JP3873077B2 - Optical disc playback apparatus and optical disc playback method - Google Patents

Description

  The present invention relates to an optical disc playback apparatus and an optical disc recording method for appropriately playing back playback data using video attribute information of playback data, and particularly suitable for a playback system by acquiring playback data having specific video attributes. The present invention relates to an optical disc reproducing apparatus and an optical disc recording method capable of converting into various reproduction data.

  In recent years, a moving image-compatible optical disk reproducing apparatus for reproducing an optical disk in which data such as video (video data) and audio (audio data) is digitally recorded has been developed. ing.

  As a generally known optical disk, a compact disk, so-called CD, has already been developed, but it is difficult to record and reproduce movie data over a long period of time from the viewpoint of the storage capacity of such an optical disk. It is said that. From this point of view, optical discs capable of recording movie data with high density are being researched and developed.

  With the advent of such high-density recordable optical discs, it becomes possible to record a plurality of selectable video data and the like on such an optical disc, and by recording a plurality of audio streams, Different audio can be associated with one video, and by recording a plurality of sub-picture streams, for example, subtitles with different language types can be selected and displayed.

  In recent years, a data compression system for moving images has been internationally standardized as an MPEG (Moving Picture Expert Group) system. This MPEG system is a system for variably compressing video data. In addition, the MPEG2 system is now being internationally standardized, and accordingly, a system format corresponding to the MPEG2 compression system is also defined as an MPEG2 system layer. As the system layer, frame rate information, display aspect ratio, and the like are defined as data when video data is displayed.

  However, when the video data compressed by the decoder corresponding to MPEG2 is expanded, if the source frame rate and the display frame rate are different, or if the source aspect ratio and the display aspect ratio are different, the display as the source is performed. It is necessary to perform conversion suitable for the device. However, conventionally, there is a problem that only the display conversion defined in the MPEG2 system layer can be performed, the video data output method cannot be changed, and the video data cannot be used effectively.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to arbitrarily output a video data based on a video data attribute assigned to the video data when displaying the video data. It is in providing the reproducing | regenerating apparatus which can be changed.

  Another object of the present invention is to provide a recording method for an optical disc capable of arbitrarily changing the video data output method when displaying the video data based on the video data attribute assigned to the video data. There is to do.

According to this invention,
Display the video manager menu by referring to the start address of the video object set for the video manager menu from the video manager as the management area of the optical disc,
Referring to the title search pointer table of the video manager, obtain a start address of a video title set related to the video title stored on the optical disc,
Obtaining video title set information about the video title set from the video title set;
Obtaining a video title set information management table from the video title set information to obtain a video object set for the video title set menu and a start address of the video object set for the title of the video title set;
In the optical disc playback apparatus for displaying the video object set for the video title set menu from the start address and playing the video object set for the title of the video title set,
Video decoding means for decoding video data included in the menu and title video object sets;
Audio data decoding means for decoding an audio data stream included in the menu and title video object sets;
Sub-picture data decoding means for decoding a sub-picture data stream included in the menu and title video object sets;
Video output means for synthesizing the video output and the sub video output from the video decoding means and the sub video data decoding means, converting the video output to a video signal, and outputting the video signal;
Audio output means for converting the audio output from the audio data decoding means into an audio signal and outputting the audio signal;
Video data attribute for video manager menu including video compression mode and display aspect ratio, audio stream attribute for video manager menu including audio coding mode and sub-picture from the video manager for playback of video object set for the video manager menu A video manager menu sub-picture stream attribute including a coding mode is obtained, and the video decoding means, the audio data decoding means and the sub-picture data decoding means are set based on these, and according to these attributes, the video data, audio data stream and Decode the sub-picture data stream,
For reproducing the video object set for the video title set menu, from the video title set information management table, video data attributes for the video title set menu including a video compression mode and a display aspect ratio, and an audio stream for the video title set menu including an audio coding mode. The video title set menu sub-picture stream attributes including attributes and sub-picture coding mode are acquired and the video decoding means, the audio data decoding means and the sub-picture data decoding means are set based on these, and video data according to these attributes, Decode audio data stream and sub-picture data stream,
Video attributes for title including video compression mode and display aspect ratio, audio stream attributes for title including audio coding mode and sub-picture coding from the video title set information management table for playback of the video object set for title The sub-picture stream attribute for the title including the mode is acquired, and the video decoding means, the audio data decoding means and the sub-picture data decoding means are set based on these, and the video data, the audio data stream and the sub-picture are set according to these attributes. Setting means for decoding the data stream;
There is provided an optical disk reproducing device characterized by comprising:

Moreover, according to this invention,
Display the video manager menu by referring to the start address of the video object set for the video manager menu from the video manager as the management area of the optical disc,
Referring to the title search pointer table of the video manager, obtain a start address of a video title set related to the video title stored on the optical disc,
Obtaining video title set information about the video title set from the video title set;
Obtaining a video title set information management table from the video title set information to obtain a video object set for the video title set menu and a start address of the video object set for the title of the video title set;
In the playback method of the optical disk for displaying the video object set for the video title set menu from the start address and playing the video object set for the title of the video title set,
For playback of the video object set for the video manager menu, video data attributes for the video manager menu including a video compression mode and a display aspect ratio, audio stream attributes for the video manager menu including an audio coding mode, and sub-video from the video manager. A sub-picture stream attribute for a video manager menu including a video coding mode is acquired, and video data included in a video object set for the video manager menu is decoded according to these attributes to output a video, for the video manager menu The audio data stream included in the video object set is decoded to output audio, and the video option for the video manager menu is output. Decode the sub-picture data stream included in the object set and output the sub-picture, synthesize the video output and sub-picture output, convert to the video signal and output, and convert the audio output to the audio signal and output And
In the reproduction of the video object set for the video title set menu, the video title set menu audio data including the video compression mode and the display aspect ratio, the video title set menu video data attributes including the video coding mode, and the audio coding mode are reproduced from the video title set information management table. Subtitle stream attributes for a video title set menu including attributes and subpicture coding modes are acquired, and video data included in the video object set for the video title set menu is decoded according to these attributes to output video, and the video The audio data stream included in the video object set for the title set menu is decoded to output audio, and the video is The sub-picture data stream included in the video object set for the title set menu is decoded to output a sub-picture, the video output and the sub-picture output are combined and converted into a video signal, and the audio output is converted into an audio signal. Converted to
For playback of the video object set for the title, the video attribute for the title including the video compression mode and the display aspect ratio, the audio stream attribute for the title including the audio coding mode, and the sub-picture from the video title set information management table. Subtitle stream attributes for the title including the coding mode are acquired, and according to these attributes, video data included in the video object set for the title is decoded to output video, and included in the video object set for the title The audio data stream is decoded to output audio, the sub video data stream included in the title video object set is decoded to output sub video, and the video output and sub video output are Form and outputs the converted video signal, an optical disk reproducing method, characterized in that to converts the audio output into an audio signal.

  According to the reproducing apparatus and the recording method of the present invention, when video data is displayed, the video data output method can be arbitrarily changed based on the video data attribute assigned to the video data.

  Hereinafter, an optical disk and an optical disk reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a block of an optical disc reproducing apparatus for reproducing data from an optical disc according to an embodiment of the present invention. FIG. 2 shows a block of a disc drive unit for driving the optical disc shown in FIG. 3 and 4 show the structure of the optical disc shown in FIGS. 1 and 2.

  As shown in FIG. 1, the optical disc playback apparatus includes a key operation / display unit 4, a monitor unit 6, and a speaker unit 8. Here, the recorded data is reproduced from the optical disc 10 when the user operates the key operation / display unit 4. The recording data includes video data, sub-picture data, and audio data, which are converted into a video signal and an audio signal. The monitor unit 6 displays video using a video signal, and the speaker unit 8 generates sound using the audio signal.

