JPH11219579A - Encoder of audio signal, audio disk, its reproducing device, and audio reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an audio disk which can reproduce easily for a user, is easy to use when an audio signal is mainly recorded, and can controlling simply an actual time. SOLUTION: A format of a DVD audio disk does not comprise VTS, and is constituted with only ATS. ATS is constituted with audio manager(AMG), audio manager menu(AMGM) of video and audio, and ATS 1, ATS 2 controlled by AGM 1 in AGM, also ATS 1, ATS 2 do not comprise A-CONT pack, and are constituted with A pack and still picture pack. These still picture packs are not arranged so many for the A pack, approximately, one pack per one track is arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio signal encoding device, an audio disk, a reproducing device therefor, and an audio reproducing device.

[0002]

2. Description of the Related Art As a conventional optical disk for audio reproduction, a CD (compact disk) is known. A DVD (digital video disk) is known as an optical disk having a higher density than a CD.

[0003]

SUMMARY OF THE INVENTION However, DVD
In the following (DVD-video), a video signal is recorded as a main signal and an audio signal is recorded as a sub signal. (1) The audio signal is integrated with the video signal, and the recording capacity of the audio signal is small. (2) The time of the audio signal cannot be managed. (3) Simple character information such as a song title cannot be extracted.

[0004] Also, compared with video, audio users have a wider range of usage, so that TOC (Ta
A simple reproduction method is required by providing an area of “ble of contents”. However, in DVD-Video, a navigation control pack (CONT pack), a plurality of video (V) packs and audio (A)
Since the VNT and A packs are controlled by the CONT pack by configuring the video content block unit by the pack, even if the audio signal is mainly recorded, it cannot be easily reproduced by the user, and the usability is poor. There is.

Further, in DVD-Video, time management is performed only in video frame units. Therefore, even if an audio signal is mainly recorded, it is difficult to manage the real time because the continuity of the audio signal is more important than that of video. There is a problem that is.

It is an object of the present invention to provide an audio disc which can be easily reproduced for a user when mainly recording an audio signal, is easy to use, and can simplify real time management. With the goal. Another object of the present invention is to provide a playback device for the audio disc. The present invention also provides
An object of the present invention is to provide an audio signal encoding device. The present invention also provides a first pack having audio data as actual data, a second pack having real-time information data relating to audio data as actual data, and a third pack having still picture data relating to audio data as actual data. Audio reproduction that can be configured inexpensively when reproducing a data structure having an audio signal, that can reproduce a still image in synchronization with an audio signal, and that can be turned over regardless of the reproduction of the audio signal It is intended to provide a device. Another object of the present invention is to provide an audio reproducing apparatus that can be configured at low cost when audio data or multi-channel audio data is A / D converted at two sampling frequencies. Another object of the present invention is to provide an audio reproducing apparatus which is effective for copy protection when copyright data relating to audio data and still picture data is recorded on a disc.

[0007]

In order to achieve the above object, the present invention does not include a playback control pack instead of a video title set and a management area including information for managing the video title set. An audio title set including audio data and still image data, and a management area including information for managing the audio title set are provided. That is, according to the present invention,
An audio title set including audio data and still image data without a pack for playback control, and a first management area including information for managing the audio title set; a video title set; There is provided an audio disc on which a data structure configured not to include a second management area including information for managing sets is recorded.

According to the present invention, there is also provided an audio title set including audio data and still picture data without including a playback control pack, and a first management area including information for managing the audio title set. And
An audio signal encoding device is provided that has means for formatting into a data structure that does not include a video title set and a second management area including information for managing the video title set.

According to the present invention, there is also provided an audio title set including audio data and still picture data without including a playback control pack, and a first management area including information for managing the audio title set. And
A data structure configured not to include a video title set and a second management area including information for managing the video title set, wherein audio data in the audio title set has a first sampling frequency. A / D converted first audio data;
An audio signal encoding device is provided that includes means for formatting into a data structure that includes at least one of the second audio data A / D converted at the second sampling frequency.

According to the present invention, there is also provided an audio title set including audio data and still picture data without including a pack for reproduction control, and a first management area including information for managing the audio title set. And
A data structure configured not to include a video title set and a second management area including information for managing the video title set, wherein the audio data is A at a first sampling frequency that is a multiple of 48 kHz.
A / D converted data at a frame rate of 1/600 second and a second sampling frequency that is a multiple of 44.1 kHz and A / D converted at a frame rate of 1 / 551.25
An audio signal encoding device is provided having means for formatting to a data structure that is data that is seconds.

According to the present invention, there is also provided an audio title set including audio data and still picture data without including a playback control pack, and a first management area including information for managing the audio title set. And
A data structure configured not to include a video title set and a second management area including information for managing the video title set, wherein the audio data is A at a first sampling frequency that is a multiple of 48 kHz.
A / D converted data at a frame rate of 1/600 second and a second sampling frequency that is a multiple of 44.1 kHz and A / D converted at a frame rate of 1 / 551.25
In the first management area, reproduction control information for prohibiting emphasis reproduction is recorded in the first management area when the first sampling frequency is 192 kHz and when the second sampling frequency is 176.4 kHz. There is provided an apparatus for encoding an audio signal having means for formatting into a data structure.

According to the present invention, an audio disc on which the above-mentioned data structure is recorded can be stored in the audio title set based on information in the first management area without using a playback control pack. There is provided an audio disc reproducing apparatus having means for reproducing still image data.

According to another aspect of the present invention, there is provided a first pack having audio data as real data, a second pack having real-time information data on audio data as real data, and an audio as real data. When reproducing a data structure having a third pack having still picture data relating to data, the data is reproduced by three systems of buffers and decoders. That is, according to the present invention, there is provided an audio title set (ATS) including a plurality of audio objects (AOBs) and a still picture set (SPS), wherein the AOB includes only a first pack having audio data as actual data. And a second AOB constituted by a second pack having real-time information data relating to the audio data as actual data, and a first AOB constituted by An apparatus for reproducing a data structure having a third pack including still picture data relating to the audio data, wherein the SPS distributes the first, second, and third packs; and the pack distribution means. Accumulate the first pack sorted by A first buffer, first decoding means for decoding audio data based on the first pack stored in the first buffer, and second decoding means for storing the second pack distributed by the pack distribution means. Buffer, second decoding means for decoding real-time information data based on the second pack stored in the second buffer, and second decoding means for storing the third pack distributed by the pack distribution means. An audio playback device comprising: a third buffer; and third decoding means for decoding still picture data based on the third pack stored in the third buffer.

According to the present invention, when audio data or multi-channel audio data is A / D converted at two sampling frequencies, D / A conversion is performed in one system. . That is, according to the present invention, at least the first audio data A / D converted at the sampling frequency of the first system and the second audio data A / D converted at the sampling frequency of the second system are sampled. An apparatus for reproducing a data structure selectively transmitted together with frequency data, comprising: means for determining a sampling frequency of audio data reproduced from a disc based on the sampling frequency data; Rate conversion means for rate-converting the audio data of the second system to the sampling frequency of the second system, and D / A converting the audio data at the sampling frequency of the second system.
/ A conversion means.

In the present invention, when copyright data relating to audio data and still picture data is recorded on a disk, the still picture data and the copyright data are combined and superimposed and displayed. . That is, according to the present invention, there is provided an apparatus for reproducing a data structure having audio data, copyright data relating to the audio data, and still picture data relating to the audio data, wherein the audio data is reproduced during reproduction of the audio data. An audio reproducing apparatus having means for combining and displaying copyright data and still picture data related to the audio data is provided.

According to the present invention, there is also provided an apparatus for reproducing a data structure having audio data, still picture data relating to the audio data, and copyright data relating to the still picture data, And an audio reproducing apparatus having means for combining and displaying the still picture data and copyright data relating to the still picture data.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing an embodiment of a DVD-video format and a DVD-audio format according to the present invention. FIG. 2 is an explanatory diagram showing the format of an audio manager (AMG) in FIG. 1 in detail. Audio title set (ATS) in Fig. 1
FIG. 4 is an explanatory diagram showing the format of the audio manager information (AMGI) of FIG. 2 in detail, and FIG. 5 is an audio title set attribute table (ATS-
FIG. 6 is an explanatory diagram showing the format of the audio title set attribute data (ATS-ATR) of FIG. 5 in detail, and FIG. 7 is a diagram showing the format of the audio title set information (ATSI) of FIG. FIG. 8 shows the audio title set information management table (ATSI-MA) shown in FIG.
FIG. 9 is a diagram showing the format of the audio title set menu, audio stream, and attribute data (ATSM-AST-AT) shown in FIG.
FIG. 10 is an explanatory diagram showing the format of the audio title set audio stream attribute table (ATS-AST-ATRT) of FIG. 8 in detail, and FIG. 11 is the attribute data of each audio stream of FIG. (ATS-AST-A
FIG. 4 is an explanatory diagram showing TR) in detail.

FIG. 12 is an explanatory diagram showing the audio content block unit (ACBU) of FIG. 1, and FIG.
14 is an explanatory diagram showing the format of the audio pack and the video pack of FIG. 12 in detail, FIG. 14 is an explanatory diagram showing the format of the audio control (A-CONT) pack of FIG. 12 in detail, and FIG. 15 is an audio character display (ACD) of FIG. 16 is an explanatory diagram showing the format of the area in detail, FIG. 16 is an explanatory diagram showing an example displayed by the namespace information in FIG. 15, FIG. 17 is an explanatory diagram showing the format of the audio search data (ASD) area in FIG. 14 in detail, FIG. 18 is an explanatory diagram showing a modification of the audio content block unit of FIG.

FIG. 19 is a block diagram showing a DVD-Audio disc reproducing apparatus according to the present invention, FIG. 20 is a block diagram functionally showing the reproducing apparatus shown in FIG. 19, and FIG. 21 is an audio system according to the second embodiment. FIG. 22 is an explanatory diagram showing the format of the manager information (AMGI) in detail; FIG. 22 is an explanatory diagram showing the TOC information of FIG. 21 in detail; FIG. 24 is a block diagram showing a DVD-Audio disc reproducing apparatus of the second embodiment, FIG. 25 is a block diagram functionally showing the reproducing apparatus of FIG. 24, and FIG. 26 is a block diagram of the third embodiment. FIG. 27 and FIG. 28 are block diagrams showing TOC information and a playback device, and FIG.
It is a flowchart for explaining a synchronous reproduction process.

Here, the DVD-audio disk described in this description has two stereo channels and 5/6/8 channels as audio signals so as to correspond to a transition period when shifting from the CD generation to the DVD-audio generation. Are recorded. Also, it is considered that when this transition period has elapsed, only the multi-channel signal of 5/6/8 channel will be recorded.

FIGS. 1A and 1B show DVD-Video and DVD-Audio formats, respectively.
The VD-audio format is compatible with DVD-Video, though the area name is different. First, the DVD-video format is roughly divided into a video manager (VMG) at the head and areas following a plurality of video title sets (VTS).
The audio format is correspondingly constituted by an audio manager (AMG) shown in detail in FIG. 2 and, as shown in detail in FIG. 3, each area of a plurality of audio title sets (ATS) following the AMG.

Each of the VTSs is composed of the first VTS information (VTSI), followed by one or more video content block sets (VCBS) and the last VTSI, while each of the ATSs corresponds to the first ATS. Information (ATSI) followed by one or more audio content block sets (A
CBS) and the last ATSI. AT
The performance time of each music piece in the ACBS is set in SI in real time. In the present invention, menu information for displaying a menu screen is recorded in the first ACBS. This is the same as a DVD video, and the description is omitted.

Each of the VCBSs is constituted by a plurality of VCBs, while each of the ACBSs is constituted by a plurality of ACBs. Each VCB has one video title (Ti
tre), and each ACB is correspondingly one audio title. Each VCB (one title) is constituted by a plurality of chapters (Chapter), while each ACB (one title) is correspondingly constituted by a plurality of tracks (Track). Chapters include part of title (PTT),
The track contains a part of title (PTT).

Each of the chapters includes a plurality of cells (CELL).
On the other hand, each of the tracks is correspondingly constituted by a plurality of indexes (Index). Each cell has a plurality of VCB units (VCBU)
On the other hand, each index is correspondingly constituted by a plurality of ACB units (ACBU). Each of the VCB unit and ACB unit is
Each pack is composed of a plurality of packs, and one pack is composed of 2048 bytes.

Each VCB unit is composed of a head control pack (hereinafter referred to as a CONT pack), followed by a plurality of audio (A) packs, video (V) packs, and sub-picture (SP) packs.
Each of the ACB units has a corresponding audio control pack (A-CONT pack) at the beginning.
, Followed by a plurality of A packs and V packs.

