JPH11339390A - Encoding device, decoding device, and copy control method and transmitting method of audio disk and audio data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent troubles for protecting a copy when both of audio data of two channel system and a narrow band system and high quality audio data of a multi-channel system and a wide band system are transmitted. SOLUTION: Audio signals A of two channels or multi-channels relating to the same audio source are selectively inputted to an A/D converter, ADD- converted with different sampling frequencies and the number of bits of quantization, and recorded in a disk. A first CGMCAPS code for controlling copies of two channels and a second CGMCAPS code for controlling copies of multi- channels are recorded in a read-in area of a disk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio disk on which audio data such as a music source is recorded, an audio data encoding device, a decoding device, a copy management method, and a transmission method, and in particular, a disk represented by a DVD audio disk. Concerning the data structure.

[0002]

2. Description of the Related Art Audio optical disks include CDs.
(Compact Disc) has been in the market for over 10 years,
As a recording medium for audio information, it has already remarkably spread beyond conventional cassette tapes. In addition, the physical and logical formats of CDs, which are digital disks, are as follows:
An EFM modulation recording method for 8-bit fixed data length symbols and a data format such as subcode, audio data, and CRC have been established, and a CD player to which various application functions are added has been developed.

An audio signal on a CD has a sampling frequency of 44.1 kHz, a quantization bit number of 16 bits, two channels on the left and right, a reproduction frequency bandwidth of about 22 kHz, and an S / N ratio of about 96 dB. Having. The CD-RO used in the field of electronic publishing
In M, the above characteristics are inferior to CD since audio data is compressed by ADPCM.

On the other hand, for several years, the number of CD channels (2
The idea that the channel-type sound field is unsatisfactory is being established, and in order to solve this problem, excellent sound field characteristics by multi-channels such as six channels are required. With respect to the reproduction characteristics of CDs, the idea that both the reproduction frequency bandwidth and the S / N ratio are unsatisfactory is becoming established, and there is a demand for the standardization of next-generation audio discs having more excellent characteristics. ing.
For example, the reproduction frequency bandwidth is 100 kHz, S / N
A high characteristic of about 144 to 120 dB is required as a ratio. Therefore, the multi-channel or wideband scheme has superior advantages over the CD scheme,
Since it can sufficiently compensate for the dissatisfaction with the characteristics of the above, it is expected to be adopted in audio equipment and spread in the future.

However, conventional audio transmission systems, particularly amplifiers (audio amplifiers) and speakers of a reproducing apparatus, employ a two-channel system and a narrow-band system, and therefore are immediately switched to a multi-channel system or a wide-band system. Never.

[0006] On the other hand, with the full-scale arrival of the multimedia age, DVD standards have been determined, playback systems conforming to the standards have already been sold, and AV (Audio-Visual) software for DVDs has been supplied. D
It is not difficult to imagine that VD will be very widely spread as a high-density recording medium. Therefore, by making the narrow-band and two-channel systems related to the audio transmission system compatible with the DVD audio standard, the spread of the DVD system having a large number of channels, an excellent reproduction frequency bandwidth, and an S / N ratio is also considered. It is thought that it can be realized. Especially D
Compatibility with the audio format in the VD standard is convenient because correlation with the conventional transmission system can be ensured.

[0007]

However, in recent years, there has been an increasing tendency to respect the copyright of digital audio. In the case of transmitting both audio data, the problem of copy protection of high quality audio data arises.

Accordingly, the present invention can solve the problem of copy protection when transmitting both 2-channel or narrowband audio data and multi-channel or wideband audio data of high quality. It is an object of the present invention to provide an audio disk and audio data encoding device, decoding device, copy management method, and transmission method.

[0009]

According to a first aspect of the present invention, in order to achieve the above object, copy management data is recorded on a disk to manage at least a copy of a multi-channel audio source. According to a second aspect of the present invention, in order to achieve the above object, copy management data is recorded on a disk, and at least a copy of an audio source recorded by A / D conversion at a relatively high sampling frequency is managed. Things.

That is, according to the first aspect, a first area in which an audio source is recorded in two channels, a second area in which the audio source is recorded in multiple channels, and at least a second area are recorded in the second area. There is provided an audio disc on which a data structure having a copy management data area for recording copy management data for managing a copy of a recorded audio source is recorded.

According to the second invention, the first area where the audio source is A / D converted at a relatively low sampling frequency and recorded, and the A / D conversion is performed at a relatively high sampling frequency. A data structure having a second area recorded and recorded and a copy management data area in which copy management data for managing at least a copy of an audio source recorded in the second area is recorded. An audio disc is provided.

According to the first and second aspects of the present invention, claim 1 is provided.
Or an audio data encoding device having means for formatting the data structure of the audio disc according to item 2.

According to the first and second aspects of the present invention, claim 1 is provided.
Or an apparatus for decoding a data structure of an audio disc according to 2, wherein the apparatus decodes a data structure transmitted via the audio disc and records the data structure in at least the second area based on the copy management data. There is provided an audio data decoding apparatus having means for managing a copy of an audio source.

According to the first and second aspects of the present invention, claim 1 is provided.
Or a step of formatting the data structure of the audio disc according to 2, a step of transmitting the data structure via a medium, and a step of decoding the data structure transmitted via the medium to generate the copy management data. And managing a copy of the audio source recorded in at least the second area based on the audio data. According to the first and second aspects of the present invention, there is provided an audio data transmission method characterized by transmitting the data structure of the audio disc according to claim 1 through a recording medium or a communication line. .