  As already known, the optical disk 10 has various structures. As this optical disk 10, for example, as shown in FIG. 3, there is a read-only disk on which data is recorded at a high density. 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 disc 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. The disk layer 18 is disposed so that the light reflecting layer 16 is in contact with the adhesive layer 20. The optical disc 10 is provided with a center hole 22, and a clamping region 24 for holding the optical disc 10 at the time of rotation is provided around the center holes 22 on both sides. The spindle of the spindle motor 12 shown in FIG. 2 is inserted into the center hole 22 when the disc 10 is loaded in the optical disc apparatus, and the disc 10 is clamped in its clamping region 24 while the disc is rotated. Is done.

  As shown in FIG. 3, the optical disk 10 has an information area 25 in which information can be recorded on the optical disk 10 around the clamping areas 24 on both sides thereof. Each information area 25 is defined as a lead-out area 26 in which information is not normally recorded in the outer peripheral area, and a lead-in area 27 in which information is not normally recorded in the inner peripheral area in contact with the clamping area 24. Further, a data recording area 28 is defined between the lead-out area 26 and the lead-in area 27.

  In the recording layer 16 of the information area 25, tracks are usually formed continuously in a spiral as data recording areas, and the continuous tracks are divided into a plurality of physical sectors. A serial number is assigned and data is recorded with reference to this sector. The data recording area 28 of the information recording area 25 is an actual data recording area. As will be 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, a pit row is formed in advance on a transparent substrate 14 with a stamper, a reflective layer is formed on the surface of the transparent substrate 14 on which the pit row is formed, and the reflective layer is formed as a recording layer 16. Will be. Further, in this read-only optical disc 10, a groove as a track is usually not provided, 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 apparatus 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, a video decoder unit 58, and an audio decoder. Section 60, sub-picture decoder section 62, D / A and data reproduction section 64.

  As shown in FIG. 2, the disk drive unit 30 includes a motor drive circuit 11, a spindle motor 12, an optical head 32 (ie, an optical pickup), a feed motor 33, a focus circuit 36, a feed motor drive circuit 37, and a tracking circuit 38. The head amplifier 40 and the servo processing circuit 44 are provided. The optical disk 10 is placed on a spindle motor 12 driven by a motor drive circuit 11 and rotated by the spindle motor 12. An optical head 32 that irradiates the optical disk 10 with a laser beam is placed under the optical disk 10. The optical head 32 is placed on a guide mechanism (not shown). A feed motor drive circuit 37 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 that faces the optical disk 10. The objective lens 34 is moved along its optical axis according to the drive signal supplied from the focus circuit 36.

  In order to reproduce data from the optical disc 10 described above, the optical head 32 irradiates the optical disc 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 in accordance with the drive signal supplied from the tracking circuit 38. The objective lens 34 is finely moved along the direction of the optical axis in accordance with the drive signal supplied from the focusing circuit 36 so that the focal point thereof is positioned on the recording layer 16 of the optical disc 10. As a result, the laser beam forms a minimum beam spot on the spiral track (ie, pit row), and the track is tracked with the light beam spot. The laser beam is reflected from the recording layer 16 and returned to the optical head 32. The optical head 32 converts the light beam reflected from the optical disc 10 into an electrical signal, and this electrical signal is supplied from the optical head 32 to the servo processing circuit 44 via the head amplifier 40. The servo processing circuit 44 generates a focus signal, a tracking signal, and a motor control signal from the electrical signal, and supplies these signals to the focus circuit 36, the tracking circuit 38, and the motor drive circuit 11, respectively.

  Accordingly, the objective lens 34 is moved along its optical axis and the radial direction of the optical disc 10, its focal point is positioned on the recording layer 16 of the optical disc 10, and the laser beam forms a minimum beam spot on the spiral track. Further, the spindle motor 12 is rotated at a predetermined rotational speed by the motor drive circuit 11. As a result, the pit row of the optical disc 10 is tracked with the light beam 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 head movement signal is supplied from the servo processing circuit 44 to the feed motor drive circuit 37, and this circuit 37 supplies the drive signal to the feed motor 33. Accordingly, the feed motor 33 is driven, and the optical head 32 is moved along the radial direction of the optical disc 10. Then, a predetermined sector formed on the recording layer 16 of the optical disc 10 is accessed by the optical head 32. The reproduction 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 reproduction 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 system ROM and RAM unit 52. The stored reproduction data is processed by the system processor unit 54 and classified into video data, audio data, and sub-picture data. The video data, audio data, and sub-picture data are divided into a video decoder unit 58 and an audio decoder unit 60, respectively. And output to the sub-picture decoder unit 62 for decoding. The decoded video data, audio data, and sub-picture data are converted into video signals and audio signals as analog signals by the D / A and reproduction processing circuit 64, and the video signals are sent to the monitor 6 and the audio signals are sent to speakers. Part 8 is supplied to each. As a result, the video is displayed on the monitor unit 6 by the video signal and the sub-picture signal, and the sound is reproduced from the speaker unit 8 by the audio signal.

  The detailed operation of the optical disk apparatus shown in FIG. 1 will be described later in detail with reference to the 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 disc 10 shown in FIG. 1 has a volume and file structure as shown in FIG. This structure is defined in conformity with a specific standard as a logical format, for example, micro UDF and ISO9660. As described above, the data recording area 28 is physically divided into a plurality of sectors, and serial numbers are assigned to the physical sectors. In the following description, the logical address means a logical sector number (LSN) as defined by micro UDF and ISO 9660, and the logical sector is 2048 bytes as well as the size of the physical sector. A serial number is added to the number (LSN) together with the ascending order of physical sector numbers.

  As shown in FIG. 4, this volume and file structure has a hierarchical structure, and is a volume and file structure area 70, a video manager (VMG) 71, at least one video title set (VTS) 72, and other recording areas. 73. These areas are partitioned on logical sector boundaries. Here, as in the conventional CD, one logical sector is defined as 2048 bytes. Similarly, one logical block is also defined as 2048 bytes, and thus one logical sector is defined as one logical block.

  The file structure area 70 corresponds to a management area defined in the micro UDF and ISO 9660, and the video manager 71 is stored in the system ROM / RAM unit 52 through the description of this area. The video manager 71 describes information for managing a video title set as described with reference to FIG. 5 and includes a plurality of files 74 starting from a file # 0. Each video title set (VTS) 72 stores compressed video data, audio data, sub-picture data, and reproduction information thereof, as will be described later, and similarly includes a plurality of files 74. . Here, the plurality of video title sets 72 is limited to a maximum of 99, and the number of files 74 (File #j to File # j + 11) constituting each video title set 72 is determined to be a maximum of 12. It has been. These files are similarly divided at logical sector boundaries.

  In the other recording area 73, information that can use the video title set 72 described above is recorded. The other recording area 73 is not necessarily provided.

  As shown in FIG. 5, the video manager 71 includes three items, each corresponding to each file 74. That is, the video manager 71 includes video manager information (VMGI) 75, a video object set (VMGM_VOBS) 76 for the video manager menu, and a backup (VMGI_BUP) 77 of the video manager information. Here, the video manager information (VMGI) 75 and the video manager information backup 77 (VMGI_BUP) 77 are indispensable items, and the video object set (VMGM_VOBS) 76 for the video manager menu is optional. This VMGM video object set (VMGM_VOBS) 76 stores video data, audio data, and sub-picture data of a menu related to a volume in the optical disc managed by the video manager 71.

  The video object set (VMGM_VOBS) 76 for VMGM displays a description of the volume name of the optical disc, the audio accompanying the volume name display, and the description of the audio and sub-video, and the selectable items are the sub items. Displayed in video. For example, the video object set (VMGM_VOBS) 76 for VMGM indicates that the video data stores the game up to the boxer's world championship where the optical disc is, that is, the boxer X together with the volume name such as the glory history of the boxer X. The fighting pose is played back with video data, his theme song is displayed as audio, and his chronology is displayed as a sub-picture. In addition, you will be asked whether you want to select the language for the game narration, such as English or Japanese, and whether to display subtitles in other languages in the sub-picture, or which language subtitles to select You are asked whether or not. With this VMGM video object set (VMGM_VOBS) 76, for example, the user is ready to watch the video of the boxer X game by adopting Japanese subtitles as sub-pictures in English.

