and an output switch 5D for selecting which output of the two field memories 5A and 5B to display using a display control signal r. . Basically, when one memory is used for writing, the other memory is used for display, and so on.

The control signals W, r for the field memory circuit 5 are:
It is obtained by processing the mode information recorded in the vertical retrace interval of the video signal obtained from the output V of the signal detection circuit 2 and the mode setting signal S in the mode control circuit 8.

FIG. 3 is a diagram showing the internal configuration of the mode control circuit 8, including a mode information detection circuit 8A for extracting the mode information and channel information recorded in the vertical flyback section, and an output of the mode information detection circuit 8A. Should both outputs of the mode setting signal S be taken in, and the write control signal W and display control signal r according to the processing content, and the video signal once taken in by the field memory circuit 5 and then sent to the display 6?
or an output switching signal t that controls whether to send it directly to the display 6 without passing through the field memory circuit 5.
The field control signal generating circuit 8B generates a field control signal. The above mode information is information for determining whether each field constitutes a moving image or a still image sequence, and the channel information is identification information when multiple still image sequences are provided. .

FIG. 4 is a time chart showing the positions of the mode information and channel information just described and the relationship between various control signals generated based on them.

FIG. 4(1) shows an example of the arrangement of recording positions of mode information and channel information. The mode information in this figure records data indicating that it is a still image field.

FIG. 4 (2) shows the timing of generation of the still picture field flag signal f indicating the position of the still picture field.
Figures (3) and (4) respectively show the timing of generation of the write control signal W and the display control signal r for writing and displaying the field to be frozen. It is assumed that the still picture field flag signal indicating the mode information in (2) above is recorded in the vertical synchronization period of the field immediately before the field desired to be displayed as a still picture.

In the example of FIG. 4, since the first field has mode information, this indicates that a still image field exists in the next second field.

FIG. 5 shows the first operation of the first embodiment in the block diagram of FIG. 1, that is, the still image mode is specified by the mode setting signal S, and the still image sequence B (Bl, B2 .
. . ) is a time chart for explaining the operation when selecting and reproducing.

In this operation, the switch circuits 9A and 9B in FIG. 1 are always connected to the b side.

The operation in the still image playback mode will be explained below with reference to this figure.

In Figure 5, (1) represents the television video signal,
(2) indicates the position of the still picture field flag signal f indicating that field B to be displayed as a still picture is in the next field, and (3) indicates the position of still picture fields B1, B2, . . . in the field memory circuit 5. (4) is the position of the write control signal W for importing, and (4) is the position of the display control signal r for displaying these field columns on the display.
(5) shows the state of writing to the field memory circuit 5, and (6) shows the state of the display on the display 6.

Further, An (n is an integer) indicates each field constituting the moving image, and an (n is an integer) indicates a vertical blanking interval corresponding thereto. Bn (n is an integer) indicates each field constituting the still image sequence, and bn (n is an integer) indicates the vertical retrace interval corresponding thereto.

A detailed explanation will be given below with reference to the time chart shown in FIG.

First, as shown in FIG. 5(2), when the still image flag f1 is set in the field one field before field Bl, that is, in the position corresponding to the vertical blanking interval a2 of field A2, the next field B1 is vertically moved. The write control signal W1 is generated as shown in FIG. 5(3) in synchronization with the end of the retrace section, and the field continues until the video signal of that field ends as shown in FIG. 5(5). - Write to memory 5.

Next, as shown in FIG. 5(4), when roughly entering the vertical retrace interval of the next field A4, the display control signal r1 is generated, and the display control signal - Controls the field memory circuit 5 to display data, that is, field still image B1, on the display 6. If a field signal other than B comes, the channel control circuit 8 outputs a write control signal W and a display control signal r. Therefore, the field is not taken into the field memory circuit 5, and only the contents of B are always displayed.

FIG. 6 is a time chart for explaining another operation in the first embodiment, that is, the operation in the video playback mode. The operation in the video playback mode will be explained below with reference to this diagram.

