JP2821030B2 - Optical disc reproducing apparatus and reproducing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a reproducing apparatus and a reproducing method for an optical disk on which multimedia data including digital moving image data, audio data, and sub-picture data are recorded, and in particular, dynamically switches the reproduction output. About technology.

BACKGROUND 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.

2. Description of the Related Art In a conventional optical disc, a brief description will be given of a data format in which moving image data and audio data compressed using MPEG form data called a system stream.

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 related art.

In the figure, a "video data sequence" is a serial video data sequence in a compressed stage, which is packetized for every certain number of bytes, and for each number of packets to be interleaved, video 1, 2,. It is expressed as follows.
The “audio data sequence” is packetized for each certain number of bytes after the audio signal including the LR component is compressed, and is expressed for each of a plurality of packets as audio 1, 2,. 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.

A case in which a karaoke disk is produced from a video CD using such a system stream 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 a duet, a system stream in which background video data to which subtitle images of the lyrics of both parts are added and audio with only accompaniment without singing voice are interleaved is required. For the male part, a system stream in which background video data to which the subtitle video of the lyrics of the male part is added and audio including 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, a system stream 1 is for a duet, and video data in which images indicating lyrics of both parts are superimposed on a background video and audio data of only accompaniment are 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.

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

More specifically, in the example of video CD karaoke, for example, while audio data for a female part is being played, the user wants to switch to a duet without stopping the progress of the song, that is, without stopping the playback of the moving image. 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.

Furthermore, 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 picture data. Even during reproduction, audio data to be reproduced together with the moving picture data, sub-picture data, Another object of the present invention is to provide a reproducing apparatus and a reproducing method for an optical disk which enable the combination thereof to be dynamically switched.

Another object of the present invention is to provide a reproducing apparatus and a reproducing method of an optical disk having a data structure for realizing effective reproduction in accordance with the contents of reproduced data.

DISCLOSURE OF THE INVENTION A playback device that achieves the above object is a playback device for an optical disc that includes a data area that stores one or more objects including moving image data, audio data, and sub-picture data, The data area includes a plurality of small areas, and the object is stored over one or more of the small areas, and each of the small areas includes one or more first areas in which data of a predetermined section of the moving image data is stored.
A sub-area, one or more second sub-areas storing data of a predetermined section of the audio data, and one or more third sub-areas storing data of a predetermined section of the sub-picture data.
A sub-region, and a fourth sub-region in which effective control information is stored during reproduction of the moving image data in the predetermined section in the small region to which the sub-region belongs; and at least the second sub-region and the third sub-region. One of the areas stores data selectively reproduced from each other, and the control information is reproduced simultaneously with any one of the audio data to be reproduced simultaneously with the moving image data and the moving image data. One or more combinations of any one of the sub-video data and the reproducing device may include a reading unit that reads the object from the optical disc; and the moving image data and the audio data of the read object. A reproducing unit that reproduces the sub-video data; a holding unit that holds the control information that is valid for the moving image data in a predetermined section being reproduced; Controlling means for controlling the reading means so as to read the object from the optical disc, and controlling the reading means so as to read out the object from the optical disk. According to the selected combination, any one of them is selected, and the reproducing means is controlled to reproduce the moving image data, the audio data, and the sub-video data of the read object.

According to this configuration, the control information recorded in the small area 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 in the reproducing device is changed. Can be switched over.

Here, the control means may be arranged such that the control information has one or more command commands, and the command commands are effective during reproduction of the moving image data in the small area to which the control information belongs. Indicates a combination of any one of the audio data to be reproduced at the same time and any one of the sub-video data to be reproduced at the same time as the moving image data; Receiving means for receiving an execution instruction of the command, the control means, if the execution instruction is received, the voice data indicated by the instruction command instructed to execute the held control information, The reproducing means configured to reproduce the moving image data, the audio data, and the sub video data of the read object in combination with sub video data; It may be controlled.

Here, one of the objects is the object that is selectively reproduced with each other, and the control information included in the object that is selectively reproduced is during reproduction of moving image data in the small area to which the object belongs. And any one of the objects to be selectively reproduced, any one of the audio data to be reproduced simultaneously with the video data of the object, and the video data of the object. One or more combinations with any one of the sub-picture data to be reproduced are indicated, and the control means controls the one indicated by the held control information.
Selecting one of the two or more combinations,
The reproducing means controls the reading means to read the object indicated by the selected combination, and reproduces the moving image data, the audio data, and the sub-video data of the read object according to the selected combination. May be controlled.

Here, the control information includes one or more command commands, and the command commands are valid during the reproduction of the moving image data in the small area to which the control information belongs, and should be selectively reproduced. Combining one object, any one of the audio data to be reproduced simultaneously with the moving image data of the object, and any one of the sub-picture data to be reproduced simultaneously with the moving image data of the object The playback device further includes a receiving unit that receives an execution instruction of any of the command commands of the control information, and the control unit, if the execution instruction is received, receives the execution instruction of the control information. Controlling the reading means so as to read the object indicated by the instruction command instructed to be executed; Follow to the combination indicated by the command,
The reproducing means may be controlled to reproduce the moving image data, the audio data, and the sub-video data of the read object.

According to this configuration, even when there are many combinations of sub-picture data and audio data for the user, the user can easily select a desired combination.

Further, the reproducing method of the present invention is a reproducing method of digital data having one or more objects including moving image data, audio data, and sub-picture data, wherein the objects exist over one or more units. A first subunit in which data of a predetermined section of the video data is arranged, and one or more second subunits in which data of a predetermined section of the audio data are arranged;
One or more third sub-units in which data of a predetermined section of the sub-picture data are arranged, and a fourth sub-unit in which valid control information is arranged during reproduction of the moving picture data in the unit to which the sub-unit belongs.
Sub-unit, at least one of the second sub-unit and the third sub-unit stores data selectively reproduced from each other, and the control information should be reproduced simultaneously with the moving image data. One or more combinations of any one of the audio data and any one of the sub-picture data to be reproduced at the same time as the moving image data are shown. The sub-video data is reproduced, and the control information effective in the moving image data of the predetermined section being reproduced is held, and one of the one or more combinations indicated by the held control information is selected. Is configured to reproduce the moving image data, the audio data, and the sub-video data of the read object according to the selected combination. There.

According to this configuration, the control information recorded in the small area 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 in the reproducing device is changed. Can be switched over.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing a system stream in which one compressed moving image data and one 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 sectional view showing a physical structure of a DVD according to the embodiment of the present invention.

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

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

FIG. 6 shows an outline of the data structure of the entire optical disc in the embodiment.

