JPH11177910A - Reproduction method and reproduction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simultaneous output of plural different images or plural audio data. SOLUTION: One or plural streams recorded on a record medium 2 are reproduced by one reproduction head 3, plural signals are decoded (13) simultaneously and plural different image reproduction signals or plural different audio reproduction signals are outputted simultaneously. Thus, plural different images or plural audio signals are reproduced from the record medium 2 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 image data and audio data, and more particularly to a method and apparatus for reproducing and outputting different images and sounds simultaneously.

[0002]

2. Description of the Related Art Conventionally, various methods and apparatuses have been proposed as methods and apparatuses for reproducing, decoding and outputting image data and audio data on a recording medium, respectively. A data stream, that is, one stream is reproduced and decoded to obtain a reproduced signal output of one image and sound.

[0003]

In this conventional system, of course, only one image and one sound can be reproduced simultaneously.

An object of the present invention is to simultaneously output a plurality of different images or a plurality of sounds.

[0005]

According to the present invention, one or a plurality of streams recorded on one recording medium are reproduced by one reproducing head, and after a decoding process is performed, a plurality of different images are reproduced. A plurality of reproduction signals or audio reproduction signals are simultaneously output. This makes it possible to simultaneously output a plurality of different images or a plurality of sounds.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is characterized in that a video data sequence, an audio data sequence, or a pair of an audio data sequence related to an image data sequence is formed into one stream, respectively. One or a plurality of streams recorded on one recording medium are reproduced by one reproduction head, and after performing a decoding process, a plurality of different reproduction signals are output simultaneously, and a plurality of different images are output. Or a plurality of sounds can be output simultaneously.

According to a second aspect of the present invention, the plurality of streams are two arbitrary streams on a recording medium, and simultaneously output two different image and audio reproduction signals. An effect is obtained that a plurality of different images or a plurality of sounds can be output simultaneously.

In the invention according to claim 3 of the present invention, the plurality of streams are two arbitrary streams on a recording medium, one stream is still picture data, and one stream is moving picture data with sound. Thus, it is possible to simultaneously output the reproduction signals of the still image and the moving image with sound.

According to a fourth aspect of the present invention, the still image data is a reduced screen obtained by reducing one screen in a moving image,
It is characterized in that a plurality of reduced screens are simultaneously displayed in one frame in a plurality of frames, and an effect is obtained that a plurality of reduced images are always output as still images and a moving image can be output simultaneously.

According to a fifth aspect of the present invention, the plurality of streams are two streams having time information related to each other, and two different image signals and one audio signal are output simultaneously. Thus, an effect is obtained that two different reproduced images having time information related to each other can be simultaneously output.

According to a sixth aspect of the present invention, the plurality of streams are similar to a multi-angle stream of a DVD, and the streams are reproduced and two different image signals and one audio signal are simultaneously reproduced. By outputting
The effect is obtained that a plurality of different images can be output simultaneously.

[0012] According to a seventh aspect of the present invention, a reproduced signal of two streams is converted into information of one stream by a left eye,
By outputting the information of the other stream mainly so as to make the right eye visually recognize the three-dimensional image, an effect that the three-dimensional image can be made visible is obtained.

According to an eighth aspect of the present invention, the stream comprises a plurality of audio streams having common time information, and outputs two different audio signals and a common image signal simultaneously. Accordingly, an effect that two different audio signals can be heard simultaneously can be obtained.

According to the ninth aspect of the present invention, the stream reproduced from the recording medium is one stream of wide aspect image data, and in the decoding process, the first decoding process performs normal decoding and performs wide aspect The second decoding process is to output after performing an aspect conversion by letterbox, and to output these two reproduced signals at the same time. It is possible to output a plurality of images having different aspects at the same time. The effect of being possible is obtained.

According to a tenth aspect of the present invention, a stream reproduced from a recording medium is one stream,
In the decoding process, the first decoding process outputs a normal signal form, that is, an interlaced image, and the second decoding process converts and outputs a non-interlaced image in which the number of scanning lines is almost twice the number of the interlaced image. There is an effect that a plurality of images having different scanning lines can be output simultaneously.

