JP2002245753A - Recording method for recording medium recorded with audio data and sub-video dat of multiple channels together with moving picture data, and reproducing device and reproducing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording method for a recording medium, the reproducing device and the reproducing method by which a plurality of sub-data are easily managed among a plurality pieces of video data. SOLUTION: This method comprises the step of preparing data and the step of recording the prepared data in the recording medium. The data include a plurality pieces of video data and management information. A pieces of moving picture data and a plurality pieces of sub-data to be alternatively reproduced simultaneously therewith are interleaved in each pieces of video data, and an ID is attached to the sub-data. The management information has route information specifying a program chain indicating the video data to be successively reproduced and a table in which the logical number of the sub-data and the ID of the sub-data are made correspond to the video data indicated by the program chain.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording method, a reproducing apparatus and a reproducing method for a recording medium on which multimedia data is recorded, and more particularly to an improvement in a reproducing function in a movie application.

[0002]

2. Description of the Related Art Conventionally, a laser disk and a video CD have been known as an optical information recording medium for recording and reproducing audio information and moving image information and a recording and reproducing apparatus therefor. A laser disk realizes recording of analog moving image data for about one hour on an optical disk having a diameter of about 30 cm, and has been actively used as a recording medium for movies and music videos. However, since the laser disk is not an appropriate size in consideration of portability and storage, a more compact recording medium has been demanded.

[0003] Video CDs have a diameter of 12c, which was originally a disk for audio recording, by recording a moving image having a large data amount by a digital data compression method having a high compression ratio called an MPEG (Moving Picture Experts Group) method.
This realizes recording and reproduction of moving images on a CD (Compact Disc). Video CDs have a compact disk size, but have a video resolution of about 352 x 24
It was only 0 pixels.

However, the above-mentioned laser disk and video CD have the following restrictions on audio and subtitles.
That is, since only one channel of audio information is recorded,
Inability to support multiple languages. Subtitles are recorded as part of the video, so they cannot be translated into multiple languages.
For example, different voices or subtitles such as a Japanese version, an English version, a French version, and a German version cannot be recorded for the same moving image information.

[0005] Further, when there are different versions of a movie such as a movie version, an uncut version, and a TV broadcast version, if the movie is a very short movie, it is possible to record all versions of the movie on one disc. It was impossible to record a movie of about one to two hours on a single disk.
In addition, in the laser disk, monaural 4CH can be recorded as audio information in addition to analog moving image information for about one hour.

[0006] Laser disks are very often used primarily for recording movie applications. However, a normal movie has a show time of about two hours, and there are multiple versions. The multiple versions include a theater release version, a TV broadcast version, and a dubbed version for other languages (audio, subtitles).

[0007]

However, since analog moving picture information that can be recorded on a laser disk (registered trademark) is about one hour, it is not possible to record a plurality of versions of a movie. Further, even if a plurality of short moving image information are recorded and a plurality of audio channels are added to each moving image information and recorded, the following problem occurs.

First, since moving picture information is recorded in duplicate, the recording efficiency becomes extremely poor. Second, since subtitles are recorded as part of a moving image, in order to have a plurality of subtitles, a plurality of pieces of the same moving image information having different subtitles are recorded. Thirdly, in the second case, even when the user wants to change to a video having subtitles in another language while reproducing video information having subtitles in one language,
It is necessary for the user to restart the reproduction from the beginning. That is, even for the same movie, it is not possible to change only the subtitles while continuing the reproduction. Fourth, if the number of audio channels of a plurality of pieces of moving image information is different or the assignment of which sound channel is which language is different, each time the moving image information is changed, the audio channel of the desired language is changed by a user operation. Must be changed.

An object of the present invention is to record a plurality of video data comprising main moving picture data and a plurality of sub-data such as audio and subtitles, and to have a different sub-data channel number and channel assignment for each video data. Another object of the present invention is to provide a recording method for a recording medium capable of easily managing sub data between video data, a reproducing apparatus thereof, and a reproducing method thereof.

[0010]

According to the present invention, there is provided a recording medium recording method comprising the steps of: creating data; and recording the created data on a recording medium. Each video data includes a plurality of video data and management information, and each video data includes moving image data and a plurality of sub-data to be reproduced at the same time in an interleaved arrangement, and the sub-data is accompanied by an ID. , The at least two pieces of video data are different from each other in the number of the interleaved sub data, the sub data is one of audio data and sub video data, and the management information is reproduced in series. Path information specifying a program chain indicating video data to be provided, and a logical number of the sub-data with respect to the video data indicated by the program chain. Serial has a table in which the ID of the sub-data is associated, the logical number is configured to be a number assigned to the common video data indicated by the program chain.

Here, the video data is composed of a plurality of units. Each unit has moving image data in a predetermined time unit and sub data to be reproduced simultaneously with the moving image data, and has different sub data. In addition, control information including a command that is valid during data reproduction in the unit to which the unit belongs and that designates any sub-data to be reproduced simultaneously with moving image data in the unit by a logical number is recorded.

[0012] A reproducing apparatus according to the present invention is a reproducing apparatus for reproducing data recorded on a recording medium, comprising: a reading means for reading data from the recording medium; and a number retaining means for retaining a predetermined logical number. Determining means for determining the ID of the sub-data to be reproduced according to the table read by the reading means, the path information, and the logical number of the number holding means; Selecting means for selecting the sub data having the selected ID, and reproducing means for reproducing the moving image data read by the reading means and the sub data selected by the selecting means.

The video data is composed of a plurality of units. Each unit has moving image data of a predetermined time unit and sub data to be reproduced simultaneously with the moving image data, and has different sub data. , Control information including a command that is valid during data reproduction in the unit to which the subordinate data belongs and is to be reproduced simultaneously with the moving image data in the unit by using a logical number is recorded. Alternatively, the logical number designated by the command in the control information may be held in the holding means.

A reproducing method according to the present invention is a reproducing method for reproducing data recorded on a recording medium, comprising: a reading step for reading data from the recording medium; and a logical number predetermined in a specific register in the reproducing apparatus. A setting step of setting the ID of the sub data to be reproduced according to the table and the path information read by the reading step and the logical number held in the specific register; A selecting step of selecting sub data having the determined ID from the plurality of sub data, and a reproducing step of reproducing the moving image data read by the reading step and the sub data selected by the selecting step.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <Physical Structure of Multimedia Optical Disk> First, a multimedia optical disk (hereinafter referred to as a DVD: Digital Versatile Dis
The physical structure of k) will be described. FIG. 1 is a diagram showing the appearance, cross section, enlarged cross section, and pit shape of a DVD in this embodiment.

In the external view of FIG.
It is about 12 cm like D. In the sectional view of FIG.
The VD 107 includes a first transparent substrate 108 having a thickness of 0.6 mm from the lower side of the drawing, an information layer 109 on which a reflective film such as a metal thin film is adhered, a second transparent substrate 111, and an information layer 109.
An adhesive layer 110 is provided between the first transparent substrate 111 and the second transparent substrate 111 to bond the two, and a printing layer 112 for printing a label is provided on the second transparent substrate 111 as needed.

The printing layer 112 is not essential for the DVD 107. If it is not necessary, the printing layer 112 may not be provided and the second transparent substrate 111 may be exposed. In FIG. 1, the lower surface on which the light beam 113 for reproduction is incident and information is reproduced 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 of the first transparent substrate 108 which is in contact with the information layer 109 by a molding technique, and information is recorded by changing the length and interval of the pits. In other words, the pits on the second transparent substrate 108 are transferred to the information layer 109. Like the pit shape in the figure, each pit has a length of 0.4 μm to 2.13 μm, and is spirally arranged at intervals of 0.74 μm in the radial direction to form one spiral track. . The length of the pits is shorter than that of a conventional CD, and the track pitch, which is the pitch of the information tracks formed by the pit row, is configured to be narrow, thereby improving the areal recording density.

The surface A of the first transparent substrate 108 where no pits are formed is a flat surface. The second transparent substrate is used for reinforcement and is the same material as the first transparent substrate 108 and has the same thickness of 0.6 mm and is a flat transparent substrate on both sides. Then, a light beam 113 from an optical head (not shown) is irradiated from the surface A shown below and converges on the information layer 109 to form a light spot 114.
An image is formed on the information layer 109, and the phase of the reflected light is different from that of the surroundings in a portion having a pit, so that optical interference occurs and the reflectance is reduced. As a result, the information is reproduced as a change in reflectance. Further, since the light spot 114 of the DVD 107 has a large NA and a small λ, the light spot 114 is about 1 / 1.6 in diameter as compared with the light spot of the CD. This has a recording capacity of about 4.7 GB, which is about eight times that of a CD. <Data Structure of Entire DVD> Next, the entire data structure stored in the DVD will be described.

FIG. 2 is an overall data structure diagram of the DVD. A DVD has a lead-in area, a volume area, and a lead-out area, which are roughly divided from the center of the disk to the outer periphery on one spiral track. In the “lead-in area”, data for stabilizing operation at the start of reading of the disk reproducing device and the like are recorded.

The "lead-out area" is an area for indicating the end of recorded information to the disc reproducing apparatus. The “volume area” is an area for recording various data constituting an application, and is physically composed of an extremely large number of logical blocks (also called sectors) as a one-dimensional array on a spiral track. Each logical block is 2k
It is a byte and is distinguished by a block number (sector address). This logical block size is the minimum read unit by the playback device.

