JPH11120748A - Optical disk, reproducing device and reproducing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk and a device and a method for reproducing the same, which is capable of reproducing a voice matching the reproducing ability of the reproducing device. SOLUTION: An optical disk 100 stores first audio data obtained by expressing audio information according to a first audio attribute, and second audio data obtained by expressing the audio information according to a second audio attribute different from the first audio attribute. Further, the optical disk 100 stores management information for selectively reproducing one of the first and second audio data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk for storing multimedia data composed of audio information and moving image information associated with each other as digital data, a reproducing apparatus and a reproducing method thereof.

[0002]

2. Description of the Related Art Conventionally, optical disks for storing and reproducing audio information include CDs (Compact Disks) and DVs.
D-VIDEO is known.

A CD is an optical disc having a diameter of 12 cm. The CD stores audio information quantized using the linear PCM method.

[0004] DVD-VIDEO is an optical disc having a diameter of 12 cm. The DVD-Video stores audio information quantized using the linear PCM method or the AC3 method.

[0005] In recent years, with the progress of digital processing technology relating to audio, various systems have been proposed in addition to the above-mentioned systems.

[0006]

However, there is a problem for the application creator to determine which method of audio is used to produce the disc title. In addition, there is a problem for the user that there is a disc title that cannot be played unless there is a playback device corresponding to various methods.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an optical disk capable of reproducing a sound corresponding to the sound reproduction capability of a reproduction apparatus, a reproduction apparatus and a reproduction method thereof.

[0008]

The optical disk of the present invention comprises:
An optical disc having a data area and a management area,
In the data area, first audio data obtained by expressing audio information according to a first audio attribute, and the audio information is expressed according to a second audio attribute different from the first audio attribute. The second obtained by
Audio data, and management information for enabling one of the first audio data and the second audio data to be selectively reproduced is stored in the management area. Thus, the above object is achieved.

[0009] The management information may include information indicating a difference between the first audio attribute and the second audio attribute.

[0010] The management information includes information as to whether the voice coding mode in the first voice attribute is different from the voice coding mode in the second voice attribute, the number of channels in the first voice attribute, and the second voice attribute. May include information indicating whether or not the number of channels in the audio attribute is different.

[0011] A reproducing apparatus of the present invention is a reproducing apparatus for reproducing an optical disk, wherein the optical disk has a data area and a management area, and the data area has audio information according to a first audio attribute. Are stored, and second audio data obtained by expressing the audio information according to a second audio attribute different from the first audio attribute are stored. , The management area stores management information for enabling one of the first audio data and the second audio data to be selectively played back, and the playback device stores the management area in the management area. A reading unit that reads out the management information from the first audio data and the second audio data based on the audio playback capability of the playback device and the management information. And a reproducing unit for reproducing one of the audio data, thereby the objective described above being achieved.

[0012] The management information may include information indicating a difference between the first audio attribute and the second audio attribute.

[0013] The management information includes information as to whether the voice coding mode in the first voice attribute is different from the voice coding mode in the second voice attribute, the number of channels in the first voice attribute, and the second voice attribute. May include information indicating whether or not the number of channels in the audio attribute is different.

[0014] A reproducing method according to the present invention is a reproducing method for reproducing an optical disc, wherein the optical disc has a data area and a management area, and the data area has audio information according to a first audio attribute. Are stored, and second audio data obtained by expressing the audio information according to a second audio attribute different from the first audio attribute are stored. , The management area stores management information for enabling one of the first audio data and the second audio data to be selectively reproduced, and the reproduction method includes: Reproducing one of the first audio data and the second audio data based on the audio reproduction capability and the management information. It has free and thereby the objective described above being achieved.

[0015] The management information may include information indicating a difference between the first audio attribute and the second audio attribute.

[0016] The management information includes information as to whether the voice coding mode in the first voice attribute is different from the voice coding mode in the second voice attribute, the number of channels in the first voice attribute, and the second voice attribute. May include information indicating whether or not the number of channels in the audio attribute is different.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) The structure of an optical disk according to an embodiment of the present invention will be described below. (1) Physical Structure of Optical Disk FIG. 1A is a diagram illustrating an appearance of a DVD 100 that is an optical disk. FIG. 1B is a cross-sectional view of the DVD 100 along the line AA ′ shown in FIG. 1A. FIG. 1C shows FIG.
3 is an enlarged view of a portion B shown in FIG.

As shown in FIG. 1B, the DVD 100 has a first transparent substrate 108, an information layer 109, and an adhesive layer 11.
0, the second transparent substrate 111 and the printing layer 112 for label printing are laminated in this order.

The first transparent substrate 108 and the second transparent substrate 111 are reinforcing substrates of the same material. In the example shown in FIG. 1B, the thickness of these substrates is about 0.6 mm. The thickness of these substrates is approximately 0.5 mm to 0.7 m
m is sufficient.

The adhesive layer 110 is provided between the information layer 109 and the second transparent substrate 111 to adhere the information layer 109 to the second transparent substrate 111.

A reflection film (not shown) such as a metal thin film is formed on a surface of the information layer 109 which is in contact with the first transparent substrate 108. Concavo-convex pits are formed at a high density on this reflective film by a molding technique.

FIG. 1D shows the shape of a pit formed in the reflection film. In the example shown in FIG. 1D, each pit has a length of 0.4 μm to 2.054 μm. One track is spirally formed on the DVD 100. Each pit is formed along a spiral track so as to have an interval of 0.74 μm in the radial direction of the DVD 100. In this way, a pit row is formed on the spiral track.

When the DVD 100 is irradiated with the light beam 113, a light spot 114 is formed on the information layer 109 as shown in FIG. 1C. The information stored in the DVD 100 is detected as a change in the reflectance of the portion of the information layer 119 illuminated by the light spot 114.

The diameter of the light spot 114 on the DVD 100 is about 1 / 1.6 of the diameter of the light spot on a CD (Compact Disk). The numerical aperture NA of the objective lens for DVD is the numerical aperture N of the objective lens for CD.
This is because the wavelength λ of the light beam for DVD is larger than the wavelength A of the light beam for CD.

A DVD having such a physical structure can store about 4.7 Gbytes of information on one side.
The storage capacity of about 4.7 Gbytes is close to eight times the storage capacity of a conventional CD. Due to such large storage capacity of DVD,
It is possible to greatly improve the quality of moving images. It is also possible to greatly improve the reproduction time of a moving image. While the playback time of a conventional video CD is 74 minutes, the playback time of a DVD is 2 hours or more.

The basic technology for realizing such a large storage capacity is to reduce the spot diameter D of the light beam. The spot diameter D is given by a formula of spot diameter D = wavelength λ of laser / numerical aperture NA of the objective lens. Therefore, the spot diameter D can be narrowed down by reducing the wavelength λ of the laser and increasing the numerical aperture NA of the objective lens. Here, it should be noted that the numerical aperture NA of the objective lens is
Is large, coma aberration occurs due to the relative inclination (that is, tilt) between the disk surface and the optical axis of the light beam. In DVD, coma aberration is reduced by reducing the thickness of the transparent substrate. Reducing the thickness of the transparent substrate may cause another problem that the mechanical strength of the disk is reduced. In DVD, the strength of the transparent substrate is reinforced by bonding another substrate to the transparent substrate.
This overcomes the problem of the mechanical strength of the disk.

To read information stored on a DVD, a red semiconductor laser having a short wavelength of 650 nm and an objective lens having a large numerical aperture (NA) of about 0.6 mm are used. In addition to this, by using a thin transparent substrate of about 0.6 mm, about 4.7 G on one side of an optical disc having a diameter of 120 mm.
It became possible to store byte information.

FIG. 2A schematically shows a state where the spiral track 20 is formed from the inner circumference to the outer circumference of the information layer 109 of the DVD 100. The spiral track 20 is divided into predetermined units called sectors. In FIG. 2A,
The sectors are indicated by symbols such as S1, S2,..., S99, and S100. Reading of information stored in the DVD 100 is performed in sector units.

FIG. 2B shows the internal structure of a sector. The sector includes a sector header area 21 and a user data area 22.
And an error correction code storage area 23.

The sector header area 21 stores a sector address for identifying a sector and its error detection code. The disk reproducing device determines from which sector of a plurality of sectors information should be read based on the sector address.

The user data area 22 contains 2 KB
Long data is stored.

The error correction code storage area 23 stores error correction codes for the sector header area 21 and the user data area 22 included in the same sector. When reading data from the user data area 22, the disk playback device performs error detection using the error correction code, and performs error correction according to the result of the error detection. This guarantees the reliability of data reading.

(2) Logical Structure of Optical Disk FIG. 3 shows the logical structure of the DVD 100 as an optical disk. As shown in FIG. 3, the area of the DVD 100 is divided into a lead-in area 31, a volume area 32, and a lead-out area 33. These areas can be identified by the identification information included in the sector address of the physical sector. Physical sectors are arranged in ascending order by sector address.

The lead-in area 31 stores data for stabilizing the operation of the disk reproducing apparatus at the start of reading.

No significant data is stored in the lead-out area 33. The lead-out area 33 is used for notifying the disk playback device of the end of playback.

The volume area 32 stores digital data corresponding to the application. Physical sectors included in the volume area 32 are managed as logical blocks. A logical block is identified by assigning a continuous number (logical block number) to the physical sector following the physical sector No. 0, with the physical sector at the beginning of the volume area 32 being numbered zero. Portion 34 shown in FIG.
Indicates a logical block group in the volume area 32. In part 34, #m, # m + 1, # m + 2, #
m + 3,... indicate the logical block numbers assigned to the logical blocks.

As shown in FIG. 3, the volume area 3
2 is further divided into a volume / file management area 32a, a video zone area 32b, and an audio zone area 32c.

The volume / file management area 32a stores file system management information for managing a plurality of logical blocks as files in accordance with ISO13346. The file system management information is information indicating the correspondence between each file name of a plurality of files and the address of a logical block group occupied by each file. The disk reproducing device realizes accessing the optical disk in file units based on the file system management information. Specifically, the disc playback device refers to the file system management information,
The address of the logical block group corresponding to the given file name is obtained, and the logical block group is accessed based on this address. Thus, digital data of a desired file can be read.

The video zone area 32b contains video manager information 700 and one or more video title sets 6
00 is stored.

The video title set 600 includes a plurality of video data and management information for managing the reproduction order.
The video title set 600 has a data structure for managing video data in units called video titles. For example, when the video title set 600 is a movie application, each video title corresponds to a plurality of video versions such as a theater release version and an uncut version. The detailed data structure of the video title set 600 will be described later with reference to FIG.

The video manager information 700 includes information indicating the table of contents of the plurality of video title sets 600. Typically, video manager information 700 includes information for displaying a video menu for a user to select a desired one of a plurality of video title sets 600, and management information thereof. The detailed data structure of the video manager information 700 will be described later with reference to FIG.

The audio zone area 32c stores audio manager information 900 and one or more audio title sets 800.

The audio title set 800 includes a plurality of audio data and management information for managing the reproduction order. The audio title set 800 has a data structure for managing audio data in units called audio titles. Typically, an audio title corresponds to a music album that contains one or more songs. It should be noted that the audio title set 800 may include management information that defines the playback order of the video data included in the video title set 600. The detailed data structure of the audio title set 800 will be described later with reference to FIGS. 8A and 8B.

The audio manager information 900 includes information indicating a table of contents of a plurality of audio title sets 800. The detailed data structure of the audio manager information 900 will be described later with reference to FIG.

In FIG. 3, the video title set 6
00 and the audio title set 800 are both shown as one file. However, in practice, these are almost always composed of multiple consecutive files. This is because the data size of the moving image data is enormous, and when the moving image data is stored in one file, the file size exceeds 1 GB.

(3) Data structure of the video zone area 32b (FIG. 3)
00 and one or more video title sets 600 are stored.

(3.1) Data Structure of Video Title Set 600 FIG. 4 shows a data structure of the video title set 600. The video title set 600 includes a plurality of video objects (hereinafter, referred to as VOBs) 602 and a plurality of VOs.
B602, and video title set information 601 for managing the reproduction order. In the following description, the video title set may be abbreviated as VTS.

