JP2003331515A - Encoding method and decoding method for audio data - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of copying protection of both of audio data of a two-channel system or narrow-band system and high-quality audio data of a multichannel system or a broad-band system when both of the data are transmitted. <P>SOLUTION: Audio signals A of the two-channels or multichannels relating to the same audio data sources are selectively inputted to an analog-to-digital converter 1, are subjected to analog-to-digital conversion by the different numbers of sampling frequencies and the numbers of quantization bits and are recorded to a disk. A first CGMCAP code for managing the copying of the two-channels and a second CGMCAP code for managing the copying of the multichannels are recorded to a lead-in area of the disk. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of encoding and decoding audio data in which audio data such as a music source is recorded, and more particularly to a data structure of a disc represented by a DVD audio disc.

[0002]

2. Description of the Related Art As an optical disk for audio, a CD
Ten years have passed since (Compact Disc) was put on the market,
As a recording medium for audio information, it has already spread remarkably over conventional cassette tapes. Also, the physical / logical format of a digital disc, CD,
It has been established as an 8-bit fixed data length symbol EFM modulation recording system and a data format such as subcode, audio data, and CRC, and a CD player having various application functions has been developed.

By the way, an audio signal in 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. Have. In addition, CD-RO used in the field of electronic publishing
In M, since the audio data is compressed by ADPCM, the above characteristics are inferior to those in CD.

On the other hand, for several years, the number of CD channels (left and right 2
The idea that the channel type sound field) is unsatisfactory is becoming established, and in order to solve this problem, excellent sound field characteristics by multi-channel such as 6 channels are required. Regarding the reproduction characteristics of CDs, the idea that the reproduction frequency bandwidth and the S / N ratio are both unsatisfactory is being established, and standardization of a next-generation audio disc having more excellent characteristics is desired. ing.
For example, the reproduction frequency bandwidth is 100 kHz, S / N
A high ratio of 144 to 120 dB is required. Therefore, the multi-channel and wide band methods have the advantages over the CD method, and
Since the dissatisfaction with the characteristics of can be sufficiently compensated, it is expected to be adopted and spread in audio equipment in the future.

However, since the conventional audio transmission system, especially the amplifier (audio amplifier) and the speaker of the reproducing apparatus adopt the 2-channel system and the narrow band system, they are immediately switched to the multi-channel system or the wide band system audio equipment. There is no such thing.

On the other hand, with the advent of the multimedia era, the DVD standard has been established, and playback systems based on that standard have already been sold, and AV (Audio-Visual) software for DVD is also supplied. So D
It is not difficult to imagine that VD will be widely spread as a high-density recording medium. Therefore, by making the narrow band and two-channel system related to the audio transmission system compatible with the audio standard of DVD, the DVD system having a large number of channels and excellent reproduction frequency bandwidth and S / N ratio is also spread. It can be realized by Especially D
If it is compatible with the audio format in the VD standard, it is convenient because the correlation with the conventional transmission system can be secured.

[0007]

However, in recent years, there is an increasing tendency to respect the copyright of digital audio, and therefore, the audio data of the two-channel system or the narrow band system and the high quality of the multi-channel system or the wide band system. When transmitting both audio data, a problem of copy protection of high quality audio data occurs.

Therefore, the present invention can solve the problem of copy protection in the case of transmitting both 2-channel audio data and narrow-band audio data and multi-channel audio and high-quality audio data. An object is to provide an audio data encoding method and an audio data decoding method.

[0009]

Means for Solving the Problems The present invention includes the following 1).
And 2). That is, 1) An analog audio signal is sampled at different sampling frequencies for each of the first channel group and the second channel group of the multi-channel, and the number of quantization bits different for each of the first channel group and the second channel group. The audio title is recorded as a digital audio signal quantized by, and is further quantized with a sampling frequency and a quantization bit number that are the same as or different from those of the multi-channel, and is recorded as a 2-channel stereo digital audio signal An audio title set, a quantization control information area in which a sampling frequency and a quantization bit number for each of the first channel group and the second channel group of the digital audio signal recorded in the audio title are recorded, In the title Copy management data area in which copy management data for managing copies of recorded multi-channel and stereo two-channel digital audio signals are separately recorded, and search information for searching a title of the digital audio signals. Of the audio data having a step of formatting a title search information area in which is recorded and an area of the audio manager menu (AMGM) in which the management information of the menu of the digital audio signal is recorded by a predetermined format. Encoding method. 2) An audio signal recorded by the audio data encoding method according to claim 1 is decoded, and a multi-channel and stereo two-channel digital audio signal recorded in the audio title based on the copy management data. Method for decoding audio data, the method including the step of separately managing each copy of the audio data.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION 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 audio manager (AMG) format of FIG. 1 in detail, and FIG. Audio title set (ATS) in Figure 1
4 in detail, FIG. 4 is an explanatory view showing the format of the audio manager information (AMGI) in FIG. 2 in detail, and FIG. 5 is an audio title set attribute table (ATS-) in FIG.
FIG. 6 is an explanatory diagram showing the format of the audio title set attribute data (ATS-ATR) in FIG. 5 in detail, and FIG. 7 is a format of the audio title set information (ATSI) shown in FIG. FIG. 8 is a detailed illustration, and FIG. 8 is an audio title set information management table (ATSI-MA) of FIG.
FIG. 9 is an explanatory view showing the format of T) in detail, and FIG. 9 shows the audio title set menu audio stream attribute data (ATSM-AST-AT) of FIG.
R) in detail, FIG. 10 is an explanatory diagram showing in detail the format of the audio title set / audio stream attribute table (ATS-AST-ATRT) of FIG. 8, and FIG. 11 is attribute data of each audio stream of FIG. (ATS-AST-A
It is an explanatory view showing (TR) in detail.

