JP3826913B2 - Audio signal encoding method and decoding method - Google Patents

Description

  The present invention relates to an audio signal encoding method and decoding 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), the video signal is recorded as the main and the audio signal is recorded as the 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 the 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. Therefore, 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.

  Therefore, the present invention provides an audio signal encoding method and decoding method that can be easily reproduced by a user when recording an audio signal mainly, is easy to use, and can be easily managed in real time. The purpose is to provide.

In order to achieve the above object, the present invention comprises the means described in 1) and 2) below.
That is,

1) A step of A / D converting an analog audio signal to generate audio data;
An audio title set (ATS) having the audio data, and a still picture set (SPS) having still picture data related to the audio data;
The still picture set ( SPS ) includes a plurality of still picture objects (SPOB) and still picture information (SPSI; also referred to as ASVSI) having a start address map for reproducing the still picture objects (SPOB) ;
The still picture object (SPOB) is
Substantially no sub-picture pack consists of a highlight pack and button display sub-picture data consisting of button operation for the highlight data of still pictures, first still picture having a still picture pack consisting of the still picture data An object (SPOB) ,
The highlight pack, the sub-picture pack, and the second still picture object (SPOB) having the still picture pack are configured.
The still picture information ( SPSI ) has palette information (ASVOBS sub-picture palette) for decoding the sub-picture data of the second still picture object (SPOB) ,
Further, the audio title set ( ATS ) has audio title set information ( ATSI ) including still picture control information ( SPCIT ) for page control of the still picture data ,
Further, the still picture control information (SPCIT) has a data structure including an effect mode at the start of each still picture and a start effect mode and a start effect period representing the effect period, respectively .
When the sub-picture pack has a pack header and a sub-picture packet, the sub-picture packet has a packet header and sub-picture data, and the sub-picture pack is a pack including the first data of sub-picture data, A step of formatting information indicating that into a data structure provided in the packet header of the pack;
An audio signal encoding method comprising:
2) A method of decoding data generated by encoding according to the audio signal encoding method of claim 1,
A first decoding step of decoding palette information (ASVOBS sub-picture palette) for restoring a sub-picture of the second still picture object (SPOB) arranged in the still picture information (SPS I) ;
A second decoding step of decoding highlight data, sub-picture data and still picture data from the highlight pack, sub-picture pack and still picture pack arranged in the second still picture object (SPOB) ;
A third decoding step for decoding the effect mode and the effect period at the start of each still picture from the still picture control information (SPCIT);
Restoring at least the sub-picture data extracted in the second decoding step based on the information extracted from the first decoding step ( ASVOBS sub-picture palette) and outputting it together with the highlight data ;
The effect mode at the start of each still picture and its effect period are controlled by the start effect mode and the start effect period extracted in the third decoding step ,
Having a decoding method.

  As described above, according to the present invention, when an audio signal is mainly recorded, it can be easily reproduced for the user, and it is easy to use, and real-time management can be simplified.

  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 applied to the present invention. FIG. 2 is an explanatory diagram showing in detail an audio manager (AMG) format of FIG. 3 is an explanatory diagram showing in detail the format of the audio title set (ATS) in FIG. 1, FIG. 4 is an explanatory diagram showing in detail the format of the audio manager information (AMGI) in FIG. 2, and FIG. 5 is an audio title set attribute in FIG. FIG. 6 is an explanatory diagram showing in detail the format of the table (ATS-ATRT), FIG. 6 is an explanatory diagram showing in detail the format of the audio title set attribute data (ATS-ATR) in FIG. 5, and FIG. ATSI) Former 8 is an explanatory diagram showing in detail the format of the audio title set information management table (ATSI-MAT) in FIG. 7, and FIG. 9 is an audio title set menu, audio stream attribute data (ATSM) in FIG. -AST-ATR), FIG. 10 is an explanatory diagram showing in detail the format of the audio title set / audio stream attribute table (ATS-AST-ATRT) in FIG. 8, and FIG. 11 is each audio stream in FIG. It is explanatory drawing which shows the attribute data (ATS-AST-ATR) in detail.

  12 is an explanatory diagram showing the audio content block unit (ACBU) in FIG. 1, FIG. 13 is an explanatory diagram showing in detail the format of the audio pack and video pack in FIG. 12, and FIG. 14 is an audio control (A-) in FIG. FIG. 15 is an explanatory diagram showing in detail the format of the audio character display (ACD) area of FIG. 14, and FIG. 16 is an explanatory diagram showing an example displayed by the name space information of FIG. 17 is an explanatory diagram showing in detail the format of the audio search data (ASD) area of FIG. 14, and FIG. 18 is an explanatory diagram showing a modification of the audio content block unit of FIG.

  Here, in the DVD-audio disc of this description, two channels for stereo and 5/6/8 channels are used as audio signals so as to correspond to a transition period when the CD generation is shifted to the DVD-audio generation. Both signals are recorded. Further, it is considered that only the 5/6/8 channel multi-channel signal is recorded when this transition period has passed. Even when only a multi-channel signal is recorded, it is possible to generate a 2-channel signal from the multi-channel signal using a downmix coefficient during reproduction. This generated 2-channel signal is positioned as simple reproduction.

  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 head video manager (VMG) and the following areas of a plurality of video title sets (VTS), while the DVD-audio format corresponds to this. 2 includes an audio manager (AMG) shown in detail in FIG. 2 and a plurality of audio title sets (ATS) following AMG as shown in detail in FIG.

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.
In the present invention, menu information for displaying a menu screen is recorded in the first ACBS. This is the same as DVD video and will not be described.

  Each VCBS is composed of a plurality of VCBs, while each ACBS is composed of a plurality of ACBs. Each VCB corresponds to one video title, and each ACB corresponds to one audio title. Each VCB (one title) is composed of a plurality of chapters (Chapter), while each ACB (one title) is composed of a plurality of tracks (Track) corresponding thereto. The chapter includes a part of title (PTT), 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 leading control pack (hereinafter referred to as CONT pack), followed by an audio (A) pack, a plurality of video (V) packs, and a sub-picture (SP) pack. 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, AMG (Audio Manager)
Audio manager information (AMGI) shown in detail in FIG. 4, Audio content block set (AMGM-ACBS) for AMG menu,
・ AMGI for backup
Have AMGM-ACBS is as control information ・ Presentation control information (PCI),
・ Data search information (DSI)
Have

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

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

ATS-ATRT (Audio Title Set / Attribute Table) is shown in detail in FIG.
Audio title set attribute table information (ATS-ATRTI),
An audio title set attribute search pointer (ATS-ATR-SRP # 1 to #n) of each of a plurality (n) of ATSs;
Audio title set attribute data (ATS-ATR- # 1 to #n) of each of a plurality (n) ATSs as shown in detail in FIG.
Have

Each of the audio title set attribute data (ATS-ATR- # 1 to #n) includes: ATS-ATR-EA (end address), as shown in detail in FIG.
ATS-CAT (category),
・ ATS-ATRI (Information)
Have

As shown in FIG. 7 in detail, ATSI (ATS information) shown in FIG.
・ Audio title set information management table (ATSI-MAT) shown in detail in FIG.
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)
Have

As shown in detail in FIG. 8, the ATSI-MAT (Audio Title Set Information Management Table) shown in FIG.
ATS-ID (identifier)
ATS-EA (end address),
・ 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-AST-ATR (ATSM audio stream attributes) as shown in detail in FIG. 9,
ATS-AST-Ns (number of ATS audio streams);
ATS-AST-ATRT (ATS audio stream attribute table) as shown in detail in FIG.
Have

  The ATSM-AST-ATR is composed of 8 bytes (bits b63 to b0) as shown in detail in FIG. 9, and the following data (1) to (4) are used as attributes of the encoded audio signal recorded on the disc. ) Is placed (other bits are reserved).