(3.1.1) Data Structure of VOB 602 The VOB 602 is multimedia data. The VOB 602 includes digital moving image data, digital audio data, sub-picture data, and management information thereof.

The VOB 602 is an MPEG2 (Movin)
g Picture ExpertGroup, ISO
11172, ISO13818) and is referred to as MPEG2 stream data. VO
B602 includes a plurality of VOB units (hereinafter, referred to as VOBUs) 603 arranged in chronological order. VOBU6
03 is reproduction data of about 0.4 seconds to about 1.0 seconds, and includes a plurality of data such as a management information pack, a moving image pack, an audio pack, and a sub-picture pack, as indicated by the arrows in FIG. The type of pack data 604 is included. In the example shown in FIG. 4, the management information pack is represented by symbols P1 and P2, and the moving image pack is represented by video 1, video
eo 2, video 3, video 4, and the audio pack is audio A-1,
audio B-1, audioC-1, audio
A-2, audio B-2, audio C-2, and the sub-picture packs are SP A-1, SP
It is represented by the symbols B-1, SP A-2, and SP B-2.

Each of the pack data has a data size of 2 KB. By re-integrating a plurality of pack data for each type, a digital data string containing only moving image data, a digital data string containing only audio data, a digital data string containing only sub-picture data, and digital data containing only control data Each column is obtained. In this way, a digital data string obtained by reintegrating a plurality of pack data for each type is referred to as an elementary stream.

The VOB 602 may be called a program stream including a plurality of elementary streams or a system stream. One VOB 602
Can have one moving image elementary stream, up to eight audio elementary streams, and up to 32 sub-video elementary streams. Note that the moving image elementary stream may be referred to as a main stream of the system stream, and the audio elementary stream and the sub-video elementary stream may be referred to as a substream of the system stream.

The pack data includes a header section and a data section. In the header of the pack data, identification information indicating the type of the pack data is stored. By referring to the identification information, it is possible to identify whether the pack data is a “video pack”, an “audio pack”, a “sub-picture pack”, or a “management information pack”. it can.

The data part of the moving image pack stores data compressed by the MPEG system. One VOBU60
3 is G which is image data for about 12 to 15 frames.
Moving image data is stored in units of OPs (Group Of Pictures).

The data section of the audio pack stores audio data corresponding to the moving image data of the VOBU 603 containing the audio pack. The moving image data and the audio data included in the same VOBU 603 are reproduced synchronously. As the type of audio data, there is linear PCM or Dolby-AC3 sampled at a frequency of 48 kHz (for Dolby-AC3, ATSC stan
dard Digital audio Compre
session (AC-3) (Doc. A / 52, 20 D
ec, 1995)). In the header part of the audio pack, audio sub-stream identification information indicating which audio sub-stream belongs to up to eight audio sub-streams is further stored.

The data portion of the sub-picture pack stores graphics data that has been run-length compressed. The sub-picture pack header further stores sub-picture sub-stream identification information indicating which sub-picture sub-stream among the maximum 32 sub-picture sub-streams.

The data section of the management information pack stores address information for special reproduction such as fast forward and control data for accepting user interaction. Control data for accepting user interaction includes, for example, menu information for displaying a menu. The menu information includes information indicating the positions of up to 32 menu items, information indicating the colors of the menu items, and information indicating a control command to be executed when one of the menu items is selected by the user.

FIG. 5 shows an example of a menu. In the example shown in FIG. 5, the menu 50 has eight menu items 51 to 58 indicating information to be reproduced next. The menu information defines the position of the menu item, the color of the menu item, and the control command to be executed when the menu item is selected for each of the eight menu items 51 to 58. One of the eight menu items 51 to 58 is selected by the user.

The graphics data for displaying the menu is stored in the sub-picture pack. The user selects one of the menu items, or
When the user confirms the selected menu item, the color of the graphics corresponding to the selected menu item is changed according to the position information and the color information of the management information pack.

When the user confirms the selected menu item, the control command corresponding to the menu item is executed. In this way, the branch reproduction control is executed according to the instruction from the user.

In order to simplify the explanation, in the example shown in FIG. 4, the pack data included in the VOBU 603 is arranged with a certain regularity. However, the arrangement of each pack data does not need to be regular except that the management information pack is arranged at the head of the VOBU 603. For example, each pack data need not be arranged for each type of pack data, and may be arranged so that the types of pack data are mixed. This is because the disk reproducing device once buffers the pack data in the buffer unit and then reads the pack data from the buffer unit. Also, the total number of pack data included in the VOBU 603 and the number of pack data for each type of pack data need not be constant. This is because moving image data, audio data, and sub-picture data can be variable-length compressed data. In practice, each VOBU 603 includes a different number of pack data.

Further, in the example shown in FIG.
The number of moving image packs included in 03 is two. But,
Actually, the number of moving image packs included in the VOBU 603 can be several hundred. This is because the transfer rate of the moving image data to the disk reproducing device is about 4.5 Mbit.

(3.1.2) Data Structure of Video Title Set Information 601 The video title set information 601 includes information for managing the reproduction order of the VOB 602. Here, VOB602
Data specifying the playback order of the program chain (P
GC). VOB602 by different PGCs
Can be defined.

FIG. 6 shows video title set information 601.
Shows the data structure of. As shown in FIG. 6, the video title set information (VTSI) 601 includes a VTS management table (VTSI_MAT) 611 and a video title set section title search pointer table (TT_SR).
PT) 612 and a PGC management information table (PGCI)
T) 613.

The VTS management table 611 is header information of the video title set information 601. The VTS management table 611 includes a pointer indicating the storage position of the video title set section title search pointer table 612 and a pointer indicating the storage position of the PGC management information table 613.

The video title set section title search pointer table 612 includes the number of pointers 621 and a plurality of start PGC numbers 622. Starting PGC number 622
Is a PGC to be executed first among a plurality of pieces of PGC information 631 stored in the PGC management information table 613.
An index indicating the information 631. The start PGC number 622 is specified for each title. For example, when the value of the start PGC number 622 corresponding to title # 1 is “3”, it means that PGC information # 3 is executed first for title # 1.

The PGC management information table 613 includes a plurality of PGC information 631 (PGC information # 1 to PGC information #n).
including. PGC information 631 includes one or more VOBs 602
And its playback order on the disc.
It is also possible to describe the reproduction of the same VOB 602 by different PGC information 631. Therefore, the same VO
A plurality of reproduction orders can be specified for B602. For example, if PGC information 631 is VOB # 1, VO
VOB 602 in the order of B # 2, VOB # 3, VOB # 4
Is defined to be played back, VOB 602
Are reproduced in the order of VOB # 1, VOB # 2, VOB # 3, and VOB # 4. Also, PGC information 631 is VOB #
3, VOB # 2, VOB # 1, and VOB # 4 in this order.
If it is defined to play B602, VO
B602 is VOB # 3, VOB # 2, VOB # 1, VO
Playback is performed in the order of B # 4.

The PGC information 631 contains the PGC connection information 64
1 and one or more VOB addresses 642.

The PGC link information 641 includes PGC information 6
An index of PGC information 631 linked before and after 31 is stored. For example, the PGC of the PGC information # 3
The connection information 641 includes an index of PGC information 631 (for example, PGC information # 1) connected before PGC information # 3, and a PGC information 631 (for example, PGC information # 5) connected after PGC information # 3. ) Is stored. The disc reproducing apparatus has one PGC information 6
When the reproduction by the PGC 31 is completed, the next PGC information 631 is determined according to the PGC connection information 641 and the reproduction control is continued according to the next PGC information 631.

The VOB address 642 indicates the VO to be reproduced.
B602 is information indicating the position on the optical disc. The order of the VOB addresses 642 in the PGC information 631 indicates the order of reproduction by the disk reproducing device.

(3.2) Data Structure of Video Manager Information 700 The video manager information 700 is information for reproduction control which is first referred to when an optical disk is reproduced mainly by video by a disk reproducing apparatus.

FIG. 7 shows the data structure of the video manager information 700.

The data structure of video manager information 700 conforms to the data structure of video title set 600 shown in FIG. The difference between the VOB of the video manager information 700 and the VOB of the video title set 600 is that the VOB of the video manager information 700 is specialized for the volume menu.

Here, the volume menu is a menu for displaying a list of all the titles recorded on the optical disc and for allowing the user to select any one title. The volume menu is displayed on the screen immediately after the optical pickup is moved from the volume file management area 32a of the optical disc to the video zone area 32b after the optical disc is loaded into the disc reproducing apparatus.

As shown in FIG. 7, the video manager information (VMGI) 700 includes a menu video object 703, a menu PGC management information table (PGCIT) 701, and a title search pointer table (TT_SRPT) 702. .

The menu video object 703 is
As its name suggests, VO specialized for volume menus
B. The menu video object 703 includes a sub-picture pack for displaying a volume menu and a management information pack for performing playback control according to a cursor operation or a determination operation on the volume menu.

Menu PGC management information table 701
Is PGC information specialized for a volume menu. The storage location of the menu video object 703 is described in the menu PGC management information table 701 so that the menu video object 703 is read out when the optical disc is loaded into the disc playback device. The PGC information indicates that after the optical disc has been loaded into the disc reproducing apparatus, the optical pickup moves from the volume / file management area 32a to the video zone area 32b.
Immediately after moving to, the data is read by the disk reproducing device. Thereby, a volume menu is displayed on the screen.

Title search pointer table 702
Indicates the number of the video title set to which each title belongs (that is, the VTS number 721) and the index 712 for specifying the title number assigned to each title in the video title set (that is, the VTS title number 722). Including.

(4) Data Structure of Audio Zone Area 32c The audio zone area 32c contains audio manager information 900 and one or more audio title sets 8
00 is stored.

(4.1) Audio title set 80
Data Structure of 0 FIG. 8A shows the data structure of the audio title set 800. The audio title set 800 includes a plurality of audio objects (hereinafter, referred to as AOBs) 802.
Audio title set information (ATSI) 801 for managing the reproduction order of a plurality of AOBs 802; and audio title set information backup (ATS)
I_BUP) 804. In the following description,
An audio title set may be abbreviated as ATS.

(4.1.1) Data Structure of AOB 802 The AOB 802 is packetized in 2 KB. The AOB 802 stores data in LPCM, AC3, MPEG audio, DTS or SDDS format (for MPEG audio, ISO / I
EC DIS 13818-3: July, 1996.
See For DTS, see DTS Coherent
Acoustics "Delivering hi
gh quality multichannel s
"ound to the consumer" Pre
sent at the 100th Conve
ntion 1996 May 11-14 Cope
See nhagen AES. For SDDS, S
DDS Specification for Dis
c (Version 1.0) -Digital au
dio multi-channel coding
See Sony Corporation). LPCM
In the case of, the sample bits are either 16, 20, or 24 bits, the sampling frequency is 48 kHz,
96 kHz, 192 kHz, 44.1 kHz, 88.2
kHz or 176.4 kHz.

(4.1.2) Data Structure of Audio Title Set Information 801 The audio title set information 801 is composed of AOB 802
Contains information for managing the playback order. The reproduction order of the AOB 802 is specified by a program chain (PGC), similarly to the VOB 602. Different PGCs may define different playback orders of AOB 802.

As shown in FIG. 8A, audio title set information (ATSI) 801 includes an ATS management table (ATSI_MAT) 811 and an ATS program chain information table (ATS_PGCIT) 812.

The ATS management table 811 is header information of the audio title set information 801. ATS
The management table 811 includes a pointer indicating the storage area of the ATS program chain information table 812 and AOB8.
02 and a pointer indicating the storage area No. 02 are stored.

The ATS management table 811 includes an ATS identifier (ATSI_ID) 821 and ATS address information 8
22, an ATS version number 823, an audio attribute (AOTT_AOB_ATR) 824, and a downmix coefficient 825.

The ATS identifier 821 stores a character string indicating an ATS.

The ATS address information 822 will be described later.

