JP3389245B1 - Audio recording medium and reproducing apparatus and method therefor - Google Patents

Abstract

Kind Code: A1 Abstract: It is possible to obtain time information and management information sufficient for a playback apparatus to perform various types of playback operations, and to improve the usability of the playback apparatus. An audio content having a cell that defines a playback unit of an audio title, and the playback order is defined by defining the playback order of the cell, includes three types of audio cells, a silent cell, a still picture cell, The recording data is created by limiting the arrangement order and defining the audio gap time (time during which the transfer of the stream is interrupted). Also, time information required for the playback device to play back the audio content and time information required for the user to operate the playback device (FAC_ST_PTM, ATS
_PG_PB_TM, ATS_PG_PA_TM, etc.) are recorded as management information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio data processing apparatus which is capable of easily processing (recording, reproducing, transmitting and constructing) high-quality audio data and satisfying a high-quality sound state. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium and a device for processing the signal.

[0002]

2. Description of the Related Art A DVD video disc has been developed as an optical disc that can record various information such as multi-angle video, sub-video, multi-lingual audio, and multi-channel audio while recording video (moving images) with high image quality and high density. It has started to spread and penetrate into the general market (DVD is an abbreviation for Digital Versatile Disc).

[0003] This DVD video disc, together with compressed multi-channel audio (AC-3, MPEG, etc.), is an uncompressed linear PCM (48 kHz sampling, 16-bit quantization to 96 kHz sampling, 24-bit).
Is also a specification that can be supported. The linear PCM of this DVD video has high-sampling and high-bit high-quality sound specifications exceeding the conventional music CD (44.1 kHz sampling, 16-bit quantization), especially 96 kHz.
Sampling 20 to 24 bit linear PCM has sufficient qualification as a next-generation digital audio disc (so-called super CD or super audio disc).

However, the specifications of the DVD video are created with priority to the video rather than the audio, and the DVD is not limited to the sampling frequency and the number of quantization bits, and the number of recordable channels and the recordable time.
It is also expected that audio priority specifications will exceed the audio specifications of video.

In response to the above expectations, the DVD audio specification has been studied (however, this DVD audio specification is not yet a conventional technology). With this DVD audio specification, the 48K-
96 kHz sampling, 16 to 24 bit linear P
As a matter of course, it is considered that CM can support up to 192 kHz sampling and 24-bit linear PCM. In addition, there is a possibility that higher sound quality specifications will be introduced in future version upgrades of the DVD audio specifications.

As described above, DVD audio can be adapted to future scale-up because it is possible to record a large amount of digital high-definition video in the target.
This is because the DVD audio has a part that can be used in common with the VD video.

[0007] Further, the DVD audio has a feature that it can enjoy future technical, market, and economic advantages that will be available as the DVD video evolves.

For example, if the recording time is kept constant by using a large-capacity DVD disc that will be put to practical use as a DVD video in the DVD audio, the sampling frequency, the number of quantization bits, the number of recording channels, etc. used for recording can be set. It has the potential to increase and increase. DVD-RAM (or rewritable DV) that will be put to practical use in the near future
The technology of the DVD video recorder using the D-RW or the write-once DVD-R) can be applied to the DVD audio recorder that will be put to practical use.

Further, if the market size of DVD-Video becomes wider due to the spread of DVD-Video, a medium (DVD-ROM disc, DVD-RA) will be used between DVD-Video and DVD-Audio.
M / DVD-RW disc, DVD-R disc, etc., device parts (disc drive, optical pickup,
Various ICs), various control programs, etc. are becoming common, and the cost reduction of DVD audio products with high sound quality and many features is accelerated. If DVD audio becomes widespread, DVD video will become available with the evolution of DVD audio.
You will be able to enjoy the economic advantage.

[0010]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Development of D audio is expected, but the above-mentioned DV
As seen in D-video, as a result of the development of high-density recording discs, it is expected that high-density recording will be possible, and therefore DVD audio that incorporates various functions and performances will be proposed and developed. It In other words, with regard to DVD audio, it is possible that different data structures will be produced in terms of performance such as sampling frequency, number of quantization bits, number of channels, etc. In addition, those that include menu video, those that do not, and background. There is a possibility that functionally different data structures will be produced, such as those that include video and those that do not.

When various types of data as described above are recorded, the user can naturally search for a target program or track, and recognize the time information and address information of the currently playing track. It is required to make it easier.

Therefore, an object of the present invention is that a reproducing apparatus and its user can obtain sufficient time information and management information for performing various kinds of reproducing operations,
An object of the present invention is to provide an audio data structure having improved usability of a reproducing device, a recording medium therefor and a reproducing device. .

[0013]

According to the present invention, data read and processed by using a computer control device has at least an audio object and management information, and the audio object (AOB) is a program (P
G), this program (PG) contains multiple cells (Cel
l), each cell contains multiple packs containing data, and some packs are not video.
A real-time pack (RTI_PCK) including real- time information that is additional data is defined, and as the types of the cells, an audio cell (A_C) whose data content is an audio output and a silent output. A silent cell (SI_C), which is a type including data, is defined, the management information is for reproducing the audio object, and program chain information (PGC).
I), the program chain information includes program chain general information (ATS_PGC_GI), a program information table (ATS_PGIT) including the numbers of the entry cells of a plurality of programs, and the reproduction position of the cell of each program. Cell playback information table (A
TS_C_PBIT), and the cell reproduction information table (ATS_C_PBIT) includes cell type information (C_TY) that identifies the types of the audio cell and the silent cell, and the start (S_SA) and end address (C_EA) of the cell. ), Cell index number (C_IX
N) is included, and the cell type information (C_TY) includes an audio cell consisting of audio data as "00".
b ”, an audio cell consisting of audio data and real-time information is“ 01b ”, and a silent cell is“ 10 ”.
Information identified as "b" and cell usage information (C_Usage) indicating whether the corresponding cell is a spotlight portion
In the program chain general information, a playback device that plays back the program stores time information of a value obtained by multiplying a predetermined number in order to recognize the total playback time of the plurality of programs. Further, in the program information table (ATS_PGIT), program time information (ATS_PG_PB_TM), which is a value multiplied by a predetermined number, is used in order for the reproducing apparatus for reproducing the program to recognize the program reproduction time of each of the plurality of programs. Pause time information (ATS_PG_PA_) multiplied by a predetermined number to obtain the pause time at the start of each program
TM) and an information recording medium in which is stored.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

The present invention makes it easy to handle high-quality audio data for processing (recording, reproducing, transmitting, and constructing), and records the audio data structure capable of satisfying the high-quality state. The present invention relates to a medium and a processing device and method.

In the embodiment, a plurality of contents (various video contents, various audio contents, etc.)
The case where it is applied to the system for sharing the object of will be described. An information medium having management data for sharing objects of a plurality of contents, a device for reproducing recorded information from this medium, a method of recording information including the management data on this medium, and the management data from this medium A case where the method is applied to a method of reproducing information based on is described as an example.

FIG. 1 is a perspective view for explaining the structure of an optical disc that can be used as a recording medium for DVD audio.

As shown in FIG. 1, this optical disk 10
Is a pair of transparent substrates 1 each provided with a recording layer 17.
4 has a structure in which the adhesive layers 20 are bonded together. Each board 14
Can be made of polycarbonate having a thickness of 0.6 mm, and the adhesive layer 20 can be made of an ultrathin (for example, 40 μm thick) ultraviolet curable resin. These pair of 0.
By laminating the 6 mm substrate 14 so that the recording layer 17 is in contact with the surface of the adhesive layer 20, the large-capacity optical disk 10 having a thickness of 1.2 mm is obtained.

A central hole 22 is provided in the optical disk 10, and a clamping area 24 for clamping the optical disk 10 during rotational driving is provided around the central hole 22 on both sides of the disk. A spindle of a disc motor is inserted into the center hole 22 when the optical disc 10 is loaded in a disc drive device (not shown).
Then, the optical disc 10 is clamped in the clamp area 24 by a disc clamper (not shown) while the disc is rotating.

The optical disk 10 has an information area 25 around the clamp area 24 in which video data, audio data and other information can be recorded.

A lead-out area 26 is provided on the outer peripheral side of the information area 25. In addition, the lead-in area 27 is provided on the inner peripheral side in contact with the clamp area 24.
Is provided. A data recording area 28 is defined between the lead-out area 26 and the lead-in area 27.

Recording layer (light reflecting layer) 17 in the information area 25
Recording tracks are continuously formed in, for example, a spiral shape. The continuous track is divided into a plurality of physical sectors, and these sectors are numbered consecutively. Various data is recorded on the optical disc 10 using this sector as a recording unit.

The data recording area 28 is an actual data recording area and includes a DVD audio data recording area and a DVD video data recording area. (In the case of a pure audio disc, the DVD video data recording area may not be used.) In the DVD audio data recording area, mainly audio data is recorded / reproduced information as a pit string (optically reflected by laser reflected light). The physical shape or phase state that causes such changes. In some cases, still picture data may be recorded in this DVD audio data recording area. The audio data recorded in the DVD audio data recording area may include, in addition to normal music data, completely silent data (data that does not intentionally produce sound, not a silent portion as music). .

On the other hand, in the recording area of the DVD video data, as recording / playback information, video data (main video data) of movies, sub-video data of subtitles / menus, and audio data of dialogue / sound effects, It is recorded in the same pit row.

When the optical disk 10 is a DVD-RAM disk (or rewritable disk; DVD-RW disk) which is a single-sided single-sided and double-sided recording type, each recording layer 17 is provided.
Is a mixture of two zinc sulfide / silicon oxides (ZnS / S
iO2) phase change recording material layer (eg Ge2Sb2T)
e5) may be sandwiched between three layers.

The optical disk 10 is a single-sided single-layered R recording medium
In the case of an AM disc, the recording layer 17 on the read surface 19 side
Can be composed of a triple layer including the phase change recording material layer. In this case, the layer 17 arranged on the opposite side from the reading surface 19 does not need to be an information recording layer, and may be a simple dummy layer.

The optical disk 10 is a single-sided read type dual layer R
In the case of an AM / ROM disc, the two recording layers 17 are
One phase change recording layer (back side from the reading surface 19; for reading and writing) and one semitransparent metal reflection layer (reading surface 19
The front side when viewed from the side; only for playback).

The optical disc 10 is a write-once DVD-
In the case of R, polycarbonate is used as the substrate, gold is used as the reflection film (not shown), and ultraviolet curable resin is used as the protection film (not shown). In this case, an organic dye is used for the recording layer 17. As this organic dye, cyanine, squarylium, croconic, triphenylmenthane dye, xanthene, quinone dye (naphthoquine, anthraquinone, etc.), metal complex dye (phthalocyanine, porphyrin, dithiol complex, etc.) and others can be used. is there.

For writing data to such a DVD-R disc, for example, the output is 6 to 12 m at a wavelength of 650 nm.
It can be performed using a semiconductor laser of about W.

The optical disc 10 is a single-sided read type dual layer R
In the case of an OM disc, the two recording layers 17 can be composed of one metal reflective layer (the back side when viewed from the read surface 19) and one semitransparent metal reflective layer (the front side when viewed from the read surface 19).

Read-only DVD-ROM disc (for DVD audio and / or DVD video) 1
In the case of 0, a pit train is formed in advance on the substrate 14 by a stamper, a reflective layer of metal or the like is formed on the surface of the substrate 14 on which the pit train is formed, and this reflective layer is used as the recording layer 17. . In such a DVD-ROM disc 10, normally, no groove is provided as a recording track, and a pit row formed on the surface of the substrate 14 functions as a track.

In each of the various optical discs 10 described above, read-only ROM information is recorded on the recording layer 17 as an embossed signal. On the other hand, the substrate 14 having the recording layer 17 for reading and writing (or for write once) is not engraved with such an emboss signal, but instead is engraved with a continuous groove groove. A phase change recording layer or the like is provided in the groove. Read / write DVD
In the case of a RAM disk, the phase change recording layer in the land portion is also used for information recording in addition to the groove.

When the optical disk 10 is a single-sided read type (whether the recording layer is one layer or two layers), the substrate 14 on the back side as viewed from the read surface 19 need not be transparent to the read / write laser. In this case, label printing may be performed on the entire surface of the back substrate 14.

FIG. 2 is a diagram for explaining the correspondence relationship between the data recording area 28 of the optical disk 10 of FIG. 1 and the recording track of the data recorded therein.

The disk 10 is a DVD-RAM (or D
In the case of VD-RW), the main body of the disk 10 is housed in a cartridge (not shown) in order to protect the delicate disk surface. When the DVD-RAM disk 10 together with the cartridge is inserted into a disk drive of a DVD player (FIGS. 29 to 30) which will be described later, the disk 10 is pulled out from the cartridge and clamped on a turntable of a spindle motor (not shown), so that an optical disk (not shown) It is rotationally driven so as to face the head.

On the other hand, the disk 10 is a DVD-R or D
In the case of a VD-ROM, the main body of the disc 10 is not housed in the cartridge, and the bare disc 10 is set directly on the disc tray of the disc drive.

Recording layer 17 of information area 25 shown in FIG.
The data recording tracks are continuously formed in a spiral shape. As shown in FIG. 2, the continuous track is divided into a plurality of logical sectors (minimum recording unit) having a constant storage capacity, and data is recorded on the basis of the logical sectors. The recording capacity of one logical sector is set to 2048 bytes (or 2 kbytes), which is the same as the data length of one pack.

The data recording area 28 is an actual data recording area in which management data and audio data for DVD audio are recorded, and management data, main video (video) data, sub-video data and DVD video are recorded. Audio data is also recorded.

Although not shown, the disk 1 shown in FIG.
When 0 is a DVD-RAM disc, the data recording area 28 can be divided into a plurality of recording areas (a plurality of recording zones) in a ring shape (annular ring shape). In this case, although the angular velocity of disk rotation is different for each recording zone, the linear velocity or angular velocity can be made constant within each zone. When the disc 10 of FIG. 2 is a DVD-ROM disc, various data are recorded in the entire data recording area 28 at a constant linear velocity.

FIG. 3 is a diagram for explaining a hierarchical structure of information recorded in the DVD audio zone among various information recorded on the optical disc of FIG.

In FIG. 3, the data recording area 28 formed on the optical disk 10 has a structure as shown in the figure. The logical format of this structure is defined in accordance with, for example, one of the standards, ISO9660 and Universal Disc Format (UDF) Bridge.

The data recording area 28 between the lead-in area 27 and the lead-out area 26 is assigned as a volume space 28. The volume space 28 includes a space for volume and file structure information (volume / file structure 70), D
Space for VD standard applications (DVD audio zone 71 and DVD video zone 72),
A space (other recording area 73) other than the application of this standard can be included.

The volume space 28 is physically divided into a large number of sectors, and these physical sectors are numbered consecutively. The logical address of the data recorded in this volume space 28 means the logical sector number as defined by ISO9660 and UDF bridge. The logical sector size here is 2048 bytes (2 k bytes), similar to the effective data size of the physical sector.
Byte). Serial numbers are added to the logical sector numbers in ascending order of the physical sector numbers.

Unlike the logical sector, redundant information such as error correction information is added to the physical sector. Therefore, to be exact, the physical sector size does not match the logical sector size.

As shown in FIG. 3, volume space 2
8 includes a volume / file structure area 70, a DVD audio zone 71, a DVD video zone 72 and another recording area 73. Each of these areas (70-7
3) is divided on the boundary of the logical sector in FIG.
Here, one logical sector is defined as 2048 bytes, and
The logical block is also defined as 2048 bytes. Therefore, one logical sector is defined as one logical block.

The volume / file structure area 70 is
It corresponds to the management area defined by SO9660 and UDF bridge. Based on the description of the area 70, the contents of the audio manager (AMG) 711 are D
It is stored in the system memory inside the VD player (FIG. 29).

The DVD audio zone 71 is composed of an audio manager (AMG) 711 and one or more audio title sets (ATS # m) 712 (the maximum number m of audio title sets is 99).

The AMG 711 includes an audio manager information (AMGI) file 7110 and an audio manager menu video object set (AMGM_).
VOBS) file 7111 and audio manager information backup (AMGI_BUP) file 7112
Composed of and. Note that AMGM_VOBS7111 is an optional file and may not exist.

Each ATS 712 has an audio title set information (ATSI) file 7120, an audio only title audio object set (AOTT_AOBS) file 7121, and an audio title set information backup (ATSI_BU).
P) file 7123. AOTT
_AOBS7121 is composed of 1 to 9 files, but these are optional files and may not be included.