In the CONT pack, information for controlling the succeeding V pack is arranged. In the A-CONT pack, the T of the CD is stored.
Information for managing the audio signal of the succeeding A-pack, such as OC information, is arranged. A pack contains audio data, and V pack contains video data,
For example, closed caption (CC) data other than audio data is arranged.

As shown in FIG. 2, the AMG (audio manager) includes: an audio manager information (AMGI) shown in detail in FIG. 4; an audio content block set (AMGM-ACBS) for an AMG menu; AMGI. The AMGM-ACBS has presentation control information (PCI) and data search information (DSI) as control information.

As shown in FIG. 3, ATS (audio title set) includes: audio title set information (ATSI) shown in detail in FIG. 7, audio content block set for ATS menu (ATSM-ACBS), and ATS. It has an audio content block set (ATSA-ACBS) for titles, and ATSI for backup. Both ATSM-ACBS and ATSA-ACBS have the PCI and DSI described above (FIG. 2).

The AMGI (Audio Manager Information) is shown in detail in FIG. 4 as follows: An AMGI management table (AMGI-MA)
T) and a title search pointer table (T-SRPT)
Audio manager menu PGCI unit table (AMGM-PGCI-UT) Parental management information table (PTL-MAIT) Audio title set attribute table (ATS-ATRT) shown in detail in FIG. A text data manager (TXTDT-MG); an audio manager menu cell (index)
An address table (AMGM-C-ADT); an audio manager menu; an audio content block unit; and an addressless map (AMGM-C-ADT).
ACBU-ADMAP).

The ATS-ATRT (audio title set attribute table) is shown in detail in FIG. 5, as follows: audio title set attribute table information (ATS-ATRTI); and audio titles of a plurality (n) of ATSs. Set attribute search pointer (ATS-ATR-
SRP # 1 to #n) and audio title set attribute data (ATS-ATR- # 1 to #n) for each of a plurality (n) of ATSs as shown in detail in FIG.

As shown in detail in FIG. 6, each of the audio title set attribute data (ATS-ATR- # 1 to #n) includes: ATS-ATR-EA (end address); and ATS-CAT (category). And ATS-ATRI (information).

The ATSI (ATS information) shown in FIG. 3 is as shown in detail in FIG. 7, and the audio title set information management table (ATSI-MA) shown in FIG.
T), audio title set, part of title, search pointer table (ATS-PTT-SRPT)
Audio title set program chain information table (ATS-PGCIT); audio title set menu PGCI unit table (ATSM-PGCI-UT); audio title set time map table (ATS-TMAPT) Audio title set menu cell address table (ATSM-C-ADT) audio title set menu audio content block unit address map (ATSM-ACBU-ADMAP)
Audio title set cell address table (ATS-C-ADT) Audio title set Audio content block unit Address map (ATS-ACBU-
ADMAP).

The ATSI-MAT (audio title set information / management table) shown in FIG. 7 includes: ATS-ID (identifier), ATS-EA (end address), and ATSI- EA, VERN (DVD audio specification version number), ATS-CAT (category), ATSI-MAT-EA, ATSM-ACBS-SA (start address), ATSA-ACBS-SA ATS-PTT-SRPT-SA, ATS-PGCIT-SA, ATSM-PGCI-UT-SA, ATS-TMAP-SA, ATSM-C-ADT-SA, ATSM -ACBU-ADMAP-SA;-ATSM-A as detailed in FIG. ST-ATR
(ATSM audio stream attributes)
ATS-AST-Ns (the number of ATS audio streams); ATS-AST-ATRT as detailed in FIG.
(ATS audio stream attribute table).

The ATSM-AST-ATR is composed of 8 bytes (bits b63 to b0) as shown in detail in FIG. To (4) are allocated (other bits are reserved). (1) Audio encoding mode (3 bits b63 to b6
1) 000b: Dolby AC-3 010b: MPEG-1 or MPEG-2 (without extended bitstream) 011b: MPEG-2 (with extended bitstream) 100b: Linear PCM audio 101b: Linear PCM audio (2ch + 5ch, 2ch)
Includes + 6ch, 2ch + 8ch. )

(2) Quantization / DRC (Dynamic Range Control) information (2 bits b55, b54)-"11b" when the audio encoding mode is "000b"-"010b" or "10b" when the audio encoding mode is "000b" 011
In the case of "b", 00b: dynamic range control data does not exist in the MPEG audio stream 01b: dynamic range control data exists in the MPEG audio stream 10b, 11b: hold-The audio encoding mode is "100b", "101"
"b" for stereo 2ch 00b: 16 bits 01b: 20 bits 10b: 24 bits 11b: Reserved

(3) Sampling frequency fs (2 bits b53, b52) 00b: 48 kHz 01b: 96 kHz 10b: 192 kHz for two stereo channels (4) Number of audio channels (3 bits b50 to b4)
8) 000b: 1ch (monaural) 001b: 2ch (stereo) 010b: 3ch 011b: 4ch 100b: (stereo 2ch + 5ch) 101b: (stereo 2ch + 6ch) 110b: 7ch 111b: (stereo 2ch + 8ch)

ATS-AST-ATRT shown in FIG.
The (ATS audio stream attribute table) has ATS-AST-ATR for each of audio streams # 0 to # 7, as shown in detail in FIG.
Each of the TS-AST-ATRs is composed of 8 bytes (64 bytes in total).

ATS-A of one audio stream
As shown in FIG. 11, the ST-ATR includes an audio title set menu, an audio stream,
It is composed of 8 bytes (bits b63 to b0) similar to the attribute data (ATSM-AST-ATR). ) And (6)
Audio type (2-bit b59, b58),
(7) Audio application mode (2-bit b
57, b56), (8) thinning information (2 bits b47, b46) of the stream (AST), and (9) LF
E (Low Frequency Effect) thinning information of only 1ch (2
Bit b45, b44). And
11b: 2ch + surround mode is recorded in the (7) audio application mode of this DVD audio disc, and (8) the thinning information of the stream and (9) the thinning information of only the LFE 1ch are both band information. 00b: Full (1/1) 01b: Half (1/2) 10b: Quarter (1/4)

However, (4) the number of audio channels in the ATSM-AST-ATR is always 2ch for the audio stream # 0, and the audio stream # 1 includes the front 3ch. That is, for example, when an audio signal of one title is recorded in 2 + 6 ch, the stereo signal of 2 ch is converted to audio stream # 0.
, And 3 of the 6 channels are assigned to the audio stream # 1, and the 2ch rear signal and LFE
One channel signal is assigned to audio stream # 2. Then, both the audio manager information management table (AMGI-MAT) shown in FIG. 4 and the audio title set information management table (ATSI-MAT) shown in FIG. "
Is recorded.

When the 2 + 6 ch analog audio signal is sampled at, for example, the following sampling frequency fs and quantized by the following quantization bit number and recorded, stereo 2 ch: 48 kHz, 20-bit front 3 ch: 96 kHz, 16 bits Rear 2 ch, LFE 1 ch: 48 kHz, 16 bits (no thinning) Audio title set menu audio stream attribute data (ATSM-A) shown in FIG.
ST-ATR) has attributes of stereo 2ch. (1) Audio encoding mode 101b: linear PCM audio (2ch + 5ch, 2ch)
Includes + 6ch, 2ch + 8ch. (2) Quantization / DRC 01b: 20 bits (3) Sampling frequency fs 00b: 48 kHz (4) Number of audio channels 101b: (stereo 2ch + 6ch) is recorded.

The ATS of audio stream # 0
For AST-ATR: (1) Audio encoding mode 101b: Linear PCM audio (2ch + 5ch, 2ch
Includes + 6ch, 2ch + 8ch. (2) Quantization / DRC 01b: 20 bits (3) Sampling frequency fs 00b: 48 kHz (4) Number of audio channels 001b: 2 ch (stereo) (7) Audio application mode 11 b: 2 ch + surround mode (8) Thinning-out information 00b: Full (1/1) (9) Thinning-out information 00b: Full (1/1) is recorded only for LFE1ch.

The ATS of audio stream # 1
For AST-ATR: (1) Audio encoding mode 101b: Linear PCM audio (2ch + 5ch, 2ch
Includes + 6ch, 2ch + 8ch. (2) Quantization / DRC 00b: 16 bits (3) Sampling frequency fs 01b: 96 kHz (4) Number of audio channels 010b: 3 ch (7) Audio application mode 11b: 2 ch + surround mode (8) Thinning information of the stream 00b : Full (1/1) (9) Thinning information of only LFE 1ch 00b: Full (1/1) is recorded.

The ATS of audio stream # 2
For AST-ATR: (1) Audio encoding mode 101b: Linear PCM audio (2ch + 5ch, 2ch
Includes + 6ch, 2ch + 8ch. (2) Quantization / DRC 00b: 16 bits (3) Sampling frequency fs 00b: 48 kHz (4) Number of audio channels 010b: 3 ch (7) Audio application mode 11b: 2 ch + surround mode (8) Thinning information of the stream 00b : Full (1/1) (9) Thinning information of only LFE 1ch 00b: Full (1/1) is recorded.

Next, the A pack in which the audio stream is recorded and its control pack will be described. As shown in FIG. 12, the VCB unit is composed of an arbitrary number of packs for 0.4 to 1.0 seconds, and the ACB unit is 0.5
It is composed of an arbitrary number of packs for up to 1.0 second. The A-CONT pack in the DVD-Audio ACB unit is arranged in the third pack in the DVD-Video VCB unit.

The A-CONT pack is basically arranged in units of 0.5 second of the audio time, and is arranged so as to be completed within the range of 0.5 to 1.0 second at the break of the index. Also, audio time (GOF: Group of Audio)
(Frame unit) is indicated by the A-CONT pack, and the data position is determined by the number of the audio frame number, the first access unit pointer, and the frame header. The A-pack immediately before the A-CONT pack is
Do not force padding to 0.5 seconds of audio time.

Adjacent A-packs are arranged so that audio signals are related to each other. For example, in the case of stereo, an L-channel pack and an R-channel pack are arranged adjacent to each other. Similarly, in the case of multi-channel, they are arranged adjacently. The V pack is arranged adjacent to the A pack when displaying an image during reproduction of an audio signal. A pack and V pack are shown in FIG.
As shown in FIG. 19, 4-byte pack start information, 6-byte SCR (System Clock Reference) information, and 3-byte Mux rate for 2034 bytes of user data (A data, V data) (Rate) information and a 1-byte stuffing are added to add a 14-byte pack header (1 pack = 2048 bytes in total). In this case, the time of the A pack in the same title can be managed by setting the SCR information as the time stamp to be “1” in the first pack in the ACB unit so as to be continuous in the same title.

On the other hand, the A-CONT pack is shown in FIG.
, A 14-byte pack header, a 24-byte system header, a 1003-byte ACD (Audio Character Display) packet,
It is composed of byte ASD (Audio Search Data) packets. The ACD packet has a 6-byte packet header and a 1-byte substream ID.
And a 636-byte ACD as shown in detail in FIG.
(Audio Character Display) Information and 360
It consists of a reserved area of bytes. The ASD packet also has a 6-byte packet header and a 1-byte substream ID, and a 10-byte packet as shown in detail in FIG.
It is composed of 00 bytes of ASD (audio search data).

The ACD information area of 636 bytes is shown in FIG.
As shown in detail in FIG. 5, there is a 48-byte general information area and a 294-byte area for each of the first language character "1" and the second language character "2". The name space area includes two free space areas of 93 bytes each and a data pointer area of 15 bytes. For example, as shown in FIG. 16, data for displaying a song name in Japanese is arranged in one namespace area of the character “1” of the first language and the character “2” of the second language, and the other. In the name space area, data to be displayed in English is arranged. This display language may be determined by the disc publisher.

The 48-byte general information is, for example, 1
6 bytes of service level information, 12 bytes of language code information, 6 bytes of character set code information, 6 bytes of display item information, 2 bytes of "difference from previous ACD information" information, and 6 bytes , And the hold information. The 16-byte service level information indicates display size, display type, audio / video / SP distinction, stream, and the like. Characters are mandatory (mandatory), and bitmaps are optional (optional). 12
The language code information of the byte indicates the language of the characters “1” and “2” in 2 bytes each as in the case of the video file, and indicates a maximum of eight languages in one file. English is mandatory.