In Figure 6, (1) television video signal, (2
) still image field flag signal f, (3) write control signal W, (4) display control signal r, (5) state of writing to field memory circuit 5, and (6) state of display on display 6, respectively. This completely corresponds to what was described in FIG. Also, (5a) shows the state of the contents of the field memory stored in the field memory circuit 5, and (5b) shows the state of the output switching signal t for switching the signal manually input to the display 6. It is a chart.

A specific explanation of this operation will be given below.

First, as shown in FIG. 6(2), when the still image flag fl is set at the position corresponding to the vertical blanking interval a2 of the field A2, which is one field before the field B1 constituting the still image sequence, At the same time as the end of the vertical retrace section a2 of field A2,
), a write control signal wl' is generated, and writing to the field memory circuit 5 is performed until the video signal of the field is completed, as shown in FIG. 6(5).

Next, as shown in Figure 6 (4), the next field B
When entering one vertical retrace interval, a field display control signal rl' is generated, and field A2 is taken into the field memory circuit 5 by the display control signal rl'. FIG. 6 (5a) shows that the field contents are held until the next display control signal ``2'' is received.

FIG. 6(5b) shows the display control signals rl' and r2.
The time of 1 field from the time when ' occurs <pM leap),
The switch circuits 9A and 9B in FIG. 1 are changed from the position a to the position b, that is, the position where the output of the video processing circuit 3 in FIG. 1 is sent directly to the display 6, by the output switching signal t of the mode control circuit 8. −degree field・
It shows a state in which the memory circuit 5 freezes and then switches to the position where it is sent to the display 6.

As a result, as shown in FIG. 6 (6), a certain position of field B of the original television video signal is replaced with the immediately preceding field A, and the display 6 displays only the field row for , that is, the moving image is played back. The state will be as follows.

If this field replacement is performed infrequently, for example, by replacing one field every several dozen fields, the video will be smooth and no problems will occur.

FIG. 7 is a time chart showing the operation of the second embodiment of the present invention, which is designed so that the relationship between sound and picture does not deviate when sound is also played back at the same time in the still image playback mode.

This second embodiment can be realized by replacing mode control circuit 8 with mode control circuit 8X shown in FIG. 8 in the configuration of FIG. 1.

The mode control circuit 8X is realized by adding a delay circuit 8C to the output of the display control signal r in the mode control circuit 8 shown in FIG. 3, which adds a predetermined delay amount τ based on an external control signal. .

In Fig. 7, (la) and (1b) are the television video signal and the corresponding audio signal (after demodulation).
shows. (4) and (6) in FIG. 7 are (4) display control signal r and (6) in the first embodiment of FIG. 5, respectively.
) shows the same display status as the display 6, (7
) and (8) respectively show the display control signal r and the display state of the display 6 in the second embodiment, that is, the present embodiment.

Further, τ in FIG. 7 indicates the delay time of the delay circuit 8C set by the control signal in FIG. Compared to the embodiment, it can be shifted backward in time by τ.

Since this delay time τ can be controlled and varied from the outside, the timing of still image switching can be controlled to match the content of the audio signal shown in FIG. 7(lb).

In other words, by using this function, when editing field data and creating a disc, you do not have to be so careful about where to insert still images.

It is also possible to create special effects by intentionally shifting the timing of the sound and picture during playback.

In the two embodiments described above, only one type of still image sequence B is inserted, but it is also possible to insert another still image sequence at the same time. For example, when adding a still image column C, the mode setting signal S can select one of the moving image, still image B, and still image C to be displayed and reproduced, allowing for more diversity. can.

FIG. 9 shows that when a still image sequence and audio are played simultaneously in the still image playback mode, when the still image switching timing is played back in a more closely related manner to the audio, for example, in accordance with the rhythm of the music, or 12 is a time chart showing the operation of a third embodiment in which still images are switched in accordance with the phrases of a song, that is, still images are reproduced in synchronization with the content of audio.

This third embodiment can be realized by replacing the mode control circuit 8 with the mode control circuit 8Y shown in FIG. 10 in the configuration of FIG. 1.