Now referring to FIG. 6 first, AOTT_AO
The BS7121 will be described. As I will explain later, AOTT
_AOBS7121 defines a collection of one or more audio objects AOB. Each AOB defines a collection of one or more audio title set cells (ATS_C #). An audio title set program is composed of one or more cells, and an audio title set program chain PGC is composed of one or more programs.

Returning to FIG. In FIG. 3, AOTT_AOBS
The configuration of 7121 is shown directly at the level of the ATS_C # collection. The PGC is represented by the program chain information in the ATS.

If one PGC is compared to one opera,
The plurality of cells forming the PGC can be interpreted as corresponding to music or singing parts of various scenes in the opera. The contents of this PGC (or the contents of the cell) are
It is determined by the software provider that produces the content recorded on the disc 10. That is, the provider is the program chain information ATS_PGC in the ATS.
By using the cell reproduction information ATS_C_PBI written in I, the cells forming the AOTT_AOBS 7121 can be reproduced as intended. (ATS_PGCI
24 to 28 for ATS_C_PBI.
Will be described later with reference to. ) In the other recording area 73, information that can be used in the above-mentioned video title set VTS 72 or other information that is not related to the video title set can be recorded. This area 73 is not essential and may be deleted if it is not used.

FIG. 4 is a diagram for explaining a hierarchical structure of information recorded in the DVD video zone among various information recorded in the optical disc of FIG. Hereinafter, the description of the parts already described with reference to FIG.

Based on the description of the volume / file structure area 70, the contents of the video manager 721 are stored in the system memory inside the DVD player (FIG. 29) described later.

The DVD video zone 72 is composed of a video manager (VMG) 721 and one or more video title sets (VTS # n) 722 (the number n of video title sets is 99 at the maximum).

The VMG 721 includes a video manager information (VMGI) file 7210 and a video object set for a video manager menu (VMGM_VOB).
S) file 7211 and video manager information backup (VMGI_BUP) file 7212. Note that VMGM_VOBS7211 is an optional file and may not exist.

Each VTS 722 includes a video title set information (VTSI) file 7220 and a video object set for a video title set menu (VTSM).
_VOBS) file 7221 and the video object set of the video title set title (VTSTT_
VOBS) file 7222 and video title set information backup (VTSI_BUP) file 722
3 and 3. Note that VTSM_VOBS7221
Is an optional file and may or may not be present.

Each video title set VTS 72 includes
Video data compressed according to the MPEG standard (video pack described below), audio data compressed according to a predetermined standard or uncompressed (audio pack described below),
And run-length compressed sub-picture data (sub-picture pack described later; including bitmap data in which one pixel is defined by multiple bits), and information for reproducing these data (navigation pack described later; presentation control) Information and data search information).

Here, referring to FIG. 8, first, VTSTT_V
The OBS7222 will be described. As I will explain later, VTS
TT_VOBS7222 defines a collection of one or more video objects VOBs. Each VOB defines a collection of one or more video title set cells (VTS_C # n). VTS_C # n is composed of one or more video object units (VOBU), and VOBU
Can include a navigation pack, a video pack, an audio pack, and a sub-picture pack. A group of one or more video title cells constitutes a program of a video title set, and a group of one or more programs constitutes a program chain PGC of a video title set.

Returning to FIG. FIG. 4 shows the relationship between the program chain and the video title set cell (VTS_C # n).

If one PGC is compared to one drama,
The plurality of cells forming the PGC can be interpreted as corresponding to various scenes in the drama. The contents of the PGC (or the contents of the cell) are determined by the software provider who produces the contents recorded on the disc 10. That is, similarly to the case of ATS_PGCI described in FIG. 3, the provider uses VTSTT_VOBS7222 by using the cell reproduction information (not shown) written in the program chain information VTS_PGCI in the VTS.
It is possible to reproduce the cells constituting the cell as intended.

FIG. 5 shows program chain information ATS_PGCI of the DVD audio zone of FIG. 3 and program chain information VTS_ of the DVD video zone of FIG.
Specific video information (VTS_C # from both PGCI)
2 is a diagram illustrating a case where VTS_C # 3, VTS_C # 3, and VTS_C # 5 are commonly (but differently) accessed. In other words, FIG. 5 illustrates the case where the same video object VOB is referenced in different ways from the audio side reproduction unit and the video side reproduction unit.

That is, when the video reproduction is performed from the video title set side, the cell VTS_C # 1 of the VOB is read by the cell reproduction information (not shown) in the VTS_PGCI.
~ VTS_C # 6 are reproduced in sequence.

On the other hand, when video reproduction (or still reproduction) is performed from the audio title set side, ATS
According to the cell playback information in _PGCI (Fig. 28), VOB
Cells VTS_C # 2, VTS_C # 3 and VTS_
C # 5 is selectively reproduced.

In this case, cell data (VTS_C # 2, VTS) having the same ATS and VTS in the same disk 10 is used.
_C # 3 and VTS_C # 5) do not have to be separately provided, so that the limited capacity of the disk 10 can be effectively used.

FIG. 6 shows an example of the data structure of the recorded contents (AOTT_AOBS) of the DVD audio zone of FIG.

AOTT_AOB described with reference to FIG.
S7121 defines a group of one or more audio objects AOTT_AOB #, as shown in FIG. Each AOTT_AOB is one or more audio cells AT
It defines a collection of S_C #. A program is composed of one or more cells ATS_C #, and a program chain PGC is composed of one or more programs. The PGC constitutes a logical unit showing all or part of the audio title.

In the example of FIG. 6, each audio cell ATS_
Audio pack A_P with C # of 2048 bytes
It is composed of a set of CKs. These packs are the minimum unit when performing data transfer processing. Also, the minimum unit for logical processing is a cell unit, and the logical processing is performed in this cell unit.

FIG. 7 shows another example of the data structure of the recorded contents (AOTT_AOBS) in the DVD audio zone of FIG. The example of FIG. 7 is different from that of FIG. 6 in the configuration of the cell and the pack.

That is, the audio object AOTT_AOB # 1 in FIG. 7 is the picture cell ATS_C #.
1, silent cell ATS_C # 2, audio cell A
It includes TS_C # 3 and the like. Next AOTT_AOB #
Although not shown, 2 may be composed of only the audio cell ATS_C. The main is an audio cell, but a picture cell and / or a silent cell are appropriately added to it.

The picture cell ATS_C # 1 is composed of one or more still picture packs SPCT_PCK, and the silent cell ATS_C # 2 is composed of one or more silent audio packs A_PCK. The playback time of this silent cell is set to about 0.5 seconds or more. The audio cell ATS_C # 3 is configured by an audio pack A_PCK, including a real-time information pack RTL_PCK having real-time information as appropriate.

When the data transfer of the still picture pack SPCT_PCK is performed during the reproduction operation of the DVD audio player, a short time (about 0.5 seconds to 0.
The sound breaks for 6 seconds). This break in sound is called an audio gap. It is bad that an audio gap occurs during music playback, so the above still picture pack SPCT_PC
The data transfer of K is normally performed before the start of the album reproduction in FIG. 9, the start of the specific group reproduction, or the start of the specific track.

Note that once the still picture pack SPCT_PCK has been transferred inside the DVD audio player, the still picture corresponding to the contents of this SPCT_PCK is held in the image memory in the player. The still picture in this memory can be continuously reproduced during the reproduction of the contents (music, etc.) of the audio pack A_PCK (however, the still picture can be deleted from the monitor at any time if the user desires).

FIG. 8 shows an example of the data structure of the recorded contents (VTSTT_VOBS) in the DVD video zone of FIG.

VTSTT_VO described with reference to FIG.
The BS7222 defines a group of one or more video objects VOB #, as shown in FIG. Each VOB
Defines a collection of one or more video cells VTS_C #. Each VTS_C defines a group of one or more video object units VOBU. A program is composed of one or more cells VTS_C #, and a program chain PGC is composed of one or more programs. This PGC constitutes a logical unit showing all or part of a video title or visual menu.

As shown in FIG. 8, each VOBU has a navigation pack at the top and a video pack (MPEG).
Compressed video data), sub-picture pack (run length compressed bitmap data), and audio pack (uncompressed linear PCM audio data or compressed multi-channel audio data) ing. That is, the video object unit VOBU is defined as a set of all packs recorded from one navigation pack to immediately before the next navigation pack. This navigation pack is incorporated in each VOBU so that an angle change (seamless angle change reproduction or non-seamless angle change reproduction) can be realized.

Similar to the case of FIG. 6 or FIG. 7, these packs are the minimum unit for performing the data transfer processing.
Also, the minimum unit for logical processing is the cell unit,
Logical processing is performed in units of this cell.

The reproduction time of the VOBU is the same as the VOBU.
It corresponds to the reproduction time of video data composed of one or more video groups (group of pictures; GOP for short) contained therein, and the reproduction time is set within the range of 0.4 seconds to 1.2 seconds. . 1 GOP is screen data that is normally about 0.5 seconds according to the MPEG standard and is compressed so as to reproduce about 15 images during that time.

If the VOBU contains video data,
A GOP (conforming to the MPEG standard) composed of a video pack, a sub-picture pack and an audio pack is arranged to form a video data stream. But this G
Regardless of the number of OPs, a VOBU is defined on the basis of the GOP playback time, and a navigation pack is always placed at the beginning of the VOBU.

When reproducing a DVD video,
Even if the reproduction data is only audio and / or sub-picture data, the reproduction data is configured with VOBU as one unit. For example, assume a case where a VOBU is composed of only an audio pack, starting with a navigation pack. In this case, like the VOBU of video data, an audio pack to be played back within the playback time (0.4 seconds to 1.2 seconds) of the VOBU to which the audio data belongs is stored in that VOBU.

As shown in FIG. 8, VTSTT_VOBS
Is defined as a set of one or more VOBs, and this VOBS
The VOB inside is used for the same purpose.

The VOBS for the menu is usually one V
The OB is composed of a plurality of menu screen display data. On the other hand, a VOBS for a video title set is usually composed of multiple VOBs.

Here, the VOB forming the video object set VTSTT_VOBS for the title set is
Taking a concert video of a certain rock band as an example, it can be considered that it corresponds to the video data of the performance of that band. In this case, by designating a certain VOB, it is possible to reproduce the concert performance music, for example, the third music of the band.

Further, the VOB forming the menu video object set VTSM_VOBS stores the menu data of all the songs of the concert performance music of the band, and according to the display of the menu, a specific music, for example, the encore performance music is reproduced. be able to.

In a normal video program, one VOB can form one VOBS. In this case, one video stream is completed by one VOB.

On the other hand, for example, in the case of an animation collection of a plurality of stories or a movie of omnibus format, one VO
It is possible to provide a plurality of video streams (a plurality of program chains PGC) corresponding to each story in the BS. In this case, the VO corresponding to each video stream
Will be stored in B. At that time, the audio stream and the sub-picture stream related to each video stream are also completed in each VOB.

An identification number (#i; i = 0 to i) is attached to the video object VOB, and the VOB can be specified by this identification number. VOB is
It is composed of one or more cells. A normal video stream is composed of a plurality of cells, but a menu video stream may be composed of one cell.
Each cell has an identification number (#j; j) as in the case of VOB.
= 0 to j) are attached.

FIG. 9 shows an example of the data structure of the recorded contents of the user accessible DVD audio zone 71, which is recorded on one side (one layer or two layers) of the optical disc of FIG.

In DVD audio, an album, a management structure of recorded contents viewed from the software production side,
It has a hierarchical structure consisting of groups, tracks, and indexes.

The album is a DVD audio disc 10
Corresponding to one side of, and, for example, "Vol. 1 of Beethoven's work collection" can be assigned to this album. In this case, this album can be composed of, for example, Symphony No. 1 Group # 1 to Symphony No. 9 Group # 9.

Each group (for example, group # 1)
It is composed of tracks # 1 to # 4 corresponding to the first to fourth movements of the corresponding symphony (symphony No. 1). Further, each track is composed of indexes # 1 to #i whose contents are appropriately divided into i.

DVD produced with a hierarchical structure as shown in FIG.
When the user plays the audio disc 10, the user sets the disc 10 in the DVD audio player (FIGS. 29 to 30), and then operates a remote controller (not shown) to perform the operation for the group # 1 and the track # 1. Can be selected.

When the user presses the play button of the remote controller after making this selection, the DVD audio player starts playing from the beginning of the first movement of Beethoven's symphony No. 1. When the user further designates a specific index from the remote controller, the designated index portion is searched and reproduced from that portion. (The first index portion of the first track of the first group of the album can be played back by default even if the user does not specify anything.) In the case of playing a DVD video disc, the user does not specify the title (specific , Etc.), but the user cannot see the “title” in the case of a DVD audio disc. The user can only see the “album”, “group”, “track”, and “index” of FIG. 9.

FIG. 10 shows a directory structure of information (DVD audio and DVD video data files) recorded on the optical disk of FIG. This figure shows a DVD
It is an example of a file directory structure defined by a file standard.

Similar to the hierarchical file structure adopted by a general-purpose operating system of a computer, a subdirectory of a video title set VTS, a subdirectory of an audio title set ATS, a user-defined directory, etc. are connected under a root directory. .

In the subdirectory of the video title set VTS, various video files (VMGI, VM
Files such as GM, VTSI, VTSM, VTS; Fig. 4
(See) is arranged so that each file is managed in an orderly manner.

Further, various audio files (files such as AMGI, ATSI, ATS; see FIG. 3) are arranged in the sub-directory of the audio title set ATS, and each file is managed in an orderly manner. There is.

The user can select a specific file (specific VTS
Alternatively, a specific ATS) can be accessed by specifying the path from the root directory to the file.

DV made in conformity with the DVD video standard
When playing back a DVD video disc made in conformity with the DVD video standard, the D video player first reads the management information (VMG) in the video title set VTS directory under the root directory, and uses that information to read the video content. To play. However, VMG
Only the video content (VTS) recorded in the VTS directory can be reproduced by.

On the other hand, a DVD audio player (or DVD video / DVD audio compatible player) made in conformity with the DVD audio standard is a DVD
When reproducing a DVD audio disc made in conformity with the audio standard, first, the management information (AMG) in the audio title set ATS directory under the root directory is read, and the audio content is reproduced by that information. In this case, what can be played back by AMG is not limited to the audio content (ATS) recorded in the ATS directory, but the video content (VTS) in the VTS directory can also be played (the mechanism is shown in FIG. 12 and subsequent figures). See below for reference).

FIG. 11 shows another example of the directory structure of information (DVD audio and DVD video data files) recorded on the optical disk of FIG.

In the example of FIG. 10, the VTS directory is also AT
The S directory is also located at the same hierarchical level below the root directory. On the other hand, in the example of FIG. 11, the ATS directory (child directory) is arranged under the root directory (parent directory), and the VTS directory (grandchild directory) is arranged under the ATS directory.

FIG. 12 is a diagram for explaining a case of accessing a file in the directory on the video content side from the directory on the audio content side in the directory structure of FIG.

That is, in the hierarchical management structure for managing the data files recorded on the AV disc 10, the video title set directory (child directory) and the audio title set directory (child directory) are arranged under the root directory (parent directory). Has been done.

Video title set directory (VT
The S directory) is a directory for handling video content files recorded on the disc 10 and includes a video manager VMG file and one or more video title set VTS files (video content logical units) (FIG. 4). reference).

The audio title set directory (ATS directory) is a directory for handling audio content files recorded on the disc 10, and includes files of the audio manager AMG and 1
The file of the above audio title set ATS (logical unit of audio content) is included (see FIG. 3).

The VMG in the VTS directory manages only the VTS, and can only access the VTS in the VTS directory.

On the other hand, the AMG in the ATS directory mainly manages the ATS, but not only the ATS in the ATS directory but also the VTS in the VTS directory.
Is also accessible.

The concrete contents will be described later with reference to FIGS. 17 to 20, but AMG is audio manager information AM.
GI (FIG. 17), AMGI includes a search pointer table ATT_SRPT for audio titles (FIG. 17), ATT_SRPT is a search pointer ATT_SRP for audio only titles (AOTT) and search pointer ATT_SRP for audio video (AVTT). (Fig. 20).

That is, the AMG of the ATS directory is
AT by search pointer ATT_SRPT for AOTT
Audio title set ATS # in S directory
1, ATS # 2, ... And the video title sets VTS # 1, VTS # in the VTS directory can be accessed by the AVTT search pointer ATT_SRPT.
2, ... can be accessed. As a result, a certain object (VTS # 1 or the like) can be shared by both video content and audio content. This is one of the important features of the "object sharing system" of the present invention.