The 6-byte character set code information can have a maximum of 15 character codes corresponding to language codes, and indicates the presence / absence and type of the language of the characters "1" and "2" in 1 byte. A code example is shown below. 1. ISO646 2. ISO8859-1 3. The MS-JIS 6-byte display item information indicates the free spaces “1” and “2”, the presence / absence of a data pointer, and the ID shown in FIG. The namespace is mandatory, and the title name, music name, and artist name must be described.

As shown in detail in FIG. 17, the 1000-byte ASD (audio search data) has 16-byte general information, 8-byte current number (No.) information, 16-byte current time information, and 8 bytes. It is composed of a title set search information of 8 bytes, a title search information of 8 bytes, a track search information of 404 bytes, an index search information of 408 bytes, a highlight search information of 80 bytes, and a reserved area of 52 bytes. I have.

The 8-byte current number information includes the current title number of the title set (2 bytes: BCD) and the current track number of the title set (2 bytes: BC).
D), the current index number (2 bytes: BCD) of the track, and the reserved area (2 bytes). The 16-byte current time information includes the track playback time (4 bytes: BCD), the remaining playback time of the track (4 bytes: BCD), the absolute time of the title (4 bytes: BCD), and the rest of the title. (4 bytes: BCD).

The 8-byte title set search information is:
It consists of the first sector number (4 bytes) of the title set and the last sector number (4 bytes) of the title set. The 8-byte title search information includes the first sector number (4 bytes) of the title and the last sector number (4 bytes) of the title. 4
The 04-byte track search information includes a track and sector number of the title (4 bytes × 99), a first track number of the title (4 bytes), and a last track number of the title (4 bytes).

The 408-byte index search information includes a track index and a sector number (4 bytes × 100) and a first index number (4
Byte) and the last index number of the track (4 bytes). The 80-byte highlight search information is a track in-sector number (4 bytes × 1).
0) and track out sector number (4 bytes x 10)
It consists of.

According to such a format, a plurality of A packs are provided at the beginning with a subsequent A pack like the TOC information of a CD.
A-CONT for managing audio signal of pack
Since the packs are arranged, the audio data is not integrated with the video data and the like, and the recording capacity can be increased. Also, audio time can be managed by the A-CONT pack, and simple character information such as a song title relating to audio data can be extracted by the A-CONT pack.

The title in the A-CONT pack,
Since TOC information such as a start address and performance time is arranged, even during audio reproduction, information corresponding to a user operation can be taken out from the A-CONT pack and reproduction can be started. Also, by arranging the TOC information in the audio manager information (AMGI) and the audio title set information (ATSI), the necessary TOC information is stored in the memory in the playback device, and the information according to the operation of the user is stored in the memory. And immediately start playback. Also, since there is no need to store large-capacity information such as program chain information (PGCI) in DVD-Video, it is possible to efficiently manage disks.

Further, 1. When there is no image (V) data in the content, (1) Search and random access to three layers of title, music, and index become possible. (2) Cueing, time search, and random access in GOF (audio frame) units become possible. (3) Title, song, and index time can be managed in real time.

Also, 2. When there is image (V) data in the content, regarding the audio data, in addition to the above (1) to (3), (4) the title, the current time in the music, and the remaining time are displayed and managed in real time. be able to.

Regarding video data, (1) Search and random access to three layers of title, PTT, and cell become possible. (2) Cueing, time search, and random access in video frame units become possible. (3) Title, PTT, and cell time can be managed in real time. (4) The current time and the remaining time in the PTT or the title can be displayed and managed in video frame unit time.

Note that the ACBU in FIG.
Although the NT pack and the CONT pack are included, the configuration may be such that the V pack and the CONT pack are not included as shown in FIG. In this case, the video signal is not recorded, but the recording capacity of the audio signal is increased, the disc size can be reduced, and the reproduction function can be simplified, so that the portable reproduction is possible. Anything suitable for the device can be provided.

Next, a reproducing apparatus according to the present invention will be described with reference to FIG. On the DVD audio disk 1, data having the above structure is EFM-modulated and recorded in the form of pits. When music selection, reproduction, fast-forward, and stop operations are performed by the operation unit 18 or the remote control device 19, the control unit 23 controls the drive device 2 and the reproduction device 17 in accordance with the operations.
Is read by the drive device 2 and then EFM demodulated.

In the reproducing device 17, this signal is sent to the CONT pack detector 3 and the A-CONT pack detector 9. The CONT pack detector 3 detects the CO in the reproduced data.
Detects NT pack and sets control parameters in parameter section 8
And the V pack controlled by the CONT pack is sequentially written into the V pack buffer 4. The user data (video signal, sub-picture information) in the V pack written in the V pack buffer 4 is stored in the pack order by the buffer extracting unit 5 based on the SCR (see FIG. 13) in the V pack, and in the CONT pack. PTS (Pr
(Esentation TimeStamp), and then output as an analog video signal via the image converter 6, the D / A converter 7, and the video output terminals 15, 15 '.

The A-CONT pack detecting section 9 detects the A-CONT pack in the reproduction data, sets the control parameters in the parameter section 14, and sets the A-CONT pack.
The A pack controlled by the T pack is sequentially written into the A pack buffer 10. The user data (audio signal) in the A pack written in the A pack buffer 10 is
The buffer extracting unit 11 extracts the audio search data ASD in the A-CONT pack in the order of packs and the output time based on the current time (see FIG. 17) of the audio search data ASD in the A-CONT pack.
The signal is output as an analog audio signal via the conversion unit 13 and the audio output terminal 16. Also, A-CONT
The display data (the audio character display information ACD shown in FIGS. 15 and 16) in the pack is sent to the display signal generator 20 to generate a display signal, and the display signal is output via the display signal output terminal 22. Or output to the built-in character display unit 21.

FIG. 20 is a block diagram functionally showing the configuration shown in FIG. The reproducing means 2 corresponds to the drive device 2 shown in FIG. 19, and the reproduced signal processing separating means A (9, 10,.
11 and 14) correspond to the A-CONT pack detecting unit 9, the A-pack buffer 10, the buffer extracting unit 11 and the parameter unit 14, and provide audio signal output means (12, 1).
3) corresponds to the PCM conversion unit 12 and the D / A conversion unit 13, and the character information output unit 20 corresponds to the display signal generation unit 20. Also, the reproduction signal processing separation means V (3, 4,.
5 and 8) correspond to the CONT pack detection unit 3, the V pack buffer 4, the buffer extraction unit 5 and the parameter unit 8, and the video signal output unit and the sub-picture information output unit (6 and 7) correspond to the image conversion unit 6 and D / A conversion unit 7. The control means 23 corresponds to the control unit 23.

In FIG. 20, the control means 23 is the operation unit 1
When a command signal for reproducing the target music is transmitted from the remote control device 8 or the remote control device 19, an address control information signal corresponding to the reproduction command is transmitted to the reproducing means 2 so that the target music is reproduced from the DVD audio disk 1. Reproduce. The reproduced signal processing / separating means A separates the reproduced data to A
-Send the CONT information to the control means 23, send the audio signal to the audio signal output means (12, 13), and send the character information to the character information output means 20. The reproduction signal processing separation means V separates the reproduction data and sends CONT information to the control means 23, and converts the video signal and the sub-picture information into the video signal means and the sub-picture information output means (6, 7), respectively.
Send to

Next, a reproducing apparatus according to the second embodiment using TOC (Table Of Contents) information will be described.
As shown in FIG. 21, a TOC such as that shown in detail in FIG. 22 is additionally recorded in an empty area of AMGI (Audio Manager Information), and the playback device accesses the TOC information to find the beginning of the music. Do. FIG.
Reference numeral 2 denotes, as an example, general TOC information recorded in a lead-in area of a CD, and the same information is repeatedly recorded three times. When recording on the DVD audio disk 1 of the present invention, the above-described operation may be repeated, or may not be repeated.

Here, the TO used in the CD is
In the C information, the absolute time at which each movement indicated by the numeral when point = 00 to 99 starts is expressed in minutes (PMIN), seconds (PSEC), and frames (PFRAME). When point = A0, PMIN indicates the first movement, and PSEC = PFRAME = 0. When point = A1, PMIN indicates the last movement, PS
EC = PFRAME = 0. When point = A2, the absolute time at which the lead-out area starts is minutes (PMI
N), seconds (PSEC) and frames (PFRAME). Therefore, the TOC information shown in FIG.
This indicates that six songs (or six movements) have been recorded on the D audio disc 1 (points = 01 to 01).
06). This TOC information is used instead of AMGI.
As shown in FIG. 23, it may be recorded in an empty area of ATSI (audio title set information), or recorded in a reserved area (for 360 bytes) in an ACD packet of the A-CONT pack shown in FIG. You may do so.

The TOC information is read at the start of reproduction and is stored in the TOC information storage memory 14A shown in FIGS. 24 and 25. When the start reproduction of a tune or a movement is designated, the TOC information storage memory 14A is read. See DV
The D audio disk 1 is accessed. Note that this T
OC information may also be AMGI, ATSI or A-CONT
In addition to the recording in the pack, as shown in FIG. 26, it is additionally recorded in the lead-in area (TOC area 1a in the figure) of the innermost periphery of the DVD audio disc 1, and when the reproduction is started, the TOC detection means 24 sets this TOC detection section to the TOC detection section. The area 1a may be accessed independently and stored in the TOC information storage memory 14A. Note that this TOC information conforms to the configuration of FIG. 22, but adds simple reproduction information such as a downmix coefficient.
It is sometimes called PP (Simple Audio Play Pointer).

Next, an AV synchronous reproduction process using the TOC information will be described with reference to FIGS. In FIG. 27, when the reproduction of the beginning of the music or movement is designated, the TOC information corresponding to the designated position is referred to (step S1).
Next, the cell and index locations are calculated based on the TOC information (step S2). Next, the location is searched (step S3), and when confirmed, synchronous reproduction of A and V is performed as shown in detail in FIG. 28 (step S4 → S).
5).

In FIG. 28, the CONT pack is reproduced (step S11), the A-CONT pack is reproduced (step S12), and then the CONT pack and the AC are reproduced.
It is checked whether the time information in the ONT pack is the same time (step S13). If the time is not the same, both the CONT pack and the A-CONT pack are ± 1.
The pack is adjusted by the amount corresponding to the pack (step S14), and the process returns to step S11 to reproduce the CONT pack and the A-CONT pack. In step S14, CONT
One of the pack and the A-CONT pack may be adjusted by ± 1 pack, and the pack may be reproduced.

When the time information in the CONT pack and the time information in the A-CONT pack are the same in step S13, the A-pack controlled by the A-CONT pack is reproduced and the A-pack address (SCR information) is incremented by one. (Step S15), and then the CONT
Play V pack controlled by pack and V
The pack address (SCR information) is incremented by one (step S16). Next, it is checked whether or not the reproduction of the A-pack has been completed (step S17). If it has not been completed, the process proceeds to step S18, and if it has been completed, the process proceeds to step S20.

In step S18, it is checked whether or not the reproduction of the V-pack has been completed. If the reproduction has not been completed, the process returns to step S13, and if completed, the process proceeds to step S19. In step S19, the next V pack controlled by the CONT pack is reproduced and V
The pack address is incremented by one, and step S1
Return to 3. In step S20, the next A-pack controlled by the A-CONT pack is reproduced, the A-pack address is incremented by one, and it is checked whether the reproduction of the V-pack is completed (step S2).
1) If not finished, proceed to step S22,
On the other hand, if the processing has been completed, the process proceeds to step S23.

In step S22, it is checked whether or not the A pack controlled by the A-CONT pack is the last pack. If it is not the last pack, the process returns to step S16. To reproduce the next A-CONT pack. Step S23
Then, the next V pack controlled by the CONT pack is reproduced, and the V pack address is incremented by one. Then, it is checked whether or not the end of the frame (EOF) has been reached (step S24). And, on the other hand, in the case of EOF, this AV
The synchronous playback processing ends. As described above, the audio data A and the video data V stored in the pack
Playback is seamlessly synchronized based on time management information in the pack and the A-CONT.

Next, a fourth embodiment will be described.
FIG. 29 shows a fourth example of the DVD audio disk according to the present invention.
31 to 33 show the format of the embodiment of FIG.
The VTS shown in FIG. 1 is not included, and is constituted only by the ATS. The ATS includes an audio manager (AMG) shown in FIG. 1B, a video and audio audio manager menu (AMGM),
ATS <1> and AT managed by AMGI in G
S <2>, ATS <1> and AT
As shown in FIG. 30, S <2> does not include the A-CONT pack, and is composed of an A pack and a still image pack. Also, the number of the still image packs is not larger than that of the A pack, and about 1 pack is arranged per track.