  Here, the structure of the video object set (VOBS) 82 will be described with reference to FIG. FIG. 6 shows an example of a video object set (VOBS) 82. The video object set (VOBS) 82 includes three types of video object sets (VOBS) 76, 95, and 96 for two menus and titles. That is, as described later, the video object set (VOBS) 82 includes the video title set menu video object set (VTSM_VOBS) 95 and the titles of at least one video title set in the video title set (VTS) 72. There is a video object set (VTSTT_VOBS) 96 for this purpose, and each video object set 82 has the same structure except for its use.

  As shown in FIG. 6, the video object set (VOBS) 82 is defined as a set of one or more video objects (VOB) 83, and the video objects 83 in the video object set (VOBS) 82 are used for the same purpose. Is done. Normally, the 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 (VTSTT_VOBS) 82 for the title set is usually composed of a plurality of video objects (VOB) 83.

  Here, taking the boxing video mentioned above as an example, the video object (VOB) 83 corresponds to the video data of each match of the boxer X. By specifying the video object (VOB), for example, the world champion The eleventh round to challenge can be reproduced on video. In addition, the menu video object set (VTSM_VOBS) 95 of the video title set 72 stores the menu data of the game of the boxer X, and according to the display of the menu, the eleventh to challenge a specific game, for example, the world championship. You can specify a battle. In a normal one-story movie, one video object (VOB) 83 corresponds to one video object set (VOBS) 82, and one video stream is completed with one video object set (VOBS) 82. In addition, in 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 related to the video stream are also completed in each video object (VOB) 83.

  The video object (VOB) 83 is assigned an identification number (IDN #j), and the video object (VOB) 83 can be specified by this identification number. A video object (VOB) 83 is composed of one or a plurality of cells 84. A normal video stream is composed of a plurality of cells, but a video stream for a menu, that is, a video object (VOB) 83 may be composed of one cell 84. Similarly, an identification number (C_IDN #j) is assigned to the cell, and the cell 84 is specified by this cell identification number (C_IDN #j).

  As shown in FIG. 6, 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 row having one navigation pack (NV pack) 86 at the head. That is, the video object unit (VOBU) 85 is defined as a collection 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), and the playback time is 0.4 seconds. This is determined so that it is not greater than 1 second. In MPEG, 1 GOP is normally defined as compressed screen data for reproducing about 15 images during 0.5 seconds.

  As shown in FIG. 6, when the video object unit includes video data, the video object unit includes a video pack (V pack) 88, a sub-picture pack (SP pack) 90, and an audio pack (A pack) 91 defined in the MPEG standard. A video data stream is formed by arranging GOPs to be arranged. A video object unit (VOBU) 85 is determined on the basis of the GOP playback time regardless of the number of GOPs. A navigation pack (NV pack) 86 is arranged. Further, even in the reproduction data of only audio and / or sub-picture data, the reproduction data is configured with this video object unit as one unit. That is, even if a video object unit is composed of only audio packs, an audio pack to be played within the playback time of the video object unit to which the audio data belongs is stored in the video object unit in the same way as a video object of video data. The

  The video manager 71 will be described again with reference to FIG. The video management information 75 arranged at the head of the video manager 71 includes video information such as information on the video manager itself, information for searching for a title, information for playback of a video manager menu, and video title attribute information. Information for managing the title set (VTS) 72 is described, and three tables 78, 79, and 80 are recorded in the order shown in FIG. Each of the tables 78, 79, 80 coincides with the boundary of the logical sector. The first table, the video management information management table (VMGI_MAT) 78, is an essential table, the size of the video manager 71, the start address of each information in the video manager 71, and the video object set for the video manager menu ( (VMGM_VOBS) 76, the start address, its attribute information, and the like are described. As will be described in detail later, this attribute information includes video attribute information, audio attribute information, and sub-picture attribute information. The mode of the decoders 58, 60, and 62 is changed by these attribute information, and the video object set. (VMGM_VOBS) 76 is played in an appropriate mode.

  The title search pointer table (TT_SRPT) 79, which is the second table of the video manager 71, is included in the volume in the optical disc 10 that can be selected according to the input of the device key and the title number from the display unit 4. The start address of the video title set to be recorded is described.

  The video title set attribute table (VTS_ATRT) 80, which is the third table of the video manager 71, describes attribute information defined for the video title set (VTS) 72 in the volume of the optical disc. That is, as attribute information, the number of video title sets (VTS) 72, the number of video title sets (VTS) 72, video attributes, for example, video data compression method, audio stream attributes, eg, audio encoding mode, etc. The sub-picture attributes such as the sub-picture display type are described in this table.

  Details of description contents described in the volume management information management table (VMGI_MAT) 78, the title search pointer table (TT_SRPT) 79, and the video title set attribute table (VTS_ATRT) 80 will be described below with reference to FIGS. .

  As shown in FIG. 7, the volume management information management table (VMGI_MAT) 78 includes the video manager 71 identifier (VMG_ID) and the number of logical blocks (one logical block is 2048 bytes as described above). The size (VMGI_SZ), the optical disc, commonly known as a digital versatile disc (digital versatile disc: hereinafter simply referred to as DVD), the version number (VERN) and the video manager 71 category (VMG_CAT) are described.

  Here, in the category (VMG_CAT) of the video manager 71, a flag indicating whether or not this DVD video directory is prohibited from copying is described. This table (VMGI_MAT) 78 includes a volume set identifier (VLMS_ID), the number of video title sets (VTS_Ns), an identifier of the supplier of data recorded on this disc (PVR_ID), and a video manager menu. The start address (VMGM_VOBS_SA) of the video object set (VMGM_VOBS) 76, the end address (VMGI_MAT_EA) of the volume manager information management table (VMGI_MAT) 78, and the start address (TT_SRPT_SA) of the title search pointer table (TT_SRPT) 79 are described. . If there is no VMG menu video object set (VMGM_VOBS) 95, “00000000h” is described in its start address (VMGM_VOBS_SA). The end address (VMGI_MAT_EA) of VMGI_MAT78 is described by the relative number of bytes from the beginning of VMGI_MAT78, and the start address (TT_SRPT_SA) of TT_SRPT79 is described by the number of relative logical blocks from the first logical block of VMGI75. Yes.

  Further, in this table 78, the start address (VTS_ATRT_SA) of the attribute table (VTS_ATRT) 80 of the video title set (VTS) 72 is described in the relative number of bytes from the first byte of the VMGI manager table (VMGI_MAT) 71, The video attribute (VMGM_V_ATR) of the video manager menu (VMGM) video object set 76 is described. Furthermore, this table 78 includes the number of audio streams of the video manager menu (VMGM) (VMGM_AST_Ns), the attribute of the audio stream of the video manager menu (VMGM) (VMGM_AST_ATR), and the sub-video stream of the video manager menu (VMGM). The number (VMGM_SPST_Ns) and the video manager menu (VMGM) sub-picture stream attribute (VMGM_SPST_ATR) are described.

  In the video attribute (VMGM_V_ATR), the compression mode, the frame rate, the display aspect ratio, and the display are set as the video object set 76 video attributes in the video manager menu (VMGM) from bit number b8 to bit number b15 as shown in FIG. The mode is described, and bit number b0 to bit number b7 are reserved for future use as a reservation. When “00” is described in the bit numbers b15 and b14, it means that the menu video data is compressed in the video compression mode based on the MPEG-1 standard, and the bit numbers b15 and b14 indicate “ When 01 "is described, it means that the menu video data is compressed in the video compression mode based on the MPEG-2 standard, and other descriptions are reserved for future use. Yes. When “00” is described in the bit numbers b13 and b12, it means that the menu video data has a frame rate (29.27 / S) at which 29.27 frames are reproduced every second. That is, when “00” is described in bit numbers b13 and b12, the menu video data is video data for a TV system adopting the NTSC system, and one frame is scanned at a horizontal scanning frequency of 60 Hz. This means that a frame rate drawn with 525 lines is adopted. In addition, when “01” is described in the bit numbers b13 and b12, it means that the menu video data has a frame rate (25 / S) at which 25 frames are reproduced per second. That is, it means that the video data for the TV system adopting the PAL system is adopted, and a frame rate is used in which one frame is drawn at a frequency of 50 Hz and 625 scanning lines. Other descriptions of bit numbers b13 and b15 are reserved for future use as reservations.