[0015]

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

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

FIG. 19 is a block diagram showing an audio data encoding apparatus according to the present invention, and FIG. 20 shows two-channel and multi-channel sampling frequencies and the number of quantization bits recorded on an audio disk according to the present invention. FIG. 21 is an explanatory diagram showing copy management data recorded on the audio disc according to the present invention.
Is an explanatory diagram showing the CGMCAPS code of FIG. 21 in detail,
FIG. 23 is a block diagram showing an audio data decoding device, FIG. 24 is a flowchart showing a reproducing process of the reproducing device of FIG. 23, and FIG. 25 is a flowchart showing a copying process according to the present invention.

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

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

Each of the VTSs is composed of the first VTS information (VTSI), followed by one or more video content block sets (VCBS) and the last VTSI, while each of the ATSs corresponds to the first ATS. Information (ATSI) followed by one or more audio content block sets (A
CBS) and the last ATSI. AT
The performance time of each music piece in the ACBS is set in SI in real time.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

ATS-A of one audio stream
As shown in FIG. 11, the ST-ATR includes an audio title set menu, an audio stream,
It is composed of 8 bytes (bits b63 to b0) similar to the attribute data (ATSM-AST-ATR). In addition to the attribute data (1) to (4), (5) Multi-channel extension (ME) ( 1
(Bit b60) and (6) audio type (2 bits b59, b58)
And (7) audio application mode (2-bit b
57, b56), (8) thinning information of the stream (AST) (2 bits b47, b46), and (9) thinning information of only one channel of LFE (Low Frequency Effect) (2 bits b45, b44). Having. 11b: 2ch + surround mode is recorded in (7) audio application mode of this DVD audio disc, and (8) the thinning information of the stream and (9) the thinning information of only LFE1ch are both used in the band. 00b: full (1/1) 01b: half (1/2) 10b: quarter (1/4) is recorded as information.

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

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

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

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

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

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

The A-CONT pack is basically arranged in units of 0.5 second of the audio time, and is arranged so as to be completed within the range of 0.5 to 1.0 second at the break of the index. Also, audio time (GOF: Group of Audio)
Frame) is indicated by an A-CONT pack, and its data position is determined by the number of the audio frame number, the first access unit pointer, and the frame header. The A-pack immediately before the A-CONT pack 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 adjacent to each other. Similarly, in the case of multi-channel, they are arranged adjacently. The V pack is arranged adjacent to the A pack when displaying an image during reproduction of an audio signal. A pack and V pack are shown in FIG.
As shown in FIG. 19, 4-byte pack start information, 6-byte SCR (System Clock Reference) information, and 3-byte Mux rate for 2034 bytes of user data (A data, V data) (Rate) information (stream multiplexing speed information) and a 1-byte stuffing, and a pack header of a total of 14 bytes 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, the A-CONT pack is shown in FIG.
, A 14-byte pack header, a 24-byte system header, a 1003-byte ACD (Audio Character Display) packet,
It is composed of byte ASD (Audio Search Data) packets. The ACD packet has a 6-byte packet header and a 1-byte substream ID.
And a 636-byte ACD as shown in detail in FIG.
(Audio Character Display) Information and 360
It consists of a reserved area of bytes. The ASD packet also has a 6-byte packet header and a 1-byte substream ID, and a 10-byte packet as shown in detail in FIG.
It is composed of 00 bytes of ASD (audio search data).

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

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

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

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

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

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

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

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

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

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

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

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

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

FIG. 19 shows an audio data encoding apparatus according to the present invention. First, a two-channel or multi-channel audio signal A relating to the same audio source is selectively input to the A / D converter 1, and the A / D converter 1 outputs A / D with a sampling frequency and the number of quantization bits (bits) as shown in FIG. D conversion is performed. FIG. 20 shows the transmission rate and the DVD accommodating time in the case of (1) only 2 channels, (2) 2 + 6 channels, and (3) only 6 channels. Naturally, when the sampling frequency and the number of quantization bits are reduced, the storage time increases, and when the sampling frequency and the number of quantization bits are increased, the storage time decreases. However, the storage time for an audio disk for the market is 80 minutes or more. And it is not desirable to record for a very long time.
It is desirable to record at 48 kHz and the number of quantization bits = 20 or 24 bits.

Returning to FIG. 19, the two-channel and multi-channel digital audio signals A are sent to the DVD formatter 6 via the signal processing circuit 2 and the memory 3 and are stored in an audio pack as shown in FIG. Will be accommodated. A / D converter 4 performs A / D conversion of video (V) data of a menu screen or a still image relating to the audio source, and sends the data to DVD formatting section 6 via V encoder 5 to convert the data. 13 is stored in a video pack. The DVD formatter 6 also generates a DVD format as shown in FIGS. The following content encryption unit 7
The format is scrambled by a predetermined CSS (content scrambling system), and the modulation circuit 8 modulates the output signal of the content encryption unit 7 by EFMplus.

The data modulated by the modulation circuit 8 is supplied to a DVD cutting machine (player) (not shown) to manufacture a master (master) of a DVD audio disk. Next, a metal thin film is formed on the master by a sputtering method and a plating method, and is further thickly plated and separated from the master to produce a stamper. Next, a base material of the disc is formed by injection molding by the stamper and bonded to each other to manufacture a DVD audio disc.

A variable length copyright management information (CMI) area of 16 bytes (128 bits) to 188 bytes (1504 bits) is provided in the lead-in portion of the disk. In the CMI area, as shown in FIG. 21, for example, 64-bit disc manufacturing date data, a 52-bit factory code, an 8-bit scrambling synchronization signal, and a 60-bit ISRC code (Intern code)
ational Standard Recording Code) and 8-byte S
ID (source ID) code and a 4-bit first CGMCAPS (Copy Generation Ma
nagement Control Audio Protection System) or SC
MS (Serial Copy Management System) code
4 bit second as well as CGMCAPS)
Is recorded. This data is repeatedly recorded several times, for example, eight times, and the ISRC code and the SID code are scrambled and recorded.