(1) Audio encoding mode (3 bits b63 to b61)
000b: Dolby AC-3
010b: MPEG-1 or MPEG-2 (no extension bitstream)
011b: MPEG-2 (with extended bitstream)
100b: Linear PCM audio 101b: Linear PCM audio (including 2ch + 5ch, 2ch + 6ch, 2ch + 8ch)

(2) Quantization / DRC (dynamic range control) information (2 bits b55, b54)
"11b" when the audio encoding mode is "000b"
When the audio encoding mode is “010b” or “011b”
00b: Dynamic range control data does not exist in the MPEG audio stream 01b: Dynamic range control data exists in the MPEG audio stream 10b, 11b: Hold ・ When the audio encoding mode is “100b” or “101b”, stereo For 2ch 00b: 16 bits 01b: 20 bits 10b: 24 bits 11b: Hold

(3) Sampling frequency fs (2 bits b53, b52)
Stereo 2ch 00b: 48kHz
01b: 96 kHz
10b: 192 kHz
(4) Number of audio channels (3 bits b50 to b48)
000b: 1ch (monaural)
001b: 2ch (stereo)
010b: 3ch
011b: 4ch
100b: (stereo 2ch + 5ch)
101b: (stereo 2ch + 6ch)
110b: 7ch
111b: (stereo 2ch + 8ch)

  As shown in detail in FIG. 11, the ATS-AST-ATRT (ATS audio stream attribute table) shown in FIG. 10 has ATS-AST-ATR for each of audio streams # 0 to # 7, and ATS-AST-ATR. Each is composed of 8 bytes (64 bytes in total).

As shown in FIG. 11, the ATS-AST-ATR of one audio stream is 8 bytes (bits b63 to b0) similar to the audio title set menu audio stream attribute data (ATSM-AST-ATR) shown in FIG. In addition to the attribute data (1) to (4),
(5) Multi-channel extension (1 bit b60),
(6) Audio type (2 bits b59, b58);
(7) Audio application mode (2 bits b57, b56);
(8) Thinning information (2 bits b47, b46) of the stream (AST) and (9) Thinning information of only LFE (Low Frequency Effect) 1ch (2 bits b45, b44)
Each data. And (7) audio application mode of this DVD audio disc is
11b: 2ch + surround mode is recorded, and (8) the stream thinning information and (9) the thinning information of only LFE1ch are both band information. 00b: full (1/1)
01b: Half (1/2)
10b: Quarter (1/4)
Is recorded.

  However, (4) the number of audio channels in this ATSM-AST-ATR is always 2ch in the audio stream # 0, and the audio stream # 1 includes the front 3ch. That is, for example, when an audio signal of one title is recorded in 2 + 6ch, a 2ch stereo signal is assigned to the audio stream # 0, and among the 6ch, a 3ch front signal is assigned to the audio stream # 1, a 2ch rear signal and the LFE1ch. Assign the signal to audio stream # 2. The audio manager information management table (AMGI-MAT) shown in FIG. 4 and the audio title set information management table (ATSI-MAT) shown in FIG. Is recorded.

Also, when the 2 + 6ch analog audio signal is sampled at the following sampling frequency fs and quantized with the following number of quantization bits, for example,
Stereo 2 ch: 48 kHz, 20 bits Front 3 ch: 96 kHz, 16 bits Rear 2 ch, LFE 1 ch: 48 kHz, 16 bits (no decimation)
In the audio title set menu, audio stream, and attribute data (ATSM-AST-ATR) shown in FIG.
(2) Quantization / DRC
01b: 20 bits (3) Sampling frequency fs
00b: 48 kHz
(4) Number of audio channels 101b: (stereo 2ch + 6ch)
Is recorded.

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

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

The ATS-AST-ATR of the audio stream # 2 is (1) audio coding mode 101b: linear PCM audio (including 2ch + 5ch, 2ch + 6ch, 2ch + 8ch).
(2) Quantization / DRC
00b: 16 bits (3) Sampling frequency fs
00b: 48 kHz
(4) Number of audio channels 010b: 3ch
(7) Audio application mode 11b: 2ch + surround mode (8) Thinning out information of the stream 00b: Full (1/1)
(9) Thinning information only for LFE1ch 00b: Full (1/1)
Is recorded.

  Next, the A pack in which the audio stream is recorded and the 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 composed of an arbitrary number of packs for 0.5 to 1.0 seconds. Yes. 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.

  Adjacent A packs are arranged so that audio signals are related to each other. For example, in the case of stereo, an L channel pack and an R channel pack are arranged adjacent to each other, and a 5/6/8 channel multi-channel is arranged. In the same way, they are arranged 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. 13, 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, a 3-byte Mux rate information, and a 1-byte stuffing total 14-byte pack header (1 pack = total 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. 14, the A-CONT pack has a 14-byte pack header, a 24-byte system header, a 1003-byte ACD (audio character display) packet, and a 1007-byte ASD (audio search data). ) Consists of packets. The ACD packet includes a 6-byte packet header, a 1-byte substream ID, 636-byte ACD (audio character display) information as shown in detail in FIG. 15, and a 360-byte reserved area. The ASD packet 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. 15, 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 space “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. 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 title. It consists of set search information, 8-byte title search information, 404-byte track search information, 408-byte index search information, 80-byte highlight search information, and a 52-byte reserved area.

  The 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. Further, by arranging the TOC information in the audio manager information (AMGI) and the audio title set information (ATSI), the necessary TOC information is stored in the memory in the playback device, and 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 three levels of title, song, and index are possible.
(2) Finding of GOF (audio frame) units, time search, and random access are possible.
(3) The title, song, 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 song, 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 the A-CONT pack and the CONT pack, but may be configured not to include the V pack and the CONT pack as shown in FIG. In this case, the video signal is not recorded, but the recording capacity of the audio signal is increased, the disc size can be reduced, and the playback function can be simplified, so that playback for portable use is possible. What is suitable for the device can be provided.

19 is an explanatory diagram showing in detail the format of audio manager information (AMGI) in the second embodiment, FIG. 20 is an explanatory diagram showing in detail the TOC information in FIG. 19, and FIG. 21 is an audio title set information in the third embodiment. It is explanatory drawing which shows the format of (ATSI) in detail.
Next, a second embodiment using TOC (Table Of Contents) information will be described. As shown in FIG. 19, a TOC as shown in detail in FIG. 20 is added and recorded in an empty area of AMGI (Audio Manager Information), and the playback device accesses this TOC information to find the beginning of the song. Do. FIG. 20 shows, as an example, general TOC information recorded in the lead-in area of a CD, and the same information is recorded three times. In addition, when recording on the DVD audio disk 1 of the present invention, it may be repeated in this way, or may not be repeated.

  Here, in the TOC information used in the CD, when the point = 00 to 99, the absolute time when each movement indicated by the number starts is expressed in minutes (PMIN), seconds (PSEC), and frames (PFRAME). The When point = A0, PMIN indicates the first movement and PSEC = PFRAME = 0. When point = A1, PMIN indicates the last movement and PSEC = PFRAME = 0. When point = A2, the absolute time when the lead-out area starts is expressed in minutes (PMIN), seconds (PSEC), and frames (PFRAME). Therefore, the TOC information shown in FIG. 20 indicates that six songs (or six movements) are recorded on the DVD audio disk 1 (points = 01 to 06). The TOC information may be recorded in an empty area of ATSI (Audio Title Set Information) as shown in FIG. 21 instead of AMGI, and in the ACD packet of the A-CONT pack shown in FIG. May be recorded in the reserved area (360 bytes).

  Next, a fourth embodiment will be described. FIG. 22 shows the format of the fourth embodiment of the DVD audio disk applied to the present invention, which does not include the VTS as shown in FIGS. 24 to 26, and is composed only of ATS. This ATS (directory) is composed of SAMG (Structure of Simple Audio Manager), audio manager (AMG) shown in FIG. 1B, audio and video manager menu (AMGM), and AMGI in AMG. Consists of managed ATS <1> and ATS <2>, and ATS <1> and ATS <2> do not include an A-CONT pack, but include an A pack and an RTI pack, as shown in FIG. Has been. Also, this RTI pack is not arranged much with respect to the A pack, and about one pack is arranged every 0.5 seconds. Further, the still image pack is arranged at a predetermined position. SAMG is an area where the SAPP table (TOC) for cueing ATS <1> and ATS <2> is repeatedly described eight times. This area can be defined as one independent file.

Here, for reference, FIG. 24 shows the format of a DVD-Van (video + audio navigation) disc, which is roughly a DVD-video data video title set (VTS) and audio navigation (navigation). The data is composed of ANV title set (ANV-TS). More specifically, the VTS has the same configuration as that of the DVD video disk shown in FIG. 1A and FIG. 25 described later. On the other hand, the ANV-TS has an audio manager (AMG) shown in FIG. And ATS <1> and ATS <2> managed by the AMGI in the AMG in pairs with the VTS <1> and VTS <2>.
Further, as shown in FIGS. 25 and 1A, the format of the DVD video disk does not include ATS and ANV-TS, and is configured only by VTS.

