JP4120941B2 - How to encode an audio disc - Google Patents

Description

The present invention relates to an audio disc encoding method .

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

However, in a DVD (hereinafter referred to as DVD-video), a video signal is recorded as a main and an audio signal is recorded as a slave. Therefore, there are the following problems.
(1) The audio signal is integrated with the video signal, and the recording capacity of the audio signal is small.
(2) The time of the audio signal cannot be managed.
(3) Simple character information such as a song title cannot be extracted.

Compared with video, audio users have a wider range of usage, so a simple playback method is required by providing a TOC (table of content) area like a CD. However, in DVD-Video, a video content block unit is composed of a navigation control pack (CONT pack), a plurality of video (V) packs and an audio (A) pack, and playback of V and A packs is controlled by the CONT pack. Therefore, even if the audio signal is mainly recorded, it cannot be easily reproduced for the user, and there is a problem that the usability is poor.
Also, in DVD-video, time management is performed only in units of video frames, so that even if an attempt is mainly made to record an audio signal, continuity of the audio signal is more important than video, and real-time management is difficult. There is a problem.

In view of the above problems, an object of the present invention is to provide an audio disc encoding method that can be easily played back by a user when audio signals are mainly recorded and is easy to use.
It is another object of the present invention to provide an audio disk encoding method capable of simplifying real-time management when mainly recording audio signals.
Another object of the present invention is to provide an audio disk encoding method that can be played back by a DVD video disk player when mainly recording audio signals.
It is another object of the present invention to provide an audio disc encoding method capable of performing simple reproduction using TOC (table of contents) information when mainly recording audio signals.

In order to achieve the above object, the present invention comprises the following means.
That is,
A first audio pack (A pack) containing first audio data;
An audio title set (ATS) composed of the first audio data and an audio manager (AMG) including information (AMGI) for managing the audio title set, wherein the data structure includes second audio data. A second audio pack containing,
A video pack (V pack) including video data related to the second audio data;
A DVD video standard navigation pack including reproduction management information for managing reproduction of data in the second audio pack and video pack (V pack) without managing reproduction of data in the first audio pack; A method for encoding an audio signal for formatting into a data structure further comprising :
Play pointer table information (SAPP TI) for cueing the title (music) composed of the first and second audio data, and an address for cueing each track (movement) constituting the title a plurality of simple audio play pointer containing information (SAPP # 1~ # n. Here, n is a positive integer) each simple audio play pointer by configured TOC information is constituted by the track units, said its TOC information An encoding method comprising encoding by including a sampling frequency and a quantization bit number of first and second audio data.

  As described above, according to the present invention, since the TOC information is arranged in the reserved area in the copyright information area in the control data block of the DVD-ROM standard, when the audio signal is mainly recorded, the TOC information is easily reproduced. It can be performed.

  Embodiments of the present invention will be described below with reference to the drawings. 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 an audio content block unit of FIG. 1, and FIG. 3 is an audio diagram of FIG. FIG. 4 is a diagram illustrating in detail the format of the pack and video pack, FIG. 4 is a diagram illustrating in detail the format of the audio control pack in FIG. 2, and FIG. 5 is a diagram illustrating in detail the format of the audio character display (ACD) area in FIG. 6 is an explanatory diagram showing an example displayed by the name space information of FIG. 5, FIG. 7 is an explanatory diagram showing in detail the format of the audio search data area of FIG. 4, and FIG. 8 is another example of the audio content block unit of FIG. It is explanatory drawing which shows a structural example.

  FIGS. 1A and 1B show DVD-video and DVD-audio formats, respectively, and the DVD-audio format is compatible with DVD-video although the area names are different. First of all, the DVD-video format is composed of the top video manager (VMG) and the following areas of a plurality of video title sets (VTS), while the DVD-audio format is an audio corresponding to this. Each area includes a manager (AMG) and a plurality of subsequent audio title sets (ATS).

  Each VTS is composed of a leading VTS information (VTSI), followed by one or more video content block sets (VCBS) and a last VTSI, while each ATS corresponds to the leading ATS information (ATSI). ) Followed by one or more audio content block sets (ACBS) and the last ATSI. The performance time of each song in ACBS is set in ATSI in real time.

  Each VCBS is composed of a plurality of VCBs, while each ACBS (title set) is composed of a plurality of ACBs. Each VCB corresponds to one title (Title) of video, and each ACB corresponds to one title (Title) of audio correspondingly. Each VCB (one title) is composed of a plurality of chapters, while each ACB (one title) is composed of a plurality of tracks corresponding thereto. Each of the chapter and the track includes a part of title (PTT).

  Each chapter is composed of a plurality of cells (CELL), while each track is composed of a plurality of indexes (Index). Each cell is composed of a plurality of VCB units (VCBU), while each index is composed of a plurality of ACB units (ACBU) corresponding thereto. Each of the VCB unit and the ACB unit is composed of a plurality of packs, and one pack is composed of 2048 bytes.

  Each VCB unit is composed of a head navigation 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 them is composed of a leading audio control pack (hereinafter referred to as A-CONT pack), followed by a plurality of A packs and V packs.

  Information for controlling the subsequent V pack is arranged in the CONT pack, and information for managing the audio signal of the subsequent A pack is arranged in the A-CONT pack like the TOC information of the CD. Audio data is arranged in the A pack, and closed caption (CC) data other than the audio data is arranged in the V pack, in addition to the video data.