FIG. 12 is an explanatory diagram showing the audio content block unit (ACBU) of FIG. 1, and FIG.
12 is an explanatory diagram showing in detail the formats of the audio pack and video pack of FIG. 12, 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. ) An explanatory view showing the format of the area in detail, FIG. 16 is an explanatory view showing an example displayed by the namespace information of FIG. 15, and FIG. 17 is an explanatory view showing the format of the audio search data (ASD) area of FIG. 14 in detail. FIG. 18 is an explanatory diagram showing a modified example 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 sampling frequencies of two channels and multi channels and the number of quantization bits recorded on an audio disc according to the present invention. 22 is an explanatory diagram showing copy management data recorded on the audio disc according to the present invention, FIG.
Is an explanatory diagram showing in detail the CGMCAPS code of FIG. 21,
23 is a block diagram showing an audio data decoding device, FIG. 24 is a flowchart showing a reproduction process of the reproducing device of FIG. 23, and FIG. 25 is a flowchart showing a copy process according to the present invention.

Here, in the DVD-audio disc of this description, two channels for stereo and 5/6/8 channels are used as audio signals in order to cope with a transitional period when shifting from the CD generation to the DVD-audio generation. Both multi-channel signals are recorded. Further, it is considered that when this transition period elapses, only the 5/6/8 channel multi-channel signal is recorded.

FIGS. 1 (a) and 1 (b) show DVD-video and DVD-audio formats, respectively.
The VD-audio format is compatible with DVD-video although the area names are different. First, a DVD-video format is roughly divided into a video manager (VMG) at the beginning and each area of a plurality of video title sets (VTS) following the video manager (VMG).
Correspondingly, the audio format is composed of an audio manager (AMG) shown in detail in FIG. 2 and areas of a plurality of audio title sets (ATS) following the AMG as shown in detail in FIG.

Each of the VTSs is composed of the leading 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 leading ATS. Information (ATSI) followed by one or more audio content block sets (A
CBS) and the last ATSI. AT
In SI, the playing time of each song in ACBS is set 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 title of video (Ti
Each of the ACBs corresponds to one title of audio. Each VCB (1 title) is composed of a plurality of chapters, while each ACB (1 title) is composed of a plurality of tracks (Track). Chapters include Part of Title (PTT),
The track contains a Part of Title (PTT).

Each chapter has a plurality of cells (CELL).
On the other hand, each of the tracks is composed of a plurality of indexes corresponding to this. Each cell has multiple VCB units (VCBU)
On the other hand, each of the indexes is correspondingly composed of a plurality of ACB units (ACBU). Each of the VCB unit and ACB unit,
It is composed of a plurality of packs, and one pack is composed of 2048 bytes.

Each of the VCB units is composed of a head control pack (hereinafter referred to as CONT pack), and a plurality of video (V) packs, audio (A) packs and sub-picture (SP) packs following the control pack, while A
Corresponding to this, each of the CB units has a head audio control pack (hereinafter, A-CONT pack).
And a plurality of A packs and V packs following it.

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

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

As shown in FIG. 3, the ATS (audio title set) includes: -audio title set information (ATSI) shown in detail in FIG. 7, -audio content block set (ATSM-ACBS) for ATS menu, -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).

AMGI (Audio Manager Information) is shown in detail in FIG. 4. AMGI management table (AMGI-MA)
T) and-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) in detail in FIG. Text data manager (TXTDT-MG) ・ Audio manager menu cell (index)
Address table (AMGM-C-ADT),-Audio manager menu-Audio content block unit-Addressless map (AMGM-
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); Set attribute search pointer (ATS-ATR-
SRP # 1 to #n), and • audio title set attribute data (ATS-ATR- # 1 to #n) of each of a plurality (n) of ATSs as shown in detail in FIG.

Each of the audio title set attribute data (ATS-ATR- # 1 to #n) is, as shown in detail in FIG. 6, 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 detail in FIG.
T) and-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 is, as shown in detail in FIG. 8, ATS-ID (identifier), ATS-EA (end address), and ATSI- EA ・ VERN (DVD audio spec 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 detailed in FIG. ST-ATR
(ATSM audio stream attributes)
ATS-AST-Ns (the number of ATS audio streams), and ATS-AST-ATRT as shown in detail 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. ~ (4) are arranged (other bits are reserved). (1) Audio coding mode (3 bits b63 to b6
1) 000b: Dolby AC-3 010b: MPEG-1 or MPEG-2 (without extension bitstream) 011b: MPEG-2 (with extension bitstream) 100b: Linear PCM audio 101b: Linear PCM audio (2ch + 5ch, 2ch)
Includes + 6ch and 2ch + 8ch. )

(2) Quantization / DRC (Dynamic Range Control) information (2 bits b55, b54)-"11b" when the audio coding mode is "000b" -The audio coding mode is "010b" or " 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 / audio encoding mode is "100b", "101"
In case of "b", 00b: 16 bits 01b: 20 bits 10b: 24 bits 11b: reserved for stereo 2ch

(3) Sampling frequency fs (2 bits b53, b52) 00b: 48 kHz 01b: 96 kHz 10b: 192 kHz for stereo 2 ch (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.
As shown in detail in FIG. 11, the (ATS audio stream attribute table) has an ATS-AST-ATR for each of the audio streams # 0 to # 7.
Each of TS-AST-ATR is composed of 8 bytes (total of 64 bytes).

ATS-A for one audio stream
The ST-ATR is, as shown in FIG. 11, an audio title set menu, an audio stream, an audio stream set menu shown in FIG.
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-bit b59, b5
8) and (7) audio application mode (2
Bits b57, b56) and (8) the stream (A
ST) thinning information (2 bits b47, b46),
(9) LFE (Low Frequency Effect) It has each data of thinning information (2 bits b45, b44) of only one channel. Then, in the (7) audio application mode of this DVD audio disc, 11b: 2ch +
The surround mode is recorded, and (8) the thinning information of the stream and (9) the thinning information of only LFE1ch are both band information 00b: full (1/1) 01b: half (1/2) 10b. : A quarter (1/4) is recorded.

