JPH10125003A - Reproducing apparatus and its reproducing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To handle sub-image data, various audio data, and the like, in addition to MPEG video data, by dividing a multiplex stream first roughly using a stream ID and then minutely using a sub-stream ID. SOLUTION: A dividing section 57A in an MPEG decoder LSI 57 outputs a packet data to a MPEG processing section 57B, when a stream ID indicates an MPEG video stream in a multiplex stream supplied from a system processor section. In the other case where the stream ID does not indicate the MPEG video stream, the packet is outputted to a dividing section 58B in a video processor LSI 58. The dividing section 58B in the video processor LSI 58 outputs the packet data to a sub-image signal generating section 58C when a sub-stream ID supplied from the dividing section 57A indicates a sub-image stream, while outputting the packet data to an audio signal processing circuit 59 in the other case.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus for reproducing data from a recording medium such as an optical disk for recording data of different types or types, such as compressed moving image data and audio data, and a method for reproducing data from the recording medium. Reproduction method.

[0002]

2. Description of the Related Art Conventionally, MPEG (Movi) has been used as a method for compressing (encoding) digital moving image data and audio data.
ng Picture Experts Group) has been internationally standardized. This MPEG compression method is a method of performing variable length compression on digital moving image data (video data) and audio data.

Along with this, a system format system corresponding to the MPEG compression system is also defined as an MPEG system layer.

The MPEG system layer is defined so as to be easy to handle in a communication system, and expresses each data using a reference time so that moving images, audio, and other data can be transferred and reproduced synchronously. A transfer start time and a reproduction start time are defined.

In the MPEG system layer,
Video compression data stream (MPEG video data) and audio compression data stream (MPEG audio data)
Is defined by the stream ID, and other data types are released to the user as private streams.

However, in this case, only two types of data that can be added by the user can be supported, and the expandability is narrowed.

[0007] This has the drawback that various types of data cannot be handled freely, and it is not possible to cope with the multimedia age.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to handle a plurality of types of data of various types.

[0009]

A reproducing apparatus according to the present invention comprises:
A plurality of data units which are to be played back in chronological order, each of which is played back within a certain time range, and whose data unit sequence is compressed video data and at least one of audio data and sub-picture data. Extracting means for extracting reproduced data in pack units from a recording medium composed of a plurality of data pack sequences obtained by packetizing reproduced data including a packet header by adding a packet header to the recording medium; First data for separating video data from other data depending on whether a first identifier indicating data is given or not.
Dividing means, first converting means for converting the video data separated by the first dividing means into a reproduction signal, and data other than the video data separated by the first dividing means, A second separating unit that separates the sub-picture data from other data depending on whether or not a second identifier indicating sub-picture data or audio data is added following the packet header of the pack; Second converting means for converting the sub-picture data divided by the second dividing means into a reproduced signal, and third converting means for converting the audio data divided by the second dividing means into a reproduced signal. It consists of means.

A reproducing apparatus according to the present invention comprises a plurality of data units which are to be reproduced in a time series, each of which is reproduced within a predetermined time range, wherein the data unit sequence is composed of at least compressed video data. Extraction means for extracting reproduction data in pack units from a recording medium composed of a plurality of data pack sequences obtained by packetizing reproduction data including any of audio data and sub-picture data by attaching a packet header thereto, and this extraction means Indicating the video data in the packet header of the pack extracted by
First separating means for separating video data and other data depending on whether or not the first identifier is given, and a second separating means for converting the video data separated by the first separating means into a reproduction signal. (1) whether the data other than the video data separated by the first converting means and the first separating means is provided with a second identifier indicating sub-picture data or audio data following the packet header of the pack; According to the above, a second separating means for separating the sub-picture data from other data, a second converting means for converting the sub-picture data separated by the second separating means into a reproduction signal, First playback means for combining the playback signal converted by the first conversion means and the playback signal converted by the second conversion means and playing back the video, and is separated by the second separation means. And a third conversion means, and a second reproducing means for reproducing a sound by converted reproduced signal by the third conversion means for converting the audio data to the reproduction signal.

[0011] The playback apparatus of the present invention is a plurality of data units which are to be played back in a time series, each of which is played back within a fixed time range, and whose data unit sequence includes at least compressed video data. Extraction means for extracting reproduction data in pack units from a recording medium composed of a plurality of data pack sequences obtained by packetizing reproduction data containing either audio data or sub-picture data by attaching a packet header thereto, and this extraction means Indicating the video data in the packet header of the pack extracted by
First separating means for separating video data from other data depending on whether or not the identifier is given, processing means for decompressing the video data separated by the first separating means, The first converting means for converting the video data decompressed by the processing means into a reproduction signal, and the data other than the video data separated by the first separating means are added to the sub-packet following the packet header of the pack. A second separating unit for separating the sub-video data from the other data depending on whether or not a second identifier indicating the video data or the audio data is assigned. The second separating unit separates the sub-video data from the other data. Second converting means for converting the reproduced sub-video data into a reproduced signal, and third converting means for converting the audio data separated by the second dividing means into a reproduced signal. Constructed.

A playback apparatus according to the present invention comprises a plurality of data units which are to be played back in chronological order, each of which is to be played back within a predetermined time range, and wherein the data unit sequence includes at least compressed video data. Extraction means for extracting reproduction data in pack units from a recording medium composed of a plurality of data pack sequences obtained by packetizing reproduction data including any of audio data and sub-picture data by attaching a packet header thereto, and this extraction means Indicating the video data in the packet header of the pack extracted by
First separating means for separating video data and other data depending on whether or not the identifier is given, processing means for expanding the video data separated by the first separating means, The first converting means for converting the video data decompressed by the processing means into a reproduction signal, and the data other than the video data separated by the first separating means is added to the sub-packet following the packet header of the pack. A second separating means for separating the sub-video data from the other data depending on whether or not a second identifier indicating the video data or the audio data is added, and the second separating means separates the sub-video data from the other data. Second converting means for converting the reproduced sub-video data into a reproduced signal, and synthesizing the reproduced signal converted by the first converting means and the reproduced signal converted by the second converting means. First reproducing means for reproducing video Te,
A third converting means for converting the audio data separated by the second separating means into a reproduced signal, and a second reproducing means for reproducing a sound by the reproduced signal converted by the third converting means. Be composed.

[0013] The reproducing apparatus of the present invention comprises a plurality of data units to be reproduced in a time series, each of which is reproduced within a predetermined time range, wherein the data unit sequence is composed of at least compressed video data. Extraction means for extracting reproduction data in pack units from a recording medium composed of a plurality of data pack sequences obtained by packetizing reproduction data including any of audio data and sub-picture data by attaching a packet header thereto, and this extraction means Indicating the video data in the packet header of the pack extracted by
First separating means for separating video data and other data depending on whether or not the first identifier is given, and a second separating means for converting the video data separated by the first separating means into a reproduction signal. (1) whether the data other than the video data separated by the first converting means and the first separating means is provided with a second identifier indicating sub-picture data or audio data following the packet header of the pack; According to the above, a second separating means for separating the sub-picture data from other data, a second converting means for converting the sub-picture data separated by the second separating means into a reproduction signal, Synthesizing means for synthesizing the reproduction signal converted by the first conversion means and the reproduction signal converted by the second conversion means, and reproduces an image by the reproduction signal synthesized by the synthesizing means A first reproducing means, a third converting means for converting the audio data separated by the second separating means into a reproduced signal, and a sound reproduced by the reproduced signal converted by the third converting means. It is composed of a second reproducing means.

[0014] The reproducing apparatus of the present invention comprises a plurality of data units which are to be reproduced in a time series, each of which is reproduced within a predetermined time range, and whose data unit sequence includes at least compressed video data. Extraction means for extracting reproduction data in pack units from a recording medium composed of a plurality of data pack sequences obtained by packetizing reproduction data including any of audio data and sub-picture data by attaching a packet header thereto, and this extraction means Indicating the video data in the packet header of the pack extracted by
First separating means for separating video data and other data depending on whether or not the identifier is given, processing means for expanding the video data separated by the first separating means, The first converting means for converting the video data decompressed by the processing means into a reproduction signal, and the data other than the video data separated by the first separating means is added to the sub-packet following the packet header of the pack. A second separating means for separating the sub-video data from the other data depending on whether or not a second identifier indicating the video data or the audio data is added, and the second separating means separates the sub-video data from the other data. Second converting means for converting the reproduced sub-video data into a reproduced signal, and synthesizing the reproduced signal converted by the first converting means and the reproduced signal converted by the second converting means. Synthesizing means, first reproducing means for reproducing a video by the reproducing signal synthesized by the synthesizing means, third converting means for converting the audio data separated by the second separating means into a reproducing signal, And a second reproducing means for reproducing a sound by the reproduced signal converted by the third converting means.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an optical disc reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an optical disk reproducing apparatus for reproducing data from an optical disk according to an embodiment of the present invention, and FIG. 2 is a block diagram of a disk drive unit for driving the optical disk shown in FIG. , FIG.
3 shows the structure of the optical disc shown in FIGS. 1 and 2.

[0017] As shown in FIG.
A key operation / display unit 4, a monitor unit 6, and a speaker unit 8 are provided. Here, the recorded data is reproduced from the optical disk 10 by the user operating the key operation / display unit 4. The recording data includes compressed video data (for example, MPEG2), sub-video data, and audio data, which are converted into a video signal and an audio signal. The monitor unit 6 displays an image by a video signal, and the speaker unit 8 generates sound by an audio signal.

As is already known, the optical disk 10 has various structures. The optical disk 10 includes, for example, a read-only disk on which data is recorded at a high density, as shown in FIG. As shown in FIG. 3, the optical disc 10 includes a pair of composite layers 18 and an adhesive layer 20 interposed between the composite layers 18. Each of the composite disk layers 18 includes a transparent substrate 14 and a recording layer, that is, a light reflecting layer 16. This disk layer 18 is arranged such that the light reflecting layer 16 is in contact with the surface of the adhesive layer 20. This optical disc 10 has a central hole 22
Around the center hole 22 on both sides thereof, a clamping area 24 for holding the optical disk 10 during rotation is provided. When the disk 10 is loaded in the optical disk device, the spindle of the spindle motor 12 shown in FIG. Is done.

As shown in FIG. 3, the optical disk 10 is placed around the clamping area 24 on both sides thereof.
Has an information area 25 in which information can be recorded. Each information area 25 has an outer peripheral area defined as a lead-out area 26 where information is not normally recorded, and an inner peripheral area adjacent to the clamping area 24 is similarly defined as a lead-in area 27 where information is not normally recorded. And
A space between the lead-out area 26 and the lead-in area 27 is defined as a data recording area 28.

In the recording layer 16 of the information area 25, usually, tracks are continuously formed in a spiral shape as data recording areas, and the continuous tracks are divided into a plurality of physical sectors. The sectors are numbered consecutively, and data is recorded based on the sectors.
The data recording area 28 of the information recording area 25 is an actual data recording area. As described later, reproduction information, video data, sub-picture data, and audio data are similarly pits (that is, changes in physical state). It is recorded as. In the read-only optical disk 10, the transparent substrate 1
4, a pit row is formed in advance by a stamper, a reflective layer is formed by vapor deposition on the surface of the transparent substrate 14 on which the pit row is formed, and the reflective layer is formed as the recording layer 16. In the read-only optical disc 10, no groove is usually provided as a track, and a pit row formed on the surface of the transparent substrate 14 is defined as a track.

As shown in FIG. 1, the optical disk device 12 further includes a disk drive unit 30, a system CPU unit 50, a system ROM / RAM unit 52, a system processor unit 54, a data RAM unit 56, an MPEG
It comprises a decoder LSI 57, a video processor LSI 58, and an audio processing circuit 59. The system processor unit 54 includes a system time clock 54A and a register 54B.

As shown in FIG.
Is a motor drive circuit 11, a spindle motor 12,
An optical head 32 (that is, an optical pickup), a feed motor 33, a focus circuit 36, a feed motor drive circuit 37, a tracking circuit 38, a head amplifier 40, and a servo processing circuit 44 are provided. Optical disk 10
Is mounted on a spindle motor 12 driven by a motor drive circuit 11, and is rotated by the spindle motor 12. An optical head 32 for irradiating the optical disk 10 with a laser beam is placed below the optical disk 10. The optical head 32 is mounted on a guide mechanism (not shown). Feed motor drive circuit 3
7 is provided for supplying a drive signal to the feed motor 33. The motor 33 is driven by a drive signal to move the optical head 32 in the radial direction of the optical disc 10. The optical head 32 includes an objective lens 34 facing the optical disc 10. The objective lens 34 is moved along its optical axis in accordance with the drive signal supplied from the focus circuit 36.

