JP3345352B2 - Recording method of recording medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording method for a recording medium on which multimedia data including digital moving image data, audio data, and sub-picture data is recorded, and particularly to a method for dynamically reproducing and outputting. Switching technology.

[0002]

2. Description of the Related Art In recent years, laser disks and video CDs have been put into practical use as optical recording media for recording multimedia data in which moving images, audios, and the like are mixed. Conventionally, a brief description will be given of what data format of moving image data and audio data compressed using MPEG forms data called a system stream in an optical disc.

FIG. 1 is an explanatory diagram showing how compressed moving image data and compressed audio data form an integrated data string called a system stream in the prior art. In the figure, a "video data sequence" is a serial video data sequence in a compressed stage, and is packetized for every certain number of bytes, and for each number of packets to be interleaved, the video 1, 2,.
It is expressed as follows. "Audio data string"
The audio signal containing the LR component is packetized for every certain number of bytes after being compressed, and is expressed for each of a plurality of packets as audio 1, 2,... In the figure. These packets are interleaved in an appropriate order in consideration of the buffer size and the playback time of the playback device, and are recorded on the optical disc as a system stream in the figure.

[0004] Using such a system stream,
A case where a karaoke disk is produced from a video CD will be described. Here, it is assumed that different playback is performed for each duet, male part, and female part using the same background video data. In this case, for the duet, the background video data to which the subtitle images of the lyrics of both parts are added,
A system stream interleaved with accompaniment-only audio without singing voice is required. For the male part, a system stream in which the background video data to which the subtitle video of the lyrics of the male part is added and the audio containing the singing voice of the female part are required to be interleaved. For the female part, the reverse system stream is required.

In a video CD, it is necessary to record these three as different system streams. That is, it is necessary to have background video data redundantly in three system streams. FIG. 2 shows an explanatory diagram of the system stream in this case. In the figure, system stream 1 is for duet, and video data in which images showing lyrics of both parts are superimposed on a background video,
Audio data of only accompaniment is interleaved. The system stream 2 is for the male part, and data in which an image indicating the lyrics of the male part is superimposed on the video for the background and accompaniment audio data containing the song of the female part are interleaved. The system stream 3 is for a female part, and video data in which an image indicating the lyrics of the female part is superimposed on a background video, and accompaniment audio data containing a song for the male part are interleaved. In addition, the menu system stream displays a duet, male part, and female part selection menu, and determines which system stream is to be played when the duet, male part, and female part are played and the menu is selected. The recorded menu information table is recorded. As described above, in the video CD, the duet, the male part, and the female part are supported by three independent system streams.

[0006]

However, according to the conventional video CD and its reproducing apparatus, once the reproduction of any of the system streams for duet, male part and female part is started, There is a problem that it is not possible to change to another part without stopping the progress of the reproduction during the reproduction, that is, without stopping the reproduction of the moving image.

More specifically, in the video CD karaoke example, for example, while the audio data for the female part is being reproduced, the user can make a duet without stopping the progress of the music, that is, without stopping the reproduction of the moving image. Even if I wanted to switch, I couldn't switch to playing duet audio data. This is because the duet, the male part, and the female part are each represented by an independent system stream. That is, in the menu information table, only one of the system streams is selected at the time of starting the reproduction, and the reproduction is started from the same reproduction position of the duet system stream in synchronization with the reproduction position of the female part system stream. Because you can't.

Further, in the case of a video CD, the same main video data is redundantly recorded in different system streams, and there is a problem that the recording efficiency of the disc is poor. An object of the present invention is an optical disc in which a plurality of audio data and a plurality of sub-picture data are interleaved and recorded together with moving image data, and even during reproduction,
It is an object of the present invention to provide a recording method for a recording medium that enables dynamic switching of audio data to be reproduced together with moving image data, sub-picture data, or a combination thereof.

Another object of the present invention is to provide a data structure which realizes effective reproduction according to the contents of reproduction data.
It is an object to provide a recording method of a recording medium .

[0010]

Means for Solving the Problems A record for achieving the above object
The recording method of the medium includes the steps of creating data and creating
Recording the recorded data on a recording medium,
The data includes moving image data and a plurality of data to be selectively reproduced.
Audio data and multiple sub-video data
And a video object including
The project consists of a plurality of units.
Is a first part which is data of a predetermined section of the moving image data
Data and a predetermined section of each of the plurality of voice data.
A plurality of second partial data which are data and the plurality of sub-pictures;
A plurality of third data which is data of a predetermined section of each image data
And the partial data, and a valid control information during reproduction of the first partial data in the unit belonging, the control information, Yu
And one of said second partial data to be reproduced simultaneously with the first partial data in the knitting, showing the combination of one of the third partial data to be reproduced simultaneously with the first partial data 1 or more.

According to this structure, the control information recorded in the unit is always read together with the moving image data even during the reproduction of the object. Can be dynamically switched. Further, the user can switch to a combination suitable for the content of the title.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The multimedia optical disk in this embodiment is an example in which a digital video disk (hereinafter abbreviated as DVD) having a recording capacity of about 4.7 gigabytes per side is used for an optical disk having a diameter of 120 mm. I do. <Physical Structure of Optical Disk> FIG. 3 is a cross-sectional view of a DVD. The DVD 107 has a first transparent substrate 108 having a thickness of about 0.6 mm (0.5 mm or more and 0.7 mm or less), an information layer 109 having a reflective film such as a metal thin film adhered thereon, and a second Transparent substrate 111, information layer 109
And a second transparent substrate 111, which is formed from an adhesive layer 110 for bonding the two, and further a label printing layer 112 on the second transparent substrate 111 if necessary.
Is provided. The print layer 112 may be provided partially.

In FIG. 1, the lower surface from which the light beam 113 is incident and information is taken out is referred to as a front surface A, and the upper surface on which the print layer 112 is formed is referred to as a back surface B. First transparent substrate 10
Irregular pits are formed on the surface where the information layer 8 and the information layer 109 are in contact with each other by a molding technique, and information is recorded by changing the length and interval of the pits. That is, the pit shape of the unevenness of the first transparent substrate 108 is transferred to the information layer 109. The length and interval of the pits are shorter than in the case of a CD, and the pitch of the information tracks formed by the pit rows is configured to be narrow. As a result, the areal recording density is improved.

The surface A of the first transparent substrate 108 where no pits are formed is a flat surface. The second transparent substrate 111 is a reinforcing substrate for reinforcement, made of the same material as the first transparent substrate 108 and having the same thickness of about 0.6 mm and having a flat surface on both sides. Extraction of information is performed using the light beam 1
When the light 13 is irradiated, the light spot 114 is extracted as a change in reflectance.

The light spot 114 of the DVD has a large numerical aperture NA of the objective lens and a small wavelength λ of the light beam, and thus has a diameter of about 1 / 1.6 as compared with the light spot of the CD. A DVD having such a physical structure can record about 4.7 gigabytes of information on one side. A storage capacity of about 4.7 gigabytes is about eight times as large as a conventional CD. For this reason, the quality of moving images can be significantly improved in DVDs, and the playback time can be improved to 2 hours or more compared to 74 minutes in video CDs. Due to such a recording capacity, a DVD is very suitable for a moving image recording medium.

The basic technology for realizing such a large capacity is to reduce the spot diameter D of the light beam. Since the spot diameter D is given by a calculation formula of spot diameter D = laser wavelength λ / numerical aperture NA of the objective lens, the spot diameter D is narrowed down by further reducing the laser wavelength λ and increasing the numerical aperture NA. be able to. It should be noted that when the numerical aperture NA of the objective lens is increased, coma aberration occurs due to the relative tilt between the disk surface and the optical axis of the light beam, which is called tilt. In order to reduce this, in DVDs, the thickness of the transparent substrate is reduced. Another problem that the mechanical strength is weakened when the transparent substrate is made thinner is raised. However, the DVD is reinforced by bonding another substrate, thereby overcoming the problem of strength. Actually, it is desirable that the two substrates have the same material and thickness.