However, the number of (4) audio channels in this ATSM-AST-ATR is always 2 ch in audio stream # 0, and audio stream # 1 includes front 3 ch. That is, for example, when an audio signal of one title is recorded in 2 + 6ch, a stereo signal of 2ch is output as audio stream # 0.
The front signal of 3ch out of 6ch to audio stream # 1 and the rear signal of 2ch and LFE.
The 1ch 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. 8 are both "3" as the usage data of streams # 0 to # 2. "
Is recorded.

When the analog audio signal of 2 + 6 ch is sampled at the following sampling frequency fs and quantized with the following quantization bit number and recorded, stereo 2 ch: 48 kHz, 20 bit front 3 ch: 96 kHz, 16 bits rear 2ch, LFE 1ch: 48 kHz, 16 bits (no thinning) Audio title set menu audio stream attribute data (ATSM-A
(1) Audio encoding mode 101b: Linear PCM audio (2ch + 5ch, 2ch)
Includes + 6ch and 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.

Also, the ATS of the audio stream # 0
-For AST-ATR, (1) Audio coding mode 101b: Linear PCM audio (2ch + 5ch, 2ch)
Includes + 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) Thinned-out information 00b: Full (1/1) (9) Only thinned-out information 00b: Full (1/1) is recorded on LFE1ch.

The ATS of the audio stream # 1
-For AST-ATR, (1) Audio coding mode 101b: Linear PCM audio (2ch + 5ch, 2ch)
Includes + 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) Stream thinning information 00b : Full (1/1) (9) Only LFE 1ch is thinned out information 00b: Full (1/1) is recorded.

Also, the ATS of audio stream # 2
-For AST-ATR, (1) Audio coding mode 101b: Linear PCM audio (2ch + 5ch, 2ch)
Includes + 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) Stream thinning information 00b : Full (1/1) (9) Thinning information 00b only for LFE1ch: Full (1/1) is recorded.

Next, the A pack in which the audio stream is recorded and its control pack will be described. As shown in FIG. 12, the VCB unit is composed of an arbitrary number of packs for 0.4 to 1.0 seconds, and the ACB unit is 0.5.
It is composed of an arbitrary number of packs for 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 seconds of audio time, and is arranged so as to be completed in the range of 0.5 to 1.0 seconds at the break of the index. In addition, audio time (GOF: Group of Audio
Frame) is indicated by the A-CONT pack, and its data position is determined by the audio frame number, 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 audio time.

Adjacent A packs are arranged so that audio signals are related to each other. For example, in the case of stereo, the L channel pack and the R channel pack are arranged adjacent to each other, and 5/6/8 channel In the case of multi-channel, they are also arranged adjacent to each other. The V pack is arranged adjacent to the A pack when displaying an image during reproduction of an audio signal. Figure 13 shows the A and V packs.
As shown in, the 4-byte pack start information, the 6-byte SCR (System Clock Reference) value, and the 3-byte Mux rate for the 2034-byte user data (A data, V data). (Rate) information (stream multiplexing speed information) and 1-byte stuffing, which is a pack header of 14 bytes in total (1 pack = 2048 bytes in total). In this case, the SCR information, which is a time stamp, is set to "1" in the first pack in the ACB unit and is consecutive in the same title, so that the time of the A pack in the same title can be managed.

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, and a 1007
It is composed of a byte ASD (audio search data) packet. Also, 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 byte reserve area. The ASD packet also has a 6-byte packet header, a 1-byte substream ID, and 10 bytes as shown in detail in FIG.
It is composed of ASD (audio search data) of 00 bytes.

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 an area of 294 bytes for each character "1" of the first language and character "2" of the second language, each area of 93 bytes. The name space area is composed of two free space areas of 93 bytes each and a data pointer area of 15 bytes. In one of the namespace areas of the character "1" of the first language and the character "2" of the second language, for example, as shown in FIG. 16, data for displaying the music title in Japanese is arranged, Data for displaying in English is placed in the other namespace area. The 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 It is composed of reservation information of. The 16-byte service level information indicates the display size, the display type, the audio / video / SP distinction, the stream, etc., the characters are mandatory (required), and the bitmaps are optional (optional). 12
As with the video file, the language code information of the byte indicates the language of the characters “1” and “2” in 2 bytes, and indicates a maximum of 8 languages in one file. English is Mandatory.

The 6-byte character set code information can have up to 15 character codes corresponding to the language code, and the presence or absence of the language of the characters "1" and "2" and the type are indicated by 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 space “1” and “2” shown in FIG. 15, the presence or absence of a data pointer, and the ID. The name space is the mandatory, and the title name, music name, and artist name must be described.

As shown in detail in FIG. 17, 1000-byte ASD (audio search data) includes 16-byte general information, 8-byte current number (No.) information, 16-byte current time information, and 8-byte current time information. Byte title set search information, 8-byte title search information, 404-byte track search information, 408-byte index search information, 80-byte highlight search information, and 52-byte reserved area. There is.

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 of the track (2 bytes: BCD), and the reserved area (2 bytes). The 16-byte current time information is 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 remaining of the title. Of the absolute time (4 bytes: BCD).

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

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

According to such a format, at the beginning of a plurality of A packs, the subsequent A packs such as the TOC information of the CD are recorded.
A-CONT for managing pack audio signals
Since the packs are arranged, the audio data is not integrated with the video data, and the recording capacity can be increased. Further, the A-CONT pack can manage the audio time, and the A-CONT pack can retrieve simple character information such as the song title of the audio data.

In addition, the title in the A-CONT pack,
Since the TOC information such as the start address and the playing time is arranged, the information corresponding to the user's operation can be taken out from the A-CONT pack and the reproduction can be started even during the audio reproduction. 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 reproducing device, and the information according to the user's operation is stored in the memory. Can be immediately read from to start playback. Further, since it is not necessary to store a large amount of information such as program chain information (PGCI) in DVD-video, the disc can be efficiently managed.

Further, 1. When there is no image (V) data in the content, (1) search, random access to three layers of title, song, and index becomes possible. (2) Cue, time search, and random access in GOF (audio frame) units are possible. (3) The time for titles, songs, and indexes can be managed in real time.

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

Regarding video data, (1) search, random access to three layers of title, PTT, and cell become possible. (2) It is possible to perform cueing for each video frame, time search, and random access. (3) The title, PTT, and cell time can be managed in real time. (4) The current time and remaining time in the PTT or title can be displayed and managed in video frame unit time.

The ACBU shown in FIG. 1B is A-CO.
Although the NT pack and the CONT pack are included, the V pack and the CONT pack may not be included as shown in FIG. In this case, the video signal is not recorded, but the recording capacity of the audio signal is increased, so the disk size can be reduced, and the playback function can be simplified. A device 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 related to the same audio source is selectively input to the A / D converter 1, and the sampling frequency and the number of quantization bits (bit) as shown in FIG. D converted. FIG. 20 shows (1) 2 channels only, (2) 2 + 6 channels, (3)
The transmission rate and the accommodation time for the DVD in the case of only 6 channels are shown. Of course, if the sampling frequency and the number of quantization bits are reduced, the accommodation time will be longer, and conversely, if the sampling frequency and the number of quantization bits are increased, the accommodation time will be shorter. However, as an audio disc for the market, the accommodation time is 80 minutes or more. Is desirable, and it is not desirable to record for a long time, so that 2 + 6 channels are fs =
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 formatting section 6 via the signal processing circuit 2 and the memory 3 and stored in the audio pack as shown in FIG. Be accommodated. Also, the menu screen and still image video (V) data relating to this audio source are A / D converted by the A / D converter 4, and this data is sent to the DVD formatting section 6 via the V encoder 5. It is accommodated in a video pack as shown at 13. The DVD formatting section 6 also generates a DVD format as shown in FIGS. The following content encryption unit 7 is this DVD
The format is scrambled by a predetermined CSS (content scramble system), and the subsequent modulation circuit 8 EFMplus-modulates the output signal of the content encryption unit 7.

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

The lead-in area of the disc is provided with a variable length copyright management information (CMI) area of 16 bytes (128 bits) to 188 bytes (1504 bits). Then, in this CMI area, as shown in FIG. 21, for example, 64-bit disc manufacturing date data, 52-bit factory code, 8-bit scrambling sync signal, and 60-bit ISRC code (Intern
ational Standard Recording Code) and S of 8 bytes
An 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 (hereinafter,
(Also referred to as CGMCAPS)
CGMCAPS code is recorded. This data is recorded several times, for example, eight times, and the ISRC code and SID code are scrambled and recorded.

In the first and second CGMCAPS codes, the control data area of the lead-in area is RA
It is manufactured and recorded as an M region. And the first
CGMCAPS code is a copy guard management code of 2-channel data material, and its lower 4
The same data is recorded in the bits. Also, the second CG
The MCAPS code is a copy guard management code for 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 bits or 3 bits are used as actual copy management information, and the remaining 1 bit or 2 bits are used as blanks. This data is used as reproduction permission / prohibition information for a reproduction-only machine (and a recording / reproduction machine for reproduction), and is used as copy permission / prohibition information for a recording / reproduction machine for copying. The contents of the information shown in FIG. 22 will be described in detail with reference to the flowcharts shown in FIGS. 24 and 25.

When a plurality of songs are separately managed in the disc for copy management, a CGMCAPS code is provided for each of them. For example, A
It is recorded as flag information in the management area of music such as MG and ATSI without being repeated. Furthermore, a CGMCAPS code is provided for each of the tracks that make up the song. That is, as shown in FIG. 49, the user data (2034 bytes) of FIG. 13 is composed of a packet header, substream ID, audio frame information, audio data information (ADI) and audio data, and the sampling frequency for this track, etc. It is recorded as flag information in a management area (ADI) for recording recording conditions. Furthermore, in the TOC information, CGMC
An APS code is provided. The first and second CGM
Instead of repeatedly recording each CAPS code in each 1-byte area, each 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 disc, C
An IC having a memory storing a GMCAPS code and a CPU is embedded in a disc, and a read-only machine or a recording / playing machine sends a read control signal to this IC to send C
Alternatively, 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 disc is EFMplus demodulated by the demodulation circuit 11, then descrambled by the scramble decoding section 12, and then the lead-in area data, A-CONT pack, A by the DVD deformatting section 13. Separated into packs and V packs. The A pack is sent to the signal processing circuit 14 and the memory 15 to be restored to 2-channel or multi-channel audio data, and 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 the V decoder 17
To the 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 particularly executes the processing shown in FIGS. 24 and 25 based on the lead-in area data.

FIG. 24 shows the processing when only reproduction is performed. In FIG. 24, first, information in the lead-in area is read (step S30), and then it is determined whether the disc is a ROM disc or a RAM disc (steps S31 and S32). In the case of a ROM disc, the CGMCAPS code is judged. When (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, S40), ・ When no CGMCAPS code is detected, reproduction is permitted (steps S41, S42).

In the case of a RAM disk, the CGMCAPS code is also determined. When (1, 1), reproduction is prohibited (step S4).
(3, S44), ・ When (1, 0), reproduction is prohibited (step S4).
5, S46), ・ When (1, 0, 1), reproduction is permitted (step S
47, S48), ・ When (0, 0), reproduction is permitted (step S4
9, S50), ・ When the CGMCAPS code is not detected, reproduction is permitted (steps S51, 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 judged. When (1,1), copying is prohibited (step S6).
1, S62), · CGMCA of copy source disk when (1, 0)
The PS code is rewritten to (1,0,1) to permit copying (steps S63 and S64). When (1,0,1), copying is prohibited (steps S65 and S66). ), Copying is permitted (step S6).
7, S68),-When the CGMCAPS code is not detected, copying is permitted (steps S69 and S70). Therefore, C
A disc in which the GMCAPS code is rewritten from (1,0) to (1,0,1) is prohibited from being reproduced as shown in FIGS. The disc having the CGMCAPS code of (1, 1) is for a specific application that cannot be reproduced by a commercially available player and can be reproduced only by a specific player.