  FIG. 26 shows the format of a DVD-Avd (audio + AV data) disc. This format is roughly based on a video title set (VTS) as DVD-video data and an audio title set (ATS) as DVD-audio data. It is configured. More specifically, the VTS includes a video manager (VMG) shown in FIG. 1A, a video and audio video manager menu (VMGM), and a VTS <1> managed by the VMGI in the VMG. .

  On the other hand, ATS makes a pair with SMG, audio manager (AMG) shown in FIG. 1B, audio manager menu (AMGM) of video and audio, and audio data in VTS <1> on the VTS side, In addition, the ATS <1> managed by the AMGI in the AMG and the ATS <2> managed by the AMGI in the AMG are not paired with the VTS side. Further, as shown in FIG. 23, this ATS <2> does not include an A-CONT pack, and is composed of an A pack and an RTI pack.

FIG. 27 shows an audio-only title audio object attribute (AOTT-AOB-ATR) recorded on the disc as attribute data indicating the content of the audio data of the disc of the fourth embodiment. This attribute data is composed of 8 bytes (64 bits b63 to b0), and will be described in detail from the MSB side in order: • 4-bit (b63 to b60) audio encoding mode;
-1 bit (b59) downmix (D-M) mode;
A 3-bit (b58-b56) multi-channel structure;
4 bit (b55 to b52) channel group 1 quantization bit number Q1, 4 bit (b51 to b48) channel group 2 quantization bit number Q2, and 4 bit (b47 to b44) channel A sampling frequency fs1 of group 1;
A sampling frequency fs2 of channel group 2 of 4 bits (b43 to b40);
A 3-bit (b39 to b37) reserved area;
-5-bit (b36-b32) channel assignments;
-It is composed of a reserved area of the remaining 32 bits (b31 to b0). The remaining 32 bits (b31 to b0) are used for attribute data of each channel.

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

(4) Quantization bit number Q of channel group 1 (b55 to b52)
0000b: 16 bits 0001b: 20 bits 0010b: 24 bits Others: Reserved (5) Number of quantization bits Q of channel group 2 (b51 to b48)
“0000b” when the number of quantization bits Q of channel group 1 is “0000b”
When the quantization bit number Q of the channel group 1 is “0001b”, “0000b” or “0001b”
When the quantization bit number Q of the channel group 1 is “0010b”, “0000b”, “0001b” or “0010b”
However, 0000b: 16 bits
0001b: 20 bits
0010b: 24 bits
Other: Hold

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

(7) Sampling frequency fs2 (b43 to b40) of channel group 2
“0000b” when the sampling frequency fs1 of channel group 1 is “0000b”
When the sampling frequency fs1 of the channel group 1 is “0001b”, “0000b” or “0001b”
When the sampling frequency fs1 of the channel group 1 is “0010b”, “0000b”, “0001b” or “0010b”
“1000b” when the sampling frequency fs1 of channel group 1 is “1000b”
When the sampling frequency fs1 of the channel group 1 is “1001b”, “1000b” or “1001b”
When the sampling frequency fs1 of the channel group 1 is “1010b”, “1000b”, “1001b”, or “1010b”

In the disk of the fourth embodiment, the linear PCM mode is used. As shown in FIG. 28, the linear PCM private header includes an 8-bit substream ID,
A 4-bit reserved area;
A 4-bit ISRC number and
・ 8-bit ISRC data,
-8-bit private header length,
A 16-bit first access unit pointer;
1-bit audio emphasis flag F1,
It is composed of a 1-bit audio emphasis flag F2, etc.

  29 and 30 show an encoding apparatus. FIG. 29 is a block diagram showing an embodiment of an audio signal encoding apparatus applied to the present invention, and FIG. 30 is a block diagram showing in detail the signal processing circuit of FIG.

In FIG. 29, the analog audio signal A is sampled by the A / D converter 31 at a sufficiently high sampling frequency (sampling period Δt), for example, 192 kHz, and converted into a 24-bit high-resolution PCM signal, for example, to a high-resolution curve α. Corresponding data string 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 shown in detail in FIG. 30, and then applied to the DVD audio formatting unit 34.

The configuration of the signal processing circuit 32 will be described in detail with reference to FIG. First, a low-resolution curve band-limited from a data string (xbi, x2i-1, xai, x2i) corresponding to a high-resolution curve α by a low-pass filter 36 that passes a half band, for example, an FIR filter. Data sequence corresponding to β xc1, *, *, *, xc2, *, *, *, xc3, *, *, *, ..., xci, *, *, *, ...
Next, by thinning out the data “*” of the data string by the thinning circuit 37, the data string xc1, xc2, xc3,..., Xci,.
Is generated. Here, the data string xci is a data string in which the digital data A / D converted by the A / D converter 31 is band-limited and the sampling frequency is reduced to ¼.

Further, the data string xb1, xa1, xb2, xa2,..., Xbi, xai,...
Is generated.

Then, based on these data strings xci, xbi, xai, an adder 39 acting as a difference calculator makes a difference xbi−xci = Δ1i
xai-xci = Δ2i
Is calculated. Here, the difference data Δ1i, Δ2i is, for example, 24 bits or less, and the number of bits may be fixed or variable.

  The allocation circuit 40 packs the data string xci and the difference data Δ1i and Δ2i into user data (see FIG. 13) (1 packet = 2403 bytes), and outputs the user data to the DVD formatting unit 34.

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

  Next, a DVD-audio disk of the fifth embodiment will be described with reference to FIGS. First, as shown in FIG. 31A, the data structure of the fifth embodiment is roughly composed of SMG, AMG (audio manager), SPS (still picture set), and a plurality of ATS (audio title set). ). Note that SPS (still picture set) is also referred to as ASVS (audio still video set) in the following description in order to avoid confusion with sub-pictures (SP).

ATS is: ATSI (ATS information) in order from the top,
An audio-only audio object set (AOTT-AOBS) shown in detail in FIGS. 32 to 37 and a backup ATSI. ATSI is composed of ATSI-MAT (ATSI management table) shown in detail in FIGS. 39 to 44 and ATS-PGCIT (ATS program chain information table) shown in detail in FIGS. Yes.

  As shown in detail in FIG. 32, the AOTT-AOBS is composed of a plurality of audio objects for audio only titles (AOTT-AOB). Each of AOTT-AOB is composed of a plurality of programs (PG), and each of the programs is composed of a plurality of cells (ATS-C).

  The AOTT-AOB includes only audio data as shown in detail in FIG. 32 (1), and includes audio data and real time information data (RTI data) as shown in detail in FIG. 32 (2). It is composed of two types of AOTT-AOB. One or more types of AOTT-AOB are arranged in one disc or one song.

  Each program of the first AOTT-AOB including only audio data is composed of a plurality of audio cells (ATS-C), and this audio cell is composed of only a plurality of audio packs. Each program of the second AOTT-AOB including the audio data and the RTI data is composed of a plurality of audio cells (ATS-C), and the audio cell includes the RTI pack arranged at the second pack position and other packs. The audio pack is arranged at the position.

  The A-pack of linear PCM is composed of 2048 bytes or less, and the breakdown is composed of a 14-byte pack header and an A packet as shown in FIG. The A packet is composed of a packet header of 17, 9 or 14 bytes, a private header shown in detail in FIG. 34, and audio PCM data of 1 to 2011 bytes.

As shown in FIG. 34, the private header is composed of an 8-bit substream ID,
A 3-bit reserved area;
-5-bit UPC / EAN-ISRC (Universal Product Code / European Article Number International Standard Recording Code) number,
-8-bit UPC / EAN-ISRC data;
-8-bit private header length,
A 16-bit first access unit pointer;
It is composed of 8 bytes of audio data information (ADI) and 0 to 8 bytes of stuffing bytes.

ADI has a 1-bit audio emphasis flag,
A 1-bit reserved area;
-1-bit downmix mode,
・ Effectiveness of 1-bit downmix code,
・ 4-bit downmix code,
A quantization word length “1” of a 4-bit group “1”;
A quantization word length “2” of a 4-bit group “2”;
A 4-bit group “1” audio sampling frequency fs1,
A 4-bit group “2” audio sampling frequency fs2,
A 4-bit reserved area;
・ 4-bit multi-channel type,
3 bit channel group “2” bit shift data (see FIG. 36), 5 bit channel allocation information (see FIG. 42),
• 8-bit dynamic range control information • 8 × 2 bits reserved area.