This volume area further comprises a volume management area and a file area. The “volume management area” is secured from the first block by the number of blocks necessary for managing the entire disk.
onal Standards Organizaition) 13346 and other file names,
Information indicating the correspondence with the address of the logical block group occupied by each file is recorded.

In the "file area", at least one video title set and a video manager are recorded. In this embodiment, both the video title set and the video manager are each treated as one file for convenience of explanation, but are actually divided into a plurality of files on a track and recorded. This is because, for example, when storing a movie, the file capacity becomes too large, and it is desirable to divide and record a plurality of continuous files in order to facilitate management in the playback device.

Each "video title set" is used for recording an individual title set. Specifically, a plurality of video objects (hereinafter referred to as VOs) representing partial moving images, sounds, and still images of an application such as an interactive movie.
B) and information for controlling the reproduction thereof. Here, for example, when there are three versions of the same movie, such as an uncut version, a theater release version, and a television broadcast version, the title set is a generic name of three titles for each version. Although there are multiple versions of the same movie due to the show's performance or public order and morals,
Producers were strongly required to record multiple versions of a movie on a single disc. To achieve this, in this embodiment, each version of the movie is
This is realized by a combination of OBs. In this case, there are VOBs that can be shared between titles of different versions and individual VOBs that cannot be shared. The video title set includes the VOB of the shared part and the VO of each version.
B is recorded.

A plurality of video title sets can be recorded so as to record not only movies but also a plurality of interactive applications such as interactive movies for the first time because of the huge recording capacity of about 4.7 Gbytes of DVD. It is realized. The “video manager” is for managing a title set of the entire disc, and specifically records a plurality of VOBs and information for controlling their reproduction. The data structure of the video manager is similar to that of the video title set, except that it is used for a special purpose. That is, the video manager is used to manage the title set of the entire disc. Therefore, the VOB (group) for the system menu is recorded in the video manager. The system menu is a menu that is played back immediately after the power of the playback device is turned on, or is called up temporarily during playback of a title and played back, and allows a user to select a desired title set and to select a plurality of audio channels and sub-video data. Menu for setting / changing the channel to be reproduced. <Data Structure of Video Title Set (Part 1)> FIG.
Shows the internal structure of each video title set in FIG. As shown in the figure, the video title set includes a VOB set including a plurality of VOBs and video title set management information for controlling a reproduction path of the VOB set.

The "VOB set" is composed of all VOBs that are elements of the title set, that is, VOBs that are shared by a plurality of titles, and VOBs that are individual parts of the title. Each "VOB" is a GOP (Group Of Picture)
Moving image data (video) in a predetermined time unit, a plurality of audio data to be reproduced simultaneously with the moving image, a plurality of sub-picture data to be reproduced simultaneously with the moving image, and a management pack for managing these And are interleaved. One management pack as shown in the figure,
A portion including moving image data corresponding to a GOP, a plurality of audio data, and a plurality of sub-picture data is stored in a VOB unit (VOB U
nit). The plurality of audio data and the plurality of sub-picture data are selectively reproduced by the reproducing device.

"Audio A", "Audio B", "Audio
A plurality of audio data such as "C" can record voices in a plurality of different languages, such as Japanese and English, or can record male voices and female voices. Also, a plurality of sub-picture data such as “SP A” and “SP B” in the same drawing are still images multiplexed and displayed on a moving image, and can record, for example, subtitles in a plurality of different languages. In addition to subtitles, menus are a more important use of sub-picture data. That is, one or several sub-picture data are
It is used to record menu images in interactive applications and system menus.

The management pack is 2 Kbytes in size, and stores information for managing data for each VOBU.
This includes highlight information for controlling button display and menu operation in a menu image of sub-picture data. The highlight information realizes interactivity in VOBU units in combination with the menu image based on the sub-picture data. <Data structure of VOB>
FIG. 4 is an explanatory diagram of a more detailed data structure of the VOB. FIG. 1 also shows how the materials are interleaved and multiplexed together with the materials before being multiplexed by interleaving and the VOBs after being multiplexed.

Elementary streams (1) to (6) in FIG.
Are material examples before being multiplexed to form a VOB. Elementary stream (1) is MP
Video data compressed according to the EG2 standard.
Interleaved multiplexing is performed on VOBUs in OP units. Here, the GOP is about 0.2 including at least one I picture.
This is compressed moving image data for 5 seconds. One GOP is recorded in one VOBU.

The elementary streams (2) to (4) are audio data (audio A to audio) respectively corresponding to the moving image data.
C channel). In each audio channel, a portion substantially corresponding to the GOP of the moving image data in time is recorded in the same VOBU as the moving image data. Elementary stream
(5) and (6) are sub-video data (sub-video A and B channels) respectively corresponding to the moving image data. In each sub-picture data, a portion temporally corresponding to the GOP of the moving image data is:
It is recorded in the same VOBU as the moving image data.

FIG. 5 shows a specific example of a VOB in which the numbers of channels of audio data and sub-picture data are different. VOB # 1 in the drawing is an example in which the following three types of audio and four types of sub-video are interleavedly recorded for one moving image. video1001, video1002, ...: Video data audio A1001, audio A1002, ...: English audio audio B1001, audio B1002, ...: Japanese audio audio C1001, audio C1002, ...: French audio SP A1001, SP A1002, ...: English subtitle SP B1001, SP B1002, ...: English subtitles (for hearing impaired) SP C1001, SP C1002, ...: Japanese subtitles SP D1001, SP D1002, ...: Japanese subtitles (for hearing impaired) This VOB # 1 is, for example, a TV broadcast version , Which includes audio in three languages and subtitles in two languages. The subtitle for the hearing impaired is a subtitle that also displays the sound effects of the movie. For example, "I can hear the knocking on the door", "The window is sounding violently due to a storm".

Similarly, VOB # 2 is an example in which English sound and English subtitles are interleavedly recorded for one moving image. The VOB # 2 is a portion that exists only in, for example, a movie of the uncut version. VOB # 3 is 1
This is an example in which English audio, Japanese audio, English subtitles, and Japanese subtitles are interleavedly recorded for one moving image.
This VOB # 3 is, for example, a title part of a theater release version, but is a part cut off in TV broadcasting.

VOB # 4 has the same number of audio and sub-pictures as VOB # 1. Furthermore, "video
1001 '', `` audio A1001 '', `` audio B1001 '' ... `` SP A10
Actually, portions shown as "01" and "SP B1001" are recorded in a form of a set of a plurality of packs each having a size of 2 Kbytes. For example, the “video 1” portion is recorded as a set of a plurality of packs corresponding to one GOP. The reason for packing in this way is D
This is because the size is the same as a logical block (sector) having a size of 2 Kbytes in the VD, and is the minimum read unit by the reproducing apparatus. <Data Format of Each Pack> A more detailed data format of each pack and management packs constituting the moving image data, audio data, and sub-picture data in the VOBU will be described.

Each of the packs shown in FIGS. 6 to 9 has a PES (Pa
The packet includes one packet called a "cketized Elementary Stream" packet, and is composed of a pack header, a packet header, and a data field, and has a size of 2 Kbytes.
MP for "pack header" and "packet header"
The description of points conforming to EG2 is omitted, and here, information for identifying each pack type will be described. In this embodiment, a private packet 1 in MPEG2 for identifying audio data, sub-picture data and a management pack,
A special packet called No. 2 is used. here,
The private packet is a packet whose contents may be freely defined. In this embodiment, the private packet 1 is defined as audio data and sub-picture data, and the private packet 2 is defined as a management pack. ing.

FIG. 6 shows a data format of a pack (hereinafter referred to as a video pack) which is a component such as "video 1" in FIG. The video pack has a pack header,
It consists of a packet header and a data field that carries a part of the GOP. Among them, the stream ID (for example, 1110 0000) in the packet header means that it is a video pack.

FIG. 7 shows a data format of a pack (hereinafter referred to as an audio pack) which is a component such as "audio A-1" in FIG. An audio pack includes a pack header, a packet header, and a data field in which audio data is placed. The stream ID (1011 1101) in the packet header is the private packet 1
It means that Furthermore, the upper 5 bits of the substream ID (10100XXX or 1000XXX in the figure) in the data field indicate that the data is audio data and its encoding method, and the lower 3 bits indicate which channel it is. Therefore, up to eight audio channels are recorded on the present optical disc. In this embodiment, the audio channels 0 to 7 distinguished by the lower three bits of the substream ID are hereinafter referred to as audio physical channels 0 to 7.

FIG. 8 shows the data format of a pack (hereinafter referred to as a sub-picture pack) which is a component such as "SP A-1" in FIG. The sub-picture pack includes a pack header, a packet header, and a data field in which image data is placed. The stream I in the packet header
D (1011 1101) means that it is a private packet 1. Furthermore, the upper 3 bits of the substream ID (001XXXXX in FIG. 3) in the data field mean that the video data is sub-picture data, and the lower 5 bits indicate which channel it is. Therefore, a maximum of 32 sub-video channels are recorded on this optical disc. Sub-video channels 0 to 31 distinguished by the lower 5 bits of the sub-stream ID are hereinafter referred to as a sub-video physical channel (or SP
Physical channels) 0 to 31. The sub video physical channel and audio physical channel are names for distinguishing from the sub video logical channel and the audio logical channel. The logical channel and the physical channel are mapped one-to-one or many-to-one in the playback device.

FIG. 9 shows the data format of the management pack shown in FIG. The management pack consists of a pack header, a PCI packet (Presentation Control Information Packe
t), DSI packet (Data Search Information Packe)
t). Among them, the stream ID (1011 1111) in the packet header means that the packet is the private packet 2. Further, the sub-stream ID (0000 0000) in the data field means a PCI packet, and the sub-stream ID (0000 0001) means a DSI packet.