In order to reproduce data from the optical disk 10 described above, the optical head 32 irradiates the optical disk 10 with a laser beam via the objective lens 34. The objective lens 34 is finely moved in the radial direction of the optical disc 10 according to the drive signal supplied from the tracking circuit 38.
The objective lens 34 has a focusing circuit 36 such that its focal point is located on the recording layer 16 of the optical disk 10.
Is finely moved along the optical axis direction in accordance with the drive signal supplied from. As a result, the laser beam forms a minimal beam spot on the spiral track (ie, pit train), and the track is tracked by the light beam spot. The laser beam is reflected from the recording layer 16 and the optical head 3
Returned to 2. The optical head 32 converts the light beam reflected from the optical disk 10 into an electric signal, and the electric signal is supplied from the optical head 32 to the servo processing circuit 44 via the head amplifier 40. In the servo processing circuit 44,
A focus signal, a tracking signal, and a motor control signal are generated from the electric signal, and these signals are respectively converted to a focus circuit 36, a tracking circuit 38, and a motor drive circuit 11.
To supply.

Accordingly, the objective lens 34 is moved along its optical axis and the radial direction of the optical disk 10, its focal point is located on the recording layer 16 of the optical disk 10, and the laser beam focuses the minimum beam spot on the spiral track. Form. Further, the spindle motor 12 is rotated at a predetermined rotation speed by the motor drive circuit 11. as a result,
A pit row on the optical disk 10 is tracked by a light beam, for example, at a constant linear velocity.

A control signal as an access signal is supplied to the servo processing circuit 44 from the system CPU 50 shown in FIG. In response to this control signal, the servo processing circuit 4
4 supplies a head movement signal to a feed motor drive circuit 37, which converts the drive signal to a feed motor 3
3 will be supplied. Therefore, the feed motor 33
Is driven, and the optical head 32 is moved in the radial direction of the optical disk 10. Then, a predetermined sector formed on the recording layer 16 of the optical disk 10 is accessed by the optical head 32. The reproduced data is reproduced from the predetermined sector, supplied from the optical head 32 to the head amplifier 40, amplified by the head amplifier 40, and output from the disk drive unit 30.

The output reproduced data is stored in the system RO.
The data is stored in the data RAM unit 56 by the system processor unit 54 under the control of the system CPU unit 50 controlled by a program recorded in the M and RAM unit 52. The stored reproduction data is output to the data RAM unit 56, and the navigation data reproduced at the same time by the system processor unit 54 is output to the data RAM unit 56.
It is output to the G decoder LSI 57. The MPEG decoder LSI 57 separates the video stream from the other streams, decodes the data of the separated video stream to restore the video, and
58. Also, the MPEG decoder LSI 57
Outputs an audio stream and a sub-picture stream other than the video stream to the video processor LSI 58. The video processor LSI 58 generates an analog video signal from video (video) data restored from the MPEG decoder LSI 57. The video processor LSI 58 separates the audio stream from the MPEG decoder LSI 57 from the sub-video stream, decodes the separated sub-video stream to generate a sub-video signal, and converts the sub-video signal into the video signal. The information is superimposed and output to the monitor unit 6. Video processor LS
The audio stream separated by I58 is output to the audio processing circuit 59. The audio processing circuit 59 converts the supplied audio stream into a digital signal or an analog audio signal and supplies the audio signal to the speaker unit 8.

As a result, the monitor section 6 receives the video signal.
And a sound is reproduced from the speaker unit 8 by the audio signal.

The system processor unit 54 separates navigation data and other data by a stream ID (described later) described in a packet header for each pack.
The video stream and the other streams are separated by a stream ID (described later) described in a packet header for each pack described later. Are separated according to a substream ID (described later) described after the packet header of (1).

The system processor 54 outputs the data to the data RAM 56 when the stream ID indicates the private stream 2, and outputs the data to the MPEG decoder LSI 57 when the stream ID is other than that.

In the case where line 21 data including closed caption data, which will be described later, is stored as user data in the video stream, the MPEG decoder LSI 57 extracts the line 21 data and outputs the line 21 data to the system CPU 50. . This system C
The PU unit 50 outputs necessary data in the line 21 data obtained from the MPEG decoder LSI 57 to the video processor LSI 58. Video processor LSI58
Generates a line 21 signal based on the line 21 data supplied from the system CPU 50, and superimposes the generated line 21 signal on the line 21 in the vertical retrace period of the video signal. . At this time, the sub video signal may be superimposed at the same time.

The superimposition of the line 21 signal waveform and the sub-picture signal on the video signal may be switched. That is, only the line 21 signal can be superimposed on the video signal, only the sub-video signal can be superimposed on the video signal, or both the sub-video signal and the line 21 signal waveform can be superimposed on the video signal. May be switched so as to perform superimposition.

This switching is performed by the connected monitor unit 6.
(For example, interlaced or non-interlaced), video data recorded on the optical disc 10 (for example, interlaced or non-interlaced), or the key operation / display unit 4 or remote controller. Switching may be performed according to an instruction from the control 5 (setting for a handicap person).

When the signal waveform of the line 21 is superimposed on the video signal supplied to the monitor unit 6,
A decoder (not shown) built in stores the data sequentially sent in two bytes at a time in one field, and after all the data has been collected, the designated character is placed in the designated place at the designated time. Only the normal video is displayed on the screen at the same time.

In the optical disk reproducing apparatus shown in FIG. 1, a user operates a key operation and display unit 4 on the front panel of the main unit or a remote control device connected to a remote control receiving unit 4A in the main unit by infrared optical communication. By operating the remote control 5, the recording data, that is, video data, sub-video data, and audio data are reproduced from the optical disk 10, and are converted into audio (audio) signals and video signals in the apparatus, and are monitored outside the apparatus. 6 and the speaker unit 8 reproduce the image and sound.

As shown in FIG. 4, the key operation and display section 4 includes a power key 4a, a microphone input terminal 4b, a play key 4c, a pause key 4d, a stop key 4e, a fast forward return key 4f, and a It is composed of an open / close key 4g for instructing taking-in and removing, a display 4h, insertion of the optical disk 10, taking-out opening 4i, and the like.

As shown in FIG. 5, the remote control 5 includes a power key 5a, a numeric key 5b, and a stop key 5.
c, play key 5d, pause key 5e, memory key 5
f, an open / close key 5g for instructing to take in and remove the optical disk 10, a fast forward / return key 5h, a key 5i, a repeat instruction and a repeat key 5 for instructing a range.
j, a menu key 5k for instructing display of a menu screen,
Title key 5 for instructing display of title menu screen
l, up, down, left, and right select keys 5m used for selecting an item when the menu screen is displayed.

The detailed operation of the optical disk apparatus shown in FIG. 1 will be described later in detail with reference to a logical format of the optical disk 10 described below.

The data recording area 28 from the lead-in area 27 to the lead-out area 26 of the optical disk 10 shown in FIG. 1 has a volume and file structure as shown in FIG. This structure complies with a specific standard as a logical format, for example, micro UDF (mi
cro UDF) and ISO9660. As described above, the data recording area 28 is physically divided into a plurality of sectors, and the physical sectors are assigned serial numbers. In the following description, the logical address is a micro UDF (micro UDF) and I
Logical sector number (LS) as defined by SO9660
N), and the logical sector is 2048 bytes, similarly to the size of the physical sector, and has a logical sector number (LS
In N), a serial number is added together with the ascending order of the physical sector numbers.

As shown in FIG. 6, the volume and file structure has a hierarchical structure, and includes a volume and file structure area 70, a video manager 71, at least one or more video title sets 72, and another recording area 73. doing. These areas are partitioned on the boundaries of logical sectors. Here, one logical sector is defined as 2048 bytes as in the conventional CD. Similarly,
One logical block is also defined as 2048 bytes, so
One logical sector is defined as one logical block.

The file structure area 70 includes a micro UDF
The video manager 71 is stored in the system ROM / RAM unit 52 via the description of this management area defined in ISO9660. The video manager 71 describes information for managing a video title set as described with reference to FIG.
, And a plurality of files 74 starting with. Each video title set 72 stores compressed video data, audio data, sub-picture data, and their reproduction information, as described later, and is similarly composed of a plurality of files 74. Here, the plurality of video title sets 72 are limited to a maximum of 99,
Further, the number of files 74 (File #j to File # j + 9) constituting each video title set 72 is set to a maximum of ten. These files are similarly partitioned at logical sector boundaries.

In the other recording area 73, information which can use the video title set 72 described above is recorded.
The other recording area 73 need not always be provided.

As shown in FIG. 7, the video manager 71
Includes three items each corresponding to each file 74. That is, the video manager 71 includes a video manager information (VMGI) 75 and a video object set (VMGM) for the video manager information menu.
_VOBS) 76 and a backup (VMGI_BUP) 77 of video manager information.
Here, the video manager information (VMGI) 75 and the backup 77 of the video manager information (VMGI)
_BUP) 77 is a required item, and is a video object set (V) for the video manager information menu.
MGM_VOBS) 76 is optional.
This video object set for VMGM (VMGM
_VOBS) 76 stores menu video data, audio data, and sub-picture data relating to the volume of the optical disc managed by the video manager 71.

As in the video playback described later by the video object set (VMGM_VOBS) 76 for the VMGM, the volume name of the optical disc,
A description of the audio and the sub-picture accompanying the volume name display is displayed, and selectable items are displayed in the sub-picture. For example, a video object set for VMGM (VMG
(M_VOBS) 76, the fighting pose of Boxer X is reproduced in the video data along with the fact that the optical disc is video data storing a game up to a certain boxer world champion, that is, the volume name such as the glorious history of Boxer X. At the same time, his theme song is played back as audio, and his chronology is displayed as sub-pictures. In addition, the user is asked whether to select the language of the game narration, such as English or Japanese, as a selection item, and whether to display subtitles in another language in the sub-video, or to select subtitles in any language. The question is asked. This VMGM video object set (V
The MGM_VOBS) 76 allows the user, for example, to prepare to watch the video of the game of Boxer X, using English subtitles in English and Japanese subtitles.

Here, the structure of the video object set (VOBS) 82 will be described with reference to FIG. FIG. 8 shows an example of a video object set (VOBS) 82. This video object set (VO
BS) 82 includes three types of video object sets (VOB) for two menus and a title.
S) There are 76, 95 and 96. That is, the video object set (VOBS) 82 includes the video object set (VTSM) for the menu of the video title set in the video title set (VTS) 72 as described later.
_VOBS) 95 and a video object set (VTSTT_VOBS) 96 for the titles of at least one or more video title sets, and all the video object sets 82 have the same structure except that their uses are different.

As shown in FIG. 8, a video object set (VOBS) 82 is defined as a set of one or more video objects (VOB) 83, and the video objects 8 in the video object set (VOBS) 82 are defined.
3 are provided for the same purpose. Normally, a menu video object set (VOBS) 82 is composed of one video object (VOB) 83 and stores data for displaying a plurality of menu screens. On the other hand, the video object set (V
The TSTT_VOBS 82 usually includes a plurality of video objects (VOBs) 83.

Here, the video object (VOB) 8
3 is equivalent to the video data of each game of the boxer X in the case of the above-mentioned boxing video, and reproduces, for example, the eleventh game to challenge the world champion by designating a video object (VOB) in the video. can do. Also, a menu video object set (VTSM_VOB) of the video title set 72 is used.
In S) 95, the menu data of the game of the boxer X is stored, and a specific game, for example, the eleventh game to challenge the world champion can be designated according to the display of the menu. In a normal one-story movie, one video object (VOB) 83 corresponds to one video object set (VOBS) 82, and one video stream corresponds to one video object set (VOB).
S) is completed at 82. In the case of an animation collection or an omnibus movie, a plurality of video streams corresponding to each story are provided in one video object set (VOBS) 82, and each video stream is stored in a corresponding video object. Therefore, the audio stream and sub-picture stream associated with the video stream are also included in each video object (VO).
B) It will be completed in 83.

The video object (VOB) 83 includes
An identification number (IDN # j) is assigned, and the video object (VOB) 83 can be specified by the identification number. The video object (VOB) 83 is 1
Alternatively, it is composed of a plurality of cells 84. A normal video stream is composed of a plurality of cells, but a menu video stream, that is, a video object (VOB) 83 may be composed of one cell 84 in some cases. Similarly, the cell includes an identification number (C_IDN #
j), and the cell 84 is specified by the cell identification number (C_IDN # j).