For reading data from a DVD, a red semiconductor laser having a short wavelength of 650 nm and an NA of an objective lens are used.
An optical system whose (numerical aperture) is increased to 0.6 mm is used. This, combined with the reduction of the thickness of the transparent substrate to about 0.6 mm, led to an information capacity of about 4.7 Gbytes that can be recorded on one side of an optical disc having a diameter of 120 mm. Such a large capacity also makes it possible to record one movie produced by a movie company on one common disc and provide it to many different languages.

3. Realized by these basic technologies
The recording capacity of 7 Gbytes has a surplus even when a plurality of moving image data and audio data are recorded. <Video Object Recorded on DVD> FIG. 4 is an explanatory diagram showing how the compressed moving image data and the compressed audio data form an integrated data sequence called a video object. The video object recorded on the DVD corresponds to the conventional system stream shown in FIG. 1, but has a different data structure, and is called a video object (hereinafter abbreviated as VOB) to distinguish it from the system stream. .

FIG. 1 shows an original moving image data string, audio data string, and sub-picture data string together with a VOB. This is MPEG2 (Moving Picture Expert Group)
p, ISO 13818). The “moving image data sequence” is a serial moving image data sequence in a compressed stage, and includes a GOP (Gr.
oup Of Picture) in the unit of “video
1, video2, video3 ... ".
Here, the GOP is moving image data of about 12 to 15 frames in moving image data and about 0.5 to about 1 second in reproduction time, and is composed of a plurality of video packs packed in units of 2 kbytes. .

In the "audio data sequence", audio signals including LR components and surround components of stereo audio are integrated by compression processing.
These three types of audio signals are "audio A-1, audio A-2 ...
・ ・ 」「 Audio B-1, audio B-2 ・ ・ ・ ・ 」「 audio C-1, a
udio C-2 ... ". audio A-
1, audio A-2... Are each composed of one or more audio packs packed in units of 2 kbytes.

The "sub-picture data sequence" is a data sequence including compressed graphics, and in FIG.
A-1, SP A-2, ... "and" SP B-1, SP B-2, ... ". Each of SP A-1, SP A-2,... Is composed of one or more sub-picture data video packs packed in units of 2 kbytes. These moving image data strings, audio data strings, and sub-picture data strings are interleaved and recorded in the VOB. The interleaved cycle is
In the same figure, it is a GOP unit.

Further, what should be noted in this embodiment is that the VO
B is that management information is interleaved. The minimum unit including the management information and other data in the VOB is hereinafter abbreviated as VOBU. In the management information, information for realizing interactive reproduction, particularly information for switching between audio data and sub-picture data to be reproduced together with moving image data in a reproduction device, is recorded. The reason why the size of each pack is 2 kB is to make it the same size as the minimum read unit of the reproducing apparatus, that is, the logical block (sector) of FIG. 6 described later. further,
The management information is one (one pack) for one VOBU. This is useful for easily realizing dynamic playback control even in a playback device having a small memory capacity.

According to such a data structure of the VOB, for example, in a VOB for recording a movie, audio data in multiple languages and subtitle data for subtitles in multiple languages can be recorded together with moving images, as in the prior art. Since there is no need to provide separate system streams for each, the recording capacity of the optical disk can be used efficiently. FIG. 5 is an explanatory diagram showing packed data formats of video data, audio data, sub-picture data, and management information interleaved in a VOB.

As shown in the figure, each data in the VOB is represented by MP
It is recorded in a packetized and packed format conforming to EG2. In this embodiment, one pack includes PES (Pa
The packet includes one packet called a "cketized Elementary Stream" packet, and is composed of a pack header, a packet header, and a data field, and has a size of 2 Kbytes.
The detailed contents of the “pack header” indicating the beginning of the pack and the “packet header” indicating the beginning of the packet conform to MPEG2, and thus the description is omitted. Will be described.

"Stream I" included in the packet header
The “D” field indicates whether the packet is a video packet representing a video data sequence, a private packet, or an MPEG packet.
This is an 8-bit length field indicating whether the packet is an audio packet. Here, the private packet is an MP
The data may be freely defined in the EG2 standard. In this embodiment, the private packet 1 is defined as audio data and sub-picture data, and the private packet 2 is defined as management information. I have.

The private packet 1 is further provided with a substream ID field. “Substream ID” is an 8-bit length field indicating whether the data is audio data or sub-picture data. A maximum of eight types of audio data defined by the private packet 1 can be set from # 0 to # 7 for each of the linear PCM system and the AC-3 system. Also, a maximum of 32 types of sub-video data from # 0 to # 31 can be set. The stream ID and the substream are used in the playback device to determine and separate what type of pack the read information is.

The "data field" is MPEG2 format compressed data for video data, linear PCM format, AC-3 format or MPEG format for audio data.
This is a field in which graphics data or the like compressed by run-length encoding is recorded in the case of data of a system or sub-picture data. <Data Structure of Entire Disk> FIG. 6 schematically shows the data structure of the entire optical disk in this embodiment.

As shown in the figure, the area where data is recorded on the optical disk is roughly divided into a lead-in area, a volume area and a lead-out area. Further, the volume area includes a volume management area and a file area, and the file area includes a video manager file (hereinafter abbreviated as a video manager) and a plurality of video title set files (hereinafter abbreviated as a video title set). In this embodiment, the video manager and the video title set are each treated as one file for convenience of explanation. However, for example, when a movie is stored, the file capacity becomes enormous. Is desirably divided into a plurality of files and continuously arranged on an optical disk.

The "lead-in area" is located at the innermost circumference of the optical disk, and records data for stabilizing operation at the start of reading of the reproducing apparatus. The “lead-out area” is located at the outermost circumference of the optical disc, and records data indicating that the volume area has ended. "Volume area"
Is located between the lead-in area and the lead-out area,
Physically, it consists of a very large number of logical blocks (also called sectors) as a one-dimensional array on a spiral track. Each logical block is 2 kbytes and is distinguished by a block number (sector address). The logical block size is a minimum read unit by the playback device, and is the video data, audio data, sub-picture data,
It matches the size of each pack in the management information.

The "volume management area" is obtained from the head block by the number of blocks necessary for managing the entire disk.
(Organization) According to the 13346 standard, information on files in the file area is recorded. “Video manager” indicates management information of the entire disc. This video manager has information indicating a volume menu which is a menu for setting / changing the reproduction control of the entire volume.

The “video title set” includes a plurality of VOs.
B and information for their reproduction control are recorded, and have a size of an integral multiple (2048 × n) of the logical block.
Here, for example, when there are three versions of the same movie, such as an uncut version, a theater release version, and a television broadcast version, the title set is a generic name of three titles for each version.
In this case, since VOBs can be shared between titles having different versions, the video title set includes
The VOB of the shared portion and the VOB for each version are recorded. The size of one VOB is one scene of a movie, one movie, one song of karaoke, or determined by the producer. <Data Structure of Video Title Set> FIG. 7 shows the internal structure of the video title set in FIG. As shown in the figure, the video title set includes video title set management information and a VOB set.

The "VOB set" includes a plurality of VOBs. In each VOB, as shown in FIG. 4, a plurality of audio data, a plurality of sub-picture data, and management information are interleaved together with the video data. “Video title set management information” includes a video title set management table, title search pointer management information, a program chain information table, and the like.

"Video title set management table"
Indicates the internal structure of the video title set management information, that is, the table of contents (what information and tables exist).
The “program chain information table” is a table in which a plurality of pieces of program chain information are recorded. The program chain information of each entry includes information indicating one program chain, that is, path information indicating a reproduction order of a plurality of VOBs and control information regarding reproduction. Here, the program chain (hereinafter abbreviated as PGC) is a VOB that is determined in the above-described reproduction order and is reproduced in a series. Therefore, the title creator can set an arbitrary number of VOBs in an arbitrary order to form one PGC by setting the path information.

