JP2004006034A - Audio disk and decoding device of audio signal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an audio disk which is convenient by enabling a user to easily reproduce audio signals in recording the audio signals mainly and makes it easy to manage real time. <P>SOLUTION: A format of a DVD audio disk does not include a VTS (video title set) but is composed only of an ATS (audio title set). The ATS consists of an audio manager (AMG), an audio manager menu (AMGM) for video and audio, and an ATS (1) and an ATS (2) managed by an AMGI (audio manager information) in the AMG. The ATS (1) and the ATS (2) do not include an A-CONT pack but consist of an A pack and still picture packs. A lot of the still picture packs are not arranged in the A pack but about one pack is arranged per track. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to an audio disk and a decoding device for data recorded on the audio disk.

ＣＤ A CD (compact disc) is known as a conventional optical disc for audio reproduction. A DVD (digital video disk) is known as an optical disk having a higher density than a CD.

However, in a DVD (hereinafter, 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.

オ ー デ ィ オ Also, audio users have a wider range of uses than video, so a simple playback method is required by providing a TOC (Table Of Contents) area like a CD. However, in the case of DVD-video, a navigation control pack (CONT pack), a plurality of video (V) packs and an audio (A) pack constitute a video content block unit, and playback of the V and A packs is controlled by the CONT pack. Therefore, there is a problem in that even if an audio signal is mainly recorded, it cannot be easily reproduced for the user, and the usability is poor.

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

Therefore, the present invention provides an audio disk and a data storage device on which data can be easily reproduced and used by a user when an audio signal is mainly recorded, and the data can be easily managed in real time. It is an object of the present invention to provide a decoding device.

In order to achieve the above object, the present invention comprises the following means 1) and 2).
That is,
1) The recording area has an audio title set (ATS) including a plurality of audio objects (AOB) and a still picture set (SPS),
The digital audio signals recorded in the plurality of audio objects (AOBs) are obtained by assigning analog audio signals to a first multi-channel group and a second multi-channel group, respectively. Each of the second channel groups is generated by being quantized with a different quantization bit number and sampling frequency, and only the channels of the second channel group are bit-shifted in the up direction by a common bit shift amount and the bit shift is performed. Recorded as each digital audio signal with the word length reduced by the amount,
The number of quantization bits and the sampling frequency of each of the first channel group and the second channel group of the digital audio signal recorded in the plurality of audio objects (AOB), and the channel of the second channel group Are recorded in the playback control information (ATSI) of the audio title set (ATS) together with a common bit shift amount for the audio title set (ATS) and channel assignment information for specifying the assigned channels of the first channel group and the second channel group, respectively. An audio disc on which a data structure in which the still picture set (SPS) includes still picture data relating to the digital audio signal is recorded.
2) A decoding device for decoding an audio signal recorded on an audio disk according to claim 1,
The number of quantization bits and the sampling frequency of each of the first and second channel groups of the digital audio signal recorded in the reproduction control information, and a common bit shift for the channels of the second channel group A first channel group and a second channel recorded in the audio object based on the amount and channel assignment information identifying channels of the assigned first and second channel groups, respectively. An audio signal decoding device comprising means for decoding a digital audio signal of a channel of a group.

As described above, according to the present invention, instead of a DVD-Video title set and a management area including information for managing the DVD-Video title set, a DVD audio title including audio data without including a playback control pack is provided. A set and a management area including information for managing the DVD audio title set are provided, so that when the audio signal is mainly recorded, it can be easily reproduced for the user, which is convenient and the real-time management can be performed. Can be easy. According to the present invention, the multi-channel audio data is divided into two groups, the sampling frequency is assigned, and the bit-shift encoding is performed to improve the S / N ratio and reduce the number of bits. This is effective for setting the recording time of the audio signal as desired while securing the recording capacity.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 is an explanatory diagram of a DVD-video format and a DVD-audio format as a reference example, FIG. 2 is an explanatory diagram showing the format of an audio manager (AMG) of FIG. 1 in detail, and FIG. 3 is an audio title of FIG. FIG. 4 is an explanatory diagram showing the format of the set (ATS) in detail, FIG. 4 is an explanatory diagram showing the format of the audio manager information (AMGI) of FIG. 2 in detail, and FIG. 5 is a diagram of the audio title set attribute table (ATS-ATRT) of FIG. 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 detailed diagram of the format of the audio title set information (ATSI) of FIG. Theory FIG. 8 is an explanatory diagram showing the format of the audio title set information management table (ATSI-MAT) of FIG. 7 in detail. FIG. 9 is an audio title set menu audio stream attribute data (ATSM-AST-ATR) of 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 (ATS) of each audio stream of FIG. FIG. 3 is an explanatory diagram showing (AST-ATR) in detail.

FIG. 12 is an explanatory diagram showing the audio content block unit (ACBU) of FIG. 1, FIG. 13 is an explanatory diagram showing the format of the audio pack and video pack of FIG. 12 in detail, and FIG. FIG. 15 is an explanatory diagram showing the format of the audio character display (ACD) area in FIG. 14 in detail, and FIG. 16 is an explanatory diagram showing an example displayed by the namespace information in FIG. FIG. 17 is an explanatory diagram showing the format of the audio search data (ASD) area of FIG. 14 in detail, and 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 as a reference example, FIG. 20 is a block diagram functionally showing the reproducing apparatus of FIG. 19, and FIG. 21 is an audio manager information ( FIG. 22 is an explanatory diagram showing the format of the TOC information in FIG. 21 in detail, FIG. 23 is an explanatory diagram showing the format of the audio title set information (ATSI) in the second reference example in detail, and FIG. FIG. 25 is a block diagram showing a DVD-Audio disc reproducing apparatus according to the second embodiment, FIG. 25 is a block diagram functionally showing the reproducing apparatus shown in FIG. 24, and FIG. 26 shows TOC information and the reproducing apparatus according to the third embodiment. 27 and 28 are flowcharts for explaining the AV synchronous reproduction processing. A.

Here, the DVD-audio disc described in this description has a stereo 2-channel and a 5/6 / 8-channel multi-channel as an audio signal so as to correspond to a transition period when shifting from the CD generation to the DVD-audio generation. Are recorded. When the transition period has elapsed, it is considered that only the multi-channel signal of 5/6/8 channel is recorded.

FIGS. 1 (a) and 1 (b) show DVD-Video and DVD-Audio formats, respectively. The DVD-Audio format is compatible with DVD-Video although the area name is different. First, the DVD-video format is roughly composed of a video manager (VMG) at the head and each area of a plurality of video title sets (VTS) following the format. On the other hand, the DVD-audio format corresponds to the figure. 2 and an audio title set (ATS) following the AMG, as shown in detail in FIG.

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 (ACBS) and the last ATSI. In ATSI, the playing time of each song in the ACBS is set 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 composed of a plurality of VCBs, while each of the ACBSs is composed of a plurality of ACBs. Each of the VCBs corresponds to one title of the video, and each of the ACBs corresponds to one title of the audio. 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). A chapter contains a part of title (PTT) and a track contains a part of title (PTT).

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

Each of the VCB units includes 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 them is constituted by a head audio control pack (hereinafter, A-CONT pack) corresponding thereto, followed by a plurality of A packs and V packs.

The information for controlling the succeeding V pack is arranged in the $ CONT pack, and the information for managing the audio signal of the succeeding A pack, such as the TOC information of the CD, is arranged in the A-CONT pack. Audio data is arranged in the A pack, and closed caption (CC) data other than audio data, for example, is arranged in the V pack in addition to video data.

AMG (Audio Manager), as shown in FIG.
Audio manager information (AMGI) detailed in FIG. 4; audio content block set for the AMG menu (AMGM-ACBS);
・ AMGI for backup
Having. AMGM-ACBS includes presentation control information (PCI) as control information,
・ Data search information (DSI)
Having.

ATS (Audio Title Set) is as shown in FIG.
Audio title set information (ATSI) shown in detail in FIG.
An audio content block set (ATSM-ACBS) for the ATS menu;
An audio content block set (ATSA-ACBS) for ATS titles;
・ ATSI for backup
Having. Both ATSM-ACBS and ATSA-ACBS have the PCI and DSI described above (FIG. 2).