The first and second CGMCAPS codes store the control data area of the lead-in section in RA
It is manufactured and recorded as an M area. And the first
The CGMCAPS code is a copy guard management code for a two-channel data material, and its lower 4
The same data is recorded in the bit. Also, the second CG
The MCAPS code is a copy guard management code of a multi-channel data material (content), and the same data is recorded in the lower 4 bits.

Then, as shown in FIG. 22, of the 4-bit data, 2 or 3 bits are used as actual copy management information, and the remaining 1 or 2 bits are used as blanks. This data is used as reproduction permission / prohibition information for a reproduction-only device (and a recording / reproduction device for reproduction), and is used as copy permission / prohibition information for a recording / reproduction device for copying. The contents of the information shown in FIG. 22 will be described in detail with reference to the flowcharts shown in FIGS.

When a plurality of music pieces are separately managed for copy management in a disc, a CGMCAPS code is provided for each of them. For example, A
The flag information is recorded in the music management area such as MG or ATSI without being repeated. Further, a CGMCAPS code is provided for each of the tracks constituting the music. That is, as shown in FIG. 49, the user data (2034 bytes) in FIG. 13 is composed of a packet header, a substream ID, audio frame information, audio data information (ADI), and audio data. It is recorded as flag information in a management area (ADI) for recording recording conditions. Furthermore, CGMC is included in the TOC information.
An APS code is provided. The first and second CGMs
Instead of repeatedly recording each CAPS code in each 1-byte area, the CAPS code may be composed of 4 bits (actual data is 2 or 3 bits) and recorded in the 1-byte area. Also, instead of providing in the CMI area on the inner circumference of the disk,
An IC having a memory having a GMCAPS code and the like and a CPU is embedded in a disk, and a read-only device or a recording / reproducing device transmits a read control signal to the IC to send a C signal.
A GMCAPS code or the like may be read.

Next, an audio data decoding apparatus according to the present invention will be described with reference to FIG. DV above
The stream signal reproduced from the D audio disk is subjected to EFMplus demodulation by the demodulation circuit 11, then descrambled by the scramble decoding unit 12, and then read-in area data, A-CONT pack, It is separated into packs and V packs. The A-pack is sent to the signal processing circuit 14 and the memory 15 and restored to two-channel or multi-channel audio data. The audio data of each channel is converted into an analog signal by the D / A converter 16 and output. Also, the V pack is a V decoder 17
Is converted to a V signal of a menu screen or a still image and output. Furthermore, lead-in area data and AC
The ONT pack is sent to the control unit 18, and the control unit 18 executes the processing shown in FIGS. 24 and 25 based on the lead-in area data.

FIG. 24 shows a process when only reproduction is performed. In FIG. 24, first, information of the lead-in area is read (step S30), and then it is determined whether the disk is a ROM disk or a RAM disk (steps S31, S32). Then, in the case of a ROM disk, the CGMCAPS code is determined. If (1, 1), reproduction is prohibited (step S3).
(3, S34), When (1, 0), reproduction is prohibited (step S3).
5, (S36), When (1, 0, 1), reproduction is prohibited (step S36).
37, S38), When (0, 0), reproduction is permitted (step S3)
9. If no CGMCAPS code is detected, reproduction is permitted (steps S41 and S42).

In the case of a RAM disk, the CGMCAPS code is also determined.
(3, S44), When (1, 0), reproduction is prohibited (step S4).
5, S46), When (1, 0, 1), the reproduction is permitted (step S46).
47, S48), When (0, 0), reproduction is permitted (step S4).
9. If no CGMCAPS code is detected, reproduction is permitted (steps S51 and S52).

Next, the processing at the time of copying will be described with reference to FIGS. First, R in the lead-in area
The OM / RAM type information and the CGMCAPS code information are read (step S60), and then the CGMCAPS code is determined. If (1, 1), copying is prohibited (step S6).
(1, S62), ・ When (1, 0), CGMCA of the copy source disk
Copying is permitted by rewriting the PS code to (1, 0, 1) (steps S63, S64). When (1, 0, 1), copying is prohibited (steps S65, S66). ), Copying is permitted (step S6).
7, S68), If the CGMCAPS code is not detected, copying is permitted (steps S69, S70). Therefore, C
The disc whose GMCAPS code has been rewritten from (1, 0) to (1, 0, 1) is prohibited from being reproduced as shown in FIGS. A disc with a CGMCAPS code of (1, 1) cannot be played by a commercially available player, and is intended for a specific use that can be played only by a specific player.

Here, in the above embodiment, two-channel and multi-channel audio signals relating to the same audio source are recorded on the disc, so that a user having a two-channel amplifier and a speaker can reproduce two channels. And a user having a multi-channel system can play the multi-channel. However, in the future, the multi-channel scheme will be 2
In view of the fact that it is more widespread than channels, it would be more desirable to record more than two channels of data on a disc at this time.

FIG. 26 shows that, in order to cope with such a market, for example, when a plurality of music pieces are recorded on one disc, one music piece is recorded on 2 + 6 channels, and another music piece is recorded on 6 channels. Only the recording method is shown. Therefore, according to such a recording method, two users having multi-channel amplifiers and speakers are required.
It will be more convenient if there are more users than those who have the channel method. Also, the sampling frequency and the number of quantization bits of a song recorded on only 6 channels are different from those of 6 channels of a song recorded on 2 + 6 channels, as shown in FIG.
For example, recording may be performed with higher quality.

FIG. 27 shows a modification of the copy management data. The area of the disc is generally a PCA (post cutting area) from the inner circumference to the outer circumference,
It consists of a lead-in part, a data part and a lead-out part, and one sector is composed of 2048 bytes. The control area of the lead-in section is composed of 16 sectors “1” to “16”, physical format information is recorded in sector “1”, disc manufacturing information is recorded in sector “2”, and sector “3” is recorded. And "4" in Figure 2
8 is recorded.