Each PGC information further records a reproduction time, a pre-processing command, a post-processing command, and path information.
"Reproduction time" indicates the reproduction time of the PGC. “Pre-processing command” indicates a control command to be executed before the start of PGC reproduction.

The "post-processing command" indicates a control command to be executed after the end of PGC reproduction. The pre-processing command and the post-processing command include a reproduction branch control instruction and a reproduction output control instruction. As an example of the former,
Next, a LINK command for designating a PGC to be reproduced. As an example of the latter, an SE for designating which combination of a plurality of audio data and a plurality of sub-picture data in a VOB is to be reproduced.
There is a TSTN instruction and the like.

The "path information" indicates the reproduction order of a plurality of VOBs constituting the PGC, and includes a pointer string indicating a logical address of a storage area on the optical disk of each VOB as shown by an arrow in FIG. The column of pointers indicates the reproduction order of the individual VOBs constituting the PGC. For example, FIG.
As shown in the figure, the route information of the PGC information # 1 is
Includes pointers that point to # 1, # 2, and # 3. According to this PGC information # 1, VOB # 1 is reproduced first, and then VOB # 1 is reproduced.
B # 2 is reproduced, and finally VOB # 3 is reproduced. Further, the path information includes, for each VOB pointed by the pointer, a VOB attribute indicating whether or not the VOB is an element of a multi-angle block. Here, the multi-angle block refers to a plurality of VOBs having moving image data viewed from different viewpoint positions (or lines of sight).

"Title search pointer management information"
This is a table of contents of video titles in the present video title set, and indicates, for each video title included in the present video title set, a PGC belonging to the video title and a PGC to be reproduced first at the start of reproduction in the video title. Hereinafter, the details of the route information in the PGC information will be further described.

The route information in PGC information # 1 (route information #
FIG. 8 shows a more detailed example of the data configuration of (1). FIG. 9 shows a path table # 1 of the path information # 1 of the PGC information # 1. As shown in the figure, in the path information # 1, VOB information # 1 to VOB information # 3 indicating VOBs which are elements of the PGC # 1 are arranged in the order of reproduction. One piece of VOB information includes a pointer indicating a storage area of the VOB, and the VOB attribute represented by a block type and a block mode. The block type indicates whether the VOB is an element of a multi-angle block (angle or non-angle). The block mode indicates the range of the VOB in the multi-angle block when the block type is angle. In other words,
It indicates which of the plurality of VOB information in the path information from which VOB information to which VOB information is a multi-angle block. More specifically, it indicates whether the position in the block in the path information is the first position, the middle position, or the last position.

The route information # 1 shown in FIG. 9 is an example of a normal (non-angled) PGC. According to this route information # 1, as shown in FIG. 11, VOBs # 1, # 2, # 3
Are reproduced in series, one PGC # 1 is reproduced. FIG. 10 shows an example of path information (referred to as # 2) including a multi-angle block. FIG. 12 also illustrates PGC # 2 based on the route information # 2. In the route information # 2 of FIG.
Elements of # 2 are VOBs # 4 to # 8. Of these, VOB
# 5, # 6, and # 7 have a block type of angle and block modes of head, middle, and end, respectively, and thus form a multi-angle block as shown in FIG. In this case, PGC # 2 is VOB # 4, #
Rather than being played back in series in the order of # 5, # 6, # 7 and # 8, VOB # 4 is played back first under control of the playback device, and then one VOB is selected in the multi-angle block. In addition, the reproduction is performed while being switched according to the user's remote control operation, and finally, VOB # 8 is reproduced.
At this time, the VOB whose reproduction is to be started first in the section of the multi-angle block (that is, the default angle)
Is the first VOB in the block mode. In the example of FIG. 10, the VOB reproduced next to VOB # 4 has the block mode at the head, that is, VOB # 5. <Data Structure of Video Manager> FIG. 13 shows the internal structure of the video manager in FIG. As shown in the figure, the video manager includes video manager management information and a VOB set. The video manager management information includes a video manager management table, title search pointer management information, volume menu management information, a PGC information table, and the like.

This data structure is different from the structure of the video title set shown in FIG. 7 in that volume menu management information is added, and the automatic reproduction branch information, pause reproduction information, and menu selection information are included in the PGC information. Is not included. However, the data structures of FIG. 13 and FIG. 7 are completely the same, and only items that are not actually required are omitted. Hereinafter, the different points will be mainly described.

The "video manager management table" indicates the internal structure of the video manager management information, that is, the table of contents (what information and tables exist). “Title search pointer management information” is a table of contents of video titles in the volume, and indicates, for each video title, the video title set to which it belongs.

The "volume menu management information" includes access information which is a pointer to PGC information for a volume menu. Here, the volume menu (hereinafter, also referred to as a whole menu) is a menu for setting / changing the reproduction control of the whole volume, and the "menu" key of the remote control is pressed at any time during the disk reproduction. Means the menu displayed by
In the case of a karaoke disc, this is a menu for selecting a title (a song in this case) in the volume. Data representing the menu itself is recorded as one or more PGCs. The volume menu management information is stored, for example, in a buffer in the playback device at the start of playback, and is referred to by the playback device when the “menu” key on the remote control is pressed during playback. As a result, the volume menu is reproduced and displayed according to the accessed access information. The "menu PGC information table" is a table in which one or more PGC information for a menu is recorded. As indicated by the arrow in the figure, the designation is made by the access information included in the volume menu management information. Since the volume menu itself is represented by a plurality of PGCs specified in this table, an arbitrary form of menu may be configured, whether it is a hierarchical menu or a menu including voice guidance. Is possible. <Data Structure of Management Information in VOB> FIG. 14 shows a structure of each management information interleaved in the VOB of FIG. As shown in the figure, the management information includes trick play information, highlight information, and general information.

"Trick play information" is information for trick play such as jump destination information such as fast forward playback and rewind playback. “Highlight information” indicates menu display information using sub-picture data and information instructing playback control corresponding to menu selection by remote control key operation. Specifically, the number of selection items, color information, It consists of a plurality of selection items, and the selection items consist of item display information and a highlight command. In order to realize an interactive process with the user, an inquiry by displaying an item image by sub-picture data and a response by a selection operation by a remote controller are performed. Information. Since this highlight information exists for each VOBU in FIG. 4, it is possible to realize interactive processing at an arbitrary reproduction point in the VOB.

The "number of selected items" indicates the number of items that can be selected by a user operation on the menu display. The menu display here is, for example, the display of an item image such as a selection button or a selection icon using sub-video data.
“Color information” is information for instructing a color change to indicate the selection and confirmation when an item is selected by a user operation and when the selected item is confirmed.

The plurality of “selection items” are information representing the same number of items in the menu as the number of selection items. In this embodiment,
The selection items include a plurality of items indicating a combination of audio data and sub-picture data, so that the user can freely select. The “item display information” of each selection item indicates a range in which the color of the sub-image is changed when the item is selected. For example, if a button or icon indicating an item is rectangular, it is represented by the coordinates of two diagonal vertices.

The "highlight command" of each selection item is
The reproduction control command to be executed when the corresponding item is selected and confirmed is shown. A specific example of the command is LI
There are an NK instruction, a SETSTN instruction, and the like. The LINK instruction is described as “LINK PGC # n” and PGC # n
To jump to. #N represents the number of the PGC information in the PGC information tables shown in FIGS. 7 and 13. According to this command, the playback device allows the currently playing PG
C is canceled and the designated PGC information #n
, And the reproduction of PGC # n is started accordingly. The SETSTN instruction is “SETSTN #i, #
j ", and instructs reproduction in a combination of audio data #i and sub-picture data #j. #I, #j
Represents the number of audio data and the number of sub-picture data in the VOB. With this command, the playback device switches the audio data being reproduced and the sub-picture data to the designated audio data #i and sub-picture data #j in the PGC currently being reproduced. Further, the SETSTN instruction includes “SETSTN #i, #
The angle number in the multi-angle block may be designated by the third parameter #k such as “j, #k”.