As shown in FIG. 8, each cell 84 includes one or a plurality of video object units (VOBU) 85, usually a plurality of video object units (VOBU).
85. Here, the video object unit (VOBU) 85 is defined as a pack sequence having one navigation pack (NV pack) 86 at the top. That is, the video object unit (VOB)
U) 85 is defined as a set of all packs recorded from one navigation pack 86 to immediately before the next navigation pack. The playback time of the video object unit (VOBU) corresponds to the playback time of video data composed of one or more GOPs included in the video object unit (VOBU) as shown in FIG. Is 0.4 seconds or more and 1
It is determined not to be larger than seconds. In MPEG, one GOP is usually 0.5 seconds, and is defined as compressed screen data for reproducing about 15 images during that time.

As shown in FIG. 8, when the video object unit includes video data, a video pack (V pack) 87, a sub-picture pack (SP pack) 90, and an audio pack (A pack) specified by the MPEG standard ) 91 are arranged to form a video data stream. Regardless of the number of GOPs, a video object (VOBU) 83 is determined based on the playback time of the GOP, and a video object (VOBU) 83 is set at the beginning of the video object. , A navigation pack (NV pack) 86 is always arranged.
In addition, even in the case of reproduction data of only audio and / or sub-picture data, reproduction data is configured with this video object unit as one unit. That is, even if a video object unit is composed of only the audio pack 91, the audio pack 91 to be reproduced within the reproduction time of the video object unit to which the audio data belongs is also included in the video object unit, like the video object of the video data. Is stored. The procedure of reproducing these packs will be described later in detail together with the navigation pack (NV pack) 86.

Referring again to FIG.
1 will be described. The video manager information 75 placed at the head of the video manager 71 includes a video title set (VTS) such as information for searching for a title and information for reproducing a video manager menu.
Information for managing 72 is described, and at least three tables 78, 79, and 80 are recorded in the order shown in FIG. Each of the tables 78, 79, and 80 matches the boundary of the logical sector. Video manager information management table (VMGI_MAT) 78 which is the first table
Is an essential table that describes the size of the video manager 71, the start address of each piece of information in the video manager 71, the attribute information about the video object set (VMGM_VOBS) 76 for the video manager information menu, and the like.

The title search pointer table (TT) which is the second table of the video manager 71
_SRPT) 79 describes an entry program chain (EPGC) of a video title included in a volume in the optical disc 10 which can be selected in accordance with the input of a key of the apparatus and a title number from the display unit 4.

Here, the program chain 187 is
As shown in FIG. 9, a set of programs 189 for reproducing the story of a certain title, and a movie of one title is completed by continuously reproducing a program chain. Thus, the user can view the movie from a particular scene of the movie by specifying the program 189 in the program chain 187.

The video title set attribute table (VTS_A) which is the third table of the video manager 71
In the (TRT) 80, attribute information defined in the video title set (VTS) 72 in the volume of the optical disc is described. That is, the number of video title sets (VTS) 72 and the video title sets (V
TS) 72, video attributes, for example, video data compression method, etc., audio stream attributes, for example, audio encoding mode, etc., sub-picture attributes, for example, sub-picture display type, etc. Have been described.

The video manager information management table (V
MGI_MAT) 78 and title search pointer table (TT_SRPT) 79 will now be described in detail with reference to FIGS. 10, 11, 12, and 13. FIG.

As shown in FIG. 10, the video manager information management table (VMGI_MAT) 78 includes an identifier (VMG_ID) of the video manager 71 and a logical block (as described above, one logical block is 2048).
The size of the video management information (VMGI_S
Z), the optical disk, commonly known as a digital versatile disk (digital versatile disk: hereinafter simply referred to as DV)
Called D. ) Standard version number (VER
N) and the category of the video manager 71 (VMG
_CAT).

Here, in the category (VMG_CAT) of the video manager 71, a flag or the like indicating whether or not copying is prohibited in the DVD video directory is described. Also, this table (VMGI_MAT) 78
Contains a volume set identifier (VLMS_ID),
The number of video title sets (VTS_Ns) and the identifier of the supplier of the data recorded on this disc (PVR_I
D), the start address (VNGM_VOBS_SA) of the video object set (VMGM_VOBS) 76 for the video manager menu, the end address (VMGI_MAT_EA) of the video manager information management table (VMGI_MAT) 78, and the start of the title search pointer table (TT_SRPT) 79 The address (TT_SRPT_SA) is described. End address of VMG_MAT78 (VMGI_M
AT_EA) and the start address (TT_SRPT_SA) of the TT_SRPT 79 are described by the number of logical blocks relative to the first logical block.

The table 78 further includes an attribute table (VTS_A) of the video title set (VTS) 72.
TRT) 80 start address (VTS_ATRT_
SA) is the VMGI manager table (VMGI_M
AT) 71, and the video attribute (VMGM_V_ATR) of the video manager menu (VMGM) is described. Furthermore, this table 78 includes the number of audio streams (VM) in the video manager menu (VMGM).
GM_AST_Ns), audio stream attributes (VMGM) in the video manager menu (VMGM)
_AST_ATR), video manager menu (V
MGM) number of sub-video streams (VMGM_SPST)
_Ns) and Video Manager Menu (VMGM)
Attribute of the sub-video stream (VMGM_SPST_AT)
R).

Title search pointer table (TT)
11, the information (TSPTI) of the title search pointer table is first described, as shown in FIG. Are only listed continuously. When only one title of reproduction data, for example, one title of video data is stored in the volume of the optical disc, only one title search pointer (TT_SRP) 93 is described in the table (TT_SRPT) 79.

The title search pointer table information (TSPTI) 92 contains the number of entry program chains (EN_PGC_Ns) as shown in FIG.
In addition, an end address (TT_SRPT_EA) of the title search pointer (TT_SRP) 93 is described. This address (TT_SRPT_EA) is stored in the title search pointer table (TT_SRPT) 79.
Is written in the number of bytes relative to the first byte of Further, as shown in FIG. 13, each title search pointer (T
T_SRP) 93 contains a video title set number (V
TSN), the program chain number (PGCN), and the start address (VTS_
SA) is described.

This title search pointer (TT_SR
P) 93, the video title set (VTS) 72 reproduced according to the contents of the program chain (PG
C) is specified and its video title set 7
2 is specified. Video title set 72
The start address (VTS_SA) describes the title set specified by the video title set number (VTSN) in the number of logical blocks.

Next, the structure of the logical format of the video title set (VTS) 72 shown in FIG. 6 will be described with reference to FIG. Each video title set (V
In the TS) 72, four items 94, 95, 96, and 97 are described in the order of description as shown in FIG. Each video title set (VTS) 72 includes one or more video titles having a common attribute, and management information on the video title 72, for example, information for an entry search point, a video object set Information for reproducing 96, information for reproducing the title set menu (VTSM), and attribute information of the video object set 72 are described in the video title set information (VTSI).

This video title set information (VTS
I) Backup of video title set (VT) 94
S) 72. Video title set information (VTSI) 94 and a backup of this information (VTSI)
_BUP) 97, a video object set (VTSM_VOB) for a video title set menu.
S) 95 and a video object set (VTSTT_VOBS) 96 for a video title set title are arranged. Any video object set (V
TSM_VOBS and VTSTT_VOBS) 95, 9
6 has the structure shown in FIG. 8 as already described.

Video title set information (VTSI) 9
4. Backup of this information (VTSI_BUP) 97
A video object set (VTSTT_VOBS) 96 for a video title set title is an essential item for the video title set 72, and a video object set (VTSTT_VOBS) for a video title set menu.
TSM_VOBS) 95 is an option provided as needed.

Video title set information (VTSI) 9
4 includes four tables 98, 99, as shown in FIG.
100, 101, four tables 98, 9
9, 100 and 101 are aligned with boundaries between logical sectors. The video title set information management table (VTSI_MAT) 98, which is the first table, is an indispensable table, and includes the size of the video title set (VTS) 72, the start address of each information in the video title set (VTS) 72, and the video. Title set (VTS)
The attribute of a video object set (VOBS) 82 in 72 is described.

The video title set direct access pointer table (VTS_DA) which is the second table
The PT) 99 is an optional table provided as necessary, and is a program chain (PT) included in the video title set 72 which can be selected according to the input of a title number from the key operation / display unit 4 of the apparatus. PGC)
And / or a program (PG).

The video title set program chain information table (VTS_PGCI) which is the third table
T) 100 is an essential table that describes VTS program chain information (VTS_PGCI).
A video title set time search map table (VTS_MAPT) 101 which is a fourth table is an optional table provided as needed, and is a map table (VTS_MA) for a predetermined display time.
Information regarding the recording position of video data in each program chain (PGC) of the title set 72 to which the (PT) 101 belongs is described.

Next, the video title information manager table (VTSI_MAT) 98 and the video title set program chain information table (VTS_PGCIT) 100 shown in FIG. 14 are shown in FIGS.
This will be described with reference to FIG.

FIG. 15 shows the description contents of the video title information manager table (VTSI_MAT) 98. In this table (VTIS_MAT) 98,
Video title set identifiers (VTS_I
D), the size of the video title set 72 (VTS_S
Z), the version number of this DVD video standard (VER
N), and the attribute (VTS_CAT) of the title set 72 are described. This table (VTSI_MAT)
In 98, the start address (VTSM_VOBS_SA) of the video object set (VTSM_VOBS) 95 of the VTS menu (VTSM) is described as a relative logical block (RLBN) from the first logical block of the video title set (VTS) 72. Start address (VTSTT_VOB_S) of video object for title in title set (VTS)
A) is described by a logical block (RLBN) relative to the first logical block of the video title set (VTS) 72.

Further, this table (VTSI_MAT)
98 includes a video title set information management table (V
(TI_MAT) 94 end address (VTI_MAT_
EA) is described in the relative number of blocks from the first byte of the table (VTI_MAT), and the video title set direct access pointer table (VTS_DA) is described.
PT) 99 start address (VTS_DAPT_S)
A) is described by the relative number of blocks from the first byte of the video title set information (VTSI) 94.

Further, this table (VTSI_MA
T) 98, the start address (VTS_PGCIT_SA) of the video title set program chain information table (PGCIT) 100 is described by the relative number of blocks from the first byte of the video title set information (VTSI) 94, and the video title set (VTS) The start address (VTS_MAPT_SA) of the time search map (VTS_MAPT) 101 is described as a logical sector relative to the first logical sector of the video title set (VTS) 72. This table (VTSI_
MAT) 98 includes a video title set (VTS) 7
Video object set (VTSM_VOBS) 9 for video title set menu (VTSM) in 2
5 and video title set (VTS) title (V
Video Object Set (VTST) for TSTT
_VOBS) 96 video attributes (VTS_V_ATR)
The number of audio streams (VTS_AST_Ns) of a video object set (VTSTT_VOBS) 96 for the title (VTSTT) of the video title set in the video title set (VTS) 72 is described.

Here, the video attribute (VTS_V_AT)
In R), the compression mode of the video, the frame rate of the TV system, the display aspect ratio when displayed on a display device, and the like are described.

The table (VTSI_MAT) 98 contains
Video object set (VTST_VOBS) 9 for title (VTSTT) of video title set (VTS) 72 in video title set (VTS) 72
6 audio stream attribute (VTS_AST_AT)
R). This attribute (VTS_AST_A
TR) describes an audio encoding mode describing how the audio was encoded, how many bits the audio quantization was performed, the number of audio channels, and the like. Further, a table (VTSI_MAT) 98
Describes the number (VTS_SPST_Ns) of sub-video streams of the video object set (VTST_VOBS) 96 for the title (VTSTT) in the video title set (VTS) 72 and the attribute (VTS_SPST_ATR) of each sub-video stream. I have.
The attribute (VTS_SPST_A) of each sub-picture stream
TR) describes the encoding mode of the sub-picture, the display type of the sub-picture, and the like.

This table (VTSI_MAT)
98 has a video title set menu (VTSM)
Audio streams (VTSM_AST_N)
s), audio stream attribute (VTSM_AST_
ATR), the number of sub-picture streams (VTSM_SPST)
_Ns) and the attribute of the sub-picture stream (VTSM_S).
PST_ATR) is described.

The VTS program chain information table (VTS_PGCIT) 100 has a structure as shown in FIG. This information table (VTS_PGC)
IT) 100 includes a VTS program chain (VTS
_PGC) is described (VTS_PGCI), and the first item is a VTS program chain (VT).
S_PGC) information table (VTS_PGCI)
T) 100 information (VTS_PGCIT_I) 102 is provided. This information (VTS_PGCIT_I)
Following this information table (VTS_PGCI)
T) 100 includes this information table (VTS_PGCI).
T) VTS program chain in 100 (VTS_P
VTS_PGCI to search the VTS program chain (VTS_PGC) by the number of GCs (# 1 to #n)
Search pointer (VTS_PGCIT_SRP) 103
Is provided, and finally a VTS program chain (VTS
_PGC) corresponding to each VTS (# 1 to #n).
Information (VTS_PGCI) 104 relating to the program chain (VTS_PGC) is provided.