In the 8-bit (b7 to b0) UPC / EAN-ISRC data area, different data is arranged according to the UPC / EAN-ISRC number as shown in FIG. That is,
(1) When UPC / EAN-ISRC number = 1 Upper 2 bits b7, b6: Reserved Lower 6 bits b5-b0: Country code (ISRC # 1)
(2) When UPC / EAN-ISRC number = 2 Upper 2 bits b7 and b6: Reserved Lower 6 bits b5 to b0: Country code (ISRC # 2)
(3) When UPC / EAN-ISRC number = 3 Upper 2 bits b7 and b6: Reserved Lower 6 bits b5 to b0: Copyright holder code (ISRC # 3)
(4) When UPC / EAN-ISRC number = 4 Upper 2 bits b7, b6: Reserved Lower 6 bits b5-b0: Copyright holder code (ISRC # 4)
(5) When UPC / EAN-ISRC number = 5 Upper 2 bits b7, b6: Reserved Lower 6 bits b5-b0: Copyright holder code (ISRC # 5)
(6) When UPC / EAN-ISRC number = 6 Upper 4 bits b7 to b4: Reserved Lower 4 bits b3 to b0: Recording year (ISRC # 6)
(7) When UPC / EAN-ISRC number = 7 Upper 4 bits b7 to b4: Reserved Lower 4 bits b3 to b0: Recording year (ISRC # 7)

In the area of linear PCM data, which is actual data in the A pack, bits of data of each channel of the group “2” are arranged to be reduced in order to improve the S / N ratio and reduce the bits. FIG. 36A shows PCM data of 6 channels (group “1” = Ch1 to Ch3, group “2” = Ch4 to Ch6) as an example, and the level range is MAX = 0 dB to MIN = −144 dB (24 bits). The values of each channel Ch are as follows.
Lmax2> Lmax1 = Lmax3>Lmax4>Lmax5> Lmax6
Then, with the word lengths of Ch1 to Ch3 of the group “1” being left as they are, the value of Ch2 is the largest in this example, so the levels of Ch4 to Ch6 of the group “2” are upshifted by (0−Lmax2) dB. Thus, 0 to 4 bits on the LSB side are reduced. In the example shown in FIG. 36, each level of Ch4 to Ch6 is upshifted by the maximum number of bits = 4 and reduced to 20 bits.

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

The private header of the RTI packet is
A 1-byte substream ID,
-2-byte UPC / EAN-ISRC number and data (in the figure, these are simply expressed as ISRC),
-1 byte private header length,
-1-byte RTI information ID,
-It consists of 0 to 7 bytes of stuffing bytes.
The UPC / EAN-ISRC number and data are the UPC / EAN-ISRC number and data related to the copyright of the still picture stored in the SPCT pack.

  Incidentally, an SPCT pack is arranged in the still picture set (audio still video set) shown in FIG. 31, and this SPCT pack is composed of a 14-byte pack header and an SPCT packet, as shown in detail in FIG. The SPCT packet is composed of a packet header of 22 or 19 or 9 bytes and SPCT data of 2025 bytes or less. Here, one still image is compressed by the MPEG1 or MPEG2 system, is composed of an I picture and an intra-coded picture, is divided within one picture cell, and is arranged as SPCT data of an SPCT pack. Similarly, the UPC / EAN-ISRC number and data related to the still picture copyright may be included in the packet header of the SPCT pack as described in the RTI pack.

The ATSI-MAT shown in FIG. 31A is composed of 2048 bytes (relative byte positions RBP0 to 2047) as shown in detail in FIG. 39, and is an ATS identifier of 12 bytes (RBP0 to 11) in order from the top. (ATS-ID),
4 bytes (RBP 12-15) ATS end address (ATS-EA),
A 12-byte (RBP 16-27) reserved area;
-4-byte (RBP28-31) ATSI end address (ATSI-EA),
・ Version number (VERN) of 2 bytes (RBP 32-33),
94 bytes (RBP 34 to 127) reserved area,
-4 bytes (RBP128-131) ATSI-MAT end address;-60 bytes (RBP132-191) reserved area;
4 bytes (RBP 192 to 195) AOTT VTS start address,
・ Start address of AOBS for AOTT of 4 bytes (RBP196-199) or VOBS for AOTT,
A reserved area of 4 bytes (RBP 200 to 203);
4 bytes (RBP 204 to 207) of ATS-PGCIT start address,
-48 bytes (RBP 208-255) reserved area,
-AOB attribute for AOTT (AOTT-AOB-ATR) of 128 (16x8) bytes (RBP 256-383) or an audio stream attribute for AOTT (AOTT-VOB-AST-ATR);
A coefficient (ATS-DM-COEFT # 0 to # 15) of 288 (18 × 8) bytes (RBP 384 to 661) for downmixing multi-channel audio data to two channels;
A 32-byte (RBP 672-703) reserved area;
Two-byte (RBP 704 to 705) attributes of still picture data (ATS-SPCT-ATR) in AOBS for AOTT,
-It is composed of a reserved area of 1342 bytes (RBP 706 to 2047).

In the area of 128 (16 × 8) bytes (RBPs 256 to 383), when this ATS has an AOTS for AOTT, AOTT-AOB-ATR shown in detail in FIG. 40 is described. The AOTT-AOB-ATR (b127 to b0) is an audio encoding mode of 8 bits (b127 to b120) in order from the MSB side,
An 8-bit (b119 to b112) reserved area;
A quantization bit number Q1 of a channel group “1” of 4 bits (b111 to b108);
A quantization bit number Q2 of a channel group “2” of 4 bits (b107 to b104);
A sampling frequency fs1 of a channel group “1” of 4 bits (b103 to b100);
A sampling frequency fs2 of a 4-bit (b99 to b96) channel group “2”;
3 bit (b95 to b93) multi-channel structure type;
-Channel assignment of 5 bits (b92 to b88);
-It is composed of a reserved area of 8 bits x 11 (b87 to b0).

On the other hand, when this ATS does not have AOTS for AOTT, AOTT-VOB-AST-ATR shown in FIG. 41 is described. The AOTT-VOB-AST-ATR (b127 to b0) is, in order from the MSB side, an audio encoding mode of 8 bits (b127 to b120),
An 8-bit (b119 to b112) reserved area;
A 4-bit (b111 to b108) quantization bit number Q;
A 4-bit (b107 to b104) reserved area;
A sampling frequency fs of 4 bits (b103 to b100),
A 4-bit (b99 to b96) reserved area;
3 bit (b95 to b93) multi-channel structure type;
-Channel assignment of 5 bits (b92 to b88);
3 bit (b87 to b85) decoding audio stream number;
A 5-bit (b84 to b80) reserved area;
A 2-bit (b79, b78) MPEG audio DRC;
A 2-bit (b77, b76) reserved area;
A 4-bit (b75-b72) number of compressed audio channels;
-It is composed of a reserved area of 8 bits x 9 (b71 to b0).

The above data is shown in detail below. However, the number of quantization bits, the sampling frequency, and the multichannel type are the same as those in FIG.
(1) Audio encoding mode (b127 to b120)
00000000b: Linear PCM mode 00000001b: Reserved for compressed audio (Dolby Digital) 00000010b: Reserved for compressed audio (without MPEG2 extension) 00000011b: Reserved for compressed audio (with MPEG2 extension) 00000100b: Reserved for compressed audio (DTS) 00000101b: Reserved for compressed audio (SDDS) Other: Reserved for other encoding modes

(8) Channel assignment (b92 to b88)
FIG. 42 shows channel assignment information of groups “1” and “2” from 1 channel (monaural) to 6 channels. Incidentally, the symbols shown in the figure will be described below.
C (mono): Mono L, R: 2-channel stereo Lf: Multi-channel left front Rf: Multi-channel right front C: Multi-channel center LFE: Multi-channel Low Frequency Effect
S: Multi-channel surround Ls: Multi-channel left surround Rs: Multi-channel right surround

(9) “0” or “1” of the number of decoding audio streams (b87 to b85)
(10) DRC for MPEG audio (b79, b78)
00b: There is no DRC data in the MPEG audio stream.
01b: DRC data exists in the MPEG audio stream.

(11) Number of compressed audio channels (b75 to b72)
When the audio encoding mode is linear PCM audio, “1111b” 0000b: 1ch (mono)
0001b: 2ch (stereo)
0010b: 3ch
0011b: 4ch
0100b: 5ch
0101b: 6ch
0110b: 7ch
0111b: 8ch
Other: Hold

  In an area of 288 (18 × 16) bytes (RBP 384 to 671) shown in FIG. 39, table numbers “0” to “15” as shown in FIG. 43 for downmixing multi-channel audio data to two channels. Each downmix coefficient (ATS-DM-COEFT # 0 to # 15) is described in 18 bits.