  As shown in FIG. 2, the VCB unit is composed of an arbitrary number of packs for 0.4 to 1.0 seconds, and the ACB unit is composed of an arbitrary number of packs for 0.5 to 1.0 seconds. Has been. 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 in the range of 0.5 to 1.0 seconds at the index break. The audio time (GOF: Group of Audio Frame unit) is indicated by an A-CONT pack, and the data position is determined by the number of audio frame numbers, first access unit pointers, and frame headers. Also, the A pack immediately before the A-CONT pack does not force padding in units of 0.5 second of the audio time.

  The adjacent A packs are arranged so that the 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 similarly in the case of a multi-channel of 5 channels. Adjacent to each other. The V pack is arranged adjacent to the A pack when video is displayed during reproduction of the audio signal. As shown in FIG. 3, the A pack and the V pack are a 4-byte pack start information and a 6-byte SCR (System Clock Reference) for 2034 bytes of user data (A data and V data). ) Information, 3 bytes Mux rate (multiplex rate: multiplexing rate of program stream) information and 1 byte of stuffing in total 14 bytes are added (1 pack = total of 2048 bytes). In this case, the time of the A pack in the same title can be managed by setting the SCR information as a time stamp as “1” in the first pack in the ACB unit and continuing in the same title.

  On the other hand, as shown in FIG. 4, the A-CONT pack has a 14-byte pack header, a 24-byte system header, a 1003-byte ACD (audio character display) packet, and a 1007-byte ASD (audio search data). ) Consists of packets. The ACD packet has a 6-byte packet header, a 1-byte substream ID, 636-byte ACD (audio character display) information as shown in detail in FIG. 5, and a 360-byte reserved area (reserved). May be indicated). The ASD packet is similarly composed of a 6-byte packet header, a 1-byte substream ID, and a 1000-byte ASD (audio search data) as shown in detail in FIG.

  As shown in detail in FIG. 5, the 636-byte ACD information area has a 48-byte general information area and a 294-byte area for each of the first language character “1” and the second language character “2”. Each area is composed of a 93-byte name space area, two 93-byte free space areas, and a 15-byte data pointer area. In one name space area of the first language character “1” and the second language character “2”, for example, data for displaying the music title in Japanese is arranged as shown in FIG. In the namespace area, data for displaying in English is arranged. The display language may be determined by the disc publisher.

  The 48-byte general information includes, for example, 16-byte service level information, 12-byte language code information, 6-byte character set code information, 6-byte display item information, and 2-byte “previous ACD information”. Difference information and 6-byte hold information. The 16-byte service level information indicates the display size, display type, audio / video / SP distinction, stream, etc., and the character is mandatory (required) and the bitmap is optional (optional). The 12-byte language code information indicates the language of the characters “1” and “2” by 2 bytes, as in the video file, and indicates a maximum of 8 languages in one file. English is mandatory.

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

  As shown in detail in FIG. 7, 1000-byte ASD (audio search data) includes 16-byte general information, 8-byte current number information, 16-byte current time information, and 8-byte title set search information. 8 bytes of title search information, 404 bytes of track search information, 408 bytes of index search information, 80 bytes of highlight search information, and 52 bytes of reserved area.

  The current number information of 8 bytes includes the current title number of the title set (2 bytes: BCD), the current track number of the title set (2 bytes: BCD), and the current index number of the track (2 bytes: BCD). ) And a reserved area (2 bytes). The current time information of 16 bytes 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 remaining title. The absolute time (4 bytes: BCD).

  The 8-byte title set search information is composed of the first sector number (4 bytes) of the title set and the last sector number (4 bytes) of the title set. The 8-byte title search information is composed of the first sector number (4 bytes) of the title and the last sector number (4 bytes) of the title. The 404-byte track search information includes a title track and sector number (4 bytes × 99), a title first track number (4 bytes), and a title last track number (4 bytes).

  The 408-byte index search information includes a track index and sector number (4 bytes × 100), a track first index number (4 bytes), and a track last index number (4 bytes). The 80-byte highlight search information includes a track in-sector number (4 bytes × 10) and a track out-sector number (4 bytes × 10).

  According to such a format, since the A-CONT pack for managing the audio signal of the subsequent A pack such as the TOC information of the CD is arranged at the head of the plurality of A packs, the audio data is the video data. The recording capacity can be increased. Also, the audio time can be managed by the A-CONT pack, and simple character information such as a song name related to the audio data can be extracted by the A-CONT pack.

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

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

Also,
2. If there is image (V) data in the content,
For audio data,
In addition to the above (1) to (3)
(4) The title, the current time in the movement, and the remaining time can be displayed and managed in real time.
For video data,
(1) Search and random access to the three layers of title, PTT, and cell are possible.
(2) Cueing in units of video frames, time search, and random access are possible.
(3) The title, PTT, and cell time can be managed in real time.
(4) Current time and remaining time in PTT or title can be displayed and managed in video frame unit time.

  The ACBU in FIG. 1B includes A-CONT and CONT, but may be configured not to include the V pack and CONT 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 playback function can be simplified, so that a device suitable for a portable playback device can be provided. .