In the DSI packet, information for managing synchronization between moving picture information and audio information and information for realizing special reproduction such as fast forward and rewind reproduction are recorded.
These pieces of information include return address information indicating the start position of the VOBU including the head of the sub-video data when the menu image based on the sub-video data is recorded over a plurality of VOBUs. The return address to the sub-picture is such that when the "menu" key on the remote control is pressed by a user operation during application reproduction, the video manager jumps to the system menu to switch the stream of audio and sub-picture. After that, it is used to restart the reproduction of the application again.

Highlight information for realizing user interaction is recorded in the PCI packet. The highlight information is control information for responding to a user operation when a menu image is reproduced by sub-video data in the same VOBU. Here, the user operation is an input operation using a cursor key, a numeric keypad, an enter key, or the like on a remote controller of the playback device.

The highlight information will be described more specifically with reference to a menu image example shown in FIG. FIG. 10 illustrates menu images M101 to M102 in the system menu and the title menu. For example, the menu image M101 represents three menu items (0 movie A, 1 movie B, and 2 games). The highlight information for the menu image M101 includes control information indicating that there are three buttons, a selected color and a confirmed color of each button, a command to be executed when each button is confirmed, and the like. The same applies to the other menu images M102 to M106. <Data Structure of Management Pack> FIG. 11 is a diagram hierarchically showing a more detailed data structure of the management pack. As shown in FIG. 9, the management pack includes PCI and DSI. As described above, the PCI includes highlight information. <Schematic Data Structure of Highlight Information>
The highlight information in the CI includes general highlight information on general highlight display, button color information for changing the display color of a button in a menu, and button information for defining the content of each button. Here, the highlight display means that, for each button in the menu image, a button in a selected state and a confirmed state is displayed so as to be distinguished from other buttons. As a result, a menu display according to the operation status of the user is realized. <Detailed Data Structure of Highlight General Information> In the drawing, highlight general information includes a highlight state, a highlight start time, a highlight end time, a button selection end time,
It consists of the total number of buttons and the number of forced selection buttons.

The "highlight state" is a video display section (VOBU) of about 0.5 seconds targeted by the PCI packet.
Indicates the state of the highlight information, such as whether or not a button exists and, if so, whether or not the button has the same content as the highlight information of the previous PCI packet. For example, the highlight state is represented by the following two bits. Highlighted state "00": There are no buttons on the menu in the video display section by this VOBU. Highlighted state "01": There is a new button. Highlighted state "10": Same button as the previous VOBU. Highlight state "11": Same button as the previous VOBU except for the highlight command.

The "highlight start time", "highlight end time", and "button selection end time" indicate the start and end of highlight display and the final time at which a button can be selected, respectively. These times start from the start of the reproduction of the VOB. In the playback device, a system time starting from the start of playback of the VOB is counted as a reference clock for the entire playback operation. With these times, the playback device can synchronize the display of the menu image with the sub-picture data and the highlight display of the menu image.

"Total number of buttons" indicates the number of buttons used among the maximum 36 buttons. Each button is assigned a button number from 1 to the total number of buttons. “Forced selection button number” indicates an initial selection button at the time when highlighting is started. When the compulsory selection button number is 63, it indicates that there is no initial compulsory button. In that case, the selection button number stored inside the playback device is used. <Detailed Data Structure of Button Color Information> FIG. 12 is a diagram showing a more detailed data structure of button color information and button information.

The button color information includes button color 1 information, button color 2 information, and button color 3 information, and three types of button color groups are prepared for buttons on the menu. One of three types is designated for each button. In the present embodiment, the maximum number of buttons that can be used is 36, but it is redundant to assign different color changes to all buttons, so each button specifies one of three types. .

Each of the button color 1 to 3 information includes selected color information and fixed color information. The selection color information is information indicating a color to be colored when a button is selected by an arrow key or the like (in a selected state). The determined color information is information indicating a color to be generated when a button in a selected state is determined. <Detailed Data Structure of Button Information> As shown in FIG. 12, the button information is information for a maximum of 36 buttons of the button 1 to 36 information. Hereinafter, each of the button 1 to 36 information is referred to as button n information.

The button n information includes button position information, adjacent button information, and a button command. The “button position information” includes a button color number specifying which one of the button colors 1 to 3 is to be used, and a coordinate area (highlight area) indicating the button position on the menu image.

The "adjacent button information" is information indicating other button numbers which are present above, below, right and left of the button in the menu image. Thereby, it is possible to realize the movement of the button selection by the user's arrow key operation. In the “button command”, a command to be executed when the button is set to a fixed state is recorded. The command is a command for controlling playback of the playback device, and includes, for example, a command for instructing branching and a command for designating which of a plurality of audio channels and sub-video channels to play. <Details of Button Command> FIG. 13 is a diagram showing a specific example of a command used as a button command set for each button in the button information. Each instruction consists of an operation code and an operand. Some instructions require more than one operand.

In the figure, a SetSTN instruction specifies an audio logical channel number, a sub-video logical channel number, and an SP flag as operands, and instructs the reproducing apparatus to reproduce the audio and sub-video of the specified logical channel. The SP flag is a flag for designating whether or not to display and output the sub video data. The logical channel number specified by this instruction is set in a register in the playback device and is converted to a physical channel number. In the reproducing device, the physical channel is reproduced. This command is used for initial setting of the audio logical channel and sub-video logical channel to be reproduced in the title menu, etc., and is used for dynamically changing the audio logical channel and the sub-video logical channel during the reproduction of the title. You.

The Link instruction instructs branch reproduction to a program chain (hereinafter abbreviated as PGC) specified by an operand. Here, the program chain (PGC) refers to a sequence of VOBs or a reproduction path to be reproduced in a predetermined series. Details of the PGC will be described later. CmpReg
The Link instruction specifies a register number, an integer value, a branch condition, and a branch destination PGC number as operands, and instructs to branch to the PGC only when the value of the register satisfies the branch condition for the integer value. I do. The branch condition is = (match),> (large), <(small), and the like.

The SetRegLink instruction includes, as operands, a register number, an integer value, an operation content, and a branch destination PG.
A C number is specified, and a value obtained by calculating the value of the register and the integer value is stored in the register, and then the branch to the PGC is instructed. Here, the operands indicating the operation contents are: = (assignment), + (addition),-(subtraction), * (multiplication), / (division), MOD (residual remainder), AND (logical product), OR
(OR), XOR (Exclusive OR), and the like.

The SetReg instruction has, as operands,
A register number, an integer value, and an operation content are specified, and an instruction is given to store a value obtained by calculating the value of the register and the integer value in the register. Here, the operand indicating the operation content is the same as the above-mentioned SetRegLink instruction. <Data Structure of Video Title Set (No. 2)> Next, video title set management information for controlling the playback path of the VOB among the individual video title sets will be described.

FIG. 14 is a diagram hierarchically showing the data structure of the video title set management information in each video title set in FIG. Hereinafter, the layers in the figure are referred to as first to fifth layers in order from the left. The first layer in FIG.
Is as described above. As shown in the second layer of the figure, the video title set management information includes a video title set management table, a title search pointer table, and a PGC information management table.

"Video title set management table"
Is header information of this video title set, and P
A pointer indicating the storage position of the GC information management table or the title search pointer table is recorded. The “title search pointer table” is an index of a plurality of PGCs stored in the PGC information management table, and records a pointer to a storage position of PGC information to be executed first for each title. For example, a pointer indicating the storage position of PGC information indicating the head PGC of the interactive movie is recorded.

The “PGC information management table” stores an arbitrary VOB from a plurality of VOBs recorded in a video title set.
This is a table for allowing OBs to be combined and played back in an arbitrary order, and is managed in units of PGCs in which a plurality of VOBs are combined in an arbitrary order. This PG
FIG. 16 is an explanatory diagram of C. It is assumed that VOBs # 1 to # 4 shown in FIG. 16 are included in the video title set. PGC # 1 in the figure is VOB # 1 → VOB # 2 →
A playback path of VOB # 3 → VOB # 4 is shown.
PGC # 2 indicates a playback path of VOB # 1 → VOB # 3 → VOB # 4. PGC # 3 is VOB # 1
→ shows a reproduction path of VOB # 4. To realize this, as shown in the third hierarchy of FIG. 14, the PGC information management table includes a plurality of PGC information # 1 to #m.
Each PGC information is composed of one PGC (VOB path)
And the PGC to be reproduced next, and the correspondence between the logical channels and the physical channels of the audio and sub-video.

As shown in the fourth layer of FIG. 14, each piece of PGC information is composed of an audio channel table, a sub-picture channel table, PGC connection information, a pre-processing command group, a post-processing command group, and path information. The “path information” includes position information of a plurality of VOBs, as shown in the fifth hierarchy, and is arranged in the order of reproduction. For example, the path information of PGC # 1 in FIG. 16 includes four pieces of position information of VOB # 1, # 2, # 3, and # 4. This position information includes the logical address of the first sector of the VOB and the total number of sectors occupied by the VOB.

The "post-processing command group" indicates a command to be executed after the PGC is reproduced. This command is
3, that is, a command used as a button command in the highlight information can be set. For example, in order to conditionally branch from PGC # 1 to another PGC in FIG.
The gLink instruction may be set.