The mode control circuit 8Y includes a mode information detection circuit 8A for extracting the mode information recorded in the vertical retrace section of the field signal shown in FIG. synthesizes the output of the audio synchronization signal detection circuit 8D, the mode information detection circuit 8A, the output of the audio synchronization signal detection circuit 8D, and the mode selection signal S to generate a write control signal W at a predetermined timing, and It is comprised of a field control signal generation circuit 8B' that generates a display control signal r when an audio synchronization signal arrives.

Also, the output switching signal t of this mode control circuit 8Y
operates in the same manner as the mode control circuit 8 in FIG.

Note that the positions of the mode information and the audio synchronization signal shown in FIG. 11 are merely examples, and they may be placed at other positions.

In FIG. 9, (la) and (1b) indicate a television video signal and a corresponding audio signal (after demodulation). (2), (3), (4), (5), (6
) respectively indicate the still picture field flag signal f, the write control signal W, the display control signal r, the state of writing to the field memory circuit 5, and the state of display on the display 6.

In Fig. 9, in the vertical flyback section shown in (1a),
Audio synchronizing signals are recorded in sl and s2 indicated by crosshatches, and these correspond to the positions of the audio at which it is desired to switch the displayed still image, Pl and P2 shown in (1b). (2) Still image field flag signal f
, the write control signal W in (3), and the state of writing to the field memory circuit 5 in (5) are exactly the same as in the first and second embodiments already described. Since the display control signal r in (4) is generated in complete correspondence with the audio synchronization signal, the timings of sl, s2, . . ., PI, P2, . . . are shown in FIG. 9 (6). The information on the display will change.

That is, in this third embodiment, for example, Pl, P2,
If we think of ... as a rhythmic accent in music, the screen can be switched according to the accent, allowing for richly expressive playback.

FIG. 12 is also a time chart showing the operation of an embodiment in which still images are played back in synchronization with audio content in the still image playback mode, and corresponds to the fourth embodiment of the present invention.

This fourth embodiment can be realized by replacing the mode control circuit 8 in the configuration of FIG. 1 with a mode control circuit 8Z shown in FIG. 13. The mode control circuit 8Z receives a frequency-superimposed EFM (
Eight to Fourteen Modulati
on) EFM signal extraction circuit 8E that extracts the signal, and the EF
It consists of a subcode detection circuit 8F for detecting subcode information from the output of the M signal extraction circuit 8E, and an audio synchronization signal extraction circuit 8G for extracting the audio synchronization signal recorded in the subcode information. The output of the audio synchronization signal detection circuit 8D', the output of the channel information detection circuit 8A, the output of the audio synchronization signal detection circuit 8D', and the mode selection signal S are synthesized to generate a predetermined write control signal W. The field control signal generation circuit 8B'' generates a display control signal r when a synchronization signal arrives.

According to the CD standard, the signals that constitute the above subcode information are P, Q, R, S, T, U,
Eight types of signal names, V and W, are given, of which six signals from R to W are not currently used, and the above-mentioned audio synchronization signal can be placed in this area.

In FIG. 12, (1a) and (1b) show a television video signal and a corresponding audio signal (after demodulation). (2), (3), (4), (5),
(6) shows the still picture field flag signal f, the write control signal W, the display control signal r, the state of writing to the field memory circuit 'I@5, and the state of display on the display 6, respectively. The write control signal W shown in FIG. 12 (3) and the write state to the field memory circuit 5 shown in FIG. 12 (5) are exactly the same as in the first, second and third embodiments already described. (4) Display control signal r! fP
1 and P2, the display on the display 6 switches at the timing of Pl, P2, . . . as shown in (6). In other words, in this fourth embodiment, if we consider, for example, PI, P2, etc. to be rhythmic accents in music, the screen can be switched according to the accents, allowing for richly expressive playback. I can do it.

This fourth embodiment differs from the third embodiment in that the timing of the vertical synchronization signal of the video signal can be set independently, that is, the audio synchronization signal is recorded within the audio signal (EFM) itself. It has the characteristic that it is easy to understand the timing relationship between pictures and sounds when creating data.

FIG. 14 shows a reproduction configuring a fifth embodiment in which a moving image and a still image sequence are simultaneously displayed on multiple displays (in this case, a total of two screens, one moving image screen and one still image screen). FIG. 2 is a block diagram of the device.

