JPH11177934A - Reproduction method, reproduction device, recording and reproducing method and recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reproduce and output an optional video (moving image and still image) and an optional audio simultaneously. SOLUTION: Optional video data V and optional audio data A recorded at a different time from the video data V are selected from a recording medium 2 on which the video data and the audio data are recorded, they are reproduced by a same head 3 respectively and respective decoded signals are outputted simultaneously. Furthermore, the video data V are arranged to be a still image of one frame. Thus, an optional video (moving image and still image) and an optional audio are reproduced and outputted simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reproducing or recording and reproducing image data and audio data, and more particularly to a reproducing method for simultaneously reproducing an arbitrary image and an arbitrary sound.

[0002]

2. Description of the Related Art Conventionally, various devices have been proposed for encoding an image signal and an audio signal, respectively, and recording the encoded signals on a disk medium. Recorded above. Here, audio and video synchronization during playback (AV
Usually, time axis multiplexing is performed to facilitate synchronization.

[0003]

In this conventional system, certain audio data is set as certain image data, and an arbitrary image (moving image and still image) and an arbitrary audio are reproduced simultaneously. There was no concept.

An object of the present invention is to reproduce and output an arbitrary image (moving image and still image) and an arbitrary sound simultaneously.

[0005]

According to the present invention, arbitrary image data V and arbitrary audio data A are selected from a recording medium on which image data and audio data are recorded, and each is reproduced by the same head. It is configured to output each decoded signal simultaneously. Thus, an effect of simultaneously reproducing and outputting an arbitrary image (moving image and still image) and an arbitrary sound can be obtained.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, an arbitrary image data V and an arbitrary audio data A are selected from a recording medium on which image data and audio data are recorded, and the same is selected for each. , And outputs the respective decoded signals at the same time. The effect of reproducing and outputting an arbitrary image (moving image and still image) and an arbitrary sound simultaneously is obtained.

According to the second aspect of the present invention, the image data V is a still image of one frame, and a slide show effect of an arbitrary still image and an arbitrary sound can be obtained.

According to a third aspect of the present invention, the image data V is encoded by MPEG, and the transfer rate required for decoding is encoded at a variable rate that changes with time in GOP units. This has the effect of simultaneously reproducing and outputting an arbitrary image and an arbitrary sound encoded at a variable rate.

According to a fourth aspect of the present invention, audio data A is data in which only audio data is continuously recorded in a predetermined area of a recording medium without time-division multiplexing with image data. Thus, there is an effect that it is possible to use the audio data separately and additionally recorded only for the audio data.

According to a fifth aspect of the present invention, the position information of the selected image data V and audio data A on the recording medium is recorded on the recording medium as management information, and the management information is detected. Claim 1 shows the selected data as
In order to record the position information of arbitrary data V and A as management information on a recording medium, the same image and audio data are always paired at any time thereafter. The effect of being able to reproduce is obtained.

According to a sixth aspect of the present invention, there is provided a reproducing apparatus for reproducing image data and audio data from a recording medium by using the reproducing method according to any one of the first, second, third and fourth aspects. Thus, there is an effect that a reproducing apparatus that reproduces and outputs arbitrary images (moving images and still images) and arbitrary sounds simultaneously can be obtained.

According to a seventh aspect of the present invention, there is provided a recording / reproducing apparatus for reproducing image data and audio data from a recording medium using the recording / reproducing method according to the fifth aspect. Since the position information A and A are recorded on the recording medium as the management information, the same image and audio data can be reproduced simultaneously as a pair at any time thereafter.

According to an eighth aspect of the present invention, the recording medium is an optical disk.
3. A reproducing method, a recording / reproducing method, a reproducing apparatus, or a recording / reproducing apparatus according to any one of 3, 4, 5, 6, and 7, wherein an arbitrary image (moving image and still image) is formed using an optical disc.
And an arbitrary sound can be reproduced and output at the same time.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (Embodiment 1) FIG. 1 schematically shows a data array on a recording track of a recording medium, where V indicates image data, and A indicates audio data.