The "pre-processing command group" indicates a command to be executed before the start of the PGC reproduction. This command can also set the command shown in FIG. For example, S
It can be used to set an initial value in a register by an etReg instruction or the like. “PGC connection information” indicates the number of one PGC to be reproduced next. However, when a branch is made by a branch instruction (CmpRegLink, etc.) in the post-processing command group, it is ignored.

"Audio channel table (hereinafter, audio CH)
The table is abbreviated to a table), which indicates the correspondence between the audio logical channel and the audio physical channel in the PGC, and the audio logical channel permitted to be reproduced. The voice logical channel and the number here are channel numbers used for uniformly handling the channel number among a plurality of PGCs. This table stores a plurality of Vs as elements of the PGC.
This is provided to ensure continuity of audio reproduction between VOBs, such as when the number of audio physical channels differs between OBs, or when the assignment of physical channel numbers differs even if the number of audio physical channels is the same. For example, P shown in FIG.
Assuming that Japanese voice is currently selected and reproduced in VOB # 1 in GC # 1, the next VOB # 2
In this case, there is a problem that a voice cannot be output because there is no Japanese voice. Also, VOB # 1 and VOB # 2
Assuming that the physical channel numbers of the English voices are different from each other, there may be a problem that a different language is reproduced when the reproduction is shifted from VOB # 1 to VOB # 2.
The audio channel table solves these drawbacks.

"Sub-picture channel table (hereinafter, SPC)
H table is abbreviated as the audio channel table. <Structure of Audio and Sub-Video Channel Table> FIG. 15 shows a more detailed data structure of the audio CH table and the SPCH table shown in the fourth hierarchy of FIG.

As shown in the figure, the audio CH table is made to correspond to each of the audio logical channels 0 to 7 from the top,
A permission flag indicating permission / prohibition of the reproduction and a sound ID indicating a sound physical channel are recorded. If the permission flag is set, reproduction of the audio physical channel is permitted,
It is prohibited if reset. The audio ID is an ID for identifying an audio physical channel, and specifically,
8 illustrates a substream ID in the audio pack illustrated in FIG. 7 or lower three bits of the substream ID.

The SPCH table records a permission flag indicating refusal of reproduction and a sub-picture ID indicating a sub-picture physical channel corresponding to each of the sub-picture logical channels 0 to 31 in order from the top. If the permission flag is set, the reproduction of the sub-video physical channel is permitted, and if the permission flag is reset, the reproduction is prohibited. The sub-picture ID is an ID for identifying an audio physical channel, and specifically,
9 illustrates a sub-stream ID in the sub-picture pack illustrated in FIG. 8 or lower 5 bits of the sub-stream ID.

Since the audio CH table and the SPCH table are set for each PGC, the title creator can map a logical channel to an arbitrary physical channel for each PGC. FIG. 17 shows a specific example of the audio CH table and the sub-picture CH table. FIG.
3 shows a part of the audio CH table and the sub-picture CH table in the PGC information corresponding to each of the PGCs # 1 to # 3.

The route information of the PGC information # 1 in FIG.
Position information of OBs # 1, # 2, # 3, and # 4 is recorded. This represents the playback path of PGC # 1 in FIG. The audio CH table of the PGC information # 1 indicates that the audio logical channels 0, 1 and 2 are both audio physical channels 0 (audio ID =
0). Further, only the permission flag of the audio logical channel 0 is 1, and the permission flags of the audio logical channels 1 and 2 are 0. Therefore, this audio CH table is set so that only audio physical channel 0 (English audio) is reproduced and other audio physical channels are not reproduced during reproduction of PGC # 1. For this reason,
Even when switching of the audio logical channel is requested by the user during the reproduction of the PGC # 1, the reproduction of the audio logical channel other than the audio logical channel 0 for which the reproduction is permitted is prohibited.

The sub-picture CH table of the PGC information # 1 is
Sub-video logical channels 0, 1 and 2 are both sub-video physical channels 0
(Sub-image ID = 0). Further, only the permission flag of the sub-video logical channel 0 is “1”. According to this audio CH table, while PGC # 1 is being reproduced, only audio physical channel 0 is reproduced,
Other audio physical channels are not played. This sub-picture CH
The table shows that only the sub-video physical channel 0 (English subtitles) can be reproduced during the reproduction of PGC # 1 shown in FIG.
The other sub-picture physical channels are set so as not to be reproduced.

Further, the position information of VOBs # 1, # 3 and # 4 is recorded in the path information of the PGC information # 2 in FIG. This represents the playback path of PGC # 2 in FIG. Audio CH table and sub-picture CH of PGC information # 2
The table shows that during playback of PGC # 2, audio physical channel 0 (English audio), 1 (Japanese audio), sub-video physical channel 0 (English subtitles), and sub-video physical channel 2 (Japanese subtitles) can be reproduced. Is set to be.

The path information of the PGC information # 3 in FIG.
Position information of VOBs # 1 and # 4 is recorded. This represents the playback path of PGC # 3 in FIG. The audio CH table and sub-picture CH table of the PGC information # 3 are:
During playback of PGC # 3, audio physical channel 0 (English audio), 1 (Japanese audio), 2 (French audio), sub-video physical channel 0 (English subtitles), 1 (for hearing-impaired persons with English subtitles),
It is set so that 2 (Japanese subtitles) and 3 (for Japanese hearing impaired persons) can be reproduced.

As described above, the audio CH table and the sub-picture C
The H table adjusts the difference in the number of channels well when VOBs having different numbers of channels are shared like the above-mentioned PGCs # 1, # 2, and # 3. Specifically, according to the audio CH table and the sub-picture CH table, when the number of physical channels is different, a logical channel can be mapped to an existing physical channel, and when the assignment of the physical channel is different, The difference in assignment can be absorbed. Also, the reproduction of the desired logical channel can be prohibited by the permission flag.

The data structure of the optical disk has been described above, and then the reproducing apparatus will be described. <External Appearance of Reproducing System> FIG. 18 is an external view of a reproducing system including a reproducing apparatus, a monitor, and a remote controller in this embodiment.

In the figure, the playback device 1 is
1 according to an operation instruction from the optical disk (DV
D), 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. <Appearance of Remote Controller> FIG. 19 shows an example of the key arrangement of the remote controller 91. Here, keys related to the present invention will be described. The "menu" key is used to call a system menu by the video manager when playing any title such as an interactive movie. The “ten” key and the “direction (arrow)” key are for selecting menu items. The "Enter" key is for confirming the selected menu item. The “voice switch” key is for switching a voice channel. The “sub-picture switching” key is for switching a sub-picture channel. Other keys are the same as those of other AV devices. <Overall Configuration of Reproducing Apparatus> FIG. 20 shows the reproducing apparatus 1 shown in FIG.
FIG. 2 is a block diagram showing the entire configuration of the embodiment. The playback device 1 includes a motor 81, an optical pickup 82, a mechanism control unit 83, a signal processing unit 84, an AV decoder unit 85, a remote control receiving unit 9
2. It is composed of a system control unit 93. The AV decoder unit 85 further includes a system decoder 86, a video decoder 87, a sub-picture decoder 88, and an audio decoder 8.
9, the image synthesizing unit 90.

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

The signal processing section 84 amplifies the signal read from the optical pickup 82, shapes the waveform, binarizes the signal, demodulates the signal,
After processing such as error correction, the data is stored in a buffer memory (not shown) in the system control unit 93. Of the data in the buffer memory, the video title set management information is held in the system control unit 93, and the VOB is stored in the system control unit 93.
Is further transferred from the buffer memory to the system decoder 86.

The AV decoder 85 outputs the signal-processed V
OB is converted into an original video signal or audio signal. The system decoder 86 determines a stream ID and a sub-stream ID for each logical block (pack) included in the VOB transferred from the buffer memory, and outputs video data to the video decoder 87, audio data to the audio decoder 89, and The video data is output to the sub video decoder 88, and the management pack is output to the system control unit 93. At this time, the system decoder 86 sends the audio data and sub-picture data of the number (channel) designated by the system control unit 93 from the plurality of audio data and the plurality of sub-picture data to the audio decoder 89 and the sub-picture decoder 88. Output each and discard the data other than that number.

The video decoder 87 decodes and decompresses the video data input from the system decoder 86 and outputs it to the video synthesizing section 90 as a digital video signal. When the sub-picture data input from the system decoder 86 is run-length compressed image data, the sub-picture decoder 88 decodes and decompresses the data, and outputs the decoded data to the picture synthesizing section 90 in the same format as the video signal. .

The audio decoder 89 decodes and decompresses the audio data input from the system decoder 86 and outputs it as a digital audio signal. The video synthesizing section 90 outputs a video signal obtained by mixing the output of the video decoder 87 and the output of the sub-video decoder 88 at a ratio specified by the system control section 93. This signal is converted into an analog signal and then input to a display device.
<Structure of System Decoder> FIG. 21 is a block diagram showing a structure of system decoder 86 in FIG.
As shown in the figure, the system decoder 86 includes an MPEG decoder 120, a sub-picture / audio separation unit 121, a sub-picture selection unit 122, and an audio selection unit 123.

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

The sub-picture / audio separation unit 121
With respect to the private packet 1 input from the EG decoder 120, the type of the packet is determined by referring to the substream ID in the pack. The data is output to 123. as a result,
The sub video data of all numbers and all audio data are output to the sub video selection unit 122 and the audio selection unit 123.