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

 FIG. 7B shows a more detailed data structure of the route information.

FIG. 7C is a table in which VOB attributes in the route information are extracted.

FIG. 7D is a table in which VOB attributes indicating multi-angle blocks are extracted.

FIG. 8A is an explanatory diagram showing a relationship between a program chain and a video object.

FIG. 8B is an explanatory diagram showing a relationship between a program chain and a multi-angle block.

FIG. 9 shows an internal configuration of each video manager in the optical disc in the embodiment.

FIG. 10 shows a configuration of each piece of management information interleaved in the VOB in the embodiment.

FIG. 11 is an explanatory diagram of the multi-angle controlled by the multi-angle information in the embodiment.

FIG. 12A shows an appearance of a reproduction system in the embodiment.

FIG. 12B is a block diagram illustrating the overall configuration of the playback device according to the embodiment.

FIG. 13 shows an example of a key arrangement of a remote controller in the embodiment.

FIG. 14A is a block diagram showing a configuration of a system decoder in the embodiment.

FIG. 14B is a block diagram illustrating a configuration of a system control unit according to the embodiment.

FIG. 15 is a flowchart showing the processing content of the system control unit in the embodiment.

FIG. 16 is a detailed flowchart of a process of reproducing a program chain group by the system control unit in the embodiment.

FIG. 17 is a flowchart showing a volume menu display / reproduction process by the system control unit when the “menu” key of the remote controller in the embodiment is pressed.

FIG. 18 shows an example of a menu video object in the embodiment.

FIG. 19 shows an example of a video object for karaoke reproduction in the embodiment.

FIG. 20 shows the contents of the video object for selecting a karaoke part included in the volume menu program chain in the embodiment.

FIG. 21 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. 22 is a flowchart showing a method of manufacturing an optical disc in the embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION The multimedia optical disc in this embodiment has a diameter of
An example in which a digital video disk (hereinafter abbreviated as DVD) which has a recording capacity of about 4.7 GB on one side on a 120 mm optical disk will be described.

<Physical Structure of Optical Disc> 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 on which a reflective film such as a metal thin film is adhered, and a second transparent substrate 111, information layer 109 and second
Adhesive layer 1 provided between the transparent substrate 111 and
10 and optionally a second transparent substrate
A printing layer 112 for label printing is provided on 111. The printing layer 112 may be provided partially.

In the drawing, 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. Irregular pits are formed on the surface where the first transparent substrate 108 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 this pit
The pitch is shorter than that of the CD, and the pitch of the information track formed by the pit row is narrower. 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. Second transparent substrate
Reference numeral 111 denotes a reinforcing transparent substrate made of the same material as the first transparent substrate 108 and having the same thickness of about 0.6 mm and flat on both sides.

The information is extracted as a change in the reflectance of the light spot 114 when the light beam 113 is irradiated.

Since the light spot 114 on the DVD has a large numerical aperture NA of the objective lens and a small wavelength λ of the light beam, the diameter of the light spot 114 is about 1 / 1.6 as compared with the light spot on the CD.

A DVD having such a physical structure can record about 4.7 gigabytes of information on one side. The storage capacity of about 4.7 GB is about 8 times as large as that of the conventional CD. Therefore, 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 of video CDs. Due to such a recording capacity, a DVD is very suitable for a moving image recording medium.

The basic technology that has realized such a large capacity is to reduce the spot diameter D of the light beam. The spot diameter D is given by a calculation formula of spot diameter D = laser wavelength λ / numerical aperture NA of the objective lens. Therefore, 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 is generated due to a relative inclination between the disk surface and the optical axis of the light beam, which is called tilt. In order to reduce this, the thickness of the transparent substrate is reduced in DVDs. Thinning the transparent substrate raises another problem that mechanical strength is weakened, but DVDs reinforce this by bonding another substrate, 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 with a short wavelength of 650 nm and an optical system in which the NA (numerical aperture) of the objective lens is increased to 0.6 mm are used. This, combined with the fact that the thickness of the transparent substrate was reduced to about 0.6 mm, resulted in a diameter of 120 mm.
The information capacity that can be recorded on one side of a mm optical disk has reached about 4.7 GB. With such a large capacity, one movie produced by a movie company can be recorded on one common disc,
It can also be provided for a number of different language zones.

The recording capacity of 4.7 Gbytes realized by these substrate technologies 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. DV
The video object recorded in D 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. .

In the figure, the original moving image data sequence, audio data sequence, and sub-picture data sequence are shown together with the VOB. this is
MPEG2 (Moving Picture Expert Group, ISO13818)
It conforms to the compression method and data format specified in.

The “moving image data sequence” is a serial moving image data sequence in a compressed stage, and is divided into “video1, video2, video3,...” In units called GOPs (Group of Picture).
・ ・ 」. Here, the GOP is about 12 to 15 frames for moving image data and about 0.5 seconds to
This is moving image data for about one second 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. In the figure, three types of audio signals of audio A, B, and C are combined into “audio A−1, audio”. A-2 ... "
"Audio B-1, audio B-2 ...""audio C-1, a
It is expressed as 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 containing compressed graphics. In FIG.
... "SP B-1, SP B-2,...". SP A-1, SP A-2,... Are each 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 interleaving cycle is a GOP unit at the same time.

Furthermore, what is particularly noteworthy in this embodiment is that management information is interleaved in the VOB. A minimum unit including management information and other data in a VOB is hereinafter abbreviated as VOBU.
Information for realizing interactive reproduction, in particular, information for switching between audio data and sub-picture data to be reproduced together with moving image data in a reproduction device is recorded in the management information. The reason why the size of each pack is 2 kB is that the size of each pack is the same as the minimum read unit of the playback device, that is, the size of a logical block (sequence) in FIG. Further, the management information is one for one VOBU (one pack). This is useful for easily realizing dynamic playback control even in a playback device having a small memory capacity.

According to a data structure such as a VOB, for example, in a VOB for recording a movie, multilingual audio data or subtitle subtitle data in a multilingual language can be recorded together with a moving image. Since it is not necessary to provide the system stream, the recording capacity of the optical disk can be used efficiently.

FIG. 5 shows VOB interleaved video data,
FIG. 4 is an explanatory diagram showing packed data formats of audio data, sub-picture data, and management information.

As shown in the figure, each data in the VOB is recorded in a packetized and packed format conforming to MPEG2. In this embodiment, one pack is a PES (Packetized Elementary S).
tream) contains one packet called a packet, which consists of a pack header, a packet header, and a data field
It has a size of 2K bytes long. 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, so the description is omitted. Will be described.