  Further, when “00” is described in the bit numbers b11 and b10, the menu video data means that the display aspect ratio (vertical / horizontal ratio) is 3/4, and the bit number When “11” is described in b11 and b10, the menu video data means that the display aspect ratio (vertical / horizontal ratio) is 9/16, and other descriptions will be reserved in the future. It is vacated for.

  Further, when the display aspect ratio is 3/4, that is, when “00” is described in the bit numbers b11 and b10, “11” is described in the bit numbers b9 and b8. When the display aspect ratio is 9/16, that is, when “11” is described in the bit numbers b11 and b10, the video data for menu is allowed to be displayed in pan scan and / or letterbox. It is described whether or not. That is, when “00” is described in the bit numbers b9 and b8, it means that display is allowed in both pan scan and letterbox, and “01” is permitted in the bit numbers b9 and b8. When it is described, it means that display in pan scan is permitted, but display in letterbox is prohibited. In addition, when “10” is described in the bit numbers b9 and b8, it means that display in pan scan is prohibited but display in letterbox is permitted. When “11” is described in the bit numbers b9 and b8, it means that it is not particularly specified.

  FIG. 9 shows the relationship between the video data recorded on the optical disc described above and the reproduced screen image on the TV monitor 6. Regarding the video data, since the display aspect ratio is described in the bit numbers b11 and b10 and the display mode is described in the bit numbers b9 and b8 as the attribute information, the display as shown in FIG. 9 is performed. Image data having an original display aspect ratio (bit numbers b11 and b10 of “00”) of 3/4 is compressed and recorded as it is. That is, as shown in FIG. 9, the image data in which a circle is drawn at the center and four small circles are arranged around the circle, the display mode is normal (bit numbers b9 and b8 are “00”), pan scan (bit Whether the numbers b9 and b8 are "01") or letterbox (bit numbers b9 and b8 are "10"), the TV monitor 6 having a TV aspect ratio of 3/4 is left as it is without changing the display form. A circle is drawn at the center and displayed as an image in which four small circles are arranged around it. Further, the image data is displayed as an image in which a circle is drawn at the center without changing the display form even on the TV monitor 6 having a TV aspect ratio of 9/16, and four small circles are arranged around it. Thus, only an area where no image is displayed is generated on both sides of the screen of the TV monitor 6.

  In contrast, image data having a display aspect ratio (bit numbers b11 and b10 of “11”) of 9/16 is compressed and recorded in a state of being transformed into a vertically long display so as to have an aspect ratio of 3/4. ing. That is, a 9/16 display having one large circle and eight small circles, in which a circle is originally drawn at the center, four small circles are arranged around the circle, and a small circle is arranged outside the small circle. An image having an aspect ratio is compressed and recorded as data in which all circles are transformed into a vertically long display. Therefore, when the display mode is normal (bit numbers b9 and b8 are “00”), a vertically long circle is drawn at the center of the TV monitor 6 having a TV aspect ratio of 3/4 without changing the display form. Four vertically small circles are arranged, and the image is displayed as an image having one large circle and eight small circles in which the vertically small circles are arranged outside the small circle. On the other hand, when the display mode is pan scan (bit numbers b9 and b8 are “01”), the shape of the circle is not vertically long but is drawn as an original circle, but the periphery of the screen is trimmed. Then, a small circle outside the small circle is cut, a circle is drawn at the center, and an image in which four small circles are arranged around the circle is displayed on the TV monitor 6 having a TV aspect ratio of 3/4. In addition, when the display mode is letterbox (bit numbers b9 and b8 are “10”), the aspect ratio does not change. Therefore, the shape of the circle is not a vertically long shape, but is drawn as an original circle. The screen, that is, one large circle and eight small circles are displayed, but the upper and lower areas on the screen are displayed on the TV monitor 6 having a TV aspect ratio of 3/4 in a state where no image is displayed. . As a matter of course, the TV monitor 6 having a TV aspect ratio of 9/16 matches the display aspect ratio of the image data (bit numbers b11 and b10 are “11”), so a normal circle is drawn at the center as it is. , Four normal small circles are arranged around it, and the image is displayed as an image having one large circle and eight small circles in which normal small circles are similarly arranged outside the small circles.

  As described above, when displaying image data having a display aspect ratio (bit numbers b11 and b10 of “11”) of 9/16 on the TV monitor 6 having a TV aspect ratio of 3/4, In the area, there is a portion where an image is not displayed. In this portion, a frame rate at which one frame is drawn with a horizontal scanning frequency of 60 Hz and 525 scanning lines (“01” is described in bit numbers b13 and b12). In this case, as shown in FIG. 10A, the upper and lower 72 horizontal scanning lines draw black (Y = 16, U = V = 128) and are displayed as black. In addition, in the case of a frame rate in which one frame is drawn at a frequency of 50 Hz and the number of scanning lines is 625 (“00” is described in bit numbers b13 and b12), this portion is vertically 60 as shown in FIG. 10A. These horizontal scanning lines draw black (Y = 16, U = V = 128), and are similarly displayed as black.

  The contents of the table shown in FIG. 7 will be described again. In the audio stream attribute (VMGM_AST_ATR) of the video manager menu (VMGM), as shown in FIG. 11, the audio coding mode, audio type, audio application ID, quantization, sampling frequency and the bit number b63 to bit number b48 are shown. The number of audio channels is described, and bit number b47 to bit number b0 are reserved for future use. If the VMGM video object set 76 does not exist, or if there is no audio stream in the video object set, “0” is described in each bit from bit number b63 to bit number b0. The audio coding mode is described from bit number b63 to bit number b61. When “000” is described in this audio coding mode, it means that the audio data is coded by Dolby AC-3 (trademark of Dolby Laboratories Licensing Corporation), and “010” is set in the audio coding mode. When it is described, it means that the audio data is compressed by MPEG-1 or MPEG-2 without an extension bit stream. Further, when “011” is described in the audio coding mode, it means that the audio data is compressed by MPEG-2 with the extension bit stream, and “100” is described in the audio coding mode. In this case, it means that audio data is coded by linear PCM. For audio data, other descriptions are reserved for future use. In the case of a frame rate (“00” is described in bit numbers b13 and b12 in VMGM_V_ATR) in which one frame is drawn with a horizontal scanning frequency of 60 Hz and 525 scanning lines in the video data attribute, Dolby AC-3 ( Bit number b63, b62, b61 is “000”) or linear PCM (bit number b63, b62, b61 is “100”) should be set. In addition, in the video data attribute, when a frame rate (drawing “00” in bit bit numbers b13 and b12 in VMGM_V_ATR) in which one frame is drawn at a frequency of 50 Hz and 625 scanning lines, MPEG-1, MPEG-2 (bit numbers b63, b62, and b61 are “010” or “011”) or linear PCM (bit numbers b63, b62, and b61 are “100”) should be set.

  The audio type is described in bit numbers b59 and b58. If not specified, “00” is described, and the others are reserved. The ID of the audio application field is described in bit numbers b57 and b56. If not specified, “00” is described, and others are reserved. Further, regarding the quantization of audio data, it is described in bit numbers b55 and b54. When the bit numbers b55 and b54 are “00”, it means that the audio data is quantized with 16 bits. When b55 and b54 are “01”, it means that the audio data is quantized with 20 bits. When the bit numbers b55 and b54 are “10”, the audio data is quantized with 24 bits. This means that the bit number b55, b54 is “11” and is not specified. Here, when the audio coding mode is set to linear PCM (bit numbers b63, b62, b61 are “100”), quantization is not specified (bit numbers b55, b54 are “11”). Is done. The audio data sampling frequency Fs is described in bit numbers b53 and b52. When the sampling frequency Fs is 48 kHz, “00” is described, and when the sampling frequency Fs is 96 kHz, “01”. Is described, and others are reserved.