FIG. 13 is a diagram for explaining a case where files in the directory on the audio content side are linked to files in the directory on the video content side in the directory structure of FIG. 13 is the same as FIG.
It can be regarded as a second modification.

That is, in the example of FIG. 12, the audio manager AMG is configured to access both the audio title set ATS and the video title set VTS, so that a certain VTS is shared by the video content and the audio content. There is.

On the other hand, in the example of FIG. 13, information (address of a predetermined portion of VTS # 1) for linking a certain audio title set (ATS # 1 here) to a certain video title set (VTS # 1 here). (Pointer, etc.) is being written. By doing this,
For example, audio data in VTS # 1 can be shared by video content and audio content.

FIG. 14 is a data structure diagram for explaining an example of how the file access shown in FIG. 12 is performed within the volume space shown in FIGS. 3 and 4. The data structure of FIG. 14 corresponds to the directory structure of FIG.

In FIG. 14, the hatched portion illustrates the content shared by the video content (or video volume) and the audio content (or audio volume).

The basic concept of the data structure in FIG. 14 is that the recording area (VMG + VTS) for video contents and the recording area (AMG + AT) for audio contents are used.
S) and S) are independently recorded in the volume space 28, and video contents commonly used not only for video but also for audio can be managed from AMG.

As a concrete example, in FIG.
While the video title set VTS # 1 managed by the can access a part (cell) of the video object set VOBS # 1, the audio title set ATS # 1 managed by AMG can be the other part (cell) of the VOBS # 1. You can access to. In this example, VTS
A part (see FIG. 8) of cells forming the # 1 video object set VOBS # 1 is shared by the video content and the audio content.

In the data structure of FIG. 14, the DVD audio zone 71 is arranged in the smaller address (closer to the lead-in area 27 of FIG. 3) and the DVD video zone 72 is arranged in the larger address (lead-out of FIG. 3). It is located near the area 26). In this case, AMG is A
When accessing the TS and the VTS, it is sufficient to always use the address that changes in the + direction, and since it is not necessary to handle the address in the-direction, the construction of the reproducing system becomes easy.

FIG. 15 is a data structure diagram for explaining another example of how the file access of FIG. 12 is performed within the volume space of FIGS. 3 and 4.
FIG. 15 can be regarded as a modification of FIG.

In FIG. 14, the DVD audio zone 71
Is arranged in the smaller address and the DVD video zone 72 is arranged in the larger address, so that it is not necessary to handle the address in the-direction as described above.

On the other hand, in FIG. 14, the DVD video zone 7
2 has a smaller address (lead-in area 27 in FIG. 3)
3), and the DVD audio zone 71 is arranged at the one with the larger address (the one closer to the lead-out area 26 in FIG. 3). In this case, AMG is AT
When accessing S, the + direction address is handled and VT
When accessing S, an address in the negative direction will be handled. In this case, addressing when accessing a desired object (cell in ATS or VTS) is troublesome, and it becomes difficult to adopt it in a consumer DVD audio player in which product cost is a problem.

However, when a personal computer having a DVD drive is converted into a DVD audio player by software, even if the data structure shown in FIG. 15 is adopted,
Cost issues can be avoided. In other words, the operating system (or control software) of the personal computer that has once analyzed the data structure of FIG. 15 remaps the address in its own memory, and the data structure physically located in FIG. 15 is seen. It can be converted to the arrangement shown in FIG. Then, the MPU or CPU of the personal computer, as in the case of FIG.
MG will be able to access both ATS and VTS.

FIG. 16 is a data structure diagram for explaining still another example of how the file access shown in FIG. 12 is performed within the volume space shown in FIGS. 3 and 4. FIG. 16 can also be regarded as a modification of FIG. 14.

In FIG. 14, the DVD audio zone 71 is shown.
Is arranged in the smaller address and the DVD video zone 72 is arranged in the larger address, so that it is not necessary to handle the address in the minus (-) direction as described above.

On the other hand, in the data structure of FIG. 16, D
The AMG of the VD audio zone 71 is arranged in the smaller address (closer to the lead-in area 27 of FIG. 3), and the VMG of the DVD video zone 72 is larger in the address than the AMG (in the lead-out area 26 of FIG. 3). It is located in the near side). In this case, AMG is ATS
It is sufficient to always use the address changing in the + direction when accessing the VTS and the VTS, and it is not necessary to handle the address in the-direction. Therefore, as in the case of FIG. 14, the construction of the reproduction system becomes easy.

However, in the data structure of FIG. 16, ATS #
1 has a "nested" structure in which VTS # 1 and the like are arranged, the VMG in FIG. 4 cannot recognize that the VTS in the ATS exists in the DVD video zone 72. In this case, the VMG can be treated as if the VTS in the ATS exists in the other recording area 73.

The data structure of FIG. 16 can be used when the AMG can access not only the ATS but also the VTS and the other recording area 73 is used.

The three types of data structures "AMG can access ATS and VTS" have been described above, but the most preferred is the data structure of FIG. The reason is that the desired shared object can be accessed only by addressing in the + direction without address remapping.

FIG. 17 is a diagram for explaining the recorded contents of the audio manager information AMGI in the DVD audio zone of FIG.

The contents handled in the DVD audio zone 71 include the audio only title AOTT,
There are two types of audio titles with video (or audio / video titles) AVTT.

AOTT is a title in the audio disc (A disc) 10 that does not have a video part and is recorded under the audio title set directory.
Defined in TS. On the other hand, AVTT is a title in the audio disc (AV disc) 10, has a video portion, and is defined in the VTS recorded under the video title set directory. And AOTT and A
The generic name of VTT is defined as ATT (audio title).

The DVD audio zone 71 in which the above-mentioned ATT data is recorded is AMG711 and one or more (maximum 99) audio title sets (ATS # 1 to ATS # 1).
TS # m) 712.

The AMG 711 includes an audio manager information AMGI file 7110 and an audio manager menu video object set AMGM_VOB.
It is composed of an S file (option file) 7111 and an audio manager information backup AMGI_BUP file 7112.

The AMGI file 7110 includes an audio manager information management table AMGI_MAT and an audio title search pointer table ATT_SR.
It includes PT, audio only title search pointer table AOTT_SRPT, audio manager menu program chain information unit table AMGM_PGCI_UT, and audio text data manager ATXTDT_MG.

That is, the AMG is the two search information A
It has TT_SRPT and AOTT_SRPT. Where ATT_SRPT is AOTT and AVT
A table describing search information for both T and AOT
T_SRPT is a table that describes search information only for AOTT.

As described above, the search information for AVTT is
Instead of dividing into two types for OTT, ATT (AOTT
And AVTT) (for ATT_SR in FIG. 20 described later)
PT) and AOTT (AOTT_SR in FIG. 22 described later)
The reason for dividing it into two types is to simplify the reproducing method for various DVD players.

FIG. 18 shows the recorded contents of the audio manager information management table AMGI_MAT included in the audio manager information AMGI of FIG.

That is, in this audio manager information management table AMGI_MAT, the audio manager identifier (AMG_ID); the end address of the audio manager (AMG_EA); the end address of the audio manager information (AMGI_EA); the corresponding optical disc (DVD audio disc) 10 Version number of adopted standard (VERN); Volume setting identifier (VLMS_ID); Number of title sets (TS_N)
s); Provider (software creator / seller) identifier (PVR_ID); Audio manager information management table end address (AMGI_MAT_E)
A); Start address (AMGM_VOBS_) of the video object set in the audio manager menu
SA); audio title search pointer table start address (ATT_SRPT_SA); audio only title search pointer table start address (AOTT_SRPT_SA); audio manager menu program chain information unit table start address (AMGM_PG)
CI_UT_SA); Start address of audio text data manager (ATXTDT_MG_S)
A); Video attributes (AMGM_V_AT) for the video object set in the audio manager menu
R); number of sub-picture streams for audio manager menu (AMGM_SPST_Ns); attribute of sub-picture for video object set of audio manager menu (AMGM_SPST_ATR); number of audio streams for audio manager menu (AM
GM_AST_Ns); Audio attribute (AM) for video object set in Dio Manager menu
GM_AST_ATR); other reserved areas are provided.

Start address AMGM_V of the video object set in the above audio manager menu
The start address of AMGM_VOBS is written in OBS_SA with the number of relative blocks from the first logical block of AMG. If there is no AMGM_VOBS, "00000000h" is this AMGM_VOB.
Written to S_SA.

The start address ATT_SRPT_
In SA, the start address of ATT_SRPT is written with the number of relative blocks from the first logical block of AMGI.

The start address AOTT_SRPT
The start address of AOTT_SRPT is written in _SA with the relative block number from the first logical block of AMGI.

ATT_SRPT_SA or AOTT_SRPT_ written in AMGI_MAT in FIG.
From SA, audio title search pointer ATT
_SRPT or the audio-only title search pointer AOTT_SRPT can be found on the disc 10.

FIG. 19 is a view for explaining the contents of the audio title search pointer table ATT_SRPT included in the audio manager information AMGI of FIG. AMGI has two types of search pointers ATT_SR.
Although it has PT and AOTT_SRPT,
Indicates a search pointer ATT_SRP that can access both AOTT and AVTT.

That is, ATT_S included in AMGI
The RPT is audio title search pointer table information ATT_SRPTI and one or more audio title search pointers ATT_SRP (ATT_SRP # 1).
~ ATT_SRP # n). ATT_SRPTI is the number of audio title search pointers and ATT_SR
It contains the end address of the PT.

FIG. 20 shows each audio title search pointer (ATT_SR here) included in the audio title search pointer table ATT_SRPT of FIG.
It is a figure explaining the content of SRP # n).

The DVD audio standard handles not only sound but also images, and AMG has two pieces of search information ATT_SRPT and AOTT_SRPT. ATT_SRPT in FIG. 20 is AOTT and A
It is a table describing search information for both VTTs.

In FIG. 20, a search pointer AOTT_ATT_SRP for audio-only titles
Is the category of the audio title ATT, the number of programs in the audio title ATT, the total playback time of the audio title ATT, the number of the audio title set ATS, and the audio title set AT.
S title number and audio title set ATS
And the start address of.

The search pointer AVTT_SRP for audio titles with video is the category of the audio title ATT, the total playback time of the audio title ATT, the title playback format, the number of angles included in the video, and the parts included in the video. It includes the number of titles, the number of the video title set VTS, the title number of the video title set VTS, and the start address of the video title set VTS.

FIG. 21 is a view for explaining the contents of the audio-only title search pointer table AOTT_SRPT included in the audio manager information AMGI of FIG. AMGI has two types of search pointers ATT_SRPT and AOTT_SRPT, but FIG. 21 shows a search pointer AOTT_SRP that can access only AOTT.

That is, AOTT_ included in AMGI
SRPT is audio-only title search pointer table information AOTT_SRPTI and one or more audio-only title search pointers AOTT_.
SRP (AOTT_SRP # to AOTT_SRP # m)
including. AOTT_SRPTI contains the number of audio-only title search pointers and the end address of AOTT_SRPT.

FIG. 22 shows the search pointer table AOTT_SRPT for the audio-only title shown in FIG.
3 is a diagram for explaining the content of an audio only title search pointer (AOTT_SRP # m in this case) included in FIG.

According to the DVD audio standard, not only sound but also image can be handled. AMG has two search information ATT_SRPT and AOTT_SRPT, but AOTT_SRPT in FIG. 22 describes search information only for AOTT. It's a table.

That is, in FIG.
Search pointer AOTT / ATT for only titles
_SRP is a category of the audio title ATT,
Including the number of programs in the audio-only title AOTT, the total playback time of the audio-only title AOTT, the number of the audio title set ATS, the title number of the audio title set ATS, and the start address of the audio title set ATS. There is.

By the way, the title group TT_GR can be specified in the control information of the reproduction title defined in the audio manager AMG.

This title group TT_GR is an aggregate of one or more audio titles ATT, and AT
It is defined as a unit that guarantees continuous reproduction of the T group. From the user's point of view, the audio title ATT corresponds to a “song”, and the title group TT_GR corresponds to an “album” as a collection of songs (see FIG. 9). In the same way as when the reproduction is started from the beginning or the middle of the album in the record or the CD, the reproduction can be continuously performed to the end of the album as it is. When the reproduction is started from the beginning or the middle ATT of the TT_GR, this TT is continued.
_GR can be played continuously until the end.

The following two types can be defined as the title group TT_GR.

<A1> Audio title group (A
TT_GR); this ATT_GR is a title group TT_GR composed of audio titles ATT defined in the audio title search pointer table ATT_SRPT.

<A2> Audio-only title group (AOTT_GR); this AOTT_GR is the audio-only title search pointer table A.
Title group TT_GR consisting of audio only title AOTT defined in OTT_SRPT
Is.

Audio title group ATT_GR
Is for a player (a player that handles both AOTT and AVTT) capable of reproducing audio and video of an audio standard, and an audio-only title group AOTT_GR is a player capable of reproducing only an audio of an audio standard (only AOTT). Player).

The audio title ATT has the following three types.

<B1> ATT has only AOTT <B2> ATT has only AVTT <B3> ATT has both AOTT and AVTT (here, AOTT and AVTT are the same song) However, in the case of <B1> described above, the search information for AOTT is described in both ATT_SRPT and AOTT_SRPT in the case of having both AOTT which is a version without image and AVTT which is a version with image. And FIG. 22).

In the case of <B2>, the search information for AVTT is described only in ATT_SRPT (FIG. 2).
0).

In the case of <B3>, the search information for AOTT is described only in AOTT_SRPT, and AV
The search information for TT is described only in ATT_SRPT (see FIG. 20).

FIG. 23 illustrates the relationship between <B1> to <B3>.

FIG. 23 shows a group AOTT_GR of audio only titles accessed by the audio only title search pointer AOTT_SRP in the audio manager information AMGI of FIG. 17, and an audio title search pointer ATT_SRP in the audio manager information AMGI. The relationship between the audio title group ATT_GR and the audio title group ATT_GR is illustrated. FIG. 23 shows ATT_SRPT and AOTT_.
It can be said that this is an example showing the relationship with SRPT.

In FIG. 23, the audio title AT
Each of T # 1 and # 9 is composed only of an audio title AVTT with video, and each of ATT # 2 and # 3 is composed of an audio title AVTT with video and an audio-only title AOTT, and ATT #
Each of # 4, # 5, # 7 and # 8 is composed of only the audio only title AOTT.

In the example of FIG. 23, nine audio titles ATT are used, and these are divided into four groups (G
R # 1 to GR # 4) and audio title group A
TT_GR is configured and divided into two groups (GR # 1 to GR # 1).
GR # 2) to form an audio-only title group AOTT_GR.

In this example, the audio title ATT #
1 and # 9 consist of AVTT only, and there is AOT
There is no T. Therefore, ATT # 1 and # 9 are audio-only title groups AOTT_GR.
Does not exist as

Therefore, the audio title group A
Generally, the number of TT_GRs (four in this example) and the number of audio only title groups AOTT_GR (two in this example) do not match.

What is required here is a player (AOTT and AVT) capable of reproducing an image and sound of an audio standard.
The sameness of the title group TT_GR is maintained when the ATT group is played back by a player handling both T) and when the ATT group is played back by a player capable of playing only audio of the audio standard (player handling only AOTT). Is.

That is, the corresponding ATT_GR and AOT
T_GR has the same AT even if the GR number is different.
It must be composed of Ts, and the order of ATTs in TT_GR must be the same. Otherwise, users will be confused. Of course, this means that the ATT (AVTT in FIG. 23 only has AVTT and no AOTT exists).
# 1 and # 9) are excluded.

In order to satisfy the above "necessity", "AO
A restriction may be added so that “ATT not defined as TT” and “ATT defined as AOTT” are not mixed in one ATT_GR. This allows ATT_G
In the part where both R and AOTT_GR exist,
The identity as TT_GR is maintained.

In the example of FIG. 23, GR # 2 of ATT and GR # 1 of AOTT, and ATT_GR # 3 and AOT.
T_GR # 2 is composed of the same ATT,
The order of ATTs in TT_GR is also the same.

FIG. 24 is a diagram for explaining the recorded contents of the audio title set (ATS) in the DVD audio zone of FIG.

The audio title set ATS includes audio title set information ATSI and audio object set AOT for audio-only title.
It is composed of T_AOBS and backup ATSI_BUP of audio title set information.

Audio title set information ATSI
Is an audio title set management table ATSI_
MAT and audio title set program chain information table ATS_PGCIT are included.