Here, for reference, FIG. 31 shows a DVD-V
an (video + audio navigation) disc, which format is roughly D
Video title set (VT) as VD-video data
S) and an ANV title set (ANV-TS) as audio navigation data. In more detail, the VTS has the same configuration as the DVD video disk shown in FIG. 1A and FIG. 32 described later, while the ANV-TS has an audio manager (AMG) shown in FIG. ATS in the AMG in pairs with VTS <1> and VTS <2> of
It is composed of ATS <1> and ATS <2> managed by I. The format of the DVD video disk does not include ATS or ANV-TS as shown in FIG. 32 and FIG.

FIG. 33 shows the format of a DVD-Avd (audio + AV data) disc. The format is roughly a video title set (VTS) as DVD-video data and an audio title set (VTS) as DVD-audio data. ATS). In more detail, VTS
A video manager (VMG) shown in (a) and a video and audio video manager menu (VMGM)
And VTS <1> managed by VMGI in VMG
It consists of. On the other hand, the ATS has an audio manager (AMG) shown in FIG. 1B and an audio manager menu (AMGM) for video and audio.
And AT which is paired with audio data in VTS <1> on the VTS side and managed by AMGI in AMG
S <1> does not form a pair with the VTS side, and is composed of ATS <2> which is also managed by AMGI in AMG. As shown in FIG. 30, the ATS <2> does not include the A-CONT pack, and is composed of the A pack and the still image pack.

FIG. 34 shows an audio-only title audio object attribute (AOTT-AOB-) recorded on the disc as attribute data indicating the contents of audio data of the disc of the fourth embodiment.
ATR). This attribute data is 8 bytes (6
It is composed of 4 bits b63 to b0) and is described in detail in order from the MSB side. 4 bits (b63 to b60) audio encoding mode; 1 bit (b59) downmix (DM) mode; A 3-bit (b58 to b56) multi-channel structure; a 4-bit (b55 to b52) quantization bit number Q1 of the channel group 1; and a 4-bit (b51 to b48) channel group 2 quantization bit number. Q2, a sampling frequency fs1 of channel group 1 of 4 bits (b47 to b44), a sampling frequency fs2 of channel group 2 of 4 bits (b43 to b40), and a reserved area of 3 bits (b39 to b37). -Channel allocation of 5 bits (b36 to b32);-Remaining 32 bits (b31 to b0) It is composed of a reservation area. Note that the remaining 32 bits (b31 to b
0) is used for attribute data of each channel.

The above data will be described in more detail below. (1) Audio encoding mode (b63 to b60) 0000b: Linear PCM mode 0001b: Reserved for compressed audio (Dolby Digital) 0010b: Reserved for compressed audio (without MPEG2 extension) 0011b: For compressed audio (with MPEG2 extension) 0100b: Reserved for compressed audio (DTS) 0101b: Reserved for compressed audio (SDDS) Others: Reserved for other encoding modes (2) Downmix mode (b59) 0b: Downmix stereo output permitted 1b: Downmix stereo output prohibited (3) Multi-channel structure type (b58 to b56) 000b: type 1 Other: reserved

(4) Number of quantization bits Q of channel group 1 (b55 to b52) 0000b: 16 bits 0001b: 20 bits 0010b: 24 bits Other: reserved (5) Number of quantization bits Q of channel group 2 (b51
-B48)-The quantization bit number Q of the channel group 1 is "0000".
"0000b" in the case of "b". The quantization bit number Q of the channel group 1 is "0001".
"0000b" or "0001b" in the case of "b". The quantization bit number Q of the channel group 1 is "0010".
In the case of "b", "0000b", "0001b" or "0010b" where 0000b: 16 bits 0001b: 20 bits 0010b: 24 bits Other: reserved

(6) Sampling frequency fs1 of channel group 1 (b47 to b44) 0000b: 48 kHz 0001b: 96 kHz 0010b: 192 kHz 1000b: 44.1 kHz 1001b: 88.2 kHz 1010b: 176.4 kHz Others: reserved

(7) Sampling frequency fs2 of channel group 2 (b43 to b40) “0000b” when sampling frequency fs1 of channel group 1 is “0000b” • Sampling frequency fs1 of channel group 1 of “0001b” In this case, "0000b" or "000
1b ”•“ 0000b ”,“ 0001 ”when the sampling frequency fs1 of the channel group 1 is“ 0010b ”
"b" or "0010b"-"1000b" when the sampling frequency fs1 of the channel group 1 is "1000b"-"1000b" or "100" when the sampling frequency fs1 of the channel group 1 is "1001b"
1b ”-“ 1000b ”,“ 1001 ”when the sampling frequency fs1 of the channel group 1 is“ 1010b ”
b "or" 1010b "

The disc of the fourth embodiment uses the linear PCM mode. As shown in FIG. 35, the private header of the linear PCM includes: an 8-bit substream ID; a 4-bit reserved area; a 4-bit ISRC number; an 8-bit ISRC data; A 16-bit first access unit pointer; a 1-bit audio emphasis flag F1
And 1 bit audio emphasis flag F2.

The audio emphasis flag F1 indicates that the sampling frequency fs is 96 kHz or 8 kHz.
In the case of 8.2 kHz, "Emphasis off" (= 0
b) is described, otherwise "Emphasis on"
(= 1b) is described. The audio emphasis flag F2 indicates that the sampling frequency fs is 192.
In the case of kHz or 176.4 kHz, "Emphasis off" (= 0b) is described, and in other cases, "Emphasis on" (= 1b) is described.

Next, a reproducing process of the reproducing apparatus according to the fourth embodiment will be described with reference to FIGS. First, FIG.
In step 6, it is determined whether the reproduced signal is data of an audio title set (ATS) alone or has both data of a still image (step S500).
In the case of the single data, only the ATS is reproduced (step S501), and when both data are included, the ATS and the still image are reproduced (step S502).

In FIG. 37, first, it is determined whether the sampling frequency is a first sampling frequency which is a multiple of 48 kHz or a second sampling frequency which is a multiple of 44.1 kHz (step S600). In step S601, the frame rate is set to the first frame rate (1/600 second). On the other hand, in the case of the second sampling frequency, the frame rate is set to the second frame rate (1 / 551.25 second). ) (Step S6)
02). At this time, the determined sampling frequency may be displayed (step S603).

In FIG. 38, first, it is determined whether or not the sampling frequency fs is 192 kHz (step S70).
0), in the case of 192 kHz, the emphasis circuit is turned off (step S703). If the frequency is not 192 kHz, it is determined whether or not the audio emphasis flag is on (step S701). If the audio emphasis flag is on, the emphasis circuit is turned on (step S702). Go ahead and turn off the emphasis circuit.

In FIG. 39, first, it is determined whether or not the sampling frequency fs is 176.4 kHz (step S).
800) If the frequency is 176.4 kHz, the emphasis filter operation is turned off (step S803). If it is not 176.4 kHz, it is determined whether the audio emphasis flag is on (step S8).
01), if it is on, the emphasis filter operation is turned on (step S802). If it is not on, the process proceeds to step S803 to turn off the emphasis circuit.

FIGS. 40 and 41 show an encoding device.
FIG. 40 is a block diagram showing an embodiment of an audio signal encoding device according to the present invention, and FIG. 41 is a block diagram showing a signal processing circuit of FIG. 40 in detail.

In FIG. 40, analog audio signal A
Is sampled by the A / D converter 31 at a sufficiently high sampling frequency (sampling period Δt), for example, 192 kHz, and a high-resolution P of, for example, 24 bits
Are converted to CM signals and correspond to a data sequence xb1, x1, xa1, x2, xb2, x3, xa2,.
, Xbi, x2i-1, xai, x2i,...
This data string (xbi, x2i-1, xai, x2i) is encoded by the signal processing circuit 32 and the memory 33 shown in detail in FIG.

The configuration of the signal processing circuit 32 will be described in detail with reference to FIG. First, a data string (xbi, x2i-1, x
ai, x2i), data strings xc1, *, *, *, xc2, *, *, *, corresponding to the band-limited low-resolution curve β
xc3, *, *, *, ..., xci, *, *, *, ...
And then thinning out the data “*” from the data string by the thinning circuit 37 to obtain data strings xc1, xc2, x
c3,..., xci,. Here, the data string xci is band-limited to the digital data A / D converted by the A / D converter 31 so that the sampling frequency is 1
The data sequence is reduced to / 4.

The data sequence (xbi, x2i-1, xai, x
2i), the data xi is decimated by the decimating circuit 38 to obtain data strings xb1, xa1, xb2, xa2,.
bi, xai, ... are generated.

Then, these data strings xci, xbi, x
Based on ai, the adder 39 acting as a difference calculator calculates the difference xbi−xci = Δ1i xai−xci = Δ2i. Here, the difference data Δ1i and Δ2i are, for example, 24 bits or less, and the number of bits may be fixed or variable.

The allocation circuit 40 converts the data string xci and the difference data Δ1i, Δ2i into user data (see FIG. 13).
(1 packet = 2034 bytes), and outputs the user data to the DVD formatting unit 34.

The video signal V is supplied to the A / D converter 31V
Then, the digital video signal is encoded into an MPEG format by a V encoder 32V, and then packed into user data shown in FIG. Then, the DVD formatter 34 packs the data into a format as shown in FIGS. The data formatted by the DVD formatter 34 is modulated by a modulation circuit 35 in a modulation method according to the disk, and a disk is manufactured based on the modulated data.

Next, a DVD-Audio disc according to a fifth embodiment will be described with reference to FIGS.
First, as shown in FIG. 42 (A), the data structure of the fifth embodiment roughly includes an AMG (audio manager), an SPS (still picture set) shown in detail in FIG. Title set)
Having. The ATS includes, in order from the beginning: an ATSI (ATS information); an audio object set (AOT) for an audio-only title shown in detail in FIGS.
(T-AOBS) and ATSI for backup.

The ATSI is in order from the beginning. ATSI-MAT (AT
SI management table) ATS-PGCIT (A
TS program chain information table).

As shown in detail in FIG. 43, the AOTT-AOBS is composed of a plurality of audio-only title audio objects (AOTT-AOB). Each of the AOTT-AOBs is constituted by a plurality of programs (PG), and each of the programs is constituted by a plurality of cells (ATS-C). AOTT-
AOB includes audio data only and audio data and real time information information.
Two types of AOTTs containing data (RTI data)
-AOB. Then, one or more types of AOTT-AOB are arranged in one disc or one song.

First AOT including only audio data
Each program of the T-AOB includes a plurality of audio cells (A
TS-C), and this audio cell is composed of only a plurality of audio packs.

Each program of the second AOTT-AOB including audio data and RTI data is constituted by a plurality of audio cells (ATS-C), and the audio cells include an RTI pack arranged at a second pack position, It is composed of audio packs arranged at other pack positions.

The A pack of the linear PCM is composed of 2048 bytes or less, and is composed of a 14 byte pack header and an A packet as shown in FIG. The A packet has a packet header of 17, 9 or 14 bytes, a private header shown in detail in FIG.
To 2011 bytes of audio data (linear PC
M).

As shown in FIG. 45, the private header includes: an 8-bit substream ID; a 3-bit reserved area; and a 5-bit UPC / EAN-ISRC (Universal Prism).
oduct Code / European Article Number-International S
and 8 bits of UPC / EAN-ISRC data; 8 bits of a private header length; 16 bits of a first access unit pointer; and 8 bytes of audio data information (A).
DI) and stuffing bytes of 0 to 8 bytes.

The ADI includes: 1-bit audio emphasis flag, 1-bit reserved area, 1-bit downmix mode, 1-bit downmix code validity, and 4-bit downmix. A code, and a quantization word length “1” of a 4-bit group “1”
And the quantization word length “2” of the 4-bit group “2”
A 4-bit audio sampling frequency fs1 of group "1"; a 4-bit audio sampling frequency fs2 of group "2"; a 4-bit reserved area; and a 4-bit multi-channel type. • 3 bit bit shift data of channel group “2” (see FIG. 47); 5 bit channel allocation information (see FIG. 53); 8 bit dynamic range control information; 8 × 2 bit reserved area It consists of.