  The number of audio channels is described in bit numbers b50 to b48, and when the bit numbers b50, b49, and b48 are '000', it means one channel (monaural) and the bit numbers b50, b49, When b48 is “0001”, it means that there are 2 channels (stereo), and when bit number b50, b49, b48 is “010”, it means that there are 3 channels. This means that if the bit number b50, b49, b48 is “011”, it means 4 channels, and if the bit number b50, b49, b48 is “100”, it is 5 channels. If the bit numbers b50, b49, b48 are “101”, it means that there are 6 channels, When the number b50, b49, b48 is “110”, it means 7 channels, and when the bit number b50, b49, b48 is “111”, it means 8 channels. ing.

  The sub-picture stream attribute (VMGM_SPST_ATR) in the video manager menu (VMGM) of the table shown in FIG. 7 includes sub-picture coding mode, sub-picture display type from bit number b47 to bit number b40 as shown in FIG. A sub-picture type is described. When “000” is described in the bit numbers b47, b46, and b45 as the description of the sub-picture coding mode, it is described that the sub-picture data is run-length compressed based on the 2-bit / pixel type standard. When “001” is described in the bit numbers b47, b46, and b45 as the description of the sub-picture coding mode, it is described that the sub-picture data is run-length compressed based on other standards. Others are reserved.

  The sub-picture display type is described in bit numbers b44, b43, and b42. When the display aspect ratio in VMGM_V_ATR is 3/4 (bit numbers b11 and b10 are “00”), the bit numbers b44, b43, and b42 are , “000” is described, and this attribute information means that it is not used. Also, when the display aspect ratio in VMGM_V_ATR is 9/16 (bit numbers b11 and b10 are “11”) and bit numbers b44, b43 and b42 are “001”, this sub-picture stream is only displayed in wide display. When the bit numbers b44, b43, and b42 are “010”, this means that this sub-picture stream only allows letterbox display, and the bit numbers b44, b43, and b42 are “011”. In this case, this sub-picture stream means that this sub-picture stream allows both wide display and letterbox display. When bit numbers b44, b43, and b42 are “100”, this sub-picture stream is This means that this sub-picture stream only allows pan scan display, and bit numbers b44, b43 and b42 are “110”. The sub-picture stream permits both pan scan display and letter box display. When the bit numbers b44, b43, and b42 are "111", the sub-picture stream is displayed in pan scan display. This means that all letterbox display and wide display are allowed. Further, the sub-picture type is described in the bit numbers b41 and b40, and when the bit numbers b41 and b40 are “00”, it is not specified and the others are reserved.

  The structure shown in FIG. 5 will be described again. In the title search pointer table (TT_SRPT) 79 shown in FIG. 5, information (TSPTI) of the title search pointer table is first described as shown in FIG. 13, and then titles corresponding to input numbers 1 to n (n ≦ 99) are entered. The necessary number of search pointers (TT_SRP) are continuously described. When only one title of playback data, for example, one title of video data is stored in the volume of this optical disc, only one title search pointer (TT_SRP) 93 is described in this table (TT_SRPT) 79.

  In the title search pointer table information (TSPTI) 92, as shown in FIG. 14, the number of entry program chains (EN_PGC_Ns) and the end address (TT_SRPT_EA) of the title search pointer (TT_SRP) 93 are described. This address (TT_SRPT_EA) is described by the relative number of bytes from the first byte of the title search pointer table (TT_SRPT) 79. Further, as shown in FIG. 15, each title search pointer (TT_SRP) describes a video title set number (VTSN), a program chain number (PGCN), and a start address (VTS_SA) of the video title set 72.

  A video title set (VTS) 72 to be reproduced and a program chain (PGC) are specified by the contents of the title search pointer (TT_SRP) 93, and a storage position of the video title set 72 is specified. The start address (VTS_SA) of the video title set 72 describes the title set specified by the video title set number (VTSN) in the number of logical blocks.

  Here, the program chain 87 is defined as a set of programs 89 that reproduce a story of a certain title as shown in FIG. In the menu program chain, a still picture or moving picture program is reproduced one after another to complete one title menu. In the title set program chain, a chapter with a certain story consisting of a plurality of programs corresponds to the program chain, and a movie of one title is completed by continuously reproducing the program chain. As shown in FIG. 16, each program 89 is defined as a set of already described cells 84 arranged in the reproduction order.

  As shown in FIG. 5, the video title set attribute table (VTS_ATRT) 80 describing the attribute information of the video title set (VTS) 72 is video title set attribute table information (VTS_ATRTI) 66, n video title set attribute search pointers. (VTS_ATR_SRP) 67 and n video title set attributes (VTS_ATR) 68, which are described in that order. The information of this table 80 is described in the video title set attribute table information (VTS_ATRTI) 66, and the video title set attribute search pointer (VTS_ATR_SRP) 67 is described in the order corresponding to the title sets from # 1 to #n. Similarly, there is a description regarding a pointer for searching for the video title set attribute (VTS_ATR) 68 described in the order corresponding to the title sets from # 1 to #n. Each of the video title set attributes (VTS_ATR) 68 describes the attributes of the corresponding title set (VTS).

  More specifically, in the video title set attribute table information (VTS_ATRTI) 66, the number of video titles is described as a parameter (VTS_Ns) as shown in FIG. 18, and the end of the video title set attribute table (VTS_ATRT) 80 is displayed. The address is described as a parameter (VTS_ATRT_EA). Further, as shown in FIG. 19, each video title set attribute search pointer (VTS_ATR_SRP) 67 describes the start address of the corresponding video title set attribute (VTS_ATR) 68 as a parameter (VTS_ATR_SA). Furthermore, in the video title set attribute (VTS_ATR) 68, as shown in FIG. 20, the end address of the video title set attribute (VTS_ATR) 68 is described as a parameter (VTS_ATR_EA), and the category of the corresponding video title set is a parameter ( VTS_CAT). Furthermore, the video title set attribute (VTS_ATR) 68 describes attribute information of the corresponding video title set as a parameter (VTS_ATRI). Since the attribute information of this video title set has the same contents as the attribute information of the video title set described in the video title set information management table (VTS_MAT) described later with reference to FIG. 21 and FIG. Description is omitted.

  Next, the structure of the logical format of the video title set (VTS) 72 shown in FIG. 4 will be described with reference to FIG. In each video title set (VTS) 72, four items 94, 95, 96, and 97 are described in the description order as shown in FIG. Each video title set (VTS) 72 is composed of one or more video titles having a common attribute, and management information about the video title 72, for example, information for reproducing the video object set 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).

  A backup 97 of the video title set information (VTSI) 94 is provided in the video title set (VTS) 72. Between the video title set information (VTSI) 94 and a backup (VTSI_BUP) 97 of this information, there are a video object set (VTSM_VOBS) 95 for the video title set menu and a video object set (VTTSTT_VOBS) 96 for the video title set title. Is arranged. Any video object set (VTSM_VOBS and VTSTT_VOBS) 95, 96 has the structure shown in FIG.

  The video title set information (VTSI) 94, the backup of this information (VTSI_BUP) 97, and the video object set title video object set (VTSTT_VOBS) 96 are indispensable items for the video title set 72, and the video for the video title set menu is displayed. The object set (VTSM_VOBS) 95 is an option provided as necessary.

  As shown in FIG. 21, the video title set information (VTSI) 94 is composed of seven tables 98, 99, 100, 101, 111, 112, 113, and these seven tables 98, 99, 100, 101, 111, 112 and 113 coincide with the boundary between logical sectors. The first table, the video title set information management table (VTSI_MAT) 98, is an essential table, 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. The attributes of the video object set (VOBS) 82 in the title set (VTS) 72 are described.