The first and second bytes of sectors "3" and "4"
In the byte, the first and second CGMC of 4 bits each
The APS code is recorded. And the first CGMCA
The PS code is a copy guard management code for a two-channel data material, and the second CGMCAPS code is
This is a copy guard management code for a multi-channel data material (content). The 3rd to 19th bytes indicate the ISRC (International Standard Rec Code) indicating the music (program source)
ording Code) SID indicating code and disc maker
(Source ID) Code area. 8 in the third byte
The bit ISRC code and the synchronization signal for scrambling the SID code are recorded, the 60th bit ISRC code is scrambled and recorded from the 4th byte to the 11th byte, and the SI for 8 characters is recorded from the 12th to 19th bytes and thereafter.
The D code is scrambled and recorded.

Similarly, the ISRC code and SID code for one title are recorded in 16 bytes, and a total of 9
Nine titles are recorded. In addition, instead of scrambling both the ISRC code and the SID code,
Only the code may be scrambled. Note that “I” shown as an example of the SID code in FIG.
FPI L231-7 "is based on the" International Federation of Record and Video Producers "
Phonogram Industries, now known as International Federati
on of Phonogram and Video Industries)
231 to 7 "indicate the IFPI mastering code of JVC. The ISRC code is 1
It is composed of two characters, the first to fifth characters are 6 bits, and the sixth to sixth characters
The twelfth character is composed of 4 bits (6 bits are blank).

Here, in the above embodiment, 2 + 6 channels are set to fs = 48 kHz and the number of quantization bits = 20 or 24.
Although it was stated that it is desirable to record in bits,
In the channel, fs = 44.1 kHz and the number of quantization bits = 16 bits of the CD standard are widespread. Therefore, in consideration of the convenience of a user having such a playback device of the CD standard, fs = 44.1 kHz and 88.2 kHz for two channels as shown in FIG.
Recording may be performed with z, the number of quantization bits = 16, 20, or 24 bits. In this case, similarly,
For example, when a plurality of songs are recorded on one disc, a certain song may be recorded on 2 + 6 channels, and another song may be recorded on only 6 channels. Further, as shown in FIG. 30, the sampling frequency and the number of quantization bits of a song recorded on only 6 channels are different from those for 6 channels of a song recorded on 2 + 6 channels, for example, recording is performed with higher quality. It may be.

Next, a second embodiment will be described.
FIG. 31 shows the basic format of a DVD-Van (video + audio navigation) disc as a second embodiment, FIG. 32 shows the ACBU and VCBU of the embodiment of FIG. 31, and FIG. 33 shows the ACD of the second embodiment. 34 shows another example of (audio character display) information. FIG. 34 shows ASD (audio search data) of the second embodiment, FIG. 35 shows the CONT pack of FIG. 31 in detail, and FIG. 36 shows the PCI of FIG. FIG. 37 shows the PCI general information of FIG. 36 in detail, FIG. 38 shows the record information of FIG. 36 in detail, and FIG.
40 shows the DSI general information of FIG. 39 in detail, FIG. 41 shows the seamless reproduction information of FIG. 39 in detail, and FIG. 42 shows the concept of the seamless angle change by the seamless angle information of FIG. FIG. 43 shows an example of the VOBU search information of FIG.
4 shows the VOBU search information of FIG. 39 in detail, and FIG.
Shows the synchronization information in FIG. 39 in detail. FIG.
47 shows the structure of the lead-in area of the discs of the first and second embodiments. FIG. 47 shows the control data block of FIG. 46 in detail, and FIG. 48 shows the physical format information of FIG. 47 in detail.

Here, in the first embodiment, in order for the audio player to control the reproduction of the A-pack, FIG.
The ASD (audio search data) in the A-CONT pack shown in detail in FIG.
Also, when jump playback, title set search,
It is based on search information of title search, track search, index search, and highlight search.

On the other hand, the DVD of the second embodiment
-The basic format of the Van disc is as shown in FIG. 31 so that it can be reproduced using various DVD players.
As shown in (a), the video manager (VMG) and the audio manager (AMG) at the top are roughly divided into a plurality of video title sets (VTS) and audio title sets (ATS). . That is, the basic format of the DVD-Van disc includes both the DVD video disc shown in FIG. 1A and the DVD audio disc shown in FIGS. 1B and 31B. Note that these AM
G and ATS are the AMG shown in FIGS. 1 (b) and 31 (b).
Has the same functions as ATS and ATS, and a description thereof will be omitted.

Each of the VTS and the ATS includes a head VTS information (VTSI) and an ATS information (ATSI), and one or more subsequent video content block sets (VCBS).
And audio content block set (ACBS)
And the last VTSI and ATSI. Each of the VCBSs is composed of a plurality of VCBs, while each of the ACBSs is composed of a plurality of ACBs. Each VCB is for one title of video, and each ACB is correspondingly for one title of audio. Each VCB (one title) is constituted by a plurality of chapters, while each ACB (one title) is correspondingly constituted by a plurality of tracks. 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, while each of the tracks is correspondingly constituted by a plurality of indexes. Each of the cells has multiple V
Each of the indices is correspondingly constituted by a plurality of ACB units (ACBU). Then, the VCB unit (VCBU) includes AC as shown in detail in FIG.
It does not include the ONT pack, and is composed of a leading CONT pack, a relatively large number of A packs, and a relatively small number of V packs. The ACBU is composed of an arbitrary number of packs of 0.4 to 1.0 seconds at substantially the same interval as the VCBU, with the first A pack after the V pack as the head. Here, VCBU is VO in the DVD video standard.
Also called BU.

Since the ACBU does not include the A-CONT pack, the ACD packet and the ASD packet included in the A-CONT pack in the first embodiment are included in the VMG (video manager) shown in FIG. And V
It is arranged in one or both of TS (video title set).