AMGI (Audio Manager Information), as shown in detail in FIG.
・ AMGI management table (AMGI-MAT)
A title search pointer table (T-SRPT);
An audio manager menu PGCI unit table (AMGM-PGCI-UT);
-Parental management information table (PTL-MAIT)
An audio title set attribute table (ATS-ATRT);
A text data manager (TXTDT-MG);
An audio manager menu cell (index) address table (AMGM-C-ADT);
・ Audio manager menu ・ Audio content block unit ・ Addressless map (AMGM-ACBU-ADMAP)
Having.

The ATS-ATRT (audio title set attribute table), as shown in detail in FIG.
Audio title set attribute table information (ATS-ATRTI);
An audio title set attribute search pointer (ATS-ATR-SRP # 1 to #n) of each of a plurality (n) of ATSs;
Audio title set attribute data (ATS-ATR- # 1 to #n) for each of a plurality (n) of ATSs as shown in detail in FIG.
Having.

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);
-ATS-CAT (category),
・ ATS-ATRI (information)
Having.

The ATSI (ATS information) shown in FIG. 3 is, as shown in detail in FIG.
An audio title set information management table (ATSI-MAT) shown in detail in FIG.
An audio title set, a part of title, a 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,
An address map (ATSM-ACBU-ADMAP);
An audio title set cell address table (ATS-C-ADT);
-Audio title set-Audio content block unit-Address map (ATS-ACBU-ADMAP)
Having.

The ATSI-MAT (Audio Title Set Information Management Table) shown in FIG.
ATS-ID (identifier);
ATS-EA (end address),
・ 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-AST-ATR (ATSM audio stream attributes) as detailed in FIG.
ATS-AST-Ns (the number of ATS audio streams);
ATS-AST-ATRT (ATS audio stream attribute table) as shown in detail in FIG.
Having.

The ATSM-AST-ATR is composed of 8 bytes (bits b63 to b0) as shown in detail in FIG. ) Is placed (other bits are reserved).
(1) Audio encoding mode (3 bits b63 to b61)
000b: Dolby AC-3
010b: MPEG-1 or MPEG-2 (no extended bit stream)
011b: MPEG-2 (with extended bit stream)
100b: Linear PCM audio 101b: Linear PCM audio (including 2ch + 5ch, 2ch + 6ch, 2ch + 8ch)
(2) Quantization / DRC (Dynamic Range Control) information (2 bits b55, b54)
"11b" when the audio encoding mode is "000b"
When the audio encoding mode is “010b” or “011b”,
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: Reservation. Stereo when the audio encoding mode is “100b” or “101b”. For 2ch 00b: 16 bits 01b: 20 bits 10b: 24 bits 11b: Reserved (3) Sampling frequency fs (2 bits b53, b52)
00b: 48kHz for stereo 2ch
01b: 96 kHz
10b: 192 kHz
(4) Number of audio channels (3 bits b50 to b48)
000b: 1ch (monaural)
001b: 2ch (stereo)
010b: 3ch
011b: 4ch
100b: (stereo 2ch + 5ch)
101b: (stereo 2ch + 6ch)
110b: 7ch
111b: (stereo 2ch + 8ch)
As shown in detail in FIG. 11, the ATS-AST-ATRT (ATS audio stream attribute table) shown in FIG. 10 has ATS-AST-ATR for each of audio streams # 0 to # 7, and ATS-AST-ATR. Are composed of 8 bytes (total of 64 bytes).

As shown in FIG. 11, the ATS-AST-ATR of one audio stream is 8 bytes (bits b63 to b0) similar to the audio title set menu audio stream attribute data (ATSM-AST-ATR) shown in FIG. And in addition to the attribute data (1) to (4),
(5) Multi-channel extension (1 bit b60)
(6) audio type (2-bit b59, b58);
(7) Audio application mode (2-bit b57, b56)
(8) Thinning information of the stream (AST) (2 bits b47, b46) and (9) Thinning information of only 1 channel of LFE (Low Frequency Effect) (2 bits b45, b44)
Of each data. And, in (7) audio application mode of this DVD audio disc,
11b: 2ch + surround mode is recorded, 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: Quota (1/4)
Is recorded.

However, (4) the number of audio channels in the ATSM-AST-ATR is always 2ch in 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 channels, a stereo signal of 2 channels is allocated to the audio stream # 0, and a front signal of 3 channels is allocated to the audio stream # 1 of the 6 channels, and a rear signal of 2 channels and a LFE channel Assign the signal to audio stream # 2. 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 with the following quantization bit number and recorded,
Stereo 2ch: 48kHz, 20bit Front 3ch: 96kHz, 16bit Rear 2ch, LFE1ch: 48kHz, 16bit (no thinning)
The audio title set menu / audio stream / attribute data (ATSM-AST-ATR) shown in FIG. 9 has an attribute of stereo 2ch (1) audio encoding mode 101b: linear PCM audio (including 2ch + 5ch, 2ch + 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-AST-ATR of the audio stream # 0 includes (1) audio encoding mode 101b: linear PCM audio (including 2ch + 5ch, 2ch + 6ch, and 2ch + 8ch).
(2) Quantization / DRC
01b: 20 bits (3) sampling frequency fs
00b: 48 kHz
(4) Number of audio channels 001b: 2ch (stereo)
(7) Audio application mode 11b: 2ch + surround mode (8) Thinning information of the stream 00b: Full (1/1)
(9) Thinning-out information only for LFE1ch 00b: Full (1/1)
Is recorded.

The ATS-AST-ATR of the audio stream # 1 includes (1) audio encoding mode 101b: linear PCM audio (including 2ch + 5ch, 2ch + 6ch, and 2ch + 8ch).
(2) Quantization / DRC
00b: 16 bits (3) sampling frequency fs
01b: 96 kHz
(4) Number of audio channels 010b: 3ch
(7) Audio application mode 11b: 2ch + surround mode (8) Thinning information of the stream 00b: Full (1/1)
(9) Thinning-out information only for LFE1ch 00b: Full (1/1)
Is recorded.

The ATS-AST-ATR of the audio stream # 2 includes (1) audio encoding mode 101b: linear PCM audio (including 2ch + 5ch, 2ch + 6ch, and 2ch + 8ch).
(2) Quantization / DRC
00b: 16 bits (3) sampling frequency fs
00b: 48 kHz
(4) Number of audio channels 010b: 3ch
(7) Audio application mode 11b: 2ch + surround mode (8) Thinning information of the stream 00b: Full (1/1)
(9) Thinning-out information only for LFE1ch 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 constituted by an arbitrary number of packs for 0.4 to 1.0 seconds, and the ACB unit is constituted by an arbitrary number of packs for 0.5 to 1.0 seconds. I have. 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. The audio time (GOF: Group of Audio Frame unit) is indicated by the A-CONT pack, and its data position is determined by the audio frame number, the number of the first access unit pointer, and the number of frame headers. The A-pack immediately before the A-CONT pack does not force padding in units of 0.5 seconds of the 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 adjacently, and a multi-channel of 5/6/8 channel is used. In such a case, they are similarly arranged adjacently. The V pack is arranged adjacent to the A pack when displaying an image during reproduction of an audio signal. As shown in FIG. 13, the A-pack and the V-pack have a 4-byte pack start information for a 2034-byte user data (A data and V data) and a 6-byte SCR (System Clock Reference). ) Information, 3-byte Mux rate (rate) information, and 1-byte stuffing, and a total of 14-byte pack header is added (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, as shown in FIG. 14, the A-CONT pack has a 14-byte pack header, a 24-byte system header, a 1003 byte ACD (Audio Character Display) packet, and a 1007 byte ASD (Audio Search Data). ) It is composed of packets. The ACD packet includes a 6-byte packet header, a 1-byte substream ID, 636-byte ACD (audio character display) information as shown in detail in FIG. 15, and a 360-byte reserved area. The ASD packet includes a 6-byte packet header, a 1-byte substream ID, and a 1000-byte ASD (audio search data) as shown in detail in FIG.

The 636-byte ACD information area has 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" as shown in detail in FIG. Each of these areas is composed of a 93-byte name space area, two 93-byte free space areas, and a 15-byte data pointer area. 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 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 includes, for example, 16-byte service level information, 12-byte language code information, 6-byte character set code information, 6-byte display item information, and 2-byte “previous ACD information. Difference information and 6-byte 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). The 12-byte language code information 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 8 languages in one file. English is mandatory.

The $ 6-byte character set code information can have a maximum of 15 character codes corresponding to the language codes, and indicates the presence / absence and type of characters "1" and "2" in 1 byte. A code example is shown below.

