JP2000293951A - Information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately reproduce a plurality of pieces of audio information with different conditions by including identification information for making the plurality of pieces of audio substance information with different attributes correspond to the same work in a reproduction control information recording area. SOLUTION: A plurality of pieces of audio information whose types are different are recorded on a disk, and also, since pieces of audio information in which a record object is common are handled as the same work and as the same music in principle, a PGC 300 as management information is introduced, and a plurality of pieces of audio information of different types are made to be related to one title 261. the reproduction control information of audio substance information managed by the PGC 300 is an ATS PGCI, and information for searching for an ATS-PGCI corresponding to each title 261 is described in an ATS-PGCI-SRP. For instance, whether the PGC 300 is entry is described in each ATS-PGCI.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of an information recording medium such as a DVD disk on which sound information such as music having different recording methods and encoding methods is recorded.

[0002]

2. Description of the Related Art Video DVDs (discs conforming to the DVD-Video standard) are known as recording media for recording video information such as movies. Video DVDs are widely used as recording media for video information such as movies because of their large capacity.

[0003] Also, an audio DVD (disc conforming to the DVD-Audio standard) has been developed with a view to recording only audio information such as music, not video information such as a movie. This audio DVD
Since the large capacity of a DVD, audio information corresponding to a plurality of CDs (compact discs) can be recorded on one audio DVD. Further, in addition to video information such as a movie, it is also possible to record audio information corresponding to a music CD of a soundtrack version of the movie.

[0004]

SUMMARY OF THE INVENTION Audio DVDs
Its main purpose is to record audio information such as music, and to make it possible to reproduce multi-channels like never before. Also, not only multi-channel but also 2c
The aim is to enable unprecedented high-quality playback even in stereo playback.

[0005] When only such multi-channel audio information is recorded on such a DVD audio disc, a person having a reproduction device dedicated to 2ch can only hear a part of the sound or cannot reproduce at all. Such a problem arises.

[0006] Therefore, in order for a person who has only a playback device dedicated to 2ch to enjoy the disc, it is necessary to record audio information for 2ch playback on the disc together with multi-channel audio information.

However, in this case, the two types of audio information are of the same title and the same tune. Therefore, these two types of audio information are
When recorded on a disc, there are two types of songs having the same title and the same name, and there is a problem that the user is confused. This problem is caused not only when the playback mode such as the channel is different, but also when the recording mode such as binaural recording is different, or when the encoding method such as AC-3 is different, and further, when the playback mode, the recording mode, or A similar problem arises when the combination of the encoding methods is different.

[0008] The present invention has been made in view of the above points, and is intended for a user even when a plurality of pieces of audio information having different recording modes, reproduction modes, encoding methods, and the like are recorded on a disc. It is an object of the present invention to provide an information recording medium capable of appropriately reproducing respective audio information without causing confusion.

[0009]

In order to solve the above-mentioned problems, an information recording medium according to the present invention has an audio information recording area (ATS) in which a plurality of audio entity information (AOBs) having the same work and different attributes are recorded. ) And a reproduction control information recording area (ATSI) recording reproduction control information (ATS_PGCI) defined for each of the audio entity information, wherein the reproduction control information recording area has an attribute. It is characterized by including identification information (ATS_PGCI_SPR) for associating a plurality of different pieces of audio entity information (AOB) with the same work.

According to the present invention, audio information having the same content with different attributes can be managed under the content. Therefore, even if the audio information has the same content but different attributes, the user can manage the audio information for each audio information. It does not need to be specified and does not confuse the user.

[0011]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

(1) DVD Video Format First, the recording format (physical recording format) of video information and audio information (including music information; the same applies hereinafter) on a video DVD will be described with reference to FIG.

(1.1) Physical Format As shown in FIG. 1, the video DVD 1 has a lead-in area LI on the innermost periphery and a lead-out area LO on the outermost periphery, and the video DVD 1 is located between the two. A plurality of VTSs (Video Title Sets) 4 each having an ID (identification) number.
(VTS # 1 to VTS # n) and recorded. Here, the VTS is a related title (having the same number of audio information and sub-picture information, the same attributes such as specifications and supported languages, etc.) (such as a movie, etc.) This is a set (collection) of all three works). Immediately outside the lead-in area LI, a UDF (Universal DiskForma) having information for managing a format of a file recorded in the disc is provided.
t) 2 is recorded, followed by VMG (Video Manage
r) 3 is recorded. The information recorded as the VMG3 includes, for example, a menu indicating selection items for the user, information for preventing illegal copying, or an access table for accessing each title, and the like, and video information recorded on the video DVD1. And management information relating to the entire audio information.

One VTS 4 is a VTSI (Video Title)
Set Information) 11 is divided into a plurality of VOBs (Video OBjects) 10 each having an ID number and recorded. Here, a portion constituted by a plurality of VOBs 10 is called a VOB set (VOBS).

VTSI 11 recorded at the head of VTS 4
In PGCI (Program Chain Informatio), which is various information regarding a program chain which is a logical division in which a plurality of cells (cells will be described later) are combined.
Information such as n) is recorded. Also, in each VOB 10,
A substantial part of the video information and the audio information is recorded.

One VOB 10 is composed of a plurality of cells 20 each having an ID number. One cell 20
Are a plurality of VOB units (V
OBU) 30. Here, VOBU30
Is one of video information, audio information, and sub-video information (refers to sub-video information such as subtitles in a movie) or one unit composed of only a navi pack described later.

One VOBU 30 includes a navigation pack 41 storing control information for controlling video information and the like included in the VOBU 30, a video pack 42 containing video data as video information, and an audio pack as audio information. Audio pack 43 containing data and sub-picture pack 4 containing sub-picture data as sub-picture information
4. Here, only video data is recorded as video data, and only audio data is recorded as audio data. In addition, only graphic data such as characters and graphics as sub-pictures is recorded as sub-picture data.

The pack header recorded at the beginning of each pack P has a playback time for reading data contained in each pack P from a track buffer in a playback apparatus to be described later and starting inputting to each buffer. Read start time information called SCR (System Clock Reference) indicating the read start time on the axis, a start code indicating the start of the pack P, and the like are recorded.

The navigation pack 41 stores search information for searching for a video or audio to be reproduced and displayed (specifically, a D in which the video or audio to be reproduced and displayed is recorded).
DSI (Data Search In) which is an address on VD1
formation) data 51 and PCI (Presentation Control) which is information related to reproduction display control when reproducing and displaying a video or audio searched based on the DSI data 51.
Information) data 50.

All video packs 42 included in one VOBU 30 include one or a plurality of GOPs (Group Of Pics).
ture). The GOP is an MPEG2 (Moving Pictu), which is an image compression method employed when recording video information on the DVD 1 in the present embodiment.
re Experts Group 2) This is the smallest image unit that can be reproduced independently and is defined in the standard of the system.

In the above-described recording format having the hierarchical structure shown in FIG. 1, each division is a creator of recording information to be recorded on the DVD 1 (hereinafter simply referred to as a creator).
Is to set and record the classification freely according to the intention. By performing reproduction based on a logical structure described later for each of these sections, various types of reproduction can be performed.

(1.2) Logical Format Next, a logical format (logical structure) combining information recorded by the physical divisions shown in FIG. 1 will be described with reference to FIG. Note that the logical structure shown in FIG.
In this structure, information is not actually recorded on the DVD 1, but reproduction control information (access information or access information or information) for reproducing the data (particularly the cell 20) shown in FIG. 1 in combination with the logical structure shown in FIG. Time information, etc.) are recorded on the DVD 1, especially in the VTSI 11.

For convenience of description, starting from the lower hierarchy of FIG. 2, by selecting and combining a plurality of cells 20 in the physical structure described in FIG. Be composed. The creator can also define one or a plurality of the programs 60 as a minimum unit that can be freely selected and viewed by a viewer, and this unit is defined as PTT (Part o
f Title).

Here, regarding the number of one cell 20,
When the cell 20 is handled in the physical format shown in FIG. 1, it is handled as a cell ID number (in FIG. 1,
Indicated as cell ID #. 2), when handled in the logical format shown in FIG. 2, they are handled as cell numbers in the order of description in PGCI described later.

One PGC (Program Chain) 61 is logically constructed by combining a plurality of programs 60. The PGCI described above is defined in units of the PGC 61,
The reproduction order of the cells 20 for each program 60 at the time of reproducing each program 60 (a unique program number is assigned to each program 60 according to this reproduction order) to the PGCI, and the DVD 1 of each cell 20. It contains the address of the upper recording position, the number of the first cell 20 to be reproduced in one program 60, and the like.

In one PGC 61, in addition to the PGCI, data such as substantial video and audio data is stored in the program 60.
(In other words, as a combination of cells 20).

One or more PGCs 61 logically constitute one title 62. The title 62 is, for example, a unit corresponding to one movie in terms of video information, and is complete information provided to the viewer of the DVD 1 by the producer.

By one or a plurality of titles 62, one V
The TS 63 is logically configured.

The information corresponding to one VTS 63 shown in FIG. 2 corresponds to the information contained in one VTS 4 shown in FIG. That is, the VTS shown in FIG.
All the information logically included in 63 is collectively recorded as one VTS 4.

By specifying the information divided in the physical structure by the producer based on the logical format described above, a video or music to be viewed by the viewer is formed.

(2) DVD Audio Format Next, a recording format (physical recording format) of audio information (including music and audio information; the same applies hereinafter) on an audio DVD will be described with reference to FIG.

(2.1) Physical Format First, a physical format (physical recording format) on an audio DVD will be described with reference to FIG.

First, as shown in FIG. 3, the audio DVD 200 according to the embodiment has a lead-in area LI at the innermost periphery and a lead-out area LO at the outermost periphery. It is a volume space. An audio zone is always recorded in this. In this audio zone, audio information is assigned IDs respectively.
A plurality of ATSs (Audio Title Se
t) Divided into 203 (ATS # 1 to ATS # n) and recorded. At the beginning of the audio zone, SAPPT (Simple Audio Play Pointer Table) 2 as playback control information for simple playback (such as 2-channel playback)
04 is recorded. This SAPPT is recorded on all DVD disks having an audio zone.
Note that the SAPPT 204 may be recorded in the lead-in area LI or the AMG 202 described later.

At the outer periphery of the lead-in area LI,
UDF (Universal Disk Format) having information for managing the format of a file recorded in the disk
t) 201 is recorded, and UAPP201 is followed by SAPP
T204 is recorded, and then AMG (Audio Manager)
202 is recorded. However, UDF201, SAPP
The arrangement of T204 and other files does not always have to be in this order.

The information recorded in the SAPPT 204 is information necessary for reproducing LPCM data on 2 channels. The information recorded as the AMG 202 is recorded on the audio DVD 200, such as a menu for prompting the user to select an item, information for preventing illegal copy, or an access table for accessing each title. This is management information relating to the entirety of the audio information that has been input.

One ATS 203 is an ATSI (Audio Ti
tle Set Information) 211 starting with I
It comprises a plurality of AOBs (Audio Objects) 210 having D numbers.

Here, a portion constituted by a plurality of AOBs 210 is called an AOB set (AOBS). This AOB set is a substantial part of audio information.

ATSI recorded at the beginning of ATS 203
211 includes a plurality of cells (cells will be described later).
As reproduction control information, which is various information related to a program chain which is a logical division in which
Information such as I (Audio Program Chain Information) is recorded. In each AOB 210, a substantial part of audio information is recorded. One AOB 210 includes a plurality of cells 220 each having an ID number.

One cell 220 includes a plurality of packed audio packs 230 or an audio pack and a real-time information pack (Real Time Information Pack).
ck) 231. Audio pack 230
Is a pack of audio information to be recorded on an audio DVD for each predetermined size.
Audio information digitized by a CM or the like is included. The real-time information pack 231 includes text information, BPM (Beat Per Minutes), beat information, and the like.

In the above-described recording format having the hierarchical structure shown in FIG.
The creator (hereinafter, simply referred to as a creator) of the recording information to be recorded in 200 can freely set and record the division according to the intention. By performing reproduction based on a logical structure described later for each of these sections, various types of reproduction can be performed.

(2.2) Logical Format Next, a logical format (logical structure) combining information recorded by the physical divisions shown in FIG. 3 will be described with reference to FIG.

The logical structure shown in FIG. 4 does not actually record information on the audio DVD 200 in the structure. Audio information is merely recorded on the audio DVD in the physical format shown in FIG. 3, and information for reproducing this audio information is written in the logical format shown in FIG.
2. It is recorded in the ATSI 211.

For the sake of convenience, starting from the lower hierarchy of FIG. 4, of the physical structures described in FIG.
An index 259 is configured by selecting one cell or a plurality of cells 220 and combining them. The index can also be used as a song number, and is the smallest unit accessible by the user.

One track 260 is logically constituted by one or a plurality of indexes 259. The track 260 is an information unit corresponding to one piece of music. The user can select an arbitrary track (song) and directly access the track.

Here, the number of one cell 220 is handled as a cell ID number when the cell 220 is handled in the physical format shown in FIG.
Medium and cell ID # are shown. 4), when handling in the logical format shown in FIG. 4, they are handled as cell numbers in the order of description in APGCI described later.