According to an eleventh aspect of the present invention, the stream reproduced from the recording medium is one stream,
In the decoding process, a first decoding process performs a normal decoding and outputs a normal output form, that is, an output of switching to a next image to be displayed when it is decoded, and a second decoding process performs a decoding of the decoded image. A display image is selected from among them, and only the selected image is output and displayed multiple times.A plurality of images with different time intervals, that is, a normal display frame and a thinned display frame, are simultaneously output. Is obtained.

According to a twelfth aspect of the present invention, the stream is a stream at the time of trick play of high-speed transmission and return, and is a stream substantially based on intra-frame encoded data, and is thinned out from a normal display frame. Thus, it is possible to simultaneously output a plurality of images having different time intervals such as displayed frames.

According to a thirteenth aspect of the present invention, a plurality of different image reproduction signals are output as a single reproduction signal after being synthesized so as to be displayed on the left and right of one screen, thereby providing a plurality of different image reproduction signals. Can be displayed on a single television.

According to a fourteenth aspect of the present invention, a reproducing method according to any one of the first to thirteenth aspects is used.
It reproduces image data and audio data from a recording medium, and has an effect of obtaining a reproduction device capable of simultaneously outputting a plurality of different images or a plurality of sounds.

The invention according to claims 15 and 16 of the present invention is characterized in that the recording medium is an optical disk and the reproducing method according to any one of claims 1 to 13, and the reproducing method according to claim 14. The device is capable of simultaneously outputting a plurality of different images or a plurality of sounds.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram showing a configuration of Embodiment 1 of the present invention, and shows a case where one stream is reproduced from a recording medium.

In FIG. 1, a signal reproduced by a reproducing head 3 from an optical disk 2 driven by a drive 1 is:
The data is reproduced by the reproduction circuit 4 and stored in the memory 5. The output of the memory 5 is supplied to two video decoders 6 and 8 of the decoder unit 13 and two audio decoders 7 and 9. Each decoder performs decoding based on a command from the control circuit 10 and outputs the result.

The operation of the first embodiment thus configured will be described. Now, the stream reproduced from the recording medium is a data stream of a wide aspect image. In this case, the image decoding output is output in the wide aspect as it is when a wide aspect display device such as a wide TV is connected to the subsequent stage, and when the normal aspect display device such as a standard TV is connected to the subsequent stage. , The decoded image is subjected to letterbox conversion, or pan-scan conversion for cutting out partial left and right images, and output. Conventionally, either aspect has been selected.

According to the present invention, the video decoder 6 can output in wide aspect as it is, and the video decoder 8 can output after letterbox conversion.
Playback images can be enjoyed simultaneously on displays of different aspects.

Although two audio decoders 7 and 9 are separately provided corresponding to the video decoders 6 and 8,
One is acceptable.

Next, the stream reproduced from the recording medium is a normal MPEG2 stream.

In a video decoder, a decoded reproduction output is usually output as an interlaced image, that is, as a 525i image in NTSC. However, by doubling the number of scanning lines, a fine-grained image can be provided. This is converted into a so-called non-interlaced image 525p and output. In this case, of course, the display device must support the non-interlaced image 525p.

In this case, the video decoder 6 can output the image as it is at 525i, and the video decoder 8 can convert it to a non-interlaced image 525p and output it. You can enjoy at the same time. This has the great effect that a non-interlaced large screen screen and a normal television can be displayed simultaneously. In this case, one audio decoder is sufficient.

Next, the stream to be reproduced from the recording medium is a stream for special reproduction.

In fast-forward and high-speed return, only intra-frame encoded data is discretely reproduced from the optical disk. These discrete frames are represented by F1, F2, F3,
Assuming that F4 and F5 are used, in the normal high-speed reproduction, the same frame is displayed until the next frame is decoded. For example, in the video decoder 6, F1, F1, F2, F2, F
Decoded and displayed as 3, F3, F4, F4, F5, F5.

However, if the number of times the same frame is displayed is reduced, the display time is shortened, making it difficult to see. In other words, if high-speed playback images with the same number of display times of the same frame are displayed at the same time, the user sees the one that is easier to see, and the high-speed playback becomes extremely easy to see.

In this case, the video decoder 8 selects a display image, and in the above example, F1, F1, F1,
F1, F3, F3, F3, F3, F5, F5, F5, F
By reproducing and displaying the same frame as 5 times as long as
It is possible to provide a high-speed playback image that is easily viewed. However, the time interval between display frames is doubled. In order to view these two high-speed playback images on the same television, it is preferable that the two high-speed reproduction images be simultaneously displayed on the left and right sides of a wide television capable of inputting two images. As a result, the user sees the one that is easy to see, and the high-speed reproduction becomes extremely easy to see.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIG.