1. ISO646
2. ISO8859-1
3. MS-JIS
The 6-byte display item information indicates the free spaces “1” and “2” shown in FIG. 15, the presence / absence of a data pointer, and the ID. 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-byte title. It is composed of set search information, 8-byte title search information, 404-byte track search information, 408-byte index search information, 80-byte highlight search information, and a 52-byte reserved area.

The 8-byte current number information includes the current title number of the title set (2 bytes: BCD), the current track number of the title set (2 bytes: BCD), and the current index number of the track (2 bytes: BCD). ) And a reserved area (2 bytes). The 16-byte current time information includes the playback time of the track (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 composed 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 a first sector number (4 bytes) of the title and a last sector number (4 bytes) of the title. The 404-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), a first index number of the track (4 bytes), and a last index number of the track (4 bytes). The 80-byte highlight search information includes a track in-sector number (4 bytes × 10) and a track out-sector number (4 bytes × 10).

According to such a format, the A-CONT pack for managing the audio signal of the succeeding A pack, such as the TOC information of the CD, is arranged at the head of the plurality of A packs. However, the recording capacity can be increased. The A-CONT pack can manage audio time, and the A-CONT pack can extract simple character information such as a song title related to audio data.

Also, since TOC information such as a title, a start address, and a playing time is arranged in the A-CONT pack, even during audio reproduction, information according to a user operation is taken out from the A-CONT pack and reproduction is started. be able to. Further, 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 user operation is stored in the memory. And can immediately start playback. Also, since there is no need to store a large amount of information such as program chain information (PGCI) in DVD-Video, it is possible to efficiently manage the disk.

further,
1. If there is no image (V) data in the content,
(1) Search and random access to three levels of title, music, and index become possible.
(2) Cueing, time search, and random access in GOF (audio frame) units can be performed.
(3) The time of title, music, and index can be managed in real time.

Also,
2. If there is image (V) data in the content,
For audio data,
In addition to the above (1) to (3),
(4) The title, the current time in the music, and the remaining time can be displayed and managed in real time.

For video data,
(1) Search and random access to the 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.

The ACBU shown in FIG. 1B includes the A-CONT pack and the CONT pack, but may be configured so as not to include the V pack and the CONT pack 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 a reference example 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, and records on the DVD audio disk 1 during reproduction. The read pit data 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 detecting section 3 detects the CONT pack in the reproduced data, sets the control parameters in the parameter section 8, and writes the V pack controlled by the CONT pack into the V pack buffer 4 sequentially. The user data (video signal, sub-picture information) in the V pack written in the V pack buffer 4 is packed by the buffer extracting unit 5 based on the SCR (see FIG. 13) in the V pack and in the CONT pack. Are extracted in the order of output time based on the PTS (Presentation Time Stamp), 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 reproduced data and sets the control parameters in the parameter section 14, and sequentially stores the A-pack controlled by the A-CONT pack in the A-pack buffer 10. Write. The user data (audio signal) in the A-pack written in the A-pack buffer 10 is sorted by the buffer extracting unit 11 in the pack order based on the SCR, and the current time of the audio search data ASD in the A-CONT pack (FIG. 17). ), And then output as an analog audio signal via the PCM converter 12, D / A converter 13, and audio output terminal 16. The display data (the audio character display information ACD shown in FIGS. 15 and 16) in the A-CONT pack is sent to the display signal generator 20 to generate a display signal. Or to the built-in character display unit 21.

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

In FIG. 20, when a command signal for reproducing a target music is transmitted from the operation unit 18 or the remote control device 19, the control unit 23 transmits an address control information signal corresponding to the reproduction command to the reproducing unit 2. To reproduce the target music from the DVD audio disk 1. The reproduction signal processing separation means A separates the reproduction data and sends A-CONT information to the control means 23, sends an audio signal to the audio signal output means (12, 13), and sends character information to the character information output means 20. The reproduction signal processing / separation means V separates the reproduction data and sends the CONT information to the control means 23, and sends the video signal and the sub-picture information to the video signal means and the sub-picture information output means (6, 7), respectively.

Next, a reproducing apparatus according to a second reference example using TOC (Table Of Contents) information will be described. As shown in FIG. 21, a TOC as shown in detail in FIG. 22 is additionally recorded in a free area of AMGI (Audio Manager Information), and the reproducing apparatus accesses the TOC information to find the beginning of the music. Do. FIG. 22 shows, as an example, general TOC information recorded in a lead-in area of a CD, and the same information is recorded three times repeatedly. 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, in the TOC information used in the CD, when point = 00 to 99, the absolute time at which each movement indicated by the numeral starts is represented by minutes (PMIN), seconds (PSEC) and frames (PFRAME). You. When point = A0, PMIN indicates the first movement, and PSEC = PFRAME = 0. When point = A1, PMIN indicates the last movement, and PSEC = PFRAME = 0. When point = A2, the absolute time at which the lead-out area starts is expressed in minutes (PMIN), seconds (PSEC) and frames (PFRAME). Therefore, the TOC information shown in FIG. 22 indicates that six music pieces (or six movements) are recorded on the DVD audio disc 1 (points = 01 to 06). This TOC information may be recorded in an empty area of ATSI (audio title set information) as shown in FIG. 23 instead of AMGI, and may be recorded in the ACD packet of the A-CONT pack shown in FIG. May be recorded in the reserved area (360 bytes).

The TOC information is read at the start of reproduction and stored in the TOC information storage memory 14A shown in FIGS. 24 and 25. When the start reproduction of a song or a movement is designated, the TOC information storage memory 14A is referred to. To access the DVD audio disk 1. This TOC information is also recorded in an AMGI, ATSI or A-CONT pack, and further added to a lead-in area (TOC area 1a in the figure) of the innermost periphery of the DVD audio disc 1 as shown in FIG. The TOC detection means 24 may independently access the TOC area 1a at the start of reproduction and store the TOC area 1a in the TOC information storage memory 14A. The TOC information conforms to the configuration shown in FIG. 22, but includes simple reproduction information such as downmix coefficients, and is sometimes referred to as SAPP (Simple Audio Play Pointer) to distinguish it from the information.

Next, the AV synchronous reproduction process using the TOC information will be described with reference to FIGS. In FIG. 27, when the beginning or reproduction of a song or movement is designated, the TOC information corresponding to the designated position is referred to (step S1), and the cell and index locations are calculated based on the TOC information (step S2). ). Next, the location is searched (step S3), and when it is confirmed, synchronous reproduction of A and V is performed as shown in detail in FIG. 28 (step S4 → S5).

In FIG. 28, the CONT pack is reproduced (step S11), the A-CONT pack is reproduced (step S12), and it is checked whether the time information in the CONT pack and the time information in the A-CONT pack are the same (step S12). S13). If they are not the same time, both the CONT pack and the A-CONT pack are adjusted by ± 1 pack (step S14), and the process returns to step S11 to reproduce the CONT pack and the A-CONT pack. In step S14, one of the CONT pack and the A-CONT pack may be adjusted by ± 1 pack and the pack may be reproduced.

If the time information in the CONT pack and 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). Then, the V pack controlled by the CONT pack is reproduced, and the V 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, the V pack address is incremented by one, and the process returns to step S13. 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 or not the reproduction of the V-pack is completed (step S21). If not, the process proceeds to step S22, and if 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. If it is the last pack, the process returns to step S12 to return to the next step S12. Play the A-CONT pack. In step S23, 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). Returning to step S13, on the other hand, in the case of EOF, the AV synchronous reproduction processing ends. As described above, the audio data A and the video data V stored in the pack are reproduced in a seamlessly synchronized manner based on the time management information in the CONT pack and the A-CONT.

Next, a fourth reference example will be described. FIG. 29 shows the format of a fourth practical example of the DVD audio disk according to the present invention, which does not include the VTS as shown in FIGS. 31 to 33, 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), and ATS <1> and ATS <2> managed by AMGI in the AMG. As shown in FIG. 30, ATS <1> and ATS <2> do not include an A-CONT pack, but are 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 the format of a DVD-Van (video + audio navigation) disc. This format is roughly a DVD-Video data including a video title set (VTS) and an audio navigation (navigation). The data is composed of an ANV title set (ANV-TS). More specifically, 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. And ATS <1> and ATS <2> managed by AMGI in AMG in a pair with VTS <1> and VTS <2>.

Further, 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. This format is roughly based on a video title set (VTS) as DVD-video data and an audio title set (ATS) as DVD-audio data. It is configured. More specifically, the VTS includes a video manager (VMG) shown in FIG. 1A, a video and audio video manager menu (VMGM), and VTS <1> managed by a VMGI in the VMG. .