Here, the ACD packet of the first embodiment is provided in an A-CONT pack provided for each ACB unit (every 0.5 to 1.0 second), so that a large number of screens are stored. In the second embodiment, like VMG (video manager) and AMG (audio manager) or VTS (video title set) and ATS (audio title set),
Since both DVD video disk and DVD audio disk data are stored, the amount of data stored is limited.
Therefore, only a relatively small amount of data such as a title name for each song or movement is stored. Also, about one type of audio reproduction control information described in detail below may be stored.

The ACD area in this ACD packet has data of the character "1" of the first language and the character "2" of the second language as in the first embodiment (FIG. 15). Alternatively, the data relating to the character "2" may be omitted as shown in FIG. 33, and a 48-byte general information area and a so-called "audio navigation" such as a music title as shown in FIG. May be constituted by a 294-byte area and a 294-byte audio reproduction control information area relating to the character "1" of one language for displaying "." The area of the character “1” is composed of a 93-byte name space area, two 93-byte free space areas, and a 15-byte data pointer area, as in the first embodiment.

The content of the audio reproduction control information area is arbitrary, and is composed of, for example, 10 types of audio reproduction control information area (250 bytes) of 25 bytes each and a reserve area of 44 bytes. In one type of audio reproduction control information area, 20 bytes of graphic equalizer information, 3 bytes of level balance information and 2 bytes of reverberation additional information are arranged, and this information is selected by the user to control the sound quality of the audio signal. Is done. When the user reproduces the music arranged in the A-pack, the audio reproduction control information is set according to, for example, the genre (classical, jazz, rock, BGM) of the music, or even if the genre is the same. This data is recommended by a so-called professional mixer so that the sound quality at the time of reproduction is optimized according to the performance state, recording state, atmosphere, and the like of the music. When the number of channels of the audio signal is 6, the number of channels is reduced to 2 and the mixing coefficient is stored in the holding area so that stereo reproduction can be performed.

Since the CONT pack is used when the A-pack is seamlessly reproduced, the ASD has the 8-byte current number information and the 16-byte current time in the first embodiment (FIG. 17) as shown in FIG. The information is omitted, and the information is used as a reserved area (76 bytes). For this reason, fine display and reproduction control cannot be performed as in the first embodiment. However, as in the first embodiment, a disk that can be reproduced only by a DVD audio disk-dedicated player and cannot be reproduced by a DVD video disk-dedicated player has become widespread. It is possible to realize an effective audio disc in the transition period up to.

Next, the configuration of the CONT pack will be described in detail with reference to FIG. This CONT pack is DV
In the D video standard, it is called a navigation pack, commonly called a navigation (NV) pack, and includes a 14-byte pack header, a 24-byte system header, and a PCI (presentation control information).
It consists of a packet and a DSI (Data Search Information) packet. The PCI is called playback control information, and this PCI packet is composed of a 6-byte packet header, a 1-byte substream ID, and 979-byte PCI data shown in detail in FIG. 36 (total 986 bytes). The DSI packet is composed of a packet header of 6 bytes, a substream ID of 1 byte, and a DSI of 1017 bytes shown in detail in FIG. 39 (total 1024 bytes).

The PCI data is navigation data for controlling the playback of the VOBU. As shown in detail in FIG. 36, the PCI general information (PCI GI) of 60 bytes and
36-byte non-seamless angle information (NSML
AGLI) and 694-byte highlight information (HL
I) and 189 bytes of recording information (RECI).

As shown in detail in FIG. 37, the PCI general information is as follows: LB of a 4-byte NV pack (= CONT pack)
N "(NV PCK LBN) and 2 bytes of" VOBU category "(VOBU CA
T), 2 bytes of reserved area, 4 bytes of “VOBU user operation control information” (VO
BU UOP CTL) and 4 bytes of “VOBU start PTM” (VOBUS S
PTM) and 4 bytes of “end VOBU PTM” (VOBU E
PTM) and 4 bytes of "end of sequence end in VOBU P
TM ”(VOBU SES PTM), 4 bytes of“ elapsed time in cell ”(CELTM), and 32 bytes of reserved area.

"LBN of NV pack" (NV PCK
LBN) contains the address of the NV pack containing this PCI from the head LB of the VOBS containing this PCI to RLB.
N, and "VOBU category"
(VOBU CAT) describes the state of the analog protection system (APS) of the VOBU.

The non-seamless angle information (NSML AGLI) shown in FIG. 36 is information relating to the destination address when the angle is changed. Effective only when the flag is set to "non-seamless". The highlight information (HLI) shown in FIG. 36 is information for highlighting one rectangular area in the sub-picture display area. ) Can be changed. Also, a sub-picture unit (SP) of each sub-picture stream
The reproduction period of U) is the same as the valid period of the highlight information (HLI).

As shown in detail in FIG. 38, the recording information (RECI) shown in FIG. 36 includes: 10-byte "ISRC of video data in video stream"(ISRCV); and 10-byte "decoding audio". "ISRC of audio data in stream # 0" (ISRC
A0) and 10-byte "ISRC of audio data in decoding audio stream # 1" (ISRC
A1) and 10 bytes of “ISRC of audio data in decoding audio stream # 2” (ISRC
A2) and 10 bytes of “ISRC of audio data in decoding audio stream # 3” (ISRC
A3) and 10 bytes of “ISRC of audio data in decoding audio stream # 4” (ISRC
A4) and 10-byte "ISRC of audio data in decoding audio stream # 5" (ISRC
A5) and 10 bytes of “ISRC of audio data in decoding audio stream # 6” (ISRC
A6) and 10 bytes of “ISRC of audio data in decoding audio stream # 7” (ISRC
A7) and 10-byte "decoding-SP stream #
ISRC of SP data in 0, # 8, # 16 or # 24 "
(ISRC SP0) and 10-byte "decoding SP stream #
ISRC of SP data in # 1, # 9, # 17 or # 25 "
(ISRC SP1) and 10-byte "decoding SP stream #
2, ISR of SP data in # 10, # 18 or # 26
C "(ISRC SP2); 10-byte" decoding SP stream #
3, ISR of SP data in # 11, # 19 or # 27
C "(ISRC SP3) and 10-byte" decoding SP stream #
4, ISR of SP data in # 12, # 20 or # 28
C "(ISRC SP4) and 10-byte" decoding SP stream #
5, ISR of SP data in # 13, # 21 or # 29
C "(ISRC SP5); 10-byte" decoding SP stream #
6, ISR of SP data in # 14, # 22 or # 30
C "(ISRC SP6) and 10-byte" decoding SP stream #
7, ISR of SP data in # 15, # 23 or # 31
C "(ISRC SP7), 1-byte" group of SP streams selected for ISRC "(ISRCSP SEL), and 18-byte reserved area.