These commands are common to the pre-processing command, post-processing command, and highlight command already described. As a guide for using these commands properly, a pre-processing command is mainly used for initial setting of a combination of audio data and sub-picture data in PGC reproduction, a highlight command is used for changing settings according to a user operation, and a post-processing command is mainly used for an optical disc. It is desirable to use it for the entire default setting or for resetting the setting contents. It is also possible to use other plural commands, but they are not related to the present invention, so that the description is omitted.

The "general information" records information such as a reproduction function supported by data in the GOP, and includes multi-angle information as one of the reproduction functions. The multi-angle information is information for recording moving images viewed from different viewpoint positions in a plurality of VOBs, and switching to an angle desired by an operator during reproduction. Specifically, when there are n VOBs corresponding to angles # 1 to #n, the multi-angle information includes n jump addresses (logical block addresses) corresponding to the angle numbers. Each jump address is a jump address to another angle, and includes a VOB including the multi-angle information.
And the playback position of the video data at approximately the same time.

FIG. 15 is an explanatory diagram of multi-angle reproduction controlled by the multi-angle information. 12, VOB # 4 to VOB # 8 correspond to POB shown in FIG.
VOBs in GC # 2P, VOB # 5 to VOB # 7
Is a multi-angle block. VOB # of this section
5 to VOB # 7 are switched at the time of reproduction according to the multi-angle information. This allows the user to switch between moving images viewed from different viewpoints. The enlarged view at the bottom of the figure is an explanatory diagram showing how the viewpoint position is switched based on the multi-angle information. In the multi-angle information, a jump address to a reproduction position (VOBU) at the same time in a VOB of a different angle is recorded. For example, the multi-angle information of VOB # 5 includes jump destination information to VOB # 6,
Destination information for VOB # 7 is recorded. VOB
The same applies to # 6 and VOB # 7. The user instructs angle switching by pressing the “ANGLE” key on the remote controller 91. When angle switching is instructed,
Playback is started from jump destination information corresponding to the angle specified by the playback device.

This concludes the description of the data structure recorded on the disc of this embodiment, and then describes an optical disc reproducing apparatus having the above data structure. <Appearance of Reproducing System> FIG. 16 is an external view of a reproducing system including a reproducing apparatus, a monitor, and a remote controller according to the present embodiment.

As shown in FIG.
3 reproduces the DVD shown in FIG. 3 in accordance with the operation instruction from 1 and outputs a video signal and an audio signal. An operation instruction from the remote control 91 is received by the remote control receiving unit 92 of the playback device 1. The display monitor 2 receives a video signal and an audio signal from the playback device, and performs video display and audio output. This display monitor may be a general television. <Overall Configuration of Reproducing Apparatus> FIG. 17 is a block diagram showing the overall configuration of the reproducing apparatus in the present embodiment. This reproducing apparatus includes a motor 81, an optical pickup 82, a mechanism control unit 8
3, a signal processing section 84, an AV decoder section 85, a system decoder 86, a remote controller 91, a remote controller receiving section 92, and a system control section 93. Further, the system decoder 86 includes a video decoder 87, a sub-picture decoder 88,
It comprises an audio decoder 89 and a video synthesizing section 90.

The mechanism control unit 83 controls a mechanism system including a motor 81 for driving the disk and an optical pickup 82 for reading signals recorded on the disk. In particular,
The mechanism control unit 83 adjusts the motor speed according to the track position instructed by the system control unit 93, and at the same time, controls the actuator of the optical pickup 82 to move the pickup position, and detects an accurate track by servo control. Then, rotation waiting is performed until a desired physical sector is recorded, and signals are continuously read from a desired position.

The signal processing unit 84 amplifies, waveform-shapes, binarizes, demodulates, and amplifies the signal read from the optical pickup 82.
After processing such as error correction, the data is stored in a buffer memory (not shown) in the system control unit 93 in units of logical blocks. The data in the buffer memory is read by the system control unit 93 for the video title set management information and the video manager management information, and is transferred from the buffer memory to the system decoder 86 under the control of the system control unit 93 for the VOB.

The AV decoder 85 outputs the signal-processed V
OB is converted into an original video signal or audio signal. The system decoder 86 determines a stream ID and a sub-stream ID for each packet included in the VOB transferred from the buffer memory, and outputs video data to the video decoder 87 and audio data to the audio decoder 89.
Then, the sub video data is output to the sub video decoder 88, and the management information is output to the system control unit 93. At this time, the system decoder 86 outputs the audio data and the sub-video data of the number designated by the system control unit 93 among the plurality of audio data and the plurality of sub-video data to the audio decoder 89 and the sub-video decoder 88, respectively. , Discard data other than that number. The management information output to the system control unit 93 is stored in a buffer different from the above buffer memory. This buffer is updated each time new management information is output.

The video decoder 87 decodes and decompresses the video data input from the system decoder 86 and outputs it to the video synthesizing section 90 as a digital video signal. When the sub-picture data input from the system decoder 86 is run-length compressed image data, the sub-picture decoder 88 decodes and decompresses the data, and outputs the decoded data to the picture synthesizing section 90 in the same format as the video signal. . At this time, the color information can change the color inside the image data. Further, the sub-picture decoder 88 includes a graphics processing unit therein. When the sub-picture data includes a program for instructing graphics processing and target data, the graphics processing unit Output the processed data. As a result, it is possible to create a video effect that has not existed conventionally.

The audio decoder 89 decodes and decompresses the audio data input from the system decoder 86 and outputs it as a digital audio signal. The video synthesizing section 90 outputs a video signal obtained by mixing the output of the video decoder 87 and the output of the sub-video decoder 88 at a ratio specified by the system control section 93. This signal is converted into an analog signal and then input to a display device.

The remote controller 91 receives a reproduction control instruction from a user operation. FIG. 18 shows an example of the key arrangement of the remote controller 91. Here, only the keys related to the present invention will be briefly described. The "menu" key is for calling up an entire menu displayed at any time during disc playback. The “ten” key and the “direction” key are for selecting a menu item. The "enter" key is used to confirm the selected item. The “angle” key is for switching angles during multi-angle playback.

The remote control receiver 92 receives a key signal transmitted by infrared rays when a key of the remote controller 91 is pressed, and notifies the system controller 93 of key data by interruption. The system control unit 93 includes a program memory that stores a program that realizes a function as a system control unit, a buffer memory that stores data of a logical block, and a CPU that executes the program, and controls the entire playback device. Do. More specifically, data is read from the buffer memory, and if the read data is video title set management information or video manager management information, another buffer memory (not shown, hereinafter, referred to as a first buffer). ), And controls the reproduction of the signal processing unit 84 based on the contents.
In the case of B, the data is directly transferred from the buffer memory to the system decoder 86. The mechanism control unit 83 calculates which track position on the disk corresponds to the logical block to be read next, specifies the track position, and instructs the mechanism control unit 83 to perform logical block read control.
In addition, key data corresponding to the pressed key is notified by an interrupt from the remote control receiving unit 92, and reproduction control is performed according to the key data. Also, the system decoder 86
, The management information in the VOBU is temporarily stored in another buffer memory (hereinafter, referred to as a second buffer), and the reproduction control is performed based on the content. <Structure of System Decoder> FIG. 19 is a block diagram showing a structure of system decoder 86 in FIG.
As shown in the figure, the system decoder 86 includes an MPEG decoder 120, a sub-picture / audio separation unit 121, a sub-picture selection unit 122, and an audio selection unit 123.

The MPEG decoder 120 determines the type of packet for each data pack included in the VOB transferred from the buffer memory by referring to the stream ID in the packet header. If it is a private packet 1, the packet data is output to the sub-picture / audio separation unit 121, if it is a private packet 2, it is output to the system control unit 93, and if it is an MPEG audio packet, it is output to the audio selection unit 123.