8-bit (b7-b0) UPC / EAN
-In the ISRC data area, as shown in FIG.
Different data is arranged according to the C / EAN-ISRC number. That is, (1) When UPC / EAN-ISRC number = 1 Upper 2 bits b7, b6: Reserved Lower 6 bits b5 to b0: Country code (ISRC #
1) (2) When UPC / EAN-ISRC number = 2 Upper 2 bits b7, b6: Reserved Lower 6 bits b5 to b0: Country code (ISRC #
2) (3) When UPC / EAN-ISRC number = 3 Upper 2 bits b7, b6: Reserved Lower 6 bits b5 to b0: Copyright holder code (ISRC # 3) (4) UPC / EAN-ISRC number = In the case of 4, upper 2 bits b7 and b6: reserved Lower 6 bits b5 to b0: copyright holder code (ISRC # 4) (5) In case of UPC / EAN-ISRC number = 5 Upper 2 bits b7, b6: reserved lower 6 bits b5 to b0: Copyright holder code (ISRC # 5) (6) When UPC / EAN-ISRC number = 6 Upper 4 bits b7 to b4: Reserved Lower 4 bits b3 to b0: Recording ear (I
(7) When UPC / EAN-ISRC number = 7 Upper 4 bits b7 to b4: Reserved Lower 4 bits b3 to b0: Recording Year (I
SRC # 7)

Linear PCM which is actual data in A-pack
In the data area, the bits of the data of each channel of the group “2” are reduced and arranged to improve the S / N ratio and reduce bits. FIG. 47A shows PCM data of six channels (group “1” = Ch1 to Ch3, group “2” = Ch4 to Ch6) as an example, and the level range is MAX = 0 dB to MIN = −144 dB (24
Bit), and the value of each channel Ch is as follows. Lmax2> Lmax1 = Lmax3>Lmax4>Lmax5> Lmax6 Then, while keeping the word length of Ch1 to Ch3 of the group "1" as it is, the value of Ch2 is the largest in this example, so each of Ch4 to Ch6 of the group "2" Level (0
-Lmax2) Upshift by dB to reduce 0 to 4 bits on the LSB side. In the example shown in FIG.
This indicates that each level of h6 is up-shifted by the maximum number of bits = 4 and reduced to 20 bits.

Next, the configuration of the RTI pack will be described in detail with reference to FIG. This pack is composed of a 14-byte pack header and an RTI packet, and the RTI packet is composed of a 17- or 14-byte packet header, a private header, and 1 to 2015 bytes of RTI data. The RTI data is character information and playback control information relating to audio data.

The private header of the RTI packet includes: a 1-byte substream ID; a 2-byte UPC / EAN-ISRC number and data (these are simply referred to as ISRC in the figure); and a 1-byte private header length. And 1 byte of RTI information ID, and 0 to 7 bytes of stuffing byte. The above UPC / EAN-ISRC
The numbers and data are UPC / EAN-ISRC numbers and data relating to the copyright of the still picture contained in the SPCT pack.

The SPS (still picture set) is shown in FIG.
As shown in (A), it has SP address information (SPAI) and a plurality of SPUs (still picture units) # 1 to #n. Each of the SPUs # 1 to #n has a plurality of SPs # 1 to #n.
Each of the plurality of SPs # 1 to #n has a plurality of SPCT (still picture) packs. SPCT
The pack is composed of a 14-byte pack header and an SPCT packet, as shown in detail in FIG.
The PCT packet is composed of a packet header of 22 or 19 or 9 bytes and SPCT data of 2015 bytes or less. Here, one still image is compressed according to the MPEG1 or MPEG2 method, is composed of an I picture and an intra-coded picture, is divided in one picture cell, and is arranged as SPCT data of an SPCT pack. R in the packet header of the SPCT pack
As described in the TI pack, a UPC / EAN-ISRC number and data related to the copyright of a still picture may be included.

The ATSI-MAT shown in FIG.
Is composed of 2048 bytes (relative byte positions RBP0 to 2047) as shown in detail in FIG. 50, and, in order from the top: ATS identifier (AT) of 12 bytes (RBP0 to 11)
4 bytes (RBP12 to 15) of ATS end address (ATS-EA); 12 bytes (RBP16 to 27) of reserved area; and 4 bytes (RBP28 to 31) of ATSI. An end address (ATSI-EA) and a 2-byte (RBP32 to 33) version number (V
ERN), a reserved area of 94 bytes (RBP34 to 127), and an ATSI-MA of 4 bytes (RBP128 to 131).
An end address of T; a reserved area of 60 bytes (RBP132 to 191); and a V for AOTT of 4 bytes (RBP192 to 195).
The start address of the TS, and 4 bytes (RBP196-199) of AOTT A
A start address of the OBS or a start address of the VOBS for AOTT; a 4-byte (RBP 200 to 203) reserved area; and a 4-byte (RBP 204 to 207) ATS-PGC.
A start address of IT; a reserved area of 48 bytes (RBP 208 to 255); a 128 (16 × 8) byte (RBP 256 to 383)
AOB attributes for AOTT (AOTT-A
OB-ATR) or the attribute of the audio stream of the VOB for AOTT (AOTT-VOB-AST)
-ATR) and 288 (18 × 8) bytes (RBP 384 to 661)
For downmixing multi-channel audio data into two channels (ATS-DM-COEF)
T # 0 to # 15), a reserved area of 32 bytes (RBP 672 to 703), and an attribute (ATS-SPCT-ATR) of still picture data in AOBS for AOTT of 2 bytes (RBP 704 to 705). And 1342 bytes (RBP 706 to 2047).

128 (16 × 8) bytes (RBP256
383), this ATS is AOTT A
In case of having OBS, AOTT shown in detail in FIG.
-AOB-ATR is described. This AOTT-AOB
-ATR (b127 to b0) includes, in order from the MSB side: an audio encoding mode of 8 bits (b127 to b120); a reserved area of 8 bits (b119 to b112); and a 4-bit (b111 to b108). The number of quantization bits Q1 of the channel group "1"; the number of quantization bits Q2 of the channel group "2" of 4 bits (b107 to b104); and the number of quantization bits Q2 of the channel group "1" of 4 bits (b103 to b100). A sampling frequency fs1; a 4-bit (b99 to b96) sampling frequency fs2 of channel group “2”; a 3-bit (b95 to b93) multi-channel structure type; and a 5-bit (b92 to b88). Channel allocation: 8 bits × 11 (b87 to b0) reserved area

On the other hand, this ATS is used for AOTT A
When there is no OBS, AOTT-V shown in FIG.
OB-AST-ATR is described. This AOTT-V
The OB-AST-ATR (b127 to b0) includes, in order from the MSB side: an 8-bit (b127 to b120) audio encoding mode; an 8-bit (b119 to b112) reserved area; and a 4-bit (b111 to b111). b108) The number of quantization bits Q
A 4-bit (b107 to b104) reserved area; a 4-bit (b103 to b100) sampling frequency fs; a 4-bit (b99 to b96) reserved area; and 3 bits (b95 to b93). A 5-bit (b92-b88) channel allocation; a 3-bit (b87-b85) decoding audio stream number; a 5-bit (b84-b80) reserved area. DRC for MPEG audio of 2 bits (b79, b78); reserved area of 2 bits (b77, b76); number of compressed audio channels of 4 bits (b75 to b72); (B71-b0).

The above data is shown below in detail. However,
Since the number of quantization bits, the sampling frequency, and the multi-channel type are the same as those in FIG. 34, the description is omitted. (1) Audio encoding mode (b127 to b120) 000000000b: Linear PCM mode 00000001b: Reserved for compressed audio (Dolby Digital) 00000010b: Reserved for compressed audio (without MPEG2 extension) 000000011b: For compressed audio (with MPEG2 extension) 00000100b: Reserved for compressed audio (DTS) 00000101b: Reserved for compressed audio (SDDS) Other: Reserved for other encoding modes

(8) Channel assignment (b92 to b8)
8) FIG. 53 shows channel assignment information of groups “1” and “2” from 1 channel (monaural) to 6 channels. Incidentally, the symbols shown in the figure will be described below. C (mono): monaural L, R: 2-channel stereo Lf: multi-channel left front Rf: multi-channel right front C: multi-channel center LFE: multi-channel Low Frequency Effect S: multi-channel surround Ls: multi Channel left surround Rs: multi-channel right surround

(9) “0” or “1” of the number of decoding audio streams (b87 to b85) (10) DRC for MPEG audio (b79, b7)
8) 00b: DRC data does not exist in the MPEG audio stream. 01b: DRC data exists in the MPEG audio stream.

(11) Number of compressed audio channels (b7
5-b72) When the audio encoding mode is linear PCM audio, "1111b" 0000b: 1ch (mono) 0001b: 2ch (stereo) 0010b: 3ch 0011b: 4ch 0100b: 5ch 0101b: 6ch 0110b: 7ch 0111b: 8ch :on hold

In the area of 288 (18 × 16) bytes (RBP 384 to 671) shown in FIG. 50, table numbers “0” to “0” as shown in FIG. "1
5 "(ATS-DM-COEF)
T # 0 to # 15) are described in 18 bytes.

The two bytes (RBP704, RBP704) shown in FIG.
The area (705) is an attribute (ATS-SPC) of still picture data in AOBT for AOTT.
To describe T-ATR), as shown in detail in FIG. 55, in order from the MSB side: a 2-bit (b15, b14) video compression mode; a 2-bit (b13, b12) TV system; An aspect ratio of bits (b11, b10); a display mode of 2 bits (b9, b8); a reserved area of 2 bits (b7, b6); and a resolution of a source picture of 3 bits (b5 to b3). And a reserved area of 3 bits (b2 to b0).

The contents of the ATS-SPCT-ATR will be described in detail below. (1) Video compression mode (b15, b14) 00b: MPEG1 compatible 01b: MPEG2 compatible Other: reserved (2) TV system (b13, b12) 00b: 525/60 01b: 625/60 Other: reserved (3) Aspect ratio (B11, b10) 00b: 4: 3 11b: 16: 9 Other: reserved (4) Display mode (b9, b8) 00b: reserved 01b: reserved 10b: Only letterbox is permitted 11b: Not described. (5) Resolution of source picture (b5 to b3) Other: pending

The ATS-PGCIT shown in FIG.
(ATS program chain information
Table) is the audio title set PG shown in detail in FIG.
CI table information (ATS-PGCI
TI), n audio title sets PGCI search pointer (ATS-PGCI) shown in detail in FIGS.
-SRP # 1 to #n), and a plurality of audio title sets PGCI shown in detail in FIG.

The ATS-PGCITI is composed of 8 bytes as shown in detail in FIG. 57. It is composed of a 4-byte ATS-PGCIT end address. ATS-PGCI-SRP # 1- #
Each of n is composed of 8 bytes as shown in detail in FIG. 58, and sequentially from the top. • As shown in detail in FIG.
(ATS-PGC-CAT) and 4 bytes of ATS-PGCI end address.

ATS of 4 bytes (b31 to b0)
As shown in detail in FIG. 59, the categories of the PGC are, in order from the top, 1-bit (b31) entry type; 7-bit (b30 to b24) ATS audio title number (ATS-TTN); (B23, b22) block mode; 2-bit (b21, b20) block type; 4-bit (b19-b16) audio channel number; 8-bit (b15-b8) audio encoding mode And · an 8-bit (b7 to b0) reserved area.

The above category (ATS-PGC-CAT)
The details are described below. (1) Entry type (b31) 0b: Not entry PGC 1b: Entry PGC (2) Number of ATS audio titles (b30 to b24) Number of audio titles of this ATS is "1" to "99"
Describe in the range. (3) Block mode (b23, b22) 00b: Not ATS-PGC of ATS-PGC block 01b: First ATS-PG of ATS-PGC block
C 10b: Reserved 11b: Last ATS-PG of ATS-PGC block
C (4) Block type (b21, b20) 00b: Not a part of this block 01b: Block of difference only in audio coding mode 10b: Block of difference only in audio channel 11b: Difference of both audio coding mode and audio channel (5) Number of audio channels (b19 to b16) 0000b: 2 channels or less 0001b: Over 2 channels

As shown in detail in FIG. 60, each of the audio title sets PGCI (ATS-PGCI) shown in FIG. 56 is sequentially ordered from the beginning. An ATS program information table (ATS-PGIT) shown in detail in FIGS. 55 to 57; and an ATS cell playback information table (ATS-C) shown in detail in FIGS. 58 to 60. -PB
IT).

The ATS-PGC-GI is composed of 16 bytes (RBP0 to RBP15) as shown in detail in FIG.
S-PGC content (ATS-PGC-CNT); 4 bytes (RBP4-7) ATS-PGC playback time (ATS-PGC-PB-TM); 2 bytes (RBP8, 9) pending Area, 2-byte (RBP10, 11) ATS-PGIT start address, 2-byte (RBP12, 13) ATS-C-PBI
A start address of T, and a reserved area of 2 bytes (RBP14, 15).