The area of 2 bytes (RBPs 704 and 705) shown in FIG. 39 describes the still picture data attribute (ATS-SPCT-ATR) in AOTS for AOTT in order from the MSB side as shown in detail in FIG. 2 bit (b15, b14) video compression mode;
A 2-bit (b13, b12) TV system;
An aspect ratio of 2 bits (b11, b10);
-2-bit (b9, b8) display mode;
A 2-bit (b7, b6) reserved area;
-The resolution of the 3-bit (b5-b3) source picture;
-It is composed of a reserved area of 3 bits (b2 to b0).

The contents of the ATS-SPCT-ATR are shown in detail below.
(1) Video compression mode (b15, b14)
00b: MPEG1 compatible 01b: MPEG2 compatible Other: Reserved (2) TV system (b13, b12)
00b: 525/60
01b: 625/60
Other: Reserved (3) Aspect ratio (b11, b10)
00b: 4: 3
11b: 16: 9
Other: Hold (4) Display mode (b9, b8)
00b: Hold 01b: Hold 10b: Only letterbox is allowed 11b: Not described.
(5) Source picture resolution (b5 to b3)
000b: 720 × 480 (525/60 system)
720x576 (625/60 system)
Other: Hold

The ATS-PGCIT (ATS program chain information table) shown in FIG. 31A is in order from the beginning as shown in detail in FIG. 45. Audio title set PGCI table information (ATS-) shown in detail in FIG. PGCITI),
47 and FIG. 48, n audio title sets PGCI search pointers (ATS-PGCI-SRP # 1 to #n) and a plurality of audio title sets PGCI shown in detail in FIG. .

The ATS-PGCITI is composed of 8 bytes as shown in detail in FIG. 46, in order from the top, the number of 2-byte ATS-PGCI-SRP # 1 to #n,
A 2-byte reserved area;
-Consists of a 4-byte ATS-PGCIT end address. Each of the ATS-PGCI-SRPs # 1 to #n is composed of 8 bytes as shown in detail in FIG. 47, and in order from the top, the 4-byte ATS-PGC category (ATS-PGC-CAT) shown in detail in FIG. ), And 4-byte ATS-PGCI end address.

The 4-byte (b31 to b0) ATS-PGC category is, as shown in detail in FIG.
7-bit (b30 to b24) ATS audio title number (ATS-TTN);
-2 bit (b23, b22) block mode;
-2 bit (b21, b20) block type;
The number of 4-bit (b19 to b16) audio channels;
An 8-bit (b15-b8) audio encoding mode;
-It is composed of a reserved area of 8 bits (b7 to b0).

The contents of the category (ATS-PGC-CAT) are shown in detail below.
(1) Entry type (b31)
0b: Not an entry PGC 1b: Entry PGC
(2) Number of ATS audio titles (b30 to b24)
The number of audio titles of this ATS is described in the range of “1” to “99”.
(3) Block mode (b23, b22)
00b: Not ATS-PGC in ATS-PGC block 01b: First ATS-PGC in ATS-PGC block
10b: reserved 11b: last ATS-PGC of ATS-PGC block
(4) Block type (b21, b20)
00b: Not part of this block 01b: Difference block only for audio coding mode 10b: Difference block only for audio channel 11b: Difference block for both audio coding mode and audio channel (5) Number of audio channels (b19- b16)
0000b: 2 channels or less 0001b: Over 2 channels

Each of the audio title sets PGCI (ATS-PGCI) shown in FIG. 45 is in order from the beginning as shown in detail in FIG. 49. ATS-PGC general information (ATS-PGC-GI) shown in detail in FIGS. )When,
The ATS program information table (ATS-PGIT) shown in detail in FIGS. 52 to 56 and the ATS cell playback information table (ATS-C-PBIT) shown in details in FIGS. Yes.

As shown in detail in FIG. 50, ATS-PGC-GI is composed of 16 bytes (RBP 0 to 15), and in order from the top • 4 bytes (RBP 0 to 3) of ATS-PGC content (ATS-PGC-) shown in detail in FIG. CNT)
4 bytes (RBP4-7) ATS-PGC playback time (ATS-PGC-PB-TM),
A 2-byte (RBP8, 9) reserved area;
A 2-byte (RBP10, 11) ATS-PGIT start address;
A 2-byte (RBP 12, 13) ATS-C-PBIT start address;
-It consists of a reserved area of 2 bytes (RBP14, 15).

The 4-byte (b31 to b0) ATS-PGC contents are, as shown in detail in FIG.
It is composed of the number of programs of 7 bits (b14 to b8) and the number of cells of 8 bits (b7 to b0). The number of programs is in the range of “1” to “99”, and the number of cells is in the range of “1” to “255”.

The ATS program information table (ATS-PGIT) shown in FIG. 49 is composed of n ATS program information (ATS-PGI) # 1 to #n as shown in detail in FIG. Each of ATS-PGI # 1 to #n is composed of 20 bytes (RBP0 to 19) as shown in detail in FIG. 53, and in order from the beginning. • 4 bytes (RBP0 to 3) of ATS-PG content shown in detail in FIG. (ATS-PG-CNT),
1 byte (RBP4) ATS-PG entry cell number,
-1 byte (RBP5) reserved area;
The start presentation time (FAC-S-PTM) of the first audio cell of the 4-byte (RBP 6-9) ATS-PG;
4 bytes (RBP 10-13) of ATS-PG playback time,
4 bytes (RBP 14-17) ATS-PG pause time,
1 byte (RBP18) reserved area (for copyright management data CMI),
-It is composed of a 1-byte (RBP19) reserved area.

As shown in detail in FIG. 54, the ATS-PG content of the above 2 bytes (b31 to 0) is: 1 bit (b31) in order from the beginning, the relationship between the previous and current PG (R / A),
1 bit (b30) STC discontinuity flag (STC-F),
・ The number of attributes (ATRN) of 3 bits (b29 to b27),
3 bit (b26 to b24) channel group (ChGr) “2” bit shift data;
A 2-bit (b23, b22) reserved area;
1-bit (b21) downmix mode (D-M),
・ Effectiveness of 1-bit (b20) downmix coefficient (shown *),
A 4-bit (b19 to b16) downmix coefficient table number (DM-COEFTN);
Each is composed of RTI flags F15 to F0 of 1 bit and 16 bits (b15 to b0) in total.

The ATS cell playback information table (ATS-C-PBIT) shown in FIG. 49 includes n ATS cell playback information (ATS-C-PBI) # 1 to 1 as shown in detail in FIG. #N. Each of the ATS-C-PBIs # 1 to #n is composed of 12 bytes (RBP0 to 11) as shown in detail in FIG. 56, and from the top of the ATS-C index number of 1 byte (RBP0),
-1-byte (RBP1) ATS-C type (ATS-C-TY) shown in detail in FIG.
A 2-byte (RBP2, 3) reserved area;
4 bytes (RBP 4-7) ATS-C start address,
• It is composed of an ATS-C end address of 4 bytes (RBP 8 to 11).

The 1-byte (b7 to b0) ATS-C type has two bits (b7, b6) of ATS cell elements (ATS-C-COMP) in order from the top as shown in detail in FIG.
It is composed of a 2-bit (b5, b4) reserved area and a 4-bit (b3 to b0) ATS cell application (ATS-C-Usage).

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

  Next, an encoding apparatus according to a fifth embodiment will be described. 58 and 59 show the configuration and processing of the encoding apparatus, respectively. The analog audio signal A is sampled by the A / D converter 31 at a sufficiently high sampling frequency (sampling period Δt), for example, 192 kHz, and converted to a 24-bit high resolution PCM signal, for example. In the subsequent bit shift / signal processing circuit 32, when compression is not performed, the PCM data converted by the A / D converter 31 is applied to the DVD formatting unit 34 as it is. On the other hand, when compression is performed, the PCM data converted by the A / D converter 31 is compressed by the bit shift / signal processing circuit 32 according to the encoding mode, and then applied to the DVD formatting unit 34. (Steps S5 and S6). In the bit shift / signal processing circuit 32, each channel of the group “2” is bit-shifted.

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

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

  FIG. 60 shows a specific configuration of the decoding apparatus of the fifth embodiment, and FIG. 61 functionally shows the configuration of FIG. FIG. 62 shows the processing. 60 and 61, first, when a song selection, playback, fast forward, and stop operation is performed by the operation unit 18 or the remote control device 19, the control unit 23 controls the drive device 2 and the playback device 17 in accordance with the operation. During reproduction, the pit data recorded on the DVD audio disk 1 is read by the drive device 2 and then EFM demodulated.