Next, a second embodiment will be described. FIG. 9 shows ACBU and VCBU of the second embodiment, FIG. 10 shows another example of ACD (audio character display) information of the second embodiment, and FIG. 11 shows ASD (audio audio) of the second embodiment. 12 shows the CONT pack of FIG. 9 in detail, FIG. 13 shows the PCI data of FIG. 12 in detail, FIG. 14 shows the PCI general information of FIG. 13 in detail, and FIG. 15 shows the recording of FIG. FIG. 16 shows the DSI of FIG. 12 in detail, FIG. 17 shows the DSI general information of FIG. 16 in detail, FIG. 18 shows the seamless playback information of FIG. 16 in detail, and FIG. 19 shows the seamless use of FIG. FIG. 20 shows an example of the VOBU search information shown in FIG. 16, and FIG. 21 shows the details of the VOBU search information shown in FIG. Shown, Figure 22 shows in detail the synchronization information in FIG. 16.
FIG. 23 shows the configuration of the lead-in area of the first and second embodiments, FIG. 24 shows the control data block of FIG. 23 in detail, and FIG. 25 shows the physical format information of FIG. 24 in detail. Yes.

  Incidentally, in the first embodiment, the ASD (audio search data) in the A-CONT pack shown in detail in FIG. 7 is used for the audio player to control the playback of the A pack. Sometimes it is based on the current number and the current time, and when performing jump playback, it is based on search information for title set search, title search, track search, index search, and highlight search.

  In contrast, the audio disc of the second embodiment has a basic format based on the DVD video standard shown in FIG. 1A so that it can be played back using a DVD video disc player. As shown in FIG. 9, the VCB unit (VCBU) does not include an A-CONT pack, and includes 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 for 0.4 to 1.0 seconds at the same interval as the VCBU with the first A pack after the V pack as the head. Here, VCBU is also called VOBU in the DVD video standard.

  Since ACBU does not include the A-CONT pack, the ACD packet and ASD packet included in the A-CONT pack in the first embodiment are the VMG (video manager) and VTS (shown in FIG. Video title set) or both. Alternatively, as indicated by a broken line in FIG. 1A, they are added corresponding to VMG and VTS and arranged in both the AMG and ATS provided side by side. These AMG and ATS have the same functions as the AMG and ATS shown in FIG.

  Here, since 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 seconds), data for a large number of screens is stored. Although it can be accommodated, in the second embodiment, since it is accommodated in VMG (video manager) or VTS (video title set), the amount of accommodated data is limited, and therefore only the title name for each song or each movement, etc. It is accommodated with a relatively small amount of data. In addition, the audio reproduction control information described in detail below may be accommodated in about one type.

  Further, the ACD area in the ACD packet is configured to have the data of the character “1” in the first language and the character “2” in the second language as in the first embodiment (FIG. 5). Alternatively, as shown in FIG. 10, the data related to the character “2” is omitted, and a 48-byte general information area and a so-called “audio navigation” such as a song name as shown in FIG. 6 are displayed. For example, a 294-byte area and a 294-byte audio reproduction control information area related to the character “1” in one language. 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 playback control information area is arbitrary, and is composed of, for example, 10 types of audio playback control information areas (250 bytes) each having 25 bytes and a 44-byte reserved area. These pieces of audio playback control information are used when the user plays back a song arranged in the A pack, for example, depending on the genre (classic, jazz, rock, BGM) of the song, This data is recommended by a so-called professional mixer so that the sound quality during reproduction is best according to the performance state, recording state, atmosphere, etc. of the music. In the reserved area, when the number of audio signal channels is 6, mixing coefficients are stored so that the number of channels can be reduced to 2 and stereo reproduction can be performed.

  Further, since the CONT pack is used when seamlessly reproducing the A pack, the ASD omits the 8-byte current number information and the 16-byte current time information in the first embodiment (FIG. 7) as shown in FIG. This amount is used as a reserved area (76 bytes). For this reason, detailed display and playback control cannot be performed as in the first embodiment, but a DVD video disc player can be played back. Therefore, only a DVD audio disc player can be played back as in the first embodiment, and a DVD video disc player can be played back. Therefore, it is possible to realize an audio disc that is effective in a transition period until a disc that cannot be reproduced becomes widespread.

  Next, the configuration of the CONT pack will be described in detail with reference to FIG. This CONT pack is called a navigation pack, commonly known as a navigation (NV) pack in the DVD video standard. It is a 14-byte pack header, a 24-byte system header, a PCI (Presentation Control Information) packet, and a DSI (DSI). Data search information) packet. PCI is called reproduction control information. 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. 13 (total of 986 bytes). The DSI packet is composed of a 6-byte packet header, a 1-byte substream ID, and DSI data shown in detail in FIG. 16 (total of 1024 bytes).

  PCI data is navigation data for controlling the playback of VOBU. As shown in detail in FIG. 13, PCI general information (PCI GI) of 60 bytes, non-seamless angle information (NSML AGLI) of 36 bytes, and 694 bytes. 4 highlight information (HLI) and 189-byte recording information (RECI).

The PCI general information is shown in detail in FIG.
4 bytes of “NBN of the NV pack (= CONT pack)” (NV PCK LBN),
-2-byte "VOBU category" (VOBU CAT),
-A 2-byte reserved area,
4 bytes of “VOBU user operation control information” (VOBU UOP CTL),
-4-byte "VOBU start PTM" (VOBU S PTM),
4 bytes of “VOBU end PTM” (VOBU E PTM),
4 bytes of “End of PTM within VOBU PTM” (VOBU SE S PTM),
It consists of a 4-byte “Elapsed In-Cell” (C ELTM) and a 32-byte reserved area.

  In “NV pack LBN” (NV PCK LBN), the address of the NV pack including this PCI is described in RLBN from the first LB of the VOBS including this PCI, and “VOBU category” (VOBU) CAT) describes the state of the analog protection system (APS) of this VOBU.