FIG. 2 is a configuration block diagram of the second embodiment, and shows a case where two streams are reproduced from a recording medium.

A signal reproduced by the reproducing head 3 from the optical disk 2 which is a recording medium driven by the drive 1 is:
The data is reproduced by the reproduction circuit 4 and stored in the memory 5 and the memory 11. The output of the memory 5 is supplied to a video decoder 6 and an audio decoder 7, and the output of the memory 11 is also supplied to a video decoder 8 and an audio decoder 9. Each of the decoders 6, 7, 8, and 9 performs decoding based on a command from the control circuit 10 and outputs the result.

The operation of the second embodiment configured as described above will be described. Now play from the recording medium 2
One stream is assumed to be two streams having mutually related time information. This is a type in which a plurality of streams of a plurality of image signals at the same time and a plurality of streams of audio signals at the same time are recorded in a time-division multiplex manner, and are known as, for example, a DVD multi-angle stream.

A schematic diagram of the data arrangement on the recording track of this stream is shown in stream 4 and stream 5 shown in FIG. In FIG. 3, image data is represented by V, and audio data is represented by A. Streams 1 and 3 are moving image streams, and stream 2 is a still image stream. Streams 4 and 5 are multi-angle streams.

The multi-angle streams 4 and 5 are independently decoded and output. That is, stream 4
Are stored in the memory 5 and decoded by the video decoder 6. On the other hand, the data of stream 5 is stored in memory 1
1 and is decoded by the video decoder 8.

The control of capturing the stream into the memory is as follows.
It goes without saying that the control circuit 10 performs this operation. The respective decoded signals are output simultaneously at the same time.

Here, the stereoscopic image data is recorded in each stream, and the information of the decoded signal of one stream is mainly viewed by the left eye and the information of the other stream is mainly viewed by the right eye. Can be visualized.

In this case, regarding the method of mainly viewing the information of one stream to the left eye and the information of the other stream to the right eye, a method using shutter glasses linked to a display, or a method of changing the polarization of light is used. Although there are various methods and the like used, description is omitted because they are known. The description of the stereoscopic image data itself is also omitted.

Next, it is assumed that the two streams reproduced from the recording medium are a still image data stream and a moving image data stream. Stream 2 and stream 1 in the schematic diagram of FIG. 3 are reproduced.

The moving image data stream 1 is stored in the memory 5 and decoded by the video decoder 6. On the other hand, the still image data stream 2 is stored in the memory 11 and decoded by the video decoder 8.

Here, as the still image data, a menu screen showing a title of a moving image or the like can be considered. in this case,
The user can enjoy the moving image while viewing and selecting the menu.

As still image data, reduced screen still image data which is a reduced screen obtained by reducing one screen in a moving image, and in which a plurality of the reduced screens are simultaneously displayed in one frame, can be considered. This reduced screen is representative of the moving images before and after the screen, and functions as a kind of title menu in which the moving image scenes before and after the screen are reproduced by selecting an arbitrary reduced screen. .

Thus, the user can enjoy the moving image while viewing and selecting the menu shown on the reduced screen.

Further, an arbitrary one frame in a moving image may be continuously displayed as a still image output signal.

Next, the two streams reproduced from the recording medium are two streams having time information related to each other, that is, one moving image data and two audio data streams.

It is well known that a plurality of audio streams are recognized in DVD audio, such as Japanese and English. Conventionally, one of the audio streams is selected and decoded. In the present embodiment, the audio data of the stream 1 is decoded by the audio decoder 7 and the audio data of the stream 2 is decoded by the audio decoder 9. At the same time, multilingual output is possible. In this case, one video decoder is sufficient.

Here, an example in which two different image decoding signals are output has been described. However, this may be displayed on separate televisions, or connected to a wide-screen television or the like capable of inputting two images, and As a function, two screens may be displayed simultaneously on one screen.

Also, as in the synthesizing circuit 12 of FIG. 2, two image signals are synthesized so as to be displayed on the left and right of one screen, and
It may be configured to output as one image signal. This combining circuit 12 may be added to FIG.