  The second table, the video title set part of title search pointer table (VTS_PTT_SRPT), is an indispensable table and can be selected according to the number input by the user from the key operation / display unit 4 of the device. That is, a program chain (PGC) and / or a program (PG) included in the selectable video title set 72 is described. When the user designates an arbitrary number from among the input numbers described in the pamphlet along with the distribution of the optical disc 10 by the key operation / display unit 4, the user can view the video from the part in the story corresponding to the input number. The selectable title part can be arbitrarily determined by the title provider.

  The third table, the video title set program chain information table (VTS_PGCIT) 100, is an essential table and describes information related to the VTS program chain, that is, VTS program chain information (VTS_PGCI).

  A video title set menu PGCI unit table (VTSM_PGCI_UT) 111 which is a fourth table is an essential item when a video object set (VTSM_VOBS) 95 for a video title set menu is provided, and a video provided for each language. Information about a program chain for reproducing the title set menu (VTSM) is described. By referring to the video title set menu PGCI unit table (VTSM_PGCI_UT) 111, a program chain of a specified language in the video object set (VTSM_VOBS) 95 can be acquired and reproduced as a menu.

  A video title set time search map table (VTS_MAPT) 101, which is a fifth table, is an optional table provided as necessary, and is a title set 72 to which this map table (VTS_MAPT) 101 for a certain period of playback display belongs. Information about the recording position of the video data in each program chain (PGC) is described.

  The sixth table, the video title set cell address table (VTS_C_ADT) 112, is an indispensable item, and as described with reference to FIG. 6, the addresses or cells of the cells 84 constituting all the video objects 83 are stored. The addresses of the cell pieces to be configured are described in the order of the video object identification numbers. Here, the cell piece is a piece constituting the cell, and the cells are arranged in the video object 83 by performing an interleaving process based on the cell piece.

  A video title set video object unit address map (VTS_VOBU_ADMAP) 113 as a seventh table is an essential item, and all start addresses of the video object units 85 in the video title set are described in the arrangement order.

  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. 21 will be described with reference to FIGS.

  FIG. 22 shows the description content of the video title information manager table (VTSI_MAT) 98. In this table (VTSI_MAT) 98, the video title set identifier (VTS_ID), the size of the video title set 72 (VTS_SZ), the version number (VERN) of this DVD video standard, and the category (VTS_CAT) of the video title set 72 are listed in the order of description. And an end address (VTSI_MAT_EA) of the video title information manager table (VTSI_MAT) 98. Also, in this table (VTSI_MAT) 98, the start address (VTSM_VOBS_SA) of the video object set (VTSM_VOBS) 95 of the VTS menu (VTSM) and the start address (VTSTT_VOB_SA) of the video object for the title in the video title set (VTS) The start address of is described. When there is no video object set (VTSM_VOBS) 95 of the VTS menu (VTSM), “00000000h” is described in the start address (VTSM_VOBS_SA). The VTSI_MAT end address (VTSI_MAT_EA) is described in the relative number of bytes from the first byte of the video title set information management table (VTSI_MAT) 94, and the VTSM_VOBS start address (VTSM_VOBS_SA) and the VTSTT_VOB start address (VTSTT_VOB_SA) are It is described by the number of relative logical blocks (RLBN) from the top logical block of the title set (VTS) 72.

  Further, in this table (VTSI_MAT) 98, the start address (VTS_PTT_SRPT_SA) of the video title set part of title search pointer table (VTS_PTT_SRPT) 99 is described in the number of relative blocks from the first logical block of the video title set information (VTSI) 94. Has been. Also, in this table (VTSI_MAT) 98, the start address (VTS_PGCI_UT) of the video title set program chain information table (VTS_PGCIT) 100 and the PGCI unit table (VTS_PGCI_UT) 111 for the video title set menu are the video titles. The set information (VTSI) 94 is described in the relative number of blocks from the first logical block, and the start address (VTS_MAPT_SA) of the time search map table (VTS_MAPT) 101 of the video title set (VTS) is the video title set (VTS) 72. It is described in a relative logical sector from the first logical sector. Similarly, a VTS address table (VTS_C_ADT) 112 and an address map (VTS_VOBU_ADMAP) 113 of VTS_VOBU are described in a relative logical sector from the top logical sector of the video title set (VTS) 72.

  In this table (VTSI_MAT) 98, the video attribute (VTSM_V_ATR) of the video object set (VTSM_VOBS) 95 for the video title set menu (VTSM) in the video title set (VTS) 72, the number of audio streams (VTSM_AST_Ns), and the audio thereof The stream attribute (VTSM_AST_ATR), the number of sub-picture streams (VTSM_SPST_Ns), and the sub-picture stream attribute (VTSM_SPST_ATR) are described. Similarly, the table (VTSI_MAT) 98 includes a video attribute (VTS_V_ATR) of the video object set (VTST_VOBS) 96 for the title (VTSTT) of the video title set (VTS) in the video title set (VTS) 72, an audio stream. The number (VTS_AST_Ns), the audio stream attribute (VTS_AST_ATR), the number of sub-picture streams (VTS_SPST_Ns), and the sub-picture stream attribute (VTS_SPST_ATR) are described. Furthermore, the attribute (VTS_MU_AST_ATR) of the multi-channel audio stream of the video title set (VTS) is described in this table (VTSI_MAT) 98.

  Next, the video attribute, audio stream attribute, and sub-picture stream attribute described in FIG. 22 will be described in detail. The video attributes (VTS_V_ATR) for the video attribute set (VTSM_V_ATR) for the video object set (VTSM_VOBS) 95 for the VTSM and the video object set (VTSTT_VOBS) 96 for the video title set title (VTSTT) are already shown in FIGS. Also, attribute information similar to the video attribute (VMGM_V_ATR) of the video object for the video manager menu (VMGM_VOBS) described with reference to FIGS. 10A and 10B is described. That is, in the video attributes (VTSM_V_ATR) and (VTS_V_ATR), as shown in FIG. 8, from the bit number b8 to the bit number b15, the video object set 76 of the video manager menu (VMGM) is set as the video attributes, the compression mode, the frame rate, The display aspect ratio and the display mode are described, and bit number b0 to bit number b7 are reserved for future use as a reservation. When “00” is described in the bit numbers b15 and b14, it means that the menu video data is compressed in the video compression mode based on the MPEG-1 standard, and the bit numbers b15 and b14 indicate “ When 01 "is described, it means that the menu video data is compressed in the video compression mode based on the MPEG-2 standard, and other descriptions are reserved for future use. Yes. When “00” is described in the bit numbers b13 and b12, it means that the menu video data has a frame rate (29.27 / S) at which 29.27 frames are reproduced every second. That is, when “00” is described in the bit numbers b13 and b12, the menu video data is video data for a TV system adopting the NTSC system, and one frame is scanned at a horizontal scanning frequency of 60 Hz. This means that a frame rate drawn with 525 lines is adopted. In addition, when “01” is described in the bit numbers b13 and b12, it means that the menu video data has a frame rate (25 / S) at which 25 frames are reproduced per second. That is, it means that the video data for the TV system adopting the PAL system is adopted, and a frame rate is used in which one frame is drawn with a frequency of 50 Hz and 625 scanning lines. Other descriptions of bit numbers b13 and b15 are reserved for future use as reservations.

  Further, when “00” is described in the bit numbers b11 and b10, the menu video data means that the display aspect ratio (vertical / horizontal ratio) is 3/4. When “11” is described in b11 and b10, the menu video data means that the display aspect ratio (vertical / horizontal ratio) is 9/16, and other descriptions will be reserved as future reservations. It is vacated for.

  Further, when the display aspect ratio is 3/4, that is, when “00” is described in the bit numbers b11 and b10, “11” is described in the bit numbers b9 and b8. When the display aspect ratio is 9/16, that is, when “11” is described in the bit numbers b11 and b10, the video data for menu is allowed to be displayed in pan scan and / or letterbox. It is described whether or not. In other words, when “00” is described in the bit numbers b9 and b8, it means that display in both pan scan and letterbox is permitted, and “01” is permitted in the bit numbers b9 and b8. When it is described, it means that display in pan scan is permitted, but display in letterbox is prohibited. In addition, when “10” is described in the bit numbers b9 and b8, it means that display in pan scan is prohibited, but display in letterbox is permitted. When “11” is described in the bit numbers b9 and b8, it means that it is not particularly specified. Since the relationship between the video data recorded on the optical disk and the playback screen image on the TV monitor 6 is the same as that described with reference to FIGS. 9 and 10A and 10B, description thereof will be omitted.