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

  The A and RTI pack detection unit 9 detects the A pack and RTI pack in the reproduction data, sets control parameters in the parameter unit 14, and sequentially writes the A pack and RTI pack in the A and RTI pack buffer 10. User data (audio signal, real-time information) in the A pack and the RTI pack written in the A and RTI pack buffer 10 is extracted by the buffer extraction unit 11 in the order of the pack and in the order of the output time. The audio signal is output as an analog audio signal via the PCM conversion and bit shift / signal processing unit 12, the D / A conversion unit 13, and the audio output terminal 16. The real-time information is sent to the display signal generation unit 20 to generate a display signal. This display signal is output via the display signal output terminal 22 or output to the built-in character display unit 21.

  The processing of this decoding apparatus will be described with reference to FIG. First, the recorded data is read by accessing the disk 1 (step S20), and then in each of the separation steps S21 to S29, a video signal, a still image signal, an audio signal, copyright information and real-time information (RTI), and characters Information and disc identifier (EX) are separated. Next, in each decoding step S22 to S30, each separated data is decoded and then reproduced synchronously (steps S31 and S32).

Here, there are the following three processes for reproducing the still image SP.
1) When the still image SP is obtained, the reproduction of the audio signal A is interrupted and muted.
2) When the still image SP is obtained, it is reproduced together with the audio signal A based on the time control signal. This is called a slide show.
3) When the still image SP is obtained, the page turning reproduction is performed based on the page turning command instructed by the user. At this time, the audio signal A is reproduced as it is. This is called browserable.

  When it is necessary to synchronize the still image with the audio, the time control signal for real-time synchronization is added under the still picture control information table (SPCIT) provided in addition to the ATSI in FIG. Place in time control data information (SPCIT-TCDI).

  Further, still picture page control command information (SPPI) containing a page turning command is placed under SPCIT. Thus, SPCIT is composed of general information SPCIT general information (SPCIT-GI), time control data information (SPCIT-TCDI), and still picture page control command information (SPPI). .

  Here, the side information for page control of the still picture can be included in the still picture data of the SPCT pack of FIG. The page control data defined by the side information is interpreted and referred to with reference to SPPI. If there is not enough capacity to fit in the still picture data, it is acceptable to include side information for page control of the above still picture in the RTI data of the RTI pack.

  Next, an embodiment in which the digital audio signal formatted as described above is transmitted via a communication line will be described. First, the packing apparatus on the transmission side will be described with reference to FIGS. As shown in FIG. 63, the packing apparatus includes a packing processing unit 30, a buffer memory 30B, a control circuit 29, an operation unit 27, and a display 28. 64 to 67, when the video signal V, the still image signal SP, the audio signal A, the real-time information RTI, and the disc identifier (EX) are input, in step S100, as shown in detail in FIG. A pack is generated (step S101), then a video pack is generated (step S102), then a still image pack is generated (step S103), and then real-time text is generated (step S104).

  Next, the cell (ATS-C) is managed (step S200), then the PTT (part of title) is managed (step S300), then the title (AOTT-AOB) is managed (step S400), and then the title set (AOTT) -Manage AOBS (step S500) In the following step S600, in order to generate an ATS, a title set is generated as shown in detail in Fig. 66 (step S601), and then a menu is generated (step S602). -The category of PGCI is described (step S603), and then ATS-PGCIT is generated by generating PGCI including PG content including bit shift and generating PGCI (step S604). By creating A Generating a SI (step S605). Then generate AMG (step S700), finally to produce a TOC (step S800).

  Next, when transmitting the digital audio signal formatted as described above via a communication line, as shown in FIG. 67, the transmission data stored in the transmission buffer is divided into predetermined lengths and packets are transmitted. Then, a header including the destination address is added to the beginning of the packet (step S42), and this is then output on the network (step S43).

  Next, the data receiving side will be described with reference to FIGS. As shown in FIG. 68, the unpacking device on the data receiving side includes an unpacking processing unit 60, a buffer memory 60B, a parameter memory 56, a control circuit 59, an operation unit 57, and a display 58. First, as shown in FIG. 69, the header is removed from the packet received from the network (step S51), then the received data is restored (step S52), and then transferred to the memory (step S53).

  Next, as shown in FIGS. 70 to 72, first, AMG is decoded to detect ATS (step S1100), and in subsequent step S1200, in order to decode the ATSI of the target ATS, as shown in detail in FIG. ATS-PGCI category is decoded (step S1201), PGIT composed of PG content including bit shift is decoded (step S1202), MAT attributes and coefficients are then decoded (step S1203), and then these are decoded. Each parameter is set in the parameter memory 56 (step S1204).

  Next, when playback is started, the pack is identified (step S1300), and in the subsequent step S1400, the audio pack is decoded as shown in detail in FIG. 72 (step S1401) to decode the pack, and then the video pack is decoded. Then, the still picture pack is decoded (step S1403), and then the real-time text is decoded (step S1404). Then, an audio signal, a video signal, a still image signal, and a real-time text signal decoded from each pack are output (step S1500), and the processing from step S1300 to step S1500 is repeated during reproduction.

  Next, the SPS (Still Picture Set), that is, ASVS (Audio Still Video Set) shown in FIG. 31 will be described in detail with reference to FIGS. Here, the still picture object set (SPOBS) shown below is also referred to as an audio still video object set (ASVOBS) in order to avoid confusion with the sub-picture (SP). As shown in FIG. 73, ASVS (Audio Still Video Set) includes ASVS Information (ASVSI) shown in detail in FIGS. 74 and 75, and Audio Still Video Object Set (ASVOBS) shown in detail in FIG. And backup ASVSI.

  The ASVS information (ASVSI) includes audio still video unit information (ASVUI) shown in detail in FIG. 74, an ASV address map (ASV-ADMAP) shown in FIG. 75, and a stuffing area (00h). .

As shown in FIG. 74, the ASVUI (total 888 bytes) is a 12-byte ASVS-ID,
The number of 2-byte ASVUs;
-A 2-byte reserved area,
A 4-byte ASVOBS start address,
A 4-byte ASVOBS end address;
2 bytes x 4 ASVU attributes # 0 to # 3,
-4 bytes x 16 ASVOBS sub-picture palettes # 0 to # 15;
-It consists of 8 bytes x 99 ASVU # 1 to # 99 general information.

  The ASV address map (ASV-ADMAP) shown in FIG. 73 is composed of m (≦ 99) ASVU # 1 to #m as shown in detail in FIG. 75, and each of ASVU # 1 to #m is ASVU #. 1 to # 99 start addresses.

Next, the audio still video object set (ASVOBS) shown in FIG. 73 will be described. An audio still video object (ASVOB) is presentation data of one audio still video (ASV), which is highlight information (HLT) information data for buttons and sub-picture (SP) data for buttons as well. And still picture (SPCT) data. However,
Only one still picture (SPCT) data is included in one ASVOB.
Only one highlight (HLT) information data can be included in one ASVOB. Highlight information is used to operate still picture buttons.
One ASVOB can contain 1 to 3 sub-picture (SP) data according to the still picture mode. The SP data is used to display a still picture button.

  The audio still video object set (ASVOBS) shown in FIG. 73 is an assembly of the above ASVOBs as shown in FIG. As shown in FIG. 76 (a), ASVOB does not function as an HLT pack as an empty pack that does not include highlight information, although a highlight (HLT) pack is arranged at the head. As shown in FIG. 76 (b), there are two types, one including a pack and one including a highlight (HLT) pack, a sub-picture (SP) pack, and a still picture (SPCT) pack.

  As shown in FIG. 77A, the highlight (HLT) pack is composed of a 14-byte pack header, a system header, and a 2013-byte highlight information packet. The highlight information packet includes a 6-byte packet header, a 1-byte substream ID, and 694-byte highlight information (ASV-HLI). The system header consists of a 4-byte system start code, 2-byte header length, 3-byte rate bound, 2-byte audio bound, 1-byte limit flag, and 9-byte stream ID area. ing.

  As shown in FIG. 78, the highlight information (ASV-HLI) includes ASV highlight general information (22 bytes), an ASV button color information table (8 bytes × 3), and an ASV button information table (18 bytes × 36). Consists of The ASV button information table is composed of ASV button information # 1 to #n, and each ASV button information #i includes an ASV button command that is a picture control command. This ASV button command describes a navigation command when the button shown in FIG. 81 is operated.