The data search information (DS) shown in FIG.
I) is navigation data for searching for data and executing seamless playback of VOBUs.
As shown in detail in (a), 32 bytes of DSI general information (DSI GI); and 148 bytes of seamless reproduction information (SML PB
I) and 54 bytes of seamless angle information (SML A)
GLI) and 168 bytes of VOBU search information (VOBU SR)
I), 144 bytes of synchronization information (SYNCI), and 471 bytes of reserved area.

The DSI general information (DSI GI) is shown in FIG.
As shown in detail in-4 byte "SCR base of NV PCK" (NV
PCK SCR) ・ 4 bytes of “LV PCK LBN” (NV PCK
LBN) and 4 bytes of “VOBU end address” (VOBU)
EA) and 4 bytes of “end address of first reference picture of VOBU” (VOBU 1STREF EA)
4 bytes of “end address of second reference picture of VOBU” (VOBU 2NDREF EA)
4 bytes of “end address of the third reference picture of VOBU” (VOBU 3RDREF EA)
2 bytes of “VOBU ID number of VOBU” (VOB
UVOB IDN), 1-byte reserved area, 1-byte "VOBU cell ID number" (VOBU
C IDN) and 4 bytes of “cell elapsed time” (C ELTM).

The seamless reproduction information (SM) shown in FIG.
LPBI) is as shown in detail in FIG. 41. 2 bytes "category of seamless VOBU" (VO
BU SML CAT) 4 bytes of “end address of interleaved unit” (ILVU EA) 4 bytes of “start address of next interleaved unit” (NXT ILVU SA) 2 bytes "Next interleaved unit size" (NXT ILVUSZ) and 4 bytes "start video PTM in VOB" (VO
BVS PTM) and 4 bytes of “end PTM of video in VOB” (VO
BVE PTM) and 8 bytes x 8 "End PT of audio in VOB"
M ”(VOB A STPPTM), and 8 bytes × 8“ audio gap length in VOB ”(VOB A GAPLEN).

The seamless angle information shown in FIG. 39 is information relating to the destination address when the angle is changed as shown in FIG. 42. When the angle change is performed seamlessly, that is, when the seamless angle change flag is set to “seamless” Valid only when set to "".

The VOBU search information (VOBU search information) shown in FIG.
BU SRI) includes this cell as shown in FIG.
Before and after the reproduction start time of the VOBU including this DSI.
The start address of the VOBU reproduced at 5 × n seconds is described, and is valid only in one cell. As shown in detail in FIG. 44, this information includes: 4 bytes of “the next VOBU start address having video data” (FWDI Video); 4 bytes of “+240 VOBU start address and video presence flag” (FWDI 240); 4 bytes of “+120 VOBU start address and video presence flag” (FWDI 120); 4 bytes of “+60 VOBU start address and video existence flag” (FWDI60); 4 bytes of “+20 VOBU start address and video existence flag” ( FWDI20), 4 bytes of “+15 VOBU start address and video presence flag” (FWDI15), 4 bytes of “+14 VOBU start address and video existence flag” (FWDI14), and 4 bytes of “+13 VOBU start address and video” Existence Lag "(FWDI13); 4 bytes of" +12 VOBU start address and video presence flag "(FWDI12); 4 bytes of" +11 VOBU start address and video presence flag "(FWDI11); 4 bytes of" +10 VOBU start " An address and a video presence flag (FWDI 10); a 4-byte “+9 VOBU start address and video existence flag” (FWDI 9); a 4-byte “+8 VOBU start address and video existence flag” (FWDI 8); 4 bytes of “+7 VOBU start address and video presence flag” (FWDI 7); 4 bytes of “+6 VOBU start address and video existence flag” (FWDI 6); 4 bytes of “+5 VOBU start address and video existence flag” (FWDI 5) ・ 4 bytes "+4 VOBU start address and video presence flag" (FWDI 4), 4 bytes "+3 VOBU start address and video existence flag" (FWDI 3), and 4 bytes "+2 VOBU start address and video existence flag" (FWDI 4). 2); 4 bytes of “+1 VOBU start address and video presence flag” (FWDI 1); 4 bytes of “next VOBU start address and video presence flag” (FWDI Next); 4 bytes of “previous” VOBU start address and video presence flag ”(BWDI Prev), 4 bytes of“ −1 VOBU start address and video existence flag ”(BWDI 1), and 4 bytes of“ −2 VOBU start address and video existence flag ”( BWDI 2), 4 bytes of “−3 VOBU start address and video” A 4-byte "-4 VOBU head address and video presence flag" (BWDI 4); a 4-byte "-5 VOBU head address and video presence flag" (BWDI 5); 4-byte "-6 VOBU start address and video presence flag" (BWDI 6);-4-byte "-7 VOBU start address and video existence flag" (BWDI 7);-4-byte "-8 VOBU start address and video""Presenceflag" (BWDI 8); 4 bytes of "-9 VOBU start address and video presence flag" (BWDI 9); 4 bytes of "-10 VOBU start address and video presence flag" (BWDI 10); 4 bytes: “-11 VOBU start address and video presence flag” (BWDI11) 4 bytes of "-13 VOBU start address and video presence flag" (BWDI 13); 4 bytes of "-14 VOBU start address and video existence flag" (BWDI 12) BWDI14), 4 bytes of "-15 VOBU start address and video presence flag" (BWDI15), 4 bytes of "-20 VOBU start address and video presence flag" (BWDI20), and 4 bytes of "-60 VOBU start An address and a video presence flag (BWDI 60); a 4-byte "-120 VOBU head address and a video presence flag" (BWDI 120); a 4-byte "-240 VOBU head address and a video presence flag" (BWDI 240); 4-byte "video data It is constituted by VOBU start address of before with other "(BWDI Video).