The ATS version number 823 stores the version number of a rule that defines the data structure of the audio title set information 801.

The audio attribute 824 stores the attributes of eight types of audio streams. Each AOB included in one audio stream title set 800
802 is reproduced according to any one of the attributes of the eight types of audio streams. The audio attribute 824 includes an audio coding mode 841, a quantization bit number 842, a sampling frequency 843, and a multi-CH
Attribute 844.

In the audio coding mode 841, a code indicating either the LPCM or the compression method is described. The quantization bit number 842 includes 16 bits, 20 bits, and 2 bits.
A code indicating any of the four bits is described. The sampling frequency 843 includes 48 kHz, 96 kHz, 1
92 kHz, 44.1 kHz, 88.2 kHz, 17
A code indicating any of 6.4 kHz is described. In the multi-CH attribute 844, a code indicating how to use each channel in the case of multi-CH is described. In addition,
A value “0” is stored in an unused field of the audio attribute 824.

[0091] The downmix coefficient 825 stores 16 types of coefficients used when downmixing each channel of the multi-channel to 2CH. Program chain information (ATS_PGCI) 833 described later
, One of the 16 types of coefficients stored in the downmix coefficient 825 is selectively referred to from the ATS program information (ATS_PGI) 862. In this way, the downmix coefficient can be changed for each program.

As shown in FIG. 8A, ATS program chain information table 812 includes ATS program chain information table information (ATS_PGCITI) 83.
1, a plurality of ATS program chain information search pointers (ATS_PGCI_SRP) 832, and a plurality of ATSs.
TS program chain information (ATS_PGCI) 83
3 is included.

The ATS program chain information table information 831 describes the number of ATS program chain information search pointers 832 and the last address of the ATS program chain information table 812. The ATS program chain information table information 831 is used to help search for the ATS program chain information search pointer 832.

The ATS program chain information search pointer 832 is provided in the ATS_PGC category (ATS_PGC_ATS) that describes the title number and the PGC attribute in the ATS.
CAT) 851 and an ATS_PGC start address (ATS_P) indicating the storage location of the ATS program chain information.
GCI_SA) 852.

The ATS program chain information 833 includes:
ATS_PGC general information (ATS_PGC_GI) having reproduction time and address information of this program chain
861 and a plurality of ATS cell playback information (A
TS_C_PBI) 863 and a plurality of ATS program information (ATS_PGI) 862.

Each of the plurality of ATS program information 862 includes a stream number 881 and a number of a downmix coefficient used when downmixing from multi-channel to two channels (that is, a downmix coefficient 825 of the ATS management table 811). A downmix coefficient number 882 indicating one of 16 kinds of included coefficients) and a plurality of ATs included in the program.
Entry cell number (ATS_PG_EN_CN) indicating the number of the ATS cell to be reproduced first among the S cells
883 and a PG playback time (ATS_PG_PB_TM) 884 which is the playback time of the program.

[0097] The stream number 881 is a number for specifying one of eight types of audio stream attributes defined by the audio attribute 824 of the ATS management information table 811. The audio stream is played according to the audio stream attribute specified by the stream number 881. In this way, an audio stream can be reproduced according to audio attributes that differ for each program.

As described above, the ATS program chain information 833 describes the storage positions of one or more AOBs 802 on the disk and the reproduction order. Different ATS
The same AOB80 according to the program chain information 833
It is also possible to describe the reproduction of 2. Therefore, it is possible to specify a plurality of reproduction orders for the same AOB 802. For example, the ATS program chain information 833 includes AOB # 1, AOB # 2, AOB # 3, AOB
When it is defined that the AOB 802 is reproduced in the order of # 4, the AOB 802 is composed of AOB # 1, AOB #
2, AOB # 3 and AOB # 4 are reproduced in this order. AT
S program chain information 833 is AOB # 3, AOB
When it is defined that the AOB 802 is reproduced in the order of # 2, AOB # 1, and AOB # 4, the AOB 802 is reproduced in the order of AOB # 3, AOB # 2, AOB # 1, and AOB # 4. .

Note that the audio title set 800 includes a type that points to the AOB 802 (AOB point type) and a VOB 6 that replaces the AOB 802.
02 (VOB point type). The data structure shown in FIG. 8A is the data structure of AOB point type audio title set 800.

FIG. 8B shows the data structure of a VOB point type audio title set 800. FIG. 8B
The data structure shown in FIG.
The data structure is the same as that shown in FIG. 8A, except that 00 does not have a plurality of AOBs 802. However, each attribute information includes a description unique to the VOB 602.

Specifically, the ATS address information 822 of the ATS management table 811 describes the address information of the VTS 600 to which the VOB 602 belongs and the address information of the VOB 602. In the audio attribute 824 of the ATS management table 811, an audio attribute defined by the VOB 602 is described, and a description of a stream ID 845 that specifies a substream to be reproduced among the substreams included in the VTS 600 is added. The sampling frequency 843 of the audio attribute 824 is 48k
Hz or 96 kHz. The voice coding mode 841 includes LPCM, AC3, MPEG
Any code of audio, DTS, and SDDS can be described. The downmix coefficient 825 of the ATS management table 811 is filled with a value “0”. this is,
This means that the downmix coefficient 825 is not used.

A code defined by VOB 602 is described in the audio coding mode 875 of the ATS_PGC category 851.

The ATS cell start address (ATS_C_SA) 893 and the ATS cell end address (ATS_C_EA) 894 of the ATS cell reproduction information 863 have the VOB 60
The address of the second cell is described.

FIG. 8C shows the data structure of ATS address information 822.

The ATS address information 822 includes the last address 822a of the audio title set 800 and the last address 822 of the audio title set information 801.
b and the last address 822 of the ATS management table 811
c and the start address 82 of the video title set 600
2d, the start address 822e of the object area,
And the start address 822f of the ATS program chain information table 812. In FIG. 8C, the arrow from ATS address information 822 indicates the location indicated by the address.

Audio title set 800 is AOB
In the case of the point type (FIG. 8A), the start address 822d of the video title set 600 of the ATS address information 822 is filled with the value “0”. If the audio title set 800 is of the VOB point type (FIG. 8B), the start address 822d of the video title set 600 in the ATS address information 822 indicates the video title set 600 to which the VOB 602 belongs.
Is stored. Therefore, when the value “0” is stored in the field 822d of the ATS address information 822, the audio title set 800
Is an AOB point type, otherwise the audio title set 800 is a VOB point type.

As described above, the audio title set 8
Whether 00 is the AOB point type or the VOB point type can be identified by referring to the field 822d of the ATS address information 822.

If the audio title set 800 is of the AOB point type, the start address of AOB # 1 is stored in the start address 822e of the object area. Audio title set 800 is V
In the case of the OB point type, the start address of VOB # 1 is stored in the start address 822e of the object area.

As described above, the playback order of the AOB 802 or the VO
The playback order of B602 is determined.

(4.2) Audio Manager Information 90
Data structure of 0 The audio manager information 900 is information for reproduction control which is first referred to when the optical disk is reproduced mainly by audio by the disk reproducing device.

FIG. 9 shows the audio manager information 900.
Shows the data structure of.

Audio manager information (AMGI) 9
00 is an audio manager information management table (AM
GI_MAT) 901, an audio title search pointer table (ATT_SRPT) 902, and an audio only title search pointer table (AOT).
T_SRPT) 903 and an audio manager menu PGC management information table (AMGM_PGCI_U)
T) 904 and an audio text data manager (ATXTDT_MG) 905.

Audio manager information management table 9
01 stores the attributes of the audio manager information 900 and the address information of various tables.

The audio title search pointer table 902 includes audio title search pointer table information (ATT_SRPTI) 911 and a plurality of audio title search pointers (ATT_SRP) 912.
And

[0115] The audio title search pointer table information 911 stores the number of audio titles and the last address of the audio title search pointer table 902.

Audio title search pointer 912
Stores different information between the case where the title of the ATS is specified and the case where the title of the VTS is specified. AT
When the title of the S is designated, the audio title search pointer 912 includes the ATS number 934, the ATS
Title number 935 and ATS start address 936
Are respectively stored. When the title of the VTS is specified, the audio title search pointer 912 includes the VTS number 942, the title number 943 in the VTS,
The VTS start address 944 and the angle number 941 are stored, respectively.

Audio title search pointer 912
Audio title category 931 is AOTT / A
A VTT flag 961, a menu regression flag 962,
ATT group number 963.

To specify an ATS title, A
A code indicating AOTT is stored in the OTT / AVTT flag 961. When specifying the title of the VTS, a code indicating AVTT is stored in the AOTT / AVTT flag 961.

[0119] The menu return flag 962 stores a flag indicating whether or not to return to the menu after reproducing the designated title.

The ATT group number 963 stores the number of the title group to which the specified title belongs. Here, the title group is a concept for guaranteeing that a plurality of titles belonging to the same title group are continuously reproduced. ATT group number 96
Reference numeral 3 is provided for continuously reproducing a plurality of titles without performing reproduction control based on complicated navigation information.

The audio title search pointer table 902 is referred to by an audio player having a video function.

The audio title search pointer table 903 has the same data structure as the audio title search pointer table 902. However, the title of the VTS is not specified using the audio-only title search pointer table 903.

The audio-only title search pointer table 903 is referred to by an audio player that outputs only audio.

[0124] In the audio manager menu PGC management information table 904, a menu reproduction order is described.

Audio text data manager 90
5 stores information for displaying character information.

Hereinafter, a reproducing apparatus for reproducing information stored on the DVD 100 will be described.

FIG. 10 shows the appearance of a DVD player 1 as a playback device of the DVD 100, a television monitor 2 connected to the DVD player 1, and a remote controller 91.

The DVD player 1 has an opening on the front surface of the housing. In the depth direction of the opening, DVD100
A drive mechanism (not shown) for loading the data is provided.

On the front of the DVD player 1, a remote control receiving section 92 having a light receiving element for receiving infrared rays from the remote controller 91 is provided. When the user operates a key of the remote controller 91, infrared rays corresponding to the key input from the user are emitted from the remote controller 91. Remote control receiver 92
Generates an interrupt signal indicating that the key signal of the remote controller 91 has been received in response to the received infrared rays.

A video output terminal 95 and an audio output terminal 96 are provided on the back of the DVD player 1. By connecting an AV code to these output terminals, a video signal reproduced from the DVD 100 can be output to the large television monitor 2 for home use. In this way, the user can enjoy the video reproduced from the DVD 100 on a large-sized home television such as a 33-inch or 35-inch television.

As will be understood from the above description, the DVD
The player 1 is not used by being connected to a computer device such as a personal computer, but is used by being connected to a television monitor 2 as a household electric appliance.

The remote controller 91 has a plurality of keys on the operation panel which are biased by a spring on the surface of the housing, and outputs a code corresponding to the pressed key by infrared rays.

FIG. 11 shows the operation panel 91 of the remote controller 91.
a. Various operation keys are provided on the operation panel 91a.

The “POWER” key 192 is used for turning on / off the power of the DVD player 1.

An "A-MODE" key 193 is used to designate a playback mode mainly composed of voice. "A-MO
When the “DE” key 193 is pressed, the remote controller 91 displays a code indicating the audio-based playback mode on the DVD player 1.
Transfer to

A "V-MODE" key 194 is used to designate a video-based playback mode. "V-MO
When the “DE” key 194 is pressed, the remote controller 91 displays a code indicating the video-based playback mode on the DVD player 1.
Transfer to

The “MENU” key 195 is used to call up the volume menu of the DVD 100 while reproducing the video information or the audio information according to the program chain.

The ten keys 197 are used to instruct a chapter jump in a movie, a selection of a song in music, and the like.

The cursor keys 198 are used to move the cursor up, down, left, and right to select an item.

The "ENTER" key 196 is used to confirm the item selected by the cursor. If your cursor is over an item,
The item is displayed in the select color of the item color information of the management information pack. When the selection of the item is confirmed by pressing the “ENTER” key 196, the item is displayed in the confirmed color of the item color information of the management information pack.