  On the other hand, the SPCT pack and the SP pack are composed of a 14-byte pack header and a 2025-byte still picture packet or sub-picture packet, as shown in FIG. 77 (b), and the pack header includes a 4-byte pack start code and , A 6-byte SCR, a 3-byte program mux rate, and a stuffing length of 9 or 22 bytes.

  As shown in FIG. 79 in detail, the still picture (SPCT) packet includes an SPCT packet header and still picture video data. This SPCT packet header is only for the 9-byte SPCT packet information that is always provided at the beginning, the 5 + 5-byte SPCT packet information that is provided only for the first SPCT packet of a still image, and the first SPCT packet of ASVOB. Contains provided 3-byte SPCT packet information.

  The sub picture (SP) packet includes an SP packet header and sub picture data as shown in detail in FIG. This SP packet header is only for the 9-byte SP packet information that is always provided at the beginning, the 5-byte SP packet information that is provided only for the first SP packet of the SP unit, and the first SP packet of ASVOB. Contains the provided 3-byte SP packet information. Based on such a data structure, on the decoder side, as shown in FIG. 81, the main picture, the sub picture, and the highlight information are combined and displayed.

  Next, a data structure of a modification of the fifth embodiment will be described with reference to FIG. Here, in the data structure shown in FIG. 31B, a still picture control information table (SPCIT) is provided in ATS independently of ATSI-MAT and ATS-PGCIT. In the example, it is provided in the ATS-PGCIT as shown in FIG. In the following description, SPCIT is referred to as ATS-ASV-PBIT (ATS audio still video / playback information table) in order to avoid confusion with the sub-picture (SP).

As shown in detail in FIG. 83, this ATS-ASV-PBIT is additionally provided in the ATS-PBIT shown in FIG. 49, and each ATS of m programs # 1 to #m shown in detail in FIGS. -ASV-Playback information search pointer (ATS-PG-ASV-PBI-SRP # 1 to #m) and n ATS-ASV-PBI # 1 to #n shown in detail in FIGS. 86 to 90 (N ≦ m ≦ 99). As shown in FIG. 84, each of the SRPs # 1 to #m has a 1-byte ASVU number,
1 byte ASV display mode (ASV-DMOD),
A 2-byte ATS-ASV-PBI start address;
-It consists of a 2-byte ATS-ASV-PBI end address.

The ASVU number is a value in the range of “1” to “99”. As shown in detail in FIG. 85, the ASV display mode has a 4-bit (b7 to b4) reserved area,
A 2-bit (b3, b2) display timing mode;
-It consists of a display order mode of 2 bits (b1, b0). The above data is shown in detail below.
(1) Display timing mode 00b: Slide show 01b: Browserable Other: Hold (2) Display order mode 00b: Sequential 01b: Random 11b: Shuffle Other: Hold

Each of ATS-ASV-PBI # 1 to #n includes 10 bytes × k (k ≦ 99) ASV display lists as shown in FIG. FIG. 87 shows an ASV display list when the display timing mode (b3, b2) is a slide show (00b) and the display order mode (b1, b0) is sequential (00b). This list is 8 bits (b79). ~ A72 number of b72),
An 8-bit (b71 to b64) reserved area;
-8-bit (b63 to b56) button number (FOSL-BTNN) that is forcibly selected at the start of ASV,
An 8-bit (b55 to b48) program number that is played back at the start of the ASV;
-8-bit x 4 (b47 to b16) display start timing (31 to 0);
-4-bit (b15 to b12) start effect mode,
A 4-bit (b11 to b8) start effect period;
-4 bit (b7 to b4) end effect mode,
It is composed of a 4-bit (b3 to b0) end effect period.

The contents of the data are shown in detail below.
(1) The display start timing (31 to 0) indicates the display start timing from the start PTS, and represents 31 to 0/90000 (seconds).
(2) Start effect mode (b15 to b12)
0000b: Cut-in 0001b: Fade-in 0010b: Dissolve 0011b: Wipe from top 0100b: Wipe from bottom 0101b: Wipe from left 0110b: Wipe from right 0111b: Wipe diagonal left 1000b: Wipe Diagonal light Other: Hold (3) End effect mode (b7 to b4)
0000b: Cut out 0001b: Fade out Other: (2) Same as start effect mode (b15 to b12)

  FIG. 88 shows an ASV display list when the display timing mode (b3, b2) is slide show (00b) and the display order mode (b1, b0) is random (01b) in the display mode of FIG. Is the same as the list shown in FIG. 87 except that 8 bits (b79 to b72) are reserved. FIG. 89 shows an ASV display list when the display timing mode (b3, b2) is browserable (01b) and the display order mode (b1, b0) is sequential (00b) in the display mode of FIG. The list is the same as the list shown in FIG. 97 except that 8 bits (b55 to b48) are reserved. FIG. 90 shows an ASV display list when the display timing mode (b3, b2) is browserable (01b) and the display order mode (b1, b0) is random (01b) in the display mode of FIG. The list is the same as the list shown in FIG. 87 except that 8 bits (b79 to b72) and 8 bits (b55 to b48) are reserved.

  The encoding device and the decoding device can also be realized by storing the encoding method and the decoding method as a computer program in an IC chip such as a ROM and operating a CPU (central processing unit) of the computer by this program. The present invention is not only transmitted via a recording medium such as a DVD, but also when transmitted via a communication line such as the Internet or a karaoke communication line and processed by hardware or an application on a PC on the playback side. Can be applied.

