KR100276786B1 - Information recording medium and playback device - Google Patents

Abstract

Change-rich reproduction is realized from data recorded in multiple channels.

In the recording medium 1, TOC information is recorded at its starting point, followed by information of the tracks 1 to 5. In each track, video data, audio data, and superimpose data are recorded in multi-channel and time division multiplexing systems, respectively. As one of the TOC information or in the header portion of each block of video data, audio data, and superimpose data, a default value relating to the synthesis method of multiple channels is recorded.

Description

Information recording medium and playback device

1 is a block diagram showing the configuration of one embodiment of an information reproducing apparatus according to the present invention;

FIG. 2 is a diagram for explaining the information recording medium format of the embodiment of FIG.

FIG. 3 is a diagram showing another example of the disk format of the FIG. 1 embodiment. FIG.

4 is a flowchart for explaining the synthesis method determination method of the FIG. 1 embodiment.

5 is a block diagram showing the configuration of another embodiment of an information reproducing apparatus according to the present invention;

6 is a flowchart for explaining the synthesis method determination method of the FIG. 5 embodiment.

* Explanation of symbols for main parts of the drawings

1: disc 3: decoder

4 to 7: decoder 8,8a to 8c: audio decoder

9,9a to 9c: video decoder 10,10a to 10c: data decoder

11, 12: synthesizer 21 to 23: switch

The present invention relates to an information recording medium suitable for use in recording and reproducing information, such as a compact disc, a video disc, a magneto-optical disc, and the like, and a reproduction apparatus thereof.

Conventionally, optical video discs record video signals of one channel and audio signals of two or four channels. Among them, two channels are recorded as FM audio signals and two channels as PCM audio signals, respectively. During playback, video signals and FM audio signals are reproduced, or video signals and PCM audio signals are reproduced.

In the conventional video disc, since only one channel of video signal is recorded, there is a problem that an image rich in change cannot be reproduced.

In addition, a problem in which only one of the FM audio signal and the PCM audio signal is selected, one channel of the selected audio signal is muted, or the two channels are combined and output as a mono sound signal can be given. There was.

This invention is made | formed in view of such a problem, and is made possible to play | play with more change.

The information recording medium of the present invention is characterized in that a default synthesizing method of a plurality of channels is recorded as TOC information at the start of the information recording medium or as control information in the header portion of the track.

The information reproducing apparatus of the present invention further includes decoding means for demodulating digital information of a plurality of channels in each channel, synthesizing means for synthesizing information of each channel decoded by the decoding means, and synthesizing means for each channel synthesis method. And changing means for changing to a different synthesis method.

The decoding means of the embodiment is constituted by the decoders 5, 6 and 7, the audio decoder 8, the video decoder 9 and the data decoder 10, and the synthesizing means is constituted by the synthesizers 11 and 12. The means is constituted by a controller 13 and an input unit 14.

In the information recording medium having the above-described configuration, a default synthesis method of a plurality of channels is recorded in the header of the track or the start point of the information recording medium. Therefore, according to this default synthesis method, digital information of a plurality of channels can be reproduced in accordance with a predetermined pattern which is set in advance, and the pattern can be changed as necessary to perform reproduction rich in change.

In the information reproducing apparatus of the present invention, the synthesizing method of each channel of the synthesizing means may be a default synthesizing method recorded on the information recording medium, or may be a synthesizing method changed by the changing means. Therefore, the image may be reproduced according to a preset pattern, or may be reproduced in a pattern different from the predetermined pattern from the beginning.

1 is a block diagram showing the configuration of one embodiment of an information reproducing apparatus according to the present invention. The disk 1 is driven by the drive 2 so that the reproduction signal is supplied to the decoder 3. The output of the decoder 3 is supplied to the decoder 4. Audio data, video data, and superimpose data are digitally recorded on the disc 1, and the decoder 4 separates these three data and supplies them to the decoders 5-7.