On the other hand, the ATS forms a pair with the audio manager (AMG) shown in FIG. 1B, the audio manager menu (AMGM) for video and audio, and the audio data in VTS <1> on the VTS side. ATS <1> managed by AMGI and ATS <2> which is not paired with the VTS side and 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 audio-only title audio object attributes (AOTT-AOB-ATR) recorded on the disc as attribute data indicating the contents of audio data of the disc of the fourth reference example. The attribute data is composed of 8 bytes (64 bits b63 to b0), and will be described in detail in order from the MSB side. 4 bit (b63 to b60) audio encoding mode;
1-bit (b59) downmix (DM) mode;
A multi-channel structure of 3 bits (b58 to b56);
A 4-bit (b55 to b52) quantization bit number Q1 of the channel group 1; a 4-bit (b51 to b48) quantization bit number Q2 of the channel group 2; and a 4-bit (b47 to b44) channel. Sampling frequency fs1 of group 1;
A sampling frequency fs2 of channel group 2 of 4 bits (b43 to b40);
A 3-bit (b39 to b37) reserved area;
A 5-bit (b36 to b32) channel assignment;
-Consists of a reserved area of the remaining 32 bits (b31 to b0). The remaining 32 bits (b31 to b0) are used for attribute data of each channel.

The above data is 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: Reserved 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 enabled 1b: Downmix stereo output disabled (3) Multi-channel structure type (b58-b56)
000b: Type 1
Others: reserved (4) Quantization bit number Q of channel group 1 (b55 to b52)
0000b: 16 bits 0001b: 20 bits 0010b: 24 bits Others: reserved (5) Number of quantization bits Q of channel group 2 (b51 to b48)
"0000b" when the quantization bit number Q of the channel group 1 is "0000b"
"0000b" or "0001b" when the quantization bit number Q of the channel group 1 is "0001b"
"0000b", "0001b" or "0010b" when the quantization bit number Q of the channel group 1 is "0010b"
However, 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 the sampling frequency fs1 of the channel group 1 is "0000b"
"0000b" or "0001b" when the sampling frequency fs1 of the channel group 1 is "0001b"
"0000b", "0001b" or "0010b" when the sampling frequency fs1 of the channel group 1 is "0010b"
"1000b" when the sampling frequency fs1 of the channel group 1 is "1000b"
"1000b" or "1001b" when the sampling frequency fs1 of the channel group 1 is "1001b"
When the sampling frequency fs1 of the channel group 1 is “1010b”, “1000b”, “1001b”, or “1010b”
The disk 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;
-8-bit ISRC data;
An 8-bit private header length,
A first access unit pointer of 16 bits;
A 1-bit audio emphasis flag F1,
-It is composed of a 1-bit audio emphasis flag F2 and the like.

The audio emphasis flag F1 describes "Emphasis off" (= 0b) when the sampling frequency fs is 96 kHz or 88.2 kHz, and "Emphasis on" (= 1b) otherwise. Is described. The audio emphasis flag F2 describes "Emphasis off" (= 0b) when the sampling frequency fs is 192 kHz or 176.4 kHz, and "Emphasis on" (= 1b) otherwise. Is described.

Next, the reproduction processing of the reproduction apparatus of the fourth embodiment will be described with reference to FIGS. First, in FIG. 36, it is determined whether the reproduced signal is audio title set (ATS) alone data or has both still image data (step S500). Only the reproduction is performed (step S501), and if both are present, 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 that is a multiple of 48 kHz or a second sampling frequency that is a multiple of 44.1 kHz (step S600). The speed is set to the first frame rate (1/600 second) (step S601), while the frame rate is set to the second frame rate (1 / 551.25 second) for the second sampling frequency. (Step S602). At this time, the determined sampling frequency may be displayed (step S603).

38, first, it is determined whether or not the sampling frequency fs is 192 kHz (step S700). If the sampling frequency fs is 192 kHz, the emphasis circuit is turned off (step S703). If it is not 192 kHz, it is determined whether or not the audio emphasis flag is on (step S701). If it is on, the emphasis circuit is turned on (step S702). If it is not on, step S703. 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 S800). If the sampling frequency fs is 176.4 kHz, the emphasis filter operation is turned off (step S803). If it is not 176.4 kHz, it is determined whether or not the audio emphasis flag is on (step S801). If it is on, the emphasis filter operation is turned on (step S802). Proceeding to step S803, the emphasis circuit is turned off.

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 a reference example, and FIG. 41 is a block diagram showing the signal processing circuit of FIG. 40 in detail.

In FIG. 40, the 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 is converted into, for example, a 24-bit high-resolution PCM signal. Corresponding data strings xb1, x1, xa1, x2, xb2, x3, xa2,
..., xbi, x2i-1, xai, x2i, ...
Is converted to This data sequence (xbi, x2i-1, xai, x2i) is encoded by the signal processing circuit 32 and the memory 33 shown in detail in FIG. 41, and then applied to the DVD audio formatting unit.

The configuration of the signal processing circuit 32 will be described in detail with reference to FIG. First, a band-limited low-resolution curve is converted from a data sequence (xbi, x2i-1, xai, x2i) corresponding to the high-resolution curve α by a low-pass filter 36 that passes a half band, for example, an FIR filter. Data string corresponding to β xc1, *, *, *, xc2, *, *, *, xc3, *, *, *, ..., xci, *, *, *, ...
, Xci,..., Xc1,..., Xc3,.
Generate Here, the data sequence xci is a data sequence in which the sampling frequency is reduced to 1/4 by band-limiting the digital data A / D converted by the A / D converter 31.

.., Xbi, xai,..., Xbi1, xa1, xb2, xa2,..., Xbi, xai,.
Generate

Then, based on these data strings xci, xbi, xai, the adder 39 acting as a difference calculator calculates the difference xbi−xci = Δ1i.
xai−xci = Δ2i
Is calculated. 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 packs 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 converted into a digital signal by an A / D converter 31V, and then this digital video signal is encoded into an MPEG format by a V encoder 32V, and then packed into user data shown in FIG. 34. 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 an embodiment of the present invention 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). ATS consists of ATSI (ATS information) and
It is composed of an audio object set (AOTT-AOBS) for audio only titles shown in detail in FIGS. 43 to 48, and an ATSI for backup.

The ATSI is composed of an ATSI-MAT (ATSI management table) shown in detail in FIGS. 50 to 55 and an ATS-PGCIT (ATS program chain information table) shown in FIGS. 56 to 68 in order from the top. I have.

The AOTT-AOBS is composed of a plurality of audio-only title audio objects (AOTT-AOB) as shown in detail in FIG. 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).

The AOTT-AOB includes two types of AOTT-AOBs, one containing only audio data and the other containing audio data and real time information data (RTI data). Then, one or more types of AOTT-AOB are arranged in one disc or one song.

Each program of the first AOTT-AOB including only audio data is composed of a plurality of audio cells (ATS-C), and these audio cells are composed of only a plurality of audio packs.

Each program of the second AOTT-AOB including audio data and RTI data is composed of a plurality of audio cells (ATS-C), and this audio cell is composed of an RTI pack arranged at a second pack position and another pack. It is composed of audio packs arranged at 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 includes a packet header of 17, 9, or 14 bytes, a private header shown in detail in FIG. 45, and audio data (linear PCM) of 1 to 2011 bytes.

As shown in FIG. 45, the private header includes an 8-bit substream ID,
A 3-bit reserved area;
A 5-bit UPC / EAN-ISRC (Universal Product Code / European Article Number-International Standard Recording Code) number;
-8-bit UPC / EAN-ISRC data;
An 8-bit private header length,
A first access unit pointer of 16 bits;
It is composed of 8 bytes of audio data information (ADI) and 0 to 8 bytes of stuffing bytes.

ADI has a 1-bit audio emphasis flag,
A 1-bit reserved area;
1-bit downmix mode,
1-bit downmix code validity,
・ 4 bit downmix code,
A quantization word length “1” of a 4-bit group “1”;
A quantization word length “2” of a 4-bit group “2”;
An audio sampling frequency fs1 of a 4-bit group "1";
An audio sampling frequency fs2 of a 4-bit group "2";
A 4-bit reserved area;
・ 4-bit multi-channel type,
Bit shift data of the 3-bit channel group “2” (see FIG. 47); and 5-bit channel assignment information (see FIG. 53).
8 bits of dynamic range control information. 8 bits × 2 bits of reserved area.