The sub-picture selecting section 122 outputs to the sub-picture decoder 88 only the sub-picture data of the sub-picture ID specified by the system control section 93 among the sub-picture data from the sub-picture / audio separating section 121. Instructed sub-picture ID
Sub-picture data other than are discarded. Audio selection unit 1
The audio decoder 8 converts only the audio data of the audio ID designated by the system control unit 93 from the MPEG audio from the MPEG decoder 120 and the audio data from the sub-picture / audio separation unit 121.
9 is output. Audio data other than the designated voice ID is discarded. <Structure of System Control Unit> FIG. 22 is a block diagram showing the structure of the system control unit 93 in FIG.

The system control unit 93 includes a button control unit 93
0, system state management unit 935, command interpretation execution unit 9
36, a playback control unit 937, and a remote control input interpretation unit 938. Further, the system state management unit 935 includes:
PGC information buffer 935a, register set 935
b, an audio channel determination unit 935c and a sub-video channel determination unit 935d.

The button control unit 930 has a buffer for holding a management pack input from the system decoder 86, accepts a user's key operation on a menu via the remote control input interpretation unit 938, and according to highlight information in the buffer. The sub-picture decoder 88 manages the buttons in the selected state and the confirmed state in the menu, and controls the sub-picture decoder 88 so as to be highlighted.

The system state management unit 935 has a buffer (not shown) for temporarily holding digital data input from the signal processing unit 84, and a part of this buffer is
It is secured as a PGC information buffer 935a that holds C information. When the digital data input to the buffer is a VOB, the system state management unit 935 transfers the digital data to the system decoder 86, and stores the PGC information in the PGC information buffer 935a.

The register set 935b includes a plurality of registers (32 32-bit registers R0 to R31 in this embodiment). The register set 935b is
Includes general purpose registers and dedicated registers. Register R8 ~
R11 is a dedicated register that holds the audio channel currently being reproduced and the respective logical channel numbers and physical channel numbers of the sub-picture data.

FIG. 23 shows bit assignment of data held in registers R8 to R11. As shown in FIG.
The audio logical channel number is held in the lower three bits D2-D0. R9 holds the sub-picture logical channel number in the lower 5 bits D4-D0. R10 holds the audio physical channel number (audio ID) in lower 8 bits D8-D0. This voice I
D is the value of the substream ID of the audio pack shown in FIG. 7 and is output to the audio selection unit 123.

R11 holds the SP display flag in the most significant bit D32 and the audio physical channel number (sub-picture ID) in the lower eight bits D8-D0. This sub-picture ID is the value of the sub-stream ID of the sub-picture pack shown in FIG.
Output to sub-picture selection section 122. The SP display flag indicates to the sub-picture decoder 88 whether the sub-picture display is on or off.
Specify off.

When the PGC information in the PGC information buffer 935a is updated, the remote controller input interpreter 938 notifies the user that the "audio switch" key has been pressed, the audio channel determiner 935c issues a command from the command interpreter 936 to SetS.
When the execution of the TN instruction is instructed, the audio physical channel number (audio ID) to be reproduced is determined by referring to the audio CH table held in the PGC information buffer 935a and the audio logical channel number of the register R8. . If there is a change due to the determination, the voice logical channel number of the register R8 and the voice ID of the register R10 are updated.

The sub-video channel determination section 935d determines whether the PGC
When the PGC information in the information buffer 935a is updated,
When the remote controller input interpretation unit 938 notifies the user of pressing the “sub-image switching” key, and when the command interpretation execution unit 936 instructs execution of the SetSTN instruction, the sub-image CH table held in the PGC information buffer 935a , The sub-picture physical channel number (sub-picture ID) to be reproduced with reference to the sub-picture logical channel number in the register R9.
To determine. Further, if there is a change, register R9
, And the sub-picture ID of the register R11.

The command interpretation / execution unit 936 refers to the PGC information buffer 935a, executes a command of a pre-processing command group immediately before the start of PGC playback, and executes a command of a post-processing command group immediately after PGC playback. The button command notified from the button control unit 930 is executed during the reproduction of the VOB. The reproduction control unit 937 interprets and executes the key input data from the remote control input interpretation unit 938, and controls the mechanism control unit 83, the signal processing unit 84, and others.

Remote control input interpreting section 938 receives a key code indicating a key input from remote control receiving section 92,
It notifies the system state management unit 935 and the reproduction control unit 937. <Detailed Configuration of Sub-Video Decoder> FIG. 24 is a block diagram showing a detailed configuration of sub-video decoder 88. As shown in the figure, the sub video decoder 88 includes an input buffer 881, a sub video code generation unit 882, a sub video display control unit 883, a sub video code conversion table 884, and a compressed video signal generation unit 8.
85, a highlight code conversion table 886, a highlight area management section 887, and a sub-picture signal generation section 888.

The input buffer 881 holds the sub-picture data of the channel selected by the sub-picture selection unit 122 in the system decoder 86. Sub-picture code generation unit 882
Converts image data in a run-length-compressed input buffer into bitmap data in which each pixel is represented by a 2-bit code.

The sub-picture display control section 883 performs image processing such as display start and end of the image data, color change when using karaoke, and the sub-picture code conversion table 884 based on the color information recorded in the sub-picture data. Generate. The compressed video signal generation unit 885 refers to the sub-video code conversion table 884 for the sub-video portion and the highlight code conversion table 8 for the 2-bit code for each pixel output from the sub-video code generation unit 882.
86, a 4-bit 16-color code is generated.

The highlight code conversion table 886 is
5 is a color conversion table from a 2-bit code to a 4-bit code of a highlight portion, which is a partial area of image data. The highlight area management unit 887 stores the start XY coordinates and the end XY coordinates of the highlighted rectangular area, and prepares for reading by the compressed video signal generation unit 885. The sub-video signal generation unit 888 converts a 16-bit code of 4 bits per pixel output from the compressed video signal generation unit 885 into 24-bit data of about 16 million colors using a mapping table (not shown). <Schematic Process Flow of Reproduction Control by System Control Unit 93> FIG. 25 is a flowchart showing a schematic process of reproduction control by the system control unit 93 in FIG.

First, when the system control section 93 detects that the disc has been set in the playback apparatus, the system control section 93 controls the mechanism control section 83 and the signal processing section 84 to control the disc rotation until stable reading is performed. Then, when it becomes stable, the optical pickup is moved to read the lead-in area first. Thereafter, the volume management area is read out, and the video manager shown in FIG.
22), the PGC group for the system menu is reproduced (step 123).

In accordance with the user operation in the system menu, the system control unit 93 reproduces the PGC for the title menu in the selected video title set (step 124), and based on the user's selection (step 125), the selected PGC is selected. The video title set management information corresponding to the title is read (step 126),
Branch to the PGC at the head of the title (step 12
7). Further, the PGC group is reproduced, and when the reproduction is completed, the process returns to step 124 (step 128). <Reproduction process flow of program chain group> FIG.
26 is a detailed flowchart of a process of reproducing a program chain group in step 128 in FIG. The same applies to steps 123 and 124 in FIG.

In FIG. 26, first, the system control unit 9
3 is the corresponding P from the video title set management information.
The GC information is read (step 131). This PGC information is stored in the PGC information buffer 935a. Next, according to the PGC information in the PGC information buffer 935a,
Initial setting including execution of the pre-processing command group is performed (step 132). By executing the preprocessing command group, for example, setting of an initial value of a register is performed.

Next, the position information specified in the path information in the PGC information buffer 935a is sequentially taken out, and
Reproduction control of each VOB # i (i is 1 to n) is performed (step 133). Specifically, the system control unit 93 controls the mechanism control unit 8 according to the position information set in the route information.
3 and the signal processing unit 84 start reading the VOB. The read VOB is stored in the AV decoder unit 8
5 and separated and regenerated. At this point, the separated video and sub-picture are displayed on a display screen (not shown), and audio output based on audio data is started. When a branch command set as a button command is executed during the VOB playback, the PGC specified by the branch command is executed.
(Steps 135 → 131). When all the VOBs have been reproduced, a post-processing command group is executed (step 134). PG to be reproduced next
If there is C, reproduction of a new PGC is started (step 1).
35 → 131). The PGC to be reproduced next is specified by a branch instruction in the post-processing command group or PGC connection information in the PGC information. <Reproduction of VOB> FIG. 27 is a flowchart showing step 133 in FIG.
6 is a flowchart showing a reproduction control process of an individual VOB (VOB # i) shown in #i.

First, the system control unit 93 controls the start of reading from the head address of VOB # i according to the i-th position information of the path information (step i1). Thereby, the digital data string of VOB # i is stored in the mechanism control unit 8.
3 and read by the signal processing unit 84. The read digital data sequence is temporarily input to the system decoder 86 via the system control unit 93 once. The system decoder 86 decodes the digital data sequence to determine a video pack, a sub-picture pack of a specific channel, an audio pack of a specific channel, and a management pack. Button control section 9 in section 93
30 is output. Thereby, the reproduction of the moving image, the sound, and the sub-picture is started. The management pack is input to the button control unit about once every 0.5 seconds.

When the management pack is input (step i2), the button control section 930 determines whether or not new highlight information is set in the management pack according to the highlight state shown in FIG. 11 (step i2). i3) If it is new highlight information, it is stored in the internal buffer. The button control unit 930 performs highlight processing shown in FIG. 28 based on the highlight information of the internal buffer (step i4). Here, the highlight processing refers to highlight display and interactive control based on highlight information.