The decoder 5 separates the input audio data into three pieces of audio data and supplies them to the audio decoders 8a to 8c, respectively. The outputs of the audio decoders 8a to 8c are supplied to the synthesizer 11. The decoder 6 also separates the input video data into three channels of video data and supplies them to the video decoders 9a to 9c. The output of the video decoders 9a to 9c is supplied to the synthesizer 12. The decoder 7 divides the input superimposition data into three channels of superimposition data and supplies them to the data decoders 10a to 10c. The data and the outputs of the decoders 10a to 10c are supplied to the synthesizer 12.

The controller 13 controls the decoder 3, the decoders 4 to 7, the decoders 8 to 10, and the synthesizers 11 and 12, respectively, and is supplied with their output signals. The input unit 14 formed of a keyboard, a remote control device, or the like is used when inputting a predetermined command to the controller 13. The display 15 displays a display corresponding to the command from the input unit 14.

2 shows the format of the disc 1. TOC information is recorded at the start point (innermost track) of the disc 1, followed by five information in the tracks 1 (information 1) to 5 (information 5) in this embodiment. It is. Thus, in each track 1 to 5, video data V, audio data A and superimpose data S are recorded in time division multiplexing. Again, video data is recorded in a time division multiple manner in which data of N channels (e.g., three channels) is recorded. Similarly, in the case of audio data, data of M channels (for example, 3 channels) is recorded in a time division multiplexing method. Although not shown in the figure, superimposed data is also recorded in time-division multiplexing data of P-channels (for example, three channels).

As TOC information, information including the reproduction time and the address positions of the start and end points of the tracks 1 to 5 are recorded. In each track, a default value of a data synthesis method of multiple channels is recorded. For example, this synthesis method displays an image of channel 0 as a background, and displays an image of channel 1 and channel 2 in the form of a picture in picture on the upper left and lower right of the screen. In this case, only a picture of a predetermined channel is selected or a method of obtaining a desired picture is instructed.

In addition, this default synthesis method can be recorded in the header portion of each block of video, audio, or superimpose of each track, as shown in FIG. That is, in this embodiment, video synthesizing command data and audio synthesizing command data are recorded in each of the header portion of the video block for recording the N-channel video data and the header portion of the audio block for recording the M-channel audio data. Although not shown, the composite command data can be recorded in the header portion of the superimpose data block.

Next, the operation of the first embodiment will be described. When the disk 1 is mounted in the drive 2, the drive 2 reproduces the TOC information in the disk 1 and outputs it to the decoder 3. The decoder 3 reads the TOC information of the disk 1 and outputs it to the controller 13.

When the play command is inputted by operating the input unit 14, the drive 2 starts playing the disc 1. The decoder 3 supplies the decoder 4 with data reproduced in each track. The decoder 4 separates the input data into audio data, video data or superimposition data, and supplies them to the decoders 5 to 7, respectively. The decoder 5 selectively separates three channels of the input audio data and supplies them to the audio decoders 8a to 8c, respectively. The audio decoders 8a to 8c decode the input audio data and output the decoded audio data to the synthesizer 11. Thereby, the audio data of 3 channel shares is input into the synthesizer 11.

On the other hand, the decoder 6 separates the input video data into three channels of data and supplies them to the video decoders 9a to 9c, respectively. The video decoders 9a to 9c decode the input video data and output the decoded video data to the synthesizer 12. Similarly, the decoder 7 divides the input superimposition data into three channels of data and supplies the data to the data decoders 10a to 10c. The data decoders 10a to 10c decode the input superimposed data and output the decoded data to the synthesizer 12. Accordingly, the synthesizer 12 receives three channels of video data and three channels of superimpose data.

The synthesizers 11 and 12 synthesize audio data or synthesize video data and superimpose data according to the synthesis method specified by the controller 13, and output them. The controller 13 determines this synthesis method according to the flowchart shown in FIG.

That is, the presence or absence of the synthesis instruction change information is first determined in step S1. If it is determined in step S1 that there is synthesis instruction change information, the flow advances to step S2 to determine whether the instruction is by user specification. That is, when the user operates the input unit 14 to specify the synthesis method of each channel, the controller 13 proceeds to step S4, and this designation is preferentially selected. In other words, the synthesizers 11 and 12 perform synthesis in accordance with the designation input from the input unit 14.

If it is determined in step S2 that the synthesis method is not specified by the user, the flow advances to step S3 to determine whether the synthesis method designation command is included in the TOC information. The controller 13 judges the presence or absence of the change information from the TOC information supplied from the decoder 3, and if it is determined that there is synthesis method change information, the controller 13 proceeds to step S5 and synthesizes the synthesis method specified by the TOC information. 11 and 12).

If it is determined in step S3 that the synthesis method change information is not included in the TOC information, the flow proceeds to step S6. In this case, since the synthesis method is designated in each track as shown in Fig. 3, the synthesis method of the synthesizers 11 and 12 is set in accordance with this designation.

That is, the synthesis method has priority over the one specified by the user. If the synthesis method is not supported by the user, the synthesis method is set in the order of the TOC information, followed by the track information.

FIG. 5 is a block diagram showing the configuration of an embodiment other than the information reproducing apparatus of the present invention, in which portions corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, decoders 8 to 10 of audio, video and superimposition data are provided for only one channel, respectively, and one of three channels of data output by decoders 5 to 7 is switched to 21 to 21. 23 is supplied to the respective decoders 8 to 10. The other structure is the same as that of FIG.

In this embodiment, since each decoder of audio video and superimposition data is provided for only one channel, the switches 21 to 23 of the three channels of data output by each decoder 5 to 7 are provided. By the way, one channel of data is selected and supplied to each decoder 8 to 10. In other words, the switches 21 to 23 function as a kind of synthesizer.

In this embodiment, the controller 13 determines the synthesis method in accordance with the flowchart as shown in FIG. That is, in step S11, it is determined whether there is synthesis method change information, and when it is determined that there is synthesis method change information, the flow advances to step S12 to determine whether or not the synthesis method is designated by the user via the input unit 14. If the predetermined synthesis method is designated by the user, the flow advances to step S13 to select the specified synthesis method. At this time, the controller 13 controls the switches 21 to 23 and the synthesizers 11 and 12 according to a user's designation.

If it is determined in step S12 that no synthesis method has been specified by the user, the flow advances to step S14 to select a channel designated as to be processed most preferentially, and predetermined synthesis is performed only on that channel. This priority channel designation is previously recorded as TOC information or control information in the header portion of each track block.

The controller 13 can read these information at the output of the decoder 3 or at the outputs of the decoders 5 to 7.

As described above, according to the medium of the information device of the present invention, the default synthesis method of a plurality of channels can be recorded at the start point or track of the information recording medium, and the synthesis method can be quickly and surely realized according to a predetermined pattern. Therefore, the pattern can be converted as needed to reproduce the change-richly.

In addition, according to the information reproducing apparatus of the present invention, the synthesis method can be changed as necessary by synthesizing the information of the respective channels according to the default synthesis method previously recorded on the information recording medium, so that the rich reproduction can be performed. .

Claims (2)

An information recording medium having a track in which multiple channels of digital information are recorded, wherein the multiple channels of digital information are video data, audio data, and superimposed data, time-division multiplexed into blocks, and the information recording medium. And a synthesis method of a synthesizer of video and audio of digital information of the plurality of channel video data, audio data, and superimposition data is recorded in a TOC. An information recording medium having a track in which multiple channels of digital information are recorded, wherein the multiple channels of digital information are video data, audio data, and superimposed data, time-division multiplexed into blocks, and the information recording medium. And a method of synthesizing a video and audio synthesizer of digital information of the plurality of channels of video data, audio data, and superimposition data is recorded in a block of digital information.