The track 260 (song) is an information unit including a plurality of cells, and is a set of cells having certain common attributes and the like. That is, the attributes of all cells in the track are all the same. Also, all cells included in a track are recorded adjacently in the same object.

One title 261 is logically constructed by combining one or a plurality of tracks 260. However, the title itself is not recognized as a unit of access by the user. Therefore, an arbitrary title cannot be accessed by specifying a title number.

In the audio DVD, the attribute of each track 260 constituting the title 261 can be independently defined in up to eight patterns. That is, the attributes as audio information such as the number of channels, the quantization method, and the sampling frequency may be changed for each track (song).

In the unit of the title 261, the A
The PGCI is defined, and the APGCI includes the attribute of each track, the reproduction order of the cells 220 for each track 260 when reproducing each track 260, and the respective cells 220
Of the recording position on the audio DVD 200, the first cell 2 to be reproduced in one track 260
20, a reproduction method of each track 260 and various commands are included.

One title 261 includes the above APGCI
In addition, substantial audio information is included as a combination of tracks (songs) 260 (in other words, as a combination of cells 220).

One or more titles 261 logically constitute one title group 262. Also, the title group 262 is a maximum unit that can be accessed by the user, and up to nine title groups in one volume can be defined. The title group 262 includes one or a plurality of titles 26 grouped based on a certain relevance.
1 and all titles in the title group are played back continuously. For example, a collection of songs of a certain singer or composer can be collected as one title group.

One or more title groups 262 logically constitute one volume 263. The volume 263 is an information unit corresponding to one album (DVD).

The actual audio information contained in one title shown in FIG. 4 is recorded in one of the ATSs 203 shown in FIG. 3 on the audio DVD.

According to the logical format described above, the creator specifies the information divided in the physical structure, thereby forming music to be heard by the viewer.

(3) Type of DVD Next, the type of disk in a DVD will be described. In the following description, regarding information recorded on a DVD, information including both video and audio, such as a movie, may be referred to as “AV information”. Or video) information. Further, information including only the audio portion of AV information such as a movie and only audio information such as music is referred to as “audio (or audio) information”.

As a DVD player for reproducing these various DVD discs, there are a video DVD player (hereinafter, referred to as a "video player") capable of reproducing AV information in a DVD video format, and an audio in a DVD audio format. An audio DVD player (hereinafter, referred to as an “audio player”) that reproduces information in various reproduction modes, and a simple audio DVD player (hereinafter, a “simple audio player”) that reproduces LPCM audio information in a DVD audio format on two channels. ) And a compatible DVD that can reproduce both DVD video format AV information and DVD audio format audio information.
Player (hereinafter, referred to as "compatible player")
There are four types. Each DVD player will be described later in detail.

As DVDs for recording AV information or audio information, there are four types of discs: a video DVD, a video DVD with audio navigation, an audio-only DVD, and a DVD for both audio and video. FIG. 5 schematically shows the physical formats of four types of DVDs.

These DVDs have the same disk shape and information recording method (modulation method, track pitch, pit size, etc.), but differ only in the content of information.

(3.1) Video DVD The video DVD is shown at the top in FIG.
This disc records video information such as a movie according to the DVD video format and audio information (ie, AV information) to be reproduced at the same time. Therefore, the lead-in area LI and the lead-out area LO
Only the video zone exists in the recording area between the playback control information, the playback control information, the video information, and the audio information.
A VMG that is recorded in the TS and includes management information of the VTS is recorded. As described with reference to FIG. 1, video information is recorded as a video pack, and audio information is recorded as an audio pack.

The video DVD has a video player and a compatible player based on navigation information (information defining control information for reproduction, which will be described in detail later) included in management information recorded on the VMG. Reproduced by. However, since the navigation information in the DVD audio format is not recorded, it cannot be reproduced by the audio player.

(3.2) Video DVD with Audio Navigation The second row shows a type of video disk called a video DVD with audio navigation. This video DVD with audio navigation is capable of reproducing video information such as a movie in a DVD video format (including accompanying audio information) by a video player and also recording navigation information in a DVD audio format, thereby providing audio. This is a disc that allows a player to reproduce only the audio information of the AV information of the VOB in the VTS.
Also, a part of the AV information in which only the audio information can be reproduced by the audio player is called an audio play part.

Video DV with audio navigation
The recording format of D is based on the DVD video format shown in FIG.
It is recorded in the form of. In addition to this, the video DVD with audio navigation is recorded as an ATS in the audio zone ahead of the video zone, in accordance with the DVD audio format, including ATSI including reproduction control information necessary for reproducing only the audio information in the VTS. AMG is recorded as ATS management information. AOB, which is a substantial part of audio information, is not recorded in the ATS. That is, the AMG and the AT
SI has a video DVD with audio navigation
Audio information included in each VTS (specifically,
The navigation information for reproducing the audio play part audio pack (see FIG. 1) in each VOB by the audio player is described.

Also, at the beginning of the audio zone, SAP
PT is recorded. This SAPPT describes navigation information for reproducing LPCM audio information included in the VTS on 2 ch.

This video DVD with audio navigation is reproduced by a video player and a compatible player based on the navigation information recorded in the VMG. In addition, audio information of an audio play part is reproduced in various reproduction modes by the audio player based on the navigation information recorded in the AMG according to the ability of the player. Also, the LPCM information of the audio play part is reproduced on 2ch by the simple audio player based on the navigation information recorded in the SAPPT.

(3.3) Audio Only DVD The third row shows an audio only DVD.
This disc records only audio information except for some still images and text information. Therefore, only the audio zone exists in the recording area between the lead-in area LI and the lead-out area LO, and the ATS
I and AOB are recorded as a plurality of ATSs,
AMG including the management information of S is recorded. Furthermore, SAPP is provided in the lead-in area LI or audio zone.
T is recorded.

Each ATS includes one or a plurality of AOBs which are substantial parts of audio information. In this audio-only DVD, audio information in an audio zone is reproduced in various reproduction modes by an audio player and a compatible player based on navigation information recorded in the AMG according to the capabilities of the player.
Also, the LPCM information in the audio zone is reproduced on 2ch by a simple audio player based on the navigation information recorded in the SAPPT. However, DV
Since the navigation information in the D-video format is not recorded, it cannot be reproduced by the video player.

(3.4) Audio / Video Dual-Purpose DVD The audio / video dual-purpose DVD is shown at the bottom of FIG.
It is called. There is an audio zone and a video zone between the lead-in area LI and the lead-out LO. The video zone has a DVD as well as a video DVD.
A VTS including a VMG, playback control information, and AV information (VOB) as an entity is recorded according to the video format. SAPPT is recorded in the lead-in area LI or the audio zone.

In the audio zone, a plurality of ATSs including SAPPT, AMG, reproduction control information, and audio information as a substance (ATS in the figure) are provided in the audio zone in accordance with the DVD audio format, in the same manner as the audio only DVD.
# 1, # 2) are recorded. In addition, V in the video zone
An ATS (ATS # 3 in the figure) including only reproduction control information for reproducing only the audio information of the VOB in the TS is also recorded. That is, audio / video dual use D
In VD, AV in DVD video format
Information and audio information in the DVD audio format are recorded in separate areas.

In the case of an audio / video dual-purpose DVD,
The AMG not only includes management information of all ATSs in the audio zone, but also includes management information that includes all ATSs and VTSs in the audio zone and the video zone. The SAPPT also includes management information that includes all ATSs and VTSs in the audio zone and the video zone. However, the management information is 2c of both zones.
h is only for LPCM data that can be reproduced.

The difference between the audio-video DVD and the video disk with audio navigation and the audio-only DVD is that the recording area of the disk is divided into an audio zone and a video zone. The point that audio information in the audio format is recorded and the AM recorded in the audio zone
G and SAPPT include management information including all ATSs and VTSs in the disc.

More specifically, in a video disc with audio navigation, the audio information is
Based on the DVD video format, it is multiplexed and recorded with video information in packs in a VOB. An ATS is constituted by APGCI, which is reproduction control information for reproducing audio information recorded in the VOB, as ATSI, and only these ATSs are managed by AMG. The AMG does not record title management information in the video zone. Similarly, the navigation information on the audio play part of the video zone is described in the SAPPT.

On the other hand, an audio / video dual-purpose DV
In D, there are separate areas for recording audio information in the DVD audio format and AV information in the DVD video format. In the audio zone,
The substantial part of the audio information is recorded in each ATS as a plurality of AOBs according to the DVD audio format shown in FIG. Further, APGCI, which is playback control information of audio information in each ATS, is recorded in ATS
ATS in which not only the TS but also the audio information playback control information recorded in the VOB in the VTS in the video zone is recorded in the ATSI as APGCI (the audio entity information is in the video area and the navigation information is AT
Only SI exists as ATS. Two types of A
TS is recorded. That is, all ATSs of the reproduction control information related to the reproduction of the audio information regardless of the zone
Is managed by the AMG. In addition, all ATS, VT
Among the reproduction control information related to the reproduction of the LPCM audio information recorded in S, information on a track that can be reproduced on 2 ch is recorded in SAPPT.

On the other hand, in the video zone, AV information is recorded as a plurality of VTSs, and reproduction control information of the AV information in each VTS is recorded as PGCI in the VTSI.
All these VTSs are managed by VMG. On the other hand, AM
G also manages all reproduction control information related to AV information reproduction in the video zone.

Specifically, audio only DVDs,
In the case of an audio / video DVD, AMG is the general management information, and in the case of a video DVD, the VMG is the main management information. In the case of a video DVD with audio navigation, the AMG manages only the reproduction of only the audio information in the VOB by the audio player, and does not manage the video title.

In the case of an audio-only DVD and an audio / video dual-use DVD, the SAPPT is, for example, a simple or portable audio player.
This is comprehensive management information for reproducing LPCM audio information on 2 ch. SAPPT for video DVD
Therefore, even if recorded by LPCM, the simple player does not reproduce only the audio information.
S for video DVD with audio navigation
The APPT manages only reproduction of LPCM audio information (audio-only title) of an audio play part in a VOB by a simple audio player, and does not manage a video title.

By adopting such a structure, optimum reproduction can be performed according to the capability of the reproducing apparatus, and consistent compatibility between each disk and each reproducing apparatus is realized.

(4) Title Playback Control Next, the title playback control will be described in more detail. Here, the title is a series of works (presentations) or works having a common playback mode, which are composed of entity information such as AV information and audio information recorded on the DVD and playback control information indicating the playback procedure. Refers to a part of As described in the physical and logical formats of the audio DVD, the user does not instruct the player to directly select a title and start reproduction. The user
A title group including one or a plurality of titles is selected, and reproduction is started. However, the player determines the title group instructed by the AMG and the navigation information in the ATSI from the navigation information, and performs the playback of the title group by continuously playing back each title. ing. Therefore DV
In the D player, the reproduction of the title is fundamental.
Therefore, a title in the DVD audio format and reproduction control of the title will be described by taking an audio / video dual-use disc as an example.

(4.1) Title Type First, the title in the DVD audio format (title 261 in FIG. 4) is also referred to as an audio title (hereinafter “AOTT (Audio Only TiTle)”) constituted by reproducing audio information in the audio area. ), And a video title constituted by reproduction of AV information in the video area. The video title includes an image title (hereinafter also referred to as “AVTT (Audio Video TiTle)”) and a video / audio dual-purpose title (hereinafter “AVTT / AudioTT”).
AOTT (Audio Video TiTle / Audio Only TiTle) "
). In the case of the DVD video format, only an image-only title is used.

AOTT is a title in which only audio information is reproduced, and its actual information is composed of audio information recorded on an AOB in an audio zone.

AVTT is a title in which audio information is always reproduced together with video information, and its actual information is constituted by AV information recorded in a VOB in a video zone. In AVTT, reproduction of only audio information is not permitted, and reproduction with video information is essential.

AVTT / AOTT is a title that can be reproduced only with audio information, and can reproduce audio information together with video information as AV information (that is, it can be called a dual-purpose title). The entity information is constituted by AV information recorded on the VOB in the video zone.

Whether the AVTT / AOTT is reproduced as AV information or audio information depends on the capability of the reproducing apparatus. That is, in a playback device (audio player) having no playback capability of AV information, AVTT / AVTT /
AOTT is played back with audio information only, and playback devices (video players and compatible players) having the ability to play AV information play AVTT / AOTT together with video information and audio information.

By the way, the AMG separately records two pieces of navigation information, that is, navigation information for an audio player and navigation information for a compatible player. The navigation information for the audio player is an audio title (AOTT) composed of audio information in the AOB of the audio zone.
And an audio-only title search pointer describing navigation information for reproducing only the audio information of the dual-purpose title constituted by the AV information in the VOB of the video zone, which is recorded in the audio-only title search pointer table (AOTT_SR). Is done. On the other hand, an audio title search pointer, which is navigation information for a compatible player capable of reproducing all kinds of titles, is recorded in an audio title search pointer table (ATT_SR). These navigation information will be described in more detail with reference to FIG.