Synchronization information (SYNCI) shown in FIG.
Are address information of audio data and sub-picture data reproduced in synchronization with the video data of the VOBU including this DSI. As shown in detail in FIG.
K) address ”(A SYNCA 0 to 7) and 4 bytes × 32“ sub-picture pack (SP)
VOBU top address for PCK) ”(SP SYNCA
0 to 31).

Next, the disc identifiers of the first and second embodiments will be described. The recording area of the DVD is shown in FIG.
As shown in (1), it is roughly composed of a lead-in area and a data area. In addition, the lead-in area of the DVD is as follows.
h ”before the“ 00h ”block; ・ Sector number“ 02F000h ”to sector number“ 02 ”
F020h ”and two reference code blocks up to and including the sector number“ 02F020h ”and the sector number“ 02 ”.
All 00h for 30 blocks before "F200h"
And from the sector number "02F200h" to the sector number "02
A control data block of 192 blocks before “FE00h”; and a sector number “03” from a sector number “02FE00h”
All 00h for 32 blocks before "0000h"
Block.

Also, from the beginning of the data area (sector number "030000h"), data of ISO9660 and micro UDF (universal disk format) are recorded, and then the audio title set (T
S), a video TS, a computer TS, and the like are recorded.

As shown in FIG. 47, the control data block in the above-described lead-in area is composed of sectors of physical format information, sectors of disk manufacturing information, and sectors of copyright information. As shown in FIG. 48, the physical format information sectors include a book type and a part version area, a disk size and a minimum readout rate area, a disk structure area, a recording density area, and a data density area. It is composed of areas such as area allocation.

The book type and part version areas are assigned as disc identifiers. According to the upper bits, "DVD-ROM disc", "DVD-RAM disc", or "DVD-write once" Once) disc ", and in the case of" DVD-ROM disc ", the lower bits indicate" computer program disc "," pure video disc ", or" video + audio navigation ". disk:
Van disc "or" audio disc "is described.

Therefore, according to the book type and the part version, a disc identifier indicating “DVD-ROM-audio disc” is described in the disc according to the first embodiment, and the disc according to the second embodiment is described in the disc according to the second embodiment. Describes a disc identifier indicating “DVD-ROM-Van disc”. In addition, "DVD-ROM-
Although the “pure video disc” does not have TOC information such as information on the beginning of a song or movement, the “DVD-ROM-audio disc” in the first embodiment and the “DVD-ROM” in the second embodiment are not provided. The TOC information is provided in the lead-in area of the “-Van disc”. This TOC
Information is also called SAPP.

Next, an embodiment for transmitting a digital audio signal formatted as described above via a communication line (network) will be described. FIG. 50 shows an encoding device in which a recording unit 19 and a communication I / F (interface) 20 are added to the configuration shown in FIG.
In FIG. 50, data that has been formatted by the DVD formatting unit 6 and encrypted by the content encryption unit 7 is modulated by a modulation circuit 8 according to a modulation method corresponding to the recording medium, and the recording medium is converted based on the modulated data. It is manufactured, recorded once in the recording unit 19, or transmitted via the communication I / F 20 and a communication line. The data received via the communication line and the communication I / F 20 is supplied to the modulation circuit 8 by being once recorded in the recording unit 19 or the like.

When the digital audio signal formatted as described above is transmitted via a communication line (network), the communication I / F 20 as shown in FIG.
The transmission data stored in the transmission buffer (not shown) is divided into packets of a predetermined length and packetized (step S71), and a header including a destination address is added to the beginning of the packet (step S72). (Step S73).

When the digital audio signal formatted as described above is received via a communication line (network), the header is removed from the packet received from the network as shown in FIG. 52 (step S8).
1) Then, the received data is restored (step S82),
Next, this is transferred to the memory in the recording unit 19 (step S83). This received data can be decoded by the decoding device shown in FIG.

Here, the quantization method of the audio signal is as follows.
1-bit stream data may be used instead of the PCM method. Note that 1-bit stream data is 1-bit ΔΣ
This is a signal represented by a modulation signal, and is also called DSD data. 53A and 53B show examples of quantization and dequantization methods of the PCM method, and FIG. 53C shows a 16-bit Δ
FIG. 53 shows an example of a quantization and inverse quantization method by modulation.
(D) shows an example of a quantization and inverse quantization method using 1-bit ΔΣ modulation modulation.

Note that 1-bit stream data is PCM
Higher efficiency compression is possible. For example, in FIG.
As a quantization example of the CM system, 2 channels: 88.2 kHz / 24 bits (4.234)
6 channels: 44.1 kHz / 16 bits (4.234)
Mbps). Therefore, when quantization is performed by the 1-bit stream method instead of this, 2 channels: 88.2 × 24 kHz / 1 bit (4.2
34 Mbps) 6 channels: 44.1 × 16 kHz / 1 bit (4.2
34 Mbps), for example, if the data is compressed to 1/2, the quantization can be performed with 6 channels: 88.2 × 16 kHz × 1/2/1 bit (4.234 Mbps). Therefore, in this case, the sampling frequency of the multi-channel signal having a large amount of data can be set to be the same as that of the two-channel signal.