Information (VTS_PGC) of VTS program chain information table (VTS_PGCIT) 100
IT_I) 102 has a VTS as shown in FIG.
Number of program chains (VTS_PGC) (VTS_PGC)
PGC_Ns) is described as the content, and the end address (VTS_PGCIT_EA) of this table information (VTS_PGCIT_I) 102 is described in this information table (V
TS_PGCIT) 100 is described by the relative number of bytes from the first byte.

The VTS_PGCIT search pointer (VTS_PGCIT_SRP) 103 has an attribute (VTS_PC) of the program chain (VTS_PGC) of the video title set (VTS) 72 as shown in FIG.
GC_CAT) and VTS_PGC information (VTS_PGCI) by the relative number of bytes from the first byte of the VTS_PGC information table (VTS_PGCIT) 100
Is described (VTS_PGCI_SA). Here, the VTS_PGC attribute (VTS_P
GC_CAT) has, for example, an entry program chain (entry PG
C) is described.

Normally, the entry program chain (PG
C) is described before a program chain (PGC) that is not an entry program chain (PGC).

The PGC information (V
TS_PGCI) 104 describes four items as shown in FIG. This PGC information (VTS_PG
The CI) 104 first describes program chain general information (PGC_GI) 105 of essential items, followed by at least three items 106, 107 and 108 which are mandatory only when there is a video object. Have been. That is, as the three items, a program chain program map (PGC_PGMAP) 1
06, the cell reproduction information table (C_PBIT) 107 and the cell position information table (C_POSIT) 108
It is described in the GC information (VTS_PGCI) 104.

Program chain general information (PGC_G
20, the program chain (PGC) category (PGCI_CAT), the contents of the program chain (PGC) (PGC_CNT), and the playback time (PGC_PG) of the program chain (PGC), as shown in FIG.
PB_TIME) is described. The PGC category (PGCI_CAT) describes whether or not copying of the PGC is possible and whether or not the reproduction of the program in the PGC is continuous or random. The content of the PGC (PGC_CNT) describes the configuration of the program chain, that is, the number of programs, the number of cells, and the number of angles in the program chain. PGC playback time (PGC_PB_TIM
E) describes the total reproduction time of the program in the PGC. This playback time describes the playback time of the program when the program in the PGC is played continuously regardless of the playback procedure.

The program chain general information (PG
The C_GI) 105 describes PGC sub-picture stream control (PGC_SPST_CTL), PGC audio stream control (PGC_AST_CTL), and PGC sub-picture palette (PGC_SP_PLT). PGC sub-picture stream control (PGC_SPST_
CTL) describes the number of sub-images that can be used in PGC, and controls PGC audio stream control (PGC_AST).
_CTL) similarly describes the number of audio streams that can be used in PGC. The PGC sub-picture palette (PGC_SP_PLT) describes a set of a predetermined number of color palettes used in all sub-picture streams of this PGC.

Further, PGC general information (PGC_GI) 1
05 includes a cell reproduction information table (C_PBIT) 10
7 is described, and the start address (C_POSIT_SA) of the cell position information table (C_POSIT) 108 is described.
Which start address (C_PBIT_SA and C_PBIT_SA
_POSIT_SA) is also VTS_PGC information (VTS_
PGCI) is described by the number of logical blocks relative to the first byte.

Program Chain Program Map (P
GC_PGMAP) 106, as shown in FIG.
4 is a map showing a configuration of a program in C. This map (PGC_PGMAP) 106 includes FIG. 21 and FIG.
As shown in FIG. 2, an entry cell number (ECELLN), which is a start cell number of a program, is described in ascending order of cell numbers. Also, program numbers are assigned from 1 in the order of description of entry cell numbers. Therefore, the first entry cell number of this map (PGC_PGMAP) 106 must be # 1.

Cell playback information table (C_PBIT) 1
07 defines the PGC cell playback order. In the cell reproduction information table (C_PBIT) 107, cell reproduction information (C_PBIT) is continuously described as shown in FIG. Basically, the cells are reproduced in the order of their cell numbers. Cell playback information (C_PB
In IT), a cell category (C_CAT) is described as shown in FIG. This cell category (C
_CAT) includes a cell block mode indicating whether a cell is a cell in a cell block, or if the cell is a cell in a cell block, the first cell, the cell is not a part of the block, or A cell block type indicating whether the block is an angle block, a system time clock (ST
An STC discontinuity flag indicating whether the resetting of C) is necessary is described.

The cell category (C_CAT)
Indicates a cell playback mode indicating whether playback is to be performed continuously in a cell or to be stopped in units of video object units (VOBUs) in the cell, whether or not to stop after playback of the cell, or a still time. Cell navigation control is described.

As shown in FIG. 24, the cell reproduction information table (C_PBIT) 107 includes a cell reproduction time (C_PBTM) that describes the total reproduction time of the PGC. If the angle cell block is in the PGC,
The playback time of the angle cell number 1 indicates the playback time of the angle block. Further, the cell playback information table (C_PBIT) 107 contains the head video object unit (VOBU) in the cell by the relative number of logical sectors from the head logical sector of the video object unit (VOBU) 85 in which the cell is recorded. 85 start addresses (C_FVOBU_SA) are described,
The start address (C_LVO) of the last video object unit (VOBU) 85 in the cell is determined by the relative number of logical sectors from the first logical sector of the video object unit (VOBU) 85 in which the cell is recorded.
BU_SA) is described.

Cell position information table (C_POSI) 1
08 specifies the identification number (VOB_ID) of the video object (VOB) of the cell and the identification number (C_ID) of the cell used in the PGC. In the cell position information table (C_POSI), as shown in FIG. 25, the cell position information (C_POSI) corresponding to the cell number described in the cell reproduction information table (C_PBIT) 107 is the same as the cell reproduction information table (C_PBIT). Described in order. The cell position information (C_POSI) includes FIG.
As shown in FIG. 6, the video object unit (V
The identification number (C_VOB_IDN) and cell identification number (C_IDN) of the OBU 85 are described.

As described with reference to FIG.
Is a set of video object units (VOBU) 85, and video object units (VOBU) 8
5 is defined as a pack sequence starting from the navigation (NV) pack 86. Therefore, the start address (C_FVOBU_SA) of the first video object unit (VOBU) 85 in the cell 84 is the NV pack 8
6 represents the start address. As shown in FIG. 27, the NV pack 86 includes a pack header 110, a system header 111, and two packets as navigation data, that is, a reproduction control information (PCI) packet 116 and a data search information (DSI) packet 11
The number of bytes as shown in FIG. 27 is assigned to each part, and one pack is defined as 2048 bytes corresponding to one logical sector. The NV pack is arranged immediately before the video pack including the first data in the group of picture (GOP). Even when the object unit 85 does not include the video pack 87, the NV pack 86 is arranged at the head of the object unit including the audio pack 91 and / or the sub-picture pack 90. As described above, even when the object unit does not include the video pack, the reproduction time of the object unit is determined based on the unit in which the video is reproduced, as in the case where the object unit includes the video pack 87.

Here, the GOP is defined by the MPEG standard and is defined as a data string constituting a plurality of screens as described above. That is, a GOP corresponds to compressed data, and when this compressed data is expanded, image data of a plurality of frames from which a moving image can be reproduced is reproduced. Pack header 110 and system header 111
Is defined by the MPEG2 system layer, a pack header 110 stores information of a pack start code, a system clock reference (SCR), and a multiplexing rate, and a system header 111 describes a bit rate and a stream ID. ing. Packet headers 112 and 11 of PCI packet 116 and DSI packet 117
4, a packet start code, a packet length, and a stream ID are stored as defined in the MPEG2 system layer.

As shown in FIG. 28, the other video pack 87, audio pack 91 and sub-picture pack 90
Similarly, it is composed of a pack header 120, a packet header 121, and a packet 122 in which corresponding data is stored as defined by the G2 system layer, and the pack length is determined to be 2048 bytes. Each of these packs is aligned with a logical block boundary.

The PCI data (P
CI) 113 is presentation data, that is, navigation data for changing display contents in synchronization with the playback state of video data in the VOB unit (VOBU) 85. That is, the PCI data (PCI) 113 describes PCI general information (PCI_GI) as information of the entire PCI as shown in FIG. P
As shown in FIG. 30, the CI general information (PCI_GI) indicates the number of logical blocks relative to the logical sector of the VOBU 85 in which the PCI 113 is recorded.
3 describes the address (NV_PCK_LBN) of the NV pack (NV_PCK) 86 in which 3 is recorded.
The VOBU is included in the PCI general information (PCI_GI).
85 categories (VOBU_CAT), VOBU85
Start PTS (VOBU_SPTS) and end PT
S (VOBU_EPTS) is described. here,
Start PTS of VOBU85 (VOBU_SPTS)
Indicates a playback start time (start presentation time stamp (SPTS)) of video data in the VOBU 85 including the PCI 113. This playback start time is the first playback start time in the VOBU 85. Normally, the first picture corresponds to the reproduction start time of an I picture (Intra-Picture) in the MPEG standard. End PTS of VOBU85 (VOBU_EP
TS) indicates the playback end time (end presentation time stamp: EPTS) of the VOBU 85 including the PCI 113.

The DSI packet of DSI packet 117 shown in FIG.
The SI data (DSI) 115 is a VOB unit (VO
BU) 85 is navigation data for executing the search. FIG. 31 shows the DSI data (DSI) 115.
DSI general information (DSI_GI), VOB
U search information (VOBU_SI) and synchronous reproduction information (SYNCI) are described.

The DSI general information (DSI_GI) describes information on the entire DSI 115. That is, FIG.
As shown in FIG. 2, the DSI general information (DSI_GI) includes
NV pack 86 system time reference value (NV_PC
K_SCR). The system time reference reference value (NV_PCK_SCR) is stored in a system time clock (STC) incorporated in each unit shown in FIG. 1, and the video, audio, and sub-picture packs are used for video, audio, and sub- The video and audio are decoded by the decoders 58, 60, and 62, and are reproduced by the monitor 6 and the speaker 8. In the DSI general information (DSI_GI), the start of the NV pack (NV_PCK) 86 in which the DSI 115 is recorded with the relative logical sector number (RLSN) from the first logical sector of the VOB set (VOBS) 82 in which the DSI 115 is recorded. Address (NV_PCK_LBN) is described, and VO
The address (VOBU_EA) of the last pack in the VOB unit (VOBU) 85 in which the DSI 115 is recorded is described by the relative logical sector number (RLSN) from the head logical sector of the B unit (VOBU).

Further, in the DSI general information (DSI_GI), the VOB unit (V
A V pack (V_PC) in which the last address of the first I picture in this VOBU is recorded by the relative number of logical sectors (RLSN) from the first logical sector of the OBU)
K) VOBU 8 in which the end address (VOBU_IP_EA) of 88 is described and the DSI 115 is recorded
3 (VOBU_IP_IDN) and the corresponding DS
The identification number of the cell in which I115 is recorded (VOBU_
C_IDN).

Search information (VOBU_S) of VOBU 85
In I), information for specifying the head address in the cell is described.

The synchronization information (SYNCI) includes the DSI 11
The address information of the sub-picture and audio data to be reproduced in synchronization with the reproduction start time of the video data of the VOB unit (VOBU) including the address 5 is described. That is, FIG.
, The relative number of logical sectors (R) from the NV pack (NV_PCK) 86 on which the DSI 115 is recorded.
Audio pack (A_PCK) targeted by LSN)
The start address (A_SYNCA) 91 is described. When there are a plurality of (up to 8) audio streams, synchronization information (SYNCI) is described for the number.
Also, in the synchronization information (SYNCI), the NV pack (NV_PCK) in which the DSI 115 records the address (SP_SYNCA) of the NV pack (NV_PCK) 86 of the VOB unit (VOBU) 85 including the target audio pack (SP_PCK) 91 ) 86 relative logical sector number (RLSN). When there are a plurality of sub-video streams (up to 32), the synchronization information (SYNCI) is described by the number.

The pack length of the pack is adjusted to be 2048 bytes (one logical sector). If the pack length is less than 2048 bytes, if the number of bytes is less than 6 bytes, the pack length is adjusted by adding stuffing bytes in the pack header. If the pack length is 7 bytes or more, the stuffing byte is 1 byte. The pack length is adjusted by adding a padding packet corresponding to the number of missing bytes to the packet.

The pack header includes a 4-byte pack start code (000001BAh) and a 6-byte SCR
(System clock reference, system time reference value), 3-byte multiplexing rate (MUX rate; 04)
68A8h) 1 to 7 stuffing bytes (00h). The packet is composed of 2034 bytes as a reference, and a padding packet for adjusting the pack length (effective data 00h meaningless as data is recorded in each byte unit) is provided in this packet as necessary. It has become.