In the 8-bit (b7 to b0) UPC / EAN-ISRC data area, different data is arranged according to the UPC / EAN-ISRC number as shown in FIG. 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) When UPC / EAN-ISRC number = 4 Upper 2 bits b7, b6: Reserved Lower 6 bits b5 to b0: Copyright holder code (ISRC # 4)
(5) When 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 Year (ISRC # 6)
(7) When UPC / EAN-ISRC number = 7 Upper 4 bits b7 to b4: Reserved Lower 4 bits b3 to b0: Recording Year (ISRC # 7)
In the area of the linear PCM data which is the actual data in the A-pack, the bits of the data of each channel of the group “2” are reduced and arranged in order to improve the S / N ratio and reduce the bits. FIG. 47A shows PCM data of 6 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 bits). And the value of each channel Ch is as follows.

Lmax2> Lmax1 = Lmax3>Lmax4>Lmax5> Lmax6
Then, while the word length of Ch1 to Ch3 of the group "1" is kept as it is and the value of Ch2 is the largest in this example, each level of Ch4 to Ch6 of the group "2" is up-shifted by (0-Lmax2) dB. Then, the LSB side 0 to 4 bits are reduced. In the example shown in FIG. 47, each level of Ch4 to Ch6 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 reproduction control information relating to audio data.

The private header of the RTI packet is
A 1-byte substream ID,
A 2-byte UPC / EAN-ISRC number and data (these are simply referred to as ISRC in the figure);
A 1-byte private header length,
1-byte RTI information ID;
-Consists of 0 to 7 stuffing bytes.

The UPC / EAN-ISRC number and data are the UPC / EAN-ISRC number and data related to the copyright of the still picture contained in the SPCT pack.

As shown in FIG. 49A, the SPS (still picture set) has SP address information (SPAI) and a plurality of SPUs (still picture units) # 1 to #n. It has a plurality of SPs # 1 to #n, and each of the plurality of SPs # 1 to #n has a plurality of SPCT (still picture) packs. As shown in detail in FIG. 49B, the SPCT pack is composed of a 14-byte pack header and an SPCT packet, and the SPCT 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.

The UPC / EAN-ISRC number and data related to the still picture copyright may be included in the packet header of the SPCT pack as described in the RTI pack.

The ATSI-MAT shown in FIG. 42A is composed of 2048 bytes (relative byte positions RBP0 to 2047) as shown in detail in FIG. 50, and an ATS identifier of .12 bytes (RBP0 to 11) in order from the top. (ATS-ID),
ATS end address (ATS-EA) of 4 bytes (RBP12 to 15);
A reserved area of 12 bytes (RBP 16 to 27);
An ATSI end address (ATSI-EA) of 4 bytes (RBP 28 to 31);
A version number (VERN) of 2 bytes (RBP32 to 33);
A reserved area of 94 bytes (RBP34 to 127);
An ATSI-MAT end address of 4 bytes (RBP128 to 131), a reserved area of 60 bytes (RBP132 to 191),
A 4-byte (RBP 192 to 195) AOTT VTS start address;
4 bytes (RBP196 to 199) of the start address of AOBS for AOTT or the start address of VOBS for AOTT;
A 4-byte (RBP 200 to 203) reserved area;
A 4-byte (RBP 204 to 207) ATS-PGCIT start address;
A reserved area of 48 bytes (RBP 208 to 255);
128 bytes (16 × 8) bytes (RBP 256 to 383) of AOB attributes for AOTT (AOTT-AOB-ATR) or attributes of AOTT VOB audio stream (AOTT-VOB-AST-ATR);
A coefficient (ATS-DM-COEFT # 0 to # 15) of 288 (18 × 8) bytes (RBP384 to 661) for downmixing multi-channel audio data into two channels;
A reserved area of 32 bytes (RBP672 to 703);
2 bytes (RBP 704 to 705) of still picture data attribute (ATS-SPCT-ATR) in AOBS for AOTT;
It is composed of a 1342 byte (RBP 706-2047) reserved area.

In the area of 128 (16 × 8) bytes (RBP 256 to 383), when the ATS has AOBS for AOTT, AOTT-AOB-ATR shown in detail in FIG. 51 is described. The AOTT-AOB-ATR (b127 to b0) has an audio coding mode of 8 bits (b127 to b120) in order from the MSB side,
An 8-bit (b119 to b112) reserved area;
A 4-bit (b111 to b108) channel group “1” quantization bit number Q1;
A 4-bit (b107 to b104) quantization bit number Q2 of the channel group “2”;
A sampling frequency fs1 of a 4-bit (b103 to b100) channel group "1";
A sampling frequency fs2 of a 4-bit (b99 to b96) channel group “2”;
A 3-bit (b95 to b93) multi-channel structure type;
Channel assignment of 5 bits (b92 to b88);
-Consists of a reserved area of 8 bits x 11 (b87 to b0).

On the other hand, when the ATS does not have an AOBS for AOTT, AOTT-VOB-AST-ATR shown in FIG. 52 is described. The AOTT-VOB-AST-ATR (b127 to b0) includes an audio coding mode of 8 bits (b127 to b120) in order from the MSB side,
An 8-bit (b119 to b112) reserved area;
A quantization bit number Q of 4 bits (b111 to b108);
A 4-bit (b107 to b104) reserved area;
A sampling frequency fs of 4 bits (b103 to b100);
A 4-bit (b99 to b96) reserved area;
A 3-bit (b95 to b93) multi-channel structure type;
Channel assignment of 5 bits (b92 to b88);
A 3-bit (b87-b85) decoding audio stream number;
A 5-bit (b84 to b80) reserved area;
A 2-bit (b79, b78) MPEG audio DRC;
A 2-bit (b77, b76) reserved area;
The number of 4-bit (b75 to b72) compressed audio channels;
-Consists of a reserved area of 8 bits x 9 (b71 to b0).

The above data is shown in detail below. However, the number of quantization bits, the sampling frequency, and the multi-channel type are the same as those in FIG.
(1) Audio encoding mode (b127 to b120)
00000000b: Linear PCM mode 00000001b: Reserved for compressed audio (Dolby Digital) 00000010b: Reserved for compressed audio (without MPEG2 extension) 00000011b: Reserved for compressed audio (with MPEG2 extension) 00000100b: Reserved for compressed audio (DTS) 00000101b: Reserved for compressed audio (SDDS) Others: Reserved for other encoding modes (8) Channel allocation (b92 to b88)
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, b78)
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 (b75 to b72)
If 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
Others: Reserved In the 288 (18 × 16) byte area (RBP 384 to 671) shown in FIG. 50, table numbers “0” to “8” are used to downmix multi-channel audio data into two channels as shown in FIG. Each downmix coefficient of “15” (ATS-DM-COEFT # 0 to # 15) is described by 18 bytes.

The two-byte (RBP 704, 705) area shown in FIG. 50 is used to describe the still picture data attribute (ATS-SPCT-ATR) in the AOBS for AOTT. A 2-bit (b15, b14) video compression mode;
A 2-bit (b13, b12) TV system;
An aspect ratio of 2 bits (b11, b10);
A display mode of 2 bits (b9, b8);
A 2-bit (b7, b6) reserved area;
A 3-bit (b5 to b3) source picture resolution;
-It is composed of a 3-bit (b2 to b0) reserved area.

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
Others: reserved (3) Aspect ratio (b11, b10)
00b: 4: 3
11b: 16: 9
Others: Hold (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)
000b: 720 × 480 (525/60 system)
720 × 576 (625/60 system)
Others: Reserved The ATS-PGCIT (ATS program chain information table) shown in FIG. 42 (A) is an audio title set PGCI table information shown in detail from FIG. (ATS-PGCITI),
-N audio title set PGCI search pointers (ATS-PGCI-SRP # 1 to #n) shown in detail in Figs. 58 and 59;
-It is composed of 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, and the number of ATS-PGCI-SRP # 1 to #n of 2 bytes in order from the top,
A 2-byte reserved area,
-Consists of a 4-byte ATS-PGCIT end address. Each of the ATS-PGCI-SRPs # 1 to #n is composed of 8 bytes as shown in detail in FIG. 58, and sequentially from the beginning. As shown in FIG. 59, a 4-byte ATS-PGC category (ATS-PGC) is used. -CAT);
-Consists of a 4-byte ATS-PGCI end address.