Further, if the digital data string read from the DVD is not the end of VOB # i, the system control unit 93 waits for the input of the management pack (step i).
2). In this case, the above processing is repeated. If the end of the VOB is reached, the reproduction of the VOB #i ends. At this time, it is determined whether or not the end of VOB # i is based on the total number of sectors of VOB # i included in the position information.
<Highlighting Process> FIG. 28 is a flowchart outlining the highlighting process (step i4 in FIG. 27).

The button control unit 930 determines the initial state of the button according to the forced selection button number in the highlight information stored in the internal buffer (step 202).
Further, the button control unit 930 compares the highlight start time with the system time inside the playback device, and controls the sub-picture decoder 88 to perform the highlight display when the highlight start time comes (step 203). (Step 204). Thereafter, until the button selection end time comes (step 205), the button control unit 930 changes the state in accordance with the key input by the user (step 20).
7, 208: see FIG. 29) The sub-picture decoder 88 is controlled to update the highlight display. The sub video decoder 88 is controlled so as to end the highlight display when the button selection end time comes (step 206). <Button state transition processing> FIG. 29 is a more detailed flowchart showing the button state transition processing (step 208 in FIG. 28).

When a key code is input from remote control input interpreting section 938, button control section 930 first determines which input key has been pressed from the key code (steps 251, 254, 256). Next, the button control unit 93
0 indicates that the input key is a numeric key (step 251);
If the number is a valid button number existing in the highlight information of the internal buffer (step 252), the number is held as the selected button number (step 25).
3). If the input key is an arrow key (step 25)
4) Acquire the button number of the transition destination according to the adjacent button information of the highlight information in the internal buffer, and hold the button number as a selected state (step 255). If the input key is the confirmation key, the button number retained as the current state is retained as the confirmation state button number, and the sub-video decoder is controlled so that the button is set to the confirmation color, corresponding to the confirmation state button. The button command is executed (Step 257). Further, if the button command is a branch instruction (LINK instruction or the like), step 13 in FIG.
Return to step 5 (step 258). <Detailed Processing Flow of Voice Channel Determining Unit> FIG. 30 shows a detailed processing flow of the voice channel determining unit 935c shown in FIG.

In the figure, an audio channel determination unit 935
c indicates whether the remote controller input interpreting unit 938 has notified that the “voice switch” key has been pressed or the command interpretation
Whether the execution of the etSTN instruction has been instructed or the PGC information in the PGC information buffer 935a has been updated is constantly monitored (steps 271 to 273), and the following processing is performed for each of them.

When the "voice switch" key press is notified (step 271), the voice channel number of the register R8 is read and the number is set to a variable "i" (step 2).
74), "i" is incremented by +1 and further, i / 8
Is set to "i" (step 275). The reason for obtaining the remainder is to prevent the value from exceeding the range of 0 to 7.
Further, if the i-th permission flag in the voice CH table is invalid, the voice CH determination unit 935c repeats the operation of “i” until a valid permission flag is found (step 276). If valid, the corresponding "
The i "th audio ID is read (step 277), the audio ID is written as an audio physical channel number in the register R10, and the value of i is written as an audio logical physical number in the register R8 (step 278).

Now, it is assumed that the audio logical channel 1 is valid, 2 is valid, 3 is invalid, 4 is valid, and the current audio logical channel number held in R8 is 1. In this state, when the “voice switch” key is pressed, the channel 2 is switched. When the “voice switch” key is pressed again, since channel 3 is invalid, the process skips to valid channel 4 and channel 4 is set. In this way, the user switches the “voice switch”
Each time a key is pressed, valid channels can be sequentially switched.

The command interpretation execution unit 936 sends Se
When the execution of the tSTN instruction is instructed (step 2
72), upon receiving the voice channel number #i specified as the operand of the instruction,
The i ″ th audio ID is read (step 277), the audio ID is written as an audio physical channel number in the register R10, and the value of i is written as an audio logical physical number in the register R8 (step 278). Is switched to the audio logical channel specified by.

Also, the PG of the PGC information buffer 935a
When the C information has been updated (step 273), the register R8 is read and its value is set to "i", the "i" th voice ID in the voice CH table is read (step 277), and the register R10 stores the value. The audio ID is written as an audio physical channel number, and the value of i is written as an audio logical physical number in a register R8 (step 27).
8). This makes it possible to cope with a case where the mapping is changed between the previous PGC voice CH table and the current PGC voice table. <Detailed Processing Flow of Sub-Video Channel Determination Unit> FIG.
23 shows a detailed processing flow of a sub-picture channel determination unit 935d shown in FIG.

This figure is the same processing as that of the audio channel determination unit 935c shown in FIG. 30, and the same points are not described here.
Only the differences will be described. The difference is that the contents of the registers R9 and R11 are updated to handle the sub-video channel,
The sub-picture display flag is copied to R11 when the command interpretation and execution unit 936 instructs execution of the SetSTN instruction. Regarding the latter, the sub-video channel determination unit 9
35d sets the value of the sub-picture display flag specified as the operand of the instruction to the SP display flag of the register R11 (step 289). Thus, the display on / off of the sub-picture data is realized by the instruction. <Operation Example> Next, the operation of the multimedia optical disk and the reproducing apparatus thereof according to the present embodiment configured as described above will be described. <First Operation Example> Now, the optical disc contains movie A, movie B,
It is assumed that two video title sets of the game and a video manager are recorded. It is assumed that the video manager records a PGC representing the system menu M101 shown in FIG. It is assumed that the video title set of the movie A includes the uncut version, theatrical version and the TV broadcast version of the movie A shown in FIG. 16 and the title menus M102 to M106 shown in FIG. .

After turning on the power of the reproducing apparatus, first, the system menu M101 shown in FIG. 10 is reproduced (see steps 121 to 123 in FIG. 25). This system menu M
Reference numeral 101 denotes three menu items of “movie A”, “movie B”, and “game”. In this system menu, if the user selects button 0 (movie A), the title menu M1 in the video title set of movie A
02 is reproduced (see step 124 in FIG. 25).

In the title menu M102 of FIG. 10, the user can select any one of the uncut version, theatrical release version, and the TV broadcast version. Also title menu M1
In 03 to M106, menu items indicating audio channels and sub-video channels that can be selected for each version are prepared. When the uncut version is selected, FIG.
As shown in PGC # 1, VOBs # 1, # 2, # 3, and # with different numbers of audio physical channels and sub-video physical channels.
4 are reproduced in order. In this case, according to the audio CH table and the sub-video CH table in FIG. 17, audio logical channel 0 (English audio) and sub-video logical channel 0 (English subtitles)
Since only the reproduction is permitted, it is prevented that the physical channels other than the audio physical channel 0 and the sub-video physical channel 0 of the VOB # 2 are erroneously reproduced during the reproduction of the PGC # 1. For example, even if the user presses the "voice switch" key during playback of the uncut version of the movie A, the other voice channels are skipped because the permission flag = 0, so that the English voice is still reproduced. (See FIG. 30).

If the theater release version is selected,
As shown in PGC # 2 in FIG. 16, VOB # 1, # 3,
Reproduction is performed in the order of # 4. In this case, English audio, Japanese audio, English subtitles, and Japanese subtitles can be reproduced. If the user presses the “voice switch” key during the playback of the theater release version, the channels that can be played are switched in sequence (see FIG. 30). The same applies to the sub-video channel (see FIG. 31). As described above, when VOBs having different numbers of audio physical channels and sub-video physical channels are shared by a plurality of PGCs, the audio CH table and the sub-video CH table adjust the difference in the number of VOB channels appropriately. It can reproduce only the proper audio and sub-picture. <Second Operation Example> Next, while the title menu shown in FIG.
A description will be given of an example of an audio channel / sub-video channel switching operation when the movie A is temporarily called and the movie A is resumed. Here, the title menu is called by pressing the “menu” key on the remote controller during the playback of the movie A,
Further, when the “Menu” key is pressed again, the original movie A
Resumes.

FIG. 32 is an explanatory diagram of VOB # 5 for the title menu shown in FIG. This VOB # 5 is
Video 5001,5002, ... which represents the video for the background of the menu image
And audio D5001, D5 representing BGM music when menu is displayed
002, D5003,… and SP E5001, E5002,
… And management packs 5001, 5002,…. The audio physical channel number (audio ID) for BGM is “3”, and the sub video physical channel (sub video ID) for menu image is “3”.
5 ".

FIG. 33 shows a PG for the title menu.
An example of C information # 4 is shown. PGC information # 4 in FIG. 17 is recorded in the same video title set together with PGC information # 1 to # 3 of movie A shown in FIG. The route information in FIG. 33 indicates that PGC # 4 is composed of only VOB # 5 in FIG. The audio CH table is set so that all audio logical channels correspond to audio physical channels for BGM music (audio ID = 3). The sub-picture CH table is set so that all the sub-picture logical channels correspond to the sub-picture physical channel for the menu image (sub-picture ID = 4).

As shown in FIG. 34, when the user presses the “menu” key while watching the TV broadcast version of movie A, the playback device temporarily suspends the playback of movie A and stops the title menu. Start playing. At this time, FIG.
According to the audio CH table of, no matter which audio channel of movie A is being reproduced, B
The GM music is always reproduced (see the flow of FIG. 30). Further, according to the sub-picture CH table in FIG. 33, the menu image is always reproduced in the title menu regardless of which subtitle of the movie A is reproduced (see the flow in FIG. 31).