The sub-picture / audio separation unit 121
For the private packet 1 input from the EG decoder 120, the type of the packet is determined with reference to the sub-stream ID.
22, if it is audio data, the audio selection unit 1
23, and outputs the data. As a result, the sub-picture data of all numbers and all the audio data are output to the sub-picture selecting unit 122 and the audio selecting unit 123.

The sub-picture selecting section 122 outputs to the sub-picture decoder 88 only the sub-picture data of the number designated by the system control section 93 among the sub-picture data from the sub-picture / audio separating section 121. Sub-picture data other than the designated number is discarded. The audio selection unit 123
Of the MPEG audio from the EG decoder 120 and the audio data from the sub-picture / audio separation unit 121, only the audio data with the number specified by the system control unit 93 is output to the audio decoder 89. Audio data other than the designated number is discarded. <Detailed Configuration of System Control Unit> FIG. 20 is a functional block diagram showing a more detailed configuration example of the system control unit 93 in the embodiment.

The system control unit 93 includes a buffer memory 931, a first buffer 932, a second buffer 933,
It comprises a remote control input interpretation unit 934, a button control unit 935, a command interpretation unit 936, a system state management unit 937, and a playback control unit 938. The buffer memory 931 is
The data read from the optical disk via the signal processing unit 84 is temporarily stored in logical block units. 86 and V
When it is other than OB, that is, when the video title set management information and the video manager management information are being read, the held contents are output to the first buffer 932.

The first buffer 932 holds video title set management information and video manager management information.
This capacity is sufficient if at least one piece of PGC information can be held. The second buffer 933 holds management information in the VOBU output from the system decoder 86. This held content is overwritten every time the management information in the sequentially read VOBU is output. Therefore, this capacity may be one management information, that is, 2 kB. The buffer memory 931, the first buffer 932, and the second buffer 933 may actually be different areas in one memory, and are separately treated functionally in FIG. 20.

The remote control input interpreting section 934 receives key data from the remote control receiving section 92, interprets which button has been pressed, and determines the type of the button.
Notify 35. The button control unit 935 includes the management information stored in the second buffer 933 and the remote control input interpretation unit 9
Based on the button notification from the control unit 34, it controls whether or not to execute the highlight command and whether to color or reflect the image. More specifically, (1) when a cursor key or a numeric key is pressed is notified as a button notification, the selection color is displayed on the display portion of the selection item to the AV decoder unit 85 in accordance with the management information. Give instructions. This coloring instruction is issued in accordance with the color information shown in FIG. 14 and the item display information for each selection item. (2) When the enter key is notified, an instruction is given to color the display area of the selected item with a confirmed color, and if a highlight command is set for the selected item, the highlight is set. The write command is notified to the command interpretation unit 936. (3) When the menu key is pressed, the command interpreting unit 936 is notified of a volume menu playback command. (4) When the press of the angle key is notified, the command interpreting unit 936 is instructed to switch the angle. When the title key is notified, a reproduction command of the title menu is notified. Other buttons are not directly related to the present invention and will not be described.

The command interpreting section 936 includes the button control section 9
Upon receiving a highlight command, a volume menu playback command, a title menu playback command, and an angle switching command from 35, these are interpreted and executed. More specifically, if the interpretation result indicates that the highlight command is “SETSTN #i, #j”, the command interpretation unit 936 stores the audio number #i and the sub-picture data number #j in the system state management unit 937. Write to a specific register. Since the value of the specific register is directly notified to the system decoder 86, the value is immediately switched so as to reproduce the combination of the audio number #i and the sub-picture data number #j. Also, as a result of the interpretation, the highlight command is "LINK P
If “GC # n”, the playback control unit 938 sends the PGC information #
n is read out. As a result of the interpretation, if the instruction is an angle switching instruction, since the angle number is held in the specific register, the angle number is updated, and the reproduction control unit 938 jumps to another angle having the updated angle number. Instruct the address to read another angle. The same applies to the case where an angle number is specified by the SETSTN instruction.

The system state management section 937 has a register group including the above-mentioned specific register, and stores the internal state of the playback device. The specific register holds the audio number #i and the sub-picture data number #j as described above,
The held content is directly output to the audio selection unit 123 and the sub-picture selection unit 122 in the system decoder 86, and the angle number is held during multi-angle block playback.

The reproduction control section 938 includes a first buffer 932
By controlling the mechanism control unit 83 and the signal processing unit 84 according to the video title set management information and the video manager management information held in the optical disk, the overall reading of the optical disk is controlled. For example, as the post-processing command held in the first buffer 932 or the command interpretation unit 936
When "LINK PGC #n" is received as an instruction from, reading of PGC information #n is newly controlled.
In addition, the reproduction control unit 938 performs control to read a series of VOBs in accordance with the path information in the first buffer. In the read control of a series of VOBs, as shown in FIG. 8, when the VOB to be reproduced next belongs to a multi-angle block (when the block type of the VOB attribute is "angle"), the following is performed. To perform reading. If the block type is “angle” and the block mode is “head” and the angle number is held in a specific register in advance, the reproduction control unit 938 determines that the angle in the multi-angle block The VOB of the number is read. At this time, when the angle number is not held in the specific register in advance (for example, when the angle number is 0), the block mode reads the first VOB. In addition, the playback control unit 938
If the block mode is “intermediate” or “final”, one VOB in the multi-angle block has been reproduced, and the VOB information following the VOB information with the block mode of “final” follows. Therefore, in the example of FIG.
4, VOB # 5, and VOB # 8 are reproduced in this order. <Schematic Processing of System Control Unit> FIG. 21 is a flowchart showing the processing contents of the system control unit 93 in FIG.

First, when the system control section 93 detects that the disc has been set in the reproducing apparatus, the system control section 93 controls the mechanism control section 83 and the signal processing section 84 to control the disc rotation control until stable reading is performed. When the operation becomes stable, the optical pickup is moved to read the volume management area shown in FIG. 6, and the video manager shown in FIG. 7 is read based on the information of the volume management area (steps 121 and 122). Further, the system control unit 93 reproduces the PGC for the volume menu according to the volume menu management information in the video manager (step 123). This volume menu PG
At the time of reproduction of C, the user can specify desired audio data and sub-picture data numbers. The reproduction of the volume menu PGC at the start of the reproduction of the optical disk may be omitted if it is not necessary according to the purpose of the multimedia data.

Next, the system control section 93 displays the title menu PGC in accordance with the title search pointer management information in the video manager (step 12).
4) Based on the user's selection (step 125), read out the video title set management information in the video title set including the selected title (step 1).
26), branch to the PGC at the head of the title (step 127). Further, the PGC group is reproduced, and when the reproduction is completed, the process returns to step 124 (step 128). <Reproduction Process of System Control Unit> FIG. 22 is a detailed flowchart of the reproduction process of the PGC group by the system control unit 93. This processing corresponds to steps 123 and 12 in FIG.
4 and 128.

In FIG. 22, first, the system control unit 9
3 is the P of the video manager or video title set
The corresponding PGC information is read from the GC information table (step 131), and a preprocessing command is executed (step 132). If the command is a SETSTN instruction, the sub-picture data and audio data numbers #i and #j specified in the command are transmitted to the system decoder 86.
An instruction is given to the audio selection unit 123 and the sub-video selection unit 122 in the middle. If an angle number is also specified in the SETSTN instruction, the angle number is set in the specific register as an initial setting.

Next, the system control unit 93 reads the VOBs in the order of the pointers described in the path information shown in FIGS. 7 and 13 by controlling the mechanism control unit 83 and the signal processing unit 84 (step 133). . The read VOB is separated and reproduced by the AV decoder unit 85. At this time, the separated video and sub-picture are displayed on a display screen (not shown), and audio output based on audio data is started. Thereafter, the system control unit 93 receives the management information separated by the AV decoder unit 85 (step 134), decodes the general information and the trick play information in the management information shown in FIG. 14, and follows the decoding result. Control is performed (step 135).