  The non-seamless angle information (NSML AGLI) shown in FIG. 13 is information related to the destination address at the time of angle change, and when the angle cell change is changed non-seamlessly, that is, the seamless angle change flag is “ Valid only when it is set to “non-seamless”. The highlight information (HLI) shown in FIG. 13 is information for highlighting one rectangular area in the sub-picture display area, and based on this information, the mixing ratio (contrast of video and sub-picture colors in the specific rectangular area is shown. ) Can be changed. Further, the reproduction period of the sub-picture unit (SPU) of each sub-picture stream is the same as the validity period of the highlight information (HLI).

The recording information (RECI) shown in FIG. 13 is detailed as shown in FIG.
10 bytes of “ISRC of video data in video stream” (ISRC V);
10 bytes of “ISRC of audio data in decoding audio stream # 0” (ISRC A0);
10 bytes of “ISRC of audio data in decoding audio stream # 1” (ISRC A1);
10 bytes of “ISRC of audio data in decoding audio stream # 2” (ISRC A2);
10 bytes of “ISRC of audio data in decoding audio stream # 3” (ISRC A3);
10 bytes of “ISRC of audio data in decoding audio stream # 4” (ISRC A4);
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);
10 bytes of “ISRC of audio data in decoding audio stream # 7” (ISRC A7);
-10 bytes of "Decoding-ISRC of SP data # 0, # 8, # 16 or # 24 SP data" (ISRC SP0),
-10 bytes of "Decoding-ISRC of SP data # 1, # 9, # 17 or # 25 SP data" (ISRC SP1),
-10 bytes of "Decoding-ISRC of SP data # 2, # 10, # 18 or # 26 SP data" (ISRC SP2),
-10-byte "decoding-ISRC of SP data # 3, # 11, # 19 or # 27 SP data" (ISRC SP3),
-10 bytes of "Decoding-SPRC ISRC # 4, # 12, # 20 or # 28 SPRC ISRC" (ISRC SP4);
-10 bytes of "Decoding-SPRC ISRC # 5, # 13, # 21 or # 29 SPRC ISRC" (ISRC SP5);
-10 bytes "Decoding-ISRC of SP data # 6, # 14, # 22 or # 30 SP data" (ISRC SP6),
-10 bytes of "Decoding-ISRC of SP data # 7, # 15, # 23 or # 31 SP data" (ISRC SP7),
1 byte “group of SP streams selected for ISRC” (ISRC SP SEL);
-It consists of an 18-byte reserved area.

The data search information (DSI) shown in FIG. 12 is navigation data for searching for data and executing VOBU seamless playback. As shown in detail in FIG. 16, 32-byte DSI general information (DSI GI) When,
148 bytes of seamless playback information (SML PBI),
54-byte seamless angle information (SML AGLI),
-168-byte VOBU search information (VOBU SRI);
144 bytes of synchronization information (SYNCI),
-It consists of a 471-byte reserved area.

As shown in detail in FIG. 17, the DSI general information (DSI GI) is a 4-byte “NV PCK SCR base” (NV PCK SCR),
4 bytes of “NV PCK LBN” (NV PCK LBN),
4 bytes of “VOBU end address” (VOBU EA),
4-byte “end address of first reference picture of VOBU” (VOBU 1STREF EA);
4 bytes of “end address of the 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 "VOBU ID number of VOBU" (VOBU VOB IDN),
A 1-byte reserved area;
1-byte “VOBU cell ID number” (VOBU C IDN);
Consists of a 4-byte “cell elapsed time” (C ELTM).

The seamless playback information (SML PBI) shown in FIG. 16 includes a 2-byte “seamless VOBU category” (VOBU SML CAT), as shown in detail in FIG.
4 bytes of “interleaved unit end address” (ILVU EA),
4 bytes of “Start Address of Next Interleaved Unit” (NXT ILVU SA);
2 bytes of “next interleaved unit size” (NXT ILVU SZ);
4 bytes of “Start PTM of video in VOB” (VOB V S PTM);
4 bytes of “End of video PTM in VOB” (VOB V E PTM),
8 bytes x 8 "End of audio PTM in VOB" (VOB A STP PTM),
-8 bytes x 8 "Gap length of audio in VOB" (VOB A GAP LEN).

  The seamless angle information shown in FIG. 16 is information related to the destination address when the angle is changed as shown in FIG. 19, and when the angle change is executed seamlessly, that is, the seamless angle change flag is set to “seamless”. It is valid only if