As shown in detail in FIG. 59, the 4-byte (b31-b0) ATS-PGC category includes, in order from the top, a 1-bit (b31) entry type,
The number of ATS audio titles (ATS-TTN) of 7 bits (b30 to b24);
A 2-bit (b23, b22) block mode;
A 2-bit (b21, b20) block type;
The number of 4-bit (b19 to b16) audio channels;
An 8-bit (b15 to b8) audio encoding mode;
-Consists of an 8-bit (b7 to b0) reserved area.

The contents of the category (ATS-PGC-CAT) will be described in detail below.
(1) Entry type (b31)
0b: Not entry PGC 1b: Entry PGC
(2) Number of ATS audio titles (b30 to b24)
The number of audio titles of this ATS is described in the range of “1” to “99”.
(3) Block mode (b23, b22)
00b: Not ATS-PGC of ATS-PGC block 01b: First ATS-PGC of ATS-PGC block
10b: Reserved 11b: Last ATS-PGC of ATS-PGC block
(4) Block type (b21, b20)
00b: Not a part of this block 01b: Difference block only in audio coding mode 10b: Difference block only in audio channel 11b: Block difference in both audio coding mode and audio channel (5) Number of audio channels (b19 to b19) b16)
0000b: 2 channels or less 0001b: Over 2 channels Each of the audio title sets PGCI (ATS-PGCI) shown in FIG. 56 is sequentially described from the top as shown in FIG. 60 in detail, and the ATS shown in FIGS. 61 and 62 in detail. -PGC General Information (ATS-PGC-GI),
An ATS program information table (ATS-PGIT) shown in detail in FIGS.
-It is composed of an ATS cell playback information table (ATS-C-PBIT) shown in detail in Figs.

The ATS-PGC-GI is composed of 16 bytes (RBP0 to 15) as shown in detail in FIG. 61, and the ATS-PGC content (ATS-PGC-) of 4 bytes (RBP0 to 3) shown in FIG. CNT),
ATS-PGC playback time (ATS-PGC-PB-TM) of 4 bytes (RBP4 to 7);
A 2-byte (RBP8, 9) reserved area;
A 2-byte (RBP10, 11) ATS-PGIT start address;
A 2-byte (RBP12, 13) ATS-C-PBIT start address;
-Consists of a 2-byte (RBP14, 15) reserved area.

As shown in detail in FIG. 62, the 4-byte (b31 to b0) ATS-PGC content has a 17-bit (b31 to b15) reserved area in order from the top,
The number of 7-bit (b14 to b8) programs;
-It is constituted by the number of cells of 8 bits (b7 to b0). The number of programs is in the range of “1” to “99”, and the number of cells is in the range of “1” to “255”.

The ATS program information table (ATS-PGIT) shown in FIG. 60 includes n pieces of ATS program information (ATS-PGI) # 1 to #n as shown in detail in FIG. Each of the ATS-PGIs # 1 to #n is composed of 20 bytes (RBP0 to RBP19) as shown in detail in FIG. 64, and sequentially from the beginning. ATS-PG contents of 4 bytes (RBP0 to RBP3) shown in detail in FIG. (ATS-PG-CNT),
1-byte (RBP4) ATS-PG entry cell number;
A 1-byte (RBP5) reserved area;
The start presentation time (FAC-S-PTM) of the first audio cell of the ATS-PG of 4 bytes (RBP 6 to 9);
An ATS-PG playback time of 4 bytes (RBP10 to 13);
ATS-PG pause time of 4 bytes (RBP14-17),
A 1-byte (RBP18) reserved area (for copyright management data CMI);
-Consists of a 1-byte (RBP19) reserved area.

As shown in detail in FIG. 65, the 2-byte (b31 to 0) ATS-PG contents include, in order from the beginning, a 1-bit (b31) relationship between the previous and current PGs (R / A),
1-bit (b30) STC discontinuity flag (STC-F);
The number of attributes (ATRN) of 3 bits (b29 to b27);
3 bits (b26 to b24) of a channel group (ChGr) “2” bit shift data;
A 2-bit (b23, b22) reserved area;
1-bit (b21) downmix mode (DM);
・ Effectiveness (illustration *) of 1-bit (b20) downmix coefficient,
A 4-bit (b19 to b16) downmix coefficient table number (DM-COEFTN);
-Each bit is composed of RTI flags F15 to F0 each having 1 bit and a total of 16 bits (b15 to b0).

The ATS cell playback information table (ATS-C-PBIT) shown in FIG. 60 is composed of n ATS cell playback information (ATS-C-PBI) # 1- # 1 as shown in detail in FIG. #N. Each of the ATS-C-PBIs # 1 to #n is composed of 12 bytes (RBP0 to 11) as shown in detail in FIG. 67, and an ATS-C index number of 1 byte (RBP0) in order from the top,
-One byte (RBP1) ATS-C type (ATS-C-TY) as shown in detail in FIG.
A 2-byte (RBP2, 3) reserved area;
A 4-byte (RBP4 to 7) ATS-C start address;
-Consists of 4 bytes (RBP8 to 11) of ATS-C end address.

As shown in detail in FIG. 68, the ATS-C type of 1 byte (b7 to b0) includes an ATS cell element (ATS-C-COMP) of 2 bits (b7, b6) in order from the top,
A 2-bit (b5, b4) reserved area;
-It is composed of 4-bit (b3 to b0) ATS cell applications (ATS-C-Usage).

The contents of the above data are shown in detail below.
(1) ATS cell element (b7, b6)
00b: Audio cell consisting only of audio data 01b: Audio cell consisting of audio data and real-time information 10b: Silence cell consisting only of audio data for silence 11b: Picture cell consisting only of still pictures (2) ATS cell use (b3 to b3) b0)
0000b: No description 0001b: Spotlight part Others: Reservation The following describes an encoding device applied to the present invention. 69 and 70 show the configuration and processing of the encoding device, respectively. The 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 is converted into a 24-bit high-resolution PCM signal, for example. 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 applied to the DVD formatting unit. 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 applied to the DVD formatting unit 34. (Steps S5 and S6). In the bit shift / signal processing circuit 32, each channel of the group “2” is bit-shifted.

The video signal V is converted into a digital signal by the A / D converter 31V, and then the digital video signal is encoded into the MPEG format by the V encoder 32V and applied to the DVD formatter 34 (steps S1, S2). . Further, the still image signal SP is converted into a digital signal by the A / D converter 31SP, and then the digital still image signal SP is encoded into the MPEG format by the compression encoder 32SP and applied to the DVD formatter 34 (step S3). , S4). The copyright information and the real-time text information (RTI) are applied to the DVD formatting unit 34 via the 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 (step S7). S9, S10).

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

FIG. 71 shows a specific configuration of the decoding device according to the present invention, and FIG. 72 functionally shows the configuration of FIG. FIG. 73 shows the processing. In FIGS. 71 and 72, first, as in the case shown in FIG. 19, when the operation unit 18 or the remote controller 19 performs the operation of selecting, playing, fast-forwarding, and stopping the music, the control unit 23 performs drive in accordance with the operation. The device 2 and the playback device 17 are controlled. During playback, pit data recorded on the DVD audio disk 1 is read by the drive device 2 and then EFM demodulated.

In the reproducing device 17, this signal is sent to the still image and V pack detecting section 3 and the A and RTI pack detecting section 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 pack and the user data (video signal, still image information) in the V pack written in the 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 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 '.

{Circle around (4)} The A and RTI pack detection unit 9 detects the A and RTI packs in the reproduced data, sets the control parameters in the parameter unit 14, and writes the A and RTI packs in the A and RTI pack buffers 10 sequentially. The user data (audio signal, real-time information) in the A pack and the RTI pack written in the A and RTI pack buffers 10 are extracted by the buffer extracting unit 11 in the order of packs and in the order of output time. The audio signal is output as an analog audio signal via the PCM conversion and bit shift / signal processing unit 12, the D / A conversion unit 13, and the audio output terminal 16. The real-time information is sent to the display signal generation unit 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 unit 21.

The processing of the decoding device will be described with reference to FIG. First, the recording data is read out by accessing the disk 1 (step S20), and 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), and text Information and disc identifier (EX) are separated. Next, each of the separated data is decoded in each of the decoding steps S22 to S30, and is then synchronously reproduced (steps S31 and S32).

Here, there are the following three types of processing for reproducing the still image 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 a still image SP is obtained, a page turning reproduction is performed based on a 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, a time control signal for real-time synchronization is provided by a time control signal under a still picture control information table SPCIT provided in addition to the ATSI shown in FIG. It should be placed in control data information (SPCIT-TCDI).