That is, as shown in FIG. 34, when the data length of a packet is from 2034 bytes to 2028 bytes, stuffing bytes are added (inserted) in the pack header by the number of missing bytes.

As shown in FIG. 35, when the data length of a packet is 2027 bytes or less, padding packets for the number of insufficient bytes are added.

Next, each of the packs will be described in detail.

As shown in FIG. 27, the NV pack 86
It is arranged immediately before the video pack including the head data of one GOP, and has a 14-byte pack header 1
10, 24 byte system header 111, 986
It is composed of a PCI packet 116 of up to bytes and a DSI packet 117 of up to 1024 bytes. P
The CI packet 116 has a packet header 11 of 6 bytes.
2, a 1-byte sub-stream ID 118 and a data area 113 in which 979-byte PCI data can be stored. The DSI packet 117 has a 6-byte packet header 114 and a 1-byte sub-stream ID 1.
It comprises a data area 115 in which DSI data of 19 and 1017 bytes can be stored.

The pack header 110 is, as described above,
4-byte pack start code (0000001BA)
h), 6 bytes of SCR (system clock reference, system time reference value), 3 bytes of multiplexing rate (MUX rate: 0468A8h), and 1 to 7 bytes of stuffing byte (00h).

The system header 111 has a 4-byte system header start code (000001BBh),
It is composed of a byte header length and the like.

The packet headers 112 and 114 each have a 3-byte packet start code (000001).
h) 1-byte stream ID (10111111)
b: Private stream 2) 2-byte PES
(Packetized Elementary Stream) It is composed of packet length.

[0105] A code (000000000b) indicating a PCI stream is assigned to the substream ID 118.

[0106] A code (00000001b) indicating a DSI stream is assigned to the substream ID 119.

The video pack 87 is shown in FIG.
As shown in (b), a 14-byte pack header 120
And a video packet comprising a 9-byte packet header 121 and a data area 122 capable of storing video data up to 2025 bytes, or a 19-byte packet header 121 and a data area 122 capable of storing video data up to 2015 bytes. One pack is composed of video packets. Pack header 12
0 has the same configuration as that of the NV pack 86 described above.

When the packet header 121 is 9 bytes, a 3-byte packet start code (000001)
h) 1-byte stream ID (11100000)
b: MPEG video stream), 2-byte PES
(Packetized Elementary Stream) Packet length is composed of 3 bytes of PES data.

When the packet header 121 is 19 bytes, a 5-byte PTS (Presenta
Further, a time stamp (reproduction output time management information) and a 5-byte DTS (Decoding Time Stamp; decoding time management information) are additionally provided. This PTS and DTS
Is described only in a video packet including data at the head of an I picture of a video stream.

[0110] The audio pack 91 is composed of Dolby AC3.
In the case of compliant compression-encoded data, as shown in FIG. 37A, a 14-byte pack header 120, a 14-byte packet header 121, a 1-byte substream ID 131, and the number of audio frames in the packet data. And a 2-byte first access unit pointer 1 indicating the start position of the first audio frame in the packet data.
One pack is composed of audio packets including a data area 134 in which audio data of up to 33 and 2016 bytes can be stored. Pack header 12
0 has the same configuration as that of the NV pack 86 described above. If the packet header 121 does not include a PTS, the packet header 121 has a 9-byte configuration, and the data area 134 in which audio data can be stored is expanded to 2021 bytes.

In the case of the encoded data of the linear PCM, the audio pack 91 includes one data as shown in FIG.
4-byte pack header 120, 14-byte packet header 121, and 1-byte substream ID 131
And 1 indicating the number of audio frames in the packet data
The number of frames 132 in the byte structure, the first access unit pointer 133 in the 2-byte structure indicating the head position of the audio frame in the packet data, and the audio data information 135 in the 3-byte structure describing the information of the audio data in the packet data
And an audio packet comprising a data area 134 capable of storing audio data up to 2013 bytes.
One pack is composed. The pack header 120 is
The configuration is the same as that of the NV pack 86. If the packet header 121 does not include a PTS, the packet header 121 has a 9-byte configuration, and the data area 134 in which audio data can be stored is expanded to 2018 bytes.

As the audio data information of the audio data information, a frame number, a processing unit in which the length of one data is 16 bits, 20 bits, or 24 bits, a sampling frequency, and the like are described.

The packet header 121 has a 3-byte packet start code (000001h), a 1-byte stream ID (10111101b: private stream 1), and a 2-byte PES (Packetized Elementar).
y Stream) packet length, contents of PES of 3 bytes, PTS (Presentation Time Stamp; time management information of reproduction output) of 5 bytes.

[0114] A substream I added when the audio data is compression encoded data conforming to Dolby AC3.
In D131, a code (100
00xxxb: xxx is a stream number).

[0115] The sub-stream ID 131 given when the audio data is linear PCM includes a linear PCM.
Code indicating the M stream (10100xxxb: xx)
X is a stream number).

One frame of audio data is composed of, for example, a 4-byte frame header and 772-byte audio data of 4 bytes each on the left and right from 0 to 191.

As shown in FIG. 38, the sub-picture pack 90 has a pack header 120 of 14 bytes, a packet header 121 of 14 bytes, and a sub-stream ID of 1 byte.
One pack is composed of sub-picture packets composed of a data area 142 in which sub-picture data of 141 bytes and up to 2019 bytes can be stored. P in the packet header 121
When the TS is not included, the packet header 121 has a 9-byte structure, and the data area 1 in which the sub-picture data can be stored.
42 expands to 2024 bytes. Pack header 120
Has the same configuration as that of the NV pack 86 described above.

The sub-stream ID 141 has a code (001 ××××× b: ××××××××××××××××××××××
× stream number).

In the packet header 121, a 3-byte packet start code (000001h), a 1-byte stream ID (10111101b: private stream 1), and a 2-byte PES (Packetized Element)
ary Stream) packet length, 3-byte PES data, 5-byte PTS (Presentation Time Stamp;
Playback output time management information). This PTS is described only in the sub-picture packet including the head data of each sub-picture unit.

In the SCR described in each pack, the value of the first pack for each video title set is set to 0, and the SCR is increased in ascending order in the recording order on the optical disk 10. As shown in FIG. 39, the stream ID described in the packet header 121 of each pack is “10
"111101" indicates a private stream 1, "101111111" indicates a private stream 2, and "110xxx" indicates an MPEG.
Audio stream (xxxxx; stream number)
In the case of "1110xxx", an MPEG video stream (xxxxxx; stream number) is shown.

The sub-stream ID 13 described in the packets of the audio pack 91 and the sub-picture pack 90
1, 141 and 151 correspond to the private stream 1 and, as shown in FIG. 40, in the case of “10100xxx”, indicate a linear PCM audio stream, and “xxx” is the stream number, and “001” ××××
"X" indicates a sub-video stream and its "xxxxxx"
"X" is a stream number, and "10000xxx" indicates a Dolby AC3 audio stream, and "xxx" is a stream number.

The sub-stream ID 11 described in the PCI packet and the DSI packet in the NV pack 87
8 and 119 correspond to the private stream 2, and as shown in FIG.
Indicates “I” stream, and if “00000001”, D
4 shows an SI stream.

With reference to FIG. 42, the video data (video stream) of a plurality of video packets in one video object unit (VOBU) will be described. This video data is MPEG2 defined by ISO / IEC13818-2 or ISO / IEC11.
MPEG1 specified by 172-2 is recorded.

As shown in FIGS. 42, 43 and 44, the video data includes a sequence header, an I picture,
It is composed of B pictures and P pictures.
The B picture has a hierarchical structure including a sequence layer, a GOP layer, a picture layer, a slice layer, a macroblock layer, and a block layer.

In the GOP layer, line 21 data as user data can be recorded (described) in a superimposed manner. In this case, the closed caption is not described and the line 21 data is the line 2 data.
This is because the method of use 1 has been expanded to other than closed captions.

As shown in FIG. 45, the line 21 data includes a user data start code having a 32-bit structure, instruction data of a line 21 having a 16-bit structure, a top field flag of a GOP having a 1-bit structure, and a 6-bit structure. It is composed of the number of fields to be displayed in the GOP, a marker bit having a 7-bit configuration, a switch of a line 21 having a 1-bit configuration, and code data of a line 21 having a 16-bit configuration. As shown in FIG. In signal (503kHz), data transfer rate is 96
0bps "1 (field / 16bit), 960bp
s = 60 (field / s) * 16 bits ".

As the user data start code,
"000001B2h" is described.

The instruction data of the line 21 is "43
43h "is described.

The top field flag of the GOP is IS
In O13818-2, when the flag is “1”, it indicates the top field, and when the flag is “0”, it indicates the bottom field, and the picture rate is 29.9.
In ISO117172-2 of 7 Hz, when the flag is "1", it indicates the top field.

The number of fields to be displayed in the GOP is
In ISO13818-2 and ISO117172-2, the number of fields to be displayed in the GOP and the line 21
And the number of data.

The marker bit is “1111111h”
Is described. When the switch of the line 21 is "1", it describes that the line 21 data is valid, and when it is "0", it describes that the line 21 data is invalid.

The code data of the line 21 is composed of two sets of data consisting of 7-bit data and 1-bit parity, and comprises first field data and second field data. The 7-bit data includes EIA-6
The character code specified by 08 is based on an ASCII code, and a code for specifying a character attribute and a code for controlling a screen are added. There are 112 character codes.

Next, the above-described MPEG decoder LSI5
7. The video processor LSI 58 will be described with reference to FIG.

The MPEG decoder LSI 57 includes a separating section 57A, an MPEG processing section 57B, and a buffer memory 57C.
The video processor LSI 58 includes a video signal generation unit 58A, a separation unit 58B, a sub-video signal generation unit 58C, a line 21 waveform generation unit 58D, and a synthesis unit 58E.
It consists of. The line 21 waveform generator 58D is provided with two registers, a first field register 58F and a second field register 58G.

[0135] The above-mentioned separating unit 57A is provided with a stream ID described in a packet header for each pack in a multiplexed stream of video data, audio data and sub-picture data supplied from the system processor unit 54.
Indicates an MPEG video stream, the packet data is output to the MPEG processing unit 57B, and the stream I
If D is not an MPEG video stream,
The packet data is output to a separation unit 58B in the video processor LSI 58.

The MPEG processing section 57B includes a separating section 57A.
Is decoded from video stream data as video data supplied from the video processor, and the restored video data is output to a video signal generator 58A in the video processor LSI 58. Also, M
The PEG processing unit 57B takes out the line 21 data superimposed as the user data of the GOP layer in the video data based on the user data start code, and stores it in the buffer memory 57C. Also, MP
When the EG processing unit 57B finds the user data or stores the user data in the buffer memory 57C, the system C
The interrupt signal, the top field flag of the GOP, and the number of display fields of the GOP are output to the PU unit 50.

When the interrupt signal is supplied from the MPEG processing unit 57B, the system CPU unit 50 executes necessary information from the line 21 data stored in the buffer memory 57C, that is, the amount of lines indicated by the number of display fields of the GOP. 21 data is fetched all at once or gradually, and necessary data is taken out of the data, and the first field register 58F and the second field register 58 in the line 21 waveform generator 58D are provided with 16 bits (2 bytes) per field.
G is sequentially set. In this case, the system CPU 50 sets the field registers (58F, 58F) for displaying the data fetched from the buffer memory 57C according to the contents of the top field flag of the GOP.
G) is sequentially set.

The video signal generating section 58A generates an analog video signal from the restored video data supplied from the MPEG processing section 57B.

In the multiplexed stream of audio data and sub-picture data supplied from the dividing section 57A, the separating section 58B performs the processing when the sub-stream ID described after the packet header for each pack indicates the sub-picture stream. , The packet data of the sub-video signal
C, and when the sub-stream ID indicates a linear PCM audio stream or a Dolby AC3 audio stream, the packet data is output to the audio processing circuit 59. The separating unit 58B
When a pack of MPEG audio data having no substream ID is supplied, the packet data is output to the audio processing circuit 59.

The sub-picture signal generating section 58C includes a separating section 58
An analog sub-video signal is generated from the sub-video stream supplied from B.

If data is set in the register of the line 21 for the field to be currently displayed, the line 21 waveform generating section 58D converts the data into the line 21 of the current field.
47 are superimposed on each other as shown in the waveform of FIG. For example, if data is not set in the register for the field to be displayed at present, if it is the first field, Null data (data is 0000000)
b, parity is output in 2 bytes of 1), and if it is the second field, nothing is output including clock run-in and start bit.