It is explanatory drawing which shows 1st Embodiment of the format of DVD-video and the format of DVD-audio applied to this invention. It is explanatory drawing which shows the format of the audio manager (AMG) of FIG. 1 in detail. It is explanatory drawing which shows in detail the format of the audio title set (ATS) of FIG. It is explanatory drawing which shows in detail the format of the audio manager information (AMGI) of FIG. FIG. 5 is an explanatory diagram showing in detail the format of the audio title set attribute table (ATS-ATRT) of FIG. 4. FIG. 6 is an explanatory diagram showing in detail the format of audio title set attribute data (ATS-ATR) in FIG. 5. FIG. 4 is an explanatory diagram showing in detail the format of audio title set information (ATSI) in FIG. 3. FIG. 8 is an explanatory diagram showing in detail the format of the audio title set information management table (ATSI-MAT) of FIG. 7. It is explanatory drawing which shows in detail the audio title set menu audio stream attribute data (ATSM-AST-ATR) of FIG. FIG. 9 is an explanatory diagram showing in detail the format of the audio title set / audio stream / attribute table (ATS-AST-ATRT) of FIG. 8; It is explanatory drawing which shows the attribute data (ATS-AST-ATR) of each audio stream of FIG. 10 in detail. It is explanatory drawing which shows the audio content block unit (ACBU) of FIG. It is explanatory drawing which shows in detail the format of the audio pack and video pack of FIG. FIG. 13 is an explanatory diagram showing in detail the format of the audio control (A-CONT) pack of FIG. 12. FIG. 15 is an explanatory diagram showing in detail the format of the audio character display (ACD) area of FIG. 14. It is explanatory drawing which shows the example displayed by the name space information of FIG. FIG. 15 is an explanatory diagram showing in detail the format of the audio search data (ASD) area of FIG. 14. It is explanatory drawing which shows the modification of the audio content block unit of FIG. It is explanatory drawing which shows in detail the format of the audio manager information (AMGI) in 2nd Embodiment. It is explanatory drawing which shows the TOC information of FIG. 19 in detail. It is explanatory drawing which shows in detail the format of the audio title set information (ATSI) of 3rd Embodiment. It is explanatory drawing which shows the basic format of the DVD-audio disk of 4th Embodiment. It is explanatory drawing which shows the audio data structure of the DVD-audio disk of FIG. It is explanatory drawing which shows the basic format of a DVD-Van disk. It is explanatory drawing which shows the basic format of a DVD video disc. It is explanatory drawing which shows the basic format of a DVD-Avd disc. It is explanatory drawing which shows AOTT-AOB-ATR in the DVD-audio disk of 4th Embodiment. It is explanatory drawing which shows the private header of the linear PCM in the DVD-Avd disc of 4th Embodiment. It is a block diagram which shows one Embodiment of the encoding apparatus of the audio signal applied to this invention. It is a block diagram which shows the signal processing circuit of FIG. 29 in detail. It is explanatory drawing which shows the data structure of 5th Embodiment. FIG. 32 is an explanatory diagram showing in detail the audio object set for audio only title (AOTT-AOBS) in FIG. 31; It is explanatory drawing which shows an example of the audio pack of FIG. 32 in detail. It is explanatory drawing which shows the private header of FIG. 33 in detail. It is explanatory drawing which shows the UPC / EAN-ISRC data of FIG. 34 in detail. It is explanatory drawing which shows the bit shift of the audio data of FIG. FIG. 33 is an explanatory diagram showing the real-time information (RTI) pack in FIG. 32 in detail. It is explanatory drawing which shows a still picture (SPCT) pack in detail. FIG. 32 is an explanatory diagram showing in detail the audio title set information management table (ATSI-MAT) in FIG. 31; FIG. 40 is an explanatory diagram showing in detail the audio object attribute for audio only title (AOTT-AOB-ATR) in FIG. 39; FIG. 40 is an explanatory diagram showing in detail an audio-only title video object audio stream attribute (AOTT-VOB-AST-ATR) in FIG. 39; It is explanatory drawing which shows the channel allocation information of FIG.40 and FIG.41 in detail. It is explanatory drawing which shows in detail the downmix coefficient (ATS-DM-COEFT) of FIG. It is explanatory drawing which shows in detail the still picture data attribute (ATS-SPCT-ATR) of FIG. FIG. 32 is an explanatory diagram showing in detail the audio title set program chain information table (ATS-PGCIT) in FIG. 31; It is explanatory drawing which shows the ATS-PGCIT information (ATS-PGCITI) of FIG. 45 in detail. It is explanatory drawing which shows the ATS-PGCI search pointer (ATS-PGCI-SRP) of FIG. 45 in detail. It is explanatory drawing which shows the ATS-PGC category (ATS-PGCI-CAT) of FIG. 47 in detail. FIG. 46 is an explanatory diagram showing in detail the audio title set program chain information (ATS-PGCI) in FIG. 45. It is explanatory drawing which shows ATS-PGC general information (ATS-PGC-GI) of FIG. 49 in detail. It is explanatory drawing which shows the ATS-PGC content (ATS-PGC-CNT) of FIG. 50 in detail. FIG. 50 is an explanatory diagram showing in detail the ATS program information table (ATS-PGIT) of FIG. 49. FIG. 53 is an explanatory diagram showing in detail the ATS program information (ATS-PGI) of FIG. 52. It is explanatory drawing which shows the ATS-PG content (ATS-PG-CNT) of FIG. 53 in detail. FIG. 53 is an explanatory diagram showing in detail the ATS cell playback information table (ATS-C-PBIT) of FIG. 52; FIG. 56 is an explanatory diagram showing in detail the ATS cell playback information (ATS-C-PBI) in FIG. 55. It is explanatory drawing which shows the ATS-C type (ATS-C-TY) of FIG. 56 in detail. It is a block diagram which shows the encoding apparatus of 5th Embodiment. Fig. 59 is a flowchart showing a process of the encoding device of Fig. 58. It is a block diagram which shows the decoding apparatus of 5th Embodiment. FIG. 61 is a block diagram functionally showing the decoding device of FIG. 60. 62 is a flowchart showing a process of the decoding device in FIGS. 60 and 61. It is a block diagram which shows the packing apparatus in the case of transmitting the audio signal of 5th Embodiment. It is a flowchart which shows the packing process of the packing apparatus of FIG. Fig. 65 is a flowchart showing in detail the pack generation processing of Fig. 64. Fig. 65 is a flowchart showing in detail the ATS generation process of Fig. 64. It is a flowchart which shows the transmission process of the packing apparatus of FIG. It is a block diagram which shows the unpacking apparatus in the case of transmitting the audio signal of 5th Embodiment. 69 is a flowchart showing a reception process of the unpacking apparatus in FIG. 68. 69 is a flowchart showing an unpacking process of the unpacking apparatus in FIG. 68. FIG. 71 is a flowchart showing in detail an ATSI decoding process of FIG. 70. FIG. FIG. 71 is a flowchart showing in detail the pack decoding process of FIG. 70. FIG. FIG. 32 is an explanatory diagram showing in detail the SPS (still picture set), that is, ASVS (audio still video set) in FIG. 31; FIG. 74 is an explanatory diagram illustrating in detail the ASVUI (audio still video unit information) of FIG. 73. FIG. 74 is an explanatory diagram showing in detail the ASV-ADMAP (audio still video address map) of FIG. 73. FIG. 74 is an explanatory diagram showing in detail the ASVOBS (Audio Still Video Object Set) of FIG. 73. FIG. 77 is an explanatory diagram showing in detail the highlight information pack, the still picture pack, and the sub picture pack of FIG. 76. FIG. 78 is an explanatory diagram showing the highlight information of FIG. 77 in detail. FIG. 78 is an explanatory diagram illustrating the still picture packet of FIG. 77 in detail. FIG. 78 is an explanatory diagram illustrating the sub picture packet in FIG. 77 in detail. FIG. 79 is an explanatory diagram showing a display screen by the highlight information pack, the still picture pack, and the sub picture pack of FIG. 78. FIG. 32 is an explanatory diagram showing a modification of the data structure of FIG. 31. FIG. 83 is an explanatory diagram showing in detail the still picture control information table (SPCIT), that is, ATS-ASV-PBIT (ATS audio still video playback information table) of FIG. 82. FIG. 84 is an explanatory diagram showing in detail the ATS-ASV-playback information search pointer (ATS-PG-ASV-PBIT-SRP # 1 to #m) in FIG. 83. It is explanatory drawing which shows the ASV display mode of FIG. 84 in detail. FIG. 84 is an explanatory diagram illustrating in detail ATS-ASV-PBI (ATS audio still video playback information) of FIG. 83; FIG. 87 is an explanatory diagram showing the ASV display list in FIG. 86 in detail. FIG. 87 is an explanatory diagram showing another ASV display list in FIG. 86 in detail. FIG. 87 is an explanatory diagram showing another ASV display list in FIG. 86 in detail. FIG. 87 is an explanatory diagram showing another ASV display list in FIG. 86 in detail.

Explanation of symbols

A pack 1st pack AOB audio object AOBS audio object set ATSI audio title set information ATSI-MAT audio title set information management table RTI pack 2nd pack SPS still picture set ASVS audio still video set SPCT Pack third pack

Claims (2)

A step of A / D converting an analog audio signal to generate audio data;
An audio title set (ATS) having the audio data, and a still picture set (SPS) having still picture data related to the audio data;
The still picture set ( SPS ) includes a plurality of still picture objects (SPOB) and still picture information (SPSI; also referred to as ASVSI) having a start address map for reproducing the still picture objects (SPOB) ;
The still picture object (SPOB) is
Substantially no sub-picture pack consists of a highlight pack and button display sub-picture data consisting of button operation for the highlight data of still pictures, first still picture having a still picture pack consisting of the still picture data An object (SPOB) ,
The highlight pack, the sub-picture pack, and the second still picture object (SPOB) having the still picture pack are configured.
The still picture information ( SPSI ) has palette information (ASVOBS sub-picture palette) for decoding the sub-picture data of the second still picture object (SPOB) ,
Further, the audio title set ( ATS ) has audio title set information ( ATSI ) including still picture control information ( SPCIT ) for page control of the still picture data ,
Further, the still picture control information (SPCIT) has a data structure including an effect mode at the start of each still picture and a start effect mode and a start effect period representing the effect period, respectively .
When the sub-picture pack has a pack header and a sub-picture packet, the sub-picture packet has a packet header and sub-picture data, and the sub-picture pack is a pack including the first data of sub-picture data, A step of formatting information indicating that into a data structure provided in the packet header of the pack;
An audio signal encoding method comprising: A method of decoding data generated by encoding according to the audio signal encoding method of claim 1, comprising:
A first decoding step of decoding palette information (ASVOBS sub-picture palette) for restoring a sub-picture of the second still picture object (SPOB) arranged in the still picture information (SPS I) ;
A second decoding step of decoding highlight data, sub-picture data and still picture data from the highlight pack, sub-picture pack and still picture pack arranged in the second still picture object (SPOB) ;
A third decoding step for decoding the effect mode and the effect period at the start of each still picture from the still picture control information (SPCIT);
Restoring at least the sub-picture data extracted in the second decoding step based on the information extracted from the first decoding step ( ASVOBS sub-picture palette) and outputting it together with the highlight data ;
The effect mode at the start of each still picture and its effect period are controlled by the start effect mode and the start effect period extracted in the third decoding step ,
Having a decoding method.

Images