(4) Still picture page control command information (SPPI) containing a page turning command is placed under SPCIT. As described above, SPCIT is composed of SPCIT general information (SPCIT-GI) of general information, time control data information (SPCIT-TCDI), and still picture page control command information (SPPI). .

In this case, 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 with reference to the SPPI.

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

FIG. 74 shows the reproduction of a signal recorded on a disk 110 such as a DVD audio disk or a DVD video disk on which time information and a page turning command are recorded for synchronizing a still image with audio as shown in FIG. FIG. 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 the demodulation circuit / error correction circuit 113 and then error correction. After that, the stream signal excluding the control data and the DSI data is written to the track buffer 114 by the write control circuit 115, and the control data and the DSI Data is written to the system buffer 117 and the DSI buffer 122, respectively. The data written in the 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 readable / writable general-purpose parameter memory 135 for performing reproduction control. And a system timer 136 are connected.

The stream signal written in the track buffer 114 is read by the read control circuit 116 and then separated by the demultiplexer 128 into a still image pack, an RTI pack, a VBV pack, a sub-picture pack, a VBI pack, and an audio pack. The packs are stored in the still image buffer 147, the RTI buffer 148, the VBV buffer 118, the sub-picture buffer 119, the VBI buffer 120, and the audio buffer 121, respectively. The still image pack and the RTI pack are decoded and output by the still image decoder 149 and the RTI decoder 150, respectively, 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 are decoded by the sub-picture decoder 124 and the VBI decoder 125, respectively, and sent to the adder 127, where the video signals are synthesized. The audio pack is sent to an audio decoder 129, and is converted into an analog signal by a format decomposer 141, a channel separator 142, and D / A converters 144 and 145 therein.

Next, a reproduction process of a still image will be described with reference to FIGS. 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, 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 control data information (SPCIT-TCDI) shown in FIG. That is, synchronous reproduction with the still image data is performed based on the 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 a stop is performed according to the command and the still picture page control command information (SPPI). Playback such as "turn to next" and "return to previous" pages, "deletion", and "enlargement" are performed (step S66). In the processing of a still image of this type “2”, the processing is not synchronized with the audio signal, and the reproduction of the audio signal is not affected.

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. First, an audio pack is decomposed by a format decomposer 141 and then separated by a channel separator 142 into PCM data of each channel. Then, the system controller 132 determines the sampling frequency fs of the audio data decomposed by the format decomposer 141. When 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. , And directly to the D / A converters 144 and 145. On the other hand, in the case of 44.1 kHz of the second system, the 48 kHz of the first system is output by the sample rate converter 143 as shown in FIG. Is sent to the D / A converters 144 and 145 via the switches 146 and 147.

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. On the other hand, in the case of 88.2 kHz of the second system, As shown in FIG. 78A, the sample rate is also up-sampled to 96 kHz of the first system by the sample rate converter 143 and sent to the D / A converters 144 and 145 via the switches 146 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, as shown in FIG. 78B, 48 kHz and 96 kHz of the first system are converted to 44.1 kHz and 88. The frequency may be converted to 2 kHz. Even if the sampling frequency fs of each channel of the multi-channel signal is the first system, for example, as shown in FIG. 78 (C), if a certain channel is 48 kHz, it is up-sampled to 96 kHz, and all the channels are sampled. By performing D / A conversion at 96 kHz, the reproduced sound quality can be improved.

Next, a reproducing apparatus that superimposes and displays copyright information will be described with reference to FIGS. In FIG. 79, the still image pack is sent to the still image decoder 149 via the still image buffer 147 to decode the still image data, and the still image data is applied to the adder 201. The RTI pack is sent to the RTI decoder 150 via the RTI buffer 148 and decoded, and the decoded data is accumulated in the buffer 150 '. At this time, when the RTI pack includes copyright data (UPC / EAN-ISRC data shown in FIGS. 45 and 46), the text character information is converted into character image data by the image conversion unit 200 and applied to the adder 201. Then, the image is combined with a still image and output to the outside, or 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, and Output to the outside.

The operation will be described with reference to FIG. First, when the display instruction of 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 the image data are combined. It is added by the adder 201 and output (steps S71 → S72). On the other hand, if there is no instruction to display the copyright information of the still image, the copyright information decoded from the RTI pack is not added (steps S71 → S73), and then the instruction to display the copyright information of the audio signal is sent to the operation unit. It is determined whether the information has been transmitted from 130 (step S74). Then, when 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 RTI output is performed via the switch 203 (steps S74 → S75). If there is no display instruction, RTI output is not performed. 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 not limited to the method of being incorporated and used as a part of the disc reproducing device shown in FIG. It can be configured as an IC chip as a single unit and used as a component of a DVD video playback device or personal computer.

Next, an embodiment in which the digital audio signal formatted as described above is transmitted through 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 includes a packing processing unit 30, a buffer memory 30B, a control circuit 29, an operation unit 27, and a display 28. 82 to 85, first, when the video signal V, the still picture signal SP, the audio signal A, the real-time information RTI, and the disc identifier (EX) are input, in step S100, as shown in FIG. A pack is generated (Step S101), a video pack is generated (Step S102), a still image pack is generated (Step S103), and then a real-time text is generated (Step S104).

Next, the cell (ATS-C) is managed (step S200), then the PTT (part of title) is managed (step S300), then the title (AOTT-AOB) is managed (step S400), and then the title set (AOTT) -Manage AOBS (step S500) In the following step S600, in order to generate an ATS, a title set is generated as shown in detail in Fig. 84 (step S601), and then a menu is generated (step S602). -Describe the category of PGCI (step S603), and then generate ATS-PGCIT by generating PGIT consisting of PG content including bit shift and generate PGCI (step S604). By generating Generating a TSI (step S605). Then generate AMG (step S700), finally to produce a TOC (step S800).

Next, when transmitting the digital audio signal formatted as described above via a communication line, as shown in FIG. 85, the transmission data stored in the transmission buffer is divided into predetermined lengths and divided into packets. (Step S41), a header including the destination address is added to the head of the packet (Step S42), and this 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, 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), the received data is restored (step S52), and the data is transferred to the memory (step S53).

Next, as shown in FIGS. 88 to 90, first, the AMG is decoded to detect the ATS (step S1100). In the subsequent step S1200, in order to decode the ATSI of the target ATS, as shown in FIG. The ATS-PGCI category is decoded (step S1201), the PGIT composed of PG contents including bit shift is decoded (step S1202), then the attributes and coefficients of the MAT are decoded (step S1203), and these are decoded. Each parameter is set in the parameter memory 56 (step S1204).

Next, when the reproduction is started, the pack is identified (step S1300), and in step S1400, the audio pack is decoded (step S1401) as shown in detail in FIG. 90 to decode the pack, and then the video pack is decoded. (Step S1402), 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 can also be realized by storing the encoding method and the decoding method as a computer program in an IC chip such as a ROM, and operating a CPU (Central Processing Unit) of the computer with 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.