The “stream ID” field included in the packet header is a video packet representing a video data sequence,
This is an 8-bit field indicating whether the packet is a private packet or an MPEG audio packet. Here, the private packet is data whose content can be freely defined in the MPEG2 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.

Private packet 1 also contains a substream
An ID field is provided. "Substream ID"
Is an 8-bit length field indicating whether the data is audio data or sub-picture data. The audio data defined by the private packet 1 has a maximum of 8 from # 0 to # 7 for each of the linear PCM system and the AC-3 system.
The type is the setting function. The sub-picture data is # 0 to #
Up to 32 types up 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.

"Data field" is MPEG for video data
2 format compressed data, linear P for audio data
In the case of data of the CM system, the AC-3 system or the MPEG system, and in the case of sub-picture data, this field records graphics data compressed by run-length encoding.

<Data Structure of Entire Disc> FIG. 6 shows an outline of the data structure of the entire optical disc in the present embodiment.

As shown in the figure, the area where data is recorded on the optical disk is roughly classified 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 the sake of explanation. 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 disc, and records data for stabilizing the 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.

The “volume area” is located between the lead-in area and the lead-out area, and physically consists of a 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 matches the size of each pack of video data, audio data, sub-picture data, and management information shown in FIG.

"Volume management area" is taken from the first block by the number of blocks necessary for managing the entire disk, for example,
For example, ISO (International Standards Organizaiti
on) Information of the file in the file area is recorded according to the 13346 standard.

"Video manager" represents management information of the entire disc. The 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” stores a plurality of VOBs and information for controlling their reproduction, and has a size of an integral multiple (2048 × n) of the logical block. Here, the title set is a generic name of three titles for each version when there are three versions of the same movie, such as an uncut version, a theater release version, and a television broadcast version. In this case, VOBs can be shared between titles having different versions, and therefore, the VOB of the shared portion and the VOB for each version are recorded in the video title set. The size of one VOB is one scene of a movie, one movie, one song of karaoke, or determined by the producer.

<Data Configuration of Video Title Set> FIG. 7A 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. Each VOB is
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.

The “video title set management table” indicates the internal configuration 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) refers to a VOB that is determined in the above-described playback order and is played back in series. Therefore, the title creator can set an arbitrary number of VOBs in an arbitrary order by setting the above-mentioned route information to obtain one.
Can be one PGC.

Each PGC information further includes a playback time, a pre-processing command,
Post-processing commands and route information are recorded.

 “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, a LINK instruction for indicating a PGC to be reproduced next, and as an example of the latter, a SETSTN instruction for specifying which combination of a plurality of audio data in a VOB and a plurality of sub-picture data are to be reproduced. is there.

The “path information” indicates a reproduction procedure of a plurality of VOBs constituting the PGC, and includes a pointer string indicating a logical address of a storage area on the optical disc of each VOB as shown by an arrow in FIG.
This column of pointers indicates the order of reproduction of the individual VOBs constituting the PGC. For example, as shown in FIG. 7B, PGC information # 1
Path information includes pointers to the respective VOBs # 1, # 2, and # 3. According to the PGC information # 1, VOB # 1 is reproduced first, then VOB # 2 is reproduced, and finally VOB # 3 is reproduced. Further, the path information includes, for each VOB pointed to by the pointer, a VOB attribute indicating whether or not the element is a multi-angle block element. Here, the multi-angle block is a plurality of VOBs having moving image data viewed from different viewpoint positions (or lines of sight).

“Title search pointer management information” is a table of contents of the video titles in the present video title set. For each video title included in the present video title set, the PGC belonging to the video title and the Indicates the PGC to be played.

Hereinafter, the details of the route information in the PGC information will be further described.

FIG. 7B shows a more detailed data configuration example of the route information (referred to as route information # 1) in the PGC information # 1. Also, FIG.
This is an excerpt from the route information # 1 of the PGC information # 1 and shown as a list table. As shown in FIG.
In the table, VOB information # 1 to VOB information # 3 indicating VOBs that are elements of PGC # 1 are arranged in the order of reproduction. One VOB information is V
It consists of a pointer that points to the storage area of the OB, and the VOB attribute that is represented by the block type and 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, of the plurality of VOB information in the route information,
Indicates which VOB information from the 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. 7C is an example of a normal (non-angled) PGC. According to this route information # 1, FIG.
As shown in A, one PGC # 1 is reproduced by reproducing VOBs # 1, # 2, and # 3 in series.

Also, the route information including the multi-angle block (# 2
7D is shown in FIG. 7D. FIG. 8B is an explanatory diagram of PGC # 2 based on the route information # 2. In route information # 2 of FIG. 7D, the elements of PGC # 2 are VOBs # 4 to # 8. Of these, VOBs # 5, # 6, and # 7 have a block type of angle, a block mode of
Since they are intermediate and final, they form a multi-angle block as shown in FIG. 8B. In this case, PGC # 2 is
Rather than being played back in series in the order of # 4, # 5, # 6, # 7, # 8, under the control of the playback device, VOB # 4 is played back first, and then one in the multi-angle block. VOB
Is played back alternatively while being switched according to the user's remote control operation, and finally VOB # 8 is played back.
At this time, when the playback is started first in the section of the multi-angle block, the VOB (that is, the default angle) is
Angle mode is the first VOB. In the example of FIG. 7D, VOB
The VOB reproduced after # 4 has the block mode first,
That is, VOB # 5.

<Data Configuration of Video Manager> FIG. 9 shows the internal configuration 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 the volume menu management information is added, and the PGC information includes the automatic reproduction branch information, the pause reproduction information, and the menu selection information. There is no difference. However, the data structures of FIG. 9 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 a configuration inside the video manager management information, that is, a 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.

“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 setting / control of reproduction control of the whole volume.
A menu for making changes, which is displayed by pressing the “Menu” key on the remote control at any time during disc playback. In the case of a karaoke disc, the title in the volume (in this case, This is a menu for selecting a song. Data representing the menu itself is recorded as one or more PGCs. The volume menu management information is stored in, for example, 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. Also,
The above-mentioned “Menu PGC information table”
It is a table that records one or more PGC information. As indicated by the arrow in the figure, the content is designated by access information included in the volume menu management information. In addition, the above volume menu itself includes a plurality of volume menus specified in this table.
Since it is represented by PGC, whether a hierarchical menu or a menu including voice guidance can be configured, an arbitrary form of menu can be configured.