In the title menu, when the audio channel and the sub-video channel are changed according to a user operation, the contents of the registers R8 and R9 are changed. This is Se as a button command in the management pack of VOB # 5.
This is realized by the tSTN instruction (see FIGS. 30 and 31). Further, when the “menu” key is pressed during title menu reproduction, the reproduction device resumes reproduction of the original movie A. At this time, audio and sub-picture of the physical channel corresponding to the logical channel held in the registers R8 and R9 are reproduced (see FIGS. 30 and 31). If the user has not changed the audio channel and the sub-video channel in the title menu, the audio channel and the sub-video channel that were reproduced before calling the title menu are restarted. This is because the original logical channel numbers are stored in the registers R8 and R9. If the user changes the audio channel and the sub video channel in the title menu, the audio channel and the sub video channel corresponding to the changed logical channel are restarted.

As described above, even when a plurality of PGCs having different numbers of audio channels and sub-picture channels are sequentially reproduced, the reproducing apparatus can reproduce an appropriate physical channel for each PGC. Also, in the above operation example, an example has been shown in which the audio or sub-picture logical channel is changed in the title menu which is called during the playback of the movie A. May be. For example, in an interactive movie, a menu image using a sub-video channel is displayed at each branch point of reproduction, so that the audio channel and the sub-video channel may be changed according to a user operation in the menu. <Third Example of Operation> FIG.
# 10 and PGC # 11. PGC # 10, # 11
Are composed of VOBs # 10 to # 12. Each VOB
Is a video representing an English conversation scene and a voice channel for asking a question to the viewer by voice (problem: voice ID = 0)
And an audio channel (answer: audio ID = 1) that also includes the sound of the answer in addition to the question to the user, similarly, subtitles (question: sub-video ID = 0), and subtitles (answer: sub-video) ID =
1).

FIG. 36 shows PGC information for PGC # 10 and PGC # 11. In both PGC # 10 and PGC # 11, position information of VOBs # 10 to # 11 is set as path information. In the audio CH table of the PGC information # 10, both the audio logics CH0 and 1 correspond to the audio ID = 0, and the reproduction of only the audio logic CH0 is permitted (permission flag = 1). In the sub-picture CH table, the sub-picture logical CH
0 and 1 both correspond to sub-picture ID = 0, and sub-picture logic C
Only H0 is permitted to be reproduced (permission flag = 1). As a result, in the PGC # 10, only the audio channel of the question and the sub-video channel of the question can be reproduced.

On the other hand, according to PGC information # 11,
Only the sub-video channel of the answer (audio ID = 1) and the sub-video channel of the answer (sub-video ID = 1) can be reproduced. For example, PGCs # 10 and # 11 can be used for students and teachers. In addition, the user may use differently according to the progress of the learning. In addition, it is assumed that the answer edition includes the question and the answer, but it includes only the answer, and in the playback path for the teacher, the question edition and the answer edition can be switched,
In the reproduction path for the student, only the question version may be available.

As described above, for a VOB having a plurality of audio channels and a plurality of sub-video channels, for each PGC using the same, which audio channel is permitted to be reproduced, and which sub-video channel is permitted to be reproduced. Can be set freely. Note that, in the above operation example, a part of the audio CH table and the sub video CH table are omitted for the sake of simplicity. However, the audio CH table has a total of eight entries from 0 to 7, and the sub video CH table has It has a total of 32 entries from 0 to 31. A non-permission flag is set for any channel entry not described in the above operation example.

As described above, according to the optical disk and the reproducing apparatus of the present embodiment, when a VOB is shared by a plurality of PGCs, the title creator determines which audio channel and which sub-video It is possible to set whether to permit reproduction of the channel. In addition, the user can select one of the audio channels and sub-video channels that are permitted to be reproduced.
Switching can be freely performed within the permitted range. As a result, it is possible to prevent an erroneous operation of switching to an audio / sub-video channel that is not permitted or an audio / sub-video channel that does not exist in the VOB.

According to the optical disk and the reproducing apparatus of this embodiment, when sequentially reproducing a plurality of PGCs having different numbers of audio / sub-picture physical channels, the audio / sub-picture logical channel number set by the user is Is mapped to the physical channel by the audio / sub-picture CH table, so that the reproduction can be performed while switching the appropriate physical channel every time the PGC is shifted.

Note that in the above embodiment, the voice /
The instruction to change the sub-picture channel has been described in the case of receiving the “audio / sub-picture switching” key on the remote control and in the case of invoking the system menu by the “menu” key.
For example, the information may be received by a key on an operation panel attached to the playback device. In addition, when the "audio / sub-video switching" key is received, cyclic switching is performed, in which switching is sequentially performed to channels for which reproduction is permitted. You may do so. In this case, TE instead of step 274 in FIG. 30 and step 284 in FIG.
A step of setting the number inputted by the N key to "i" may be provided.

In the above embodiment, the optical disk is a DVD.
However, the present invention is not limited to this as long as a large amount of digital moving image data can be recorded. Further, the same effect can be obtained even if a rewritable disc is used instead of a read-only disc. In the above embodiment, the video data is MP
Although the case of digital moving image data of the EG2 system has been described, moving image data capable of forming multimedia data together with audio and sub-pictures is not limited thereto.
For example, MPEG1 digital video and DCT (Discrete Cosine Transform) used in the MPEG system
Of course, it may be a digital moving image by a conversion algorithm other than the above.

In this embodiment, the management pack is arranged for each GOP which is a unit for restoring a moving image. However, if the compression method of a digital moving image is different, the management pack may be arranged for each compression unit. The arrangement unit of the management pack for storing the highlight information is not limited to each VOBU, but may be 0.5 seconds to
Synchronization unit of video playback finer than 1.0 second, for example, 1/30
It may be a video frame unit per second. <Method of Manufacturing Optical Disk> Finally, a method of manufacturing an optical disk in the embodiment of the present invention will be described.

FIG. 37 is a flowchart showing a method of manufacturing an optical disk according to this embodiment. First, the data of the volume area shown in FIG. 2 is created by the logical data string creating device (step 191). This logical volume data creation device can create volume data having the data structure shown in FIG. 2 by using multimedia data editing software on a personal computer or a workstation. This volume data is recorded on a transmission medium such as a magnetic tape, and is converted into a physical data string by a physical data string creation device (step 192). This physical data string is obtained by adding data of a lead-in area, data of a lead-out area, and the like to volume data, and then performing an ECC (Error Correction Code) process. In the master disc cutting using this physical data string, a master disc of an optical disc is created (step 193).
Further, an optical disc 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. (Industrial applicability) As described above, the multimedia optical disk of the present invention is a multimedia optical disk having a data area and a management information area. The data is interleaved recording of video data and sub-data of multiple channels to be played back simultaneously,
The sub data is either audio data or sub video data, and the management information area records a channel table in which the logical channel number and the physical channel number of the sub data are associated with each video data. The number is a channel number commonly assigned to a plurality of video data, and the physical channel number is a channel number for physically distinguishing sub-data on an optical disc.

Therefore, when sub-data of a plurality of channels is recorded, it is suitable for managing sub-data uniformly among video data. The reproducing apparatus of the present invention further comprises a reading unit for reading data of the multimedia optical disk, a channel number holding unit for holding a predetermined logical channel number, a channel table read by the reading unit, and a channel number. A determining unit for determining a physical channel number of the sub data to be reproduced according to the logical channel number of the holding unit.

Accordingly, when sub-data of a plurality of channels is recorded, it is suitable for reproducing sub-data uniformly among video data.

[0126]

According to the present invention, a recording method for a recording medium includes a step of creating data and a step of recording the created data on a recording medium, wherein the data includes a plurality of video data and management information. In each video data, moving image data and a plurality of sub data to be reproduced at the same time are arranged in an interleaved manner.
The at least two pieces of video data are different from each other in the number of the interleaved sub data, the sub data is any of audio data and sub video data, and the management information is Path information for designating a program chain indicating video data to be reproduced in series, and a logical number of the sub data and an ID of the sub data for the video data indicated by the program chain.
And a table in which the logical number is a number commonly assigned to the video data indicated by the program chain.

According to this configuration, the table is used when the number of sub-data is different among a plurality of VOBs indicated by the program chain, or when the ID assignment is different even if the number of sub-data is the same. Also, the logical numbers can be mapped to the IDs of the existing sub-data, and even if the IDs of the sub-data included in each video data are different, the logical numbers of the same It can be mapped to the ID of the sub data.

Here, the video data is composed of a plurality of units, and each unit has moving image data of a predetermined time unit and sub data to be reproduced simultaneously with the moving image data, and has different sub data. In addition, control information including a command that is valid during data reproduction in the unit to which it belongs and that designates any sub-data to be reproduced simultaneously with moving image data in the unit by a logical number is recorded.

According to this configuration, the sub data can be switched by the above command during the reproduction of the video data. A reproducing apparatus according to the present invention is a reproducing apparatus for reproducing data recorded on a recording medium, comprising: a reading means for reading data from the recording medium; a number holding means for holding a predetermined logical number; Determining means for determining the ID of the sub-data to be reproduced according to the table read by the means, the path information and the logical number of the number holding means, and the ID determined from the plurality of sub-data read by the reading means Selecting means for selecting the sub-data having the following formula: and reproducing means for reproducing the moving picture data read by the reading means and the sub-data selected by the selecting means.

Here, the video data is composed of a plurality of units. Each unit has moving image data of a predetermined time unit and sub data to be reproduced simultaneously with the moving image data, and has different sub data. In addition, control information including a command that is valid during data reproduction in the unit to which it belongs and that designates any sub-data to be reproduced simultaneously with moving image data in the unit by a logical number is recorded.

The video data is composed of a plurality of units. Each unit has moving image data of a predetermined time unit and sub data to be reproduced simultaneously with the moving image data, and has different sub data. , Control information including a command that is valid during data reproduction in the unit to which the subordinate data belongs and is to be reproduced simultaneously with the moving image data in the unit by using a logical number is recorded. Alternatively, the logical number designated by the command in the control information may be held in the holding means.

According to this configuration, the sub data can be switched by the command during the reproduction of the video data. 5. The reproducing method of the present invention is a reproducing method for reproducing data recorded on a recording medium, comprising: a reading step of reading data from the recording medium; and setting a predetermined logical number in a specific register in the reproducing apparatus. A setting step of determining the ID of the sub data to be reproduced according to the table and the path information read by the reading step and the logical number held in the specific register; And a reproducing step of reproducing the moving image data read by the reading step and the sub data selected by the selecting step from the sub data having the determined ID.

According to this configuration, the table is used when the number of sub-data is different among a plurality of VOBs indicated by the program chain, or when the assignment of ID is different even if the number of sub-data is the same. Can also map the logical number to the ID of the existing sub-data, and even if the ID of the sub-data included in each video data is different, the logical number of It can be mapped to the ID of the sub data.

[Brief description of the drawings]

FIG. 1 is a diagram showing an external appearance, a cross section, an enlarged cross section, and a pit shape of a DVD in this embodiment.

FIG. 2 is an overall data structure diagram recorded on a DVD.

FIG. 3 shows an internal structure of each video title set in FIG.

FIG. 4 is a diagram illustrating a more detailed data structure of a VOB.

FIG. 5 is a diagram illustrating a more detailed data structure of a VOB.

FIG. 6 shows a data format of a video pack.

FIG. 7 shows a data format of an audio pack.

FIG. 8 shows a data format of a sub-picture data pack.

FIG. 9 shows a data format of a management pack.

FIG. 10 shows an example of a menu image based on sub-picture data.

FIG. 11 is a diagram hierarchically showing a more detailed data configuration of a management pack.

FIG. 12 is a diagram showing a more detailed data configuration of button color information and button information in a management pack.

FIG. 13 is a diagram showing a specific example of a command used as a button command set for each button.

FIG. 14 is a diagram hierarchically showing a data structure of video title set management information in each video title set in FIG. 2;

FIG. 15 is a diagram hierarchically showing a data structure of video title set management information in each video title set in FIG. 2;

FIG. 16 is an explanatory diagram of a PGC.

FIG. 17 shows a specific example of an audio CH table and a sub-picture CH table.

FIG. 18 is an external view of a reproduction system according to the present embodiment.

FIG. 19 shows an example of a key arrangement of a remote controller.

FIG. 20 is a block diagram illustrating an overall configuration of a playback device.

FIG. 21 is a block diagram illustrating a configuration of a system decoder.

FIG. 22 is a block diagram illustrating a configuration of a system control unit.

FIG. 23 is a diagram showing a part of a register set.

FIG. 24 is a block diagram illustrating a detailed configuration of a sub-picture decoder.

FIG. 25 is a flowchart showing a schematic process of reproduction control by a system control unit.

FIG. 26 shows a detailed flowchart of a reproduction process of a program chain group in FIG. 25.

FIG. 27 is a flowchart showing a VOB reproduction control process in FIG. 26;

FIG. 28 is a flowchart showing an outline of highlight processing in FIG. 27;

FIG. 29 is a more detailed flowchart showing a button state transition process in FIG. 28;

FIG. 30 shows a detailed processing flow of an audio channel determination unit.

FIG. 31 shows a detailed processing flow of a sub-picture channel determination unit.

FIG. 32 is an explanatory diagram of a VOB for a title menu.

FIG. 33 is an explanatory diagram of PGC information for a title menu.

FIG. 34 is an explanatory diagram of an operation of temporarily stopping reproduction of a movie, calling a title menu, and resuming the original movie.

FIG. 35 shows an example of a PGC constituting an English conversation teaching material.

FIG. 36 shows PGC information of PGCs constituting an English conversation teaching material.

FIG. 37 is a flowchart illustrating a method of manufacturing an optical disc according to the embodiment.

[Explanation of symbols]

 Reference Signs List 1 playback device 2 display monitor R8 to R11 register R 81 motor 82 optical pickup 83 mechanism control unit 84 signal processing unit 85 AV decoder unit 86 system decoder 87 video decoder 88 sub-video decoder 89 audio decoder 90 video synthesis unit 91 remote controller 92 remote controller Receiving unit 93 System control unit 102 Title menu M 102 Menu image M 103 Title menu M 106 M 107 DVD 108 Transparent substrate 109 Information layer 110 Adhesive layer 111 Transparent substrate 112 Printing layer 113 Light beam 114 Light spot 120 MPEG decoder 121 Sub-picture / Audio separation unit 122 Sub-picture selection unit 123 Audio selection unit 881 Input buffer 882 Sub-picture code generation unit 883 Sub-picture display control unit 884 Sub-picture code Conversion table 885 Compressed video signal generation unit 886 Highlight code conversion table 887 Highlight area management unit 888 Sub video signal generation unit 930 Button control unit 935 System status management unit 935a PGC information buffer 935b Register set 935c Audio CH determination unit 935c Audio channel Determination unit 935d Sub-video channel determination unit 936 Command interpretation execution unit 937 Playback control unit 938 Remote control input interpretation unit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/85 H04N 5/85 Z 5/92 5/92 H (72) Inventor Kaoru Murase Ikoma-gun, Nara 367, Ikaruga-cho, Prezi-le-Kurihara 105, No. 72 (72) Inventor, Shinichi Saeki 3163, Minami-cho, Misaki-cho, Sennan-gun, Osaka, Japan 5C052 AA02 AB03 AB04 CC11 DD04 DD06 DD10 5C053 FA24 FA30 GA11 GB06 GB11 GB12 GB37 JA01 JA21 LA06 5D044 AB07 BC03 CC06 DE18 DE49 DE57 DE58 DE60 DE81 EF05 FG18 GK12 5D110 AA15 AA29 BB01 DA04 DA12 DB05 DC06 DC12 DC05

Claims (5)

[Claims] 1. A recording method for a recording medium, comprising: a step of creating data; and a step of recording the created data on a recording medium, wherein the data includes a plurality of video data and management information; In each video data, moving image data and a plurality of sub data to be reproduced at the same time are arranged in an interleaved manner, and the sub data is accompanied by an ID, and at least two of the video data are interleaved. The number of the sub-data is different from each other, the sub-data is either audio data or sub-video data, and the management information is a path specifying a program chain indicating video data to be reproduced in series. Information and video data indicated by the program chain, a text in which a logical number of the sub data and an ID of the sub data are associated with each other. Has a table, the logical number is a recording method which is a number assigned in common with the video data indicated by the program chain. 2. The video data is composed of a plurality of units, each unit having a predetermined time unit of moving image data and sub data to be reproduced simultaneously with the moving image data, and having different sub data. Control information that is effective during data reproduction in the unit to which it belongs and that includes a command that designates any sub-data to be reproduced simultaneously with moving image data in the unit by a logical number is recorded. The recording method according to claim 1, wherein 3. A reproducing apparatus for reproducing data recorded on a recording medium, wherein the data includes a plurality of pieces of video data and management information, wherein each piece of video data is reproduced as moving picture data and at the same time. A plurality of sub data to be interleaved, an ID is attached to the sub data, and at least two of the video data have different numbers of the sub data to be interleaved; Is either audio data or sub-video data, and the management information is path information for specifying a program chain indicating video data to be reproduced in series, and the sub- A table in which a logical number of data is associated with an ID of the sub data, wherein the logical number is indicated by the program chain; A number commonly assigned to video data, wherein the playback device reads out data from the recording medium, a number holding unit that holds a predetermined logical number, and a table that is read by the reading unit. Determining means for determining the ID of the sub data to be reproduced according to the path information and the logical number of the number holding means; and selecting the sub data having the determined ID from the plurality of sub data read by the reading means. A reproducing apparatus, comprising: selecting means; and reproducing means for reproducing moving image data read by the reading means and sub-data selected by the selecting means. 4. The video data is composed of a plurality of units. Each unit has moving image data of a predetermined time unit and sub data to be reproduced simultaneously with the moving image data, and has different sub data. Control information including a command, which is valid during data reproduction in the unit to which the unit belongs, and which indicates any sub-data to be reproduced simultaneously with moving image data in the unit by a logical number, is recorded. 4. The reproducing apparatus according to claim 3, wherein a logical number designated by a command in the control information is held in a holding unit. 5. A reproducing method for reproducing data recorded on a recording medium, wherein the data includes a plurality of video data and management information, wherein each video data is selectively reproduced simultaneously with moving image data. A plurality of sub data to be interleaved, an ID is attached to the sub data, and at least two of the video data have different numbers of the sub data to be interleaved; Is either audio data or sub-video data, and the management information is path information for specifying a program chain indicating video data to be reproduced in series, and the sub- A table in which a logical number of data is associated with an ID of the sub data, wherein the logical number is indicated by the program chain; A number commonly assigned to video data; the reproducing method includes: a reading step of reading data from the recording medium; a setting step of setting a predetermined logical number in a specific register in the reproducing apparatus; and a reading step. A determining step of determining the ID of the sub-data to be reproduced according to the table read out by the above, the path information and the logical number held in the specific register; and a plurality of sub-data read out by the reading step. And a reproducing step of reproducing the moving image data read by the reading step and the sub data selected by the selecting step.