The audio title set program chain information table ATS_PGCIT includes audio title set program chain information table information ATS_PGCITI and audio title set program chain information search pointer ATS_PG.
CI_SRP and one or more audio title set program chain information ATS_PGCI are included.

FIG. 25 shows the recorded contents of the audio title set information management table ATSI_MAT shown in FIG.

That is, in the audio title set information management table ATSI_MAT, an audio title set identifier (ATSI_ID); an audio title set end address (ATS_EA); an audio title set information end address (ATSI)
_EA); version number of adopted audio standard (VERN); end address of audio title set information management table (ATSI_MAT_EA); start address of video title set VTS for audio-only title AOTT (VTS_SA); for audio-only title Start address of audio object set (AOTT_AOBS_S
A) or the start address (AOTT_VOB) of the video object set for audio-only title
S_SA); Start address of program chain information table for audio title set (ATS_PG
CIT_SA); Attributes of audio object set for audio-only title (AOTT_AOBS
_ATR) or attributes of the video object set for audio-only title (AOTT_VOBS_A
TR) # 0 to # 7; audio title set data mix coefficient (ATS_DM_COEFT) # 0 to # 1
5; Still picture attribute of audio title set (ATS
_SPCT_ATR); Other reserved areas are provided.

When the ATS does not have AOTT_AOBS in the start address VTS_SA of the VTS for AOTT, the VTSTT_ used for AOTT is used.
The start address of VTS including VOBS (FIG. 8) is written. When the ATS has AOTT_AOBS, "00000000h" is written in this VTS_SA.

At AOTT_AOBS_SA, AT
When S has AOTT_AOBS, the number of relative logical blocks from the first logical block of ATS gives AO
The start address of TT_AOBS is written. On the other hand, if the ATS does not have AOTT_ABOS, A
In OTT_VOBS_SA, the start address of VTSTT_VOBS is the VTS used for ATS.
It is written with the number of relative logical blocks from the first logical block of the VTS including TT_VOBS.

The above ATS_PGCIT_SA contains AT
The start address of ATS_PGCIT is written with the number of relative logical blocks from the first logical block of SI.

The above AOTT_AOBS_ATR or A
Eight OTT_VOB_ARTs, # 0 to # 7, are prepared. When the ATS has AOTT_AOBS, the attribute of AOTT_AOB recorded in the ATS is AO.
Written to TT_AOBS_ATR. On the other hand, ATS
, Does not have AOTT_AOBS, AOTT_V
The attribute of the audio stream in the VOB used for AOTT_VOB in the ATS is written in OB_ART. The adopted sampling frequency (44 to 192 kHz) and the number of quantization bits (16 to 24 bits) are written in the AOTT_AOBS_ATR or AOTT_VOB_ART.

The ATS_DM_COEFT indicates a coefficient when audio data having a multi-channel output (5.1-channel output) is mixed down to 2-channel output, and one or more AOTT recorded in the ATS.
Only used in _AOB. ATS is AOTT_AOB
When not having S, 16 (# 0 to # 15) ATs
"0h" for all bits of S_DM_COEFT
Is written. These 16 ATSs (# 0 to # 15)
The area for _DM_COEFT is constantly provided.

The ATS_SPCT_ATR is AOT.
The attribute of the still picture stream for each still picture in T_AOBS is shown. When there is no still image in AOTT_AOBS, "0000h" is set in ATS_SPCT_ATR.
Is written. Each field of this still picture is AO
It is adjusted to the information recorded in the video stream of each still picture in TT_AOBS.

Each ATS_SPCT_ATR is composed of 16 bits and consists of 2 bits (bits b15 to b1) on the MSB side.
4) represents a video compression mode (MPEG2, etc.), and the next 2 bits (bits b13 to b12) are the TV system (N.
TSC, PAL, SECAM, etc., and the next 2 bits (bits b11 to b10) are the aspect ratio (4:
3, 16: 9, etc., and the next 2 bits (bit b9-
b8) is a display mode (4: 3 display, 16: 9 display, letterbox display, etc. on a 4: 3 size TV monitor)
Is represented. The next 2 bits (bits b7 to b6) are reserved bits for future use. The next 3 bits (bits b5 to b3) represent the resolution of the still image (720 horizontal x 480 vertical in NTSC system, 720 horizontal x 576 vertical in PAL system, etc.). Last 3 bits on LSB side (bits b2 to b0)
Is also a reserved bit for the future.

FIG. 26 is a view for explaining the contents of the audio title set program chain information table ATS_PGCIT included in the audio title set information ATSI of FIG. 24 (the recording position of this ATS_PGCIT is ATS_PGCI of ATSI_MAT of FIG. 25).
Written to T_SA).

As mentioned above, this ATS_PGCIT is the audio title set program chain information table information ATS_PGCITI and the audio title set program chain information search pointer AT.
It includes S_PGCI_SRP and audio title set program chain information ATS_PGCI.

The above ATS_PGCI_SRP is one or more audio title set program chain information search pointers (ATS_PGCI_SRP # 1 to ATS).
_PGCI_SRP # j), and the ATS_PGC
I is the same number of program chain information (ATS_PGC) for audio title sets as ATS_PGCI_SRP.
I # 1 to ATS_PGCI # j).

Each ATS_PGCI functions as navigation data for controlling the reproduction of the audio title set program chain ATS_PGC.

Here, ATS_PGC is audio
AT is a unit that defines only title AOTT.
S_PGCI and one or more cells (cells in AOTT_AOBS or A used as an object of AOTT)
Cell in OTT_VOBS).

Each ATS_PGCI is the general information (ATS_P) of the audio title set program chain.
GC_GI), audio title set program information table (ATS_PGCIT), and audio title set cell playback information table (ATS_C_)
PBIT) is included.

The ATS_PGCIT is one or more audio title set program information (ATS_PGI).
# 1 to ATS_PGI # k), and ATS_C_
PBIT is the same number of audio title set cell playback information as ATS_PGI (ATS_C_PBI # 1 to AT).
S_C_PBI # k).

FIG. 27 shows the contents of the audio title set program information ATS_PGI of FIG.

This ATS_PGI is the contents of the audio title set program (ATS_PG_CNT).
And the entry cell number of ATS_PG (ATS_PG_
EN_CN), internal standard recording code (ISRC_SPCT) for still picture, and playback start time (FAC_ST_PTM) of the first audio cell in ATS_PG.
And the playback time of ATS_PG (ATS_PG_PB_T
M) and the pause time of ATS_PG (ATS_PG_P
A_TM) is included.

The ATS_PG_CNT is a description showing the relationship of the physical arrangement between the preceding program and the current program; a description showing the relationship of the reproduction time stamp between the preceding program and the current program; the attribute of AOB or ATS_PG. A description (ATRN) indicating the attributes of the audio stream in the VOB; and AOTT_AOB_ART or AOTT_VOB defined in ATSI_MAT
Description indicating the coefficient table number (DM_COEFT) for downmixing the AOB in the ATS_PG (AOB_PG) having the _ART number using the ATS_DM_COEFT number defined in ATSI_MAT.
N) and are included.

The above ATS_PG_EN_CN is ATS.
_PG number of the first ATS cell (1 to 25)
Up to 5) is included.

The above ISRC_SPCT is ATS_PG.
Internal Standard Recording Code (ISRC) for Still Picture in
Contains the description of. When there is no still image in ATS_PG, all bits of this ISRC_SPCT are “0”.
Is written.

The FAC_ST_PTM is the ATS_P
It includes a description of the lower 32 bits of the reproduction time stamp (or presentation time stamp PTS) described in the head audio packet of the first audio cell in G.

[0200] The ATS_PG_PB_TM is the ATS.
It describes the total playback time of each cell in _PG. This total playback time (seconds) is ATS_PG_
It is obtained as a value obtained by dividing PB_TM (32-bit data) by 90,000.

The ATS_PG_PA_TM is the ATS.
This is a description of the pause time that can be defined at the beginning of _PG. This pause time (sec) is ATS_P
It is obtained as a value obtained by dividing G_PA_TM (32-bit data) by 90,000.

FIG. 28 shows the contents of the audio title set cell reproduction information ATS_C_PBI shown in FIG.

This ATS_C_PBI is the index number (ATS_C_IXN) of the cell (ATS_C) of the audio title set and the ATS_C type (AT
S_C_TY) and ATS_C start address (A
TS_C_SA) and ATS_C end address (A
TS_C_EA).

ATT is A in ATS_C_IXN.
When it has no OBS, "01h" is written.

When ATT has AOBS, ATT_
Depending on the content of C, the content of ATS_C_IXN is as follows: * When ATS_C is the silent cell or picture cell described above, "00h" is written in ATS_C_IXN as the index number of this ATS_C; * When ATS_C is the above-mentioned audio cell, the index number of this ATS_C is ATS_C_
"1" to "99" are written in IXN.

The index number of the first audio cell in ATS_PG (the one having the smaller ATS_C except for picture cells and silent cells) is:
It is set to "1". Similar index number to AT
It may be appropriately assigned to one or more ATS_C in S_PG.

All bits of the ATS_C_TY are A
If the TT has no AOBS, "0" is written.

On the other hand, if ATT has AOBS, A
TS_C_TY contains the configuration of ATT_C (ATS_C_TY).
COMP) and its use (ATS_C_Usage)
Is written.

[0209] That is, if the corresponding cell is an audio cell consisting of audio data only, ATS_C_C
"00b" is written in OMP (2 bits); ATS_C_COMP (2 if the corresponding cell is an audio cell including audio data and real-time information.
"01b" is written in (bit); if the corresponding cell is a silent cell consisting only of audio data for silence, "10b" is written in ATS_C_COMP (2 bits).
Is written; if the corresponding cell is a picture cell composed of only still picture data, "11b" is written in ATS_C_COMP (2 bits).

In ATS_C_Usage, data indicating the use such as a "spotlight section" for making a particular portion of the audio manager menu AMGM visible (spotlighting) stand out (0001)
b) is written.

When the ATS has AOTT_AOBS,
In the above ATS_C_SA, A in which ATS_C is recorded
The start address of ATS_C represented by the relative logical block number from the first logical block of OTT_AOBS is described.

On the other hand, when the ATS does not have AOTT_AOBS, the start address of ATS_C represented by the relative logical block number from the first logical block of AOTT_VOBS in which ATS_C is recorded is described in ATS_C_SA.

When the ATS has AOTT_AOBS,
The ATS_C is recorded in the ATS_C_EA.
The end address of ATS_C represented by the relative logical block number from the first logical block of OTT_AOBS is
Described.

On the other hand, when the ATS does not have AOTT_AOBS, the end address of ATS_C represented by the relative logical block number from the first logical block of VTSTT_VOBS in which ATS_C is recorded is described in ATS_C_EA.

FIG. 29 is a block diagram showing an example of an apparatus for reproducing the recorded information of the audio zone of FIG. 3 or the recorded information of the video zone of FIG. 4 from the optical disc (DVD audio disc) of FIG. This playback device is a DVD video player capable of playing video as well as audio.
It has the structure of a DVD audio compatible player. (Although description of a specific configuration is omitted, this player may be compatible with existing CD reproduction.) The optical disc reproducing apparatus of FIG. 29 receives a remote controller 5 that receives a user operation, and an operation status of the remote controller 5. Remote controller receiver 4A,
A key input unit 4 for accepting a user operation on the reproduction apparatus main body side, and a panel provided on the reproduction apparatus main body (and / or remote controller) for notifying the user of the operation result by the user, the reproduction status of the DVD audio disc 10, and the like. The display unit 4B is provided. Other external devices include the monitor unit 6 and the speaker unit 8L /
8R is prepared. (The illustrated speaker unit is a case of two-channel stereo, but when performing multi-channel reproduction, a required number of speaker systems and their drive amplifiers are separately prepared.) Key input unit 4, panel display unit 4B, The remote controller 5 and the monitor unit 6 form a visual user interface. The monitor unit 6 is used not only as a playback video monitor of a DVD audio disc with a still image but also as a display means such as an on-screen display OSD. The monitor unit 6 is not limited to the direct-view CRT display, the liquid crystal display, and the plasma display, and in addition to the direct-view display, various images including the OSD information on the large screen (menu screen, recording site situation). It may be a video projector for projecting a still image obtained by capturing the image.

User operation information from the remote controller 5 is notified to the microcomputer (MPU or CPU) 500 of the system control unit 50 which controls the operation of the entire reproducing apparatus via the remote controller receiving unit 4A. The control unit 50 also includes a ROM 502 that stores a control program and the like executed by the MPU 500.

The user operation information from the key input unit 4 is M
The PU 500 is directly notified. By the MPU 500, the operation status (various setting statuses and DVD disc playback information) of the playback device corresponding to the user operation information is appropriately displayed on the panel display unit 4B.

A RAM 52 and a memory interface (memory I / F) 53 are connected to the MPU 500. Input / output control of the RAM 52 is performed by the memory I / F 5
3 through 3. The MPU 500 uses the RAM 52 as a work area, and based on various processing programs stored in the ROM 502, the disk drive unit 3
0, system processor 54, video decoder 58,
It controls the operations of the audio decoder unit 60, the sub-picture decoder unit 62, and the D / A conversion / reproduction processing unit 64.

The disc drive section 30 rotationally drives the disc 10 set in the tray of the reproducing apparatus main body (inside the DISK / TRAY / INLET in FIG. 30), and records data (including voice / music information) from the disc 10. In addition to audio data, if recorded on the disc 10, main video data / video data including moving picture information / still picture information, sub-picture data including caption information / menu information, etc.) are read out. The read data is subjected to signal processing such as signal demodulation and error correction in the disk drive unit 30, and is sent to the system processor unit 54 as a pack format data string (see FIGS. 6 to 8).

The system processor section 54 includes the disk 10
It has a packet transfer processing unit (not shown) that determines the types of various packets included in the data reproduced from the packet and delivers the data in the packet to the corresponding decoders (58 to 62). .

The packet transfer processing unit uses the pack format data string from the disk drive unit 30 for each pack type (navigation pack, video pack, sub-picture pack, audio pack, real-time information pack, and still picture pack). Cut into pieces. Transfer data and ID data indicating the type of data are recorded in each of the separated packs.

The system processor section 54 refers to the transfer time data and the ID data to obtain the video pack, the sub-picture pack, and the video pack, respectively.
The data is transferred to the video decoder unit 58, the sub-picture decoder unit 62, and the audio decoder unit 60. The still picture pack is sent to the video decoder unit 58. The audio pack or the real-time information pack corresponding to the silent cell is sent to the audio decoder unit 60.

Further, the system processor unit 54 transfers the control data in the navigation pack to the RAM 52 via the memory I / F 53. The MPU 500 refers to the transferred control data in the RAM and controls the reproduction operation of each unit of the reproduction apparatus main body.

The video decoder section 58 is an MPEG in the video pack transferred from the system processor section 54.
The encoded video data is decoded to generate video data before compression.

The sub-picture decoder section 62 decodes the run-length compressed sub-picture data in the sub-picture pack transferred from the system processor section 54 to generate bit-compressed sub-picture data before compression.

The sub-picture decoder section 62 includes a sub-picture decoder for decoding the sub-picture data from the system processor section 54, as well as a highlight processing section (in the case of DVD video) for the decoded sub-picture data. Are provided (not shown).

The sub-picture decoder has a predetermined bit (2 bits) which is run-length compressed according to a predetermined rule.
The unit pixel data (including emphasized pixels, pattern pixels, background pixels, etc.) is expanded to restore the original bitmap image.

The highlight processing unit (not shown) is MP
XY indicating a rectangular area in which highlight information (for example, menu selection item) supplied from U500 is displayed
Corresponding highlight processing is performed according to the coordinate value, the color code, and the highlight color / contrast value.

In this highlighting process, in the visual user interface on the monitor unit 6, the user selects a specific item displayed (a specific item such as the type of the reproduced voice language or the type of the used language of the reproduced subtitle). Button to do;
Alternatively, it can be used as a means for easily recognizing a sampling frequency of reproduced sound, a button for selecting a specific item such as the number of quantization bits, the number of reproduced channels, or the like.

When the color and contrast of each pixel of the decoded sub-picture data is changed according to the highlight information, the changed sub-picture data is converted into the video processor section 64.
It is supplied to the image synthesizing unit (not shown) in 0. In this image synthesizing unit, the decoded image data and the highlighting sub-picture data are synthesized, and the synthesized image is displayed on the monitor unit 6.

The RAM 52 described above is a sub-picture menu,
It includes a menu table that stores start addresses for audio menus, angle menus, chapter (program) menus, and the like. The highlighting process is used to highlight specific parts of these menus.