<Data Structure of Management Information in VOB> FIG. 10 shows the structure of each piece of management information interleaved in the VOB of FIG. As shown in FIG.
It consists of 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, Consists of multiple choices,
Further, the selection item includes item display information and a highlight command, and is information for realizing an interactive process with the user such as an inquiry by displaying the item image by the sub-video data and a response by the selection operation by the remote controller.
Since this highlight information exists for each VOBU in FIG.
Interactive processing can be realized at any playback point in the VOB.

“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 change in color to indicate 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 indicating the same number of items in the menu as the number of selection items. In the present embodiment, the selection items include a plurality of items indicating combinations 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 indicates a reproduction control command to be executed when the corresponding item is selected and confirmed. Specific examples of commands include the LINK instruction and SETS
There is a TN instruction. The LINK instruction is described as “LINK PGC # n” and instructs a jump to PGC # n. #N is
It represents the number of PGC information in the PGC information tables shown in FIGS. 7A and 9. With this command, the playback device cancels the playback of the PGC currently being played back and sends the designated PGC information #
n, and the reproduction of PGC # n is started accordingly. The SETSTN instruction is described as “SETSTN #i, #j”, and instructs reproduction in a combination of audio data #i and sub-picture data #j. #I and #j represent the number of audio data and the number of sub-picture data in the VOB, respectively. According to this command, the playback device switches the audio data and the sub-video data being reproduced to the designated audio data #i and sub-video data #j in the PGC currently being reproduced. In addition, the SETSTN instruction
An angle number in a multi-angle block may be specified by the third parameter #k such as “SETSTN #i, #j, #k”.

These commands are the pre-processing commands already described,
Common to post-processing commands and highlight commands. As a guideline for the use of these commands, the pre-processing command is mainly for initial setting of the combination of audio data and sub-picture data in PGC playback, the highlight command is for changing settings according to user operation, and the post-processing command is mainly for 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 playback function supported by data in the GOP, and includes multi-angle information as one of the playback functions. Multi-angle information means that a video viewed from different viewpoints
And information for switching to an angle desired by the operator during reproduction. Specifically, angle #
When there are n VOBs corresponding to 1 to #n, the multi-angle information includes n jump destination addresses (logical block addresses) corresponding to the angle numbers. Each jump address is a jump address to another angle,
This indicates the playback position of the moving image data at approximately the same time as the moving image data of the VOB including the multi-angle information.

FIG. 11 is an explanatory diagram of multi-angle reproduction controlled by the multi-angle information. In the figure, VOB
# 4 to VOB # 8 are VOBs in the PGC # 2P shown in FIG. 8B, and VOB # 5 to VOB # 7 are multi-angle blocks. VOB # 5 to VOB # 7 in this section 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 view 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, VOB
In the multi-angle information of # 5, jump destination information to VOB # 6 and jump destination information to VOB # 7 are recorded. VOB
The same applies to # 6 and VOB # 7. The user instructs to switch the angle by pressing the “ANGLE” key on the remote controller 91. When the angle switching is instructed, the reproduction is started from the jump destination information corresponding to the angle specified by the reproduction device.

This concludes the description of the data structure recorded on the disc of the present embodiment, and then describes a reproducing apparatus for the optical disc having the above data structure.

<Appearance of Reproduction System> FIG. 12A is an external view of a reproduction system including a reproduction device, a monitor, and a remote controller according to the present embodiment.

3, the playback apparatus 1 plays back the DVD shown in FIG. 3 according to an operation instruction from a remote controller 91, 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 Playback Apparatus> FIG. 12B is a block diagram illustrating the overall configuration of the playback apparatus in the present embodiment. This playback device includes a motor 81, an optical pickup 82, a mechanism controller 83, a signal processor 84, an AV decoder 85, a system decoder 86, a remote controller 91, a remote controller receiver 92, and a system controller 93. Further, the system decoder 86 includes a video decoder 87 and a sub-picture decoder.
88, an audio decoder 89, and a video synthesizing unit 90.

The mechanism control unit 83 controls a mechanism system including a motor 81 for driving the disk and a pickup 82 for reading a signal recorded on the disk. Specifically, the mechanism control unit 83 adjusts the motor speed according to the track position instructed from the system control unit 93, and simultaneously controls the actuator of the optical pickup 82 to move the pickup position, and performs servo control. When an accurate track is detected, the apparatus waits for rotation until a desired physical sector is recorded, and reads a signal continuously from a desired position.

The signal processing unit 84 amplifies the signal read from the optical pickup 82, performs waveform shaping, binarization, demodulation, error correction, and the like, and then stores the logical block in a buffer memory (not shown) in the system control unit 93. Store in unit. 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 the VOB is transferred from the buffer memory to the system decoder 86 under the control of the system control unit 93.

The AD decoder unit 85 converts the processed VOB 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
Then, the audio data is output to the audio decoder 89, 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 that time, the system decoder 86
Of the plurality of audio data and the plurality of sub-picture data, the audio data of the number designated by the system control unit 93 and the sub-picture data are output to the audio decoder 89 and the sub-picture decoder 88, respectively. Is destroyed. The management information output to the system control unit 93 is
It 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 as a digital video signal to the video synthesizing section 90.

If 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 is performed by the graphics processing. The data subjected to is output. 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 unit 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 unit 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 by a user operation. FIG. 13 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 an interrupt.

The system control unit 93 includes a program memory that stores a program that implements 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 when 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. If the signal is a VOB, the signal 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 management information in the VOBU is received from the system decoder 86, temporarily stored in another buffer memory (hereinafter, referred to as a second buffer), and playback control is performed based on the content.

<Configuration of System Decoder> FIG. 14A is a block diagram showing a configuration of system decoder 86 in FIG. 12B. As shown in the figure, the system decoder
86 is an MPEG decoder 120, a sub-picture / audio separation unit 12
1. It comprises a sub-picture selection unit 122 and an audio selection unit 123.

The MPEG decoder 120 receives the V transferred from the buffer memory.
For each data pack included in the OB, determine the type of packet by referring to the stream ID in the packet header,
If it is a video packet, it goes to the video decoder 87. If it is a private packet, it goes to the sub-picture / audio separation unit 121.
To the private packet 2, the system control unit 93
To the audio selector if it is an MPEG audio packet
The packet data is output to 123.

The sub-picture / audio separation unit 121 determines the packet type of the private packet 1 input from the MPEG decoder 120 with reference to the sub-stream ID. If so, the data is output to the audio selection unit 123. As a result, the sub-picture data of all numbers and all the audio data are sent to the sub-picture selecting unit 122 and the audio selecting unit 1
Output to 23.