The synthesizing section 58E includes a video signal generating section 58A.
, A sub-video signal from the sub-video signal generation unit 58C, a line 21 waveform from the line 21 waveform generation unit 58D, or the like. And the line 21 waveform is also superimposed. These selections are switched according to the type of the connected monitor unit 6 (for example, interlaced or non-interlaced) or switched according to the type of video data recorded on the optical disc 10 (for example, interlaced or non-interlaced). Or a command from the key operation / display unit 4 or the remote control 5 (setting for a handicap person).

The MPEG decoder LSI 57 and the video processor LSI may be constituted by one LSI.

The operation of the above configuration will be described with reference to the flowchart shown in FIG.

That is, a multiplexed stream of video data, audio data, and sub-picture data reproduced in the same time zone from the system processor unit 54 is supplied to the separation unit 57A in the MPEG decoder LSI 57 (step S31). Then, if the stream ID described in the packet header for each pack indicates an MPEG video stream in the supplied multiplexed stream of video data, audio data, and sub-picture data (step S32), The packet data is output to the MPEG processing unit 57B (step S3).
3) In a case where the stream ID is other than the one indicating the MPEG video stream (step S32), the packet data is separated into the separating unit 58B in the video processor LSI 58.
(Step S34).

Accordingly, the MPEG processing unit 57B decodes the data of the video stream supplied as the video data to restore the video, and outputs the restored video data to the video signal generation unit 58A in the video processor LSI 58. Then, the line 21 data superimposed as the user data on the GOP layer in the video data is extracted based on the user data start code and stored in the buffer memory 57C (step S3).
6), the interrupt signal, the top field flag of the GOP and the number of display fields of the GOP are stored in the system C by this storage.
Output to the PU unit 50 (step S37). If there is no user data, nothing is output.

Then, the system CPU unit 50
At a time, or gradually, and fetches the necessary data from the first field in the line 21 waveform generation unit 58D by 16 bits (2 bytes) per field. Register 5
8F and the second field register 58G are sequentially set (step S38).

Thus, the line 21 waveform generator 58D
If data is set in the register of the line 21 for the field to be displayed at present, the data is superimposed on the line 21 of the current field as shown in FIG. 47 and transmitted to the synthesizing unit 58E (step S39). ).

The video signal generating section 58A has an MPE
An analog video signal is generated from the restored video data supplied from the G processing unit 57B, and transmitted to the synthesizing unit 58E (step S40).

The separating section 58B is provided with a separating section 57A.
If the sub-stream ID described after the packet header for each pack indicates a sub-picture stream in the multiplexed stream of audio data and sub-picture data supplied from Output to the section 58C (step S4).
2) If the substream ID indicates a linear PCM audio stream or a Dolby AC3 audio stream (step S41), the packet data is output to the audio processing circuit 59 (step S43), and the MPEG audio data having no substream ID is output. When the pack is supplied, the packet data is output to the audio processing circuit 59 (step S43).

As a result, the sub-picture signal generating section 58C
An analog sub-video signal is generated from the supplied sub-video stream and sent to the synthesizing unit 58E (step S4).
4).

As a result, the synthesizing section 58E selectively superimposes the sub-video signal from the sub-video signal generating section 58C on the video signal from the video signal generating section 58A, or generates the line 21 waveform generating section. A video signal in which the line 21 waveform from 58D is superimposed, the sub-video signals thereof are superimposed, and the line 21 waveform is also superimposed is output to the monitor unit 6 (step S45).

Therefore, when the signal waveform of the line 21 is superimposed on the supplied video signal,
A decoder (not shown) built in the monitor unit 6 stores the data sequentially sent in two bytes at a time in one field, and after all the data has been collected, the designated character is designated at the designated place. The normal video is displayed on the screen at the same time as the normal video (step S46). At this time, if the sub-picture is combined with the video signal, the sub-picture is combined and displayed.

The audio stream supplied from the audio processing circuit 59 is converted into a digital signal or an analog audio signal and supplied to the speaker unit 8. Thereby, the sound is reproduced from the speaker unit 8 by the audio signal (step S47).

In the above example, when the stream ID indicates the MPEG video stream, the separating unit 57A outputs the packet data to the MPEG processing unit 57B. When the stream ID is other than the one indicating the MPEG video stream, Data is transferred to video processor LSI5
8 has been described, but the invention is not limited to this.
When the stream ID indicates an MPEG video stream, the separating unit 57A outputs the packet data to the MPEG processing unit 57B, and the stream ID is set to a stream ID preset by the MPEG processing unit 57B.
If the packet data matches, the packet data may be output to the video processor LSI 58.

Next, setting change will be described.

First, the user operates the key operation / display unit 4 or the remote control 5 to instruct the display of the menu screen in the setting change mode. In response to this instruction, the system CPU unit 50 reads the data of the menu screen for changing the setting from the system ROM and RAM unit 52 and creates the screen with a screen creation device (not shown). 64. As a result, a menu screen for changing the setting is displayed on the monitor unit 6. The setting change menu screen displays items for changing settings such as a handicap person.

When the setting change of the handicap person is selected on this menu screen, the system CPU 50 causes the monitor 6 to display the handicap person.
With or without person setting, "I'm blind"
A selection item "I am deaf" is displayed. If "with eyes" is selected in accordance with this display, the system CPU unit 50 determines the setting of "handicap person" as a handicap person and sets the system ROM. Then, the setting content for the handicap person in the setting table (not shown) in the RAM unit 52 is changed from the default “No” to “Blind”.

[0160] In the above-mentioned display, when "with hearing impairment" is selected, the system CP
The U unit 50 determines the setting of “deaf” as a handicap person, and sets the system ROM and RAM.
The setting contents for the handicap person in the setting table (not shown) in the unit 52 are changed from the default “No” to “Hearing impaired”.

Thus, the system CPU unit 50 sets the superimposition of the waveform of the line 21 on the video signal in the synthesizing unit 58E in the video processor LSI 58. Therefore, when the line 21 data as the character data corresponding to the handicap person is superimposed on the video data reproduced from the optical disk 10, the video corresponding to the video signal is displayed on the monitor unit 6, and
The corresponding characters are also displayed superimposed.

Next, referring again to FIG. 1, FIGS.
The operation of reproducing movie data from the optical disc 10 having the logical format shown in FIG. In FIG. 1, solid arrows between blocks indicate data buses.
Dashed arrows indicate control buses.

In the optical disk device shown in FIG. 1, when the power is turned on, the system ROM and RAM
From 52, the system CPU unit 50 reads the initial operation program and operates the disk drive unit 30. Therefore, the disk drive unit 30 stores the lead-in area 27
The read operation is started from, and the volume and file structure area 70 that defines the volume and file structure in accordance with ISO-9660 following the lead-in area 27 is read. That is, the system CPU unit 50 controls the volume and file structure area 7 recorded at a predetermined position on the optical disk 10 set in the disk drive unit 30.
In order to read 0, a read command is given to the disk drive unit 30, the contents of the volume and file structure area 70 are read, and are temporarily stored in the data RAM unit 56 via the system processor unit 54. System CPU 50
Extracts information such as the recording position, recording capacity, size, etc. of each file and other management information as information necessary for management via a path table and a directory record stored in the data RAM unit 56, and reads the system ROM & RAM.
The data is transferred to a predetermined location in the unit 52 and stored.

Next, the system CPU unit 50 acquires a video manager 71 composed of a plurality of files starting from the file number 0 with reference to the information on the recording position and the recording capacity of each file from the system ROM & RAM unit 52. That is, the system CPU unit 50 includes a system ROM
A read command is given to the disk drive unit 30 with reference to the information on the recording position and the recording capacity of each file acquired from the RAM unit 52, and the position and the position of a plurality of files constituting the video manager 71 existing on the root directory are determined. The size is acquired, the video manager 71 is read, and stored in the data RAM unit 56 via the system processor unit 54. This video manager 71
And a video manager information management table (VMGI_MAT) 78 is searched. By this search, the video manager menu (VMG
M) for the video object set (VMGM_VO)
BS) 76 start address (VMGM_VOBS_S)
A) is acquired and the video object set (VMGM)
— VOBS) 76 is played. Regarding the reproduction of the menu video object set (VMGM_VOBS) 76, the video object set (VTSM_V) for the title in the video title set (VTS) is used.
OBS), the reproduction procedure is omitted. This video object set (VMGM_VOBS) 7
6 or if there is no video manager menu (VMGM), the volume manager information management table (VMGI_MAT) is searched and the title set search pointer table (TT) is searched.
_SRPT) 79 start address (TT_SRPT_S)
A) is searched.

As a result of this search, the title set search pointer table (TT_SRPT) 79 is transferred to a predetermined location in the system ROM & RAM unit 52 and stored. Next, the system CPU unit 50 obtains the final address of the title search pointer table (TT_SRPT) 79 from the title search pointer table information (TSPTI) 92 and obtains the title search pointer corresponding to the input number from the key operation / display unit 4. (TT_SR
P) 93, the video title set number (VTSN) corresponding to the input number, and the program chain number (PGC)
N) and the start address of the video title set (V
TS_SA) is obtained. If there is only one title set, one title search pointer (TT_SR) regardless of the presence or absence of the input number from the key operation / display unit 4
P) 93 is searched to obtain the start address (VTS_SA) of the title set. The system CPU unit 50 acquires the target title set from the start address (VTS_SA) of the title set.

The system CPU unit 50 operates the information management table (V) of the video manager information (VMGI) 75.
MGI_MAT) 78 obtains the number of streams of video, audio, and sub-pictures for the video manager menu described in the MGI_MAT 78, and attribute information of each of them.
The parameters for reproducing the video manager menu are set in each of the MPEG decoder LSI 57, video processor LSI 58, and audio processing circuit 59.

Next, from the start address (VTS_SA) of the video title set 72 shown in FIG. 13, video title set information (VTSI) 94 of the title set is obtained as shown in FIG. The video title set information management table (VTSI_MAT) 98 of the video title set information (VTSI) 94 shown in FIG.
5 is a video title set information management table (VT)
SI_MAT) 98 end address (VTI_MAT_
EA) and the number of streams of audio and sub-picture data (VTS_AST_Ns, VTS_SP)
ST_Ns) and attribute information (VTS_V_ATR, VTS_A_AT) of video, audio, and sub-picture data
R, VTS_SPST_ATR), each unit of the playback apparatus shown in FIG. 1 is set according to its attribute.

When the menu (VTSM) for the video title set (VTS) has a simple configuration, the video title set information management table (VTSI_MAT) 98 shown in FIG. Video object set (VTSM_
VOB) 95 start address (VTSM_VOB_
SA) is acquired and its video object set (V
TSM_VOB) 95 displays a menu of a video title set. Referring to this menu, a video object set (VTT_VOBS) 96 for a title (VTST) in a title set (VTS) is simply selected without particularly selecting a program chain (PGC).
Is reproduced, the video object set 96 is reproduced from the start address (VTSTT_VOB_SA) shown in FIG.

When the program chain (PGC) is designated by the key operation / display section 4, the target program chain is searched in the following procedure. The search of the program chain is not limited to the program chain for the title in the video title set, and the same procedure is applied to the search of the program chain for the menu even for a relatively complicated menu in which the menu is composed of the program chain. Is adopted. The management table (V) of the video title set information (VTSI) 94
The start address of the program chain information table (VTS_PGCIT) 100 in the video title set (VTS) shown in FIG. 15 described in FIG.
102 is read. This information (VTS_PGCIT
_I) 102, the number of program chains (VTS_PGC_Ns) and the end address of the table 100 (VTS_PGCIT_EA) shown in FIG.

When a program chain number is designated on the key operation / display section 4, a VTS_PGCIT search pointer (VTS_PGC) shown in FIG.
IT_SRP) 103 to the program chain category and its search pointer (VTS) shown in FIG.
_PGCIT_SRP) VTS_PG corresponding to 103
The start address of the C information 104 is obtained. By this start address (VTS_PGCI_SA), the program chain general information (PGC_G) shown in FIG.
I) is read. According to the general information (PGC_GI), the program chain (PGC) category and reproduction time (PGC_CAT, PGC_PB_TIME)
Are obtained, and the start addresses (C_PBIT_SA, C_POSIT_SA) of the cell reproduction information table (C_PBIT) and the cell position information table (C_POSIT) 108 described in the general information (PGC_GI) are obtained. Start address (C_PBIT_SA)
From the cell position information (C_POSI) shown in FIG. 25, the video object identifier (C_POSI) shown in FIG.
VOB_IDN) and a cell identification number (C_IDN) are obtained.