The basic components of this fifth embodiment are the same as those in the moving picture playback mode of the first embodiment, that is, the block diagram of FIG.
', a field memory circuit 5', and a display 62. Here, the configuration of the mode control circuit 8' is the same as that of the mode control circuit 8, but since the output switching signal t is not necessary, its signal line is omitted.

In FIG. 14, the still image reproduction mode is set by the mode setting signal S' of the mode control circuit 8', and the control signal W'
, r' control the field memory circuit 5' to display a still image on the display 6'.

On the other hand, the mode control circuit 8 sets a moving image playback mode using the mode setting signal S, and controls the field memory circuit 5 using control signals w and r to display the moving image on the display 6.

FIG. 15 is a diagram for explaining the above operation and effects in an easy-to-understand manner. In this figure, for example, the left display 6 displays a video (in this case a picture of a moving train) corresponding to a karaoke song, and the right display 6' displays a still image of the lyrics corresponding to the karaoke song. It shows a process in which the still images are switched one after another as the song progresses. Although it is the same karaoke, the video display 6 displays scenery that matches the image of the song, while the still image display 6' displays still photos of the singer singing the song one after another, along with the lyrics. You can do it.

In this way, in this fifth embodiment, there are multiple screens corresponding to the same song, and the combinations of screens can be varied in various ways, making it possible to perform effective and attractive playback. .

In the fifth embodiment described above, the mode control circuit 8' has been explained using the same configuration as that shown in FIG. By replacing the control circuit 8Y or the mode control circuit 8Z in FIG. 13, it is possible to synchronize the video screen and the lyrics screen at a predetermined timing, or switch the lyrics screen roughly in accordance with the rhythm of the song. As a result, more attractive and effective playback can be expected.

In the examples shown in FIGS. 14 and 15 above, two screens are combined horizontally to form one meaningful screen. In addition, for example, two or more still image sequences may be recorded. By having one video screen and multiple still image screens that can be played simultaneously, effective playback can be achieved.

In the playback of these multiple screens, the above example describes the case where the displays are placed next to each other, but there is no need to be limited to this arrangement, and multiple displays may be placed separately. This makes it perfect as environmental music (environmental videos) for movies such as music.

FIG. 16 is a block diagram of a reproducing apparatus constituting a sixth embodiment that combines a moving image and a still image sequence and reproduces and displays the same on one display.

This sixth embodiment has the same structure as the overall structure of the fifth embodiment, that is, in the block diagram of FIG. This is realized by adding a superimpose circuit 10 for synthesizing either the output of the field memory circuit 5 or the direct output from the video processing circuit 3.

The operation shown in FIG. 16 is performed in the fifth embodiment, instead of displaying two screens (video and still image) that are played simultaneously in parallel on multiple (two) independent displays. It attempts to superimpose the screen and display it on a single display. The basic timing relationships of the signals in each part are the same as those in the embodiment shown in FIG. 5, so the explanation will be omitted.

FIG. 17 is a diagram for explaining the above operation and effects in an easy-to-understand manner. In this figure, 20 indicates a field signal sequence constituting the original video signal in which still image fields B are inserted at predetermined intervals into a moving image field sequence A, and 21 and 22 indicate.

The field sequences extracted from the field signal sequence 20 and frozen, ie, the output field sequence (still image) of the field memory circuit 5' in FIG. 16, and the output field sequence (moving image) of the switch circuit i9B in FIG. 16 are shown.

23 and 24 are virtual screens showing the contents of each of A and B, and these two virtual screens are combined into one screen by the superimpose circuit 10 shown in FIG. 16 and displayed on the display 6. In this case, screen A is a moving image screen in which the train continues to run, and screen B is a background still image screen that changes at predetermined time intervals.

In this way, in this sixth embodiment, there is only one screen corresponding to the same song, but even if there is only one type of video screen, still image sequences that should be the background can be displayed in multiple systems (multiple channels). ), by selecting and combining them, it becomes possible to reproduce in many ways, and because it is possible to have various kinds of variety, it is possible to carry out effective and attractive reproduction.