In FIG. 1, streams 1 indicated by V and A are recorded in a and b of FIG.
To d are stream 2, e to f are stream 3,
Streams 4 are recorded from g to h, and stream 5 is recorded from i to j.

Here, stream 1 and stream 5 are ordinary streams in which image data and audio data are multiplexed on the time axis, stream 3 is still picture data,
In streams 2 and 4, only audio data is recorded.

In the embodiment of the present invention, image data and audio data are arbitrarily and independently selected and simultaneously reproduced. Therefore, the present embodiment is based on the following three reproduction examples. The form will be described.

First, as a first reproduction example, stream 3
When playing back the still image and the sound of stream 1 at the same time,
As shown in FIG. 1, the starting point of the image data is e,
The start point of the audio data is set to a.

As a second reproduction example, in the case of simultaneously reproducing the image of stream 1 and the audio of stream 4, FIG.
As shown in (1), the start point of the image data is a and the start point of the audio data is g.

Similarly, as a third reproduction example, stream 1
In the case of simultaneously reproducing the image and the audio of the stream 5, the start point of the image data is set to a and the start point of the audio data is set to i.

In order to realize these, it is necessary for the drive of the optical disk to access the reproducing head at high speed. In the case of the above-described first reproduction example, an operation that is not so different from that of a normal case is possible. A reproduction operation of about 1.5 times is required. In the third reproduction example, since the reproduction of the stream 1 and the stream 5 is performed in real time, the reproduction operation is further severed, and the reproduction operation of about 2 to 3 times is required.

In the third reproduction example, when the streams 1 and 5 are encoded at a fixed rate such as JPEG, the reproduction operation may be performed at a predetermined fixed rate required for decoding. However, in the case of variable-rate coding in which the transfer rate changes every GOP in accordance with MPEG encoding and the transfer rate changes every GOP, the playback operation is performed at a rate twice to three times the maximum rate that variable-rate coding can take. The operation is required, and the reproduction of the streams 1 and 5 will be described later with reference to FIG.
The device shown in is required.

Here, the reproduction start point does not need to coincide with the start point of the stream. For example, an arbitrary point m in the stream 1 or an arbitrary point n in the stream 2 may be used.

By recording on the optical disk the position information of the start point or the start point and the end point of the image and sound to be reproduced simultaneously as management information, the image and sound can be simultaneously reproduced from the same point at any time thereafter. Becomes possible.

FIG. 2 is a block diagram for realizing simultaneous reproduction according to the present embodiment. In FIG. 2, image data V and audio data A on an optical disk 2 set in a drive 1 are reproduced by a reproducing head 3, and a reproducing circuit 4 obtains image and audio data. The image data V passes through the V memory 5 and is decoded by the video decoder 6 to be output as an image signal. The audio data A is decoded by the audio decoder 8 via the A memory 7, and is output as an audio signal. By simultaneously outputting them, simultaneous output of image data V and audio data A is obtained.

A control circuit 9 controls the drive 1 and the reproducing head 3 based on the information in the V memory 5 and the A memory 7.

FIG. 3 schematically shows data reproduction timing and decoded signal output timing when the still image data and audio data shown in the first reproduction example are selected.

The timing of image data reproduction and the amount of data stored in the V memory, the timing of audio data reproduction and the amount of data stored in the A memory, the output timing of image decoded signals, and the output timing of audio decoded signals are shown. Since it is still image data,
It can be seen that the image data need only be read out first, and the drive operation does not need to be very fast.

FIG. 4 schematically shows the reproduction timing and the decoded signal output timing when the image of stream 1 and the audio data of stream 5 are simultaneously output in the third reproduction example. 3 is the same as FIG. 3, but also in FIG. 4, both the image data and the audio data are reproduced intermittently so that the memory does not become empty. As the audio data, after reproducing the entire stream 5, the audio data may be selected and decoded at the time of decoding. In this case, it is necessary to reproduce all two streams. Alternatively, only audio data may be selected and reproduced. FIG. 4 schematically shows the timing of a certain section of the audio data.