FIG. 3 is an explanatory diagram showing a DVD-video format and a DVD-audio format according to a first reference example. FIG. 2 is an explanatory diagram showing a format of an audio manager (AMG) of FIG. 1 in detail. FIG. 2 is an explanatory diagram showing a format of an audio title set (ATS) of FIG. 1 in detail. FIG. 3 is an explanatory diagram showing the format of audio manager information (AMGI) in FIG. 2 in detail. FIG. 5 is an explanatory diagram showing a format of an audio title set attribute table (ATS-ATRT) in FIG. 4 in detail. FIG. 6 is an explanatory diagram showing the format of the audio title set attribute data (ATS-ATR) in FIG. 5 in detail. FIG. 4 is an explanatory diagram showing the format of the audio title set information (ATSI) of FIG. 3 in detail. FIG. 8 is an explanatory diagram showing the format of the audio title set information management table (ATSI-MAT) of FIG. 7 in detail. FIG. 9 is an explanatory diagram showing the audio title set menu audio stream attribute data (ATSM-AST-ATR) of FIG. 8 in detail. FIG. 9 is an explanatory diagram showing in detail a format of an audio title set audio stream attribute table (ATS-AST-ATRT) of FIG. 8. FIG. 11 is an explanatory diagram showing in detail attribute data (ATS-AST-ATR) of each audio stream in FIG. 10. FIG. 2 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 in FIG. 12 in detail. FIG. 13 is an explanatory diagram showing the format of the audio control (A-CONT) pack of FIG. 12 in detail. FIG. 15 is an explanatory diagram showing a format of an audio character display (ACD) area in FIG. 14 in detail. FIG. 16 is an explanatory diagram illustrating an example displayed by the namespace information of FIG. 15. FIG. 15 is an explanatory diagram showing a format of an audio search data (ASD) area in FIG. 14 in detail. FIG. 9 is an explanatory diagram showing a modification of the audio content block unit in FIG. 1. FIG. 2 is a block diagram showing a DVD-Audio disc reproducing apparatus according to a first reference example. FIG. 20 is a block diagram functionally showing the playback device of FIG. 19. It is an explanatory view showing the format of audio manager information (AMGI) in the second reference example in detail. FIG. 22 is an explanatory diagram showing the TOC information of FIG. 21 in detail. It is an explanatory view showing the format of audio title set information (ATSI) in a modification of the second reference example in detail. FIG. 11 is a block diagram showing a DVD-Audio disc playback device of a second reference example. FIG. 25 is a block diagram functionally showing the playback device of FIG. 24. It is a block diagram showing TOC information and a reproducing device in a third reference example. It is a flowchart for explaining AV synchronous reproduction | regeneration processing. It is a flowchart for explaining AV synchronous reproduction | regeneration processing. FIG. 11 is an explanatory diagram showing a basic format of a DVD-Audio disc of a fourth reference example. FIG. 30 is an explanatory diagram showing an audio data structure of the DVD-audio disc of FIG. 29. It is an explanatory view showing a basic format of a DVD-Van disc. FIG. 3 is an explanatory diagram showing a basic format of a DVD video disk. FIG. 3 is an explanatory diagram showing a basic format of a DVD-Avd disc. It is an explanatory view showing AOTT-AOB-ATR in the DVD-Audio disc of the fourth reference example. FIG. 19 is an explanatory diagram showing a private header of the linear PCM in the DVD-Avd disk of the fourth reference example. 15 is a flowchart illustrating a reproduction process of an ATS and a still image by the reproduction device of the fourth reference example. 15 is a flowchart illustrating a frame reproduction process according to a sampling frequency of audio data by the reproduction device of the fourth reference example. 15 is a flowchart showing audio data emphasis reproduction processing by the reproduction device of the fourth reference example. 15 is a flowchart showing audio data emphasis reproduction processing by the reproduction device of the fourth reference example. It is a block diagram of an encoding device of a reference example. FIG. 41 is a block diagram showing the signal processing circuit of FIG. 40 in detail. FIG. 3 is an explanatory diagram illustrating a data structure of the embodiment according to the present invention. 43 is an explanatory diagram showing the audio object set for audio-only title (AOTT-AOBS) of FIG. 42 in detail. FIG. 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. 45 is an explanatory diagram showing a bit shift of the audio data of FIG. 44. FIG. 44 is an explanatory diagram showing in detail a real-time information (RTI) pack of FIG. 43. FIG. 44 is an explanatory diagram showing a still picture set (SPS) in FIG. 43 in detail. FIG. 43 is an explanatory diagram showing the audio title set information management table (ATSI-MAT) of FIG. 42 in detail. FIG. 51 is an explanatory diagram showing the audio object attribute for audio-only title (AOTT-AOB-ATR) of FIG. 50 in detail. FIG. 51 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. 51 is an explanatory diagram showing the downmix coefficient (ATS-DM-COEFT) of FIG. 50 in detail. FIG. 51 is an explanatory diagram showing the still picture data attribute (ATS-SPCT-ATR) of FIG. 50 in detail. FIG. 43 is an explanatory diagram showing in detail an audio title set program chain information table (ATS-PGCIT) of FIG. 42. FIG. 57 is an explanatory diagram showing the ATS-PGCIT information (ATS-PGCITI) of FIG. 56 in detail; FIG. 57 is an explanatory diagram showing an ATS-PGCI search pointer (ATS-PGCI-SRP) in FIG. 56 in detail. FIG. 59 is an explanatory diagram showing an ATS-PGC category (ATS-PGCI-CAT) in FIG. 58 in detail; FIG. 57 is an explanatory diagram showing the audio title set program chain information (ATS-PGCI) of FIG. 56 in detail. FIG. 61 is an explanatory diagram showing the ATS-PGC general information (ATS-PGC-GI) of FIG. 60 in detail. FIG. 62 is an explanatory diagram showing the ATS-PGC content (ATS-PGC-CNT) of FIG. 61 in detail. FIG. 61 is an explanatory diagram showing an ATS program information table (ATS-PGIT) of FIG. 60 in detail. FIG. 64 is an explanatory diagram showing ATS program information (ATS-PGI) of FIG. 63 in detail. FIG. 65 is an explanatory diagram showing the ATS-PG content (ATS-PG-CNT) of FIG. 64 in detail. FIG. 64 is an explanatory diagram showing an ATS cell playback information table (ATS-C-PBIT) of FIG. 63 in detail; FIG. 67 is an explanatory view showing in detail ATS cell playback information (ATS-C-PBI) of FIG. 66. FIG. 67 is an explanatory diagram showing an ATS-C type (ATS-C-TY) in FIG. 67 in detail; It is a block diagram showing the encoding device of the embodiment applied to the present invention. FIG. 70 is a flowchart showing the processing of the encoding device in FIG. 69. It is a block diagram showing a decoding device of an embodiment concerning the present invention. FIG. 72 is a block diagram functionally showing the decoding device in FIG. 71. FIG. 73 is a flowchart showing the processing of the decoding device in FIGS. 71 and 72. FIG. 3 is a block diagram illustrating a decoding device according to an embodiment of the present invention in detail. FIG. 75 is a flowchart showing audio signal and still image data reproduction processing of the decoding device in FIG. 74. 75 is a flowchart illustrating still image page turning processing of the decoding device in FIG. 74. FIG. 74 is a block diagram showing a modification of the audio decoder in FIG. 74. FIG. 78 is an explanatory diagram showing the processing of the sample rate converter in FIG. 77. FIG. 3 is a block diagram illustrating in detail a copyright data display device of the decoding device according to the embodiment of the present invention. FIG. 80 is a flowchart showing copyright data display processing of the apparatus in FIG. 79. FIG. 2 is a block diagram illustrating a packing device for transmitting an audio signal according to an embodiment of the present invention. 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. 83 is a flowchart showing the ATS generation processing of FIG. 82 in detail. FIG. 83 is a flowchart showing a transmission process of the packing device of FIG. 81. FIG. 2 is a block diagram illustrating an unpacking device for transmitting an audio signal according to an embodiment of the present invention. FIG. 89 is a flowchart showing a receiving process of the unpacking device of FIG. 86. FIG. 89 is a flowchart showing an unpacking process of the unpacking device of FIG. 86. FIG. 85 is a flowchart showing the ATSI decoding process of FIG. 81 in detail. FIG. 89 is a flowchart showing the pack decoding process of FIG. 88 in detail.

Explanation of reference numerals

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 judgment means)
143 Sample rate converter (rate conversion means)
144,145 D / A converter (D / A conversion means)
147 Still image 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 (2)

The recording area has an audio title set (ATS) including a plurality of audio objects (AOB) and a still picture set (SPS),
The digital audio signals recorded in the plurality of audio objects (AOBs) are obtained by assigning analog audio signals to a first multi-channel group and a second multi-channel group, respectively. Each of the second channel groups is generated by being quantized with a different quantization bit number and sampling frequency, and only the channels of the second channel group are bit-shifted in the up direction by a common bit shift amount and the bit shift is performed. Recorded as each digital audio signal with the word length reduced by the amount,
The number of quantization bits and the sampling frequency of each of the first channel group and the second channel group of the digital audio signal recorded in the plurality of audio objects (AOB), and the channel of the second channel group Are recorded in the playback control information (ATSI) of the audio title set (ATS) together with a common bit shift amount for the audio title set (ATS) and channel assignment information for specifying the assigned channels of the first channel group and the second channel group, respectively. An audio disc on which a data structure in which the still picture set (SPS) includes still picture data relating to the digital audio signal is recorded. A decoding device for decoding an audio signal recorded on an audio disk according to claim 1,
The number of quantization bits and the sampling frequency of each of the first and second channel groups of the digital audio signal recorded in the reproduction control information, and a common bit shift for the channels of the second channel group A first channel group and a second channel recorded in the audio object based on the amount and channel assignment information identifying channels of the assigned first and second channel groups, respectively. An audio signal decoding device comprising means for decoding a digital audio signal of a channel of a group.

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