The audio decoder section 60 decodes the audio data in the audio pack transferred from the system processor section 54, and generates monaural, 2-channel stereo or multi-channel stereo audio data. When the audio data in the audio pack is compression-encoded data (MPEG, AC-3, etc.), the decoding process is also executed inside the audio decoder unit 60.

The video data (usually a moving image signal) decoded by the video decoder section 58 and the sub-picture decoder section 6
The sub-picture data (usually subtitles or menu bitmap data) decoded in 2 is processed by the video processor unit 6
40. In the video processor unit 640, the video data and the sub video data are mixed at a predetermined ratio, and the final analog video signal (composite video signal, separate S signal, or component signal Y
/ Cr / Cb) and output to the monitor unit 6.

When the video data decoded by the video decoder 58 is the main part of the movie on the DVD video disc 10, the sub-picture data is usually subtitles in the language selected by the user, and the main movie with subtitles is monitored. It will be performed in Part 6.

When the video data decoded by the video decoder unit 58 is the menu portion of a movie, the sub-video data is usually the characters that make up the menu and the user selection button (which is appropriately highlighted). in this case,
Menu background (still image or video) depending on video data
Is displayed on the monitor unit 6, and a button whose display changes according to the user selection operation by the sub-picture data is displayed so as to overlap the background image.

On the other hand, when the video data decoded by the video decoder unit 58 is a still image of the DVD audio disc 10, the sub-video data is, for example, an explanatory text in the language selected by the user, and in that case, the text is included. The still image is displayed on the monitor unit 6.

The video processor section 640 includes an OSD section for generating display data for the on-screen display. A user operation from the remote controller 5 or the like is processed by the MPU 500, and the processing result is the MPU 5
00 to the OSD section of the video processor section 640. The OSD section generates image data corresponding to the processing result from the MPU 500 and sends it to the monitor section 6 in an analog video signal format.

In other words, the video processor unit 6
It can be said that 40 is a portion for converting the digital signals output from the video decoder section 58 and the sub-picture decoder section 62 into analog signals and multiplexing them.

A frame memory unit 642 is connected to the video processor unit 640. The frame memory unit 642 is used not only for multiplexing the image of the video data and the image of the sub video data but also for n-division (for example, 4-division) multi-screen display.

When a chapter search or the like is performed, the frame memory unit 642 fixes a part of the image from the video decoder unit 58 as a still picture, and monitors the still picture until the reproduction of the target chapter starts. It can be used when sending to.

Further, the frame memory unit 642 is
When the display corresponding to the user operation result is performed by the OSD, it can be used also when the OSD display is multiplexed with the video data.

The audio data decoded by the audio decoder section 60 is transferred to the DAC / output circuit 644. The DAC / output circuit 644 converts the audio data (digital) from the audio decoder section 60 into a corresponding analog audio signal, amplifies it appropriately, and sends it to the speaker section 8L / 8R.

ATS_DM in the audio title set information management table ATSI_MAT described in FIG.
When multi-channel audio is downmixed into two channels based on the writing of _COEFT, the coefficient (parameter) of the downmix is from MPU500 to DAC.
-Sent to the output circuit 644. Then, the DAC / output circuit 644 mixes down the multi-channel audio data decoded by the audio decoder unit 60 into two channels based on the received coefficient, and outputs a two-channel analog audio signal.

The video processor unit 640, the frame memory unit 642 and the DAC / output circuit 644 are D / A
The conversion and reproduction processing unit 64 is configured.

The system processor unit 54, the video decoder unit 58, the audio decoder unit 60 and the sub-picture decoder unit 62 respectively receive a system time clock (STC) for knowing the operation timing and a command / information from the system MPU 500. Includes temporary storage registers.

FIG. 30 shows an example of the front panel of the reproducing apparatus shown in FIG. The front panel is provided with a fluorescent display section (FL display) 4B corresponding to the panel display section 4B in FIG.

AM is displayed on the FL display 4B of FIG.
GI Audio Text Data Manager ATXTD
According to T_MG, the album name and / or the group name are displayed in characters. In the example of FIG. 9, "Beethoven Works Vol. 1" is displayed as the album name,
As the group name, for example, "Symphony No. 1" is displayed.

Further, a title number (in the case of DVD video) or a group number (in the case of DVD audio), a track number, and an index number are displayed on the left side numerical display portion of the FL display 4B.

When the optical disc 10 set in the disc tray of FIG. 30 is an AV disc (see FIG. 20)
In the character display portion on the right side and slightly in the center of the FL display 4B, the "AV disc" portion is conspicuously displayed, as shown in the figure. When the set disc is an A disc (a disc having AOTT_SRP in FIG. 22), the "A disc" portion is conspicuously displayed on the right character display portion of the FL display 4B. When the set disc is a VTS-only video disc that does not have ATS (a disc that does not have an ATS directory in FIG. 12), the "video disc" portion is conspicuously displayed on the right character display portion of the FL display 4B. It

[0250] Furthermore, the sampling frequency and the number of quantization bits of the audio content to be reproduced are displayed on the right side numerical display portion of the FL display 4B. This display is AOTT_AOB_ATR in the audio title set information management table ATSI_MAT.
Alternatively, it can be automatically executed based on the contents of AOTT_VOB_ART.

By the way, a DVD audio disc (A
There are the following two types of DVD audio players for reproducing a disc or an AV disc 10.

<C1> A player capable of reproducing pictures and sounds of the audio standard, that is, a player handling both AOTT and AVTT.

<C2> A player capable of reproducing only the sound of the audio standard, that is, a player handling only AOTT.

The <C1> type player only needs to read the search information (FIG. 20) described in the ATT_SRPT for content reproduction.

On the other hand, the <C2> type player is
In order to reproduce the content, only the search information (FIG. 22) described in AOTT_SRPT needs to be read.

In this way, the reproduction method for each type of player becomes simple. As a matter of course, the <C2> type player cannot reproduce the ATT # 1 and # 9 portions in FIG. 23 because there is no AOTT.

The DVD audio player shown in FIG. 29 is the <C1> type player. The operation of this player is performed by the disc 10 having the data structure shown in FIG.
The case of reproducing is described.

When the disc 10 having the data structure shown in FIG. 14 is played back by a normal DVD video player, this video player uses the VTS under the root directory shown in FIG.
The VMG in the directory is read, and the title to be played back is determined based on that information. Then, according to the instruction of the reproduction unit defined in the VTS corresponding to the decided title, the object set VOBS # in FIG.
1 or VOBS # 2 is partially or completely reproduced.

In the data structure of FIG. 14, the video player recognizes a portion other than VMG, VTS # 1 and VTS # 2 as another recording area 73 (FIGS. 3 and 4). Therefore, no matter what data is described in the portion recognized as the other recording area 73, it does not affect the operation when the video player reproduces VOBS # 1 and VOBS # 2. In this case, the object existing in the other recording area 73 cannot be reproduced by the video player.

On the other hand, when the disc 10 having the data structure shown in FIG. 14 is reproduced by the DVD audio player shown in FIG. 29, the audio player reads the AMG in the ATS directory under the root directory shown in FIG. Play content based on. AMG
In the title designation by, the playback unit defined in the ATS recorded in the DVD audio zone 71 (FIG. 3) is defined, and also in the VTS recorded in the DVD video zone 72 (FIG. 4). The specified playback unit can also be designated.

The playback unit defined in the ATS is D
In addition to designating the reproduction path of the object (AOBS # 1 or AOBS # 2) recorded in the VD audio zone 71, reproduction of the audio data recorded in the object (VOBS # 1) of the DVD video zone 72 is performed. It is also possible to specify the route.

VOBS # marked with diagonal lines in FIG.
1 exemplifies a part of a DVD video shared from the DVD audio side. Here, the arrow (a) indicates the case where the playback unit in the video zone 72 is referenced,
The arrow (a) indicates the case where the audio unit of the object (VOBS # 1) in the video zone 72 is referenced from the reproduction unit in the audio zone 71.

Objects in the video zone 72 (VOB
When the audio part of S # 1) is referred to by the playback unit of the audio zone 71, this common reference part (the part shared by the DVD audio and the DVD video) is defined by the playback unit definition information (ATSI). It is also possible to make a definition different from each unit (cell, program, program chain) defined by the definition information (VTSI) of the reproduction unit in the zone 72. This is because the reproduction method as a video player and the reproduction method as an audio player may be different even for the same object (FIG. 5).
reference).

The shared portion is used with the video object unit VOBU as a unit. The reason is that, as shown in FIG. 8, the units in which the audio data stream and the other (video, sub-picture) data streams are packed and time-division multiplexed are
This is because it is VOBU.

As shown in FIG. 14, the audio zone 7
By arranging 1 physically ahead of the video zone 72, it is possible to limit all the addresses of the reproduction units designated by the respective management information to only the forward addressing. By doing so, the design and development of the audio player can be simplified.

The operation of the video player in the data structure shown in FIG. 16 is the same as that in the case shown in FIG.

The operation of the audio player in the data structure of FIG. 16 is almost the same as that of the case of FIG. The audio player jumps to the beginning of AMG to read the management information, and sets the object sets AOBS # 1 and AOBS # 2.
To play. Although AOBS # 1 is an object in the DVD video zone, AOBS # 1
The # 1 cell, program and program chain are redefined. AOBS # 1 is also used in units of VOBU.

In the above-described embodiment, the DVD audio data and / or the DVD audio data included in the volume space 28 are recorded.
Alternatively, the case has been described where the DVD video data is recorded on the optical disc 10. However, the data structure of the present invention (FIGS. 3 to 28) is not limited to being recorded on the optical disc 10. For example, a bit stream containing data having the structures shown in FIGS. 3 and 12 may be digitally broadcast or digitally communicated. (In this case, the radio wave or the communication line functions as a medium. Further, the communication terminal such as the DVD broadcast receiver or the personal computer functions as the DVD audio player.) As described above, the system to which the present invention can be applied is general. Although it has been described above, the points particularly claimed in the present invention will be collectively described below.

The point is that the cell structure of the DVD audio is characterized. First, DV
There are the following two types of D audio depending on the type of data to be handled.

[A-1] Audio with Video (Audio wi
th Video): A system that handles both audio data and image data.

[A-2] Audio without Video (Audio with
out Video): A system that handles only audio data and not image data. Is.

The above-mentioned [A-1] type data structure is basically equivalent to the above-mentioned DVD standard. The present invention is concerned with the data structure of the above-mentioned [A-2] type audio. The disc for the DVD audio system has the structure as described above. The entire one side of the disc is defined as a volume. The title group (TT_GR) is a constituent element of a volume and is composed of one or more audio titles (ATT). T
T_GR is an album that is called a record or a CD. The continuity of reproduction is guaranteed for a track group in one TT_GR.

There are the following two types of ATT. That is, [B-1] Audio with Video Title (AVTT): a title composed of audio data and image data. [B-2] Audio Only Title (AOTT): a title composed of only audio data. The general term for AVTT and AOTT is ATT. As described above, since the present invention is directed to the [A-2] type data structure, the AOTT will be described below. One AOTT is formed by one PGC. More specifically, as shown in FIG. 3, one A
The OTT is the program chain information (ATS) in the ATS.
_PGCI) and one or more cells (Ce) of the corresponding audio object set (AOBS) in the ATS.
ll). A track (Track) is a program (PG) defined in PGC. One track (Track) is composed of one PG. The track is composed of one or more cells.

[0274] Generally, in audio content, a track is used as a song, and a cell is used as one unit for delimiting the numbers in the song. Playback of audio contents is defined by specifying the playback order of cells.

[0275] The following specifications are required for the above-mentioned [A-2] type audio data structure. [C-1]… One still picture (Still picture) can be played as an option for each track (Track) playback. [C-2]… Audio data attributes for each track (Track) It can be set.

Regarding [C-1]: In the above description of the [A-2] type, it is described that “only audio data is handled, image data is not handled”, but one still track per track (Track) It is a necessary specification that a picture (still picture) can be added as an option. When a track with still picture data (Track) is played back by an audio player having a video output function, a still image is output together with audio output. When a track (Track) without still picture data is played back with an audio player, a still image is not output, and when a track (Track) with still picture data is played back with an audio player that does not have a video output function, The still image data is not output by skipping or ignoring the data of the still image.

Regarding [C-2]: In the music CD, the attributes (sampling frequency: fs, quantization bit number: Qb, etc.) of each song in one album are all the same. However, DVD
For audio, attributes can be set for each song in order to increase the flexibility of the sound source. That is, the content provider can set attributes for each track (Track). Attributes for each track in DVD audio include, for example, sampling frequency, number of quantization bits, channel assignment, and downmix coefficient.

As described above, when the player reproduces the audio data satisfying the specifications of the items [C-1] and [C-2], the problem of sound interruption occurs at the start of the reproduction of the track (Track). However, when viewed as content, the sound cutoff time should be managed according to the creator's intention, and as described above, the sound cutoff time length is different for players with and without video playback functions. Should be the same. Therefore, the present invention provides a data structure that allows the producer to set the duration of sound interruption by himself, and the player recognizes the presence or absence of sound interruption in advance in the reproduction procedure defined by the creator. ,
Moreover, it provides a data structure for realizing the setting of the sound break time length specified by the creator.

[0279] First, a still image must be continuously reproduced from the beginning to the end of one song. Therefore, the player needs to read the still image data before reading the audio data of one track (Track). Therefore, the head of a cell group that constitutes one program on the program chain must be a cell of still picture data.

Here, if the audio data and the still image data are multiplexed according to the MPEG program stream standard and the data is recorded, the previous reading is not necessary, but in order to realize high quality audio, the audio data Since it is necessary to maximize the bit rate, even if audio data with a low bit rate is multiplexed in the still picture section, the attributes of the still picture section and the attributes of the audio data following the still picture section (bit rate, etc.) Since there is a difference, sound breaks will occur at the transition. Furthermore, since multiplex actually takes the form in which fixed-length still image data packs are mixed in the audio data pack sequence, a large still image data is the same as a long mixing period. Become. Therefore, the time at which this sound break occurs depends on the size of the still image data, making it difficult to control the time of occurrence. In order to prevent such a problem from occurring, still image data is recorded independently.

For example, in continuous playback, a track (Track
) To a new track with still picture data (T
When the playback transitions to rack), the still picture data is read first, and during that time, the audio data reading is stopped and the playback sound is interrupted.
Further, when a track (Track) with a still image and a track (Track) without a still image coexist in one title group (TT_GR), this sound interruption may or may not occur during the reproducing operation.

[0282] The above-mentioned sound interruption occurs even when the attributes of the two tracks (Track) that undergo reproduction transition are different.
That is, if the player is playing a track (Track) having a certain attribute and the next track (Track) to be played back has a different attribute from the previous track (Track), the player plays the various tracks in terms of its hardware. Settings (buffer settings affected by differences in the number of quantization bits, clock (sampling) frequency settings, channel number settings, etc.)
Since the data transfer is stopped during this period, the sound interruption also occurs. Naturally, this sound break does not occur when the attributes of the two tracks (Track) that are transitioned in reproduction are the same. Therefore, as in the above case, there may be cases where sound breaks occur or not in one title group (TT_GR).

Since this sound break is caused by a physical cause, it cannot be eliminated by an application level data structure. Therefore, in this system, the existence of the above-mentioned sound interruption is positively recognized, and the content provider
We are building a data structure that can manage the duration of sound breaks. As a result, it is shaped so that the user does not feel unnatural during playback.

To solve this problem, the cell type is first defined as follows.

[D-1] Audio Cell: Audio Cell (A_
C): Cell consisting of general audio data.

[D-2] Silent Cell (S
I_C): A cell composed of audio data containing only silence.

[D-3] Still picture cell: Still pictur
e Cell (SPCT_C): Cell consisting of still image data.

Then, data identification information for identifying the cell contents is added to the cell information to enable identification of these three types of cells. Here, silence means audio data with zero amplitude level, not audio data.

FIG. 31 shows the classification structure of the above three cell types.

Audio data cell audio (A_
C) does not include still image data. The silent cell (SI_C) corresponds to a special case in the audio data cell, and the audio data is all silent.
Silent cells are used to set and manage the duration of silence. The still picture cell (SPCT_C) is
It is used for still image data transfer and does not include audio data.

One ATS_PG is one or more ATSs.
_C. Here, ATS_PG corresponds to a track and ATS_C corresponds to a cell.

FIG. 32 shows ATS_C in ATS_PG.
The three types of arrangement are shown. That is, [E-1] ... ATS_PG is composed of only A_C.