Further, in the case where the streams 1 and 5 are encoded by MPEG, and in the case of variable rate encoding in which the transfer rate changes every GOP, the location of the audio data in the stream 5 is not fixed. However, it is difficult to selectively reproduce only audio data. In this case, all streams 1 and 5 are reproduced. The playback operation is approximately twice to three times the maximum rate that variable rate coding can take.
Double playback operation is required, and stream 1,
It is understood that the role of a control circuit that determines the reproduction operation based on the remaining amount of the V or A memory is important for the reproduction of 5, and that the drive operation requires a considerably high speed.

Here, as shown in stream 2 or stream 4 in FIG. 1, only audio data may be continuously recorded in a predetermined recording area. This has an effect that it is easy to manage an area where audio data is recorded when a process of separately recording audio data, for example, after-recording processing is performed.

The second reproduction example, that is, the simultaneous reproduction of the image of stream 1 and the audio of stream 4, can be performed in the same manner as in the third reproduction example. That is, while reproducing the image data of stream 1, the audio data of stream 4 may be reproduced before the amount of data stored in the V memory is exhausted. In this case, when the amount of data stored in the V memory is very large, the access of the reproducing head can be reduced by continuously reproducing and storing the audio data of the stream 4.

The image data may be any one frame of still image data in the moving image stream.

Also, a plurality of sets of simultaneous reproduction of image and audio data are selected, and a plurality of sets are continuously reproduced, or a plurality of still images are connected to be continuously reproduced in a slide show. Is also possible.

Further, as the start position information of the image and audio data to be recorded in the management information, the address information of the sector is desirable.

Also, by having a plurality of audio signal processing systems and outputting a plurality of audio streams independently or by multiplexing a plurality of audio streams, an audio multiplexing effect can be obtained.

Further, the recording medium is not limited to the optical disk, and it goes without saying that the same effect can be obtained by using a magneto-optical disk, a magnetic disk, or a semiconductor memory.

[0038]

As described above, according to the present invention, an arbitrary image data V and an arbitrary audio data A recorded at a different time from the image data V can be recorded on the recording medium on which the image data and the audio data are recorded. Is selected and reproduced by the same head, and respective decoded signals are simultaneously output. This makes it possible to simultaneously reproduce and output an arbitrary image (moving image and still image) and an arbitrary sound. Is obtained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a data array on a recording track.

FIG. 2 is a configuration block diagram of an embodiment of the present invention.

FIG. 3 is a timing chart of the first reproduction example.

FIG. 4 is a timing chart of the third reproduction example.

[Explanation of symbols]

 Reference Signs List 1 drive 2 optical disk 3 reproducing head 4 reproducing circuit 5 V memory 6 video decoder 7 A memory 8 audio decoder 9 control circuit

Claims (8)

[Claims] An image data V and an image data V are recorded on a recording medium on which image data and audio data are recorded.
A reproducing method characterized in that arbitrary audio data A recorded at different times from the above are selected, reproduced with the same head, and respective decoded signals are simultaneously output. 2. The reproducing method according to claim 1, wherein the image data V is a one-frame still image. 3. The image data V is encoded by MPEG, and the transfer rate required for decoding is encoded at a variable rate that changes with time in GOP units. Item 2. The reproduction method according to Item 1. 4. The reproduction according to claim 1, wherein the audio data A is data in which only audio data is continuously recorded in a predetermined area of a recording medium without time-division multiplexing with image data. Method. 5. The method according to claim 1, wherein position information of the selected image data V and audio data A on the recording medium is recorded on the recording medium as management information, and the selected data is detected by detecting the management information. A recording / reproducing method characterized by reproducing by the reproducing method described in any one of 2, 3, and 4. 6. A reproducing apparatus for reproducing image data and audio data from a recording medium by using the reproducing method according to claim 1. 7. A recording and reproducing apparatus for reproducing image data and audio data from a recording medium by using the recording and reproducing method according to claim 5. 8. A reproducing method, a recording / reproducing method, a reproducing apparatus, or a recording / reproducing apparatus according to claim 1, wherein the recording medium is an optical disk.