The sub-picture selecting unit 122 outputs only the sub-picture data of the number designated by the system control unit 93 to the sub-picture decoder 88 among the sub-picture data from the sub-picture / audio separating unit 121. Sub-picture data other than the designated number is discarded.

The audio selection unit 123 receives the MPEG from the MPEG decoder 120.
Of the audio data from the audio / 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 specified number is discarded.

<Detailed Configuration of System Control Unit> FIG. 14B is a functional block diagram illustrating a more detailed configuration example of the system control unit 93 in the embodiment.

The system control unit 93 includes a buffer memory 931 and a first
Buffer 932, second buffer 933, remote control input interpreter 93
4. It comprises a button control section 935, a command interpretation section 936, a system state management section 937, and a playback control section 938. The buffer memory 931 temporarily holds the data read from the optical disk via the signal processing unit 84 in logical block units, and when the VOB is being read under the control of the reproduction control unit 938, the The held contents are output to the system decoder 86. When the contents other than the VOB, that is, when the video title set management information and the video manager management information are 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
It is sufficient if at least one PGC information can be held.

The second buffer 933 holds the management information in the VOBU output from the system decoder 86. This held content is overwritten each time the management information in the VOBU that is sequentially read is output. Therefore, this capacity may be one management information, that is, 2 kB. The buffer memory 931 and the first buffer 93
Second, the second buffer 933 may actually be a different area in one memory, and is separately treated functionally in FIG. 14B.

Remote control input interpreting section 934 receives key data from remote control receiving section 92, interprets which button has been pressed, and notifies button control section 935 of the button type.

Based on the management information stored in the second buffer 933 and the button notification from the remote control input interpreting unit 934, the button control unit 935 determines whether to execute the highlight command and whether to color or reflect the video. Control. More specifically, (1) when a cursor key or a numeric keypad is pressed is notified as a button notification, the selection color is displayed on the display portion of the selection item in 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. 10 and the item display information for each selection item. Also, (2) when the enter key is notified, an instruction is given to color the display portion of the selected item with a fixed color, and if a highlight command is set for the selected item, the high 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 interpreter 936 instructs an angle switching command. 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 interpretation unit 936 receives a highlight command, a volume menu playback command, a title menu playback command, and an angle switching command from the button control unit 935, and interprets and executes them. More specifically, as a result of the interpretation, the command
If it is “STN #i, #j”, the audio number #i and the sub-picture data number #j are written into specific registers in the system state management unit 937. Since the value of this specific register is directly notified to the system decoder 86, the audio number #
It is immediately switched to reproduce the combination of i, sub-picture data number #j. As a result of the interpretation, if the highlight command is “LINK PGC # n”, the reproduction control unit 9
Instruct 38 to read PGC information #n. As a result of the interpretation,
In the case of 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 is instructed to the jump address to another angle having the updated angle number. To read other angles. This is the same when an angle number is specified by the SETSTN instruction.

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

The playback control unit 938 controls the overall reading of the optical disc 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 first buffer 932. For example, as a post-processing command held in the first buffer 932 or as an instruction from the command interpretation unit 936, “LINK P
When “GC # n” is received, reading of PGC information #n is newly controlled. In addition, the reproduction control unit 938 performs control to read a series of VOBs according to the path information in the first buffer. In this series of read control of VOBs, as shown in FIG. 7B, 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. The playback control unit 938 has a block type of “angle”
If the block mode is "head" and the angle number is held in the specific register in advance, the VOB of the angle number in the multi-angle block 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 is set to the first VO.
Read B. Also, if the block mode is “intermediate” or “final”, the reproduction control unit 938 determines that the reproduction of one VOB in the multi-angle block has been completed, According to VOB information. Therefore, in the example of FIG. 7B, VOB # 4, VOB # 5, and VOB # 8 are reproduced in this order.

<Schematic Processing of System Control Unit> FIG. 15 is a flowchart showing processing contents of the system control unit 93 in FIG. 12B.

First, when the system control unit 93 detects that the disc has been set in the playback device, the system control unit 93 controls the mechanism control unit 83 and the signal processing unit 84 to perform disc rotation control until stable reading is performed, At this point, 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 (step 12).
1, 122). Further, the system control unit 93 reproduces the volume menu PGC according to the volume menu management information in the video manager (step 123). At the time of playback of the volume menu PGC, 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 disc may be omitted if it is not necessary according to the purpose of the multimedia data.

Next, the system control unit 93 displays the PGC for the title menu according to the title search pointer management information in the video manager (step 124), and, based on the user's selection (step 125), the video title including the selected title. The video title set management information in the set is read (step 126), and the P
Branch to GC (step 127). Further, the PGC group is reproduced, and when the reproduction is completed, the process returns to step 124 (step 1).
28).

<Reproduction Processing of System Control Unit> FIG. 16 is a detailed flowchart of the PGC group reproduction processing by the system control unit 93. This process is a process common to steps 123, 124, and 128 in FIG.

In FIG. 16, first, the system control unit 93 reads out the corresponding PGC information from the PGC information table of the video manager or the video title set (step 131), and executes the preprocessing command (step 132). If the command is a SETSTN instruction, the sub-video data and audio data numbers #i and #j specified in the command are
It instructs the audio selector 123 and the sub-picture selector 122 in the system decoder 86, respectively. If an angle number is also specified in the SETSTN instruction, the angle number is set in the above-described 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 9 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. After this, the system control unit
93 receives the management information separated by the AV decoder unit 85 (step 134), decodes the general information and trick play information in the management information shown in FIG. 10, and performs control according to the decoding result (step 135). .

Further, the system control unit 93 decodes the highlight information in the management information (step 136), and
When the key data corresponding to the cursor key or numeric keypad is received from step 2, the item selected on the display screen and the selected color are changed (steps 137 and 138), and the key data corresponding to the enter key is received. Changes the color of the item selected on the display screen to the confirmed color (steps 139 and 139).
At the same time, the command corresponding to the determined item is executed (step 141). The processing of this command is the same as the above-mentioned pre-processing command.

Next, if there is a VOB to be reproduced next, the system control unit 93 returns to step 133 (step 142: no),
If there is no VOB to be reproduced next (when the PGC is completed) (step 142: yes), the branch destination PGC is determined (step 142), and a 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 a title menu, the process returns to step 124 shown in FIG. 15 (step 14).
4: no), otherwise return to step 131 (step 144: yes).