In the above embodiment, the two-channel and multi-channel audio signals related to the same audio source are recorded on the disc. Therefore, a user having a two-channel type amplifier and speaker can reproduce two channels. In addition, a user having the multi-channel system can reproduce the multi-channel. However, in the future, there will be two multi-channel systems.
Considering that the data will be more widely used than channels, it is considered desirable to record more than two channels of data on the disc at this time.

In order to cope with such a market as shown in FIG. 26, when recording, for example, a plurality of music pieces on one disc, one music piece is recorded by 2 + 6 channels and the other music pieces are recorded by 6 channels. It shows how to record only. Therefore, according to such a recording method, a user having a multi-channel type amplifier and a speaker has two
It would be convenient if the number of users of the channel system is larger. Also, regarding the sampling frequency and the number of quantization bits of the music recorded on only 6 channels, it should be different from that for the 6 channels of the music recorded on 2 + 6 channels.
For example, the recording may be performed with higher quality.

FIG. 27 shows a modification of the copy management data. The area of the disc is roughly the PCA (post cutting area) part from the inner circumference to the outer circumference,
It is composed 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 area is composed of 16 sectors "1" to "16". Physical format information is recorded in sector "1", disk manufacturing information is recorded in sector "2", and sector "3" is recorded. And "4" in Fig. 2
Copyright information as detailed in 8 is recorded.

First byte of sector "3" and "4" and 2
The first and second CGMC of 4 bits each in the byte
The APS code is recorded. And the first CGMCA
The PS code is a copy guard management code of 2-channel data material, and the second CGMCAPS code is
It is a copy guard management code for multi-channel data material (content). The 3rd to 19th bytes indicate the music (program source) ISRC (International Standard Recording Code: International Standard Rec).
oring Code) SID indicating the code and the disc manufacturer
(Source ID) This is a code area. 8 at the 3rd byte
A scrambling sync signal of a 1-bit ISRC code and a SID code is recorded, a 60-bit ISRC code is scrambled and recorded in the 4th to 11th bytes, and an SI for 8 characters is recorded in the 12th to 19th bytes.
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 bytes are recorded.
Nine titles are recorded. Instead of scrambling both ISRC code and SID code, SID
Only the code may be scrambled. Note that, in FIG. 28, “I” shown as an example of the SID code is shown.
"FPI-L231-7" is the "IFPI" from the International Federation of Record and Video Producers.
Phonogram Industries, now known as International Federati
on of Phonogram and Video Industries).
231 to 7 ”indicates the IFPI mastering code of Victor Company of Japan, Ltd. The ISRC code is 1
It consists of two characters, the first to fifth characters are 6 bits, and the sixth to
The 12th character consists of 4 bits (6 bits are blank).

In the above embodiment, 2 + 6 channels are fs = 48 kHz and the number of quantization bits = 20 or 24.
Although it is said that it is desirable to record in bits,
In the channel, fs = 44.1 kHz and quantization bit number = 16 bits of the CD standard are prevalent. Therefore, in consideration of the convenience of the user having such a reproducing apparatus of the CD standard, as shown in FIG. 29, fs = 44.1 kHz and 88.2 kHz for two channels so as to meet this standard.
z, the number of quantization bits = 16, 20, 24 bits may be recorded. Also in this case,
For example, when recording a plurality of songs on one disc, one song may be recorded on 2 + 6 channels and another song may be recorded on only 6 channels. Also, as shown in FIG. 30, the sampling frequency and the number of quantization bits of the music recorded on only 6 channels should be different from those of the music recorded on 2 + 6 channels for 6 channels. You may

Next, the second embodiment will be described.
FIG. 31 shows the basic format of a DVD-Van (video + audio navigation) disc as the 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. 37 shows the PCI general information of FIG. 36 in detail, FIG. 38 shows the recorded information of FIG. 36 in detail, and FIG. 39 shows 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 seamless angle change by the seamless angle information of FIG. 43 shows an example of the VOBU search information of FIG. 39, and FIG.
4 shows the VOBU search information of FIG. 39 in detail, and FIG.
Shows the synchronization information of FIG. 39 in detail. Also, in FIG.
Shows the structure of the lead-in area of the disks 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, the audio player controls the reproduction of the A pack.
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 the 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 shown in FIG. 31 so that it can be played back using various DVD players.
As shown in (a), it is roughly divided into a video manager (VMG) and an audio manager (AMG) at the beginning, followed by a plurality of video title set (VTS) and audio title set (ATS) areas. . That is, the basic format of this DVD-Van disc includes both the DVD video disc shown in FIG. 1 (a) and the DVD audio disc shown in FIG. 1 (b) and FIG. 31 (b). In addition, these AM
G and ATS are AMG shown in FIG. 1 (b) and FIG. 31 (b).
Since it has the same function as that of ATS and ATS, its explanation is omitted.

Then, each of the VTS and ATS is the beginning VTS information (VTSI) and ATS information (ATSI), respectively, followed by one or more video content block sets (VCBS).
And audio content block set (ACBS)
And the last VTSI and ATSI. Further, 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 is for one title of video and each of the ACBs is for one title of audio. Each VCB (1 title) is composed of a plurality of chapters, while each ACB (1 title) is composed of a plurality of tracks correspondingly. A chapter contains a part of title (PTT), and a track contains a part of title (PTT).

Each chapter is made up of a plurality of cells, while each track is made up of a plurality of indexes corresponding thereto. Each cell has more than one V
Each of the indexes is composed of a plurality of ACB units (ACBU) corresponding to the CB unit (VCBU). The VCB unit (VCBU) is A-C as shown in detail in FIG.
It does not include an ONT pack, but is composed of a leading CONT pack, a relatively large number of A packs, and a relatively small number of V packs. Further, this ACBU is composed of an arbitrary number of packs for 0.4 to 1.0 seconds, which has the first A pack after the V pack as the head and has substantially the same interval as the VCBU. 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 the VMG (video manager) shown in FIG. 31 (a). 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 one A-CONT pack provided for each ACB unit (every 0.5 to 1.0 seconds), so that it is used for a large number of screens. However, in the second embodiment, like VMG (video manager) and AMG (audio manager) or VTS (video title set) and ATS (audio title set),
Since it accommodates both DVD video disc and DVD audio disc data, the amount of data that can be accommodated is limited,
Therefore, a relatively small amount of data such as the title name of each song or movement is stored. Also, the audio reproduction control information described in detail below may be stored in one kind.

Further, 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. May be composed of a 294-byte area relating to the character "1" of one language for displaying "" and an audio reproduction control information area of 294 bytes. 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, audio reproduction control information areas (250 bytes) for 10 types of 25 bytes each and a reserved 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. To be done. These pieces of audio reproduction control information are, for example, according to the genre (classical, jazz, rock, BGM) of the music when the user reproduces the music arranged in the A pack, and even if the music is the same genre. This data is recommended by a so-called professional mixer so that the sound quality at the time of reproduction becomes the best according to the playing condition, recording condition, mood, etc. of the music. When the number of channels of the audio signal is 6, the holding area stores mixing coefficients such that the number of channels is mixed down to 2 and stereo reproduction is possible.

Since the CONT pack is used when seamlessly reproducing the A pack, the ASD, as shown in FIG. 34, has 8-byte current number information and 16-byte current time in the first embodiment (FIG. 17). Information is omitted, and that portion is used as a reserved area (76 bytes). For this reason, although it is not possible to perform detailed display and reproduction control as in the first embodiment, as in the first embodiment, a disc that can be reproduced only by the DVD audio disc dedicated player and cannot be reproduced by the DVD video disc dedicated player becomes widespread. It is possible to realize an effective audio disc in the transition period.

Next, the structure 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 has a 14-byte pack header, a 24-byte system header, and a PCI (presentation control information).
It is composed of a packet and a DSI (Data Search Information) packet. PCI is called reproduction 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 of 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 (1024 bytes in total).

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

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

"LVN of NV pack" (NV PCK
The address of the NV pack that contains this PCI is in the LBN) from the first LB of the VOBS that contains this PCI to the RLB.
Described in N, and also "VOBU category"
The state of the analog protection system (APS) of this VOBU is described in (VOBU CAT).

The non-seamless angle information (NSML AGLI) shown in FIG. 36 is information relating to the destination address when the angle is changed, and when the angle cell change is changed non-seamlessly, that is, the seamless angle change. Only valid if 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, and based on this information, the mixing ratio (contrast) of the video and sub-picture colors in the specific rectangular area. ) Can be changed. Also, the 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).

The recording information (RECI) shown in FIG. 36 is, as shown in detail in FIG. 38, 10 bytes of "ISRC of video data in video stream" (ISRCV), and 10 bytes of "decoding audio". -ISRC of audio data in stream # 0 "(ISRC
A0), 10-byte “ISRC of audio data in decoding audio stream # 1” (ISRC
A1), 10-byte “ISRC of audio data in decoding audio stream # 2” (ISRC
A2), 10-byte “ISRC of audio data in decoding audio stream # 3” (ISRC
A3), 10-byte "ISRC of audio data in decoding audio stream # 4" (ISRC
A4) and 10 bytes of "ISRC of audio data in decoding audio stream # 5" (ISRC
A5), 10 bytes of "ISRC of audio data in decoding audio stream # 6" (ISRC
A6), and · 10-byte “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), 10-byte “decoding SP stream #
ISRC of SP data in 1, # 9, # 17 or # 25 ”
(ISRC SP1), 10-byte “decoding SP stream #
ISR of SP data in 2, # 10, # 18 or # 26
C "(ISRC SP2), 10 bytes of" decoding SP stream #
ISR of SP data in 3, # 11, # 19 or # 27
C "(ISRC SP3), 10 bytes of" decoding SP stream #
ISR of SP data in 4, # 12, # 20 or # 28
C "(ISRC SP4), 10 bytes of" decoding SP stream #
ISR of SP data in 5, # 13, # 21 or # 29
C "(ISRC SP5), 10 bytes of" decoding SP stream #
ISR of SP data in 6, # 14, # 22 or # 30
C "(ISRC SP6), 10 bytes of" decoding SP stream #
ISR of SP data in 7, # 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
39. I) is navigation data for searching data and executing seamless reproduction of VOBU.
32 bytes of DSI general information (DSI GI) and 148 bytes of seamless playback information (SML PB).
I) and 54 bytes of seamless angle information (SML A
GLI), 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 the figure, 4-byte "NV PCK SCR base" (NV
PCK SCR) ・ 4 bytes of "LVN of NV PCK" (NV PCK
LBN), 4-byte "VOBU end address" (VOBU
EA), and 4-byte “end address of the first reference picture of VOBU” (VOBU 1STREF EA).
And 4 bytes “the end address of the second reference picture of VOBU” (VOBU 2NDREF EA)
And 4-byte “End address of third reference picture of VOBU” (VOBU 3RDREF EA)
2 bytes "VOBU VOB ID number" (VOB
U VOB 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
As shown in detail in FIG. 41, L PBI is a 2-byte “seamless VOBU category” (VO
BU SML CAT), 4-byte "End address of interleaved unit" (ILVU EA), 4-byte "Start address of next interleaved unit" (NXT ILVU SA), 2-byte “Next Interleaved Unit Size” (NXT ILVUSZ), and 4 bytes “Video Start PTM in VOB” (VO
B VS PTM), 4 bytes of "End PTM of video in VOB" (VO
B VE PTM), 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 regarding the destination address when the angle is changed as shown in FIG. 42, and when the angle change is executed seamlessly, that is, when the seamless angle change flag is "seamless". Only valid when set to "."