In the VOBU search information (VOBU SRI) shown in FIG. 16, in this cell, as shown in FIG. 20, the head of the VOBU played back 0.5 × n seconds before and after the playback start time of the VOBU containing this DSI. An address is described and is valid only within one cell. This information is detailed in FIG.
4 bytes of “next VOBU head address of 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 presence flag” (FWDI 60),
4 bytes of “+20 VOBU start address and video presence flag” (FWDI 20),
4 bytes of “+15 VOBU start address and video presence flag” (FWDI 15),
4 bytes of “+14 VOBU start address and video presence flag” (FWDI 14),
4 bytes of “+13 VOBU start address and video presence flag” (FWDI 13),
4 bytes of “+12 VOBU start address and video presence flag” (FWDI 12),
4 bytes of “+11 VOBU start address and video presence flag” (FWDI 11),
4 bytes of “+10 VOBU start address and video presence flag” (FWDI 10),
4 bytes of “+9 VOBU start address and video presence flag” (FWDI 9),
4 bytes of “+8 VOBU start address and video presence 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 presence flag” (FWDI 6),
4 bytes of “+5 VOBU start address and video presence flag” (FWDI 5),
4 bytes of “+4 VOBU start address and video presence flag” (FWDI 4),
4 bytes of “+3 VOBU start address and video presence flag” (FWDI 3),
4 bytes of “+2 VOBU start address and video presence flag” (FWDI 2),
4 bytes of “+1 VOBU start address and video presence flag” (FWDI 1),
4 bytes of “next VOBU head 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 presence flag” (BWDI 1),
4 bytes of “-2 VOBU start address and video presence flag” (BWDI 2),
4 bytes of “−3 VOBU start address and video presence flag” (BWDI 3),
4 bytes of “−4 VOBU start address and video presence flag” (BWDI 4),
4 bytes of “−5 VOBU start address and video presence flag” (BWDI 5),
4 bytes of “−6 VOBU start address and video presence flag” (BWDI 6),
4 bytes of “−7 VOBU start address and video presence flag” (BWDI 7),
4 bytes of “−8 VOBU start address and video presence flag” (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 of “-11 VOBU start address and video presence flag” (BWDI 11),
4 bytes of “−12 VOBU start address and video presence flag” (BWDI 12),
4 bytes of “−13VOBU start address and video presence flag” (BWDI 13),
4 bytes of “-14 VOBU start address and video presence flag” (BWDI 14),
4 bytes of “−15 VOBU start address and video presence flag” (BWDI 15),
4 bytes of “−20 VOBU start address and video presence flag” (BWDI 20),
4 bytes of “−60 VOBU start address and video presence flag” (BWDI 60),
4 bytes of “−120 VOBU start address and video presence flag” (BWDI 120),
4 bytes of “−240 VOBU start address and video presence flag” (BWDI 240),
-Consists of 4-byte "start address of previous VOBU having video data" (BWDI VIDEO).

The synchronization information (SYNCI) shown in FIG. 16 is 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. X8 "Target Audio Pack (A PCK) Address" (A SYNCA 0 to 7) and 4 bytes x32 "VOBU Start Address for Target Sub-Picture Pack (SP PCK)" (SP SYNCA 0 to 31) ).

Next, disk identifiers of the first and second embodiments will be described. As shown in FIG. 23, the DVD recording area is roughly composed of a lead-in area and a data area. In addition, the lead-in area of the DVD is an all 00h block from the start of the lead-in to the sector number “02F000h”.
A reference code block for two blocks from the sector number “02F000h” to the sector number “02F020h”;
All 30h blocks from sector number “02F020h” to sector number “02F200h” before sector number “02F200h”;
A control data block of 192 blocks from sector number “02F200h” to sector number “02FE00h”;
It is composed of 32 blocks of all 00h blocks from the sector number “02FE00h” to the sector number “030000h”.

  In addition, ISO 9660 and micro UDF (Universal Disc Format) data are recorded from the head of the data area (sector number “030000h”), followed by audio title set (TS), video TS, computer TS, etc. The

  As shown in FIG. 24, the control data block in the lead-in area is composed of a sector for physical format information, a sector for disc manufacturing information, and a sector for copyright information. As shown in FIG. 25, the physical format information sector includes a book type and part version area, a disk size and minimum lead-out area, a disk structure area, a recording density area, and data. It consists of area allocation areas.

And the book type and part version areas are assigned as disc identifiers, and their upper bits
・ "DVD-ROM disk" or
"DVD-RAM disk" or "DVD-Write Once disk" is indicated, and in the case of "DVD-ROM disk", the lower bit indicates "computer program disk"
・ "Pure video disk"
An identifier indicating whether “video + audio navigation disc: Van-disc”, “audio disc”, or “audio disc type 2” is described.

  Therefore, according to the book type and part version, the disc identifier indicating “DVD-ROM-audio disc” is described in the disc according to the first embodiment, and “DVD” is indicated in the disc according to the second embodiment. A disk identifier indicating "-ROM-Van-disk" is described. The lead-in area of “DVD-ROM-pure video disc” is not provided with TOC information such as information on the beginning of a song or movement, but “DVD-ROM-audio disc” of the first embodiment. The TOC information is provided in the lead-in area of the “DVD-ROM-Van-disc” of the second embodiment.

  Therefore, according to the second embodiment, since the number of A packs in the VOB unit is larger than that of the V pack, when the V pack is reproduced on the display, a still image or a moving image with less movement is obtained. Since the A pack can be reproduced based on the CONT pack (NV pack) of the DVD video standard, the DVD video player can reproduce it.

  By the way, it is convenient to record audio data in the three layers of title, track, and index for searching or to enable random access, but there is a problem that TOC information becomes complicated. In addition, when performing simple reproduction using the TOC information, there is a problem that the reproduction cannot be performed unless the sampling frequency of the audio data can be specified. When TOC information is recorded in the lead-in area used in a DVD video disc, the TOC information is also difficult to spread unless consideration is given to compatibility with DVD video and convenience of its own accessibility. Will occur.

  Therefore, data can be managed efficiently by arranging the TOC information in track units in ATS order. Also, by storing the sampling frequency and the number of quantization bits of audio data for each track in this TOC information, it is possible to immediately shift to playback when performing simple playback using the TOC information. Further, the TOC information is also recorded in a free area (reserved area) of copyright information of the control data block in the lead-in area adopted for the DVD video disk.