<Volume Menu Display Process of System Control Unit> FIG. 17 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 the figure in the interrupt processing by pressing the “menu” key. After the occurrence of the interrupt, the system control unit 93 executes the PGC currently being played back.
The number and the logical block address indicating the current playback position of the VOB are saved in the memory (Step 145), and the video manager is read (Step 146). This video manager may be read from the optical disc in the same manner as in step 122 of FIG. 15, or may be stored in a memory at the time of reading in step 122 and read.

Further, the system control unit 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 “SETSTN # 2, # 3”, the system control unit 93 converts the selected audio data # 2 and sub-picture data # 3 into the audio selection unit 123,
The sub-picture selecting unit 122 is instructed.

After the reproduction of the volume menu PGC is completed, the system control unit 93 restores the saved PGC number and the logical block address indicating the original reproduction position of the VOB from the memory (step 148), and exits the interrupt processing (step 148). Step 14
9). Thereby, the reproduction from the reproduction position of the VOB in the original PGC is restarted. At this time, by the above SETSTN instruction,
The sub-picture data and audio data to be reproduced are switched to numbers desired by the user.

The operation of the playback device configured as described above will be described.

First, the read / reproduce operation of a disc, which is the basis of the five operation examples described later, will be briefly described.

When the disk is set in the playback device, the disk rotation control is performed until stable reading is performed, and when the disk becomes stable, the optical pickup is moved to read the volume management block shown in FIG. 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 menu for selecting a karaoke title (in this case, a song). If the selected song is a duet song, it is assumed that a duet part selection menu as shown in FIG. 20 is prepared as a title menu.

When the reproduction of the title selected in the volume menu is started, as shown in FIG. 9, the title search pointer management information recorded at the head of the video title set including the title is read. Further, when the title is a duet song, the title search pointer management information records the PGC number 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.

Figure 1 shows an example of the volume menu PGC played here
See Figure 8. The PGC in the figure is for selecting a menu of the title "Karaoke for duet", and the PGC is composed of one VOB # J. Video 300-350 in this VOB is MPEG
A still image represents the menu background image. The sub-picture data (SPs in the figure) 300 to 350 represent two-color character images as selection items to be superimposed on the background image, and are colored according to the color information of the highlight information in the management information 300 to 350. audio
300 to 305 and 310 to 315 represent guidance voices for prompting selection. Highlight commands # 1 to # 3 in management information
Records a LINK instruction corresponding to the selected item. The video data and the sub-video data are combined and output by the playback device during playback.

Assuming that the user presses the “2” button by operating the remote controller 91 after listening to the reproduced menu display and guidance voice, 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 executes processing corresponding to the button of “2”, that is, VO
Interpret the command "LINK PGC # 11" corresponding to the button "2" in the highlight information in the control data of B, read out the PGC information # 11, and reproduce the PGC # 11 in the same manner as above. Be started.

Next, the data recorded on the disc are (1) a karaoke disc, (2) an English conversation teaching material, (3) a quiz, (4) a golf game, and (5) a baseball broadcast. An example of each operation will be described below.

(1) Operation in the case of a karaoke disk FIG. 19 shows a karaoke playback VOB (VOB) used in this operation example.
#K). In this VOB #K, three different sub-picture data (SP) # 1 to # 3 and audio # 1 to # 3 are interleaved with one video 400 to 500 representing a background image. 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 according to the reproduction of the song, but here, for simplicity, the color change with time is not considered. In the audio data shown in the figure, △ indicates that only the accompaniment of the male part and the female part are recorded, respectively.

The procedure and operation of playing a karaoke disk containing such a VOB # K will be described.

First, when the disc is set in the playback device and playback is started, the video manager shown in FIG. 6 is read into the system control unit 93, and 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 described above and shown in FIG. 18 is reproduced. Further, when a duet title is selected in the title selection menu, a title menu for selecting a duet music part is reproduced.

FIG. 20 shows the contents of the karaoke part selection VOB (VOB # L) included in the part selection title menu PGC. Since it has the same structure as the title selection volume menu (VOB # K) shown in FIG. 18, 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. FIG. 1 shows the management information of the VOB # L.
The “SETSTN #i, #j” command is recorded in the highlight information indicated by “0”. The selection items # 1 to # 3 are selected corresponding to buttons "1" to "3" of the remote controller 91.
As a result, when the “2” female part is selected by the remote control 91 button, the playback control commands “SETSTN # 3, #SET”
3 "is executed, and the system decoder 86 is instructed to switch between audio data and sub-pictures. Since the reproduction of the tune shown in FIG. 19 starts after this instruction is issued, appropriate audio and sub-picture are output.

If a problem occurs due to the immediate execution of the command, the system control unit 93 can provide an appropriate delay. Further, since the command can be set not only in the playback portion of the disc menu but also in all PGCs, 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. 10 may be recorded in all the management information in the VOB # K for karaoke reproduction in FIG. The same highlight information can be recorded because the menu VOB # L and the karaoke VOB # K have the same data structure. In this way, during the reproduction of the karaoke, the corresponding SETSTN instruction is executed in response to pressing any one of the buttons “1” to “3” on the remote control. As a result, 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, the user can easily select appropriate audio data and sub-picture data according to the menu. can do. 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 instruction.

(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 is shown. Next, the playback mode is automatically switched according to the progress of the playback, and different audios are provided in one VOB. The following describes an example in which the reproduction is sequentially performed 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 audio and subtitles change. (Conventionally, as described in the example of a video CD, all changing patterns had to be recorded as separate VOBs, so there was a problem that video data having a large data amount was recorded redundantly.) The operation example shows that the part of the conversation example repeated by using the post-processing command of the calling PGC can be shared by the same stream.
FIG. 21 shows an example in which the same VOB (referred to as VOB # M) is reproduced three times with different combinations of audio data and sub-picture data. In the figure, three PGCs # 1 to ##
In No. 3, the same VOB # M1 is designated in the route information. As shown in FIG. 9, a pre-processing command and a post-processing command can be recorded in the PGC. First, in reproducing PGC1 # 1, the pre-processing command "SETSTN # 1, #
1 "is executed, and audio # 1 and sub-picture # 1 are reproduced together with the main picture. When playback of PGC1 ends, PGC #
1 Post-processing commands "SETSTN # 2, # 2" and "LIN
"K PGC # 2" is executed, and the flow proceeds to the reproduction of PGC # 2. PGC # 22
In the reproduction of, the audio # 2 and the sub-picture # 2 are reproduced together with the main video based on the previous setting, and when the reproduction is completed, the post-processing commands "SETSTN # 3, # 3" and "LINK PGC #"
3 "is executed. In this state, PGC # 3 is reproduced, and when the reproduction is completed, the post-processing command “SETSTN
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. In this example, 3
Although one PGC is used, the PGC information has a size that is negligibly small compared to the amount of VOB, 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 achieves this includes video data that is a hint, multiple audio data that describes the explanatory sound that is a hint to solve the quiz, and multiple sub-pictures that have different positions and areas at different masking positions for the moving images that are the hints. 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 seen in this operation example, the possibility of realizing new multimedia software such as a quiz such as a game feeling mainly for moving images necessary for expanding the use of DVD is increased.

(4) Operation in the Case of a Golf Game An operation example in which effective sub-video data is generated when 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 the green.

In the VOB used in this example, the video data is a moving image moving 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 first three are recorded at the beginning of the VOB,
It is set in the graphics processing section in the sub-picture decoder 88 at the start of reproduction. 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 putting line program has a function of moving the ball mark display in accordance with the cursor key operated by the user. When the ball mark display is moved to an arbitrary putting position, the three-dimensional shape data is then moved according to the enter key. The line up to the cup is displayed according to the undulation represented by.

Thus, a user who wants to know the putting line can see the line from the ball mark display position to the cup simply by adjusting the ball mark display to an arbitrary putting position. Also, it is possible to reproduce a video with a sense of realism and three-dimensionality that cannot be obtained with a conventional TV.

(5) Operation Example in the Case of Baseball Relay Here, an example will be described in which the switching of audio data and sub-image data is dynamically changed according to the switching of angles in a 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 backnet, (2) first base side (3) third base side in baseball broadcasting. In this case, VOB1 is composed of video data 1 representing a moving image viewed from behind the backnet and audio data # 1 representing a common voice.
-1. VOB2 is video data 2 representing a moving image viewed from the first base, and audio data # 2 representing a common voice.
-1 and audio data # 2-2 representing the voice of the first base.
Consists of VOB3 is video data 3 representing a moving image viewed from the third base and audio data # 3-1 representing a common voice.
And audio data # 3-2 representing the sound 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 of the backnet 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.

Further, for each of the management information of VOBs 1 to 3, "SETSTN
# 1, # 0 "," SETSTN # 2, # 0 "," SETSTN #
2, # 0 "is filled in 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 with a sense of realism according to the angle. Less than,
A method for manufacturing an optical disk according to an embodiment of the present invention will be briefly described.

FIG. 22 is a flowchart showing a method for manufacturing an optical disc according to the present invention. First, the data of the volume area shown in FIG. 6 is created by the logical data string creation device (step 191). This logical volume data creation device
Volume data having the data structure shown in FIG. 6 can be created 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 creating device (step 192). This physical data string has an ECC (Error) after the data of the lead-in area and the data of the lead-out area are added to the volume data.
Correction Code). In the master disc cutting using the physical data sequence, a master disc of the optical disc is created (step 193). 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 Asakura Shoten "Optical Disc System", Optical Discourse of the Japan Society of Applied Physics.

In the first operation example (karaoke example), the SETSTN instruction for designating a combination of audio data and sub-picture data to be reproduced was executed in the title menu for selecting a part immediately before the reproduction of the music was started. However, 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 may be vector graphics or three-dimensional computer graphics (CG). By using these, compressed moving images and CGs
It is also possible to realize a game by a combination of the above.

The present invention indicates that the applicability of a DVD, that is, a digital video disc, is not a simple video disc, but a multimedia disc, and the number of audios and sub-pictures is not limited to movie subtitles or karaoke. Lyrics may be a few to a few tens at best, but they also work when hundreds to thousands of audios and sub-pictures are interleaved.

The audio data is not limited to compressed audio but may be uncompressed PCM data or computer audio such as MIDI.

In the present embodiment, a case has been described where control data interleaved in 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 when performing trick play such as fast forward or rewind, pointers to the next and previous GOPs are required,
This is a result of sharing control data packets for trick play. However, the unit in which the control data packets are interleaved is not limited to the GOP.

Further, in the present embodiment, the description has been made using a DVD read-only disc, but the same effect can be obtained with a rewritable disc.

Furthermore, 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. VOB of the present invention
Is based on the MPEG standard, but may be extended in the future,
Even if a new standard is used, it is sufficient that a plurality of data are interleaved and reproduced in chronological order.

The description has been made on the assumption that the number of compressed moving image data to be interleaved is one, but the number 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. By doing so, it is possible to perform the reproduction control for each finer time.

In this embodiment, a DVD is used as a recording medium. However, any recording medium capable of storing multimedia data composed of one or more video data, audio data, and sub-picture data that can be selectively reproduced is used. However, it 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 the recording medium, and the multimedia data may be taken out by receiving a digital broadcast wave. In this case, the playback device 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. 12B.

INDUSTRIAL APPLICABILITY As described above, the optical disc according to the present invention has a plurality of audio data and a plurality of sub-picture data interleaved and recorded together with moving picture data, and records a movie, karaoke, and the like. It is suitable for control for dynamically switching data combinations. In addition, the reproducing apparatus and the reproducing method of the present invention, even during the reproduction of the optical disk, audio data to be reproduced together with the moving image data, sub-video data, or a combination thereof,
Suitable for dynamic switching playback control.

Continuation of the front page (72) Inventor Nohisa Fukushima 6-14 C-508 Sekime, Joto-ku, Osaka-shi, Osaka (72) Inventor Katsuhiko Miwa 1-4-4 Nonakaminami, Yodogawa-ku, Osaka, Osaka 40-444 (56) References JP-A-59-214389 (JP, A) JP-A-2-292933 (JP, A) JP-A-3-116474 (JP, A) JP-A-4-17581 (JP, A) JP-A-5 -12804 (JP, A) JP-A-5-61403 (JP, A) JP-A-8-314485 (JP, A) JP-A-8-339194 (JP, A) JP-A-9-259506 (JP, A) JP-A-9-259507 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G11B 20/12-20/12 103 G11B 27/00 G11B 27/10 G11B 7/00

Claims (9)

(57) [Claims] 1. An optical disc reproducing apparatus having a data area for storing one or more objects including moving picture data, audio data, and sub-picture data, wherein the data area of the optical disc includes a plurality of small areas. The object is stored over one or more of the small areas, and each of the small areas stores data of a predetermined section of the moving image data.
One or more first sub-regions, and 1 in which data of a predetermined section of the audio data is stored
One or more second sub-areas, one or more third sub-areas in which data of a predetermined section of the sub-picture data is stored, and A fourth sub-area in which valid control information is stored; at least one of the second sub-area and the third sub-area stores data selectively reproduced from each other; The information indicates one or more combinations of any one of the audio data to be reproduced simultaneously with the moving image data and any one of the sub-video data to be reproduced simultaneously with the moving image data. An apparatus configured to read out the object from the optical disc; a reproducing unit configured to reproduce the moving image data, the audio data, and the sub-video data of the read object; Holding means for holding the control information effective for the moving image data in a predetermined section of the medium, and control means for controlling the reproducing means with the reading means, wherein the controlling means reads the object from the optical disc. Controlling the reading means so as to read, selecting one of the one or more combinations indicated by the held control information, and according to the selected combination, the moving image data of the object read and the A playback device that controls the playback unit to play back audio data and the sub-picture data. 2. The control information includes one or more command commands, wherein the command commands are valid during reproduction of the moving image data in the small area to which the control information belongs, and are reproduced simultaneously with the moving image data. Indicates a combination of any one of the audio data to be performed and any one of the sub-picture data to be reproduced simultaneously with the moving image data; Receiving means for receiving an execution instruction, the control means, if the execution instruction is received, the audio data and the sub-picture data indicated by the command command instructed to execute the held control information; And controlling the reproducing unit to reproduce the moving image data, the audio data, and the sub-video data of the read object in a combination of Patent reproducing apparatus ranging first claim of claim. 3. The object according to claim 1, wherein the object is one of the objects selectively reproduced from each other, and the control information included in the object selectively reproduced includes moving image data in the small area to which the object belongs. Any one of the objects that is valid during reproduction and is to be selectively reproduced, any one of the audio data to be reproduced simultaneously with the moving image data of the object, and the moving image data of the object At least one combination with any one of the sub-picture data to be reproduced at the same time is indicated, and the control unit indicates any one of the one or more combinations indicated by the held control information. Controlling the reading means so as to read the object indicated by the selected and selected combination, and reading the object in accordance with the selected combination; Wherein said moving picture data of the object that has issued said voice data controls the reproducing device to reproduce the sub-picture data, patents reproducing apparatus ranging first claim of claim. 4. The control information includes one or more command commands, and the command commands are valid during reproduction of the moving image data in a small area to which the control information belongs, and should be selectively reproduced. Any one of the objects, any one of the audio data to be reproduced simultaneously with the moving image data of the object, and any one of the sub-video data to be reproduced simultaneously with the moving image data of the object; The playback device further includes a receiving unit that receives an instruction to execute any one of the command commands in the control information, and the control unit holds the control when the execution instruction is received. Controlling the reading means to read the object indicated by the instruction command instructed to execute information; Follow the combinations indicated decree command, the read control the reproducing device to reproduce the sub-picture data and the moving image data and the voice data of the object, the reproducing apparatus ranging third claim of claims. 5. A method for reproducing an optical disc comprising a data area for storing one or more objects including moving picture data, audio data, and sub-picture data, wherein the data area of the optical disc comprises a plurality of small areas. The object is stored over one or more of the small areas, and each of the small areas includes a first sub-area in which data of a predetermined section of the moving image data is stored, and data of a predetermined section of the audio data. 1 where is stored
One or more second sub-areas, one or more third sub-areas in which data of a predetermined section of the sub-picture data is stored, and A fourth sub-area in which valid control information is stored; at least one of the second sub-area and the third sub-area stores data selectively reproduced from each other; The information indicates at least one combination of any one of the audio data to be reproduced simultaneously with the moving image data and any one of the sub-video data to be reproduced simultaneously with the moving image data. Reading the object from the optical disc, reproducing the moving image data, the audio data, and the sub-video data of the read object, and reading the moving image data of a predetermined section being reproduced. Holding the control information effective in the data, selecting one of the one or more combinations indicated by the held control information, and, according to the selected combination, the moving image data of the object read out. Playing the audio data and the sub-picture data,
Playback method. 6. The control information includes one or more command commands, and the command commands are effective during reproduction of the moving image data in the small area to which the control information belongs, and are reproduced simultaneously with the moving image data. Indicates a combination of any one of the audio data to be performed and any one of the sub-picture data to be reproduced simultaneously with the moving image data; Receiving means for receiving an execution instruction, if the execution instruction is received, read out a combination of the audio data and the sub-picture data indicated by the instruction command instructed to execute the held control information. 6. The reproducing method according to claim 5, wherein the moving image data, the audio data, and the sub-video data of the object are reproduced. 7. An object according to claim 1, wherein said object is selectively reproduced from each other, and said control information included in said selectively reproduced object is effective during reproduction of moving image data in said small area to which said object belongs. There, any one of the objects to be selectively reproduced, any one of the audio data to be reproduced simultaneously with the moving image data of the object, and the moving image data of the object are reproduced simultaneously. One or more combinations with any one of the sub-picture data, and the playback device selects and selects any one of the one or more combinations indicated by the held control information. Reading the object indicated by the combination,
6. The reproducing method according to claim 5, wherein the moving image data, the audio data, and the sub-video data of the read object are reproduced according to the selected combination. 8. The control information has one or more command commands, and the command commands are valid during reproduction of the moving image data in the small area to which the control information belongs, and should be selectively reproduced. Any one of the objects, any one of the audio data to be reproduced simultaneously with the moving image data of the object, and any one of the sub-video data to be reproduced simultaneously with the moving image data of the object; The playback device further includes a receiving unit that receives an instruction to execute any one of the command commands of the control information, and if the execution instruction is received, an instruction to execute the held control information is issued. The object indicated by the command command is read, and read in accordance with the combination indicated by the command command. Wherein said moving picture data and the audio data of an object for reproducing the sub-picture data, a method of reproducing the claims 7 Claims. 9. A method for reproducing digital data having one or more objects including moving image data, audio data, and sub-picture data, wherein the objects exist over one or more units, and The unit includes: a first subunit in which data of a predetermined section of the moving image data is arranged; one or more second subunits in which data of a predetermined section of the audio data is arranged; One or more third sub-units in which data is arranged, and a fourth sub-unit in which effective control information is arranged during reproduction of the moving image data in the unit to which the sub-unit belongs. One of the third sub-units stores data to be selectively reproduced from each other, and the control information is reproduced simultaneously with the moving image data. One or more combinations of any one of the audio data to be reproduced and any one of the sub-picture data to be reproduced at the same time as the moving image data are shown. Playing back the audio data and the sub-picture data, holding the control information effective for the moving image data in a predetermined section being played, and any one or more of the one or more combinations indicated by the held control information And reproducing the moving image data, the audio data, and the sub-video data of the read object in accordance with the selected combination.