The start address (C_POSIT)
_SA) to the cell reproduction information (C_PBI) shown in FIG.
2 described in the reproduction information (C_PBI)
4, the start address (C_FVOBU_SA) of the first VOBU 85 and the start address (C_LVOBU_SA) of the last VOBU are obtained, and the target cell is searched. The order of cell playback is
The PGC program map (PGC_P shown in FIG. 19)
The reproduction cells 84 are determined one after another with reference to the program map shown in FIG. The data cells 84 of the program chain determined in this way are successively read from the video object 144 and input to the data RAM unit 56 via the system processor unit 54. The multiplexed stream of each video data, audio data and sub-picture data in the data cell 84 is output to the MPEG decoder LSI 57 based on the reproduction time information. Thereafter, the video signal decoded and reproduced as described above and the decoded sub-video signal are synthesized by the video processor LSI 58 and output to the monitor unit 6,
The image is reproduced on the monitor 6. At this time, when the line 21 data is superimposed on the video data and the combination is selected by the video processor LSI 58, the line 21 waveform is combined with the video signal by the video processor LSI 58 and output to the monitor unit 6, Line 2 on monitor 6
An image is reproduced by superimposing a character corresponding to one data. The audio signal decoded by the audio processing circuit 59 is output to the speaker unit 8, and the speaker unit 8 reproduces audio.

Further, normal reproduction of video data using the navigation pack 86 will be described in more detail with reference to flowcharts.

In the normal reproduction of the video data, when the normal reproduction is started as shown in FIG.
After the start shown in FIG. 1, the video manager information (VMGI) 75 is stored in the system CPU 50 as described above.
And stored in the system ROM / RAM unit 52 (step S12). Similarly, the video title set information (VTSI) 94 of the video title set (VTS) 72 is read based on the video manager information (VMGI) 75, and the video title set menu is displayed in the video object set (V
TSM_VOBS) 95 is displayed on the monitor 6. Based on this display, the user determines the title set 72 to be reproduced and the reproduction conditions as shown in step S13. When the determined title set 72 is selected using the key operation / display unit 4, as shown in step S14, the program chain information table (VTS_PGCI) shown in FIG.
Data from the T) 100 to the cell reproduction information table (C_PBIT) 107 shown in FIGS. 19, 23, and 24 are read by the system CPU 50 and stored in the system ROM / RAM 52.

The system CPU 50 proceeds to step S15.
As shown in the figure, a program chain number (V) for starting reproduction in accordance with the reproduction condition input from the key operation / display section 4
TS_PGC_Ns), angle numbers (ANGNs),
An audio stream number and a sub-picture stream number are determined. For example, the boxing world champion round 11 is selected as the title of the program chain, and it is decided to display Japanese subtitles as a sub-picture based on the English narration. In addition, the user performs a selection such as determining an image in which the battle between the two players can always be well viewed as an angle. The determined sub-video number and audio stream number are stored in step S1.
As shown in FIG.
4B is set. Similarly, the reproduction start time of the system time clock (ST
C) Set to 54A. Also, the start address of the first VOBU in the cell as the start address and P
GC number, that is, cell number is ROM / RAM for system
It is stored in the unit 52.

When the preparation for reading the video title set is completed as shown in step S17, a read command is given from the system CPU unit 50 to the disk drive unit 30, and the optical disk 10 is transferred to the disk drive unit 30 based on the start address described above. Seeking by
The cells related to the designated program chain (PGC) are successively read from the optical disk 10 by the read command, and sent to the data RAM unit 56 via the system CPU unit 50 and the system processing unit 54. As shown in FIG. 8, the transmitted cell data is transferred from the navigation pack 86, which is the first pack of the video object unit (VOBU) 85, to the data RAM unit 5.
6 is stored. Then, the video pack 87 and the audio pack 9 of the video object unit (VOBU)
1. The multiplexed stream by the sub-picture pack 90 is output to the MPEG decoder LSI 57 based on the reproduction time information. Thereafter, the video signal decoded and reproduced as described above and the decoded sub-video signal are combined by the video processor LSI 58 and output to the monitor unit 6, where an image is reproduced on the monitor unit 6. At this time, when the line 21 data is superimposed on the video data and the combination is selected by the video processor LSI 58, the line 21 waveform is combined with the video signal by the video processor LSI 58 and output to the monitor unit 6, Line 21 on monitor 6
An image is reproduced by superimposing characters corresponding to the data.
The audio signal decoded by the audio processing circuit 59 is output to the speaker unit 8, and the speaker unit 8 reproduces audio.

During the reproduction of such video and audio, if there is an interrupt processing from the key operation / display unit 4, the obtained key data is stored in the system RAM / R.
It is stored in the OM unit 52. If there is no key data,
It is checked whether or not there has been a reproduction end interrupt from the drive unit. If there is no interruption to end playback,
The transfer of the navigation pack 86 is awaited. If the transfer of the navigation pack 86 has been completed, the logical sector number (N
V_PCK_LSN) to the current logical block number (NO
WLBN) in the system RAM / ROM unit 52.

When the transfer of the NV pack 86 is completed, it is checked whether it is the last NV pack 86 in the cell. That is, whether or not the last navigation pack 86 in the cell 84 is checked. This check is performed by C_L of the cell reproduction information table (C_PBI) 107 shown in FIG.
Start address of VOBU (C_LVOBU_SA)
And the address of the navigation pack 86 (V_PCK_
LBN). NV
If the pack 86 is final in the cell 84, it is checked whether there has been an angle change. The angle can be changed from the key operation / display unit 4 to the system CPU unit 50.
Is determined based on whether or not an angle change is input. If the angle has not been changed, it is checked whether the cell 84 is the last cell of the program chain (PGC) to which the cell 84 belongs. This check is performed as shown in FIGS. 19 and 23.
Is the cell reproduction information table (C_PB).
It is determined based on whether the cell is the last cell of (IT) 107.
That is, it is checked by the number of cells constituting the program chain and the identification number of the reproduced cell.

If the reproduction has ended, or if there is no program chain to be reproduced next, step S1
As shown in FIG. 8, the general information of the PCI 113 (PCI-G
End PTS (VOBU_EPTS) described in I)
Is referred to, and this end PTS (VOBU_EPTS)
Is equal to the system time clock (STC), the display of the screen of the monitor unit 6 is stopped as shown in step 19, and the system CPU is stopped as shown in step S20.
The data transfer stop command is given from the unit 50 to the disk drive unit 30, the data transfer is stopped, and the reproducing operation is ended.

In the process of determining the type of data, if the data is PCI data or DSI data as NV data indicating the playback position of video data, etc.
No data is transferred to the decoder, and this NV data is
The data is stored in the data RAM unit 56. This NV data is
It is referred to by the system CPU unit 50 as needed and used when performing special reproduction of video data. At this time, the PCI data and the DSI data are identified by a substream ID assigned to them.

When reproduction of one cell is completed, cell information to be reproduced next is obtained from cell reproduction order information in the program chain data, and reproduction is continued in the same manner. As described above, when a multiplexed stream is separated, the stream is first largely separated by a stream ID, and then is separated in detail by a substream ID.

That is, separation by the stream ID by the MPEG decoder LSI and the video processor LS
The sub-stream ID is divided by I. These two separations are not performed at once, but are performed separately.

Thus, in addition to MPEG video data, sub-picture data, various audio data, and the like can be handled.

In the above-described embodiment, a high-density recording type optical disk has been described as a recording medium.
The present invention provides a storage medium other than an optical disc, for example,
The present invention can also be applied to a magnetic disk or another storage medium capable of physically recording at high density.

[0183]

As described above in detail, according to the present invention, it is possible to provide a reproducing apparatus capable of handling sub-picture data, various audio data and the like in addition to MPEG video data.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing an optical disk device according to one embodiment of the present invention.

FIG. 2 is a block diagram showing details of a mechanical unit of the disk drive device shown in FIG. 1;

FIG. 3 is an exemplary perspective view schematically showing the structure of an optical disk loaded in the disk drive device shown in FIG. 1;

FIG. 4 is a diagram showing a schematic configuration of a key operation and a display unit shown in FIG. 1;

FIG. 5 is a diagram showing a schematic configuration of the remote control shown in FIG. 1;

FIG. 6 is a view showing a structure of a logical format of the optical disc shown in FIG. 3;

FIG. 7 is a view showing the structure of the video manager shown in FIG. 6;

FIG. 8 shows a video object set (VO) shown in FIG.
2 is an example showing the structure of BS).

FIG. 9 is an explanatory diagram showing the structure of the video object unit shown in FIG. 8;

FIG. 10 shows a video manager (VMG) shown in FIG.
Video manager information management table (VMGI) in I)
FIG. 6 is a diagram showing parameters and contents of (_MAT).

FIG. 11 shows a video manager (VMG) shown in FIG. 7;
Title search pointer table (TSPT) in I)
FIG.

FIG. 12 is a view showing parameters and contents of information (TSPTI) of a title search pointer table of the title search pointer table (TSPT) shown in FIG. 11;

FIG. 13 is a view showing parameters and contents of a title search pointer (TT_SRP) corresponding to an input number of the title search pointer table (TSPT) shown in FIG. 11;

FIG. 14 is a view showing the structure of the video title set shown in FIG. 6;

FIG. 15 is a diagram showing parameters and contents of a video title set information management table (VTSI_MAT) of the video title set information (VTSI) shown in FIG. 14;

16 is a diagram showing the structure of a table (VTS_PGCIT) of video title set program chain information of the video title set information (VTSI) shown in FIG.

17 is a view showing parameters and contents of information (VTS_PGCITI) of a table (VTS_PGCIT) of video title set program chain information shown in FIG. 16;

FIG. 18 is a search pointer (VTS) corresponding to the program chain in the video title set program chain information table (VTS_PGCIT) shown in FIG. 16;
_PGCIT_SRP) showing parameters and contents.

19 is a diagram showing the structure of program chain information (VTS_PGCI) for a video title set corresponding to the program chain of the video title set program chain information table (VTS_PGCIT) shown in FIG.

FIG. 20 shows the program chain information (V) shown in FIG.
TS_PGCI) General information of program chain (P
The figure which shows the parameter and content of (GC_GI).

FIG. 21 shows the program chain information (V) shown in FIG.
TS_PGCI) Program chain map (PG
FIG. 3 is a diagram showing the structure of (C_PGMAP).

22 is a view showing parameters and contents of an entry cell number (ECELLN) for a program described in a map (PGC_PGMAP) of the program chain shown in FIG. 21.

FIG. 23 shows the program chain information (V
TS_PGCI) cell reproduction information table (C_PBI)
The figure which shows the structure of T).

24 is a cell reproduction information table (C_C) shown in FIG.
The figure which shows the parameter and content of (PBIT).

FIG. 25 shows the program chain information (V
The figure which shows the structure of cell position information (C_POSI) of TS_PGCI.

26 is a diagram showing the cell position information (C_POS) shown in FIG.
The figure which shows the parameter and content of I).

FIG. 27 is a view showing the structure of the navigation pack shown in FIG. 8;

FIG. 28 is a view showing the structure of a video, audio, and sub-picture pack shown in FIG. 8;

FIG. 29 is a view showing parameters and contents of playback control information (PCI) of the navigation pack shown in FIG. 28;

30 is a view showing parameters and contents of general information (PCI_GI) in the reproduction control information (PCI) shown in FIG. 29.

FIG. 31 is a diagram showing parameters and contents of disc search information (DSI) of the navigation pack shown in FIG. 28.

FIG. 32 shows the disc search information (DS) shown in FIG.
The figure which shows the parameter and content of DSI general information (DSI_GI) of I).

FIG. 33 shows a video object (VO) shown in FIG. 31;
FIG. 6B is a diagram showing parameters and contents of synchronous reproduction information (SYNCI) of FIG.

FIG. 34 is a view for explaining an adjustment example when the adjustment data length is 7 bytes or more.

FIG. 35 is a view for explaining an example of adjustment when the adjustment data length is 6 bytes or less.

FIG. 36 is a view for explaining the configuration of a video pack.

FIG. 37 is a view for explaining the configuration of an audio pack;

FIG. 38 is a view for explaining the configuration of a sub-picture pack.

FIG. 39 is a view for explaining the configuration of a stream ID.

FIG. 40 is a view for explaining the contents of a substream ID for a private stream 1;

FIG. 41 is an exemplary view for explaining the contents of a sub-stream ID for a private stream 2;

FIG. 42 is an exemplary view for explaining the relationship between a video stream and a video pack;

FIG. 43 is an exemplary view for explaining a hierarchical structure of a video stream;

FIG. 44 is an exemplary view for explaining a pickup layer in a hierarchical structure of a video stream.

FIG. 45 is a view showing a description example of line 21 data as user data.

FIG. 46 is a view for explaining the configuration of an MPEG decoder LSI and a video processor LSI;

FIG. 47 is a view showing an example of a data transmission format of line 21 data.

FIG. 48 is a flowchart for describing a reproduction process for a multiplexed stream.