  Also, as shown in FIG. 24, the sector numbers “2” to “15” of the control data block in the lead-in area of the DVD are reserved for copyright information. As an example, the reserved area ( TOC information is arranged in the sector numbers “8” to “15”).

FIG. 26 shows a specific example of this TOC information. This TOC information is called SAPP (Simple Audio Play Pointer)
16-byte simple audio play pointer table information (SAPPTI),
Each is composed of n simple audio play pointers # 1 to #n (SAPP # 1 to #n) of 48 bytes. SAPPTI is a 12-byte SAPPTI identifier, a 2-byte SAPP number and 2 It consists of a byte SAPPTI end address.

SAPP # 1 to #n are each composed of 48 bytes, and the breakdown is as shown in FIG.
-1-byte SAPP title number and
-1-byte SAPP track number,
A 4-byte start presentation time of the first cell of the track pointed to by SAPP;
4 bytes of the playback time of the track pointed to by SAPP;
-4 bytes of the pause time of the track pointed to by SAPP;
As shown in detail in FIG. 28, the 4-byte attribute of the track pointed to by SAPP (SAPP-ATR),
・ 18-byte reserved area,
A 4-byte start address of the track pointed to by SAPP;
A 4-byte start address of the first cell of the track pointed to by SAPP;
• It is composed of a 4-byte end address of the track pointed to by SAPP.

  Also, as the track attribute (SAPP-ATR) of the above 4 bytes (32 bits b31 to b0), the quantization bit number Q is recorded as 4 bits (b23 to b20) as shown in FIG. 28, and the sampling frequency fs is set. Recording is performed with 4 bits (b15 to b12), and a decoding audio stream number is recorded with 3 bits (b7 to b5). Then, the SAPP information is further divided into n tracks (movements) and recorded together with album numbers belonging to the tracks.

  Next, a disk according to a third embodiment will be described with reference to FIGS. FIG. 29 shows a disc DVD-ROM-audio disc type 2 according to the third embodiment. This format is roughly a video title set (VTS) as DVD-video data and an audio title set (ATS as DVD-audio data). ). More specifically, the VTS includes a video manager (VMG) shown in FIG. 1A, a video and audio video manager menu (VMGM), and a VTS <1> managed by the VMGI in the VMG. .

  On the other hand, the ATS is paired with the audio manager (AMG) shown in FIG. 1 (b), the audio manager menu (AMGM) of video and audio, and the audio data in VTS <1> on the VTS side, and in the AMG. The ATS <1> managed by the AMGI and the ATS <2> managed by the AMGI in the AMG are not paired with the VTS side. Further, as shown in FIG. 30, the ATS <2> does not include the A-CONT pack, and is configured only by the A pack. Note that the video title set (VTS) may be omitted, and only the audio title set (ATS) may be used.

  The lead-in area in the disc of the third embodiment is the second embodiment except that the disc identifier indicating “DVD-ROM-audio disc type 2” is described by the book type and part version shown in FIG. The form is the same. Therefore, this disc cannot be played back by a DVD video player but can be played back by a dedicated player, but the TOC information is not available in the copyright information of the control data block in the lead-in area adopted for the DVD video disc. Since recording is also performed in an area (reserved area), simple reproduction can be performed. Similarly to the second embodiment, TOC information is arranged and arranged in units of tracks in the order of ATS, so that data can be efficiently managed. Furthermore, audio data of each track is included in the TOC information. By storing the sampling frequency and the number of quantization bits, it is possible to immediately shift to playback when performing simple playback using TOC information. In each embodiment, the TOC information is recorded in the management area such as AMG or ATS, or in the pack as shown in FIG. 42A or 42B, in addition to recording in the lead-in area. You may make it do.

Next, the configuration of the encoder will be described in detail with reference to FIG. The analog audio signal A is sampled by the A / D converter 31 at a sufficiently high sampling frequency (sampling period Δt), for example, 192 kHz, converted to a 24-bit high-resolution PCM signal, for example, and a data string corresponding to the high-resolution curve α xb1, x1, xa1, x2, xb2, x3, xa2,
..., xbi, x2i-1, xai, x2i, ...
Is converted to

This data string (xbi, x2i-1, xai, x2i) is encoded by the signal processing circuit 32 and the memory 33 into the user data shown in FIG. In the signal processing circuit 32, the band is first limited from the data string (xbi, x2i-1, xai, x2i) corresponding to the high-resolution curve α by a low-pass filter that passes a half band, for example, an FIR filter. Data string corresponding to low resolution curve β xc1, *, *, *, xc2, *, *, *, xc3, *, *, *, ..., xci, *, *, *, ...
Next, by thinning out the data “*” in this data string, the data string xc1, xc2, xc3,..., Xci,.
Is generated.

Here, the data string xci is a data string in which the sampling frequency is reduced to ¼ by limiting the band of the digital data A / D converted by the A / D converter 31. Further, by thinning out the data xi from the data string (xbi, x2i-1, xai, x2i), the data string xb1, xa1, xb2, xa2,..., Xbi, xai,.
Is generated.

Then, based on these data strings xci, xbi, and xai, the difference xbi−xci = Δ1i
xai-xci = Δ2i
Is calculated. Here, the difference data Δ1i and Δ2i is, for example, 24 bits or less, and the number of bits may be fixed or variable. Next, the data string xci and the difference data Δ1i and Δ2i are packed into user data (see FIG. 3) (1 packet = 2304 bytes), and the user data is output to the DVD formatting unit 34.