ATS of 4 bytes (b31 to b0) described above
-PGC contents are in order from the beginning as shown in detail in FIG. 62: a 17-bit (b31 to b15) reserved area; a 7-bit (b14 to b8) program number; and an 8-bit (b7 to b0) cell. It is composed of numbers. The number of programs ranges from "1" to "99", and the number of cells ranges from "1" to "255".

The ATS program information table (ATS-PGIT) shown in FIG.
As shown in detail in FIG. 3, it is composed of n ATS program information (ATS-PGI) # 1 to #n. Each of ATS-PGI # 1 to #n is shown in FIG.
65 bytes, consisting of 20 bytes (RBP0 to 19) as shown in detail in FIG.
S-PG content (ATS-PG-CNT), 1-byte (RBP4) ATS-PG entry cell number, 1-byte (RBP5) reserved area, and 4-byte (RBP6-9) ATS -Start of first audio cell of PG-Presentation time (FAC-S-PTM)
ATS-PG playback time of 4 bytes (RBP10 to 13), ATS-PG pause time of 4 bytes (RBP14 to 17), and reserved area (copyright management) of 1 byte (RBP18) (For data CMI), and 1 byte (RBP19) reserved area.

The 2-byte (b31-0) ATS-P
As shown in detail in FIG. 65, the G content is: (1) 1-bit (b31) relationship between the previous and current PG (R
/ A) and 1-bit (b30) STC discontinuity flag (STC
-F), the number of attributes of three bits (b29 to b27) (A
TRN) and a 3-bit (b26 to b24) channel group (C
hGr) "2" bit shift data; 2 bit (b23, b22) reserved area; 1 bit (b21) downmix mode (D-
M), 1-bit (b20) downmix coefficient validity (illustrated *), 4-bit (b19-b16) downmix coefficient table number (DM-COEFTN), 1 bit each, It consists of RTI flags F15 to F0 of a total of 16 bits (b15 to b0).

The ATS cell playback information table (ATS-C-PBI) shown in FIG.
T) represents n ATS cells, as shown in detail in FIG.
Playback information (ATS-C-PB
I) It is composed of # 1 to #n. ATS-CP
Each of BIs # 1 to #n includes one as shown in FIG.
ATS-C index number of 1 byte (RBP0), and A byte of 1 byte (RBP1) as shown in detail in FIG.
TS-C type (ATS-C-TY), 2 bytes (RBP2, 3) reserved area, 4 bytes (RBP4-7) ATS-C start address, 4 bytes (RBP8-11) ) Of the ATS-C.

As shown in detail in FIG. 68, the ATS-C type of 1 byte (b7 to b0) includes:-a 2-bit (b7, b6) ATS cell element (ATS-B6);
A 2-bit (b5, b4) reserved area; and a 4-bit (b3-b0) ATS cell application (ATS-
C-Usage).

The contents of the data will be described in detail below. (1) ATS cell element (b7, b6) 00b: Audio cell consisting of only audio data 01b: Audio cell consisting of audio data and real-time information 10b: Silence cell consisting only of audio data for silence 11b: Composed of only still pictures Picture cell (2) ATS cell use (b3 to b0) 0000b: No description 0001b: Spotlight part Other: Reserved

Next, an encoding device according to a fifth embodiment will be described. 69 and 70 show the configuration and processing of the encoding device, respectively. The analog audio signal A is subjected to a sufficiently high sampling frequency (sampling period Δt) by the A / D converter 31, for example, 192 kHz.
, And converted into a 24-bit high-resolution PCM signal. In the subsequent bit shift / signal processing circuit 32, when compression is not performed, the PCM data converted by the A / D converter 31 is directly converted to a DV signal.
It is applied to the D formatting unit 34. On the other hand, when performing compression, the PCM data converted by the A / D converter 31 is compressed by the bit shift / signal processing circuit 32 according to the encoding mode, and then the DVD
Applied to the formatting unit 34 (steps S5 and S5).
6). In the bit shift / signal processing circuit 32, each channel of the group “2” is bit-shifted.

The video signal V is supplied to the A / D converter 31V
Then, the digital video signal is encoded into an MPEG format by the V encoder 32V and applied to the DVD formatter 34 (steps S1 and S2). The still picture signal SP is converted into a digital signal by the A / D converter 31SP, and then the digital still picture signal SP is encoded into the MPEG format by the compression encoder 32SP and applied to the DVD formatting section 34 (step S3). , S4). Further, the copyright information and the real-time text information (RTI) are transmitted through an interface (I / F) 40.
(Steps S7 and S8), and the character information and the disc identifier EX are applied to the DVD formatting unit 34 (steps S9 and S10).

Then, the DVD formatting unit 34 performs packing in the format as described above (step S11). The data formatted by the DVD formatting unit 34 is modulated by a modulation circuit 35 in a modulation method corresponding to the disk, and a disk is manufactured based on the modulated data, recorded once in the recording unit 38, and transmitted or received. The data is transmitted via the I / F 39 (step S12).

FIG. 71 shows a specific configuration of the decoding device according to the fifth embodiment, and FIG. 72 functionally shows the configuration of FIG. FIG. 73 shows the processing. FIG.
1. In FIG. 72, first, similarly to the case shown in FIG. 19, when a music selection, reproduction, fast-forward, and stop operation are performed by the operation unit 18 or the remote control device 19, the control unit 23 drives the drive device in accordance with the operation. 2 and the playback device 17
At the time of reproduction, after the pit data recorded on the DVD audio disk 1 is read by the drive device 2,
FM demodulation is performed.

In the reproducing apparatus 17, this signal is sent to the still image and V pack detecting section 3 and the A and RTI pack detecting sections 9. When a still image pack and a V pack are recorded on the disk 1, the still image and V pack detection unit 3 detects the still image pack and the V pack in the reproduced data and sets the control parameters in the parameter unit 8. At the same time, the still image pack and the V pack are sequentially written into the still image and V pack buffer 4. The still image and the user data (video signal, still image information) in the V pack written in the still image and V pack buffer 4 are transferred to the still image pack and the SCR in the V pack by the buffer extracting unit 5 (see FIG. 13). Are extracted in the order of packs and in the order of output time, and then output as analog video signals via the decompression and image conversion unit 6, the D / A conversion unit 7, and the video output terminals 15, 15 '.

The A and RTI pack detector 9 detects the A and RTI packs in the reproduced data, sets the control parameters in the parameter section 14, and stores the A and RTI packs in the A and RTI pack buffers 10. Write sequentially. A and user data (audio signal, real-time information) in the A and RTI packs written in the A and RTI pack buffers 10
Are packed by the buffer extracting unit 11 in the order of packing, and
They are taken out in order of output time. The audio signal is converted to a PCM conversion and bit shift / signal processing unit 12, D / A
The signal is output as an analog audio signal via the conversion unit 13 and the audio output terminal 16. The real-time information is sent to the display signal generator 20 to generate a display signal. The display signal is output through the display signal output terminal 22 or is output to the built-in character display 21.

Referring to FIG. 73, the processing of this decoding device will be described. First, the recording data is read out by accessing the disk 1 (step S20). Then, in each of the separation steps S21 to S29, a video signal, a still image signal, an audio signal, copyright information and real-time information (RTI), a character Information and disc identifier (EX)
Are separated. Next, each decoding step S22 to S3
At 0, each separated data is decoded and then synchronously reproduced (steps S31 and S32).

Here, there are the following three types of processing for reproducing the still picture SP. 1) When the still image SP is obtained, the reproduction of the audio signal A is interrupted and muted. 2) When the still picture SP is obtained, the still picture SP is reproduced together with the audio signal A based on the time control signal. 3) When the still image SP is obtained, the page is played back based on the page turning command instructed by the user. At this time, the audio signal A is reproduced as it is.

When it is necessary to synchronize a still image with audio, the time control signal for real-time synchronization is represented by the time control signal shown in FIG.
Still picture to be added to ATSI 2 (B)
Control information table SPCI
It is placed in the time control data information (SPCIT-TCDI) below T.

[0139] Still picture page control command information (SPPI) containing a page turning command is placed below SPCIT. As described above, SPCIT is SPCIT general information (SPCIT-GI) of general information.
, Time control data information (SPCIT-TCDI), and still picture page control command information (SPPI).

Further, the still picture data of the SPCT pack shown in FIG. 49 may include side information for controlling a still picture page. The page control data specified by the side information is interpreted while referring to the SPPI.

If there is not enough space to store the still picture data, the RTI data of the RTI pack may include the side information for controlling the still picture page. acceptable.

FIG. 74 shows, as shown in FIG. 42 (B), time information and a page turning command for synchronizing a still image with audio are recorded on a disk 110 such as a DVD audio disk or a DVD video disk. 1 shows an apparatus for reproducing a signal. The disk drive 111 is controlled by a drive control circuit 112, and the disk 110 is driven by the disk drive 111 to read out a recording signal. This signal is subjected to EFM demodulation by a demodulation circuit / error correction circuit 113 and then error correction. After that, a stream signal excluding control data and DSI data is written to a track buffer 114 by a write control circuit 115.
SI data is stored in the system buffer 117 and DSI, respectively.
The data is written to the buffer 122. DSI buffer 122
Is decoded by the DSI decoder 151 and output.

The system controller 132 controls the reproduction based on the control data written in the system buffer 117. The system controller 132 includes an operation unit 130, a display unit 131, a readable / writable system parameter memory 133, a reproduction-only system parameter memory 134, and a read / write
A writable general-purpose parameter memory 135 and a system timer 136 are connected.

The stream signal written to the track buffer 114 is read by the read control circuit 116, and then the still image pack, the RTI pack, the VBV pack, the sub-picture pack, the VBI pack, and the audio Each of the packs is separated into a still image buffer 147 and an RT.
The I buffer 148, the VBV buffer 118, the sub picture buffer 119, the VBI buffer 120, and the audio buffer 121 are stored. Each of the still image pack and the RTI pack is a still image decoder 14.
9. The RTI decoder 150 decodes and outputs the RTI data, and the RTI data decoded by the RTI decoder 150 is stored in the buffer 150 '.

The VBV pack is decoded by the video decoder 123 and then sent to the adder 127 via the letterbox converter 126. The sub-picture pack and the VBI pack correspond to the sub-picture decoder 1 respectively.
24, decoded by the VBI decoder 125 and sent to the adder 127, where the video signals are synthesized. The audio pack is sent to the audio decoder 129, in which the format decomposer 141, the channel separator 142, and the D / A converter 14
4 and 145, it is converted to an analog signal.

Next, a still picture reproducing process will be described with reference to FIGS. 75 and 76. There are two types of reproduction processing (types "1" and "2"). In FIG. 75, when reproduction is started, still image data is accessed and accumulated in the still image buffer 147 (step S61). ). At this time, the audio data is not reproduced for 1 to 3 seconds and remains silent. Next, it is determined whether or not the type is "1" (step S62). If the type is "1", the audio data is accessed and the time data shown in FIG.
Control data information (SPCI
(T-TCDI), that is, synchronous reproduction with still image data based on time control information (step S63). On the other hand, if the type is not "1", the audio data is accessed and reproduced (step S64).

In this type "2" processing, when an interrupt is generated by a user command as shown in FIG. 76, the command is interpreted (step S65), and the command and the still picture page control command information (SPPI) are written. "Next" of the still image,
Playback such as turning the page of "return to the front", "erasing", and "enlarging" is performed (step S66). This type "2"
Does not synchronize with the audio signal and does not affect the reproduction of the audio signal.

Next, a modification of the audio decoder 129 will be described in detail with reference to FIGS. In this modification, a sample rate converter 143 is added.
1 and then separated by channel separator 142 into PCM data for each channel. Then, the system controller 132 determines the sampling frequency fs of the audio data decomposed by the format decomposer 141. If the sampling frequency fs is 48 kHz of the first system, the audio data is transmitted from the channel demultiplexer 142 to the switches 146 and 147. , To the D / A converters 144 and 145 as it is, and in the case of 44.1 kHz of the second system, the sample rate converter 14
As shown in FIG. 78 (A), 48k of the first system
Hz up-sampled audio data via switches 146 and 147 to D / A converters 144 and 14
Send to 5.

Also, in the case of 96 kHz of the first system, the signal is directly sent from the channel separator 142 to the D / A converters 44 and 45 via the switches 146 and 147.
Also in the case of 88.2 kHz of the second system, the sample rate converter 143 up-samples the signal to 96 kHz of the first system as shown in FIG.
The signals are sent to D / A converters 44 and 45 via 46 and 147. Therefore, the D / A converters 144 and 145 can be configured with only the first system. The sampling frequency fs of the D / A converters 144 and 145 is controlled by the system controller 132.