  In addition, the audio stream attribute (VTTS_AST_ATR) of the video object set (VTST_VOBS) 96 for the audio stream attribute (VTSM_AST_ATR) and the video title set title (VTSTT) of the video object set (VTSM_VOBS) 95 for VTSM is already shown in FIG. 11 describes attribute information substantially similar to the audio stream attribute (VMGM_AST_ATR) of the video object for the video manager menu (VMGM_VOBS) described with reference to FIG. That is, in the audio stream attribute (VTSM_AST_ATR) of the VTS menu video object set (VTSM_VOBS) 95, as shown in FIG. 23, the audio coding mode, audio type, audio application ID, Quantization, sampling frequency, and number of audio channels are described, and bit number b47 to bit number b0 are reserved for future use. In the audio stream attribute (VTS_AST_ATR) of the video title set title (VTST), as shown in FIG. 23, the audio coding mode, the multi-channel extension, the audio type, the audio application ID, Quantization, sampling frequency, reservation, and the number of audio channels are described, a specific code is described in bit number b47 to bit number b40, bit number b39 to bit number b32, and bit number b31 to bit number b24. A reservation for a specific code is provided. Bit numbers b23 to b8 are reserved for future use, and application information is described in bit numbers b8 to b0. Here, when there is no VTS menu video object set (VTSM_VOBS) 95, or when there is no audio stream in the video object set, “0” is described in each bit from bit number b63 to bit number b0. .

  Audio coding modes are described in bit numbers b63, b62, and b61 in both of the attributes of the VTSM and VTST audio streams (VTSM_AST_ATR, VTS_AST_ATR). When “000” is described in the audio coding mode, it means that the audio data is coded in Dolby AC-3, and when “010” is described in the audio coding mode, the extension is performed. This means that audio data is compressed by MPEG-1 or MPEG-2 without a bitstream. Further, when “011” is described in the audio coding mode, it means that the audio data is compressed by MPEG-2 with the extension bit stream, and “100” is described in the audio coding mode. In this case, it means that audio data is coded by linear PCM. For audio data, other descriptions are reserved for future use. In the case of the video data attribute, when a frame rate for drawing one frame with a horizontal scanning frequency of 60 Hz and 525 scanning lines (“00” is described in bit numbers b13 and b12 in VTSM_V_ATR and VTS_V_ATR), Dolby AC− 3 (bit numbers b63, b62, b61 are “000”) or linear PCM (bit numbers b63, b62, b61 are “100”) should be set. Further, in the video data attribute, when a frame is drawn at a frequency of 50 Hz and the number of scanning lines is 625 (in the VTSM_V_ATR and VTS_V_ATR, “00” is described in bit numbers b13 and b12), MPEG-1. MPEG-2 (bit numbers b63, b62, and b61 are “010” or “011”) or linear PCM (bit numbers b63, b62, and b61 are “100”) should be set. In the audio coding mode of the VTST audio stream attribute (VTS_AST_ATR), the bit number b60 describes multi-channel extension. When this bit number b60 is “0”, the VTS related to the audio stream is described. Means that the multi-channel audio stream attribute (VTS_MU_AST_ATR) is invalid, and when the bit number b60 is “1”, the multi-channel audio stream attribute (VTS_MU_AST_ATR) related to the audio stream is linked. It means that.

  The audio type is described in bit numbers b59 and b58. If not specified, “00” is described. If the language is a human voice, “01” is described. Has been. The audio application field ID is described in bit numbers b57 and b56. If not specified, “00” is described. In the case of karaoke, “01” is described. In the case of surround, “10” is described, and the others are reserved. Further, regarding the quantization of audio data, it is described in bit numbers b55 and b54. When the bit numbers b55 and b54 are “00”, it means that the audio data is quantized with 16 bits. When b55 and b54 are “01”, it means that the audio data is quantized with 20 bits. When the bit numbers b55 and b54 are “10”, the audio data is quantized with 24 bits. This means that the bit number b55, b54 is “11” and is not specified. Here, when the audio coding mode is set to linear PCM (bit numbers b63, b62, b61 are "100"), quantization is not specified (bit numbers b55, b54 are "11"). Is done. The audio data sampling frequency fs is described in bit numbers b53 and b52. When the sampling frequency fs is 48 kHz, “00” is described, and when the sampling frequency fs is 96 kHz, “01”. Is described, and others are reserved.

  The number of audio channels is described in bit numbers b50 to b48, and when the bit numbers b50, b49, b48 are “000”, it means one channel (monaural), and the bit numbers b50, b49, When b48 is “0001”, it means that there are two channels (stereo). Also, when the bit numbers b50, b49, b48 are “010”, it means that there are 3 channels, and when the bit numbers b50, b49, b48 are “011”, there are 4 channels. When the bit numbers b50, b49, b48 are “100”, it means that there are 5 channels, and when the bit numbers b50, b49, b48 are “101”, there are 6 channels. If the bit number b50, b49, b48 is “110”, it means 7 channels, and if the bit number b50, b49, b48 is “111”, 8 It means that it is a channel. Here, three or more channels are multi-channel. The specific code is described in b47 to b40 and b39 to b32. In this case, when the type of the audio stream is language, that is, voice, the code of the language defined in ISO-639 is the language. It is described with a symbol. If the type of the audio stream is not language, i.e. voice, this area is reserved.

  The number of VTS audio streams (VTS_AST_Ns) is set between 0 and 8. Therefore, eight VTS audio stream attributes (VTS_AST_ATR) are prepared corresponding to the number of streams that can be set. That is, when there are VTS audio stream attribute (VTS_AST_Ns) areas from VTS audio stream # 0 to VTS audio stream # 7, and there are fewer than 8 VTS audio streams and there is no corresponding audio stream, there is no audio In the description of the VTS audio stream attribute (VTS_AST_Ns) shown in FIG. 22 corresponding to the stream, all bits are “0”.

  Furthermore, the sub-picture stream attribute (VTS_SPST_ATR) of the video object set (VTST_VOBS) 96 for the sub-picture stream attribute (VTSM_SPST_ATR) and the video title set title (VTSTT) of the video object set (VTSM_VOBS) 95 for VTSM includes: Attribute information similar to the sub-picture stream attribute (VMGM_SPST_ATR) of the video manager menu video object (VMGM_VOBS) already described with reference to FIG. 11 is described. That is, in the sub-picture stream attribute (VTSM_SPST_ATR) of the video object set (VTSM_VOBS) 95 for VTSM, as shown in FIG. 12, the sub-picture coding mode, sub-picture display type, The video type is described, and bit number b39 to bit number b0 are reserved. In the sub-picture stream attribute (VTS_SPST_ATR) of the video object set (VTST_VOBS) 96 for VTSTT, as shown in FIG. Is described, bit code b39 to bit number b32 and bit number b31 to bit number b24 are described as specific codes, bit number b23 to bit number b16 are reserved for specific codes, and bit numbers b15 to bit number b8 are A specific code extension is described. Furthermore, bit number b7 to bit number b0 are reserved.

  When “000” is described in the bit numbers b47, b46, and b45 as the description of the sub-picture coding mode, it is described that the sub-picture data is run-length compressed based on the 2-bit / pixel type standard. When “001” is described in the bit numbers b47, b46, and b45 as the description of the sub-picture coding mode, it is described that the sub-picture data is run-length compressed based on other standards. Others are reserved. The reservation may describe, for example, that it is a Row encoding method indicating that the sub-picture data is not compressed.