Further, the system control section 93 decodes the highlight information in the management information (step 136),
When key data corresponding to a cursor key or a numeric keypad is received from the remote control receiving unit 92, the item selected on the display screen and the selected color are changed (steps 137, 137).
38) When the key data corresponding to the enter key is received, the color of the item selected on the display screen is changed to a confirmed color (steps 139 and 140), and a command corresponding to the confirmed item is executed. (Step 14
1). The processing of this command is the same as the above-mentioned pre-processing command.

Next, when there is a VOB to be reproduced next, the system control unit 93 returns to step 133 (step 142: no), and when there is no VOB to be reproduced next (when PGC ends). (Step 142: y
es), the PGC of the branch destination is determined (step 142),
The post-processing command is executed (Step 143). The execution of this post-processing command is the same as the above-mentioned pre-processing command. If the branch destination is the title menu, the process returns to step 124 shown in FIG. 21 (step 14).
4: no), otherwise return to step 131 (step 144: yes). <Volume menu display processing of system control unit> FIG.
3 is a flowchart showing a volume menu display reproduction process by the system control unit 93 when the “menu” key of the remote control is pressed.

The system control unit 93 executes the processing shown in FIG. 11 in the interrupt processing by pressing the “menu” key.
After the interruption, the system control unit 93 saves the PGC number being reproduced at that time and the logical block address indicating the current reproduction position of the VOB in the memory (step 145), and reads out the video manager (step 14).
6). This reading of the video manager may be performed from the optical disk in the same manner as in step 122 of FIG. 21, or may be stored in the memory at the time of reading in step 122 and read.

Further, the system control section 93 reproduces the PGC group for the volume menu based on the video manager (step 147). The reproduction of the PGC group is the same as the processing in FIG. By playing back this volume menu, the user can select a combination of sub-picture data and audio data.
For example, if the command corresponding to the selected item is "SET
STN # 2, # 3 ", the system control unit 93 converts the selected audio data # 2 and sub-picture data # 3 into the audio selection unit 123 and the sub-picture selection unit 122.
Instruct each.

After the reproduction of the volume menu PGC is completed, the system control unit 93 sets the saved PGC number,
The logical block address indicating the original playback position of the VOB is restored from the memory (step 148), and the process exits from the interrupt processing (step 149). Thereby, the original PG
Reproduction from the reproduction position of the VOB in C resumes. At this time, the sub-picture data and audio data to be reproduced have been switched to numbers desired by the user according to the SETSTN instruction.

The operation of the reproducing apparatus configured as described above will be described. First, a brief description will be given of a read / reproduce operation of a disk, which is the basis of five operation examples described later. When the disc is set in the playback device, the disc rotation control is performed until stable reading is performed,
When it becomes stable, the optical pickup is moved and the volume management block shown in FIG. 7 is read. The file information inside the file block is recorded in the volume management block, and the video manager shown in FIG. 7 is read based on the information. In this operation example, it is assumed that a karaoke disk is reproduced. In this disc, the volume menu is a karaoke title (in this case, a song) selection menu. If the selected song is a duet song, it is assumed that a duet part selection menu as shown in FIG. 26 is prepared as a title menu.

At the start of reproduction of the title selected by the volume menu, as shown in FIG. 13, the title search pointer management information recorded at the head of the video title set including the title is read. further,
If the title is a duet song, the title search pointer management information records the number of the PGC corresponding to the title menu for selecting a duet part recorded inside the video title set.
The PGC of the title is read and playback control is performed. This reproduction control is performed according to the PGC information shown in FIG.

The volume menu P to be reproduced here
FIG. 24 shows an example of GC. The PGC in the figure is used for selecting a menu of the title “Karaoke for duet”, and the PG
C is composed of one VOB # J. This VOB
The videos 300 to 350 in the middle are MPEG still images and represent background images of menus. Sub-picture data (SP in the figure) 30
0 to 350 are 2 as selection items to be superimposed on the background image.
It represents a color character image and is colored according to the color information of the highlight information in the management information 300 to 350. The audios 300 to 305 and 310 to 315 represent guidance voices for prompting selection. The LINK commands corresponding to the selected items are recorded in the highlight commands # 1 to # 3 in the management information. The video data and the sub-video data are combined and output by the playback device during playback.

After the user listens to the reproduced menu display and guidance voice, the user operates the remote controller 91 to set “2”.
Is pressed, the operation information of the remote controller 91 is notified from the remote controller receiving unit 92 to the system control unit 93. The system control unit 93 performs processing corresponding to the button “2”, that is, the command “LINK” corresponding to the button “2” in the highlight information in the control data of the VOB.
PGC # 11 ”is interpreted, PGC information # 11 is read, and reproduction of PGC # 11 is started in the same manner as described above.

Next, the data recorded on the disc is
(1) In the case of a karaoke disk, (2) in the case of English conversation teaching material, (3) in the case of a quiz, (4) in the case of a golf game, and (5) in the case of a baseball broadcast, each operation example will be described. I do.

(1) Operation for Karaoke Disk FIG. 25 shows a karaoke playback VOB used in this operation example.
(Referred to as VOB # K). This VOB # K is composed of three different sub-picture data (SP) # 1 to # 3 and audio # 1 to one video 400 to 500 each representing a background image.
# 3 are interleaved. In the sub-picture data, the male part is shown in blue and the female part is shown in red, but when the singing voice of the lyrics is recorded in the audio data in advance, they are distinguished in white. Originally, the color changes in accordance with the reproduction of the song, but here, for simplicity, the color change with time is not considered. In the audio data in the figure,
Indicates that only the accompaniment of the male part and the female part are recorded.

The following describes the procedure and operation for playing back a karaoke disk containing such a VOB # K. First, when the disc is set in the playback device and playback is started, the video manager shown in FIG.
A playback mode common to the entire volume is set based on the volume menu management information. Specifically, the volume menu PGC indicated by the volume menu management information is reproduced. In this volume menu, a title selection menu as shown in FIG. 24 described above is reproduced. Further, when a title for duet is selected in the title selection menu, a title menu for part selection for duet music is reproduced.

FIG. 26 shows a karaoke part selection VOB included in the part selection title menu PGC.
(VOB # L). Since the structure is the same as that of the title selection volume menu (VOB # K) shown in FIG. 24, the description of the same points will be omitted and different points will be mainly described. The difference is the content of the management information. In the management information of this VOB # L, a "SETSTN # i, #j" command is recorded in the highlight information shown in FIG. Selection items # 1 to # 3 are selected corresponding to buttons "1" to "3" of remote controller 91. As a result, when the “2” female part is selected with the remote control 91 button,
The playback control command “SETSTN # 3, # 3” is executed, and the audio data,
Switching of the sub-picture is instructed. Since the reproduction of the music shown in FIG. 25 starts after this instruction is issued, appropriate audio and sub-picture are output.

If a problem is caused by the immediate execution of the command, the system control unit 93 can provide an appropriate delay. The command is not only for the playback part of the disc menu, but also for all P
Since it can be set in the GC, it can be set according to the application. In the above example, the karaoke playback is started after the combination of the audio and the sub-picture data is selected during the volume menu playback. And sub-picture data can be changed. In this case, the same highlight information as the highlight information shown in FIG. 14 may be recorded in all the management information in the karaoke reproduction VOB # K of FIG. The same highlight information can be recorded only for menu VOB # L and karaoke VOB # L.
This is because OB # K also has the same data structure. By doing so, during playback of the karaoke, the corresponding SETST is pressed in response to pressing of any one of the buttons “1” to “3” on the remote control.
N instructions are executed. Thus, it is possible to immediately switch to the audio and sub-picture data desired by the user without stopping the progress of the karaoke reproduction.