Note that instead of converting the sampling frequency fs from the second system to the first system, the 48 kHz and 96 kHz of the first system are converted to the second system as shown in FIG.
May be converted to 44.1 kHz and 88.2 kHz of the system. Further, even if the sampling frequency fs of each channel of the multi-channel signal is the first system,
For example, as shown in FIG.
In the case of Hz, reproduction sound quality can be improved by up-sampling to 96 kHz and D / A converting all channels to 96 kHz.

Next, a reproducing apparatus for superimposing and displaying copyright information will be described with reference to FIGS. In FIG. 79, the still image pack is the still image buffer 1
The still image data is sent to the still image decoder 149 via the decoder 47 and the still image data is decoded.
Is applied to The RTI pack is stored in the RTI buffer 1
The data is sent to the RTI decoder 150 via the decoder 48 and decoded, and the decoded data is accumulated in the buffer 150 '. At this time, the RTI pack stores the copyright data (FIG. 45,
In the case of including the UPC / EAN-ISRC data shown in FIG. 46, the text character information is converted into character image data by the image conversion unit 200, applied to the adder 201, combined with a still image, and output to the outside. Alternatively, it is output to the outside via the switch 203.

The audio pack is decomposed by the format decomposer 141 via the audio buffer 121, and each data is stored in the buffer 141 '. At this time, when the audio pack includes copyright data (UPC / EAN-ISRC data shown in FIGS. 45 and 46), the copyright data is converted into text character information by the code conversion unit 202, Output to the outside.

The operation will be described with reference to FIG. First,
When the instruction to display the copyright information of the still image is transmitted from the operation unit 130, the still image decoded from the still image pack and the copyright information decoded from the RTI pack and converted into image data are added to the adder. The output is added by 201 (step S71 → S72). On the other hand, when there is no instruction to display the copyright information of the still image, the copyright information decoded from the RTI pack is not added (step S71).
(S73) Then, it is determined whether or not an instruction to display the copyright information of the audio signal is transmitted from the operation unit 130 (step S74). If there is a display instruction, the copyright information decoded from the audio pack is converted into text character information by the code conversion unit 202, and the RTI output is performed via the switch 203 (step S).
74 → S75) On the other hand, if there is no display instruction, RTI
Do not output. This processing is performed in units of cells or tracks.

Here, the audio decoder having the configuration shown in FIG. 77 and the copyright information reproducing device (and audio decoder) shown in FIG. 79 are used in addition to the method used by being incorporated as a part of the disk reproducing device shown in FIG. In addition, it can be configured as an IC chip as a single product, and used as a part of a DVD video playback device or a personal computer.

Next, an embodiment for transmitting a digital audio signal formatted as described above via a communication line will be described. First, the packing device on the transmission side will be described with reference to FIGS. As shown in FIG. 81, the packing device 30
, Buffer memory 30B, control circuit 29
, An operation unit 27 and a display 28. And
82 to 85, first, a video signal V, a still image signal SP, an audio signal A, and real-time information R
When the TI and the disc identifier (EX) are input, in step S100, an audio pack is generated (step S101), a video pack is generated (step S102), and a still image pack is generated (step S102), as shown in detail in FIG. Next, a real-time text is generated (step S104).

Next, the cell (ATS-C) is managed (step S200), and then PTT (part of title) is managed.
(Step S300), and then the title (AO
TT-AOB) (step S400), and then a title set (AOTT-AOBS) (step S500) In the following step S600, a title set is generated as shown in detail in FIG. (Step S601) Then, a menu is generated (Step S602), and then the ATS-PGCI is generated.
(Step S603), and then generates PGIT composed of PG contents including bit shifts to generate PGCI, thereby generating ATS-PGCIT.
Is generated (step S604). Next, ATSI is generated by generating an MAT of attributes and coefficients (step S605). Next, an AMG is generated (step S7).
00), and finally generates a TOC (step S80).
0).

Next, when transmitting the digital audio signal formatted as described above via a communication line, the transmission data stored in the transmission buffer is divided into predetermined lengths as shown in FIG. Then, a packet including a destination address is added to the beginning of the packet (step S42), and the packet is output on the network (step S43).

Next, the data receiving side will be described with reference to FIGS. As shown in FIG. 86, the unpacking device on the data receiving side includes an unpacking processing unit 60.
, A buffer memory 60B, and a parameter memory 56.
, A control circuit 59, an operation unit 57 and a display 58. First, as shown in FIG. 87, the header is removed from the packet received from the network (step S51), and the received data is restored (step S5).
2) and then transfer this to the memory (step S5)
3).

Next, as shown in FIGS. 88 to 90, first,
AMG is decoded to detect ATS (step S11).
00), and in subsequent step S1200, A
In order to decode the TSI, the category of the ATS-PGCI is decoded as shown in detail in FIG. 89 (step S1201), and then the PGIT composed of the PG content including the bit shift is decoded (step S120).
2) Then, the attributes and coefficients of the MAT are decoded (step S1203), and these decoded parameters are set in the parameter memory 56 (step S1).
204).

Next, when the reproduction is started, the pack is identified (step S1300), and in the succeeding step S1400, the audio pack is decoded as shown in detail in FIG. 90 (step S140) in order to decode the pack.
1), then decode the video pack (step S1)
402), then decode the still image pack (step S1403), and then decode the real-time text (step S1404). Then, an audio signal, a video signal, a still image signal, and a real-time text signal decoded from each of these packs are output (step S1500), and the processing of steps S1300 to S1500 is repeated during reproduction.

The encoding device and the decoding device are:
The above-described encoding method and decoding method can be also realized by storing a computer program in an IC chip such as a ROM and operating a CPU (Central Processing Unit) of the computer using the program. The present invention can be applied not only to transmission via a recording medium such as a DVD, but also to transmission via a communication line such as the Internet or a karaoke communication line and processing on a reproduction side by hardware or an application on a PC. Can be applied.

[0162]

As described above, according to the present invention, D
Instead of a VD video title set and a management area containing information for managing the DVD video title set,
A DVD audio title set that does not include a playback control pack and has audio data and still image data;
Since the management area including the information for managing the DVD audio title set is provided, the user can easily reproduce the audio signal when mainly recording the audio signal, which is convenient for the user, and simplifies the management in real time. be able to. According to the invention, a first pack having audio data as actual data, a second pack having real-time information data relating to audio data as actual data, and a third pack having still picture data relating to audio data as actual data. When reproducing the data structure having the packs of (3) and (3), the data is reproduced by three buffers and decoders, so that it is not necessary to decode the still image at high speed, so that the configuration can be made at low cost. In addition, a still image can be reproduced in synchronization with an audio signal, and a page can be turned over regardless of reproduction of an audio signal. Further, according to the present invention, when audio data and multi-channel audio data are A / D converted at two sampling frequencies, D / A conversion is performed in one system. Therefore, it is not necessary to provide the A / D converter, and therefore, the configuration can be made at a low cost. Further, according to the present invention, when copyright data relating to audio data and still picture data is recorded on a disc, the still picture data and the copyright data are combined and superimposed and displayed. It is effective for

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing one embodiment of a DVD-video format and a DVD-audio format according to the present invention.

FIG. 2 is an explanatory diagram showing a format of an audio manager (AMG) of FIG. 1 in detail.

FIG. 3 is an explanatory diagram showing a format of an audio title set (ATS) of FIG. 1 in detail.

FIG. 4 is an explanatory diagram showing a format of audio manager information (AMGI) of FIG. 2 in detail.

FIG. 5 is an explanatory diagram showing in detail a format of an audio title set attribute table (ATS-ATRT) of FIG. 4;

6 is an explanatory diagram showing the format of the audio title set attribute data (ATS-ATR) of FIG. 5 in detail.

7 is an explanatory diagram showing the format of the audio title set information (ATSI) of FIG. 3 in detail.

8 is an audio title set information management table (ATSI-MAT) shown in FIG. 7;
FIG. 3 is an explanatory diagram showing the format of the file in detail.

FIG. 9 shows the audio title set menu, audio stream, and attribute data (ATSM) shown in FIG.
FIG. 2 is an explanatory diagram showing (AST-ATR) in detail.

FIG. 10 shows an audio title set audio stream attribute table (ATS-AS) shown in FIG.
FIG. 4 is an explanatory diagram showing the format of (T-ATRT) in detail.

FIG. 11 is an explanatory diagram showing in detail attribute data (ATS-AST-ATR) of each audio stream in FIG. 10;

FIG. 12 is an explanatory diagram showing an audio content block unit (ACBU) of FIG. 1;

FIG. 13 is an explanatory diagram showing the formats of the audio pack and the video pack of FIG. 12 in detail.

FIG. 14 shows the audio control (A-CO) shown in FIG.
It is an explanatory view showing the format of a (NT) pack in detail.

FIG. 15 is an explanatory diagram showing in detail a format of an audio character display (ACD) area in FIG. 14;

FIG. 16 is an explanatory diagram showing an example displayed by the namespace information of FIG. 15;

17 is an audio search data (ASD) shown in FIG. 14;
It is explanatory drawing which shows the format of an area in detail.

FIG. 18 is an explanatory diagram showing a modification of the audio content block unit of FIG. 1;

FIG. 19 is a block diagram showing a DVD-Audio disc reproducing apparatus according to the present invention.

FIG. 20 is a block diagram functionally showing the playback device of FIG. 19;

FIG. 21 is an explanatory diagram showing in detail a format of audio manager information (AMGI) in the second embodiment.

FIG. 22 is an explanatory diagram showing the TOC information of FIG. 21 in detail.

FIG. 23 is an explanatory diagram showing in detail a format of audio title set information (ATSI) in a modification of the second embodiment.

FIG. 24 is a block diagram showing a DVD-Audio disc reproducing apparatus according to a second embodiment.

FIG. 25 is a block diagram functionally showing the playback device of FIG. 24.

FIG. 26 is a block diagram illustrating TOC information and a playback device according to a third embodiment.

FIG. 27 is a flowchart illustrating an AV synchronous reproduction process.

FIG. 28 is a flowchart illustrating an AV synchronous reproduction process.

FIG. 29 is an explanatory diagram showing a basic format of a DVD-Audio disc according to the fourth embodiment.

FIG. 30 is an explanatory diagram showing an audio data structure of the DVD-audio disc of FIG. 29.

FIG. 31 is an explanatory diagram showing a basic format of a DVD-Van disc.

FIG. 32 is an explanatory diagram showing a basic format of a DVD video disk.

FIG. 33 is an explanatory diagram showing a basic format of a DVD-Avd disk.

FIG. 34 is an explanatory diagram showing AOTT-AOB-ATR in the DVD-Audio disc of the fourth embodiment.

FIG. 35 is an explanatory diagram showing a private header of the linear PCM in the DVD-Avd disc of the fourth embodiment.

FIG. 36 is a flowchart showing ATS and still image reproduction processing by the reproduction device of the fourth embodiment.

FIG. 37 is a flowchart showing frame reproduction processing according to the sampling frequency of audio data by the reproduction device of the fourth embodiment.

FIG. 38 is a flowchart showing an emphasis reproduction process of audio data by the reproduction device of the fourth embodiment.

FIG. 39 is a flowchart showing emphasis reproduction processing of audio data by the reproduction device of the fourth embodiment.

FIG. 40 is a block diagram showing an embodiment of an audio signal encoding device according to the present invention.

FIG. 41 is a block diagram showing in detail the signal processing circuit of FIG. 40;

FIG. 42 is an explanatory diagram showing a data structure of the fifth embodiment.

FIG. 43 shows an audio object set (AOTT-AOB) for the audio-only title shown in FIG. 42;
It is explanatory drawing which shows S) in detail.

FIG. 44 is an explanatory diagram showing an example of the audio pack of FIG. 43 in detail;

FIG. 45 is an explanatory diagram showing the private header of FIG. 44 in detail.

FIG. 46 is an explanatory diagram showing the UPC / EAN-ISRC data of FIG. 45 in detail;

FIG. 47 is an explanatory diagram showing a bit shift of the audio data of FIG. 44;

FIG. 48 is an explanatory diagram showing in detail the real-time information (RTI) pack of FIG. 43;

FIG. 49 is an explanatory diagram showing the still picture set (SPS) in FIG. 43 in detail.

FIG. 50 shows the audio title set information management table (ATSI) shown in FIG.
FIG. 4 is an explanatory diagram showing (-MAT)) in detail.