  Further, the video signal V is converted into a digital signal by the A / D converter 36, and then this digital video signal is encoded into the MPEG format by the V encoder 37, and then packed into the user data shown in FIG. To be applied. The DVD formatting unit 34 is a "DVD-ROM-audio disk" according to the first embodiment, a "DVD-ROM-Van-disk" according to the second embodiment, or a "DVD-ROM-audio disk" according to the third embodiment. Pack in type 2 ”format. The packing data is modulated by the modulation circuit 35 by a modulation method corresponding to the disk, and a disk is manufactured based on the modulation data.

  By the way, in the intermediate process until the final disc is manufactured, after the format is converted into the above format, this is temporarily recorded via the communication interface (I / F) 39 and the communication line or by the recording unit 38 once. Recorded on a recording medium and transmitted to the editor's terminal called a recording producer or engineer via a communication interface (I / F) 39 and a communication line or by handing this intermediate recording medium. Then, the editor edits this, and then modulates it by the modulation circuit 35 with a modulation method corresponding to the disk to manufacture a final disk.

  FIG. 32 is a flowchart showing the processing in this case. The video signal V is input and V-encoding processing is performed as shown in FIG. 31 (steps S101 and S102), and the audio signal A is input and shown in FIG. Are subjected to signal processing (steps S103 and S104), and character information and disc identifiers are further input and encoded (steps S105 and S106). Then, these pieces of information are converted into the DVD format as in the first to third embodiments (step S107) and output for transmission to the editor's terminal (step S108).

  Next, another process is shown. The encoder shown in FIG. 41 is configured so that the computer program CP for decoding the data encoded as described above can be input and stored in the CTS unit of FIG. 29, for example. Alternatively, a program for further encoding is input. FIG. 33 shows this other processing. In step S105, a program for decoding the format as in the first to third embodiments is input and encoded together with character information, a disc identifier, and the like. The processing of the video signal V and the audio signal A is the same as that shown in FIG. Then, the information is converted into a format as in the first to third embodiments, scrambled (step S107), output at a predetermined rate for transmission to the editor's terminal, and other information Recording on the medium (steps S109 and S110).

  FIG. 34 shows a terminal (personal computer) 107 on the data transmission side (encoding side) and the data reception side (the above editor). FIG. 35 shows the processing of the personal computer 106 on the data receiving side. The personal computer 106 has an audio source and a decoding program in the format as in the first to third embodiments from the disk drive device 104 or the network terminal 105. Supplied.

  The personal computer 106 includes a CPU 106a having a special-purpose instruction set added mainly for efficiently processing digital signals such as images and sounds, such as Intel's PP55C extended instruction set (MMX), and data A RAM 106b used as a buffer at the time of processing, a data converter 106c for converting data supplied from the disk drive device 104 or the network terminal 105, and a plurality of processed audio data via a D / A converter and an amplifier An audio interface (I / F) 106d for supplying to speakers (103L and 103R in the figure, and further surround speakers 103C and 103S), a display processor 106e for controlling display of a display unit (not shown), and an illustration (not shown) Mouse and keys An operation signal generating section 106f for generating an operation signal based on the operation input signal from the over-de.

  In such a configuration, as shown in FIG. 35, the CPU 106a of the personal computer 106 on the data receiving side inputs a program load command (command) via a keyboard (not shown) in a state where the above decoding program can be input ( Step S1), the decoding program is loaded into (Step S2), and when loading is completed, the program load flag is set (Step S3), and the process is terminated. At this time, since the CPU 106a is MMX compatible, high-speed signal processing is possible.

  Further, when a play command is input via a keyboard (not shown) in a state where the above audio source can be input, the CPU 106a accesses the first track and reads a disk identifier indicating the type of the disk. It is checked whether or not it is “audio source” (step S4). If YES, a decoding process is executed (step S5), and then the processed audio data and video data are sent to the audio I / F 106d and the display processor 106e, respectively. (Step S6). Next, the process returns to step S5, and the decoding process is repeated. By this processing, the editor can edit an audio signal transmitted via a recording medium or a communication medium. If it is not “DVD audio source” in step S4, “unable to play” is displayed on a display unit (not shown) (step S7), and the process ends. In addition, if necessary, an encoding process may be performed.

  Next, an embodiment in which the above program and a digital audio signal processed by this program are transmitted via a communication line will be described. 36 is a block diagram showing in detail the network terminal 105 in the personal computer 106 shown in FIG. 34, FIGS. 37 and 38 are flowcharts showing the processing of the data converter in FIG. 36, and FIG. 39 is an explanatory diagram showing the communication network. 40 is an explanatory diagram showing packet processing on the network of FIG. The terminal 105 is provided on both the data transmission side and the data reception side personal computer 106, and includes a reception buffer T1 and a transmission buffer T2 connected to the internal bus of the personal computer 106, a data conversion unit T4, and an adapter T3 which is a communication interface. And a terminal T6 and a controller T5.

  As shown in FIG. 37, the data conversion unit T4 on the data transmission side divides the transmission data stored in the transmission buffer T2 into packets of predetermined length (step S41), and then sets the destination address at the beginning of the packet. A header including the same is added (step S42), and this is then output on the network NW via the adapter T3 and the terminal T6 (step S43). As shown in FIG. 38, the data conversion unit T4 on the data receiving side removes the header from the packet received from the network NW via the terminal T6 and the adapter T3 (step S51), and then restores the received data (step S52). Then, this is transferred to the internal RAM 106b shown in FIG. 34 via the reception buffer T1 (step S53).