Further, in this sixth embodiment, the mode control circuit 8 is
By replacing the mode control circuit 8Y in FIG. 10 or the mode control circuit 8Z in FIG. 13, the background still image can be switched in synchronization with the audio as explained in the operation timing chart in FIG. 9 or 12. This makes it possible to perform more attractive playback.

In all of the embodiments described above, the field signal has been explained as a unit of reproduction, but by replacing the field signal with a frame signal, still image reproduction can be performed with even more precision. In this case, l
Since the frame corresponds to two fields, the specific control method will be slightly different, but this point is not related to the essence of this patent and will therefore be omitted.

Furthermore, in the embodiments described above, the intervals between the fields constituting the still image sequence are all constant.
For example, in the example shown in Fig. 5, the B field is interleaved every 10 fields at equal intervals. can be produced.

Further, although the above embodiment has been described as a laser disc playback device, the recording medium is not limited to a laser disc, and the device can be applied not only to a playback device but also to, for example, a video signal receiving device. Needless to say.

Effects of the Invention As described above, firstly, the video signal processing method of the present invention has a simple configuration, and even when the same audio is played over and over again, it can be used to specify a mode for video playback or for still playback. You can change the image by playing back in both rows.

Second, in the still image playback mode, it is possible to set the switching timing of still images in the still image sequence according to the content of the audio (according to the phrase or rhythm).

Thirdly, since it is possible to play back video and still images in parallel and at the same time for the same audio, it is possible to play back as environmental video music, or to match video and still images to one content, for example. The still image screen can also be played back as a screen dedicated to lyrics corresponding to the song.Fourthly, video and still images can be combined and played back on one screen, and multiple still images can be played back. Since you can prepare multiple channels and select and specify one of them, it is possible to play back virtually any number of combinations of videos. It is extremely useful.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the basic configuration of an apparatus for realizing the video signal processing method according to the first embodiment of the present invention, and FIG.
The figure is a block diagram showing the internal configuration of the field memory circuit in the same embodiment, and FIG. 3 is a block diagram showing the internal configuration of the mode control circuit which is a component in the same embodiment.
FIG. 4 is a time chart showing the basic operation of the mode control circuit, FIG. 5 is a time chart showing the operation of the still image playback mode in the first embodiment of the present invention, and FIG. FIG. 7 is a time chart for explaining the operation of the video playback mode in the first embodiment of the invention, FIG. 7 is a time chart for explaining the operation of the second embodiment of the invention, and FIG. A block diagram showing the internal configuration of the mode control circuit used in the second embodiment, FIG. 9 is a time chart for explaining the operation of the third embodiment of the present invention,
FIG. 10 is a block diagram showing the internal configuration of the mode control circuit used in the third embodiment of the present invention, and FIG. 11 is an explanation for explaining the position of the audio synchronization signal to be detected in the third embodiment of the present invention. 12 is a time chart for explaining the operation of the fourth embodiment of the present invention, and FIG. 13 is a block diagram showing the internal configuration of the mode control circuit used in the fourth embodiment of the present invention. FIG. 14 is a block diagram of the configuration for realizing the fifth embodiment of the present invention, FIG. 15 is an explanatory diagram for explaining the effect of the operation of the fifth embodiment of the present invention, and FIG. 16 is a block diagram of the structure of the fifth embodiment of the present invention. FIG. 17 is an explanatory diagram for explaining the effects of the operation of the sixth embodiment of the present invention. 1... Laser disk, 2... Signal detection circuit, 3
...Video processing circuit, 4...Audio processing circuit, 5...
field memory circuit, 6... display, 7... speaker, 8.8',
8X, 8Y, 8Z...mode control circuit, 9A, 9B...
...Switch circuit, 10.-Superimpose circuit. Name of agent: Patent attorney Toshio Nakao (1 person) Figure 2 Figure 3 λ L J Castle
-Gonji-Minefu Sause Fig. 8 2 @ 勺 G ``j ko 9 Fig. 10 8Y Fig. 13 Z / 8o'6'6 15th movement #!J Shizuka upper convex

Claims (18)