The VOBU search information (VO
BU SRI), as shown in FIG.
0. Before and after the playback start time of the VOBU including this DSI.
The start address of the VOBU reproduced in 5 × n seconds is described, and it is valid only within one cell. This information is as shown in detail in FIG. 44: 4-byte "next VOBU start address having video data" (FWDI Video), 4-byte "+240 VOBU start address and video existence flag" (FWDI240), 4-byte "+120 VOBU start address and video present flag" (FWDI120), 4-byte "+60 VOBU start address and video present flag" (FWDI60), 4-byte "+20 VOBU start address and video present flag" ( FWDI20), 4-byte "+ 15VOBU start address and video present flag" (FWDI15), 4-byte "+ 14VOBU start address and video present flag" (FWDI14), 4-byte "+ 13VOBU start address and video" Existence Lag "(FWDI13), 4-byte" + 12VOBU start address and video present flag "(FWDI12), 4-byte" + 11VOBU start address and video present flag "(FWDI11), 4-byte" + 10VOBU start " Address and video present flag "(FWDI10), 4-byte" + 9VOBU start address and video present flag "(FWDI 9), 4-byte" + 8VOBU start address and video present flag "(FWDI 8), 4-byte "+ 7VOBU start address and video present flag" (FWDI 7), 4-byte "+ 6VOBU start address and video present flag" (FWDI 6), 4-byte "+ 5VOBU start address and video present flag" (FWDI 5) ・ 4 bytes "+ 4VOBU start address and video present flag" (FWDI 4), 4-byte "+ 3VOBU start address and video present flag" (FWDI 3), and 4-byte "+ 2VOBU start address and video present flag" (FWDI 4) 2), 4 bytes of "+ 1VOBU start address and video present flag" (FWDI 1), 4 bytes of "next VOBU start address and video present flag" (FWDI Next), 4 bytes of "previous" VOBU start address and video present flag "(BWDI Prev) of 4 bytes," -1VOBU start address and video present flag "(BWDI 1) of 4 bytes," -2VOBU start address and video present flag "of 4 bytes ( BWDI 2), 4 bytes of "-3VOBU start address and video Presence flag "(BWDI 3), 4-byte" -4VOBU start address and video presence flag "(BWDI 4), 4-byte" -5VOBU start address and video presence flag "(BWDI 5), 4-byte "-6 VOBU start address and video present flag" (BWDI 6), 4-byte "-7 VOBU start address and video present flag" (BWDI 7), 4-byte "-8 VOBU start address and video Presence flag "(BWDI 8), 4-byte" -9 VOBU start address and video present flag "(BWDI 9), 4-byte" -10 VOBU start address and video present flag "(BWDI10), 4 "-11 VOBU start address and video existence flag" (BWDI11) of byte, and 4 bytes "-12 VOBU start address and video present flag" (BWDI12), 4-byte "-13 VOBU start address and video present flag" (BWDI13), and 4-byte "-14 VOBU start address and video present flag" ( BWDI14), 4-byte "-15VOVO start address and video present flag" (BWDI15), 4-byte "-20VOBU start address and video present flag" (BWDI20), 4-byte "-60VOBU start Address and video present flag "(BWDI60), 4-byte" -120VOBU start address and video present flag "(BWDI120), 4-byte" -240VOBU start address and video present flag "(BWDI240), The 4-byte "video It is constituted by VOBU start address of before with other "(BWDI Video).

Synchronization information (SYNCI) shown in FIG.
Is address information of audio data and sub-picture data reproduced in synchronization with VOBU video data including the DSI. As shown in detail in FIG.
K) address ”(A SYNCA 0 to 7), 4 bytes x 32" target sub-picture pack (SP)
VOBU start 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 the sector number "02F000 from the lead-in start.
Blocks of all 00h before "h", sector number "02F000h" to sector number "02"
Two reference code blocks before F020h ”, and sector number“ 02F020h ”to sector number“ 02
All 00h for 30 blocks before "F200h"
Block of sector number from “02F200h” to sector number “02
192 control data blocks before FE00h ”, and sector number“ 02FE00h ”to sector number“ 03
All 00h for 32 blocks before "0000h"
It is composed of blocks.

Data of ISO9660 and micro UDF (Universal Disk Format) is recorded from the beginning of the data area (sector number "030000h"), and then audio title set (T
S), video TS, computer TS, etc. are recorded.

As shown in FIG. 47, the control data block in the lead-in area is composed of a physical format information sector, a disc manufacturing information sector, and a copyright information sector. Further, as shown in FIG. 48, the physical format information sector includes a book type and part version area, a disc size and minimum lead-out rate area, a disc structure area, a recording density area, and a data area. It consists of areas such as area allocation.

The area of the book type and the part version is assigned as a disc identifier, and depending on the upper bits thereof, "DVD-ROM disc", "DVD-RAM disc", or "DVD-write once (Write Once) disc is indicated, and in the case of a "DVD-ROM disc", depending on the lower bits, "computer program disc", "pure video disc", "video + audio navigation," disk:
An identifier indicating "Van disc" or "audio disc" is described.

Therefore, according to this book type and part version, the disc according to the first embodiment is described with a disc identifier indicating "DVD-ROM-audio disc", and the disc according to the second embodiment is described. Describes a disc identifier indicating "DVD-ROM-Van disc". In addition, "DVD-ROM-
The "pure video disc" does not have TOC information such as the beginning information of songs and movements, but the "DVD-ROM-audio disc" of the first embodiment and the "DVD-ROM of the second embodiment. The TOC information is provided in the lead-in area of the "-Van disc". This TOC
Information is also called SAPP.