Also, as shown in FIGS. 1 and 2, it is not necessary to provide two video decoders and two audio decoders.
It is also possible to substitute a frame memory for the video decoder.

A reproducing apparatus for realizing the above-described reproducing method does not fall outside the scope of the present invention.

The recording medium is not limited to an optical disk, but the same applies to a magneto-optical disk, a magnetic disk, and a semiconductor memory.

[0055]

As described above, according to the present invention, one or a plurality of streams recorded on one recording medium are reproduced by one reproducing head, and a plurality of different streams are reproduced. A plurality of image reproduction signals or a plurality of different audio reproduction signals are simultaneously output. As a result, it is possible to simultaneously output a plurality of different images or a plurality of sounds.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a first embodiment of the present invention.

FIG. 2 is a configuration block diagram according to a second embodiment of the present invention;

FIG. 3 is a schematic diagram of a data array on a recording track.

[Explanation of symbols]

 Reference Signs List 1 drive 2 optical disk 3 reproducing head 4 reproducing circuit 5 memory 6,8 video decoder 7,9 audio decoder 10 control circuit 11 memory 12 synthesizing circuit

Claims (16)

[Claims] An image data stream, an audio data stream, or a pair of an audio data stream associated with an image data stream, when each stream is one stream, one or a plurality of streams recorded on one recording medium. A reproduction method comprising: reproducing a stream with one reproduction head; performing a decoding process; and simultaneously outputting a plurality of different image reproduction signals or a plurality of different audio reproduction signals. 2. The method according to claim 1, wherein the plurality of streams are any two streams on a recording medium, and simultaneously output two different images or two different audio reproduction signals. Playback method. 3. The plurality of streams are arbitrary two streams on a recording medium, one stream is still image data, one stream is audio-attached moving image data,
The reproduction method according to claim 1, wherein reproduction signals of one still image and a moving image with sound are simultaneously output. 4. The reproducing method according to claim 3, wherein the still image data is a reduced screen obtained by reducing one screen in a moving image, and the plurality of reduced screens are simultaneously displayed on a plurality of screens in one frame. . 5. The reproduction according to claim 1, wherein the plurality of streams are two streams having time information related to each other, and simultaneously output two different image signals and one audio signal. Method. 6. The reproducing method according to claim 5, wherein the plurality of streams are similar to a DVD multi-angle stream. 7. The three-dimensional image is visually recognized by mainly viewing the reproduced signals of the two streams with the left eye for one stream information and the right eye for the other one stream information. The reproduction method according to claim 6. 8. The reproduction according to claim 1, wherein the stream has a plurality of audio streams having common time information, and outputs two different audio signals and one common image signal simultaneously. Method. 9. A stream reproduced from a recording medium is one stream of wide-aspect image data. In a decoding process, a first decoding process performs a normal decoding and outputs the wide-aspect image, and a second decoding process. 2. The reproducing method according to claim 1, wherein the output is performed after performing an aspect conversion by a letter box, and the two reproduced signals are simultaneously output. 10. A stream reproduced from a recording medium is one stream. In a decoding process, a first decoding process is output as a normal signal form, that is, an interlaced image. 2. The reproducing method according to claim 1, wherein the non-interlaced image is converted to a non-interlaced image which is almost double the interlaced image and output. 11. A stream to be reproduced from a recording medium is one stream. In a decoding process, a first decoding process performs a normal decoding and performs a normal output, that is, if an image to be displayed next is decoded. 2. The reproduction according to claim 1, wherein the output is switched to the selected image, and the second decoding process selects a display image from the decoded images, and outputs the selected image for output plural times. Method. 12. The stream according to claim 11, wherein the stream is a stream at the time of trick play of high-speed transmission and return, and is a stream substantially based on intra-frame encoded data.
The playback method described. 13. A reproduction signal according to claim 1, wherein two different image reproduction signals are combined so as to be displayed on the left and right of one screen and then output as one reproduction signal.
The reproducing method according to any one of 4, 5, 6, 7, 11, and 12. 14. A reproducing apparatus for reproducing and outputting image data and audio data from a recording medium by using the reproducing method according to claim 1. Description: 15. The reproducing method according to claim 1, wherein the recording medium is an optical disk. 16. The reproducing apparatus according to claim 14, wherein the recording medium is an optical disk.