When this audio / video dual-purpose DVD is played back by a video player, the VM
The AV information in each VTS is reproduced according to the video player navigation information recorded in G and VTSI.

The audio / video dual-purpose DVD
Is played back by the audio player, AOTT_SR in AMG in the audio zone is referred to, and ATS
The audio information is reproduced according to the reproduction control information for the audio player recorded in I. When audio information is reproduced by an audio player, there are two cases. One is AMG and A of audio zone.
ATSI and APGC which are navigation information in TS
In the case where the audio information in the AOB is reproduced according to I. AMG, ATSI, APGCI
In the case of reproducing the audio information recorded in the VTS in the video zone in accordance with the following. In the latter case, for the same object, the AV
The information is reproduced as information, and the audio player reproduces only the audio information.

Further, the audio / video dual-purpose DV
When the D is reproduced by the compatible player, the ATS in the AMG in the audio zone is referred to as ATT_SR which is the navigation information for the compatible player, and the ATS is referred to.
I, according to the reproduction control information recorded in the VTSI,
The audio information in the audio zone and the AV information in the video zone are integrally reproduced.

The titles of the audio / video dual-use DVD are all managed by the AMG, and are classified into one of the three types of titles in the DVD audio format. Now, consider the case where an audio / video DVD having the logical format example shown in FIG. 6 is reproduced using a compatible player having both the DVD audio format and the DVD video format. This audio / video dual-use DVD
, The volume is composed of seven title groups # 1 to # 7, and each title group is composed of one title. One title includes one or more tracks. FIG.
In the left column, navigation information (ATT_SR) for compatible players, navigation information for video players (TT_SR) in the center column, and navigation information (AOTT_S) for audio players in the right column.
R) shows the image of FIG.

Since the titles # 2 and # 5 are AOTT, only the audio information recorded in the AOB in the audio zone of the audio / video DVD is reproduced when reproducing these titles.

Since the titles # 4, # 6 and # 7 are AVTT, the AV information recorded in the VOB in the video zone of the audio / video DVD is reproduced. Therefore, video and audio are always reproduced.

Titles # 1 and # 3 are AVTT /
Since it is AOTT, the compatible player reproduces both audio and video based on the video and audio information recorded on the VOB in the video zone of the audio / video DVD. When an audio player having no video information reproduction capability is used, only audio information recorded in the VOB in the video zone of the audio / video DVD is reproduced in the titles # 1 and # 3 (see FIG. 6 right column). That is, AVTT / A
The OTT title is created so that the recorded information is reproduced in a manner that maximizes the ability according to the ability of the playback apparatus that plays the DVD disc.

In order to eliminate confusion at the time of reproducing a title group, AVTT uses other types of titles (AOTT,
AVTT / AOTT) and title groups cannot be composed.

(4.2) Dual Management of VOB Next, the concept of PGCI and APGCI defined for the VOB in the video zone of the audio / video DVD will be described. In the VOB, video information and audio information are recorded in a multiplexed form.
When a VOB is reproduced as AV information, the VOB is reproduced in accordance with the PGCI, which is the same concept as in the case of a video DVD. As described above, the manner of recording and reproducing the AV information on the audio DVD is adjusted to the video format, so that the compatibility with the video player is maintained. On the other hand, when only the audio information in the VOB is reproduced, the reproduction is performed in accordance with the APGCI, which is defined independently of the PGCI. This will be described with reference to FIG.

FIG. 7 shows the concept of a program for reproducing one VOB as AV information according to PGCI and for reproducing only one audio information according to APGCI. In FIG. 7, VOB includes video data, sub-picture data, and audio data. When reproducing the VOB as AV information, the reproduction control is performed based on the PGCI. P
In the GCI, the VOB is assigned to six video cells # 1- # 6.
And the video program # 1 is divided by the video cell # 1.
Is converted into video program # 2 by video cells # 2- # 4.
Constitute a video program # 3 by the video cell # 6. When reproducing AV information with a video player or a compatible player such as AVTT / AOTT, reproduction is performed in accordance with such PGCI.

On the other hand, when the audio player reproduces only audio information from the same VOB, the APGC
Reproduction is performed according to I. An audio program defined by the APGCI is composed of one or more audio cells. Here, even for the same object (VOB), the audio cell can be defined (independently) different from the video cell (independently, it is also possible to define the same). That is, the start position, end position, and the like of each audio cell can be set independently of any video cell. The playback order of audio cells defined by APGCI can be defined independently of the playback order of video cells defined by PGCI.

In the example of FIG. 7, audio program # 1
Is composed of audio cells # 1 and # 2, and audio program # 2 is composed of audio cells # 3. The APGCI includes information such as a recording position and a reproduction order of audio cells included in these audio programs, and the audio information is reproduced based on the information.

The reason that the audio cell can be defined independently of the video cell is to manage the audio information independently of the AV information. By doing so, when only the audio information in the VOB is reproduced, time management and the like can be performed independently of the AV information. Also, of the audio information included in the AV information, it is possible to reproduce only a meaningful portion even if it is reproduced only with the audio information. Of course, it may be defined as the same cell.

(4.3) Title Search Pointer Next, reproduction of each title described above using a title search pointer in an audio / video dual-use DVD will be described with reference to FIGS. 6 and 8. FIG.

FIG. 8 shows an example of navigation information of an audio / video DVD. As described above, the audio / video DVD has a video zone according to the DVD video format and an audio zone according to the DVD audio format. Information that can be reproduced from an audio / video DVD is AV information (video information with audio) such as a movie and audio information. Then, when each piece of information is reproduced by various players, navigation information for preventing confusion and inconsistency is recorded on the audio / video dual-purpose DVD separately for each player.

(4.3.1) AMG, ATSI, Title Search Pointer Table In FIG. 8, the audio / video dual-use DVD has an audio zone and a video zone. The audio zones are AMG 202 and ATS # 1, ATS # 2, ATS #
ATS # 1 is composed of ATSI 211 and AO
B210, and ATS # 3 is ATSI212.
Consists of only The video zone is composed of VMG3, VTS # 1, and VTS # 2.
It is composed of a VTSI 11 and a VOB 10.

The AMG 202 includes an AMGI (AMG Information) 240 which is a substantial part of the navigation information. The AMGI 240 includes an AMGI management table 241 including information such as a file size and a recording address of the AMGI 240, an ATT search pointer table 242, an AOTT search pointer table 243,
including. Here, ATT is an audio-only title (AOTT) composed of only audio information, A
V-information title (AVTT) and an audiovisual title (AV
TT / AOTT).

Here, the search pointer is a pointer indicating the recording position on the DVD of the reproduction control information (here, APGCI and PGCI) of each title. As described above, each title includes audio information, A
It is composed of entity information such as V information and playback control information for combining and playing back the entity information. This reproduction control information is recorded in the ATSI in the ATS or the VTSI in the VTS. The search pointer is a pointer that indicates the recording position in the ATSI or VTSI of the reproduction control information of each title. Note that the navigation information is information for managing reproduction of each title, and in the present embodiment, is a concept including the search pointer.

The ATT search pointer table 242 is
It is a table describing navigation information when each title of the audio / video dual-use DVD is reproduced by a compatible player. On the other hand, the AOTT search pointer table 243 stores the audio / video compatible D
It is a table describing navigation information when each title of VD is reproduced by an audio player. Also, the ATT search pointer table 242 and the AOTT
The search pointer table 243 has a one-to-one correspondence, and the number of search pointers described in the ATT search pointer table matches the number of all titles included in the audio / video dual-purpose DVD. For example, as shown in FIG.
If the titles are included, search pointers corresponding to the seven titles are described in the ATT search pointer table 242, and the AOTT search pointer table 243 includes seven search pointers regardless of the title type. A frame for describing the pointer is prepared. Each table frame corresponds to 1: 1.

(4.3.1.1) ATT_SRP Audio title search pointer (ATT_SRP)
Is navigation information used when reproducing an audio / video dual-purpose DVD with a compatible player. Therefore, when the audio / video dual-purpose DVD is set, the compatible player reproduces each title with reference to the ATT_SRP.

The example of the navigation information shown in FIG. 8 corresponds to the example of the audio / video DVD shown in FIG. 6, and the titles # 1 and # 3 are the video / audio dual-purpose title (AVTT / AOTT) and the title # 2, # 5 are audio only title (AOTT), title # 4,
# 6 and # 7 are image-only titles (AVTT).

As already described, three types of titles (AOTT, AVTT / AVTT)
AOTT, AVTT) can be recorded. Therefore, the AMG AT
In the T search pointer table 242, search pointers for all three titles (AOTT, AVTT / AOTT, AVTT) are described.

However, the title search pointer 245 actually written in the ATT search pointer table 242 in FIG. 8 is only the audio-only title search pointer (AOTT_SRP) or the video-only title search pointer (AVTT_SRP). The title search pointer for AVTT / AOTT is described as an image-specific title search pointer (AVTT_SRP) (the actual description is shown in parentheses in the table of FIG. 8). this is,
For a compatible player, a video / audio compatible title (AVTT / AOTT) and a video-only title (AVT)
This is because there is no need to distinguish T). That is, since the compatible player has a playback capability of the DVD video format and plays back all the video and audio titles as AV information, there is no need to distinguish it from the video search pointer (AVTT_SRP) on the navigation information. is there. Therefore, all titles accompanied by image playback are image-specific title search pointers (AVT).
T_SRP) in a common format.

Therefore, as can be seen by comparing the left column of FIG. 6 with the audio title search pointer table 245 of FIG. 8, the ATT search pointer table 242 describing the navigation information for the compatible player has the image-only title (title # 4, 6, 7) and the video / audio compatible title (title # 1, 3), an image-only title search pointer (AVTT_SRP) is described, and the audio-only title (title #
AOTT search pointer (AOTT search pointer (AOTT)
_SRP) is described. The compatible player refers to this table 242, and as shown in the left column of FIG.
The titles # 1, 3, 4, 6, and 7 are reproduced as AV information, and the titles # 2 and # 5 are reproduced as audio information.

(4.3.1.2) AOTT_SRP On the other hand, the AOTT search pointer table 243 describes navigation information for an audio player. Therefore, when the audio / video dual-purpose DVD is set, the audio player refers to the AOTT search pointer table 243 to perform reproduction.

In this table, an audio title (AOTT) and a video / audio compatible title (AVTT / A
A search pointer for OTT) is described. Since the audio player does not have the ability to reproduce AV information, there is no need to describe a search pointer for an image-only title (AVTT). However, the search pointer actually written in this table is the AOTT search pointer (A
OTT_SRP) only. The audio player only needs to have information on whether or not the title can reproduce only the audio. The audio title (AOTT) and the audio / video dual-purpose title (AVTT / AOT) are required.
TT) does not need to be distinguished. Therefore, the audio-only title search pointer table (AOTT_SR
PT) 243, the audio title (AOTT)
And AOTT search pointer (AOTT_SR) without distinguishing between audio and video titles (AVTT / AOTT).
P) is described in a common format.

Therefore, the video and audio dual-purpose title (AVTT
For / AOTT), the image-only title search pointer (AVTT_SRP) is described in the ATT search pointer table 242, but the audio-only title search pointer (AOTT_SRP) is described in the AOTT search pointer table 243. Become.

It should be noted that, for an image-only title (AVTT), only a frame for writing a title search pointer is prepared, but no substantial information is described, or this title does not have AOTT_SRP (only audio). Cannot be reproduced). AOT
This is because the T search pointer table 243 describes navigation information for an audio player, and the audio player cannot reproduce AV information. Therefore, the audio player determines that the title cannot be reproduced, and ignores the description.

With reference to the AOTT title search pointer table 243 described above, the audio player performs the reproduction shown in the right column of FIG. That is, image-specific titles # 4, 6, 7 are ignored, and titles # 1, 2,
The audio information for 3 and 5 is reproduced.

(4.3.2) VMG, VTSI, Title Search Pointer VMG3 is a VM which is a substantial part of the navigation information.
GI (VMG Information). VMGI is VMG
V including information such as file size and recording address of I
It includes an MGI management table 250 and a title search pointer table (TT_SRPT) 251. The title search pointer table 251 is a table that describes navigation information about a video player. Therefore, the video player refers to the title search pointer table (TT_SRPT) 251 and reproduces the title according to the procedure determined in the conventional video format. Therefore, there are two types of titles here: an audiovisual title (AVTT / AOTT) and an image-only title (AVTT), but the title search pointer table (TT_SRPT) 251
, Without distinguishing the two, all TT_SRP
It will be described as.

As described above, the audio / video dual-purpose DV
In D, optimal navigation information is prepared for each of the audio player, the video player, and the compatible player, and recorded as three separate title search pointer tables. This makes it possible to perform optimal reproduction according to the capabilities of each reproduction device.

(4.4) Structure of Search Pointer Table Next, the structure of the search pointer table will be further described in a group.