As in this operation example, in the optical disk and the reproducing apparatus of the present embodiment, even if the user does not know the numbers of the audio data and the sub-picture data in advance, appropriate audio data and sub-picture data can be exchanged according to the menu. Can be easily selected. In addition, audio data and sub-picture data can be easily switched after the start of reproduction.

Further, in the karaoke example described above, separate VOBs having different background moving image data may be provided as multi-angle blocks. By doing so, it is possible to enjoy reproduction by various combinations of moving picture data, audio data, and sub-picture data by the SETISTN command. (2) Operation in the case of English conversation teaching material In the first operation example, an example in which a command is issued by a menu has been described. An example will be described in which the images are sequentially reproduced by a combination of the sub video and the sub video.

Usually, in English conversation teaching material videos, the same conversation example is reproduced many times, but as the learning progresses, the contents of the audio and subtitles change. (Conventionally, as described in the example of the video CD, all changing patterns had to be recorded as separate VOBs, so that there was a problem that video data having a large data amount was recorded in duplicate.) The operation example shows that the part of the conversation example that is repeated by using the post-processing command of the caller's PGC can be shared by the same stream. FIG. 27 shows an example in which the same VOB (VOB # M) is used to reproduce three times with different combinations of audio data and sub-picture data. In the figure, three PGCs # 1 to # 3 have the same VOB #M designated in the path information. As shown in FIG. 13, a pre-processing command and a post-processing command can be recorded in the PGC. First, in the reproduction of PGC1 # 1, the pre-processing command "SETSTN # 1, # 1" is executed, and the audio # 1 and the sub-picture # 1 together with the main picture are executed.
Is played. When the reproduction of PGC1 ends, PGC #
1, the post-processing commands “SETSTN # 2, # 2” and “LINK PGC # 2” are executed, and the operation shifts to the reproduction of PGC # 2. In the playback of the PGC # 22, the audio # 2 and the sub-picture # 2 are played back together with the main video based on the previous setting, and when the playback ends, the post-processing command "SETSTTN
# 3, # 3 "and" LINK PGC # 3 "are executed. PGC # 3 is reproduced in this state, and when the reproduction is completed, the post-processing command “SETSTTN”
By executing “# 1, # 1”, the setting returns to the original setting (default) of audio # 11 and sub-picture # 1.

As described above, by using the same VOB # M and preparing PGCs with different designations of the pre-processing command and the post-processing command, various reproductions are automatically realized. Although three PGCs are used in this example, the PGC information has a size negligibly small compared to the amount of VOBs, so that recording efficiency is improved and effective reproduction can be performed using one VOB. .

(3) Operation in the case of a quiz In the case of a quiz, the user often enjoys setting the hint level even for the same problem. The VOB that realizes this includes video data serving as a hint, a plurality of audio data representing an explanatory sound serving as a hint to solve a quiz, and a plurality of sub-pictures having different positions and areas at different masking positions for a moving image serving as a hint. The data is interleaved according to each level. Then, for each question, the content of the explanation voice that is a hint to solve the quiz is changed according to the level set in the dialogue menu with the user, and the position and area of the masking of the moving image that is the hint are switched by the sub-video. .

As can be seen from this operation example, the possibility of realizing new multimedia software such as a quiz such as a game feeling mainly for moving images required for expanding the use of DVDs is increased. (4) Operation in the Case of a Golf Game An operation example in which effective sub-video data is generated when the sub-video data includes a program for performing graphic data and graphics processing will be described. This golf game has a function of displaying a putting line when putting on a green.

[0092] In the VOB used in this example, the video data is moving image data that moves on an undulating green. The sub-picture data includes data representing a green three-dimensional shape, data indicating a cup position, a program for calculating and displaying a putting line, and viewpoint position data corresponding to video data. The last three are VO
B, and is recorded at the beginning of
Is set to the graphics processing unit in the. The viewpoint position data corresponding to the remaining video data is data representing the instantaneous viewpoint position of the moving image data moving on the green, and is recorded in the VOB corresponding to the video data.

The above putting line program is as follows:
It has a function to move the ball mark display in accordance with the cursor key operated by the user, and when the ball mark display is adjusted to an arbitrary putting position, the cup is then changed according to the undulation represented by the three-dimensional shape data according to the enter key. Display lines up to. Thus, a user who wants to know the putting line can see the line from the ball mark display position to the cup only by adjusting the ball mark display to an arbitrary putting position.
In addition, it is possible to reproduce a video with a sense of realism and three-dimensionality that cannot be obtained with a conventional TV.

(5) Example of Operation for Baseball Relay Here, an example will be described in which the switching of audio data and sub-picture data is dynamically changed in accordance with the switching of the angle in the VOB in a multi-angle section. The multi-angle section is composed of VOBs 1 to 3 having video data viewed from three viewpoint positions from (1) behind the back net, (2) first base side, and (3) third base side in baseball broadcasting. In this case, V
OB1 is composed of video data 1 representing a moving image viewed from behind the backnet, and audio data # 1-1 representing common audio. VOB2 includes video data 2 representing a moving image viewed from the first base and audio data # 2- representing common audio.
1 and audio data # 2-2 representing the voice of the first base. VOB3 is composed of video data 3 representing a moving image viewed from the third base and audio data # 3- representing common sound.
1 and audio data # 3-2 representing the voice of the third base. Audio data # 1 representing the above common voice
-1, # 2-1, and # 3-1 are all the same.
The audio data # 2-2 and # 3-2 are individual sounds corresponding to angles. In the above multi-angle section, the user can select an appropriate audio when the angle is switched.

For example, when the back side of the back net is selected as an angle, a common sound is reproduced. When the first base side is selected as the angle, it is possible to further select whether the common sound or the individual sound is used in the whole menu. The same goes for the third base. Furthermore, for each management information of VOB1-3,
"SETSTN # 1, # 0", "SETSTN
N # 2, # 0 "and" SETSTN # 2, # 0 "are filled and automatically determined and executed as time passes, so that the audio data is automatically switched at the same time as the angle is switched. In this case, the user can, of course, select the common voice by menu selection.

In this manner, simultaneously with the multi-angle switching, it is possible to switch to the audio data / sub-picture data which is more realistic depending on the angle. Hereinafter, a method of manufacturing an optical disc according to an embodiment of the present invention will be briefly described. FIG. 28 is a flowchart showing a method of manufacturing an optical disc according to the present invention. First, FIG.
Is created by the logical data string creation device (step 191). This logical volume data creation device can create volume data having the data structure shown in FIG. 6 by using multimedia data editing software on a personal computer or a workstation. This volume data is recorded on a transmission medium such as a magnetic tape, and is converted into a physical data string by a physical data string creation device (step 192).
This physical data string is obtained by adding data of a lead-in area, data of a lead-out area, and the like to volume data, and then performing an ECC (Error Correction Code) process. In the master disc cutting using this physical data sequence, a master disc of an optical disc is created (step 19).
3). Further, an optical disk is manufactured from the master created by the press device (step 194).

In the above manufacturing flow, the existing CD manufacturing equipment can be used as it is, except for a part of the logical data string creating apparatus relating to the data structure of the present invention. This point is described in Ohm's “Compact Disc Reader” co-authored by Heitaro Nakajima and Hiroshi Ogawa, and in Asakura Shoten “Optical Disc System”, Optical Discourse of the Japan Society of Applied Physics. In addition,
In the first operation example (karaoke example), a step S for designating a combination to be reproduced of audio data and sub-picture data is performed.
The ETSTN command is executed in the title menu for selecting a part immediately before the reproduction of the music is started, but the execution timing is not limited to this. For example, the change of the combination may be realized by providing a button for setting the combination in a volume menu called as needed by a menu key of the remote controller 91.

In this embodiment, image data such as subtitles is used as an embodiment of the sub-picture, but it may be vector graphics or three-dimensional computer graphics (CG). By employing these, it is also possible to realize a game using a combination of a compressed moving image of a real photograph and CG. The present invention shows that the applicability of DVD, a digital video disc, is not just a video disc, but a multimedia disc,
The number of audios and sub-pictures can be as small as several at most for subtitles of movies as video discs or for karaoke lyrics.
Although the number is about 0, it is effective even when several hundreds to several thousand audios and sub-pictures are interleaved.