FIG. 51 shows an audio object attribute (AOTT-) for the audio-only title shown in FIG.
FIG. 3 is an explanatory diagram showing (OB-ATR) in detail.

FIG. 52 is an explanatory diagram showing in detail an audio-only title video object audio stream attribute (AOTT-VOB-AST-ATR) of FIG. 50;

FIG. 53 is an explanatory diagram showing the channel assignment information of FIGS. 51 and 52 in detail;

FIG. 54 shows the downmix coefficient (ATS-DM) shown in FIG.
FIG. 3 is an explanatory diagram showing (COEFT) in detail.

FIG. 55 is an explanatory diagram showing in detail a still picture data attribute (ATS-SPCT-ATR) shown in FIG. 50;

FIG. 56 shows the audio title set program chain information table (A in FIG. 42);
FIG. 4 is an explanatory diagram showing TS-PGCIT) in detail.

FIG. 57 is an explanatory diagram showing the ATS-PGCIT information (ATS-PGCITI) of FIG. 56 in detail;

FIG. 58 is an explanatory diagram showing an ATS-PGCI search pointer (ATS-PGCI-SRP) in FIG. 56 in detail;

FIG. 59 shows the ATS-PGC category (ATS-
FIG. 4 is an explanatory diagram showing the details of the PGCI-CAT.

FIG. 60 shows the audio title set program chain information (ATS-PG) shown in FIG.
FIG. 4 is an explanatory diagram showing CI) in detail.

61 is an explanatory diagram showing the ATS-PGC general information (ATS-PGC-GI) of FIG. 60 in detail.

FIG. 62 shows the ATS-PGC contents (ATS
FIG. 3 is an explanatory diagram showing (PGC-CNT) in detail.

FIG. 63 is an explanatory diagram showing an ATS program information table (ATS-PGIT) in FIG. 60 in detail;

FIG. 64 is an explanatory diagram showing ATS program information (ATS-PGI) of FIG. 63 in detail;

FIG. 65 shows ATS-PG contents (ATS-PG content) shown in FIG. 64;
FIG. 3 is an explanatory diagram showing (PG-CNT) in detail.

FIG. 66 is an explanatory diagram showing in detail an ATS cell playback information table (ATS-C-PBIT) of FIG. 63;

FIG. 67 is an explanatory diagram showing the ATS cell playback information (ATS-C-PBI) of FIG. 66 in detail;

68. The ATS-C type shown in FIG. 67 (ATS-CT)
It is explanatory drawing which shows Y) in detail.

FIG. 69 is a block diagram illustrating an encoding device according to a fifth embodiment.

70 is a flowchart showing the processing of the encoding device in FIG. 69.

FIG. 71 is a block diagram illustrating a decoding device according to a fifth embodiment.

FIG. 72 is a block diagram functionally showing the decoding device of FIG. 71.

FIG. 73 is a flowchart showing the processing of the decoding device in FIGS. 71 and 72.

FIG. 74 is a block diagram showing in detail a decoding device according to a fifth embodiment;

75 is a flowchart showing a reproduction process of an audio signal and still image data by the decoding device in FIG. 74.

76 is a flowchart showing still image page turning processing of the decoding device in FIG. 74.

FIG. 77 is a block diagram showing a modification of the audio decoder of FIG. 74.

FIG. 78 is an explanatory diagram showing the processing of the sample rate converter in FIG. 77;

FIG. 79 is a block diagram showing in detail a copyright data display device of the decoding device of the fifth embodiment.

FIG. 80 is a flowchart showing copyright data display processing of the apparatus shown in FIG. 79;

FIG. 81 is a block diagram showing a packing device for transmitting an audio signal according to the fifth embodiment.

FIG. 82 is a flowchart showing a packing process of the packing device of FIG. 81.

FIG. 83 is a flowchart showing the pack generation processing of FIG. 82 in detail;

FIG. 84 is a flowchart showing the ATS generation processing of FIG. 82 in detail;

FIG. 85 is a flowchart showing a transmission process of the packing device of FIG. 81.

FIG. 86 is a block diagram showing an unpacking device for transmitting an audio signal according to the fifth embodiment.

87 is a flowchart showing a receiving process of the unpacking device of FIG. 86.

FIG. 88 is a flowchart showing an unpacking process of the unpacking device of FIG. 86.

FIG. 89 is a flowchart showing the ATSI decoding processing of FIG. 81 in detail.

FIG. 90 is a flowchart showing the pack decoding process of FIG. 88 in detail;

[Explanation of symbols]

VMG Video manager (second management area) VTS <1> Video title set AMG Audio manager (first management area) ATS <1>, ATS <2> Audio title set A pack First pack AOB audio object AOBS audio Object set ATSI Audio title set information ATSI-MAT Audio title set information management table RTI pack Second pack SPCT pack Third pack 121 Audio buffer (first buffer) 128 Demultiplexer (pack distribution means) 129 Audio decoder (first decoder) 132 System controller (sampling frequency determination means) 143 Sample rate Converter (rate conversion means) 144, 145 D / A converter (D / A conversion means) 147 Still picture buffer (third buffer) 148 RTI buffer (second buffer) 149 Still picture decoder (third decoder) 150 RTI decoder (second decoder) 200 image conversion unit 201 adder (synthesis display means) 202 code conversion unit

Claims (25)

[Claims] An audio title set including audio data and still image data without a pack for reproduction control; and a first management area including information for managing the audio title set. And an audio disc on which a data structure not including a second management area including information for managing the video title set is recorded. 2. The audio data in the audio title set includes first audio data A / D converted at a first sampling frequency, and second audio data A / D converted at a second sampling frequency. The audio disc according to claim 1, wherein the audio disc includes at least one of data. 3. The audio data is subjected to A / D conversion at a first sampling frequency that is a multiple of 48 kHz and has a frame rate of 1/600 second, and 44.1k.
2. The audio disc according to claim 1, wherein the data is A / D converted at a second sampling frequency that is a multiple of Hz and has a frame rate of 1 / 551.25 seconds. 4. The method according to claim 1, wherein the first sampling frequency is 192.
kHz, and the second sampling frequency is 17
4. The audio disc according to claim 3, wherein reproduction control information for prohibiting emphasis reproduction at 6.4 kHz is recorded in the first management area. 5. A video title set including an audio title set including audio data and still picture data without including a playback control pack, and a first management area including information for managing the audio title set. And a second management area including information for managing the video title set. 6. A video title set including an audio title set including audio data and still picture data without including a playback control pack, and a first management area including information for managing the audio title set. And a second management area including information for managing the video title set, wherein the audio data in the audio title set is A / D at a first sampling frequency. An audio signal encoding device comprising means for formatting into a data structure including at least one of the converted first audio data and the second audio data A / D converted at the second sampling frequency. 7. A video title set including an audio title set including audio data and still picture data without including a playback control pack, and a first management area including information for managing the audio title set. And a second management area including information for managing the video title set, wherein the audio data is A / D converted at a first sampling frequency that is a multiple of 48 kHz. Data with a frame rate of 1/600 second and 44.1 kHz
An audio signal encoding device comprising means for formatting into a data structure that is A / D converted at a second sampling frequency that is a multiple of z and has a frame rate of 1 / 551.25 seconds. 8. A video title set including an audio title set including audio data and still picture data without including a playback control pack, and a first management area including information for managing the audio title set. And a second management area including information for managing the video title set, wherein the audio data is A / D converted at a first sampling frequency that is a multiple of 48 kHz. Data with a frame rate of 1/600 second and 44.1 kHz
The data is A / D-converted at a second sampling frequency that is a multiple of z and has a frame rate of 1 / 551.25 seconds. When the first sampling frequency is 192 kHz, and when the second sampling frequency is 176.4 kHz
An audio signal encoding apparatus comprising: means for formatting reproduction control information for inhibiting emphasis reproduction in the case of z into a data structure recorded in the first management area. 9. The apparatus for playing back an audio disc according to claim 1, wherein audio data in an audio title set and audio data in an audio title set are based on information in the first management area without being based on the playback control pack. An audio disc reproducing apparatus having means for reproducing still image data. 10. An apparatus for playing back an audio disc according to claim 2 or 3, wherein the means for D / A-converting and playing back the A / D-converted audio data at the first sampling frequency; Means for D / A-converting and reproducing audio data that has been A / D-converted at a sampling frequency of 2. 11. The apparatus according to claim 10, further comprising means for displaying a sampling frequency of said audio data being reproduced.
An audio disc playback device as described in the above. 12. The audio disk reproducing apparatus according to claim 4, wherein the audio data in which the reproduction control information for prohibiting the emphasis reproduction is recorded is not emphasis-reproduced. . 13. An audio title set management area (A) including a plurality of audio title sets having audio data and still picture data, menu information, and information for managing each of the plurality of audio title sets.
TSI), and a first management area (AMGI) including information for managing the plurality of audio title sets and the menu information.
And an audio disc on which a data structure having TOC information is recorded. 14. An audio title set management area (A) including a plurality of audio title sets having audio data and still picture data, menu information, and information for managing each of the plurality of audio title sets.
TSI), and a first management area (AMGI) including information for managing the plurality of audio title sets and the menu information.
And an audio signal encoding device comprising means for formatting the TOC information into a data structure. 15. A plurality of audio objects (AO)
B), comprising: an audio title set (ATS) including B) and a still picture set (SPS), wherein the AOB includes only a first pack having audio data as actual data; And two types of second AOBs composed of a first pack and a second pack having real-time information data relating to the audio data as actual data, and the SPS includes still picture data relating to the audio data. An apparatus for reproducing a data structure having a third pack, comprising: a pack distribution unit that distributes the first, second, and third packs; and a second storage unit that stores the first pack distributed by the pack distribution unit. 1 buffer; and a first buffer stored in the first buffer. First decoding means for decoding audio data based on the pack of the second pack, a second buffer for storing the second pack allocated by the pack allocation means, and a second buffer stored in the second buffer. Second decoding means for decoding real-time information data based on the pack; third buffer for storing the third pack allocated by the pack allocation means; and third buffer stored in the third buffer. And a third decoding means for decoding the still picture data based on the pack. 16. A third pack is read from the data structure and stored in the third buffer, and then the first pack is read from the data structure and stored in the first buffer and stored in the first buffer. 16. The audio reproducing apparatus according to claim 15, further comprising: playing means for reading a third pack from the third buffer and displaying a still picture while reading the audio signal from the buffer. 17. The ATS according to claim 17, wherein the ATS includes time control information for reproducing a still picture, and wherein the playing means reproduces the audio signal and the still picture in synchronization based on the time control information. Item 17. The audio reproducing device according to Item 16. 18. The still picture according to claim 16, wherein said playing means displays a still picture by turning pages irrespective of reproduction of an audio signal based on a page turning instruction instructed via an operation unit. An audio playback device according to claim 1. 19. The first audio data A / D converted at least at the sampling frequency of the first system and the second audio data A / D converted at the sampling frequency of the second system.
An audio data reproducing apparatus for reproducing a data structure in which audio data of the audio data is selectively transmitted together with the sampling frequency data, a means for determining a sampling frequency of audio data reproduced from a disc based on the sampling frequency data; Rate conversion means for rate-converting the first-system audio data to a second-system sampling frequency based on the following formula: D / A conversion means for D / A-converting the audio data at the second-system sampling frequency An audio playback device comprising: 20. When each channel of a multi-channel audio signal is A / D-converted at a sampling frequency of a first system and a sampling frequency of a second system, the rate conversion means operates at a sampling frequency of the first system. 20. The audio reproducing apparatus according to claim 19, wherein the A / D-converted channels are rate-converted to the sampling frequency of the second system to make the sampling frequencies of the respective channels uniform. 21. The audio reproducing apparatus according to claim 19, further comprising means for displaying a sampling frequency of an audio signal being reproduced. 22. An apparatus for reproducing a data structure including audio data, copyright data relating to the audio data, and still picture data relating to the audio data, wherein during reproduction of the audio data, copyright information relating to the audio data is reproduced. An audio reproducing apparatus having means for combining and displaying rights data and still picture data. 23. An apparatus for reproducing a data structure having audio data, still picture data relating to the audio data, and copyright data relating to the still picture data, wherein the still picture data is reproduced during reproduction of the audio data. And an audio reproducing apparatus comprising means for combining and displaying copyright data relating to the still picture data. 24. An audio reproducing apparatus according to claim 15, wherein said audio reproducing apparatus reproduces said data structure recorded on an audio disc. 25. The audio reproducing apparatus according to claim 15, wherein the data structure transmitted via a recording medium or a communication medium is reproduced by hardware or a computer application. Audio playback device.