Next, an embodiment in which the digital audio signal formatted as described above is transmitted through a communication line (network) will be described. 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, the data formatted by the DVD formatting section 6 and encrypted by the content encryption section 7 is modulated by the modulation circuit 8 by a modulation method according to the recording medium, and the recording medium is recorded based on the modulated data. It is manufactured, temporarily recorded in the recording unit 19, or transmitted via the communication I / F 20 and the communication line. Further, the data received via the communication line and the communication I / F 20 is supplied to the modulation circuit 8 after being temporarily recorded in the recording unit 19.

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

When the digital audio signal formatted as described above is received via the communication line (network), the header is removed from the packet received from the network as shown in FIG. 52 (step S8).
1), then restore the received data (step S82),
Then, 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 audio signal quantization method 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
It is a signal represented by a modulated signal and is also called DSD data. 53 (A) and 53 (B) show examples of PCM-based quantization and dequantization methods, and FIG. 53 (C) shows 16-bit Δ.
FIG. 53 shows an example of a quantization and inverse quantization method using Σ modulation.
(D) shows an example of a quantization and dequantization method by 1-bit ΔΣ modulation.

The 1-bit stream data is PCM.
Higher efficiency compression is possible than the method. For example, in FIG. 29, P
As an example of quantization in the CM system, 2 channels: 88.2 kHz / 24 bits (4.234)
Mbps) 6 channels: 44.1 kHz / 16 bits (4.234)
Mbps) is described. Therefore, if quantization is performed by the 1-bit stream method instead, 2 channels: 88.2 × 24 kHz / 1 bit (4.2
34 Mbps) 6 channels: 44.1 × 16 kHz / 1 bit (4.2)
However, if it is compressed to 1/2, it can be quantized with 6 channels: 88.2 × 16 kHz × 1/2/1 bit (4.234 Mbps). Therefore, in this case, since the sampling frequency of the multi-channel signal having a large amount of data can be made the same as that of the 2-channel signal, it is possible to record by making the frequency bands of 2 channels and 6 channels the same.

[0103]

As described above, according to the first aspect of the present invention, copy management is performed in the case of transmitting both 2-channel type or narrow band type audio data and multi-channel type or wide band type high quality audio data. Since the data is recorded on the disc and the copy of at least the multi-channel audio source is managed, the problem of the copy protection can be solved. According to the second aspect of the invention, when transmitting both 2-channel or narrow-band audio data and multi-channel or wide-band high-quality audio data, at least the copy management data is recorded on a disc and at least Since the copy of the audio source A / D converted and recorded at a relatively high sampling frequency is managed, the problem of the copy protection can be solved.

[Brief description of 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 in detail a format of an audio manager (AMG) shown in FIG.

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

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

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

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

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

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

9 is a diagram showing the audio title set menu audio stream attribute data (ATSM) of FIG.
It is an explanatory view showing in detail (-AST-ATR).

10 is an audio title set / audio stream attribute table (ATS-AS) of FIG. 8;
It is an explanatory view showing the format of (T-ATRT) in detail.

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

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

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

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

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

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

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

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

FIG. 19 is a block diagram showing an audio data encoding apparatus 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 the audio disc 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.

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

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

24 is a flowchart showing a reproduction process of the reproduction device in FIG.

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

FIG. 26 is an explanatory diagram showing sampling frequencies and the number of quantization bits of two channels and multi channels in the modification of the first embodiment.

FIG. 27 is an explanatory diagram showing a lead-in area in a modified example 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 the number of quantization bits of two channels and multi channels in another modification of the first embodiment.

FIG. 30 is a view showing a modification 2 of the modification of the first embodiment.
It is explanatory drawing which shows the sampling frequency and the number of quantization bits of a channel and a multi-channel.

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

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

FIG. 33 is an explanatory diagram showing 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 diagram showing the CONT pack of FIG. 31 in detail.

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

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

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

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

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

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

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

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

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

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

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

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

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 the audio disc according to the present invention.

[Fig. 50] 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] Fig. 53 is a block diagram for describing a quantization method and a dequantization 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 section (formatting means) 7 Content encryption section 8 Modulation circuit 11 Demodulation circuit 12 Scramble decoding section 13 DVD de-formatting section 16 D / A converter 17 V decoder 18 Control unit (copy management means)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tokuhiko Fuchigami             3-12 Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa             Local Victor Company of Japan, Ltd. F-term (reference) 5D044 AB05 BC02 CC04 DE15 DE44                       DE50 DE53 EF05 FG18 HL08                 5D110 AA14 AA27 DA03 DA05 DA06                       DA12 DB02 DE01

Claims (2)

[Claims] 1. An analog audio signal is multi-channel first.
Are recorded as digital audio signals sampled at different sampling frequencies for each channel group and the second channel group and quantized with different quantization bit numbers for the first channel group and the second channel group, and , Quantized with the same or different sampling frequency and number of quantization bits as the multi-channel,
An audio title set including audio titles recorded as stereo 2-channel digital audio signals, a sampling frequency for each of the first channel group and the second channel group of the digital audio signals recorded in the audio titles, and A quantization control information area in which the number of quantization bits is recorded, and copy management data for managing the copy of the multi-channel and stereo 2-channel digital audio signals recorded in the audio title are separately recorded. A copy management data area, a title search information area in which search information for searching a title of the digital audio signal is recorded, and an area of an audio manager menu in which management information of the menu of the digital audio signal is recorded ( A MG
M) and an encoding method of audio data, which comprises: 2. An audio signal recorded by the audio data encoding method according to claim 1 is decoded, and a multi-channel and a stereo two-channel recorded in the audio title are decoded based on the copy management data. A method for decoding audio data, comprising the steps of separately managing copies of digital audio signals.