[Claims] (1) Extract frames at predetermined intervals from a frame sequence that makes up a video signal, insert frames that make up a series of still image sequences with contents independent of the video signal at the positions of the extracted frames, and playback. a still image playback mode in which only a frame string constituting the still image string is played back and displayed;
A video signal processing method characterized in that it is possible to select either a mode in which frames other than the frames constituting the still image sequence are played back and displayed, or a video playback mode in which a moving image is played back and displayed. (2) The video signal processing method according to claim 1, characterized in that a plurality of frame sequences constituting a series of still image sequences independent of the video signal are provided. (3) The video signal processing method according to claim 1 or 2, characterized in that when reproducing the frame position extracted in the video playback mode, the immediately preceding frame signal is replaced with a frozen signal in the frame memory and displayed. . (4) In the still image reproduction mode, each frame is frozen in the frame memory and reproduced as a still image sequence until the next frame signal arrives.
Or the video signal processing method according to 2. (5) The video signal processing method according to claim 4, wherein the timing of sequentially displaying the still images while frozen in the frame memory is delayed by a predetermined amount set in advance. (6) Extract frames at predetermined intervals from a frame sequence that constitutes a video signal, insert frames constituting a series of still image sequences with contents independent of the video signal at the positions of the extracted frames, and When reproducing a still image sequence, each frame is frozen as a still image in a frame memory, and the timing of switching and displaying the still images is determined by synchronization pulses corresponding to the content of audio information. Signal processing method. (7) The video signal processing method according to claim 6, characterized in that a plurality of frame sequences constituting a series of still image sequences independent of the video signal are provided. (8) The video signal processing method according to claim 6 or 7, characterized in that the synchronization pulse is generated from a subcode signal in an 8-14 modulation signal superimposed on a frame signal of the video signal. (9) The video according to claim 6 or 7, characterized in that the synchronization pulse is recorded in a vertical synchronization section located at a position corresponding to the content of audio information of the FM signal superimposed on the frame signal of the video signal. Signal processing method. (10) In a frame sequence that constitutes a video signal, frames are extracted at predetermined intervals, and frames that constitute a series of still images whose contents are independent of the video signal are inserted at the positions of the extracted frames. , two types of modes are provided: a still image playback mode in which only the frame strings making up the still image string are played back and displayed, and a mode in which frames other than the frames making up the still image string are played back and displayed, and the above two types are provided during playback. 1. A video signal processing method characterized by displaying a moving image and a still image sequence on independent display devices by simultaneously specifying the following modes. (11) Claim 1 characterized in that a plurality of frame sequences forming a series of still image sequences independent of the video signal are provided.
0. The video signal processing method according to 0. (12) Extracting frames at predetermined intervals from a frame sequence constituting a video signal, inserting frames constituting a series of still image sequences with contents independent of the video signal at the positions of the extracted frames, and Two types of modes are provided: a still image playback mode that plays back and displays only the frames that make up the still image string, and a video playback mode that plays and displays frames other than the frames that make up the still image string. A video signal processing method characterized in that a moving image and a still image sequence are superimposed and displayed on the same display device by simultaneously specifying the following modes. (13) It is possible to provide a plurality of frame sequences that constitute a series of still image sequences independent of the video signal, and to select one of the above still image frame sequences during playback and superimpose it with a moving image for playback. 13. The video signal processing method according to claim 12. (14) The video signal processing according to claim 12 or 13, characterized in that the still images of the superimposed still image sequence are displayed, and the switching timing is determined by a synchronization pulse corresponding to the content of the audio information. Method. (15) The video signal processing method according to claim 14, characterized in that the synchronization pulse is generated from a subcode signal of an 8-14 modulation signal superimposed on a frame signal of the video signal. (16) Claim 1 characterized in that the synchronization pulse is recorded in a vertical synchronization section located at a position corresponding to the content of audio information of the FM signal superimposed on the frame signal of the video signal.
4. The video signal processing method according to 4. (17) The video signal processing method according to any one of claims 1 to 16, characterized in that the intervals between frames constituting the still image sequence are set arbitrarily. (18) The video signal processing method according to any one of claims 1 to 17, characterized in that a frame, a frame sequence, a frame signal, and a frame memory are respectively replaced with a field, a field sequence, a field signal, and a field memory.