  The terminal T6 on the data transmission side and the data reception side are connected via a network NW as shown in FIG. 39, for example. In this network NW, data is transmitted in units of packets (1), (2), (3),... Using, for example, a CATV line or a TCP / IP (Transmission Control Protocol / Internet Protocol) protocol called the Internet. In this case, as shown in FIGS. 39 and 40, the packets (1), (2), (3)... Output from the data transmission side are selected by the router R on the network NW and the packets (1) ( 2) Each packet separated by (3)... And then separated by the router R is sent to the data reception side in order of packets (1), (2), (3)... Via the packet switch Pn (n = 1 to k). Are sent to the personal computer 106.

  Therefore, the personal computer 106 on the data receiving side can decode the audio source transmitted from the data transmitting side based on the program on the program RAM 106b.

It is explanatory drawing which shows one Embodiment of the format of DVD-video and the format of DVD-audio concerning this invention. It is explanatory drawing which shows the audio content block unit of FIG. It is explanatory drawing which shows the format of the audio pack of FIG. 2, and a video pack in detail. FIG. 3 is an explanatory diagram showing in detail the format of the audio control pack of FIG. 2. FIG. 5 is an explanatory diagram showing in detail the format of an audio character display (ACD) area in FIG. 4. It is explanatory drawing which shows the example displayed by the name space information of FIG. FIG. 5 is an explanatory diagram showing in detail the format of an audio search data area in FIG. 4. It is explanatory drawing which shows the other structural example of the audio content block unit of FIG. It is explanatory drawing which shows ACBU and VCBU of 2nd Embodiment. It is explanatory drawing which shows the other example of ACD (audio character display) information of 2nd Embodiment. It is explanatory drawing which shows ASD (audio search data) of 2nd Embodiment. FIG. 10 is an explanatory diagram showing the CONT pack of FIG. 9 in detail. It is explanatory drawing which shows the PCI data of FIG. 12 in detail. It is explanatory drawing which shows the PCI general information of FIG. 13 in detail. It is explanatory drawing which shows the recording information of FIG. 13 in detail. It is explanatory drawing which shows the DSI data of FIG. 12 in detail. It is explanatory drawing which shows the DSI general information of FIG. 16 in detail. It is explanatory drawing which shows the seamless reproduction information of FIG. 16 in detail. It is explanatory drawing which shows the concept of the seamless angle change by the angle information for seamless of FIG. It is explanatory drawing which shows an example of the VOBU search information of FIG. It is explanatory drawing which shows the VOBU search information of FIG. 16 in detail. It is explanatory drawing which shows the synchronous information of FIG. 16 in detail. It is explanatory drawing which shows the structure of the lead-in area of 1st, 2nd embodiment. It is explanatory drawing which shows the control data block of FIG. 23 in detail. FIG. 25 is an explanatory diagram showing the physical format information of FIG. 24 in detail. It is explanatory drawing which shows the specific example of TOC information recorded on the copyright information area of FIG. It is explanatory drawing which shows in detail the TOC information recorded on the copyright information area of FIG. It is explanatory drawing which shows the attribute information of FIG. 27 in detail. It is explanatory drawing which shows the basic format of the disk of 3rd Embodiment. It is explanatory drawing which shows a part of audio title set (ATS) of 3rd Embodiment. It is a block diagram which shows the encoding apparatus of an audio disc. It is a flowchart which shows the encoding method of an audio disc. It is a flowchart which shows the other encoding method of an audio disc. It is a block diagram which shows the terminal for transmitting audio data. It is a flowchart which shows the process of the terminal of FIG. It is a block diagram which shows in detail the network terminal in the personal computer shown in FIG. It is a flowchart which shows the process of the data conversion part by the side of data transmission. It is a flowchart which shows the process of the data conversion part by the side of a data reception. It is explanatory drawing which shows a communication network. It is explanatory drawing which shows the packet process on the network of FIG. FIG. 12 is a block diagram showing another example of an audio disk encoding device. It is explanatory drawing which shows other embodiment of the format of DVD-video, and the format of DVD-audio based on this invention.

Explanation of symbols

A Audio pack (first pack)
ACB audio content block ACBS audio content block set ACBU audio content block unit AMG audio manager ATS audio title set ATSI audio title set information A-CONT audio control pack (third pack)
CONT navigation control pack (fourth pack)
V video pack (second pack)
34 DVD formatting part (means for formatting)
106 PC (Transmission means)

Claims (1)

A first audio pack (A pack) containing first audio data;
An audio title set (ATS) composed of the first audio data and an audio manager (AMG) including information (AMGI) for managing the audio title set, wherein the data structure includes second audio data. A second audio pack containing,
A video pack (V pack) including video data related to the second audio data;
A DVD video standard navigation pack including reproduction management information for managing reproduction of data in the second audio pack and video pack (V pack) without managing reproduction of data in the first audio pack; A method for encoding an audio signal for formatting into a data structure further comprising :
Play pointer table information (SAPP TI) for cueing the title (music) composed of the first and second audio data, and an address for cueing each track (movement) constituting the title a plurality of simple audio play pointer containing information (SAPP # 1~ # n. Here, n is a positive integer) each simple audio play pointer by configured TOC information is constituted by the track units, said its TOC information An encoding method comprising encoding by including a sampling frequency and a quantization bit number of first and second audio data.

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