A key 199 is used to perform operations such as "play", "stop", "pause", "fast forward" and "rewind".
Used to instruct the VD player 1. Key 1
99 is a key common to other AV devices.

FIG. 12 shows a configuration of the DVD player 1 according to the embodiment of the present invention. As shown in FIG.
The VD player 1 includes a drive mechanism section 16, a signal processing section 84, an AV decoder section 85, an audio decoder section 94, a remote control receiving section 92 for receiving a signal from a remote controller 91, and a system control section 93. .

The drive mechanism 16 includes a base (not shown) on which the DVD 100 is set, and a DVD set on the base.
And a motor 81 for rotating the motor 100 by clamping it. The motor 81 is, for example, a spindle motor.
The base on which the DVD 100 is set is moved into and out of the housing by an ejection mechanism (not shown). The user sets the DVD 100 on the base with the base moved to the outside of the housing. Then, the base on which the DVD 100 is set moves to the inside of the housing. In this way, DVD1
00 is loaded in the DVD player 1.

The drive mechanism 16 includes a mechanism controller 8 for controlling a mechanism system including a motor 81 and an optical pickup 82.
3 is further included. The optical pickup 82 is a DVD 100
Read the signal stored in.

The mechanism control unit 83 adjusts the speed of the motor 81 according to the track position specified by the system control unit 93. Further, the mechanism control unit 83 includes the optical pickup 8
The movement of the position of the optical pickup 82 is controlled by controlling the second actuator (not shown). When the accurate position of the track is detected by the servo control, the mechanism control unit 83 waits for rotation until a desired physical sector is stored, and continuously reads a signal from the desired physical sector.

The signal processing section 84 performs processing such as amplification, waveform shaping, binarization, demodulation, and error correction on the signal read from the optical pickup 82. Optical pickup 82
The signal read by is converted into digital data and stored in the buffer memory 93a in the system control unit 93 in units of logical blocks.

The AV decoder 85 receives the input VOB
A predetermined process is performed on the digital data 602, and the digital data is converted into a video signal and an audio signal. The video signal and the audio signal are output from the AV decoder 85.

The AV decoder 85 includes a system decoder 86, a video decoder 87, and a sub-picture decoder 88.
, An audio decoder 89 for an AV decoder, and a video synthesizing unit 90.

The system decoder unit 86 receives digital data transferred in units of logical blocks (packets) from the buffer memory 93a of the system control unit 93, and determines the stream ID and substream ID in the header of each packet. Thus, a moving image data pack, a sub-picture data pack, an audio data pack, and a management information pack are sorted. In this distribution, the moving image data pack is output to the video decoder 87. With respect to the audio data pack and the sub-video data pack, only the sub-video data pack and the audio data pack having the specified stream number are sent according to the decode stream designation command input from the system control unit 93, respectively. It is output to the audio decoder 89 for the AV decoder. The management information pack is output to the system control unit 93.

The moving picture data pack input to the video decoder 87 is decompressed according to a predetermined method defined by MPEG2, and is output to the video synthesizing section 90 as digital video data.

The sub-picture data pack input to the sub-picture decoder 88 is expanded according to the run-length method, and is output to the picture synthesizing section 90 as digital picture data.

The digital video data output from the video decoder 87 and the digital video data output from the sub-video decoder 88 are video-synthesized by the video synthesis unit 90 and then converted into an NTSC video signal. The video signal is supplied to D through a video output terminal 95 (FIG. 10).
Output to the outside of the VD player 1.

The audio data pack input to the audio decoder 89 for the AV decoder is decoded by one of LPCM and compressed audio such as AC3 according to the data type, and D / A converted. As a result, an audio signal is obtained. The audio signal is supplied to a DVD via an audio output terminal 96 (FIG. 10).
Output to the outside of the player 1.

[0154] The audio decoder section 94 performs predetermined processing on the input AOB 802 digital data in accordance with the data type. As a result, an audio signal is obtained. The audio signal is output to the outside of the DVD player 1 via the audio output terminal 96 (FIG. 10).

The system control section 93 includes a CPU 93b for controlling the entire DVD player 1 and various working memories.

Next, the operation of the DVD player 1 having the above configuration will be described.

"V-MODE" key 19 on remote controller 91
When 3 is pressed by the user, an infrared signal indicating a video-based playback mode is transmitted from the remote controller 91 to the DVD player 1. The infrared signal from the remote control 91 is
The data is received by the remote control receiver 92 of the DVD player 1 and analyzed there. As a result, a code indicating a video-based playback mode is held in the playback mode holding unit 93c in the system control unit 93.

"A-MODE" key 19 on remote controller 91
Similarly, when the button 4 is pressed by the user, the code indicating the playback mode mainly composed of audio is held in the playback mode holding unit 93c of the system control unit 93.

The system control section 93 includes a reproduction mode determination section 93d. The reproduction mode determination unit 93d
At the start of the playback of 0, it is determined whether the playback mode is the video-based playback mode or the audio-based playback mode by referring to the code held in the playback mode holding unit 93c. The function of the reproduction mode determination unit 93d can be realized by, for example, a program executed by the CPU 93b.

Note that the above-mentioned reproduction mode is not always switched according to the input from the user.

For example, when the disc reproducing device is a portable device having an openable / closable liquid crystal display panel, the reproducing mode may be automatically switched according to the open / closed state of the liquid crystal display panel. For example, when the liquid crystal display panel is in the open state, the playback mode is switched to the video-based playback mode, and when the liquid crystal display panel is in the closed state, the playback mode is switched to the audio-based playback mode. Such control is achieved by inputting a control signal indicating the open / close state of the liquid crystal display panel to the reproduction mode determination unit 93d and operating the reproduction mode determination unit 93d in response to the control signal.

Further, the playback mode may be automatically switched according to the connection state of the video output terminal. For example, when an AV code is connected to the video output terminal, the playback mode is switched to a video-based playback mode. When no AV code is connected to the video output terminal, the playback mode is switched to an audio-based playback mode. Switch to playback mode. In such control, a control signal indicating the connection state of the video output terminal is input to the reproduction mode determination unit 93d,
This is achieved by operating the reproduction mode determination unit 93d in response to the control signal.

Further, the reproduction mode may be automatically switched according to the presence or absence of the output of the video signal. For example, when a video signal is output to the video output terminal, the playback mode is switched to a video-based playback mode. When no video signal is output to the video output terminal, the playback mode is switched to an audio-based playback mode. Switch to playback mode. In such control, the presence or absence of the output of the video signal at the video output terminal is detected, a control signal indicating the detection result is input to the reproduction mode determination unit 93d, and the reproduction mode determination unit 93d is responded to the control signal. Achieved by operating.

Further, when the disc reproducing apparatus is an on-vehicle apparatus, the reproducing mode may be automatically switched according to the running state of the vehicle. For example, when the vehicle is stopped, the playback mode is switched to a video-based playback mode, and when the vehicle is running, the playback mode is switched to an audio-based playback mode. Such control is achieved by inputting a control signal indicating the running state of the vehicle to the reproduction mode determination unit 93d and operating the reproduction mode determination unit 93d in response to the control signal. Whether the vehicle is stopped or not can be detected, for example, by detecting a state of a side brake or a state of a gear lever. In the case of an automatic car,
If the gear lever is parked,
It is determined that the vehicle is in a stopped state.

FIG. 13A shows a procedure of a reproducing process in a video-based reproducing mode. Here, it is assumed that the playback mode is determined to be a video-based playback mode before the playback processing shown in FIG. 13A is executed.

In step S131, the optical disc is
It is determined whether the D player 1 is loaded.
Such a determination is performed by the system control unit 93 according to a signal from the optical sensor, for example.

If it is determined that the optical disk is loaded in the DVD player 1, the system controller 93
Controls the rotation of the disk by controlling the mechanism control unit 83 and the signal processing unit 84, and performs an initialization operation for seeking the optical pickup 82 to the lead-in area 31 (FIG. 3). Thus, the reproduction process is started.

In step S132, video manager information 700 (FIG. 3) is read from video zone area 32b (FIG. 3). This reading is performed based on the information read from the volume / file management area 32a (FIG. 3).

The system control unit 93 controls the menu PGC management information table 701 of the video manager information 700.
By referring to FIG. 7 (step S133),
The address of the volume menu program chain information is calculated (step S134), and the volume menu program chain information is read out based on the address, and stored in the system control unit 93 (step S135).

The system control unit 93 refers to the stored volume menu program chain information, and thereby the menu VOB 703 to be reproduced first.
The address of (FIG. 7) is calculated (step S136), and the VOB 703 for menu (FIG. 7) is reproduced based on the address (step S137). Thereby, a video menu is displayed (step S138). This video menu is used to select the title that the user wants to play.

FIG. 15 shows a display example of a video menu.
The user can select “MovieA”, “MovieB”, “M
vieC ". For example, the user presses a key of the remote controller 91 (FIG. 10) corresponding to a menu item desired to be selected from a plurality of displayed menu items. In this way,
One of a plurality of menu items is selected (step S139).

The system control unit 93 includes the remote control receiving unit 9
2 (FIG. 12), the information indicating the selected menu item (for example, the number of the menu item) is received. The management information pack included in the VOB of the video menu being reproduced is input to the system control unit 93 from the AV decoder 85. The system control unit 93 executes the control command corresponding to the selected menu item number by referring to the management information pack (step S140).

The control command is, for example, “TitlePl” indicating “Reproduce title of title number n”.
ay #n "command.

The system control unit 93 executes the “TitlePlay #n” command by calling the “Title Play #n” subroutine in the video-based play mode (step S141).

In step S142, it is determined whether to return to the video menu shown in FIG. Step S1
If the determination at 42 is "Yes", the process proceeds to step S1.
Returning to 33, if the determination in step S142 is "No", the reproduction process ends.

FIG. 13B shows a procedure of a reproducing process by a subroutine "Reproduction of title in video-based reproducing mode".

[0177] The system control unit 93 obtains the title search pointer table 702 from the video manager information 700.
(FIG. 7) is read (step S151).

The system control unit 93 obtains the VTS number 721 (FIG. 7) and the title number 722 in the VTS (FIG. 7) by referring to the title search pointer 712 (FIG. 7) corresponding to the title number n. (Step S
152).

The system control unit 93 has a VTS number 721
The video title set section title search pointer table 612 (FIG. 6) is read from the video title set 600 (FIG. 6) corresponding to (step S153).

The system control unit 93 calculates the address of the PGC information 631 (FIG. 6) to be executed first by referring to the start PGC number 622 (FIG. 6) corresponding to the title number 722 in the VTS (FIG. 6). Step S15
4) The PGC information 631 is read based on the address, and is stored in the system control unit 93 (step S155).

The system control section 93 has PGC information 631
, The VOB address 642 (FIG. 6) is obtained (step S156), and the VOB 602 is
Is reproduced (step S157).

At step S158, whether or not the last VOB 602 to be reproduced is determined. If the determination in step S158 is “Yes”, the process proceeds to step S159, and if the determination in step S158 is “No”, the process returns to step S156.

At step S159, whether or not the last PGC information 631 to be reproduced is determined. This determination is made by referring to the PGC connection information 641 (FIG. 6). If the determination in step S159 is “Ye
If “s”, the process proceeds to step S142 of FIG. 13A, and if the determination in step S159 is “No”, the process returns to step S154.

[0184] VOB reproduced by PGC information
Corresponds to a menu that branches the playback progress, the menu items are displayed by the video data included in the VOB to be played back, similarly to the menu display based on the video manager information described above. A control command activated by user interaction is stored in the management information pack of the VOB. Therefore, when the user interaction is received by the operation of the remote controller or the like, the system control unit 93 executes the control command of the management information pack of the VOB. Thereby, branch regeneration control is performed.

Although not shown in FIG.
The D player 1 is provided with a switching key for switching between an audio channel and a sub-video channel. The audio channel and the sub-video channel selected by the user using the switching key are held in a register (not shown) in the system control unit 93. When the VOB is reproduced, the system control unit 93 specifies a valid channel to the AV decoder unit 85 by referring to the register. Such designation is made by the system controller 9.
3 to the AV decoder 85 by outputting a control signal. As a result, only valid audio channel and sub-video channel information is output to the outside together with the moving image information.

FIG. 14A shows the procedure of the reproduction process in the reproduction mode mainly composed of voice. Here, it is assumed that the playback mode is determined to be a voice-based playback mode before the playback process shown in FIG. 14A is executed.

At step S161, the optical disc is
It is determined whether the D player 1 is loaded.
Such a determination is performed by the system control unit 93 according to a signal from the optical sensor, for example.

When it is determined that the optical disk is loaded in the DVD player 1, the system control unit 93
Controls the rotation of the disk by controlling the mechanism control unit 83 and the signal processing unit 84, and performs an initialization operation for seeking the optical pickup 82 to the lead-in area 31 (FIG. 3). Thus, the reproduction process is started.

In step S162, the audio manager information 90 is read from the audio zone area 32c (FIG. 3).
0 (FIG. 3) is read. This reading is performed based on the information read from the volume / file management area 32a (FIG. 3).

The system control unit 93 refers to the audio-only title search pointer table 903 (FIG. 9) of the audio manager information 900 (step S163), and according to the entry order in the audio-only title search pointer table 903, the ATS number 954. And the title number 955 in ATS is acquired (step S164).

The system control unit 93 reproduces the title specified by the ATS number 954 and the title number 955 in the ATS by calling the “reproduction of title in reproduction mode mainly composed of voice” subroutine (step S165).

At step S166, it is determined whether or not the title is the last title to be reproduced. Step S1
If the determination at 66 is “Yes”, the reproduction process ends. If the determination in step S166 is “No”, the process returns to step S163.

FIG. 14B shows a procedure of a reproducing process by a subroutine "Reproduction of title in audio-based reproduction mode".

The system control unit 93 specifies the designated ATS
Audio title set 800 corresponding to number 954
Then, the audio title set information 801 (FIG. 8A) is read from (step S171).

The system control unit 93 reads the ATS program chain information table 812 from the audio title set information 801 (step S172),
The ATS program chain information search pointer 832 is read out according to the entry order in the S program chain information table 812 (step S173).

The system control unit 93 searches the ATS_PGC category 851 of the ATS program chain information search pointer 832, and
Title number 955 is ATS_PGC category 851
It is determined whether or not it matches the ATS title number 872 (step S174).

If the determination in step S174 is "Yes", the process proceeds to step S175, and the process proceeds to step S17.
If the determination of No. 4 is “No”, the process proceeds to step S173
Return to In step S173, another ATS program chain information search pointer 832 is read.

The system control unit 93 specifies the designated ATS
The ATS program chain information 833 corresponding to the ATS program chain information search pointer 832 in which the title number 955 is found is read out, and is stored in the system control unit 93 (step S175).

The system control unit 93 acquires ATS program information 862 to be reproduced according to the entry order in the ATS program chain information 833 (step S1).
76) The cell to be reproduced is determined based on the cell number described in the entry cell number 883 of the ATS program information 862.

[0200] The system control unit 93 acquires the ATS cell reproduction information 863 corresponding to the ATS program information 862 (step S177). ATS cell playback information 863
ATS cell start address 893 specifies the address of the cell from which reproduction is to be started, and ATS cell reproduction information 8
The ATS cell end address 894 of 63 designates the address of the cell to end the reproduction.

Based on ATS cell start address 893 and ATS cell end address 894, system control unit 93 calculates the address of the object to be reproduced and offset information for the object (step S).
178) The object is reproduced based on the address and the offset information (step S179).

The specified audio title set 80
If 0 is an AOB point type, the object to be played is AOB802. A on the optical disk
The position of the OB 802 is determined based on the start address 822e (FIG. 8C) of the object area of the ATS address information 822. AOB80 reproduced from optical disc
2 is transferred to the audio decoder unit 94 by the system control unit 93. The audio decoder 94
OB 802 is converted to an audio signal. The audio signal is output outside the DVD player 1.

The specified audio title set 80
If 0 is a VOB point type, the object to be reproduced is VOB 602. V on optical disc
The position of the OB 602 is determined based on the start address 822e (FIG. 8C) of the object area of the ATS address information 822. VOB60 reproduced from optical disk
2 is processed by the system control unit 93 so that the start data and the end data of the VOB 602 are trimmed based on the offset information. The data of the VOB 602 thus processed is transferred to the AV decoder 85.

The system control unit 93 sends a decode media restriction command to the AOB prior to the transfer of the VOB 602 data.
Output to the V decoder unit 85. The AV decoder unit 85
By decoding only the data of the audio pack included in the VOB 602 according to the decode media restriction command, the data of the VOB 602 is converted into an audio signal. The audio signal is output outside the DVD player 1.

Next, referring to FIG. 16A and FIG. 16B, the DVD player 1 in the video-based playback mode will be described.
And the operation of the DVD player 1 in the audio-only playback mode will be described more specifically.

FIG. 16A shows an example of the data content of an application for music with video. This application is a live recording of a singer's concert.

As moving image information 160, VOB # 1-VOB # 1
B # 6 is stored on the optical disc. Audio information 162
AOB # 1 to AOB # 4 correspond to VOB # 1 to VO
B # 6 is stored on the same optical disk as the optical disk on which B # 6 is stored.

VOB # 2 has moving image information of "Song A". Here, “Song A” starts after the time when the audience enters the concert hall at the beginning of the “Song A” time elapses “t1” time.
It is assumed that the performance and the singing of the song continue for "t2" time. VOB # 3 has moving image information of “singer interview”. VOB # 4 has moving image information of "Song B". VOB # 5 has moving image information of "Song C". V
OB # 6 has moving image information of "Song D" which decorates the last of the concert. Here, it is assumed that “Song D” has a content in which the video of the audience leaving the concert hall elapses “t4” time after the performance and singing of the song D have elapsed “t3” time.

[0209] VOB # 1 has moving image information of a video menu displayed at the start of reproduction. This video menu determines which of “Song A”, “Song B”, “Song C”, “Song D” and “Singer Interview” is to be reproduced, and VOB
Used to diverge the playback path.

[0210] Each of VOB # 1 to VOB # 6 has 16-bit sampled LPCM-format audio information and sub-picture information for displaying the caption of the lyrics of the song.

Each of AOB # 1 to AOB # 4 is 2
It has audio information in LPCM format sampled with 4 bits. Thus, each of AOB # 1 to AOB # 4 has audio information of higher audio quality than VOB # 1 to VOB # 6.

[0212] AOB # 1 has audio information of "Song B '". The content of the audio information of "Song B '" is the same as the content of the audio information of "Song B". However, the quality of the audio information of "Song B '" is higher than the quality of the audio information of "Song B".

[0213] AOB # 2 has audio information of "Song C '". The content of the audio information of "Song C '" is the same as the content of the audio information of "Song C". However, the quality of the audio information of "Song C '" is higher than the quality of the audio information of "Song C".

AOB # 3 has audio information of "Song E". AOB # 4 has audio information of “Song F”.

FIG. 16B shows a reproduction path for reproducing the application for music with video shown in FIG. 16A.

In FIG. 16B, reference numeral 164 indicates a reproduction path in a video-based reproduction mode.
Reference numeral 66 denotes a playback path in a playback mode mainly composed of audio.
Each object stored on the optical disk is reproduced along a reproduction path.

In the video-based playback mode, a start menu corresponding to VOB # 1 is displayed prior to the start of playback, and the system waits for input from the user. The user selects one of a plurality of menu items on the start menu. Such a selection is made, for example, by operating a remote controller. Multiple menu items are VOB #
2 to VOB # 6 in advance. VOB corresponding to the menu item selected by the user
Is played. As a result, a video signal and an audio signal corresponding to the reproduced VOB are output.

The reproduction path 164 is defined so as to branch to one of VOB # 2 to VOB # 6 after reproduction of VOB # 1. The reproduction path 164 includes the PGC information 631
(FIG. 6).

When playback is performed along the playback path 164, "Song A" corresponding to VOB # 2 is played back for "T1" without offset, and "Song D" corresponding to VOB # 6 is offset. No playback is performed for "T2" time.

[0220] In the playback mode mainly composed of voice, VOB
# 2, AOB # 1, AOB # 2, VOB # 6, AOB #
3, and are reproduced in the order of AOB # 4. However, VOB #
2. For VOB # 6, only audio information is reproduced,
Video information is not reproduced. As a result, the reproduced VOB
Alternatively, an audio signal corresponding to the reproduced AOB is output.

The reproduction path 166 includes VOB # 2, AOB #
1, AOB # 2, VOB # 6, AOB # 3, AOB # 4
Are reproduced in this order. Reproduction path 1
66 is ATS program chain information 832 (FIG. 8)
A, FIG. 8B).

When playback is performed along the playback path 166, "Song A" corresponding to VOB # 2 is played first. However, "Song A" is cut off at the beginning "t1" time which is not suitable for audio output, and as a result, it is reproduced for "t2" time out of "T1" time. Such a cut of the reproduction time is performed based on the offset information (that is, the ATS cell reproduction information 863 (FIGS. 8A and 8B)). After the reproduction of VOB # 2 ends, "Song B '" corresponding to AOB # 1 is reproduced with higher quality than "Song B". After the reproduction of AOB # 1 ends, "Song C '" corresponding to AOB # 2 is reproduced with higher quality than "Song C". After the reproduction of AOB # 2 ends, "Song D" corresponding to VOB # 6 is reproduced. However, “Song D” is cut by the last “t4” time that is not suitable for audio output, and as a result, is reproduced by “t3” time out of “T2” time. Such a cut of the reproduction time is performed based on the offset information (that is, the ATS cell reproduction information 863 (FIGS. 8A and 8B)). After the reproduction of VOB # 6 ends, A
"Song E" corresponding to OB # 3 is reproduced. AOB # 3
After the reproduction of "Song F" corresponding to AOB # 4 is completed.

FIG. 17 shows an example of a specific data arrangement on an optical disk. In this example, it is assumed that the addresses of the optical disc are arranged in ascending order from top to bottom in the figure.

In the example shown in FIG. 17, the audio zone area 32c is assigned to an address smaller than the video zone area 32b. Alternatively, the audio zone area 32c may be assigned to a larger address than the video zone area 32b.

[0225] In the audio zone area 32c, an audio manager (AMG) and two audio title sets (ATS # 1, ATS # 2) are arranged. The audio manager (AMG) includes audio manager information (AMGI) and an audio manager menu (AMG_Menu).

Audio Title Set (ATS # 1)
Is a VOB point type ATS. Therefore, the audio title set (ATS # 1) includes only the audio title set information (ATSI # 1). The audio title set (ATS # 2) is an AOB point type ATS. Therefore, the audio title set (ATS # 2) is composed of the audio title set information (ATSI # 2) and the audio object (ATS # 2).
# 2 AOBs).

In the video zone area 32b, a video manager (VMG) and a video title set (VTS #
1) are arranged. Video Manager (VMG)
Includes video manager information (VMGI) and a video manager menu (VMG_Menu). The video title set (VTS # 1) includes video title set information (VTSI # 1) and a video object (VTS #
1 VOBs).

Audio manager information (AMGI)
Is the audio-only title search pointer table information (AOT) referenced by the audio-only player.
T_SRPTI) and audio title search pointer table information (ATT_SRPTI) referenced by an audio player with a video function. Audio only title search pointer table information (A
OTT_SRPTI) indicates only audio titles included in ATS # 1 and ATS # 2, while audio title search pointer table information (ATT)
_SRPTI) includes a video manager (V) for playback with video in addition to their audio titles.
The user also designates the title of the MG) (see arrow 171).

Audio title set information (ATSI
# 1) is ATS program chain information (ATS_PGCI # 1, ATS) that defines the order of object reproduction.
_PGCI # 2). Since ATS # 1 has no AOB, ATS program chain information (ATS_PG
CI # 1, ATS_PGCI # 2) indicate a VOB included in VTS # 1. That is, ATS_PGCI
# 1 designates VOB # 2 (see arrow 172) and AOB
TS_PGCI # 2 indicates VOB # 6 (arrow 1
73).

Audio title set information (ATSI
# 2) is ATS program chain information (ATS_PGCI # 1, ATS) that defines the order of object reproduction.
_PGCI # 2). Since ATS # 2 has AOB, ATS program chain information (ATS_PGC
I # 1, ATS_PGCI # 2) is AO of ATS # 2.
Point B. That is, ATS_PGCI # 1 is A
Instruct OB # 1 (see arrow 174), and ATS_PG
CI # 2 indicates AOB # 2 (see arrow 175).

Video title set information (VTSI #
1) includes PGC information (PGCI # 1 to PGCI # 3) that defines the order in which objects are reproduced. The PGC information (PGCI # 1 to PGCI # 3) is the VO of VTS # 1.
B respectively.

FIG. 18 shows the reproduction order of objects in the video-based reproduction mode and the object reproduction order in the audio-based reproduction mode.

In the video-oriented playback mode, the video object (VOB # 1) of the video manager (VMG) is played first. As a result, a start menu corresponding to VOB # 1 is displayed. A desired title is selected according to the input from the user. When a desired title is selected, a title search pointer table (TT_S), which is navigation information of a video manager (VMG).
RPT), the video title set (VTS #)
1) PGC information (PGC # 1, PGC # 2, PGC #
3) is reproduced. According to this navigation information,
"Song A", "Singer interview", "Song B", "Song C", and "Song D" are reproduced.

In the audio-only playback mode, the audio-only title search pointer table (AOT) which is the navigation information of the audio manager (AMG).
T_SRPT), ATT # 1, ATT # 3, A
TT # 4 and ATT # 5 are reproduced in this order. ATT #
1 is VO of VTS # 1 via PGC # 1 of ATS # 1
B # 2 indicates cell # 2. ATT # 3 indicates AOB # 1 via PGC # 1 of ATS # 2. ATT # 4 is A
It points to AOB # 2 via PGC # 1 of TS # 2. ATT
# 5 is transmitted through VGC # 2 of ATS # 1 and VTS # 1
It points to cell # 1 of OB # 6. Therefore, according to the audio-only player, the latter half of "Song A", "Song B '" (high quality), "Song C'" (high quality) and the first half of "Song D" are reproduced. The first half of "Singer Interview" and "Song A" and the second half of "Song D" are not reproduced.

As described above, according to the present embodiment,
Only data suitable for sound reproduction can be selectively reproduced. That is, in the audio-based playback mode, a selection menu that requires user interaction to be played back in the video-based playback mode, or a sound that determines that it is meaningless if the title creator does not play back with the video, such as noise that leaves the audience Data playback can be cut. In this manner, the title creator can provide an optical disc capable of reproducing a title in accordance with a reproduction order selected from the optimum reproduction order in the video-based reproduction mode and the optimum reproduction order in the audio-based reproduction mode. it can.

According to the present embodiment, the user
In the audio-based playback mode, higher-quality sound can be enjoyed than in the video-based playback mode.

In this embodiment, whether the playback mode is a video-based playback mode or an audio-based playback mode is determined at the start of playback. However, the playback mode may be changed during playback. If the playback mode is changed to the video-based playback mode during playback in the audio-based playback mode, the playback order determined first in the audio-based playback mode is maintained even after the playback mode is changed. And the object to be played is a VO
In the case of B, video and audio may be output. In this case, the system controller 93 may be prohibited from outputting a decode media restriction command to the AV decoder 85 during VOB playback.

(Embodiment 2) Hereinafter, reproduction by an audio player with a video function will be described. The configuration of the audio player with the video function is the DV player shown in FIG.
The configuration is the same as that of the D player 1. However, in the audio player with the video function, it is not determined whether the playback mode is the video-based playback mode or the audio-based playback mode before the playback process is executed. An audio player with a video function is positioned as a player obtained by adding a video display function to an audio player dedicated to audio.

FIG. 19 shows the procedure of a reproduction process by an audio player with a video function.

At step S191, it is determined whether or not the optical disk is loaded in the audio player with a video function. Such a determination is made, for example, according to a signal from the optical sensor.

If it is determined that the optical disk is loaded in the audio player with a video function, the rotation of the optical disk is controlled, and an initialization operation for causing the optical pickup to seek to the lead-in area 31 (FIG. 3) is performed. Will be Thus, the reproduction process is started.

At step S192, audio manager information 90 is stored in audio zone area 32c (FIG. 3).
0 (FIG. 3) is read. This reading is performed based on the information read from the volume / file management area 32a (FIG. 3).

At step S193, the audio title search pointer table 902 (FIG. 9) of the audio manager information 900 is referred to.

In step S194, the AOTT / AVTT flag 961 of the audio title category 931 is read.

In step S195, AOTT / AVT
The value of T flag 961 is determined.

When the value of the AOTT / AVTT flag 961 is A
If the value indicates the OTT, the process proceeds to step S196
Proceed to. The value of the AOTT / AVTT flag 961 is AVT
If the value indicates T, the process proceeds to step S198.

In step S 196, ATS number 934 in audio title search pointer table 902
And the ATS title number 935 are obtained.

In the step S197, a subroutine "Reproduction of title in reproduction mode mainly composed of voice" (FIG. 14)
B) is called. The details of the reproduction process in this subroutine are as already described with reference to FIG. 14B.

In step S 198, the “title playback in video-based playback mode” subroutine (FIG. 13)
B) is called. The details of the reproduction process in this subroutine are as already described with reference to FIG. 13B.

As described above, in the reproduction by the audio player with the video function, the reproduction of the title in the audio-based reproduction mode and the reproduction of the title in the video-based reproduction mode are automatically performed according to the value of the AOTT / AVTT flag 961. Can be switched.

At step S199, it is determined whether or not the title is the last title to be reproduced. Step S1
When the determination at 99 is “Yes”, the reproduction process ends. If the determination in step S199 is “No”, the process returns to step S193.

Next, a specific example of reproduction by an audio player with a video function will be described with reference to FIG.

According to the audio title search pointer table (ATT_SRPT) which is the navigation information of the audio manager (AMG), ATT # 1,
ATT # 2, ATT # 3, ATT # 4, ATT # 5 are reproduced in this order. ATT # 1, ATT # 3, ATT #
4, ATT # 5 is reproduced in the same way as when it is reproduced according to the audio-only title search pointer table (AOTT_SRPT). ATT # 2 is described to reproduce title # 2 of the video manager (VMG). As a result, according to the audio player with the video function, the second half of “Song A”, “Song B ′”
(High quality), "Song C '" (high quality) and the first half of "Song D" are played back in the same manner as an audio-only audio player with only audio, but the start menu (VOB # 1) ') And "Singer Interview"
Are reproduced with video.

The difference between the audio title search pointer table (ATT_SRPT) and the audio only title search pointer table (AOTT_SRPT) is that only the ATT_SRPT can indicate a title in the video zone area. FIG.
In the example shown in, ATT # 2 indicates the title of the video zone area. From such a difference, the concept of a title group has been introduced. Within a title group, titles must be played continuously.

In the example shown in FIG. 18, AOTT_SR
The PT includes AOTT_GR # as a title group.
1 and AOTT_GR # 2. AOTT_GR
ATT # 1 belongs to # 1. AOTT_GR # 2
Belong to ATT # 3, ATT # 4, and ATT # 5. In ATT_SRPT, as a title group,
ATT_GR # 1, ATT_GR # 2, and ATT_GR #
3 is included. ATT_GR # 1 belongs to ATT # 1. ATT_GR # 2 belongs to ATT # 2. ATT_GR # 3 includes ATT # 3, ATT # 4, A
TT # 5 belongs. With such a configuration,
The order of reproduction and the title number of the audio player with the video function and the audio-only audio player can be matched as much as possible. This helps to prevent the user from confusing the order of reproduction and the title.

FIG. 20A shows a specific example of the title search pointer table information.

Audio title search pointer table information (ATT_SRPTI) and audio-only title search pointer table information (AOTT_S
RPTI) describes management information about five titles from ATT # 1 to ATT # 5.

ATT # 2 in ATT_SRPTI indicates the title of the video manager (VMG) (TT # 2 of VTS # 1). Therefore, during playback by the audio player with a video function, the TT #
2 is played.

On the other hand, AT in AOTT_SRPTI
The column of management information corresponding to T # 2 is blank. Therefore,
VT during playback by audio-only audio player
TT # 2 of S # 1 is not reproduced.

FIG. 20B shows an AOB point type AT.
A specific example of the ATS program chain information table (ATS_PGCIT) of S (ATS # 2) is shown. In this example, the ATS program chain information table (ATS_
PGCIT) includes two ATS program chain information (ATS_PGCI # 1, ATS_PGCI # 2). ATS program chain information (ATS
_PGCI # 1) includes one program and one cell, and designates cell # 1 of AOB # 1. ATS
The program chain information (ATS_PGCI # 2) is
It includes one program and one cell, and designates cell # 1 of AOB # 2.

FIG. 20C shows a VOB point type AT.
A specific example of an ATS program chain information table (ATS_PGCIT) of S (ATS # 1) is shown. In this example, the ATS program chain information table (ATS_
PGCIT) includes two ATS program chain information (ATS_PGCI # 1, ATS_PGCI # 2). ATS program chain information (ATS
_PGCI # 1) includes one program and one cell, and specifies cell # 2 of VOB # 2 of VTS # 1. ATS program chain information (ATS_PGC
I # 2) includes one program and one cell,
Cell # 1 of VOB # 6 of VTS # 1 is specified.

(Embodiment 3) Hereinafter, an optical disc, which can switch audio information to be reproduced according to the audio reproducing capability of the reproducing apparatus, a reproducing apparatus and a reproducing method thereof will be described.

The configuration of the reproducing apparatus of the present embodiment is similar to that of FIG.
Is the same as the configuration of the DVD player 1 shown in FIG. However, in the playback device of the present embodiment, whether the playback mode is the video-based playback mode or the audio-based playback mode is not determined before the playback process is performed. The playback device of the present embodiment is positioned as an audio player dedicated to audio.

The data structure stored on the optical disk is the same as the data structure stored on the optical disk of the first embodiment.

FIG. 21A shows an example of data stored on an optical disc.

AOB # 1 is obtained by expressing "Song A" in accordance with audio attributes such as LPCM, a sampling frequency of 48 kHz, a quantization bit number of 16 bits, and two channels.

AOB # 2 is obtained by expressing "Song B" in accordance with audio attributes such as LPCM, a sampling frequency of 96 kHz, a quantization bit number of 24 bits, and a channel number of 2. AOB # 3 expresses the same contents as AOB # 2 with different audio attributes from AOB # 2. That is, AOB # 3 converts “Song B” to LPC
M, sampling frequency 48 kHz, quantization bit number 1
It is obtained by expressing according to the audio attribute of 6 bits and 2 channels.

AOB # 4 is obtained by expressing "Song C" in accordance with the audio attributes of LPCM, sampling frequency of 96 kHz, quantization bit number of 24 bits, and channel number of 6. AOB # 5 expresses the same contents as AOB # 4 with audio attributes different from those of AOB # 4. That is, AOB # 5 converts “Song C” to LPC
M, sampling frequency 96 kHz, quantization bit number 2
It is obtained by expressing according to the audio attribute of 4 bits and 2 channels.

AOB # 6 is obtained by expressing "Song D" in accordance with audio attributes such as LPCM, a sampling frequency of 96 kHz, a quantization bit number of 24 bits, and a channel number of 2. AOB # 7 expresses the same contents as AOB # 6 with audio attributes different from AOB # 6. That is, AOB # 7 converts “Song D” to LPC
M, sampling frequency 48 kHz, quantization bit number 1
It is obtained by expressing according to the audio attribute of 6 bits and 6 channels.

VOB # 1 represents "Song E". VOB #
1 indicates two audio streams (Stream #
1, Stream # 2). The audio stream (Stream # 1) is expressed according to the audio attributes of DTS and 6 channels. The audio stream (Stream # 2) is expressed according to audio attributes such as LPCM, a sampling frequency of 96 kHz, a quantization bit number of 24 bits, and a channel number of 2.

AOB # 8 is obtained by expressing "Song F" in accordance with audio attributes such as LPCM, a sampling frequency of 48 kHz, a quantization bit number of 16 bits, and a channel number of 2.

[0272] Such a data structure enables the reproducing apparatus to reproduce as high quality and high-performance sound as possible according to its sound reproducing ability. For example, LPC
M, a sampling frequency of 96 kHz and a number of channels of 6 and a playback apparatus loaded with an optical disc having the data structure of FIG.
A different sound is reproduced when the optical disc having the data structure shown in FIG. 21A is loaded into a reproducing apparatus having a sampling frequency of 48 kHz and an audio reproducing capability of DTS.

FIG. 21B shows a reproduction order when the data of FIG. 21B is reproduced using a reproduction apparatus having LPCM, a sampling frequency of 96 kHz, and a number of channels of 6 and having a sound reproduction capability. In this case, as shown in FIG. 21B, AOB # 1, AOB # 2, and AOB # 4 are reproduced in this order. Thereafter, one of AOB # 6 and AOB # 7 is reproduced. Which of AOB # 6 and AOB # 7 is reproduced is determined in advance depending on whether importance is attached to quality or multi-channel. Such a determination is made according to an input from a user or according to an attribute of the playback device itself. Then, Str of VOB # 1
Eam # 2 is reproduced, and AOB # 8 is reproduced. As described above, high-quality and high-performance reproduction is performed as much as possible in consideration of the sound reproduction capability of the reproduction device.

FIG. 21C shows a reproduction order in the case of reproducing the data of FIG. 21B using a reproduction apparatus having LPCM, a sampling frequency of 48 KHz, and a DTS having a sound reproduction capability. In this case, as shown in FIG.
B # 1 and AOB # 3 are reproduced in this order. AOB # 4
And AOB # 5 both have a sampling frequency of 96k
Hz. Therefore, the sampling frequency is set to 48 kHz.
And AOB # 5 is reproduced. Then, AOB # 7, Stream # 1 of VOB # 1, AO
B # 8 is reproduced. As described above, high-quality and high-performance reproduction is performed as much as possible in consideration of the sound reproduction capability of the reproduction device.

To perform such selective reproduction, P
A data structure called a GC block is employed.

FIG. 22 shows the data structure of a PGC block. In the example shown in FIG. 22, PGC # of ATS # 1
1 and PGC # 2, ATS # 2 PGC # 2 and PGC #
3, PGC # 4 of ATS # 2 and PGC # 5, ATS # 2
PGC # 6 and PGC # 7 constitute a PGC block, respectively. Also, an audio title search pointer table (AOTT_SRP) indicating the order of reproduction
T) describes ATT # 1 to ATT # 6. Two PGs in a PGC block from the same title
C is indicated together.

FIGS. 23A to 23E show specific examples of the structure of the title search pointer and the PGC.

FIG. 23A shows a title search pointer (A
A specific example of (TT_SRPT) is shown. AT from ATT # 1
An ATS number, a title number in ATS, and a program number in ATT are described for each of up to T # 6. From these descriptions, the PGC indicated by the ATT can be known. Thereby, the object to be reproduced is specified.

FIG. 23B shows an AOB point type AT.
A specific example of S (ATS # 2) will be shown. PGC # 1 to PG
For each of C # 8, title number in ATS, block mode, block type, audio coding mode,
The number of channels is described. The title number in the ATS is specified by a title search pointer. The block mode indicates which part of the PGC block. If the block mode is not a PGC block, '0'
'1' is stored for the first PGC of the block, and '3' is stored for the last PGC of the block. The block type indicates the difference between the PGCs constituting the PGC block. The block type is '0' if not a PGC block, '1' if the audio coding mode is different, '2' if the number of channels is different, and if both the audio coding mode and the number of channels are different Is stored as '3'. By referring to the block type, the playback device can easily know the stream suitable for its playback capability. In this example, the program information is omitted.

In the example shown in FIG. 23B, PGC # 2 and PGC # 3 are blocks having different audio coding modes. That is, the sampling frequency of PGC # 2 is 96 kHz, whereas the sampling frequency of PGC # 3 is 48 kHz. PGC # 4 and PGC #
5 is a block having a different number of channels. That is, in PGC # 4, the number of channels is 6ch, whereas in PGC # 5, the number of channels is 2ch. PG
C # 6 and PGC # 7 are blocks having different audio coding modes and different numbers of channels. That is,
In PGC # 6, the sampling frequency is 96 kHz and the number of channels is 2ch.
In this example, the sampling frequency is 48 kHz and the number of channels is 6 ch.

FIG. 23C shows a VOB point type AT.
A specific example of S (ATS # 1) will be shown. In this example, PGC
# 1 and PGC # 2 differ in the audio coding mode and channel. That is, in PGC # 1, the voice coding mode is DTS and the number of channels is 6ch, whereas in PGC # 2, the voice coding mode is L
PCM and the number of channels is 2ch.

FIG. 23D shows audio attributes of the ATS management table of ATS # 2, and FIG. 23E shows ATS # 1.
2 shows audio attributes of the ATS management table of FIG.

FIG. 24A and FIG. 24B show a procedure of a reproducing process for switching audio information to be reproduced according to the audio reproducing capability of the reproducing apparatus.

The procedure up to obtaining the ATS number and the title number in the ATS is the same as the procedure of the reproduction process in the audio-based reproduction mode shown in FIG. 14A. Therefore, the description is omitted here. In step S165 of FIG. 14A, instead of calling the "title playback in the audio-based playback mode" subroutine shown in FIG. 14B, the "title playback in the audio-based playback mode" subroutine shown in FIG. 24A is called. .

At step S241, the designated ATS
Audio title set 800 corresponding to number 954
The audio title set information 801 (FIG. 8A) is read from the. Further, various attribute information is read (steps S242 and S243).

At step S244, the ATS_PGC category 851 of the ATS program chain information search pointer 832 is searched to find the designated ATS.
ATS_PGC category 851 having an ATS title number 872 that matches the internal title number 955 is found.

ATS_PGC Category 851 Discovered
If the block type 874 of is not 0 (step S245), the ATS program chain information 833 is
It has a PGC block structure. One ATS program chain information 83 to be reproduced out of two ATS program chain information 833 included in the PGC block
3 is selected (step S246). Such a selection is executed by a “selection of PGC in PGC block” subroutine (FIG. 24B).

After that, the selected ATS program chain information 833 is read out and held inside the playback device (step S247). ATS to be reproduced according to the entry order in the ATS program chain information 833
The program information 862 is obtained (Step S24)
8).

A program is reproduced according to ATS program information 862. In the reproduction of the program, the ATS cell reproduction information 863 is sequentially obtained (step S24).
9), the address of the object (AOB or VOB) specified by the cell is calculated (step S25)
0), the object is reproduced based on the address (step S251). Steps S249 to S251
Is repeated until the last cell to be played. In this way, when the reproduction of the last program ends, the reproduction of the title ends.

FIG. 24B is a diagram showing “PGC in PGC block”.
Of the "selection" subroutine.

If there is no block reproduction specification or the block reproduction specification is the first PGC (step S261), it is determined whether or not the first PGC can be reproduced (step S262).

If the block type is 1 (step S264), the audio coding mode is read (step S265), and it is determined whether audio can be reproduced (step S266). If the audio can be reproduced, the selection of the PGC is completed through steps S267 and S268. If the audio cannot be reproduced, the next PG
C is selected (step S263).

If the block type is 2 (step S269), the number of channels is read (step S270), and it is determined whether or not audio can be reproduced (step S271). If the audio can be reproduced, the selection of the PGC is completed through steps S267 and S268. If the sound cannot be reproduced, the next PGC is selected (step S263).

If the block type is 3 (step S272), the audio coding mode and the number of channels are read (step S273), and it is determined whether audio can be reproduced (step S274). If the voice can be reproduced, the selection of the PGC is completed through steps S275 and S276. If the audio cannot be reproduced, the next PGC is selected.

If the block type is not 1, 2, or 3, error processing is performed (step S279). The current PGC is not playable, and
If the current PGC is already the last PGC, error processing is performed assuming that there is no reproducible PGC (step S278).

According to a user operation or a command, P
It is possible to select which of a plurality of PGCs included in the GC block should reproduce. Of course, in order for a PGC to be played back, the playback device needs to have the ability to play back the PGC. This feature, for example,
This is effective when the playback device itself does not know the playback capability, such as an external decoder or D / A converter.

Further, a plurality of Ps included in the PGC block
If the playback device has the ability to play any of the GCs, a method of playing back the first PGC (PGC # 1) and a flag indicating which of the plurality of PGCs is given priority in playback ( Priority playback control information).

(Embodiment 4) In the case where a single disc includes video-based content and audio-based content, or when the same disc is played by players having different playback methods, the title creator Have a desire to assume a reproduction environment. The reproduction environment includes, for example, a user's viewing mode in which the user always wants to reproduce the video or preferentially reproduces the sound over the video. The players having different reproduction methods include a video player that mainly reproduces video, an audio-only audio player that mainly reproduces audio, and an audio player with a video function that mainly reproduces audio but also reproduces video.

In reproducing the title, if the reproduction situation can be defined in accordance with the type of the player or the surrounding conditions in order to correctly convey the intention of the creator to the viewer, the title creator is very unlikely. Is preferable. This encourages the creation of higher quality titles. In the present embodiment, a data structure enabling such title production and an operation of the player will be described. Note that the basic data structure, player configuration, and player operation are the same as those of the first embodiment.

[0300] 1. When playback is not performed with an audio-only audio player (see FIG. 25)

If it is desired that the video is always reproduced, it is sufficient to make it impossible for the audio-only audio player to reproduce the video. In order to realize this, for example, as shown in FIG. 25, a disk structure in which ATS does not exist but ATS indicating only the title of VTS exists in ATT_SRPT of AMG may be adopted. According to this disc structure, an audio player with only audio cannot reproduce anything, whereas an audio player with a video function can reproduce audio with video in the same manner as a video player except for navigation commands and the like. The sound at this time is a range defined for the video player and a range that is mandatory for the audio player.

[0302] 2. When the same playback as the video player is performed in the audio player with the video function (video-first playback) (see FIG. 26)

[0303] Although the audio-only audio player allows only the audio to be reproduced, the audio player with the video function may reproduce the video preferentially. To realize this, for example, as shown in FIG.
Only the VOB point type ATS exists,
AMG ATT_SRPT and AOTT_SRPT include
There is an ATT that indicates the VOB in the video zone area by the PGC of the VOB point type ATS, and ATT_
The SRPT may employ a disc structure in which an ATS indicating the title of a VTS first exists. According to this disk structure, even audio-only audio players can
According to TT_SRPT, only the audio of the VOB in the video zone area can be reproduced. The audio player with video function has a video
The sound of B can be reproduced. The sound at this time is a range defined for the video player and a range that is mandatory for the audio player.

[0304] 3. When the audio player with the video function reproduces audio of the same quality as the video player or audio of higher quality than the video player (FIG. 27)
And FIG. 28)

An audio-only audio player can reproduce higher quality audio than a video player.
The audio player with the video function may be capable of selectively reproducing sound of the same quality as that of the video player or sound of higher sound quality than the video player. In order to realize this, as shown in FIG. 27 and FIG.
G ATT_SRPT and AOTT_SRPT have ATS
ATT indicating AOB by PGC of
T_SRPT may employ a disc structure in which an ATS indicating the title of a VTS exists. According to this disk structure, the audio-only audio player can reproduce higher-quality audio than audio specified for the video player. In addition, the audio player with the video function can reproduce audio with higher quality than the video player, and can reproduce audio with video of the same quality as the video player.

The difference between the reproduction method of FIG. 27 and the reproduction method of FIG. 28 is that the audio player with the video function reproduces the audio with video preferentially or reproduces the high-quality audio preferentially. . In the example of FIG. 27, audio with video corresponds to a smaller number in the title group than high-quality audio. In the example of FIG. 28, high-quality audio corresponds to a smaller number in the title group than audio with video. In a remote control operation or the like, usually, the title groups are played back in the order of the title group number, so that the title group with the smaller number is played first. Of course, using the menu, it is also possible to reproduce either one of the audio with video and the audio with high sound quality.

[0307] 4. When playing high-quality audio with an audio player with a video function (see Fig. 29)

[0308] Both the audio-only audio player and the audio player with the video function may reproduce high-quality audio. In order to realize this, as shown in FIG. 29, there is an ATS of AOB point type, ATT_SRPT and AOTT_SRPT of AMG include ATT indicating AOB by PGC of ATS, and VOB in the video zone area. May adopt a disc structure in which no indication is given from the audio zone area. According to this disc structure, both the audio-only audio player and the audio player with a video function can reproduce only high-quality audio. Video players can play audio with video.

[0309] 5. When the playback is prohibited in the video player (see Fig. 30)

[0310] Reproduction may be prohibited in a video player. In order to realize this, as shown in FIG. 30, a disc structure having no video zone area may be adopted. According to this disc structure, the video player cannot play the disc because there is no video zone area. Both audio players with video and audio-only audio players can play high quality audio as well.

As described above, by properly selecting the data structure, the title creator can specify a reproduction method using a video player, an audio player with a video function, or an audio-only audio player. Also, depending on whether a display is connected to the player and whether playback of video is permitted, it is determined whether to behave as a video player, an audio player with video function, or an audio-only audio player By doing so, the player reproduction method can be changed at the start of the disk reproduction or even during the disk reproduction.

(Embodiment 5) In the case of a video disc,
Since there is a menu and it is necessary to set various players with commands, First is used as an area to describe commands automatically executed when a disc is inserted.
_Play_PGC was defined. However, in the audio player, the menu is not necessarily required, and the attribute of the video is not required. Therefore, it is not necessary to perform the setting by the command before the reproduction is started. However, if the reproduction is not started unless the "Play" key is pressed after the insertion of the disc as in the case of a CD, an extra action is required of the user, which is inconvenient. The data structure of the disc for automatic execution and the method of reproducing the player that match the characteristics of the audio player as described above will be described below.

Since the basic data structure and the structure of the player are the same as those in the first embodiment, different parts will be described.

FIG. 31 shows the audio manager information (A
3 shows a data structure of an MGI). The audio manager management table (A, not described in detail in the first embodiment)
MGI_MAT) has an automatic execution flag (AP_IN)
F). When the value of the automatic execution flag is 1, it means that the reproduction is started from ATT # 1 of title group # 1.

When a disc is inserted, the audio player reads the audio manager and sets various attributes. After completing the initial settings, the audio player
Read the autorun flag. When the value of the automatic execution flag is 1, reproduction is started from ATT # 1 of title group # 1. That is, audio reproduction is started immediately when a disc is inserted without any user operation.

[0316] As described above, it is possible to realize reproduction as intended by the creator, and after inserting the disc, "Pl
The operation of pressing the "ay" key can be omitted.

[0317]

According to the present invention, the first audio data obtained by expressing the audio information according to the first audio attribute, and the audio information according to the second audio attribute different from the first audio attribute. An optical disc is provided which stores second audio data obtained by expressing the following, and management information for enabling one of the first audio data and the second audio data to be selectively reproduced. You. One of the first audio data and the second audio data is reproduced based on the audio reproduction capability of the reproduction device and the management information. This allows
It is possible to reproduce sound that matches the sound reproduction capability of the reproduction device.

[Brief description of the drawings]

FIG. 1A is an external view of an optical disc according to an embodiment of the present invention.

FIG. 1B is a cross-sectional view of the optical disc according to the embodiment of the present invention.

FIG. 1C is an enlarged sectional view of the optical disc according to the embodiment of the present invention.

FIG. 1D is a diagram showing pits formed on the optical disc according to the embodiment of the present invention.

FIG. 2A is a diagram showing a track structure of the optical disc according to the embodiment of the present invention.

FIG. 2B is a diagram showing a sector structure of the optical disc according to the embodiment of the present invention.

FIG. 3 is a diagram showing a data structure of the optical disc according to the embodiment of the present invention.

FIG. 4 is a diagram showing a data structure of a video title set according to the embodiment of the present invention.

FIG. 5 is a diagram showing a display mode of a video menu according to the embodiment of the present invention.

FIG. 6 is a diagram showing a data structure of a video title set according to the embodiment of the present invention.

FIG. 7 is a diagram showing a data structure of a video manager according to the embodiment of the present invention.

FIG. 8A is a diagram showing a data structure of an AOB point type audio title set according to the embodiment of the present invention.

FIG. 8B is a diagram showing a data structure of a VOB point type audio title set according to the embodiment of the present invention.

FIG. 8C is a diagram showing a data structure of ATS address information of the ATS management table of the audio title set according to the embodiment of the present invention.

FIG. 9 is a diagram showing a data structure of an audio manager according to the embodiment of the present invention.

FIG. 10 is an external view showing the external appearance of a DVD player according to an embodiment of the present invention and a television device connected to the DVD player.

FIG. 11 is an external view of a remote control device according to the embodiment of the present invention.

FIG. 12 is a block diagram illustrating a configuration of a DVD player that is a disc reproducing apparatus according to an embodiment of the present invention.

FIG. 13A is a flowchart showing a procedure of a reproduction process in a video-based reproduction mode according to the embodiment of the present invention.

FIG. 13B is a flowchart showing a procedure of title playback processing in a video-based playback mode according to an embodiment of the present invention.

FIG. 14A is a flowchart showing a procedure of a playback process in a playback mode mainly for audio according to the embodiment of the present invention.

FIG. 14B is a flowchart showing a procedure of a title playback process in a playback mode mainly composed of audio according to the embodiment of the present invention.

FIG. 15 is a diagram showing a display form of a head menu stored in the video manager according to the embodiment of the present invention.

FIG. 16A is a diagram illustrating an example of a configuration of an application according to the embodiment of this invention.

FIG. 16B is a diagram for explaining the operation of the disc reproducing apparatus according to the embodiment of the present invention.

FIG. 17 is a diagram showing storage positions of respective data on the optical disc according to the embodiment of the present invention.

FIG. 18 is a diagram schematically showing a relationship between each piece of reproduction information and an object according to the embodiment of the present invention.

FIG. 19 is a flowchart showing a procedure of a reproduction process by the audio player with the video function according to the embodiment of the present invention.

FIG. 20A is a diagram showing a specific example of a title search pointer of audio manager information and video manager information of the optical disc according to the embodiment of the present invention.

FIG. 20B is an AOB of the optical disc according to the embodiment of the present invention;
It is a figure showing the example of the PGC composition in point type ATS.

FIG. 20C is a VOB of the optical disc according to the embodiment of the present invention;
It is a figure showing the example of the PGC composition in point type ATS.

FIG. 21A is a diagram showing an example of data stored on the optical disc according to the embodiment of the present invention.

FIG. 21B is a diagram showing a reproduction order when the reproduction is performed by the reproduction device according to the embodiment of the present invention.

FIG. 21C is a diagram illustrating a playback order when the playback is performed by the playback device according to the embodiment of the present invention.

FIG. 22 is a diagram schematically illustrating a relationship between each piece of reproduction information and an object when a PGC block exists according to the embodiment of this invention.

FIG. 23A is a diagram showing a specific example of a title search pointer table according to the embodiment of this invention.

FIG. 23B is a diagram showing a specific example of a PGC configuration in an AOB point type ATS according to an embodiment of the present invention.

FIG. 23C is a diagram illustrating a specific example of a PGC configuration in a VOB point type ATS according to an embodiment of the present invention.

FIG. 23D is a diagram illustrating a specific example of an audio attribute of the ATS management table according to the embodiment of this invention.

FIG. 23E is a diagram illustrating a specific example of an audio attribute of the ATS management table according to the embodiment of this invention.

FIG. 24A is a flowchart showing a procedure of title playback processing in a playback mode mainly composed of audio when a PGC block exists according to an embodiment of the present invention.

FIG. 24B is a flowchart illustrating a procedure of a PGC selection process in a PGC block according to the embodiment of this invention.

FIG. 25 is a diagram schematically showing a relationship between each piece of reproduction information and an object according to the embodiment of the present invention.

FIG. 26 is a diagram schematically showing a relationship between each piece of reproduction information and an object according to the embodiment of the present invention.

FIG. 27 is a diagram schematically showing a relationship between each piece of reproduction information and an object according to the embodiment of the present invention.

FIG. 28 is a diagram schematically showing a relationship between each piece of reproduction information and an object according to the embodiment of the present invention.

FIG. 29 is a diagram schematically showing a relationship between each piece of reproduction information and an object according to the embodiment of the present invention.

FIG. 30 is a diagram schematically showing a relationship between each piece of reproduction information and an object according to the embodiment of the present invention.

FIG. 31 is a diagram showing a data structure of an audio manager for performing automatic reproduction when a disc is inserted according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 DVD player 2 television device 81 motor 82 pickup 83 mechanism control unit 84 signal processing unit 85 AV decoder unit 86 system decoder unit 87 video decoder 88 sub-video decoder 89 audio decoder for AV decoder 90 video synthesis unit 91 remote control device 92 remote control reception Unit 93 System control unit 94 Audio decoder unit 100 DVD optical disk 108 First transparent substrate 109 Information layer 110 Adhesive layer 111 Second transparent substrate 112 Printing layer 113 Light beam 114 Light spot

Claims (9)

[Claims] 1. An optical disc having a data area and a management area, wherein the data area includes first audio data obtained by expressing audio information in accordance with a first audio attribute; A second attribute obtained by expressing the audio information according to a second audio attribute different from the audio attribute.
In the management area, management information for selectively reproducing one of the first audio data and the second audio data is stored. ,optical disk. 2. The optical disc according to claim 1, wherein the management information includes information indicating a difference between the first audio attribute and the second audio attribute. 3. The management information includes information as to whether a voice coding mode in the first voice attribute is different from a voice coding mode in the second voice attribute, the number of channels in the first voice attribute, and the number of channels. The optical disc according to claim 1, further comprising information indicating whether or not the number of channels in the second audio attribute is different. 4. A reproducing apparatus for reproducing an optical disk, wherein the optical disk has a data area and a management area, and the data area expresses audio information according to a first audio attribute. The first audio data obtained and a second audio data obtained by expressing the audio information according to a second audio attribute different from the first audio attribute.
In the management area, management information for enabling one of the first audio data and the second audio data to be selectively reproduced is stored. A reading unit that reads the management information from the management area; and a first audio data and a second audio data based on the audio playback capability of the playback device and the management information. A reproducing unit that reproduces one of the two. 5. The reproducing apparatus according to claim 4, wherein the management information includes information indicating a difference between the first audio attribute and the second audio attribute. 6. The management information includes information as to whether a voice coding mode in the first voice attribute is different from a voice coding mode in the second voice attribute, the number of channels in the first voice attribute, and the number of channels in the first voice attribute. The reproduction device according to claim 4, further comprising information indicating whether or not the number of channels in the second audio attribute is different. 7. A reproducing method for reproducing an optical disk, wherein the optical disk has a data area and a management area, and the data area expresses audio information according to a first audio attribute. The first audio data obtained and a second audio data obtained by expressing the audio information according to a second audio attribute different from the first audio attribute.
In the management area, management information for enabling one of the first audio data and the second audio data to be selectively reproduced is stored. The reproduction method, further comprising: reproducing one of the first audio data and the second audio data based on the audio reproduction capability of the reproduction device and the management information. 8. The reproducing method according to claim 7, wherein the management information includes information indicating a difference between the first audio attribute and the second audio attribute. 9. The management information includes information as to whether a voice coding mode in the first voice attribute is different from a voice coding mode in the second voice attribute, the number of channels in the first voice attribute, and the number of channels in the first voice attribute. The reproduction method according to claim 7, further comprising information indicating whether or not the number of channels in the second audio attribute is different.