[E-2] ... The first cell of ATS_PG is
SI_C, and A_C is arranged side by side in all cells from the second onward.

[E-3] ... The first cell of ATS_PG is
SPCT_C, the second cell is SI_C,
All cells from the third cell onward are composed of A_C.

Further, all ATS_Cs constituting one ATS_PG are constructed so as to satisfy the following conditions.

[F-1] ... All ATS_Cs constituting one ATS_PG are physically consecutively arranged.

[F-2] ... Presentation time stamps (PTS) of all ATS_Cs constituting one ATS_PG are continuous.

[F-3] At least one A_C exists in one ATS_PG.

[F-4] The presentation time of one A_C is 1 second or more.

[F-5] ... The audio attributes of all SI_C and A_C groups constituting one ATS_PG are the same.

[F-6] The presentation time of one SI_C is 0.5 seconds or more.

[F-7] If one track (Track) has still image data, the still image recorded in SPCT_C is output during the audio gap (Audio Gap) period.

[F-8] The length of the audio gap generated for transferring the still image data is 0.5 to 0.6 seconds. In this DVD audio, the above audio gap is defined. This also means that the length of the audio gap period is set to an integral multiple of one audio frame time length.

FIG. 33, FIG. 34, FIG. 35, and FIG. 36 show AOTT_ in advance for the definition of the audio gap.
It is a figure explaining AOB and AOTT_AOBS. In the figure, A_PAK is an audio pack, RT
I_PAC means a real-time information pack.

As described above, the target title is the AOTT of the type described in item [B-2], and therefore the audio object that is the substance of the data is the audio object (Audio Object) for the audio-only title. Object for AudioOnly Title (AOTT_AO
B)). AOTT_AOB is one or more ATS_
CTS, and each ATS_C is composed of a pack group.

The data contained in AOTT_AOB is audio data and still image data. The audio data includes voice data of silence (which means that the amplitude level is zero as described above), and as a special example, some non-image additional data such as text data (this is called Real Time Information). Data) will also be included in the form of RTI pack.

AOTT_AOB must contain audio data, and the attributes of audio data in one AOTT_AOB must all be the same. Still image data is optionally included in AOTT_AOB, and still images included in one program (PG) must be output before the audio data in the program is reproduced.

One AOTT_AOB is "The system p
It is a program stream described in "art of the MPEG-2 standard (ISO / IEC 13818-1)" or a part thereof. AOTT_AOBS is an aggregate of AOTT_AOB. As defined in [D-1] to [D-3],
The following three types are defined as cells in one AOTT_AOB.

[G-1] Audio Cell (Audio Cell (A
_C)) consists only of a pack group of audio data (see FIG. 33), or a pack group of audio data and a pack group of additional non-video data (RTI data) (see FIG. 34), and its presentation. The presentation time is 1 second or more.

[G-2] Silent Cell (S
I_C)) is composed of an audio data pack group containing only silence (see FIG. 35) and is used for setting the silence period. The presentation time of one SI_C is 0.5 seconds or more.

[G-3] Still picture cell (Still pict
The pure cell (SPCT_C) is composed only of a pack group of still image data (see FIG. 36), and the still image recorded in SPCT_C must be output during the audio gap (Audio Gap) period.

Here, due to the above conditions [G-3] and [F-1], SPCT_C exists only as the first cell in one PG (see FIG. 36).

By the way, the audio gap (Audio Ga
p) is the period during which the audio stream transfer is discontinuous in one AOB, and its length is between 0.5 seconds and 0.6 seconds. This audio gap is defined as follows.

[H-1] A program (PG) having SPCT_C and a program (PG) immediately before it
The relationship between two PGs belongs to the same AOTT_AOB.

-Two PGs are physically arranged consecutively.

The attributes of the two PGs are the same.

If all three conditions such as
Audio gap period = "SI following SPCT_C
_C PTS value of the first audio frame "-" PTS value of the last audio frame of the previous PG "-
"One time of audio frame" [H-2] If the relationship between a certain PG with SPCT_C and the PG before it does not satisfy any of the above three conditions [H-1] , Audio gap period = "SI following SPCT_C
_C PTS value of the first audio frame "-" S
SCR value of first pack of PCT_C ”PTS is included in the pack header of each audio pack. Then, when the audio data in the audio pack is decoded, the PTS is used to obtain the timing of data output when the system clock inside the device and the PTS are matched.
The system clock reference (SCR) is PG
It is included in the pack header at the head of, and when this SCR arrives, the reference clock inside the device is set.

[0318] During the period in which the audio stream transfer is discontinuous, there is no reference data for defining the reproduction time. Therefore, the time length of that period is defined alternatively by the audio gap time. This is for maintaining the continuity of the reproduction time in a pseudo manner.

Next, a method of inserting the audio gap will be specifically described. First, the following four cases can be considered as the relationship between two adjacent PGs on the PGC.

[I-1] The PG does not have SPCT_C, and the PG and the previous PG have the same attribute.

[I-2] The PG does not have SPCT_C, and the PG and the previous PG have different attributes.

[I-3] The PG has SPCT_C,
In addition, when the above three conditions [H-1] are all satisfied.

[I-4] The PG has SPCT_C,
In addition, if any of the above three conditions [H-1] is not satisfied.

It is

The PG describes PG information for defining the attributes of audio data of the cells inside the PG, the temporal relationship with the previous PG, and the like. Contents and cell structure of PG
(Playback order) By recognizing the information, the above items [I-1] to [I
The four states of [-4] can be easily recognized by the player.

FIGS. 37 to 40 show the relationship between the PTS, the reproduction time and the audio gap (Audio Gap) in two adjacent PGs in the above four cases.

FIG. 37 shows the case of the above item [I-1]. (A), (b), and (c) of the figure show the arrangement (PG) of audio packs on the track, the value of the presentation time stamp, and the elapsed playback time. In this case, continuous transfer of the audio data stream is maintained, and the continuity of audio reproduction is also maintained.
There is no audio gap. PTS is reset at the beginning of PG.

[0328] In this case, the first cell of PG is SI_C.
However, the situation is the same in this case as well. This is because SI_C is one type of audio cell and is only a special case where all audio data have an amplitude level of zero.

FIG. 38 shows the case of the above item [I-2]. (A), (b), and (c) of the figure show the arrangement (PG) of audio packs on the track, the value of the presentation time stamp, and the elapsed playback time.
In this case, continuous transfer of the audio data stream is maintained and no audio gap occurs. However, it is necessary to reset the hardware when switching attributes, so audio playback becomes discontinuous during that time.

[0330] In this case, the content creator can manage the time interval "the time without sound" by setting the first cell of PG to SI_C. That is, the content creator can set the time interval of "no sound" as he or she desires by setting the length of SI_C (0.5 seconds or more).

37 and 38, PTSs between adjacent PGs are drawn discontinuously. In both cases, the audio data stream itself is continuous, so PT
S may be continuous.

FIG. 39 shows the case of the above item [I-3]. (A), (b), and (c) of the figure show the arrangement (PG) of audio packs on the track, the value of the presentation time stamp, and the elapsed playback time.
In this case, since SPCT_C exists, the transfer continuity of the audio data stream is not maintained and an audio gap occurs. This audio gap length is from the previous item
It is defined as described in [H-1].

In this case, of course, the audio reproduction is discontinuous, but the sound break time (silence time) should be managed by SI_C placed next to SPCT_C as in the case of the above item [I-2]. You can

FIG. 40 shows the case of the above item [I-4]. (A), (b), and (c) of the figure show the arrangement (PG) of audio packs on the track, the value of the presentation time stamp, and the elapsed playback time.
Also in this case, since SPCT_C exists, the transfer continuity of the audio data stream is not maintained and an audio gap occurs. The audio gap length is defined as described in [H-2] above. The management of the sound break time is the same as in the case of the above item [I-3].

The relationship between a player (playback device) for playing a disc having the above-described data structure, an audio gap, and a special cell will be described.

In this system, when SPCT_C is present,
The operation is the same in a player having a video reproducing function and a reproducing apparatus not having the same. That is, the sequence of data reading in either reproducing apparatus is the sequence of SPCT_C still image data, SI_C audio data, and A_C audio data. A playback device that has a video playback function decodes still image data and outputs a still image, and a playback device that does not have a video playback function simply ignores the still image data. Therefore, the sound break time lengths of both reproducing apparatuses are the same, and are determined by the audio gap length and the presentation time length of SI_C.

The three types of cells described above are systematically shown as follows.

In FIG. 41, the audio zone is composed of an audio manager file (AMG) and an audio title set (ATS) file. The audio title set (ATS) includes audio title set information (ATSI), audio only title / audio object set (AOTT_AOB).
S) and a backup of audio title set information (ATS_BUP).

Audio title set information (ATS
I) is composed of files of an audio title set information management table (ATS_MAT) and an audio title set program chain information table (ATS_PGCIT).

This ATS_PGCIT is audio title set program chain information table information (A
TS_PGCITI), audio title set program chain information search pointer (ATS_PGCI)
_SRP) and audio title set program chain information (ATS_PGCI).

ATS_PGCI is audio title set program chain general information (ATS_PGCI).
_GI), audio title set program information table (ATS_PGIT), audio title set cell playback information table (ATS_C_PBI)
T) of each file.

Audio title set cell playback information (ATS_C_) described in each audio title set program chain (ATS_PGC)
Some items are set as variables in PBI). This variable is the audio title set cell type, that is, ATC_C_TY (= ATS Cell Type). Then, the audio cell (A_C) [J-2] whose audio cell is composed only of [J-1] audio data and the empty audio cell A_C] [J-3] which is empty audio data and has no amplitude level. Silent cell consisting of only (SI_C) [J-4] It specifies which of the still picture cells (SPCT_C) consisting of only still picture data.

Also, the variable ATC_C_IXN (Index num
ber of ATS Cell) is SI_C or SP
When it is CT_C, specify it as '00h'. The cell is A_
If it is C, the index number of that cell (from '1' to '9
Specify 9 ').

Since the reproducing device can know the type of each cell from these information, it can recognize the presence or absence of sound interruption in advance.

As described above, the present invention has the following effects.

First, as the specifications of DVD-Audio,
One still image can be optionally added to one track, and audio attributes can be specified for each track. The resulting problem is sound interruption, which is that audio data transfer is interrupted during still image data transfer, and audio output is interrupted for the time required to reconfigure the hardware environment of the playback device due to audio attribute changes. Is the cause.

In order to solve this, three types of cells (A_C,
SI_C, SPCT_C) was defined, the arrangement order was limited, and the audio gap time (time when audio stream transfer was interrupted) was defined.

By introducing such a concept, the content creator can actively manage and set the sound interruption time. For example, when a track with sound interruption and a track without sound interruption are mixed, By placing a silent cell at the beginning of the unbroken track, the time without sound can be standardized on all tracks.
By mixing the presence / absence of sound interruptions, it is possible to prevent the user from feeling unnatural.

Further, according to the present invention, in order to cause the reproducing apparatus to perform various reproducing operations, in order to make the operations smooth and natural, the following concepts of time information and management information thereof are incorporated. ing.

Now, considering the relationship between the reproducing operation of the reproducing apparatus and the time information, the following types can be listed.

[0351] As time information required when the user causes the playback device to perform playback operation, [K-1] playback time of one track (Track) as a whole [K-2] playback of one title group (TT_GR) as a whole Time [K-3] Play from the beginning of the track (Track) of the point (point) you are listening to Elapsed time [K-4] Play from the beginning of the title group (TT_GR) of the point (point) that you are listening to Elapsed time [K-5] Remaining playback time as the track (Track) to which the currently listening point (point) belongs [K-6] Of the entire title group (TT_GR) at the currently listening point (point) Remaining Play Time [K-7] Start point (poin) of a track (Track)
t), playback time from the beginning of the title group (TT_GR) Next, the time required for the playback device to search for the jump destination point specified by the user, and the address (address)
When the elapsed playback time from the beginning of the [K-8] track (Track) is specified as the correspondence information with, the address of that point (point) [K-9] from the beginning of the title group (TT_GR) When the elapsed playback time is specified, there is the address of that point.

[Solution] As management information used for recognizing the above-mentioned time information and address, management data of the following reproduction time and address is added to the DVD audio.

That is, as shown in FIGS. 41 and 42, in addition to the management data described above, management data as described in the following items [L-1] to [L-9] is provided.

[L-1] ATS_PGC_PB_TM in ATS_PGC_GI: Audio title set program chain playback time described in the audio title set program chain general information.

[0355] This information, that is, ATS_PGC Playback time
The content of (ATS_PGC_PB_TM) is the value obtained by multiplying the total playback time (sec) of all PGs belonging to that ATS_PGC by 90k.
90k is the system clock frequency in the sense of 90kHz.

[L-2] FAC_ST_PTM in ATS_PGI: This is information indicating the reproduction start time of the first audio cell of the audio title set program described in the audio title set program information.

This information, that is, Start Presentation tim
e of the first Audio-Cell in ATS_PG (FAC_ST_PTM) is the first audio cell of the first Audio Cell belonging to that ATS_PG.
This is, for example, the lower 32 bits of the PTS value of audio packet.

[L-3] ATS_PG_PB_TM in ATS_PGI: Audio title set program reproduction time described in the audio title set program information.

[0359] This information, that is, ATS_PG Playback time (A
The contents of (TS_PG_PB_TM) are all cells belonging to that ATS_PG.
It is a value obtained by multiplying the total playback time of (sec) by 90k.

[L-4] ATS_PG_PA_TM in ATS_PGI: Audio title set pause time information described in the audio title set program information.

This information, that is, ATS_PG Pause time (ATS_
PG_PA_TM) is the playback pause time at the beginning of the ATS_PG, that is, the sum (sec) of the audio gap length and the playback time of Silent Cell multiplied by 90k.

[L-5] ATS_PG_EN_CN in ATS_PGI: This is information called the entry cell number of the audio title set program described in the audio title set program information.

This information, that is, Entry Cell number of
The content of ATS_PG (ATS_PG_EN_CN) is the audio title set cell (ATS_C) number of the first cell of the cells (Cells) forming the ATS_PG.

[L-6] ATS_C_IXN in ATS_C_PBI: This is information called an audio title set cell index number described in the audio title set cell reproduction information.

This information, that is, Index number of ATS_C
The content of (ATS_C_IXN) is' 0 if the audio title set cell (ATS_C) is a silent cell (Silent Cell) or a still picture cell (Still picture Cell).
If it is 0h ', and audio (Audio Cell), it is information indicating the value of the index number of the ATS_C. And one audio title set program (AT
In of the first audio cell (Audio Cell) in S_PG)
The dex number is '1'.

[L-7] ATS_C_TY in ATS_C_PBI: Information called an audio title set cell type described in the audio title set cell reproduction information.

This information, that is, the content of ATS_C type (ATS_C_TY) is information indicating whether the ATS_C is an Audio Cell, a Silent Cell, or a Still picture Cell. [L-8] ATS_C_SA in ATS_C_PBI: This is information called an audio title set cell start address described in the audio title set cell playback information.

[0368] This information, that is, Start address of ATS_C (A
The content of (TS_C_SA) is 1 of AOTT_AOBS to which the ATS_C belongs.
From the second logical block, start address of that ATS_C
Is the value of the relative logical block number up to.

[L-9] ATS_C_EA in ATS_C_PBI: This is information called an audio title set cell end address described in the audio title set cell reproduction information.

[0370] This information, that is, End address of ATS_C (A
The content of (TS_C_EA) is 1 of AOTT_AOBS to which the ATS_C belongs.
It is the value of the relative logical block number from the second logical block to the end address (address) of the ATS_C.

[Specific Usage] Item [L-1] above
The procedure for calculating the necessary time information for items [K-1] to [K-7] based on the information defined in [L-9] is shown below.

The sections [K-1] to [K-7] are shown in FIG.

Elapsed playback time of one entire track (eg:
For track # 2) in FIG. 42, [K-1] = ([L-3]-[L-
4]) / 90k can be recognized.

The reproduction time of one title group as a whole (eg, tracks # 1, # 2, and # 3 in FIG. 42) is [K-2].
= It can be recognized at [L-1] / 90k.

[0375] The playback time from the beginning of the track of the point that is currently being listened to, that is, currently being decoded and output, is [K-3] = ((lower 32bits of PTS of the indicated
It can be recognized by packet)-[L-2]) / 90k.

The playback time from the beginning of the title group of the point currently being listened to is [K-4] = {((Sum of ATS_PG_PB
_TMs of all previous ATS_PGs in the ATS_PGC) + [L-
4]) / 90k} + [K-3] can be recognized.

Sum of ATS_PG_PB_TMs of all previous A
TS_PGs in the ATS_PGC is the sum of the audio title set program play times of all preceding audio title set programs in the audio title set program chain.

The remaining reproduction time of the track to which the point currently listened belongs can be recognized by [K-5] = [K-1]-[K-3].

[0379] The remaining playback time of the entire title group at the point of listening can be recognized by [K-6] = [K-2]-[K-4].

[0380] The playback time from the beginning of the title group of the beginning point of a certain track is [K-7] = ((Sum of ATS_P
G_PB_TMs of all previous ATS_PGs in the ATS_PGC) +
[L-4]) / 90k can be recognized.

Sum of ATS_PG_PB_TMs of all previous A
TS_PGs in the ATS_PGC means a total value of audio title set playing times of all preceding audio title set programs in the audio title set program chain.

Next, a method for calculating the address information of [K-8] to [K-9] based on the information defined in [L-1] to [L-9] above is shown below.

When the reproduction elapsed time is designated from the beginning of the track (Track), the address [K-8] of that point is as follows.

First, since the audio stream (Audio stream) of DVD audio has a fixed rate, [K-8]
The relative address value corresponding to the time is calculated.

Next, from [L-5], [L-6], [L-7], and [L-8], the start address (ATS_C_SA) of the first Audio Cell of the ATS_PG
Ask for.

Accordingly, the target address information can be obtained by obtaining [K-8] = (relative address value corresponding to the time of [K-8]) + (ATS_C_SA of the first cell).

[0387] When the playback elapsed time is specified from the beginning of the title group (TT_GR), the address [K
-9] is as follows.

First, each AT belonging to that TT_GR from [L-3]
Know the playback time of S_PG.

By using the relationship of [L-9] * 90k, it is possible to know in which ATS_PG the designated time point is.

Next, from [L-9]-[L-7], the time from the beginning of the ATS_PG to which the specified time point belongs can be found.
The rest of the procedure is the same as [K-8}.

That is, since the audio stream of the DVD audio has a fixed rate, the relative address value corresponding to the time of the designated point is obtained.

Next, from [L-5], [L-6], [L-7], and [L-8], the start address (ATS_C_SA) of the first Audio Cell of the ATS_PG
Ask for.

As a result, [K-9] = (relative address value corresponding to the time of the designated point) + (ATS_C_SA of the first Cell)
Can be asked.

The reproducing apparatus can present the reproducing time information of [K-1] to [K-7] to the user by using the above method. In addition, the user [K-8] ~ [K-9]
When the j-jump time is specified, the playback device can calculate the jump destination address using the above method and execute the jump operation.

As described above, in this system, by adding the above information to the DVD audio, the reproducing apparatus and its user can obtain sufficient time information to perform various kinds of reproducing operations. .

FIG. 43 shows a reproducing apparatus for reproducing the above-mentioned DVD audio disc. Since this reproducing apparatus reproduces only audio data, it has no system for processing video data and sub-picture data as compared with the apparatus shown in FIG. With this device,
When the disc on which the still picture cell described above is recorded is played back, after determining the cell type,
It just ignores the data period of that still picture cell. That is, the system processor unit 54 does not transfer the pack of the data to the audio decoder unit 60 even when the still picture cell data arrives. When the silent cell data arrives, it is transferred to the audio decoder unit 60 as audio data. The other parts are substantially the same as the device shown in FIG.

Although the still picture cell is completely ignored in the above embodiment, the system processor unit 54 may be provided with the terminal 54-1 for separating and deriving only the packs forming the still picture cell. With such a configuration, for example, by playing an audio disc at home and supplying the still picture to the decoder input terminal of the DVD reproducing device, even if the disc having the still picture is purchased, it is effectively utilized. can do. Of course, an audio output terminal may be added.

In the case of this reproducing apparatus, when the real-time information is recorded on the disc, the data is demodulated by the system control unit 50 or a demodulation unit separately provided,
It can be displayed on the panel display unit 4B. In this case, the panel display section 4B preferably has a screen such as a liquid crystal. As the key input unit 4, various keys such as a numeric keypad are provided.

Each type of disc reproducing apparatus must have a function of identifying the cell type.

FIG. 44 shows a reproducing apparatus capable of reproducing a still picture recorded on a disc. When still picture data is recorded on the disc, the reproducing apparatus can reproduce the data and display it on the monitor 6. When reproducing other types of discs, the same operation as that of the apparatus of FIG. 43 is obtained.

In the above description, the relationship between the recording medium and the disc reproducing device has been described. However, the audio data defined as above is transmitted by the transmitting device,
It goes without saying that it is within the scope of the present invention to have the receiving device receive and reproduce the data. It is also possible to previously transmit control data for realizing a function capable of receiving and processing audio data as described above to the receiving device, and then read or reproduce the audio information defined above from a recording medium or reproduce it. This is a category of invention. In addition, an optical disc or magnetic disc having control data for realizing a function capable of receiving or processing audio data as described above is installed in a flexible personal computer in advance, and then the above-mentioned definition is used. It is also within the scope of the present invention to receive audio data and process it, or read it from a recording medium and reproduce it.

[0402]

As described above, according to the present invention, the reproducing apparatus and its user can obtain sufficient time information and management information for performing various kinds of reproducing operations, thus improving the usability of the reproducing apparatus. can do.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating the structure of an optical disc that can be used as a recording medium for DVD audio.

FIG. 2 is a view for explaining a correspondence relationship between a data recording area of the optical disc of FIG. 1 and a recording track of data recorded therein.

FIG. 3 is a diagram illustrating a hierarchical structure of information recorded in a DVD audio zone among various information recorded on the optical disc of FIG.

4 is a diagram illustrating a hierarchical structure of information recorded in a DVD video zone among various information recorded on the optical disc of FIG.

5 shows program chain information (ATS_PGCI) of the DVD audio zone of FIG. 3 and program chain information (VTS_PGC of the DVD video zone of FIG. 4).
I) Video information (VT) commonly accessed from both
FIG. 6 is a diagram illustrating an example of S_C # 2).

FIG. 6 shows the recorded contents of the DVD audio zone of FIG. 3 (A
The figure explaining an example of the data structure of (OTT_AOBS).

FIG. 7 shows the recorded contents of the DVD audio zone of FIG. 3 (A
The figure explaining the other example of the data structure of (OTT_AOBS).

FIG. 8 shows the recorded contents of the DVD video zone of FIG. 4 (VTS
The figure explaining an example of the data structure of (TT_VOBS).

9 is a diagram illustrating an example of a data structure which is recorded content of user-accessible DVD audio and is recorded on one side of the optical disc of FIG. 1. FIG.

10 is a diagram illustrating information recorded on the optical disc of FIG.
The figure explaining an example of the directory structure of the audio and the DVD video data file.

FIG. 11 is information (DVD which is recorded on the optical disc of FIG.
The figure explaining the other example of the directory structure of the audio and the DVD video data file.

12 is a diagram for explaining a case of accessing a file in a directory on the video content side from a directory on the audio content side in the directory structure of FIG.

13 is a diagram illustrating a case where a file in a directory on the audio content side is linked to a file in a directory on the video content side in the directory structure of FIG.

FIG. 14 shows the file access of FIG. 12 in FIG. 3 and FIG.
FIG. 6 is a diagram for explaining an example of how this is performed in the volume space of FIG.

FIG. 15 shows the file access of FIG.
FIG. 6 is a diagram for explaining another example of how this is performed in the volume space of FIG.

16 is a schematic diagram of the file access of FIG.
FIG. 6 is a diagram for explaining still another example of how this is performed in the volume space of FIG.

17 is a diagram for explaining the recorded contents of audio manager information (AMGI) in the DVD audio zone of FIG.

FIG. 18 is an audio manager information (AMG of FIG.
FIG. 6 is a diagram for explaining the recorded contents of an audio manager information management table (AMGI_MAT) included in I).

FIG. 19 is an audio manager information (AMG of FIG.
The figure explaining the content of the search pointer table (ATT_SRPT) of the audio title contained in I).

20 is a diagram illustrating the contents of an audio title search pointer (ATT_SRP) included in the audio title search pointer table (ATT_SRPT) of FIG. 19;

FIG. 21 is a diagram showing the audio manager information (AMG) of FIG.
The figure explaining the content of the search pointer table (AOTT_SRPT) of the audio only title contained in I).

22 is an audio-only title search pointer (AO) included in the audio-only title search pointer table (AOTT_SRPT) of FIG. 21;
The figure explaining the content of (TT_SRP).

FIG. 23 is an audio manager information (AMG of FIG.
Group (AOTT_GR) of audio-only titles accessed by the audio-only title search pointer (AOTT_SRP) in I) and audio title accessed by the audio-title search pointer (ATT_SRP) in this audio manager information (AMGI) Group (ATT_GR)
FIG.

FIG. 24 is a view for explaining the recorded contents of an audio title set (ATS) in the DVD audio zone of FIG.

FIG. 25 is a diagram showing the audio title set information (A
The figure explaining the recording content of the audio title set information management table (ATSI_MAT) contained in (TSI).

FIG. 26 is a diagram showing audio title set information (A
The figure explaining the content of the audio title set program chain information table (ATS_PGCIT) contained in TSI).

FIG. 27 is a view for explaining the contents of audio title set program information (ATS_PGI) in FIG. 26.

28 is a diagram illustrating the content of audio title set cell playback information (ATS_C_PBI) in FIG. 26.

29 is a block diagram showing an example of an apparatus for reproducing the recorded information of the audio zone of FIG. 3 or the recorded information of the video zone of FIG. 4 from the optical disc of FIG.

FIG. 30 is a diagram showing an example of a front panel of the playback device shown in FIG. 29.

FIG. 31 is an explanatory diagram showing types of audio data cells, which are essential parts of the present invention.

FIG. 32 is an explanatory diagram showing the types of audio title set programs and the data arrangement structure thereof.

FIG. 33 is an explanatory diagram showing an example of a pack string of audio only data of audio only titles.

[Fig. 34] Fig. 34 is a diagram illustrating a pack sequence when audio only title audio and real-time data are present.

[Fig. 35] Fig. 35 is a diagram showing an example of a pack sequence when an audio cell and an silent cell of an audio-only title exist.

[Fig. 36] Fig. 36 is a diagram illustrating an example of a pack string when an audio cell, a still picture cell, and a silent cell of an audio only title exist.

FIG. 37 is a diagram showing a pack string consisting of only audio cells having the same attributes in the preceding and subsequent programs, and changes in presentation time stamps and changes in playback time depending on the playback order.

FIG. 38 is a diagram showing a pack sequence consisting only of audio cells with different attributes in front and back programs, and changes in presentation time stamps and changes in playback time depending on the playback order.

[Fig. 39] Fig. 39 is a diagram illustrating a pack string including still picture cells and audio cells having the same attribute in the preceding and following programs, and changes in presentation time stamps and changes in playback time depending on the playback order.

[Fig. 40] Fig. 40 is a diagram showing a pack string including still picture cells, for example, audio cells having different attributes in front and back programs, and changes in presentation time stamps and changes in playback time depending on the playback order.

FIG. 41 is an explanatory diagram showing layers up to which cell types, various time information and the like are described in the audio zone of the disc according to the present invention.

FIG. 42 is a data array explanatory diagram shown for explaining some examples of a method of using management information in a data structure according to the present invention.

FIG. 43 is a diagram showing another example of the disc reproducing apparatus according to the present invention.

FIG. 44 is a diagram showing still another example of the disc reproducing apparatus according to the present invention.

[Explanation of symbols]

4 ... key input section, 4A ... remote controller receiving section,
4B ... Panel display section (fluorescent tube display etc.), 5 ... Remote controller, 6 ... Monitor section, 8L, 8R ... Speaker, 30 ... Disk drive section, 50 ... Control section, 500
... Micro processing unit MPU (or central processing unit CPU), 502 ... Read only memory ROM (storage of control programs, etc.), 52
... random access memory RAM (work memory of control unit 50), 53 ... memory interface, 54 ... system processor unit, 58 ... video decoder unit, 60 ... audio decoder unit, 62 ... sub-picture decoder unit, 64 ... digital / analog conversion And a reproduction processing unit 640, a video processor unit (including an on-screen display OSD unit),
642 ... Frame memory section, 644 ... Digital / analog converter and output circuit, 70 ... Volume and file structure area, 71 ... DVD audio zone, 71
1 ... Audio manager AMG, 712 ... Audio title set ATS, 7110 ... Audio manager information file AMGI, 7111 ... Audio object menu video object set file AM
GM_VOBS, 7112 ... AMGI backup file AMGI_BUP, 7120 ... Audio title set information file ATSI, 7121 ... Audio only title audio object set A
OTT_AOBS, 7123 ... ATSI backup file ATSI_BUP, 72 ... DVD video zone, 73 ... Other recording area.

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G11B 27/00 G11B 20/12

Claims (9)

(57) [Claims] 1. Data read and processed by using a computer control device has at least an audio object and management information, the audio object (AOB) includes a program (PG), and the program (PG) is Multiple cells (Ce
ll), and each cell (Cell) contains multiple packs that store data .
A real-time pack (RTI_PCK) including real- time information, which is additional data, is defined, and as the types of the cells, an audio cell (A_C) and a silent output whose data contents obtain an audio output. A silent cell (SI_C), which is a type including data, is defined, the management information is for reproducing the audio object, and program chain information (PGCI).
The program chain information includes the program chain general information (ATS_PGC_GI).
, A program information table (ATS_PGIT) including the numbers of the entry cells of a plurality of programs, and a cell reproduction information table (ATS_C_PBIT) indicating the reproduction position of the cell of each program. The (ATS_C_PBIT) includes cell type information (C_TY) that identifies the type of the audio cell or the silent cell, a start (S_SA) and an end address (C_EA) of the cell, and a cell index number (C_IXN). In the type information (C_TY), the information is that the audio cell consisting only of audio data is identified as “00b”, the audio cell consisting of audio data and real-time information is identified as “01b”, and the silent cell is identified as “10b”, and the corresponding cell. Whether it is the spotlight part Including the cell usage information (C_Usage) indicating, the program chain general information, the playback device for playing the program, in order to recognize the sum of the playback time of the plurality of programs, time of a value multiplied by a predetermined number Information is stored, and the program information table (ATS_PGIT) is also stored.
In order for the reproducing device for reproducing the program to recognize each program reproducing time of the plurality of programs, the program time information (ATS_) having a value multiplied by a predetermined number is included.
PG_PB_TM) and pause time information (ATS_PG_PA_TM) of a value obtained by multiplying by a predetermined number to obtain the pause time at the start of each program are stored, and audio information readable by a computer control device. recoding media. 2. Data read and processed by a computer control device has at least an audio object and management information, the audio object (AOB) includes a program (PG), and the program (PG) is Multiple cells (Ce
ll), and each cell (Cell) contains multiple packs that store data .
A real-time pack (RTI_PCK) including real- time information, which is additional data, is defined, and as the types of the cells, an audio cell (A_C) and a silent output whose data contents obtain an audio output. A silent cell (SI_C), which is a type including data, is defined, the management information includes an audio manager information management table (AMGI_MAT), and the audio manager information management table includes a provider ID (P
VR_ID) is included, the management information is for playing the audio object, and program chain information (PGC).
I), and the program chain information includes program chain general information (ATS_PGC_GI).
, A program information table (ATS_PGIT) including the numbers of the entry cells of a plurality of programs, and a cell reproduction information table (ATS_C_PBIT) indicating the reproduction position of the cell of each program. The (ATS_C_PBIT) includes cell type information (C_TY) that identifies the type of the audio cell or the silent cell, a start (S_SA) and an end address (C_EA) of the cell, and a cell index number (C_IXN). In the type information (C_TY), the information is that the audio cell consisting only of audio data is identified as “00b”, the audio cell consisting of audio data and real-time information is identified as “01b”, and the silent cell is identified as “10b”, and the corresponding cell. Whether it is the spotlight part Including the cell usage information (C_Usage) indicating, the program chain general information, the playback device for playing the program, in order to recognize the sum of the playback time of the plurality of programs, time of a value multiplied by a predetermined number Information is stored, and the program information table (ATS_PGIT) is also stored.
In order for the reproducing device for reproducing the program to recognize each program reproducing time of the plurality of programs, the program time information (ATS_) having a value multiplied by a predetermined number is included.
PG_PB_TM) and pause time information (ATS_PG_PA_TM) of a value obtained by multiplying by a predetermined number to obtain the pause time at the start of each program are stored, and audio information readable by a computer control device. recoding media. 3. Data read and processed by using a computer control device has at least an audio object and management information, the audio object (AOB) includes a program (PG), and the program (PG) is Multiple cells (Ce
ll), and each cell (Cell) contains multiple packs that store data .
A real-time pack (RTI_PCK) including real- time information, which is additional data, is defined, and as the types of the cells, an audio cell (A_C) and a silent output whose data contents obtain an audio output. A silent cell (SI_C), which is a type including data, is defined, the management information includes an audio manager information management table (AMGI_MAT), and the audio manager information management table includes a provider ID (P
VR_ID), audio title (ATT) search pointer table start address and audio only title (AOTT) search pointer table start address are included, and the audio title search pointer table search pointer (ATT_SRP) and the audio only title are included. The search pointer (ATT_SRP) of the search pointer table describes the total reproduction time information of the audio title searched by the pointer, and the management information is for reproducing the audio object. Chain information (PGC
I), and the program chain information includes program chain general information (ATS_PGC_GI).
, A program information table (ATS_PGIT) including the numbers of the entry cells of a plurality of programs, and a cell reproduction information table (ATS_C_PBIT) indicating the reproduction position of the cell of each program. The (ATS_C_PBIT) includes cell type information (C_TY) that identifies the type of the audio cell or the silent cell, a start (S_SA) and an end address (C_EA) of the cell, and a cell index number (C_IXN). In the type information (C_TY), the information is that the audio cell consisting only of audio data is identified as “00b”, the audio cell consisting of audio data and real-time information is identified as “01b”, and the silent cell is identified as “10b”, and the corresponding cell. Whether it is the spotlight part Including the cell usage information (C_Usage) indicating, the program chain general information, the playback device for playing the program, in order to recognize the sum of the playback time of the plurality of programs, time of a value multiplied by a predetermined number Information is stored, and the program information table (ATS_PGIT) is also stored.
In order for the reproducing device for reproducing the program to recognize each program reproducing time of the plurality of programs, the program time information (ATS_) having a value multiplied by a predetermined number is included.
PG_PB_TM) and pause time information (ATS_PG_PA_TM) of a value obtained by multiplying by a predetermined number to obtain the pause time at the start of each program are stored, and audio information readable by a computer control device. recoding media. 4. In the audio information reproducing apparatus, the information recording medium has at least audio object and management information for data read and processed by the computer control apparatus, and the audio object (AOB) is a program ( PG), this program (PG) contains multiple cells (Ce
ll), and each cell (Cell) contains multiple packs that store data .
A real-time pack (RTI_PCK) including real- time information, which is additional data, is defined, and as the types of the cells, an audio cell (A_C) and a silent output whose data contents obtain an audio output. A silent cell (SI_C), which is a type including data, is defined, the management information is for reproducing the audio object, and program chain information (PGCI).
The program chain information includes the program chain general information (ATS_PGC_GI).
, A program information table (ATS_PGIT) including the numbers of the entry cells of a plurality of programs, and a cell reproduction information table (ATS_C_PBIT) indicating the reproduction position of the cell of each program. The (ATS_C_PBIT) includes cell type information (C_TY) that identifies the type of the audio cell or the silent cell, a start (S_SA) and an end address (C_EA) of the cell, and a cell index number (C_IXN). In the type information (C_TY), the information is that the audio cell consisting only of audio data is identified as “00b”, the audio cell consisting of audio data and real-time information is identified as “01b”, and the silent cell is identified as “10b”, and the corresponding cell. Whether it is the spotlight part Including the cell usage information (C_Usage) indicating, the program chain general information, the playback device for playing the program, in order to recognize the sum of the playback time of the plurality of programs, time of a value multiplied by a predetermined number Information is stored, and the program information table (ATS_PGIT) is also stored.
In order for the reproducing device for reproducing the program to recognize each program reproducing time of the plurality of programs, the program time information (ATS_) having a value multiplied by a predetermined number is included.
PG_PB_TM) and pause time information (ATS_PG_PA_TM) of a value obtained by multiplying a predetermined number in order to obtain a pause time at the start of each program, which is an audio information recording medium. A unit for reading and storing information (ATS_PG_PB_TM) on the reproduction time of each program in the program information table; a unit for obtaining the reproduction time by dividing the information on the reproduction time for each program by 90,000; Pause time information (A
Means for reading and storing (TS_PG_PA_TM), and 9 for the pause time information (ATS_PG_PA_TM).
An audio information reproducing apparatus comprising means for obtaining a pause time by dividing by 0000. 5. In the audio information reproducing apparatus, the information recording medium has at least audio object and management information for data read and processed by a computer controller, and the audio object (AOB) is a program ( PG), this program (PG) contains multiple cells (Ce
ll), and each cell (Cell) contains multiple packs that store data .
A real-time pack (RTI_PCK) that contains real- time information that is additional data is defined. As the cell type, an audio cell (A_C) whose data content is an audio output type and a type that includes silence output data are defined. A certain silent cell (SI_C) is defined, the management information has an audio manager information management table (AMGI_MAT), and the audio manager information management table has a provider ID (P
VR_ID) is included, the management information is for playing the audio object, and program chain information (PGC).
I), and the program chain information includes program chain general information (ATS_PGC_GI).
, A program information table (ATS_PGIT) including the numbers of the entry cells of a plurality of programs, and a cell reproduction information table (ATS_C_PBIT) indicating the reproduction position of the cell of each program. The (ATS_C_PBIT) includes cell type information (C_TY) that identifies the type of the audio cell or the silent cell, a start (S_SA) and an end address (C_EA) of the cell, and a cell index number (C_IXN). In the type information (C_TY), the information is that the audio cell consisting only of audio data is identified as “00b”, the audio cell consisting of audio data and real-time information is identified as “01b”, and the silent cell is identified as “10b”, and the corresponding cell. Whether it is the spotlight part Including the cell usage information (C_Usage) indicating, the program chain general information, the playback device for playing the program, in order to recognize the sum of the playback time of the plurality of programs, time of a value multiplied by a predetermined number Information is stored, and the program information table (ATS_PGIT) is also stored.
In order for the reproducing device for reproducing the program to recognize each program reproducing time of the plurality of programs, the program time information (ATS_) having a value multiplied by a predetermined number is included.
PG_PB_TM) and pause time information (ATS_PG_PA_TM) of a value obtained by multiplying a predetermined number in order to obtain a pause time at the start of each program, which is an audio information recording medium. A unit for reading and storing information (ATS_PG_PB_TM) on the reproduction time of each program in the program information table; a unit for obtaining the reproduction time by dividing the information on the reproduction time for each program by 90,000; Pause time information (A
Means for reading and storing (TS_PG_PA_TM), and 9 for the pause time information (ATS_PG_PA_TM).
An audio information reproducing apparatus comprising means for obtaining a pause time by dividing by 0000. 6. In the audio information reproducing apparatus, the information recording medium has at least an audio object and management information for data read and processed by a computer controller, and the audio object (AOB) is a program ( PG), this program (PG) contains multiple cells (Ce
ll), and each cell (Cell) contains multiple packs that store data .
A real-time pack (RTI_PCK) including real- time information, which is additional data, is defined, and as the types of the cells, an audio cell (A_C) and a silent output whose data contents obtain an audio output. A silent cell (SI_C), which is a type including data, is defined, the management information includes an audio manager information management table (AMGI_MAT), and the audio manager information management table includes a provider ID (P
VR_ID), audio title (ATT) search pointer table start address and audio only title (AOTT) search pointer table start address are included, and the audio title search pointer table search pointer (ATT_SRP) and the audio only title are included. The search pointer (ATT_SRP) of the search pointer table describes the total reproduction time information of the audio title searched by the pointer, and the management information is for reproducing the audio object. Chain information (PGC
I), and the program chain information includes program chain general information (ATS_PGC_GI).
, A program information table (ATS_PGIT) including the numbers of the entry cells of a plurality of programs, and a cell reproduction information table (ATS_C_PBIT) indicating the reproduction position of the cell of each program. The (ATS_C_PBIT) includes cell type information (C_TY) that identifies the type of the audio cell or the silent cell, a start (S_SA) and an end address (C_EA) of the cell, and a cell index number (C_IXN). In the type information (C_TY), the information is that the audio cell consisting only of audio data is identified as “00b”, the audio cell consisting of audio data and real-time information is identified as “01b”, and the silent cell is identified as “10b”, and the corresponding cell. Whether it is the spotlight part Including the cell usage information (C_Usage) indicating, the program chain general information, the playback device for playing the program, in order to recognize the sum of the playback time of the plurality of programs, time of a value multiplied by a predetermined number Information is stored, and the program information table (ATS_PGIT) is also stored.
In order for the reproducing device for reproducing the program to recognize each program reproducing time of the plurality of programs, the program time information (ATS_) having a value multiplied by a predetermined number is included.
PG_PB_TM) and pause time information (ATS_PG_PA_TM) of a value obtained by multiplying a predetermined number in order to obtain a pause time at the start of each program, which is an audio information recording medium. A unit for reading and storing information (ATS_PG_PB_TM) on the reproduction time of each program in the program information table; a unit for obtaining the reproduction time by dividing the information on the reproduction time for each program by 90,000; Pause time information (A
Means for reading and storing (TS_PG_PA_TM), and 9 for the pause time information (ATS_PG_PA_TM).
An audio information reproducing apparatus comprising means for obtaining a pause time by dividing by 0000. 7. In the audio information reproducing method, the information recording medium has at least audio object and management information for data read and processed by a computer control device, and the audio object (AOB) is a program ( PG), this program (PG) contains multiple cells (Ce
ll), and each cell (Cell) contains multiple packs that store data .
A real-time pack (RTI_PCK) including real- time information, which is additional data, is defined, and as the types of the cells, an audio cell (A_C) and a silent output whose data contents obtain an audio output. A silent cell (SI_C), which is a type including data, is defined, the management information is for reproducing the audio object, and program chain information (PGCI).
The program chain information includes the program chain general information (ATS_PGC_GI).
, A program information table (ATS_PGIT) including the numbers of the entry cells of a plurality of programs, and a cell reproduction information table (ATS_C_PBIT) indicating the reproduction position of the cell of each program. The (ATS_C_PBIT) includes cell type information (C_TY) that identifies the type of the audio cell or the silent cell, a start (S_SA) and an end address (C_EA) of the cell, and a cell index number (C_IXN). In the type information (C_TY), the information is that the audio cell consisting only of audio data is identified as “00b”, the audio cell consisting of audio data and real-time information is identified as “01b”, and the silent cell is identified as “10b”, and the corresponding cell. Whether it is the spotlight part Including the cell usage information (C_Usage) indicating, the program chain general information, the playback device for playing the program, in order to recognize the sum of the playback time of the plurality of programs, time of a value multiplied by a predetermined number Information is stored, and the program information table (ATS_PGIT) is also stored.
In order for the reproducing device for reproducing the program to recognize each program reproducing time of the plurality of programs, the program time information (ATS_) having a value multiplied by a predetermined number is included.
PG_PB_TM) and pause time information (ATS_PG_PA_TM) that is a value obtained by multiplying a predetermined number to obtain the pause time at the start of each program, and is an audio information recording medium. The reproduction time information (ATS_PG_PB_TM) of each program in the program information table is read and stored, the reproduction time information is obtained by dividing the reproduction time information of each program by 90,000, and the pause time information of the program information table is obtained. (A
TS_PG_PA_TM) is read and stored, and the pause time information (ATS_PG_PA_TM) is set to 9
A method for reproducing information for audio, characterized by obtaining a pause time by dividing by 0000. 8. In the audio information reproducing method, the information recording medium has at least audio object and management information for data read and processed by a computer controller, and the audio object (AOB) is a program ( PG), this program (PG) contains multiple cells (Ce
ll), and each cell (Cell) contains multiple packs that store data .
A real-time pack (RTI_PCK) including real- time information, which is additional data, is defined, and as the types of the cells, an audio cell (A_C) and a silent output whose data contents obtain an audio output. A silent cell (SI_C), which is a type including data, is defined, the management information includes an audio manager information management table (AMGI_MAT), and the audio manager information management table includes a provider ID (P
VR_ID) is included, the management information is for playing the audio object, and program chain information (PGC).
I), and the program chain information includes program chain general information (ATS_PGC_GI).
, A program information table (ATS_PGIT) including the numbers of the entry cells of a plurality of programs, and a cell reproduction information table (ATS_C_PBIT) indicating the reproduction position of the cell of each program. The (ATS_C_PBIT) includes cell type information (C_TY) that identifies the type of the audio cell or the silent cell, a start (S_SA) and an end address (C_EA) of the cell, and a cell index number (C_IXN). In the type information (C_TY), the information is that the audio cell consisting only of audio data is identified as “00b”, the audio cell consisting of audio data and real-time information is identified as “01b”, and the silent cell is identified as “10b”, and the corresponding cell. Whether it is the spotlight part Including the cell usage information (C_Usage) indicating, the program chain general information, the playback device for playing the program, in order to recognize the sum of the playback time of the plurality of programs, time of a value multiplied by a predetermined number Information is stored, and the program information table (ATS_PGIT) is also stored.
In order for the reproducing device for reproducing the program to recognize each program reproducing time of the plurality of programs, the program time information (ATS_) having a value multiplied by a predetermined number is included.
PG_PB_TM) and pause time information (ATS_PG_PA_TM) that is a value obtained by multiplying a predetermined number to obtain the pause time at the start of each program, and is an audio information recording medium. The reproduction time information (ATS_PG_PB_TM) of each program in the program information table is read and stored, the reproduction time information is obtained by dividing the reproduction time information of each program by 90,000, and the pause time information of the program information table is obtained. (A
TS_PG_PA_TM) is read and stored, and the pause time information (ATS_PG_PA_TM) is set to 9
A method for reproducing information for audio, characterized by obtaining a pause time by dividing by 0000. 9. In the audio information reproducing method, the information recording medium has at least audio object and management information for data read and processed by a computer control device, and the audio object (AOB) is a program ( PG), this program (PG) contains multiple cells (Ce
ll), and each cell (Cell) contains multiple packs that store data .
A real-time pack (RTI_PCK) including real- time information, which is additional data, is defined, and as the types of the cells, an audio cell (A_C) and a silent output whose data contents obtain an audio output. A silent cell (SI_C), which is a type including data, is defined, the management information includes an audio manager information management table (AMGI_MAT), and the audio manager information management table includes a provider ID (P
VR_ID), audio title (ATT) search pointer table start address and audio only title (AOTT) search pointer table start address are included, and the audio title search pointer table search pointer (ATT_SRP) and the audio only title are included. The search pointer (ATT_SRP) of the search pointer table describes the total reproduction time information of the audio title searched by the pointer, and the management information is for reproducing the audio object. Chain information (PGC
I), and the program chain information includes program chain general information (ATS_PGC_GI).
, A program information table (ATS_PGIT) including the numbers of the entry cells of a plurality of programs, and a cell reproduction information table (ATS_C_PBIT) indicating the reproduction position of the cell of each program. The (ATS_C_PBIT) includes cell type information (C_TY) that identifies the type of the audio cell or the silent cell, a start (S_SA) and an end address (C_EA) of the cell, and a cell index number (C_IXN). In the type information (C_TY), the information is that the audio cell consisting only of audio data is identified as “00b”, the audio cell consisting of audio data and real-time information is identified as “01b”, and the silent cell is identified as “10b”, and the corresponding cell. Whether it is the spotlight part Including the cell usage information (C_Usage) indicating, the program chain general information, the playback device for playing the program, in order to recognize the sum of the playback time of the plurality of programs, time of a value multiplied by a predetermined number Information is stored, and the program information table (ATS_PGIT) is also stored.
In order for the reproducing device for reproducing the program to recognize each program reproducing time of the plurality of programs, the program time information (ATS_) having a value multiplied by a predetermined number is included.
PG_PB_TM) and pause time information (ATS_PG_PA_TM) that is a value obtained by multiplying a predetermined number to obtain the pause time at the start of each program, and is an audio information recording medium. The reproduction time information (ATS_PG_PB_TM) of each program in the program information table is read and stored, the reproduction time information is obtained by dividing the reproduction time information of each program by 90,000, and the pause time information of the program information table is obtained. (A
TS_PG_PA_TM) is read and stored, and the pause time information (ATS_PG_PA_TM) is set to 9
A method for reproducing information for audio, characterized by obtaining a pause time by dividing by 0000.