FIG. 49 is a flowchart showing a procedure of a reproduction process of video data, audio data, sub-picture data, and computer data.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 4 ... Key operation / display part 5 ... Remote control 6 ... Monitor part 8 ... Speaker part 10 ... Optical disk 50 ... System CPU part 52 ... System ROM / RAM part 54 ... System processor part 56 ... Data RAM part 57 ... MPEG decoder LSI 57A: separating unit 57B: MPEG processing unit 57C: buffer memory 58: video processor LSI 58A: video signal generating unit 58B: separating unit 58C: sub-video signal generating unit 58D: line 21 waveform generating unit 58E: combining unit 58F 58G field register 59 audio processing circuit 71 management area 72 data area 84 cell 86 navigation pack 87 video pack 88 computer data pack 90 sub-picture pack 91 audio pack 120 pack header 121 Ttohedda 131, 141, 151 ... sub-stream ID 133 ... frame data of the start address 187 ... program chain 189 ... program

Claims (14)

[Claims] 1. A plurality of data units which are to be played back in a time series, each of which is played back within a fixed time range, wherein the data unit sequence is compressed video data and at least audio data and sub-picture data. Extracting means for extracting reproduced data in pack units from a recording medium composed of a plurality of data pack sequences obtained by packetizing reproduced data including any of the data by adding a packet header; and extracting the reproduced data by the extracting means. First separating means for separating video data from other data depending on whether or not a first identifier indicating video data is added to the packet header of the pack; and separating by the first separating means. A first converting means for converting the divided video data into a reproduction signal; and a video data divided by the first dividing means. The second data for separating the external data from the sub-video data and the other data depending on whether or not a second identifier indicating the sub-video data or the audio data is added following the packet header of the pack. Dividing means; second converting means for converting the sub-picture data divided by the second dividing means into a reproduced signal; and audio data divided by the second dividing means into a reproduced signal. And a third converting means for converting. 2. A plurality of data units which are to be played back in chronological order, each of which is played back within a predetermined time range, wherein the data unit sequence is compressed video data and at least audio data and sub-picture data. Extracting means for extracting reproduced data in pack units from a recording medium composed of a plurality of data pack sequences obtained by packetizing reproduced data including any of the data by adding a packet header; and extracting the reproduced data by the extracting means. First separating means for separating video data from other data depending on whether or not a first identifier indicating video data is added to the packet header of the pack; and separating by the first separating means. A first converting means for converting the divided video data into a reproduction signal; and a video data divided by the first dividing means. The second data for separating the external data from the sub-video data and the other data depending on whether or not a second identifier indicating the sub-video data or the audio data is added following the packet header of the pack. Dividing means; second converting means for converting the sub-picture data divided by the second dividing means into a reproduction signal; reproducing signal converted by the first converting means; First reproducing means for synthesizing the reproduced signal converted by the means to reproduce a video, third converting means for converting the audio data separated by the second dividing means into a reproduced signal, And a second reproducing means for reproducing a sound using the reproduction signal converted by the third converting means. 3. A plurality of data units which are to be played back in time series, each of which is played back within a predetermined time range, wherein the data unit sequence is compressed video data and at least audio data and sub-picture data. Extracting means for extracting reproduced data in pack units from a recording medium composed of a plurality of data pack sequences obtained by packetizing reproduced data including any of the data by adding a packet header; and extracting the reproduced data by the extracting means. First separating means for separating video data from other data depending on whether or not a first identifier indicating video data is added to the packet header of the pack; and separating by the first separating means. Processing means for expanding the divided video data; and converting the video data expanded by the processing means into a reproduced signal. Data other than the video data separated by the first converting means, and a second identifier indicating sub-picture data or audio data following the packet header of the pack. A second dividing unit that separates the sub-video data from other data depending on whether or not the sub-video data is divided by the second dividing unit. A reproducing apparatus comprising: converting means; and third converting means for converting the audio data separated by the second separating means into a reproduced signal. 4. A first processing circuit is constituted by the first dividing means and the processing means, and is constituted by the first converting means, the second dividing means, and the second converting means. 4. The reproducing apparatus according to claim 3, wherein the reproducing apparatus constitutes a second processing circuit. 5. A plurality of data units which are to be played back in time series, each of which is played back within a predetermined time range, wherein the data unit sequence is compressed video data and at least audio data and sub-picture data. Extracting means for extracting reproduced data in pack units from a recording medium composed of a plurality of data pack sequences obtained by packetizing reproduced data including any of the data by adding a packet header; and extracting the reproduced data by the extracting means. First separating means for separating video data from other data depending on whether or not a first identifier indicating video data is added to the packet header of the pack; and separating by the first separating means. Processing means for expanding the divided video data; and converting the video data expanded by the processing means into a reproduced signal. Data other than the video data separated by the first converting means, and a second identifier indicating sub-picture data or audio data following the packet header of the pack. A second dividing unit that separates the sub-video data from other data depending on whether or not the sub-video data is divided by the second dividing unit. Conversion means; first reproduction means for synthesizing the reproduction signal converted by the first conversion means and the reproduction signal converted by the second conversion means to reproduce a video; A third converting means for converting the audio data separated by the dividing means into a reproduced signal; and a second reproducing means for reproducing a sound by the reproduced signal converted by the third converting means. Playback apparatus according to claim. 6. A plurality of data units which are to be played back in time series, each of which is played back within a fixed time range, wherein the data unit sequence is compressed video data and at least audio data and sub-picture data. Extracting means for extracting reproduced data in pack units from a recording medium composed of a plurality of data pack sequences obtained by packetizing reproduced data including any of the data by adding a packet header; and extracting the reproduced data by the extracting means. First separating means for separating video data from other data depending on whether or not a first identifier indicating video data is added to the packet header of the pack; and separating by the first separating means. A first converting means for converting the divided video data into a reproduction signal; and a video data divided by the first dividing means. The second data for separating the external data from the sub-video data and the other data depending on whether or not a second identifier indicating the sub-video data or the audio data is added following the packet header of the pack. Dividing means; second converting means for converting the sub-picture data divided by the second dividing means into a reproduction signal; reproducing signal converted by the first converting means; Synthesizing means for synthesizing the reproduced signal converted by the means, first reproducing means for reproducing a video by the reproduced signal synthesized by the synthesizing means, and audio data separated by the second separating means Reproduction means for converting a sound signal into a reproduction signal, and second reproduction means for reproducing sound by the reproduction signal converted by the third conversion means. Location. 7. A plurality of data units which are to be played back in time series, each of which is played back within a predetermined time range, wherein the data unit sequence is compressed video data and at least audio data and sub-picture data. Extracting means for extracting reproduced data in pack units from a recording medium composed of a plurality of data pack sequences obtained by packetizing reproduced data including any of the data by adding a packet header; and extracting the reproduced data by the extracting means. First separating means for separating video data from other data depending on whether or not a first identifier indicating video data is added to the packet header of the pack; and separating by the first separating means. Processing means for expanding the divided video data; and converting the video data expanded by the processing means into a reproduced signal. Data other than the video data separated by the first converting means, and a second identifier indicating sub-picture data or audio data following the packet header of the pack. A second dividing unit that separates the sub-video data from other data depending on whether or not the sub-video data is divided by the second dividing unit. Converting means; synthesizing means for synthesizing the reproduced signal converted by the first converting means and the reproduced signal converted by the second converting means; and reproducing a video by the reproduced signal synthesized by the synthesizing means. A first reproducing unit for converting the audio data divided by the second dividing unit into a reproduced signal; a reproduced signal converted by the third converting unit; Reproducing apparatus characterized by comprising a second reproducing means for reproducing audio, and the. 8. A first processing circuit is constituted by the first dividing means and the processing means, wherein the first converting means, the second dividing means, the second converting means, 8. The reproducing apparatus according to claim 7, wherein a second processing circuit is constituted by the combining means. 9. A plurality of data units which are to be played back in time series, each of which is played back within a predetermined time range, wherein the data unit sequence is compressed video data and at least audio data and sub-picture data. The playback data including any of the data is extracted from the recording medium composed of a plurality of data pack sequences obtained by packetizing the playback data including any of the data by adding a packet header, and video is added to the packet header of the extracted pack. The video data and the other data are separated depending on whether or not the first identifier indicating the data is given, and the separated video data is converted into a reproduction signal. Of the pack, and a second identification indicating sub-picture data or audio data following the packet header of the pack. The sub-video data is separated from the other data depending on whether or not a child is provided. The sub-video data is converted into a reproduction signal, and the audio data is converted into a reproduction signal. A reproducing method characterized by: 10. A plurality of data units to be played back in time series, each of which is played back within a predetermined time range, wherein the data unit sequence is compressed video data and at least audio data and sub-picture data. The playback data including any of the data is extracted from the recording medium composed of a plurality of data pack sequences obtained by packetizing the playback data including any of the data by adding a packet header, and video is added to the packet header of the extracted pack. The video data and the other data are separated depending on whether or not the first identifier indicating the data is given, and the separated video data is converted into a reproduction signal. The second data indicating the sub-picture data or audio data following the packet header of the pack. The sub-video data is separated from the other data depending on whether or not the discriminator is attached. The divided sub-video data is converted into a reproduction signal, and the reproduction signal of the video data and the sub-video data are converted. Reproducing the video by synthesizing the reproduction signal with the reproduction signal, converting the divided audio data into a reproduction signal, and reproducing the sound by the converted reproduction signal. 11. A plurality of data units to be played back in time series, each of which is played back within a fixed time range, wherein the data unit sequence is compressed video data and at least audio data and sub-picture data. The playback data including any of the data is extracted from the recording medium composed of a plurality of data pack sequences obtained by packetizing the playback data including any of the data by adding a packet header, and video is added to the packet header of the extracted pack. The video data and the other data are separated according to whether or not the first identifier indicating the data is assigned, the separated video data is subjected to decompression processing, and the decompressed video data is reproduced. , And the data other than the above-mentioned separated video data is added to the sub-picture following the packet header of the pack. Sub-video data and other data are separated depending on whether or not a second identifier indicating data or audio data is added, and the separated sub-video data is converted into a reproduction signal. Converting the reproduced audio data into a reproduction signal. 12. A plurality of data units to be reproduced in time series, each of which is reproduced within a fixed time range, wherein the data unit sequence is compressed video data and at least audio data and sub-picture data. The playback data including any of the data is extracted from the recording medium composed of a plurality of data pack sequences obtained by packetizing the playback data including any of the data by adding a packet header, and video is added to the packet header of the extracted pack. The video data and the other data are separated according to whether or not the first identifier indicating the data is assigned, the separated video data is subjected to decompression processing, and the decompressed video data is reproduced. And the data other than the video data that has been separated as described above is added to the packet header of the pack, Sub video data and other data are separated depending on whether or not a second identifier indicating data or audio data is given, and the separated sub video data is converted into a reproduction signal; Reproducing the video by synthesizing the reproduction signal of the sub-picture data and the reproduction signal of the sub-picture data, converting the divided audio data into a reproduction signal, and reproducing the sound by the converted reproduction signal. And the reproduction method. 13. A plurality of data units to be reproduced in time series, each of which is reproduced within a fixed time range, wherein the data unit sequence is compressed video data and at least audio data and sub-picture data. The playback data including any of the data is extracted from the recording medium composed of a plurality of data pack sequences obtained by packetizing the playback data including any of the data by adding a packet header, and video is added to the packet header of the extracted pack. The video data and the other data are separated depending on whether or not the first identifier indicating the data is given, and the separated video data is converted into a reproduction signal. The second data indicating the sub-picture data or audio data following the packet header of the pack. The sub-video data is separated from the other data depending on whether or not the discriminator is attached. The divided sub-video data is converted into a reproduction signal, and the reproduction signal of the video data and the sub-video data are converted. A video signal is reproduced by the synthesized reproduction signal, the divided audio data is converted into a reproduction signal, and a sound is reproduced by the converted reproduction signal. How to play. 14. A plurality of data units to be reproduced in time series, each of which is reproduced within a fixed time range, wherein the data unit sequence is compressed video data and at least audio data and sub-picture data. The playback data including any of the data is extracted from the recording medium composed of a plurality of data pack sequences obtained by packetizing the playback data including any of the data by adding a packet header, and video is added to the packet header of the extracted pack. The video data and the other data are separated according to whether or not the first identifier indicating the data is assigned, the separated video data is subjected to decompression processing, and the decompressed video data is reproduced. And the data other than the video data that has been separated as described above is added to the packet header of the pack, Sub video data and other data are separated depending on whether or not a second identifier indicating data or audio data is given, and the separated sub video data is converted into a reproduction signal; The reproduced signal of the sub video data and the reproduced signal of the sub-video data are combined, a video is reproduced by the combined reproduced signal, the separated audio data is converted into a reproduced signal, and the audio is converted by the converted reproduced signal. A reproduction method, characterized by: