JP2003022613A - Reproducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reproducer which can reproduce different voice data from a plurality of output terminals and instantaneously switch voice outputs. SOLUTION: The reproducer is provided with a demultiplexer 21 to distribute the voice data according to kinds, FIFO memories 23 to 30 for successively reading and successively wiring distributed voice data, audio decoders 32 to 39 to restore the stored and read voice data, a plurality of mixers 50 to 5n to select arbitrary voice data from restored voice data and output them as output voice data, an operation part 60 to indicate the output voice data to be selected, and a control part 61. The reproducer selects voice data from a recording medium on which a plurality of kinds of voice data are recorded, and reproduces them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing device,
In particular, the present invention relates to a reproducing device for reproducing audio data selected from a recording medium in which plural kinds of audio data are recorded.

[0002]

2. Description of the Related Art DVD (Digital Versat)
Some ile discs have a plurality of audio signals recorded together with video signals. However, since the conventional DVD reproducing device decodes only the selected audio data, even if the DVD software including a plurality of audio data is reproduced, only one selected audio can be output at any time. Also, when switching the selection to reproduce other audio data, a FIFO (First In Fi
(rst out) It is necessary to erase the memory once and store the data again, which causes a problem that it takes time until the sound reproduction is restarted. Further, the DVD has a problem in that audio compression may be performed in a plurality of compression formats, and control therefor is complicated.

[0003]

As described above, in a conventional reproducing apparatus such as a DVD, even if a plurality of audio data is recorded on the DVD, only one kind of selected audio data is reproduced when reproducing. It is not possible to reproduce a plurality of audio data at the same time, and even if the selection is switched and another audio data is reproduced, it is necessary to once erase the FIFO memory and store new data. The present invention solves these problems by a relatively simple method, can reproduce different audio data from a plurality of output terminals, and is capable of instantaneously switching the audio output. The realization is an issue.

[0004]

In order to achieve the above object, the present invention provides a reproducing apparatus for reproducing the audio data selected from a recording medium in which a plurality of types of audio data are recorded. Distribution means for distributing by type, audio data storage means for sequentially writing and sequentially reading the audio data distributed by the distribution means,
Audio data restoring means for restoring the audio data read from the audio data accumulating means, and a plurality of output voices for selecting arbitrary audio data from the audio data restored by the audio data restoring means and outputting it as output audio data Data selecting means, reproducing means for reproducing the output audio data selected by the plurality of output audio data selecting means and outputting as an audio signal, and instructing the output audio data selecting means for the output audio data to be selected And an operation instructing means for making a selection. Accordingly, it is possible to realize a reproducing device capable of reproducing different audio data from a plurality of output terminals and instantaneously switching the audio output.

[0005]

DETAILED DESCRIPTION OF THE INVENTION A reproducing apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.

The present invention relates to a technique for reading a bit stream consisting of a compressed video signal or audio signal from a communication medium or a storage medium, expanding the bit stream into the original video signal or audio signal, and selecting and reproducing it. Belong to the field. The present invention relates to a reproducing apparatus for converting digital video information and audio information input via a recording medium or a communication medium into a video signal and an audio signal and outputting the video signal and the audio signal. It has a function to insert the signal into the bit stream, extract only the channel set by the user in the playback device, and output it as a video signal and an audio signal, supply multiple audio information, select it on the user side, and use it. A function that allows users to listen and listen with their favorite voice is considered.

DVDs requiring such a function
There is a player. FIG. 1 illustrates a bitstream input by a DVD player. In FIG. 1, reference numerals 1 and 1
.. indicate video data blocks forming a video stream, and reference numerals 2 to 9, 11 to 18, ... indicate audio data blocks forming an audio stream. This bit stream is a video stream (1, 10, 19, ...) And an audio stream {ID1
(2, 11, ...), ID2 (3, 12, ...), ID3
(4, 13, ...), ID4 (5, 14, ...), ID5
(6, 15, ...), ID6 (7, 16, ...), ID7
(8, 17, ...) And ID8 (9, 18, ...)}.

Further, FIG. 2 shows a block diagram of essential parts of the reproducing apparatus of the present invention. In FIG. 2, reference numeral 20 is a disk drive, reference numeral 21 is a demultiplexer, reference numerals 22 to 30 are FIFO memories, reference numeral 31 is a video decoder, reference numerals 32 to 39 are audio decoders, reference numeral 40 is a video decoding buffer, and reference numerals 41 to 41. Reference numeral 48 is an audio decoding buffer, reference numerals 50 to 5n are mixers,
Reference numeral 60 is an operation unit, and reference numeral 61 is a control unit.

The operation of the present invention will be described with reference to FIGS. 1 and 2. First, the bitstream read from the disk drive 20 as shown in FIG.
Sent to 1. The demultiplexer 21 analyzes the input bit stream and outputs the video streams 1, 10, 1
9 ... in the FIFO memory 22, the audio stream ID 1 (2, 11, ...) Into the FIFO memory 23, the audio stream ID 2 (3, 12, ...) Into the FIFO memory 24, and the audio stream ID 3 (4, 13 ,.
...) is the audio stream I in the FIFO memory 25.
D4 (5, 14, ...) Into the FIFO memory 26, audio stream ID 5 (6, 15, ...) Into the FIFO memory 27, and audio stream ID 6 (7, 16, ...).
...) is the audio stream I in the FIFO memory 28.
D7 (8, 17, ...) Is stored in the FIFO memory 29, and the audio stream ID 8 (9, 18, ...) Is stored in the FIFO memory 30.

The video stream stored in the FIFO memory 22 is decoded (expanded) by the video decoder 31, stored in the video decoding buffer 40, and output at the display time. The audio stream ID1 stored in the FIFO memory 23 corresponds to the audio decoder 1
It is decoded at (32) and stored in the audio decoding buffer 41. The audio stream ID2 stored in the FIFO memory 24 corresponds to the audio decoder 2
It is decoded at (33) and stored in the audio decoding buffer 42. The audio stream ID3 stored in the FIFO memory 25 corresponds to the audio decoder 3
It is decoded at (34) and stored in the audio decoding buffer 43. The audio stream ID 4 stored in the FIFO memory 26 corresponds to the audio decoder 4
It is decoded at (35) and stored in the audio decoding buffer 44. The audio stream ID 5 stored in the FIFO memory 27 corresponds to the audio decoder 5
It is decoded at (36) and stored in the audio decoding buffer 45. The audio stream ID 6 stored in the FIFO memory 28 corresponds to the audio decoder 6
It is decoded at (37) and stored in the audio decode buffer 46. The audio stream ID 7 stored in the FIFO memory 29 is the audio decoder 7
It is decoded at (38) and stored in the audio decode buffer 47. The audio stream ID 8 stored in the FIFO memory 30 corresponds to the audio decoder 8
It is decoded at (39) and stored in the audio decoding buffer 48. In this way, the decoded audio data stored in the audio decoding buffers 41 to 48 are collected in the mixers 50, 51, ... 5n. Then, in accordance with an instruction input to the operation unit 60 and input via the control unit 61, mute or unmute of each audio stream is selected, and the mixer 5
Outputs from 0, 51, ... 5n are selected.

For example, in the case of DVD software in which the audio stream 1 contains Japanese and the audio stream 2 contains English, the user selects Japanese from the first audio output terminal and the second audio output. Consider the case where it is set to output English simultaneously from the terminal of. In this case, the mixer 49 is set so that only the data in the audio decoding buffer 41 is unmuted (sound is produced), and the remaining audio decoding buffers 42, 43, 44, 4
The data of 5, 46, 47, and 48 are set to the mute (silent) state. At the same time, the setting of the mixer 50 unmutes only the data of the audio decoding buffer 42, and the remaining audio decoding buffers 41, 43, 44, 4
The data of 5, 46, 47 and 48 are set to the mute state. With the above operation, the user's request can be met.

When the Japanese of the audio stream 1 is immediately reproduced after the English of the audio stream 2 is reproduced, the mixer 49 unmutes only the data of the audio decoding buffer 42 at the beginning, and the remaining audio decoding buffer 41, 43, 44, 45, 46, 4
The data of 7 and 48 are set to mute. Then, after a certain period of time, the player is internally set to a sleep state, and the mixer 49 is set to the audio decoding buffer 4
Only the data of 1 is unmuted, and the remaining audio decode buffers 42, 43, 44, 45, 46, 47, 4
The data of 8 is set to mute. With the above operation, the user's request can be met. When Japanese is output from the L channel and English is output from the R channel, the data in the audio decode buffer 41 is downmixed into a monaural sound, and the data in the audio decode buffer 42 is also downmixed into a monaural sound. To By outputting these two monaural sounds to the L channel and the R channel, the user's request can be met.

When a user switches from Japanese to English, in the conventional system, it is necessary to clear the FIFO memory after changing the setting of the demultiplexer, which may be accompanied by a change in the type of voice compression. For example, it was necessary to change the settings of the audio decoder. However, in the reproducing apparatus of the present invention, when the data in the audio decode buffer 41 is unmuted, the data in the audio decode buffer 42 is unmuted.
All that is required is to set the data in the audio decode buffer 41 to mute, which can be performed quickly and the control becomes very simple.

By performing the above processing, it becomes possible to simultaneously decode and output a plurality of audio data. In addition, voice switching can be performed simply by setting mute (silenced state) and unmute (state where sound is emitted), and it is possible to simply control the voice switching during playback, and to switch voices instantly. It will be possible to do.

[0015]

As described above, according to the invention of claim 1 of the present invention, in the reproducing apparatus, the distributing means for distributing the audio data by type and the audio data accumulating means for sequentially writing and sequentially reading the distributed audio data. And voice data restoration means for restoring the voice data accumulated and read,
A plurality of output voice data selecting means for selecting arbitrary voice data from the restored voice data and outputting it as output voice data, and reproducing the output voice data selected by the plurality of output voice data selecting means as a voice signal. A reproducing means for outputting and an operation instructing means for instructing and selecting the output audio data to be selected by the output audio data selecting means are provided, and the audio data is selected and reproduced from the recording medium in which plural kinds of audio data are recorded. To do. As a result, the playback apparatus of the present invention stores a plurality of types of audio data stored in the D
It is possible to simultaneously decode a plurality of audio data from VD. For example, in the case of DVD software that includes Japanese and English, 1) Japanese can be output simultaneously from the first audio output terminal and English can be output simultaneously from the second audio output terminal. it can. 2) After playing back English, it is possible to output Japanese playback immediately, and for example, it becomes possible to efficiently study English conversation. 3) Japanese can be output from the L channel, and English can be output from the R channel in the same manner as the conventional bilingual television broadcasting. Furthermore, in the reproducing apparatus of the present invention, audio switching can be easily performed by setting mute (silenced state) and unmute (state where sound is emitted) of each buffer output for each output terminal. The voice switching control can be simply performed, and the voice switching can be instantaneously performed.

The invention according to claim 2 of the present invention is characterized in that video data is also recorded on the recording medium, and the video data is reproduced simultaneously with the audio data. As a result, it is possible to realize a reproducing device capable of simultaneously reproducing a plurality of audio signals together with a video signal.

According to a third aspect of the present invention, the audio data is compressed and recorded on the recording medium, and the audio data restoring means has a function of decoding and expanding the compressed and recorded audio data. As a result, it is possible to decode, decompress, and output the audio data that is compression-encoded and recorded,
It is possible to increase the storage capacity of the audio signal of the recording medium and reduce the internal memory capacity of the device.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of a bitstream input to a playback device.

FIG. 2 is a block diagram of a main part of the reproducing apparatus of the present invention.

[Explanation of symbols]

1, 10, 19 ... Video data blocks, 2-9, 11
-18 ... Audio data block, 20 ... Disk drive, 21 ... Demultiplexer, 22-30 ... FIF
O memory, 31 ... Video decoder, 32-39 ... Audio decoder, 40 ... Video decode buffer, 41-
48 ... Audio decoding buffer, 50-5n ... Mixer, 60 ... Operation part, 61 ... Control part.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Katsumi Yoshida             134, Kobe-cho, Hodogaya-ku, Yokohama-shi, Kanagawa               Sony LSI Design Stock Association             In-house F-term (reference) 5D044 AB05 AB07 BC03 CC04 DE14                       FG10 HH05 JJ07

Claims (3)

[Claims] 1. A reproducing apparatus for reproducing the audio data selected from a recording medium on which a plurality of kinds of audio data are recorded, and a distributing means for distributing the audio data by type, and a distributing means for distributing by the distributing means. Audio data storage means for sequentially writing and sequentially reading the audio data, audio data restoring means for restoring the audio data read from the audio data storage means, and any of the audio data restored by the audio data restoring means A plurality of output audio data selecting means for selecting audio data and outputting as output audio data; a reproducing means for reproducing the output audio data selected by the plurality of output audio data selecting means and outputting as an audio signal; Operation instruction means for instructing and selecting the output voice data to be selected by the output voice data selecting means, A reproducing apparatus comprising: 2. The reproducing apparatus according to claim 1, further comprising video data reproducing means for simultaneously recording video data on the recording medium and reproducing the video data together with the audio data. 3. The audio data is compressed and recorded in the recording medium, and the audio data restoring means has a function of decoding and expanding the compressed and recorded audio data. Playback device.