[0108]

As described above, according to the first aspect of the present invention, when transmitting both audio data of a two-channel system or a narrow band system and high-quality audio data of a multi-channel system or a wide band system, copy management is performed. Since the data is recorded on the disc and at least the copy of the multi-channel audio source is managed, the problem of the copy protection can be solved. According to the second invention, when transmitting both audio data of the two-channel system or the narrowband system and high-quality audio data of the multichannel system or the wideband system, the copy management data is recorded on the disc, and Since the copy of the audio source recorded by A / D conversion at a relatively high sampling frequency is managed, the problem of copy protection can be solved.

[Brief description of the drawings]

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

FIG. 19 is a block diagram showing an audio data encoding device according to the present invention.

FIG. 20 is an explanatory diagram showing sampling frequencies and quantization bit numbers of two channels and multi channels recorded on an audio disc according to the present invention.

FIG. 21 is an explanatory diagram showing copy management data recorded on an audio disc according to the present invention.

FIG. 22 is an explanatory diagram showing the CGMCAPS code of FIG. 21 in detail.

FIG. 23 is a block diagram showing an audio data decoding device.

24 is a flowchart showing a reproducing process of the reproducing device of FIG. 23.

FIG. 25 is a flowchart showing a copy process according to the present invention.

FIG. 26 is an explanatory diagram showing sampling frequencies and quantization bit numbers of two channels and multi-channels in a modification of the first embodiment.

FIG. 27 is an explanatory diagram showing a lead-in area in a modification of the first embodiment.

28 is an explanatory diagram showing the copyright information area of FIG. 27 in detail.

FIG. 29 is an explanatory diagram showing sampling frequencies and quantization bit numbers of two channels and multi-channels in another modification of the first embodiment.

FIG. 30 shows a second modification of still another modification of the first embodiment.
FIG. 4 is an explanatory diagram showing sampling frequencies and quantization bit numbers of channels and multi-channels.

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

FIG. 32 is an explanatory diagram showing an ACBU and a VCBU of the embodiment in FIG. 31;

FIG. 33 is an explanatory diagram illustrating another example of ACD (audio character display) information according to the second embodiment.

FIG. 34 is an explanatory diagram showing ASD (audio search data) according to the second embodiment.

FIG. 35 is an explanatory view showing the CONT pack of FIG. 31 in detail.

FIG. 36 is an explanatory diagram showing the PCI data of FIG. 34 in detail.

FIG. 37 is an explanatory diagram showing the PCI general information in FIG. 36 in detail.

FIG. 38 is an explanatory diagram showing the record information of FIG. 36 in detail.

FIG. 39 is an explanatory diagram showing the DSI of FIG. 35 in detail;

40 is an explanatory diagram showing the DSI general information of FIG. 39 in detail.

FIG. 41 is an explanatory diagram showing the seamless reproduction information of FIG. 39 in detail;

42 is an explanatory diagram showing the concept of seamless angle change based on the seamless angle information of FIG. 39.

FIG. 43 is an explanatory diagram showing an example of the VOBU search information in FIG. 39;

FIG. 44 is an explanatory diagram showing the VOBU search information of FIG. 39 in detail;

FIG. 45 is an explanatory diagram showing the synchronization information of FIG. 39 in detail;

FIG. 46 is an explanatory diagram showing a configuration of a lead-in area according to the first and second embodiments.

FIG. 47 is an explanatory diagram showing the control data block of FIG. 46 in detail.

FIG. 48 is an explanatory diagram showing the physical format information of FIG. 47 in detail.

FIG. 49 is an explanatory diagram showing a format of an audio pack in an audio disc according to the present invention.

FIG. 50 is a block diagram illustrating an encoding device in an embodiment that transmits an audio signal via a communication line.

FIG. 51 is a flowchart showing a process of transmitting an audio signal via a communication line.

FIG. 52 is a flowchart showing a process of receiving an audio signal via a communication line.

FIG. 53 is a block diagram illustrating a quantization method and an inverse quantization method of the PCM method and the 1-bit stream method.

[Explanation of symbols]

 1, 4 A / D converter 2, 14 signal processing circuit 3, 15 memory 5 V encoder 6 DVD formatting unit (formatting means) 7 content encryption unit 8 modulation circuit 11 demodulation circuit 12 scramble decryption unit 13 DVD de-format Conversion unit 16 D / A converter 17 V decoder 18 control unit (copy management means)

Claims (6)

[Claims] 1. A first area in which an audio source is recorded in two channels, a second area in which the audio source is recorded in multi-channel, and at least an audio source recorded in the second area. An audio disc on which a data structure having a copy management data area for recording copy management data for managing copies is recorded. 2. A first area where an audio source is A / D converted at a relatively low sampling frequency and recorded, and a second area where the audio source is A / D converted and recorded at a relatively high sampling frequency. And a copy management data area in which copy management data for managing a copy of an audio source recorded in at least the second area is recorded. 3. An audio data encoding apparatus comprising means for formatting the data structure of the audio disc according to claim 1 or 2. 4. An apparatus for decoding a data structure of an audio disc according to claim 1, wherein the apparatus decodes a data structure transmitted via the audio disc, and decodes the data structure based on the copy management data. An audio data decoding device, comprising: means for managing a copy of an audio source recorded in the second area. 5. The step of formatting the data structure of the audio disc according to claim 1 or 2, transmitting the data structure via a medium, and decoding the data structure transmitted via the medium. And managing a copy of an audio source recorded in at least the second area based on the copy management data. 6. A method for transmitting audio data, comprising transmitting the data structure of the audio disk according to claim 1 via a recording medium or a communication line.