(4.4.1) ATT_SRP, AOTT_S
RP, TT_SRP The ATT search pointer table 242 includes ATT search pointer information 244 including information such as the number of ATT search pointers, and a plurality of ATT search pointers 245. In FIG. 8, the parentheses of each ATT search pointer indicate the type of search pointer actually described as the search pointer. As described above, the search pointer written in the ATT search pointer table 242 is either AOTT_SRP or AVTT_SRP.

AOTT search pointer table 243
The AOTT search pointer information 246 also includes information such as the number of AOTT search pointers, and a plurality of AOTT search pointers.
T search pointer 247. In FIG. 8, each A
The inside of the circle of the OTT search pointer also indicates the type of the search pointer actually described as the search pointer.
As described above, all search pointers written in the AOTT search pointer table are AOTT_SRP.

The positions of the ATT search pointer and the AOTT search pointer designating the same title in each search pointer table must be the same. That is, the ATT search pointer on the ATT search pointer table 242 and the AOTT search pointer table 24
3 corresponds to the AOTT search pointer on a 1: 1 basis, and ATT_SRP # 1 and AOTT_SRP # 1 specify the same title.

The TT search pointer table 251 similarly includes TT search pointer information 252 including information such as the number of TT search pointers, and a plurality of TT search pointers 2.
54.

Although the ATT search pointer 245 and the AOTT search pointer 247 have a one-to-one correspondence, there is not always a one-to-one correspondence between them and the TT search pointer. However, the TT search pointer is the same as the ATT search pointer and the AOTT search pointer in that the TT search pointer indicates the playback procedure by indicating the PGC that logically constitutes the target title.

(4.5) Reproduction method of each title Next, referring to FIGS.
Reproducing methods of the three types of titles that can be recorded on the VD will be described by classifying the titles for each reproducible player.

(4.5.1) Method of Reproducing Audio Only Title (AOTT) AOTT can be reproduced by audio players and compatible players. AOTT is a title for reproducing audio information. In addition, the main playback modes (functions) of the audio-only title that are to be realized or related to the present invention include the following. However, video and audio compatible titles (AVTT / AOT
In the reproduction by the audio player of T), a reproduction mode that can be realized is also included.

Multi-channel playback: In the DVD audio format, the LPCM audio information in the video zone can be up to 8 channels. Up to 6 channels are possible as a discrete multi-channel. In this case, three front channels + two rear channels +
A total of 24 patterns can be set from 11 combinations of subwoofers, and 13 patterns from combinations of discrete multi-channel parts and signals for 2ch reproduction. Up to 6 channels of LPCM audio information in the audio zone are available. For each channel, 21 patterns are possible in the combination of 3 front channels + 2 rear channels + subwoofer.

2ch reproduction: LPCM audio information of 2ch or less is reproduced as it is. The multi-channel LPCM audio information of the video zone is 2 of CH0 and CH1.
Plays only ch, multi-channel L in audio zone
The PCM audio information is downmixed to 2ch based on downmix coefficients separately defined for each track, and reproduced as 2ch.

Audio selection: 2 for DVD
Audio information of two different reproduction forms is defined as one title, and can be selected by the user. This function is called audio selection. Specifically, the user can select different reproduction modes of 2ch and multi-channel for the same music. As a selection other than 2ch and multi-channel, it is also possible to select and listen to audio information of LPCM recording and audio information recorded by another coding method (compressed voice, 1-bit voice, etc.) for the same music. .

Audio coding mode (linear P
CM, Dolby AC3, MPEG audio, DTS,
SDDS): Indicates the type of encoding system used when recording audio information. LPCMs that are also used on CDs are well known. The other is one of the compression encoding methods.

Multi-channel type: indicates the type of LPCM multi-channel recording in the DVD audio format. For type 1, up to 6 channels can be set. The relationship between each channel and the speaker arrangement can also be set within the combination of 3 front channels + 2 rear channels + subwoofer.

Channel assignment (number of channels,
Speaker arrangement): Shows the number of channels, the relationship between each channel and the output speaker arrangement, and the relationship between each channel and the channel group in the LPCM multi-channel. For example, when a 3ch signal is recorded, CH0 is a Left Front speaker: a signal output from the front left and included in channel group 1, and CH1 is a Ri.
ght Front speaker: A signal output from the front right and included in channel group 1. CH2 is a Surround speaker:
This indicates that the signal is output from the rear and is included in channel group 2. As described above, when the multi-channel type is type 1,
Twenty-one patterns can be set in combinations of three front channels + two rear channels + subwoofers, and the channel assignment information indicates which combination of the 21 patterns.

Multistream: The entity information of the audio recorded in the audio area in the DVD audio format is recorded as a single audio stream in the AOB, but the entity information of the audio recorded in the video area is VOB. Are multiplexed and recorded for each pack together with the video stream. Also VOB
Can multiplex a plurality of audio streams within a limited transfer rate range. For example, 2c
h / LPCM audio stream and multi-channel / LPCM audio stream,
/ LPCM audio stream and AC-3 compressed audio stream can be multiplexed. The user can select the two audio streams having different reproduction modes by specifying the value of the audio selection.

(4.5.1.1) In the case of an audio player First, a method of reproducing an AOTT by an audio player will be described. As described above, the audio player uses AOTT_SRPT243 as the navigation information.
See only. Therefore, when trying to reproduce title # 2, AOTT_SRP # 2 is referred to, and the ATS number (ATS # 1 in this case) including the title and the title number in the ATS are read (FIG. 8, " P
2A (1) "). Next ATS
With reference to the ATSI 211 of FIG.
(2)), A (Audio) PGC corresponding to the title from the title number in the previous ATS
Read I. Therefore, during playback, AOTT_SRP #
The audio information is reproduced by reproducing the audio pack 43 in the AOB 210 in accordance with the APGCI specified by 2 (see the path indicated by “P2A (3)” in FIG. 8).

(4.5.1.2) In the case of a compatible player Next, a method of reproducing the AOTT by the compatible player will be described. The compatible player refers to ATT_SRPT242 as the navigation information. Therefore, when trying to reproduce title # 2, ATT_SR
Refer to P # 2, since it is AOTT_SRP,
It recognizes that the title is AOTT. Since then
As with the audio player, the ATS number (ATS # 1 in this case) containing the title and its AT
Read the title number in S (FIG. 8, “P2C
(1) "). Next ATS # 1
(See the path indicated by “P2C (2)” in FIG. 8), and reads the APGCI corresponding to the title from the title number in the previous ATS. Therefore, during playback, the APGC specified by ATT_SRP # 2
The audio information can be reproduced by reproducing the audio pack 43 in the AOB 210 according to I (see the path indicated by “P2C (3)” in FIG. 8).

(4.5.2) Title for Image-Only Title (AVTT) Next, the reproduction path of the image-only title will be described. The image-only title can be played by a video player and a compatible player.

(4.5.2.1) In the case of a video player The video player uses TT_S as navigation information.
With reference to the RPT (title search pointer table) 251, processing is performed according to the video format playback procedure. Therefore, first, the title search pointer table 251 of the VMG 3 is referred to. Here, the description position of the search pointer on each title search pointer table 242, 243 of the title corresponding to the audio navigation, and the title search pointer table 251 of the VMG3
The description position of the title search pointer above does not have to correspond to 1: 1. That is, the contents and order of the ATT search pointer table 242 of AMGI and the TT search pointer table 251 of VMGI can be defined independently. However, to avoid confusion,
In the title search pointer table 251, VMGI
If there is no title corresponding to the TT_SRP 254, the frame is described as a rule on the TT search pointer table. Therefore, the title number is
May be different as shown by. In other words, the audio / video DVD of the example shown in FIG. 6 has seven titles, but the video player has a title # of AOTT.
2 and # 5 are not reproduced, so the remaining 5
Titles (titles # 1, # 3, # 4, # 6, #
The TT_SRP for 7) is described in the title search pointer table 251. Therefore, TT_SRP # 1- # in title search pointer table 251
5, titles # 1, # 3, # 4, and # shown in FIG.
6, # 7.

TT_SRP 254 indicates a PGC that logically constitutes a target title. Therefore, the video player reads the VTS number (VTS # 1 in this case) including the title and the title number in the VTS from the search pointer (FIG. 8, "P3V").
(1) "). Next applicable VTS # 1
(See the path indicated by “P3V (2)” in FIG. 8), and reads the PGCI corresponding to the title from the title number in the previous VTS. Therefore, the video player acquires the PGCI and reproduces the title as AV information using a video pack, an audio pack, and the like in the VOB (see “P3V” in FIG. 8).
(3) ").

(4.5.2.2) In the case of a compatible player Next, the compatible player uses an image-specific title (AV
The path for reproducing (TT) will be described. Compatible players use ATT_S as navigation information.
Reference is made only to the RPT 242. Therefore, this ATT_S
With reference to RP # 4, which is AVTT_SRP, it recognizes that the title is an image-only title. As described above, it does not match the title number in the video player. However, after that, the ATT___________________________________Are the case, like the video player read from TT_SRPT.
From the SRP 245, a VTS number (VTS # 1 in this case) including the title and a title number in the VTS are read (see the path indicated by “P4C (1)” in FIG. 8). Next, the VTSI 11 of the corresponding VTS # 1 is referred to (see the path indicated by “P4C (2)” in FIG. 8),
The PGCI corresponding to the title is read from the title number in the previous VTS. Therefore, the compatible player also obtains the PGCI and uses the video pack, audio pack, and the like in the VOB to convert the title to A.
It is reproduced as V information (see the path indicated by “P4C (3)” in FIG. 8).

(4.5.2.3) Case of Audio Player Next, the case of an audio player will be described. The audio player uses AOTT as navigation information.
Only the _SRPT 243 is referred to. Therefore AOTT_S
PR # 4 is read, but since there is no corresponding AOTT, the reproduction is stopped.

(4.5.3) Video and audio dual-purpose title (AVT
T / AOTT) The audio / video title is reproduced by all of the audio player, video player, and compatible player. Therefore, description will be made in this order.

(4.5.3.1) In the case of an audio player First, a method in which an audio player reproduces an audiovisual title will be described. The audio player refers only to AOTT_SRPT243 as the navigation information. Therefore, by referring to AOTT_SRP # 1, the ATS number including the title (in this case,
ATS # 3) and reads the title number in the ATS (see the path indicated by “P1A (1)” in FIG. 8). Next, reference is made to the corresponding ATSI 212 of ATS # 3 (FIG. 8,
Refer to the path indicated by “P1A (2)”), and from the title number in the previous ATS, the APGCI corresponding to the title
Read out. However, this ATS # 3 does not include audio data as an entity, and this APGCI is VTS # 1.
3 shows a reproduction procedure for the VOB 10 of FIG. Therefore, at the time of reproduction, only the audio information is reproduced by reproducing only the audio pack 43 in the VOB 10 according to the APGCI (see the path indicated by “P1A (3)” in FIG. 8).

(4.5.3.2) In the case of a video player Next, a method by which the video player reproduces an audio / video title will be described. As described above, the video player performs processing in accordance with the video format playback procedure regardless of the type of disc. Therefore, first of all, VM
The title search pointer table 251 of G3 is referred to. The title number here is # 1, which matches the title number on the audio navigation. Subsequent paths are the same as in the case of (5.2.1), and thus description thereof will be omitted. (See the path shown in FIG. 8, "P1V (1), (2), (3)")

(4.5.3.3) In the case of a compatible player Next, a method for a compatible player to play a video / audio compatible title will be described. The compatible player refers to only ATT_SRPT242 as the navigation information. Therefore, by referring to ATT_SRP # 1, it is recognized that it is AVTT. Thereafter, as in the case where the video player has read from TT_SRPT 251, the VTS number (also in this case, VTS # 1) including the title and its VTS are read from ATT_SRP 245.
Read the title number in the box (Fig. 8, "P1C
(1) "). Subsequent passes are the same as in the case of the video player, and thus description thereof is omitted (FIG. 8,
"See paths indicated by P1C (2) and P1C (3)).

As described above, by having not only the navigation information for video and the navigation information for audio, but also having information for integrating them or having information for associating them, titles having various playback modes are different. Inconsistency and confusion when the file is reproduced by various players having different reproduction capabilities.

(5) Title Management Information As described above, the user selects a desired title group or a track included therein and instructs reproduction. The reproducing device automatically selects a title or a title including the specified track, which constitutes the specified title group, according to the capability of the reproducing device, and starts reproduction.

Further, in the DVD audio format, when an audio title (AOTT) or an audiovisual title (AVTT / AOTT) is reproduced by an audio player, the logical structure is such that audio information can be selected. First, the navigation information of the structure for realizing this function will be described with reference to FIG. FIG. 9 shows the ATS shown in FIG. 3 or FIG.
FIG. 2 is a block diagram showing the structure of a power supply 203 in detail.

(5.1) The ATSI ATS 203 has the ATSI 211 as the navigation information and the audio entity information (AOTT) as described above.
AOTT_AOBS as a set of (_AOB210)
A as backup for 210 'and ATSI 211
It is composed of TSI_BUP 213.

As shown in FIG. 9, the ATSI 211 includes an ATSI_MAT 270 as management information and an ATS_PGCIT 271 as a table of reproduction control information.

(5.1.1) ATSI_MAT ATSI_MAT 270 of the management information describes address information of various tables, attribute information on audio entity information, downmix coefficients, and the like.

(5.1.1) Attribute Information The attribute information includes the AOTT_AOB 210 included in the AOTT_AOBS 210 ′ and each AOTT_AOB.
For each 210, its coding method, sampling frequency, number of quantization bits, number of channels, multi-channel type, channel assignment, and the like are described. Thus, AT
If there is an AOTT_AOBS 210 ′ in S203, a plurality of types of audio information are stored in another AOTT_AOBS.
B210 will be separately recorded in AOTT_AOBS210 '. Also, ATS203
Some do not have AOTT_AOBS 210 ′, and the attribute information in this case includes VOB (AOTT_VOB, AVTT_VOB) 1 recorded in the video zone.
Attribute information about the audio stream of 0 is described. Therefore, when a plurality of types of audio information are recorded in the VOB as a plurality of streams in the VOB 10, the stream number and the attribute information are described here for each stream.

(5.1.2) ATS_PGCIT ATS_PGCIT 271 describes a table 275 of a search pointer (ATS_PGCI_SRP) 275 for searching for ATS_PGCITI 272 and playback control information corresponding to a title, and describes playback control information (ATS_PGCI). ) 276 is composed of a table 274 of itself.

(5.1.2.1) ATS_PGCI_SRP In the present invention, in order to record a plurality of different types of audio information on a disc, and to treat, in principle, audio information having a common recording target as the same work and the same music, As shown in FIG. 10 and FIG. 11, a PGC 300 as management information is introduced, and one title 261 is added.
Is associated with a plurality of different types of audio information. The details of a method of managing audio information using the PGC 300 will be described later. However, in the present invention, when associating a plurality of different types of audio information with one title 261, a logical structure obtained by blocking the PGC 300 is used. Have.

[0150] The reproduction control information of the audio entity information managed by the PGC 300 is ATS_PGC.
I276, and ATS_PGCI_SRP 275 includes ATS_PGCI 27 corresponding to each title 261.
6 is described. For example, each ATS_
Whether or not the PGC 300 is an entry is described for each PGCI 276. The entry is information indicating that the entry is the PGC 300 representing the PGC block. Also, ATS_PGCI_SRP 275 contains A
The title number in the TS 203, whether or not a PGC block is formed, the relationship in the PGC block (the beginning, in the block, and the end), the block type, the number of channels, the encoding method, the start address of the ATS_PGCI 276, and the like are described. You.

As described above, at the start of title playback, the ATS_PRP of the AMG 202 indicates the corresponding ATS_P with the ATS number and the ATS title number.
Although it has been described that the GCI 276 is acquired, the ATS_PGCI_SRP 275 of the ATS 203 of the corresponding number is described.
Shows that ATS_PG corresponding to the ATS title number
The location where CI 276 is recorded can be known.

When a plurality of pieces of audio information correspond to one title, a plurality of ATS_PGCI_SRPs 275 having the same ATS title number exist. In this case, the determination is made in accordance with other information (block type, number of channels, coding method), and the optimum PGC 300 is selected to start reproduction.

(5.1.2.2) Following the ATS_PGCI search pointer table, ATS_PGCI 276 as playback control information corresponding to each title is arranged to form a table.

In the present invention, in order to manage the audio entity information by the PGC 300, as shown in FIG. 10 or FIG. 11, segment information called a program 301 is used. The program 301 is information that divides the above-described cell 220 into reproduction units such as one song, and is information corresponding to the track 260. Therefore, the PGC 300 corresponding to the title 261 manages one or a plurality of programs 301, and this information is stored in the ATS_PGCI 276.
Is described in

One ATS_PGCI 276 is a PGC
Information about the whole 300 (ATS_PGC_GI) 29
0, and each program 301 constituting the PGC 300
ATS_PGIT29 that collects information about
1, a table ATS_C_PBIT 29 that collects information on each cell 220 constituting the program 301
2

(5.1.2.2.1) ATS_PGC_GI In the ATS_PGC_GI 290, the number of programs, the number of cells, the PGC playback time, the start address of each table following this information, etc. are described as information on the entire PGC 300.

(5.1.2.2.2) ATS_PGIT Following the ATS_PGC_GI 290, the PGC 300
ATS_PG about the program 301 constituting the
I are arranged in the order of reproduction in the number of programs, and table A
TS_PGIT 291 is formed. One ATS_
The PGI includes information for continuous reproduction, information for specifying an attribute of audio entity information (AOB) reproduced by the program, information for specifying a downmix coefficient, a cell number corresponding to the beginning of the program, PT
Information such as S, program reproduction time, and the like are described.

[0158] The information for specifying the attribute of ATS_PGI can be obtained only by specifying the attribute information of the audio entity information specifically written in the ATSI_MAT 270 by using an attribute number, and making the two correspond to each other. Detailed attribute information of the program can be obtained. Since this attribute number has a structure that can be defined for each program, the DVD audio format has a structure in which the attribute can be changed for each music piece.

However, ATS_PGCI_SRP275
Among them is information on attributes. ATS_PGCI_
The attribute information described in the SRP 275 is information for selecting different types of audio entity information, and is a description of only the attribute information common to each program 301. Conversely, even though the attributes can be freely set for each program, the encoding method must be common. When PGC blocks are assembled, PGC300
It is necessary to observe the restriction that the number of channels of all the programs 301 is unified for 2 ch or less or 3 ch or more.

The cell number corresponding to the head of the program indicates which cell 220 this program 301 corresponds to.

(5.1.2.2.3) ATS_C_PBIT Following ATS_PGIT 291, information ATS_C_PBI about the cells constituting the PGC 300 is arranged in the order of reproduction in the number of cells, and the table ATS_C_PBIT2
92 are formed. In one ATS_C_PBI, an index number, a cell type, a start address, an end address, and the like are recorded. Title 26 here for the first time
The address of the audio entity information corresponding to 1 on the disc is known.

For example, a user has a certain title group 2
It is assumed that the third song of 62 has been designated. It is assumed that the title group 262 is composed of one title 261. The acquisition of the ATS_PGCI corresponding to the title 261 is as described above. Program # 3 because it is the third song
Is read, and the first cell number #n in the ATS_PGIT 291 is obtained. Program 301
(# 3) is found to start from cell 220 (#n), so it reads the n-th ATS_C_PBI, obtains the start address described here, jumps there, and starts playback of the third song Will be done.

(5.2) Recording Method of Audio Information Next, a description will be given of how a plurality of types of different audio information are recorded in the present embodiment.

As described in the description of the physical structure of each audio disc, ATS 203 and VTS 3 include AOB 210 as audio entity information and VOB 10 as AV entity information, respectively. Furthermore, each of the entity information to be reproduced as an audio title is AO
Also referred to as TT_AOB, AOTT_VOB. Multiple AOs
A group of TT_AOB and AOTT_VOB is AOTT_AOBS and AOTT_VO, respectively.
BS.

The plurality of types of different audio information are as follows.
Specifically, it is classified into the following three types.

A. A plurality of audio information having different recording conditions (for example, normal recording and binaural recording, recording in front of a hall and recording in an S seat, one-point recording and recording with a multi-microphone, etc.) b. A plurality of audio information with different encoding methods (for example, LPCM and MPEG, Dolby AC-3, SDDS, DT
S, etc.) c. A plurality of audio information having different reproduction modes (the number of channels is 2ch or less or 3ch or more) The recording status, encoding method, and reproduction mode can be determined independently of each other. However, the plurality of different types of audio information to be treated here are, in principle, audio information that is commonly recorded and should be treated as the same work (title) and the same song (track). A plurality of these different types of audio information are recorded on the disc in two different ways.

(5.2.1) Even if the AOTT_VOBS DVD audio format has a plurality of audio streams, the recording format of the audio information when accompanied by image information is the DVD-Video format because it is compatible with the DVD-Video format. The same recording method was used. Therefore, when recording a plurality of different types of audio information together with image information,
The same entity information (AOTT_VOB) is multiplexed and recorded as a separate stream. As described in the video format, the VOB 10 defines image information, audio information, sub-picture information, and the like as separate streams.
048 bytes), multiplexed in this unit, and recorded on a disc as one system stream.

Here, up to eight types of audio information can be defined, so that different types of audio information can be recorded as separate streams having different stream numbers. When such a recording method is adopted, compatibility with the DVD video format can be obtained. Another advantage is that the type of audio information can be easily changed only by changing the stream processed by the playback device during playback. Furthermore, when viewed as a video title, since it is recorded in one entity information, it can be naturally treated as the same title and the same track. Therefore, a plurality of pieces of audio information having different numbers of channels and the like can be appropriately recorded without causing confusion to the user.

However, such a stream multiplexing method is inappropriate for an audio format.
In a DVD disc, there is a limitation that the total data transfer rate of all streams must be equal to or less than 10.08 Mbps. Therefore, two streams as shown in Table 1 below cannot be multiplexed.

[0170]

[Table 1]

In audio DVD, uncompressed LPCM
Since voice must be recorded, the required data transfer rate is high when the sampling frequency is high or when the number of channels is large. Therefore, when recording a plurality of uncompressed LPCM voices mainly using audio information, the stream multiplexing method can be said to be inappropriate.

The audio format is required to have a function for recording and compatibility with the currently used studio equipment, and to be particularly simple in recording. When a video stream and a plurality of variable-rate streams are multiplexed as in the DVD video format, management information must be placed in data. In addition, the management information has a structure in which address information relating to several data before and after is described, and if it is considered as a recording device, it cannot be recorded on a disk unless several data before and after are prepared. Therefore, there arises a problem that a simple recorder cannot be constructed. In addition to the current studio equipment, a new authoring device is required. There is also a problem.

(5.2.2) A plurality of blocks AOTT_AO
In the case where only BS audio information is recorded, solving the above-mentioned problems has become a more important issue, and a structure required as an audio format has been adopted. Therefore, only one type of audio stream is recorded in one entity information (AOTT_AOB), and when a plurality of different types of audio information are recorded, another entity information (AOTT_AOB) is recorded in another area on the disc. And recorded separately. By doing so, the data transfer rate of one audio information becomes
If it is 10.08 Mbps or less, a structure capable of recording any number is obtained. Also, since only one type of audio stream is recorded, the audio information is uncompressed LPC
If the data is of a fixed rate like M, there is no need to put management information in the data, and the processing at the time of recording becomes simple.

It is not necessary to simultaneously reproduce 2ch audio information and multi-channel audio information, and there is little need to switch instantly. Therefore, if the information is separately recorded as different entity information, the processing involved in switching during reproduction becomes complicated, but it can be said that this is not a major problem.

However, in this case, a mechanism for treating a plurality of entity information as the same title is required. Also, with the same mechanism, it is necessary to uniformly handle audio information recorded as a plurality of streams in AOTT_VOB.

(5.3) Audio Selection As described above, there are roughly two methods of recording a plurality of different types of audio information, but each has a problem. Therefore, the present invention solves the problems in the respective methods by providing the following logical structure to the reproduction control information, and enables appropriate audio selection. Here, the audio selection refers to switching between a plurality of different types of audio information recorded in different areas on the disc, which need to be treated as the same title.

First, when a method of separately recording a plurality of different types of audio information as separate entity information (AOTT_AOB) in another area on the disc is adopted,
As shown in FIG. 10, the recording method of the audio entity information (in the case of FIG. 10, the recording form: 2ch and multi-ch)
(In this case, an audio title, AOTT_AOB 210
For the reproduction of (AOB # 1, AOB # 2)), the cells 220 constituting each AOB 210 are divided into units of the program 301 as the second division unit. Further, each program 301 is identified by a program number (# 1, # 2, # 3,...) As second section information. The program 301 is a playback unit corresponding to the track 260, and corresponds to, for example, one music piece. Therefore, each audio entity information (AOTT_AOB210 (AOB
# 1, AOB # 2)) have the same contents, though the recording methods are different, so the number and order of the programs 301 for each audio entity information are the same. FIG.
In the case of 0, it is composed of programs # 1, # 2 and # 3, respectively.

Next, each of the programs 301 (programs # 1, # 2, and # 3) is divided into separate PGCs 300 (PGC # 1, PGC #
Summarize by 2). And these PGC300
(PGC # 1 and PGC # 2) on the same track 261
(Track # 1 in the case of FIG. 10), so that the same track 260 (# 1) has a program 3 including audio entity information of different recording formats.
01 (programs # 1, # 2, # 3). That is, according to the present invention, the audio entity information in the program unit identified by the program number as the second section information, and the audio entity information having different recording methods are respectively assigned to the track numbers (# 1, # 1) as the first section information. #
, # 2, # 3,...) As the first division unit, which is related to the same track 261 having the same track number by using separate PGCs 300 as management information. I have.

In this manner, a plurality of different types of audio information can be converted into different entity information (AOTT_A
Even if the method of recording separately in another area on the disc as OB) is adopted, the same title,
A PG that manages audio entity information of a recording method that is recognized as the same song and that matches the user's instruction or the capability of the playback device
By selecting C300, a plurality of different types of audio entity information can be handled uniformly.

Next, in the recording area of the video format,
In the case of adopting a method of recording audio entity information having a different recording method by the stream multiplexing method, as shown in FIG. 11, audio entity information AOTT_VOB10 is used.
(VOB # 1 in the case of FIG. 11) is divided into blocks and the respective recording methods (in the case of FIG. 11, recording form: 2ch)
And a separate PGC 300 provided for each multi-channel)
Using PGCs # 1 and # 2 in the case of FIG. 11, they are related to the same track 261 (track # 1 in the case of FIG. 11). It should be noted that each of the PGCs 300
1 (programs # 1, # 2, # 3 in the case of FIG. 11) is the same as in the case of FIG.

By adopting such a logical structure, since each PGC 300 manages the recording method of each audio entity information, the PGC 300 does not directly refer to the navigation information in the audio stream.
Only by selecting C300 according to the recording method, audio information of a desired recording method can be appropriately reproduced. That is, according to the present invention, audio information recorded in a video format can be managed by control information in an audio format. Of course, even in this case, the user recognizes the same title and the same song. Therefore, a plurality of different types of audio information can be handled in a unified manner by selecting a PGC that matches the instruction of the user or the capability of the playback device.

As described above, according to the present invention, even when audio information is recorded in AOTT_AOB (when an audio title is reproduced), AOTT_V
The audio selection can be performed by the same mechanism even when recorded in the OB (when reproducing the video / audio title). According to the present invention, the audio title (AOTT) or the video / audio title (AVTT / AVTT /
AOTT) is effective when playing back with an audio player.

Further, how the audio selection is performed will be described in a specific example with reference to FIGS.

(5.3.1) Audio Selection in Audio Title First, a case where an audio title is reproduced by an audio player or a compatible player will be described. here,
It is assumed that all title groups are composed of one title. It is assumed that the playback device is dedicated to 2ch or that the user has set to select 2ch playback. It is also assumed that the user has instructed reproduction of the title group 262 (#j).

As described above, the title group 262
The ATS number and the ATS title number of the title corresponding to are obtained by referring to AOTT_SRP247 (see FIG. 8). As a result, it is assumed that the ATS number is # 2 and the ATS title number is # 3. The flow up to this point is as described in (4.5.1.1) in the case of an audio player and (4.5.1.2) in the case of a compatible player.

Next, the ATSI 211 of the ATS # 2 is read, and the attribute information written in the ATSI_MAT 270 is stored (see the path indicated by “P12 (1)” in FIG. 12). At this stage, the attribute of each track of the title to be reproduced cannot be specified. For the time being, all the attribute information is stored.

Subsequently, ATS_PGCIT 271 is read,
The PGCI search pointer (ATS_PGCI)
_SRP) 273 (FIG. 12, “P12
(2) "). AT in this table
ATS_P whose S title number (ATS_TTN) is # 3
Look for GCI_SRP273. In this case, the ATS_PGCI whose ATS title number is # 3 as the first division information
It can be seen that there are two _SRPs 273 (# 3 and # 4), forming a PGC block. So, which P
It is determined whether GC 300 is to be selected. In this case, since the playback device is dedicated to 2ch or the user is set to select 2ch playback, the item of the block type is viewed. Here, it is described that PGC blocks are formed due to the difference in the number of channels.
O channels item 284 (see FIG. 9 and FIG. 12), the PGC 300 which is written as 2 ch or less.
Select Then, an address (16384 in this case) in which the reproduction control information ATS_PGCI 276 of the selected PGC 300 is written is obtained, jumped there, read and read and stored (FIG. 12, P12).
(3) ").

[0188] The reproduction control information includes an information table for the program 301 corresponding to the track 260;
There is an information table for the cell 220. To start playback from the beginning of the title, use the AT of program # 1.
By looking at the S_PGI, the attribute of the program # 1 is specified using the information for specifying the attribute of the program # 1 and the attribute information stored earlier. An audio decoder is set according to this attribute. Next, from ATS_PGI, program # 1
(In this case, since the program to be reproduced is program # 1, the start cell number is also # 1), and ATS_C_PB corresponding to that number is read.
The address recorded in the cell 220 is read from I and jumped to that point to start reproduction (FIG. 12, "P1
2 (4) ").

In the case of normal reproduction, the ATS_C_ stored in the memory being reproduced until the next program starts.
Continue playing the cell using PBI. When the reproduction of the program is completed, a series of processing for reproducing the next program is also performed using the ATS_PGI and the attribute information in the memory, and the reproduction is started. This operation is repeated until the end of the title. Therefore, as described above, all the attribute information in the management information and the reproduction control information ATS_PGCI must be stored.

Next, it is assumed that the playback apparatus supports multi-channel playback and that the user has set so as to select multi-channel playback. It is also assumed that the user has instructed reproduction of the title group 262 (#j).

The ATS number # 2 and ATS title number # 3 of the title corresponding to the title group 262 are obtained, and the ATSI 211 of the ATS # 2 is read. Up to this point, the operation is the same as when 2ch reproduction is selected (FIG. 1).
2. See the path indicated by "P1M (1)"). Also, AT
The attribute information written in the ATSI_MAT 270 of the SI 211 is stored, the ATS_PGCIT 271 is read, and the ATS_PGC search pointer 273 therein is read (see the path indicated by “P1M (2)” in FIG. 12).
The processing so far is no different from the case where 2ch reproduction is selected.

In this table, ATS_PGC_SRP2 having ATS title number (ATS_TTN) # 3
Look for 73. In this case, the AT whose ATS title number is # 3
There are two S_PGCI_SRP (# 3 and # 4) PGC
It can be seen that a block is formed. Therefore, it is determined which PGC 300 is to be selected. In this case, since the playback apparatus is compatible with multi-channel playback and the user is set to select multi-channel playback, the item of the block type is viewed. here,
Since it is written that the PGC block is formed due to the difference in the number of channels, the next step is Audio channel.
P which is written as 3ch or more in s item 284
Select GC300. Then, the address (24576 in this case) where the reproduction control information ATS_PGCI 276 of the selected PGC 300 is written is acquired, the control jumps there, and the reproduction control information is read and stored (FIG. 12).
(See the path indicated by “P1M (3)”).

The subsequent processing is basically the same as when 2ch reproduction is selected, except that the PGC 300 to be processed is different and the entity information to be reproduced is different. From the information table on the program in the reproduction control information, the program #
By looking at the ATS_PGI of No. 1, the attribute of the program # 1 is specified, and the audio decoder is set. Next, ATS_
From the PGI, the AT of the first cell number # 1 of the program # 1
The S_C_PBI is read, the address where the cell # 1 is recorded is read, and a jump is made there to start reproduction (see the path indicated by "P1M (4)" in FIG. 12).

(5.3.2) Audio Selection in Video and Audio Dual Title A case where an audio and video title is reproduced by an audio player will be described. Here, it is assumed that all title groups 262 are composed of one title. It is assumed that the playback device is dedicated to LPCM or that the user has set to select LPCM playback. Also, when the user enters the title group 262
It is assumed that reproduction of (#j) is instructed.

As described above, the title group 262
The ATS number and the ATS title number of the title 261 corresponding to are obtained with reference to AOTT_SRP247.
As a result, the ATS number is # 2, and the ATS title number is #
Suppose it was 4. The flow up to this point is as described in (4.5.3.1) Audio Player.

Next, the ATSI 212 of the ATS # 2 is read, and the attribute information written in the ATSI_MAT 270 is stored (see the path indicated by "P2L (1)" in FIG. 13). At this stage, the attribute of each track of the title to be reproduced cannot be specified. For the time being, all the attribute information is stored. Also, in this case, since the video and audio dual-purpose title is to be reproduced, the corresponding ATS 203 is an ATS with no entity information and only navigation information.

Subsequently, ATS_PGCIT 271 is read,
The PGCI search pointer 273 in this is read (see the path indicated by “P2L (2)” in FIG. 13). ATS title number (ATS_TTN) in this table
Looks for ATS_PGCI_SRP273 of # 4. In this case, the ATS title number is # 4 ATS_PGCI_S
It can be seen that there are two RPs 273 (# 4 and # 5) forming a PGC block. So, which PGC3
It is determined whether to select 00.

In this case, since the playback device is dedicated to LPCM or the user has set to select the playback of LPCM, the item of the block type is viewed. Here, it is described that the PGC block is formed according to the difference in the number of channels and the encoding method.
The PGC 300 in which LPCM is written is selected by looking at the item 285 of the ding mode.

Next, the reproduction control information AT of the selected PGC
The address at which the S_PGCI 276 is written (in this case, 24576) is obtained, jumped there, and the reproduction control information is read and stored (FIG. 13, “P2L (3)”).
(See the path indicated by.)

[0200] The reproduction control information includes an information table for the program 301 corresponding to the track 261;
There is an information table for the cell 220. To start playback from the beginning of the title, use the AT of program # 1.
By looking at the S_PGI, the attribute of the program # 1 is specified using the information for specifying the attribute of the program # 1 and the attribute information stored earlier. An audio decoder is set according to this attribute. Next, from ATS_PGI, program #
1 is read (in this case, since the program to be reproduced is program # 1, the start cell number is also # 1), and ATS_C_P corresponding to that number is read.
The cell reads the recorded address of the cell from BI, jumps there, and starts reproduction (FIG. 13, "P2L
(4) ").

In the case of normal reproduction, the ATS_C_ stored in the memory being reproduced until the next program starts.
Continue playing the cell using PBI. When the reproduction of the program is completed, a series of processing for reproducing the next program is also performed using the ATS_PGI and the attribute information in the memory, and the reproduction is started. This operation is repeated until the end of the title. Therefore, as described above, all the attribute information in the management information and the reproduction control information ATS_PGCI must be stored.

Next, the reproducing apparatus performs multi-channel reproduction and AC-3 (a type of encoding method: Dolby Dig).
ital), and the user is set to select the reproduction of AC-3. It is also assumed that the user has instructed reproduction of the title group 262 (#j).

The ATS number # 2 and the ATS title number # 4 of the title 261 corresponding to the title group 262 are obtained, and the ATSI 211 of the ATS # 2 is read.
The operation up to this point is the same as the case where the LPCM reproduction is selected (see the path indicated by “P2A (1)” in FIG. 13). Also, the attribute information written in the ATS_MAT 270 of the ATSI 211 is stored, the ATS_PGCIT 271 is read, and the ATS_PGC search pointer 273 therein is read (see the path indicated by “P2A (2)” in FIG. 13). The processing so far is no different from the case where the LPCM reproduction is selected.

A search is made for a PGC 300 whose ATS title number (ATS_TTN) is # 4 in this table. In this case, there are two PGCs with ATS title number # 4
It can be seen that the C block is configured. Therefore, it is determined which PGC 300 is to be selected.

In this case, since the playback apparatus supports multi-channel playback and AC-3, and the user is set to select the playback of AC-3, the book type item is checked. Here, since PGC blocks are written according to the difference in the number of channels and the coding method, next, the PGC written as AC-3 is selected by looking at the item 285 of Audio coding mode. Then, the reproduction control information ATS_ of the selected PGC
The address where PGCI 276 is written (in this case, 3
2768), jumps to it, reads and stores the playback control information (see the path indicated by “P2A (3)” in FIG. 13).

In the subsequent processing, the PGC to be processed is different.
This is basically the same as the case where LPCM reproduction is selected, except that the streams to be reproduced are different. In the playback control information,
By looking at the ATS_PGI of the program # 1 from the information table relating to the program, the attribute of the PG # 1 is specified, and the audio decoder is set. Next, from the ATS_PGI, the ATS_C_ of the head cell number # 1 of the program # 1
The PBI is read, the address at which cell # 1 is recorded is read, and jumping is performed to start reproduction (FIG. 13,
(See the path indicated by “P2A (4)”). However, in this case, since the entity information (AOTT VOB) to be reproduced is the same,
The jump destination address is the same as when LPCM reproduction is selected.

(6) Reproducing Device (6.1) Video DVD Player As shown in FIG. 14, the video DVD player according to the embodiment comprises a pickup 80, a demodulation / correction section 81, stream switches 82 and 84, a track buffer 8
3, a system buffer 85, and a demultiplexer 86
And VBV (Video Buffer Verifier) buffer 87
, A video decoder 88 and a sub-picture buffer 89
, A sub-picture decoder 90, a mixer 91, an audio buffer 92, an audio decoder 93, an input unit 98, a display 99, a system controller 100, a drive controller 101, a spindle motor 102, and a slider motor 103. It is composed of The configuration shown in FIG.
In the configuration of the player, only a portion related to reproduction of video and audio is described, and a servo circuit and the like for performing servo control of the pickup 80, the spindle motor 102, the slider motor 103, and the like are the same as those in the related art. Description and detailed description are omitted.

Next, the operation will be described.

The pickup 80 includes a laser diode, a beam splitter, an objective lens, a photodetector, and the like (not shown), irradiates the DVD 1 with a light beam B as reproduction light, and reflects the light beam B from the DVD 1. It receives light and outputs a detection signal Sp corresponding to information pits formed on the DVD1. At this time, a method similar to that of the prior art is applied to an objective lens (not shown) so that the light beam B is accurately irradiated on the information track on the DVD 1 and accurately focused on the information recording surface on the DVD 1. Performs tracking servo control and focus servo control.

[0210] The detection signal Sp output from the pickup 80 is input to the demodulation and correction section 81, where demodulation processing and error correction processing are performed to generate a demodulation signal Sdm, which is output to the stream switch 82 and the system buffer 85. .

The opening and closing of the stream switch 82 to which the demodulated signal Sdm is input is controlled by a switch signal Ssw1 from the drive controller 101. When the stream switch 82 is closed, the input demodulated signal Sdm is passed through as it is to the track buffer 83. I do. On the other hand, when the stream switch 82 is open, the demodulated signal Sdm is not output, and unnecessary information (signal) is not input to the track buffer 83.

The track buffer 83 to which the demodulated signal Sdm is inputted is constituted by a FIFO (First In First Out) memory or the like, and temporarily stores the inputted demodulated signal Sdm and the stream switch 84 is closed. , The stored demodulated signal Sdm is continuously output.

The stream switch 84 to which the demodulated signal Sdm is continuously input prevents the buffer in the subsequent stage from overflowing in the demultiplexer 86 or from becoming empty to stop the decoding process. Opening and closing are controlled by a switch signal Ssw2 from the system controller 100.

On the other hand, the system buffer 85, to which the demodulated signal Sdm is input in parallel with the track buffer 83,
D1 is first detected when loading, DVD
Management information (VMG) relating to the entire information recorded in
2) or the VTS 11 for each VTS 3 is stored and output to the system controller 100 as control information Sc, and the DSI data 51 for each navigation pack 41 is temporarily stored during reproduction, and is stored as control information Sc in the system controller 100. Output.

In the demultiplexer 86 to which the demodulated signal Sdm is continuously input via the stream switch 84, video data, audio data, sub-picture data, and PCI data for each navi-pack are extracted from the demodulated signal Sdm. , The video signal Sv, the sub-picture signal Ssp, the audio signal Sad, and the PCI signal Spc.
Are output to the VBV buffer 87, the sub-picture buffer 89, and the audio buffer 92, respectively.

At this time, the demultiplexer 86 extracts a pack header, a packet header, and the like from each pack (including the audio pack 43) and the packet, and outputs the information contained in each to the system controller 100 as a header signal Shd. .

The VBV buffer 87 to which the video signal Sv is input is constituted by a FIFO memory or the like, and temporarily stores the video signal Sv and outputs it to the video decoder 88. The VBV buffer 87 is for compensating the variation in the data amount of each picture (see FIG. 2) in the video signal Sv compressed according to the MPEG2 system. Then, the video signal Sv in which the variation in the data amount has been compensated is input to the video decoder 88, demodulated by the MPEG2 method, and output to the mixer 91 as a demodulated video signal Svd.

On the other hand, the sub-picture buffer 89 to which the sub-picture signal Ssp is inputted temporarily stores the inputted sub-picture signal Ssp and outputs it to the sub-picture decoder 90.
The sub-picture buffer 89 is for outputting the sub-picture data 44 included in the sub-picture signal Ssp in synchronization with the video data 42 corresponding to the sub-picture data 44. Then, the sub video signal Ssp synchronized with the video data 42 is input to the sub picture decoder 90, demodulated, and output to the mixer 91 as a demodulated sub video signal Sspd.

The demodulated video signal Svd output from the video decoder 88 and the demodulated sub-video signal Sspd (corresponding to the demodulated video signal S
Synchronized with vd. ) Are mixed by a mixer 91 and output to a display unit such as a CRT (Cathod Ray Tube) (not shown) as a final video signal Svp to be displayed.

[0220] The audio buffer 92 to which the audio signal Sad is input is constituted by a FIFO memory or the like.
The input audio signal Sad is temporarily stored and output to the audio decoder 93. Audio buffer 9
Reference numeral 2 denotes a video signal Sv or a sub-video signal Ssp including video information corresponding to the audio signal Sad based on the header control signal Shc output from the system controller 100.
The audio signal Sad is delayed in accordance with the output state of the corresponding video information. Then, the audio signal Sad time-adjusted so as to synchronize with the corresponding video information is output to the audio decoder 9.
3 based on a header control signal Shc output from the system controller 100 and subjected to a reproduction process in the linear PCM system, thereby obtaining a demodulated audio signal Sadd.
Is output to a speaker or the like (not shown). In the case of an audio DVD including only music information, the synchronization processing with the video information is unnecessary.

(6.2) Audio DVD Player Next, FIG.
This will be described with reference to FIG. As shown in FIG. 15, the audio DVD player differs from the video DVD player shown in FIG. 14 in the configuration of the subsequent stage of the demultiplexer 86, but has the same configuration except for the above. Therefore, the components after the demultiplexer 86 will be described.

In the demultiplexer 86 to which the demodulated signal Sdm is continuously input via the stream switch 84, audio information is extracted for each pack from the demodulated signal Sdm and output to the audio buffer 92 as an audio signal Sad. .

An audio buffer 92 to which the audio signal Sad is input is constituted by a FIFO memory or the like.
The input audio signal Sad is temporarily stored and output to the audio decoder 93. Audio signal Sad
Is input to the audio decoder 93 and is subjected to a reproduction process or the like in the linear PCM system based on the control signal Shc output from the system controller 100, and is output as a demodulated audio signal Sadd to a speaker (not shown) or the like.

For example, real-time information such as real-time text is output from the demultiplexer to the RTI buffer. The data temporarily stored in the RTI buffer is output to an RTI decoder based on a control signal Shc output from the system controller 100, and displays lyrics and the like on a display device (not shown).

If it is detected that the sound needs to be temporarily interrupted (paused) during reproduction or the like immediately after accessing desired information, the system controller 10
From 0, the pause signal Sca is output to the audio decoder 93, and the audio decoder 93 temporarily stops outputting the demodulated audio signal Sadd.

FIG. 16 shows the structure of the audio decoder 93. As illustrated, the audio decoder 93 includes a signal processing unit 120 including a digital filter and the like, a D / A converter 121, an analog output circuit 122 including an amplifier and the like, a digital output circuit 123, and a RAM 124.
a and the clock circuit 12
5 is provided.

The system microcomputer 124 exchanges control signals Sca with the system controller 100 to control the operation of the clock circuit 125, the signal processing unit 120, the D / A converter 121, and the analog output circuit 122. The system microcomputer 124 has a RAM 124a inside. The RAM 124a temporarily stores audio attribute information supplied as a control signal Sca from the system controller 100. The system microcomputer 124 uses the RA
Reference is made to the audio attribute information stored in the M124a, and the contents are referred to the clock circuit 125 and the signal processing unit 12.
0. Specifically, the system microcomputer 124
Supplies the sampling frequency information in the audio attribute information to the clock circuit 125. The clock circuit 125 has an oscillator and supplies a clock signal fs corresponding to the specified sampling frequency to the signal processing unit 120. Further, the system microcomputer 124 supplies the information on the sampling frequency, the number of quantization bits, the number of channels, and the presence / absence of emphasis in the audio attribute information to the signal processing unit 120 and provides the D / A converter 121 with the information on the number of channels. Further, the system microcomputer 124 supplies the analog output circuit 122 with information such as the degree of amplification of the signal of each channel. The information of the amplification degree for each channel is included in the audio attribute information, and the system controller 100
Can be supplied from

The signal processing section 120 includes a clock circuit 125
The system microcomputer 1 uses the clock signal fs from
In accordance with the information such as the encoding method (such as linear PCM or Dolby AC3), the sampling frequency, and the number of quantization bits obtained from the H.24, decoding of the audio signal supplied from the audio buffer 92 or processing such as band limitation is performed. , And performs de-emphasis processing according to the information on the presence or absence of emphasis, and outputs the result to the D / A converter 121. The D / A converter 121 is connected to the system microcomputer 1
In accordance with the channel information obtained from 24, the input signal is divided for each channel and further output to the analog output circuit 122 as an analog signal for each channel. Further, the signal processing unit 120 outputs the digital audio signal Sadd to the outside via the digital output circuit 123.

(6.3) Compatible DVD player Although not shown, a compatible DVD player is shown in FIG.
14 includes a VBV buffer 87, a video decoder 88, a sub-picture buffer 89, a sub-picture decoder 90, and a mixer 91 in the video DVD player shown in FIG. It is configured to be able to reproduce both audio and audio formats.

(7) Audio Selection in Reproducing Apparatus The audio selection in the reproducing apparatus is to switch the type of audio information to be reproduced when an audio player reproduces an audio title or a video / audio title.

As the type of audio information, (5.2)
Audio information recording methods are mainly classified into the following three types as described above.

A. Recording situation b. Coding scheme c. Playback mode (7.1) When blocks are formed according to recording conditions (binaural) When recording conditions are different, it is sufficient to always switch according to the user's preference irrespective of the capabilities of the device, and it is not necessary to perform initial settings and the like. In the case of binaural recording,
It is also possible for the playback device to implement the following switching method.

Here, binaural recording for realizing binaural reproduction will be described in detail.

First, consider the case where a normal stereo signal is reproduced by headphones. For example, as shown in FIG.
Two microphones are arranged at predetermined positions in a concert hall, and the outputs of these microphones are reproduced by headphones. In this case, the reproduced sound field is formed in the back of the listener's head as shown by the diagonal lines in FIG. This is because in a normal stereo reproduction signal sound field using speakers, the sound image is completely localized on one of the speakers, so the level difference between the left and right speakers is about 25 dB. In this case, the sound is completely localized to one ear with a level difference of about 10 dB. As described above, when listening to music recorded in a normal stereo manner through headphones, there is a problem that the stereo feeling is too strong and a natural sense of reality cannot be obtained.

On the other hand, in the binaural reproduction, a dummy head having acoustic impedance and characteristics substantially equal to those of an actual human is prepared, and microphones are mounted around the external auditory canal of both ears of the dummy head, as shown in FIG. As shown in the figure, for example, the dummy head is placed in the audience seat of a concert hall, and the output of the microphone in the dummy head is reproduced by the headphones. When such binaural reproduction is performed, the sound field reproduced around the listener's head is shown in FIG.
7 (A) is the range indicated by oblique lines. Therefore, a more natural sense of realism can be obtained when listening with headphones or earphones.

In order to realize such binaural reproduction, it is a binaural recording to record music using the dummy head as described above. Such a binaural-recorded work and a stereo-recorded work are performed. By multiplexing both of them as shown in FIG. 18, for example, and recording them on a DVD disk, it is possible to perform appropriate reproduction according to the listening mode. Note that the recording method is not limited to the multiplexing method, and audio entity information recorded in stereo and audio entity information recorded in binaural recording may be recorded in different AOBs 210, respectively.

Whether or not to perform binaural reproduction is determined by
For example, a headphone jack 400 is provided in the playback device as shown by a dotted line in FIG.
Is determined based on whether or not a headphone plug is inserted into the headphone.

The headphone jack 400 has a circuit configuration as shown in FIG. 19, for example, and includes a switch section 401 which is pushed up by contact with a headphone plug.
Are provided on both the upper and lower parts of the plug. Then, when these switch portions 401 are pushed up, the switch portions 401 are opened, and it is possible to detect that the plug is inserted.

With such a configuration, when the headphone plug is inserted into the headphone jack 400 and a user designates a certain music, the PGC 300 that manages the binaurally-recorded audio entity information by the above-described procedure. The selected and binaurally recorded audio entity information is automatically reproduced.

Therefore, the user can listen to the desired music that has been binaurally recorded simply by inserting the headphone plug into the headphone jack 400.

Note that whether or not a headphone plug has been inserted into the headphone jack 400 can be detected at an appropriate timing such as at the start of reproduction or during reproduction.
Also, when the headphone plug is inserted into the headphone jack 400, instead of selecting the audio entity information that has been recorded twice as normally, the input unit 9 shown in FIG.
The setting operation by 8 may be configured so that the user sets the priority. For example, when a high priority is set for the reproduction of the stereo recording, the user can listen to the stereo entity recorded audio entity information through the headphones.

(7.2) When blocks are assembled according to the encoding method When the encoding methods are different, if the reproducing apparatus does not support the encoding method of the audio information recorded on the disc (the corresponding decoder is If you don't have it), you can't hear the sound. In such a state, the user is confused. Therefore, it is determined that audio information of LPCM is recorded on all discs, and that all playback devices can reproduce LPCM. Therefore, the user
Regardless of the audio DVD disc, LP
Only the audio information recorded in the CM can be reproduced.

On the other hand, various coding systems are currently in practical use. Many of these are compression encoding systems, and have the feature that data can be used effectively, especially when recording multi-channels. As described above, when there is audio information recorded by various encoding methods according to the purpose, selection and reproduction can be performed from the audio information only when the reproducing apparatus has a corresponding decoder. In this case, the playback device performs the audio setting in the ATS_PGCI_SRP 273 described above according to the temporary setting by the user, the initial setting by the user, and the setting by the playback device.
Judgment is made from the information indicating the coding method written in the coding mode item 285, and optimal audio information is selected and reproduced according to the flowchart shown in FIG.

Note that each setting process is performed in accordance with FIG. 14 or FIG.
The input unit 98 shown in FIG. Further, the set information is transmitted to the system controller 10.
It can be configured to be stored in a memory within 0.

When the DVD disk is set in the reproducing apparatus or when the reproduction is to be started, the control information recorded on the DVD disk is read by the system controller 100 as described above, and the DV is read.
The recording form, reproduction form, encoding method, and the like of the audio entity information recorded on the D disk are displayed on the display 99.
May be displayed. With such a configuration, the user can appropriately know the settings that can be selected on the DVD disc, and can perform an appropriate selection operation.

In the following, an example of a process for selecting a PGC from information indicating an encoding method will be described with reference to the flowchart shown in FIG.

First, when the selection process is started (step S1), ATS_PGCI_SRP 273 is read (step S2), and ATS_PGCI_SR is read.
The coding system described in the item 285 of Audio coding mode described in P273 is read (step S3). Next, it is determined whether or not the playback device has a capability of performing playback by the read encoding method (step S4). As a result, if the playback device does not have the ability to perform playback using the read encoding method (step S4; No), ATS_PGCI_SRP273 is again activated.
Is repeated (step S2).
On the other hand, if the playback device has the ability to perform playback using the read encoding method (step S4; Yes), it is determined whether or not the user has selected the read encoding method as a temporary setting. (Step S5). This setting is performed when starting playback or during playback, for example, by a remote control device or the like.For example, when a specific song is to be played back using an encoding method different from the existing setting, Done. As a result of the determination, if the user has selected the read encoding method as a temporary setting (step S5; Ye
s), ends the selection processing, and returns the ATS_PGCI_SR
The PGC 300 indicated by P273 is selected, and reproduction is started (step S8).

However, if the user has not selected the read encoding method as the temporary setting (step S5; No), it is determined whether the user has selected the read encoding method as the initial setting. Is determined (step S6). This initial setting is to perform the basic encoding method of the playback device according to the user's own preference and the like. If this initial setting is made, all the settings are performed unless the above-mentioned temporary setting is performed. The music is reproduced by the initially set encoding method. In other words, when the user has selected the read encoding method as the initial setting (step S6; Yes), the selection processing ends, and the ATS
The PGC 300 indicated by _PGCI_SRP 273 is selected, and reproduction is started (step S8).

If the user has not selected the read encoding method as the initial setting (step S30).
6; No), it is determined whether or not the read encoding method is selected as a setting of the playback device (step S).
7). This setting is performed at the stage of manufacturing the reproducing apparatus. Unless the above-mentioned various settings are performed by the user, all the songs are reproduced according to the set encoding method. That is, when the read encoding method is selected as the setting of the reproducing device (step S7; Yes), the selection process is terminated and the ATS_
The PGC indicated by PGCI_SRP 273 is selected and reproduction is started (step S8).

Note that, due to an error in the read data, etc.,
If the read encoding method has not been selected as a setting of the playback device (step S7; No), A
The processing from reading the TS_PGCI_SRP 273 is repeated (step 2).

(7.2) When a Block is Formed According to the Playback Mode The selection of the playback mode here means to select whether to perform 2ch (stereo) playback or multi-channel playback. If the playback device supports multi-channel, it is possible to select and play back audio information of multi-channel recording. However, the original multi-channel reproduction can be performed only when the user has a system (a plurality of amplifiers and speakers) capable of reproducing multi-channels and the reproduction apparatus is connected to the system. Therefore, also in this case, according to the temporary setting by the user, the initial setting by the user, and the setting by the playback device, the ATS_PGCI described above is used.
Judgment is made from the information indicating the number of channels written in the item 284 of Audio channels described in the _SRP 273, and the optimum audio information is selected and reproduced according to the same flow as the above-described flowchart.

(7.3) Case where blocks are assembled according to encoding method and reproduction form As shown also in the example of FIG. 12, the difference in the type of audio information in a block is that both the encoding method and the reproduction form are different. There is. In such a case, the following processing is required.

A priority is set for all combinations of each encoding method and each reproduction mode that can be processed by the reproducing apparatus. Examples are shown in Table 2. Such settings can be made as necessary by temporary setting by the user, initial setting by the user, and setting by the playback device.

[0254]

[Table 2]

In Table 2, the smaller the number in the table, the higher the priority.

According to the priority setting, the optimum audio information is selected and reproduced as shown in the flowchart of FIG. Hereinafter, an example of a process of selecting optimal audio information and reproducing the audio information will be described with reference to the flowchart shown in FIG.

First, when the selection process is started (step S10), ATS_PGCI_SRP 273 is obtained (step S11), and ATS_PGCI_SRP 273 is obtained according to the block type.
_PGCI_SRP 273, an encoding method described in the item 285 of Audio coding mode, and an audio channel.
The reproduction mode described in the item 284 of nels is read (step S12). Next, it is determined whether or not the playback device has a capability of performing playback by a combination of the read encoding method and the playback mode (Step S13).
As a result, when the reproducing apparatus does not have the ability to perform the reproduction by the combination of the read encoding method and the reproduced form (step S13; No), the ATS_PGCI_
The processing from reading the SRP 273 is repeated (steps S11 to S11). On the other hand, if the playback device has the ability to perform playback based on the combination of the read encoding method and the playback device (step S13; Yes), the user temporarily stops the combination of the read encoding method and the playback device. It is determined whether or not a priority order has been set for selection as a typical setting (step S14). If the priority is set (step S14;
Yes), for the combination of the read encoding method and the reproducing apparatus, a priority order for selection as a temporary setting by the user is set as a priority order number (step S15). Then, it is determined whether the set priority number is the smallest in the block (step S1).
9) If it is the smallest (step S19; Ye)
s), ends the selection processing, and returns the ATS_PGCI_SR
The PGC 300 indicated by P273 is selected, and reproduction is started (step S20).

However, when the set priority number is not the smallest number in the block (step S1).
9; No), ATS_PGCI_S next to the block
The process from the acquisition of RP 273 is repeated (step S1
1). Then, for the next combination of the encoding method and the reproduction mode, as described above, it is determined whether or not the reproduction device has the reproduction capability, and whether or not the priority is set as the temporary setting by the user. Is determined, and processing according to the determination result is performed (steps S13, S14, S1).
5).

On the other hand, if the priority is not set as a temporary setting by the user for the next combination of the encoding method and the reproduction mode (step S14; N
o), it is determined whether or not a priority order is set as an initial setting by the user for the combination (step S16). If the priority is set (Step S16; Yes), the priority as the initial setting by the user is set as the priority number for the combination of the read encoding method and the reproducing device (Step S16). S17). Then, it is determined whether or not the set priority number is the smallest in the block (step S19). If the priority number is the smallest (step S19; Ye)
s), ends the selection processing, and returns the ATS_PGCI_SR
The PGC 300 indicated by P273 is selected, and reproduction is started (step S20).

However, if the set priority number is not the smallest number in the block (step S1).
9; No), ATS_PGCI_S next to the block
The process from the acquisition of RP 273 is repeated (step S1
1). Then, for the next combination of the encoding method and the reproduction mode, as described above, it is determined whether or not the reproduction device has the reproduction capability, and whether or not the priority is set as the temporary setting by the user. A determination and a determination as to whether or not a priority is set as an initial setting by the user are performed, and processing according to the determination result is performed (steps S13, 14, 15, 16, and 17).

On the other hand, if no priority is set as the initial setting by the user for the next combination of the encoding method and the reproduction mode (step S16; N
o), the priority of the initial setting of the reproduction apparatus from the beginning for the combination is set as a priority number (step S18). Then, it is determined whether the set priority number is the smallest in the block (step S1).
9) If it is the smallest (step S19; Ye)
s), ends the selection processing, and returns the ATS_PGCI_SR
The PGC 300 indicated by P273 is selected, and reproduction is started (step S20).

As described above, when a priority is set for a combination of an encoding method and a reproduction mode, the combination of the combination is set as the setting mode of the smallest number among the set priorities. Based on the selection of the PGC 300 and the reproduction by the combination.

As described above, for each combination of each encoding method and each reproduction mode, priority is given to each of the temporary setting by the user, the initial setting by the user, and the setting by the reproducing apparatus, as necessary. Can be determined, even if a plurality of different types of audio information are recorded, the user can select and reproduce the optimal audio information without having to select the type each time. .

In the example described with reference to FIG. 20 and FIG. 21, if a specification is made that does not conform to the reproduction capability of the reproduction apparatus and that none of the settings is selected. May be configured to display a warning by display means such as the display 99.

[0265]

According to the information recording medium of the present invention, it is possible to manage audio information of the same content having different attributes under the content, so that the user can obtain audio information of the same content having different attributes. Also, it is not necessary to specify each audio information, and it is possible to perform appropriate reproduction without causing confusion to the user.

[Brief description of the drawings]

FIG. 1 is a diagram showing a physical structure (physical format) of a video DVD.

FIG. 2 is a diagram showing a logical structure (logical format) of a video DVD.

FIG. 3 is a diagram showing a physical structure (physical format) of an audio DVD.

FIG. 4 is a diagram showing a logical structure (logical format) of an audio DVD.

FIG. 5 is a diagram showing types of DVDs.

FIG. 6 is a diagram showing an example of an audio / video dual-use DVD.

FIG. 7 is a diagram illustrating the concept of dual management of the same object.

8 is a diagram showing an example of navigation information defined for the audio / video DVD shown in FIG. 6;

FIG. 9 is a diagram showing information recorded in an ATS.

FIG. 10 is a diagram showing a relationship between the user's recognition at the time of reproducing an audio title, navigation information, and entity information.

FIG. 11 is a diagram showing the relationship between the user's recognition and the navigation information and the entity information at the time of reproducing the audiovisual title.

FIG. 12: DVD recorded in audio format
FIG. 3 is a diagram showing information recorded in ATSI of a disc.

FIG. 13 is a diagram showing information recorded on the ATSI of a DVD disc recorded in an audio format and a video format.

FIG. 14 is a diagram showing a schematic configuration of a video DVD player.

FIG. 15 is a diagram showing a schematic configuration of an audio DVD player.

16 is a diagram showing a configuration of an audio decoder in the audio DVD player of FIG.

17A is a diagram showing a sound field formed when normal stereo-reproduced music information is reproduced by headphones, and FIG. 17B is a diagram showing a case where binaural-reproduced music information is reproduced by headphones. FIG. 4 is a diagram illustrating a sound field to be performed.

FIG. 18 is a conceptual diagram showing that an audio pack recorded in two channels by a stereo method and an audio pack recorded in two channels by a binaural method are multiplexed.

FIG. 19 is a diagram illustrating an example of a circuit configuration of a headphone jack.

FIG. 20 is a flowchart illustrating an example of a process of selecting a PGC from information indicating an encoding method.

FIG. 21 is a flowchart illustrating an example of a process of selecting a PGC from information obtained by combining an encoding method and a reproduction mode.

[Explanation of symbols]

 3 ... VMG 10 ... VOB 11 ... VTSI 202 ... AMG 204 ... SAPPT 210 ... AOB 211 ... ATSI 240 ... AMGI 242 ... ATT Search Pointer Table 243 ... AOTT Search Pointer Table 245 ... ATT Search Pointer 247 ... AOTT Search Pointer 251 ... TT Search Pointer table 254 TT search pointer 261 Title 300 PGC 301 Program

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kaoru Yamamoto, Inventor Kaoru Yamamoto, Kawagoe-shi, Saitama 25-fig. 1 Pioneer Corporation Kawagoe Factory (72) Inventor Yoshinori Hasegawa 1-4-1, Meguro, Meguro-ku, Tokyo Pioneer Corporation Headquarters

Claims (6)

[Claims] 1. An audio information recording area (ATS) in which a plurality of pieces of audio entity information (AOB) of the same work and different attributes are recorded, and playback control information (ATS_PGCI) defined for each of the audio entity information are recorded. Playback control information recording area (ATSI)
The playback control information recording area includes identification information (ATS_PGCI_SPR) for associating a plurality of pieces of audio entity information (AOB) having different attributes with the same work. An information recording medium characterized by the above-mentioned. 2. The information recording medium according to claim 1, wherein the identification information further includes attribute information (ATS_PGC_CAT) indicating an attribute of the audio entity information. 3. The recording medium according to claim 1, wherein the identification information includes recording position information (ATS_PGCI_SA) on a recording medium of reproduction control information (ATS_PGCI) defined for each of the audio entity information. Information recording medium as described. 4. The information recording medium according to claim 1, wherein the identification information includes block type information indicating a type of the attribute. 5. The information recording medium according to claim 4, wherein the block type information is information indicating whether the number of channels is different or the encoding method is different. 6. The identification information includes a title number of each piece of audio entity information, and a plurality of pieces of audio entity information having the same work but different attributes have the same title number. 6. The information recording medium according to any one of 1 to 5.