The audio data may be not only compressed audio but also uncompressed PCM data.
Computer audio such as MIDI may be used.
In the present embodiment, a case has been described in which control data interleaved during a VOB is interleaved for each GOP that is a compression unit. This is because the VOB of the DVD has a variable bit rate and pointers to the next and previous GOPs are required when performing trick play such as fast forward and rewind. It is. However, the unit in which the control data packets are interleaved is not limited to the GOP.

In this embodiment, the description has been given of a DVD read-only disc. However, the same effect can be obtained with a rewritable disc. Further, the concept of the menu is a means for widely requesting the user to make a selection, and is not limited to the selection by the ten keys of the remote controller 91 used in the embodiment. Even if it is a mouse operation or a voice instruction. Although the VOB according to the present invention is based on the MPEG standard, it is sufficient that a plurality of data are interleaved and reproduced in chronological order even if they are expanded in the future or a new standard is used.

Further, the description has been made assuming that the number of compressed moving image data to be interleaved is one, but it is not essentially limited. Furthermore, even if there is no user operation, the command included in the management information may be automatically reproduced at the time of execution. In this way, it is possible to perform the reproduction control at finer intervals.

In this embodiment, a DVD is used as a recording medium. However, a recording capable of storing multimedia data composed of one or more video data, audio data and sub-picture data which can be selectively reproduced. The medium is not limited to this. Further, if the playback device takes out the multimedia data from the outside, the transmission of the multimedia data is not limited to a recording medium, and the multimedia data may be taken out by receiving a digital broadcast wave. In this case, the reproducing apparatus has a configuration including a receiver for receiving a digital broadcast wave instead of the motor 81, the optical pickup 82, the mechanism control unit 83, and the signal processing unit 84 in FIG.

[0103]

According to the recording method of the recording medium of the present invention , the data
And creating the data on a recording medium
Recording, wherein the data is video data
And a plurality of audio data to be selectively played,
Video object including a plurality of sub-picture data to be reproduced
The video object includes a plurality of units.
And each unit includes a predetermined
First partial data, which is data of a section, and the plurality of voices
A plurality of second parts each of which is data of a predetermined section of each data
Minute data and a predetermined section of each of the plurality of sub-picture data.
A plurality of third partial data is data between, belongs Yoo
Control information valid during the reproduction of the first partial data in the unit , said control information comprising: one said second partial data to be reproduced simultaneously with the first partial data in the unit ;
One of the above to be reproduced simultaneously with the first partial data
It is configured to show one or more combinations with the third partial data.

According to this configuration, the control information recorded in the unit is always read out together with the moving image data even during the reproduction of the object, so that the combination of the audio data and the sub-picture data to be reproduced by the reproducing device is performed. Can be dynamically switched. Further, the user can switch to a combination suitable for the content of the title.

Here, the control information is a unit to which the unit belongs.
Is recorded at the beginning.

[0106]

According to this configuration, the control information recorded in the small area is always read together with the moving image data even during the reproduction of the object, so that the reproduction apparatus can reproduce the audio data and the sub-picture data to be reproduced. Combinations can be switched dynamically.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a system stream in which one piece of compressed moving image data and one piece of compressed audio data in the related art are interleaved.

FIG. 2 is an explanatory diagram of a system stream using karaoke data as an example in the related art.

FIG. 3 is a diagram showing a sectional view of a physical structure of a DVD according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram showing how compressed moving image data and compressed audio data form an integrated data string called a video object.

FIG. 5 is an explanatory diagram showing a packed data structure of video data, audio data, sub-picture data, and management information interleaved with a video object in the embodiment.

FIG. 6 schematically shows a data structure of the entire optical disc in the embodiment.

FIG. 7 shows an internal structure of a video title set in the embodiment.

FIG. 8 shows a more detailed data structure of route information.

FIG. 9 is a table in which VOB attributes in the route information are extracted.

FIG. 10 is a table in which VOB attributes indicating multi-angle blocks are extracted.

FIG. 11 is an explanatory diagram showing a relationship between a program chain and a video object.

FIG. 12 is an explanatory diagram showing a relationship between a program chain and a multi-angle block.

FIG. 13 shows an internal configuration of each video manager in the optical disc in the embodiment.

FIG. 14 shows a configuration of each piece of management information interleaved in a VOB in the embodiment.

FIG. 15 is an explanatory diagram of a multi-angle controlled by multi-angle information in the embodiment.

FIG. 16 shows an appearance of a reproduction system in the embodiment.

FIG. 17 is a block diagram showing the overall configuration of the playback device in the embodiment.

FIG. 18 shows an example of a key arrangement of a remote controller in the embodiment.

FIG. 19 is a block diagram showing a configuration of a system decoder in the embodiment.

FIG. 20 is a block diagram illustrating a configuration of a system control unit in the embodiment.

FIG. 21 is a flowchart showing processing contents of a system control unit in the embodiment.

FIG. 22 is a detailed flowchart of a process of reproducing a program chain group by the system control unit in the embodiment.

FIG. 23 is a flowchart illustrating a volume menu display / reproduction process performed by the system control unit when a “menu” key of a remote controller in the embodiment is pressed.

FIG. 24 shows an example of a menu video object in the embodiment.

FIG. 25 is an example of a video object for karaoke reproduction in the embodiment.

FIG. 26 shows the contents of a video object for karaoke part selection included in the volume menu program chain in the embodiment.

FIG. 27 is an explanatory diagram of an operation of effectively using a video object by a pre-processing command and a post-processing command in the embodiment.

FIG. 28 is a flowchart showing a method of manufacturing the optical disc in the embodiment.

[Explanation of symbols]

 Reference Signs List 1 playback device 81 motor 82 optical pickup 83 mechanism control unit 84 signal processing unit 85 AV decoder unit 86 system decoder 86 direct system decoder 87 video decoder 88 sub-video decoder 89 audio decoder 90 video synthesis unit 91 remote control 92 remote control reception unit 93 system control Unit 107 DVD 108 Transparent substrate 109 Information layer 110 Adhesive layer 111 Transparent substrate 112 Printing layer 113 Light beam 114 Light spot 120 MPEG decoder 121 Sub-picture / audio separation unit 122 Sub-picture selection unit 123 Audio selection unit

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nohisa Fukushima 6-14-14 Sekime, Joto-ku, Osaka-shi, Osaka (72) Inventor Katsuhiko Miwa 1-4-4 Nonakaminami, Yodogawa-ku, Osaka, Osaka (56) References JP 5-12804 (JP, A) JP 4-1755081 (JP, A) JP 5-236409 (JP, A) JP 2-210666 (JP, A) JP-A-5-61403 (JP, A) JP-A-59-214389 (JP, A) JP-A-8-314485 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 27 / 00 G11B 20/12 G11B 27/10 H04N 5/91-5/93

Claims (2)

(57) [Claims] 1. A recording method for a recording medium, comprising : a step of creating data; and a step of recording the created data on a recording medium.
The data includes moving image data and a plurality of selectively reproduced data.
Audio data and multiple sub-video data
The video object includes a plurality of units, and each unit includes a first partial data which is data of a predetermined section of the moving image data.
Data of a predetermined section of each of the plurality of audio data.
A plurality of second partial data and data of a predetermined section of each of the plurality of sub-picture data.
A plurality of third partial data, and control information effective during reproduction of the first partial data in the unit to which the third partial data belongs, wherein the control information is to be reproduced simultaneously with the first partial data in the unit. The second partial data and the first
A method of recording on a recording medium, showing one or more combinations with one of the third partial data to be reproduced simultaneously with the partial data
Law . 2. The control information is a head of a unit to which the control unit belongs.
The recording method according to claim 1 , wherein the recording is performed on a portion .