  The sub-picture display type is described in bit numbers b44, b43, and b42. When the display aspect ratio in VTSM_V_ATR or VMGM_V_ATR is 3/4 (bit numbers b11 and b10 are “00”), bit numbers b44 and b43 are used. , B42 describes “000”, and this attribute information means that it is not used. When the display aspect ratio in VTSM_V_ATR or VMGM_V_ATR is 9/16 (bit numbers b11 and b10 are “11”) and bit numbers b44, b43 and b42 are “001”, this sub-picture stream is wide. When the bit numbers b44, b43, and b42 are “010”, this means that the sub-picture stream only allows letterbox display, and the bit numbers b44, b43, and b42 are “ In the case of “011”, this sub-picture stream means that this sub-picture stream allows both wide display and letterbox display. When the bit numbers b44, b43, b42 are “100”, this sub-picture stream The video stream means that this sub-video stream only allows pan scan display, bit number b44, 43 and b42 being “110” means that this sub-picture stream allows both pan scan display and letterbox display. When bit numbers b44, b43 and b42 are “111”, this This means that the sub-picture stream permits all pan scan display, letter box display, and wide display. Further, the sub-picture type is described in the bit numbers b41 and b40, and is not specified when the bit numbers b41 and b40 are “00”, and when the bit numbers b41 and b40 are “01”. , Meaning that the language is a subtitle. Other descriptions of bit numbers b41 and b40 are reserved. An example of this reservation is a picture.

  A specific code is written in bit number b39 to bit number b32 and bit number b31 to bit number b24. Here, when the type of the sub-picture stream is language or subtitle, it is defined by ISO-639. The language code is written as a language symbol. When the sub-picture stream type is not language, this area is reserved. The extension of the specific code described in bit number b15 to bit number b8 describes the type of subtitle character. When “00h” is described in the bit number b15 to the bit number b8, it means that the character of the sub-picture stream is not a normal character or classification, and “01h” is set in the bit number b8 from the bit number b15. When described, it means that the character is a large character, and others are determined by system reservations or video providers.

  The number of sub-pictures (VTSM_SPST_Ns) in the VTS menu is basically one, but can be set to a number between 0 and 3. In this case, the sub-picture attributes (VTSM_SPST_ATR) of the VTS menu are described in the order of stream number # 0, stream number # 1, and stream number # 2 of sub-pictures each having a description as shown in FIG. When the number of sub-picture streams in the VTS menu (VTSM_SPST_Ns) is smaller than 3, all the bits are “0” in the sub-picture attribute (VTSM_SPST_ATR) of the VTS menu corresponding to the non-existing VTS menu sub-picture stream. Is described. The number of VTS sub-picture streams (VTS_SPST_Ns) can be set to a number between 0 and 32. In this case, the VTS sub-picture attributes (VTS_SPST_ATR) are described in the order of stream numbers # 0 to # 31 of sub-pictures each having a description as shown in FIG. When the number of VTS sub-picture streams (VTS_SPST_Ns) is smaller than 32, “0” is described in all bits in the VTS sub-picture attribute (VTSM_SPST_ATR) corresponding to the non-existent VTS sub-picture stream. The

  In the attribute (VTS_MU_AST_ATR) of the multi-channel audio stream of the video title set (VTS), attribute information from the multi-channel audio stream # 0 to the multi-channel audio stream # 7 is described. Each multi-channel audio stream attribute (VTS_MU_AST_ATR) describes the contents of the audio channel (karaoke, surround, etc.), the audio mixing method, and the like.

  The VTS program chain information table (VTS_PGCIT) 100 shown in FIG. 21 has a structure as shown in FIG. In this information table (VTS_PGCIT) 100, information (VTS_PGCI) related to the VTS program chain (VTS_PGC) is described, and an information table (VTS_PGCIT_I) 102 related to the VTS program chain (VTS_PGCIT) 100 is provided as the first item. It has been. Subsequent to this information (VTS_PGCIT_I) 102, this information table (VTS_PGCIT) 100 includes VTS program chains (VTS_PGC) corresponding to the number (# 1 to #n) of VTS program chains (VTS_PGC) in the information table (VTS_PGCIT) 100. VTS_PGCI search pointer (VTS_PGCIT_SRP) 103 is provided, and finally, information (VTS_PGCI) 104 relating to each VTS program chain (VTS_PGC) is provided by the number (# 1 to #n) corresponding to the VTS program chain (VTS_PGC). ing.

  In the information (VTS_PGCIT_I) 102 of the VTS program chain information table (VTS_PGCIT) 100, the number (VTS_PGC_Ns) of the VTS program chains (VTS_PGC) is described as the contents and the table information (VTS_PGCIT_I) 102 as shown in FIG. The end address (VTS_PGCIT_EA) is described by the relative number of bytes from the first byte of the information table (VTS_PGCIT) 100.

  Further, the VTS_PGCIT search pointer (VTS_PGCIT_SRP) 103 includes an attribute (VTS_PGC_CAT) of the program chain (VTS_PGC) of the video title set (VTS) 72 and the first byte of the VTS_PGC information table (VTS_PGCIT) 100 as shown in FIG. The start address (VTS_PGCI_SA) of the VTS_PGC information (VTS_PGCI) is described as a relative number of bytes. Here, the VTS_PGC attribute (VTS_PGC_CAT) describes, for example, whether or not the entry program chain (entry PGC) is reproduced first. Normally, the entry program chain (PGC) is described prior to the program chain (PGC) that is not the entry program chain (PGC).

  In the PGC information (VTS_PGCI) 104 in the video title set, four items are described as shown in FIG. In the PGC information (VTS_PGCI) 104, first, program chain general information (PGC_GI) 105 of essential items is described, and at least three items 106 and 107 that are mandatory only when there is a video object following this. , 108 are described. That is, as the three items, a program chain program map (PGC_PGMAP) 106, a cell playback information table (C_PBIT) 107, and a cell location information table (C_POSIT) 108 are described in the PGC information (VTS_PGCI) 104.

  The program chain general information (PGC_GI) 105 includes a program chain (PGC) category (PGCI_CAT), a program chain (PGC) content (PGC_CNT), and a program chain (PGC) playback time (PGC_PB_TIME) as shown in FIG. Is described. The PGC category (PGCI_CAT) describes whether or not copying of the PGC is possible and whether or not the program in the PGC is continuous or random. The contents of the PGC (PGC_CNT) describe the contents of the program chain, that is, the number of programs, the number of cells, and the like. The PGC playback time (PGC_PB_TIME) describes the total playback 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 back continuously regardless of the playback procedure.

  The program chain general information (PGC_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-pictures that can be used in PGC, and PGC audio stream control (PGC_AST_CTL) 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 for all sub-picture streams of this PGC.

  Further, the PGC general information (PGC_GI) 105 includes a start address (PGC_PGMAP_SA_SA) of the PGC program map (PGC_PGMAP_SA), a start address (C_PBIT_SA) of the cell playback information table (C_PBIT) 107, and a start of the cell location information table (C_POSIT) 108. An address (C_POSIT_SA) is described. Any start address (C_PBIT_SA and C_POSIT_SA) is described in the relative number of bytes from the first byte of the VTS_PGC information (VTS_PGCI).

  The program chain program map (PGC_PGMAP) 106 is a map showing the configuration of programs in the PGC as shown in FIG. In this map (PGC_PGMAP) 106, as shown in FIG. 29 and FIG. 30, entry cell numbers (ECELLN) which are program start cell numbers are described in ascending order of cell numbers. Also, program numbers are assigned from 1 in the order of entry cell number description. Therefore, the first entry cell number of this map (PGC_PGMAP) 106 must be # 1.

  The cell playback information table (C_PBIT) 107 defines the playback order of PGC cells. In this cell playback information table (C_PBIT) 107, cell playback information (C_PBIT) is described continuously as shown in FIG. Basically, the cells are reproduced in the order of the cell numbers. In the cell playback information (C_PBIT), as shown in FIG. 32, the cell category (C_CAT) is described as the playback information (P_PBI). This cell category (C_CAT) includes a cell block mode indicating whether the cell is a cell in a cell block, or the first cell if the cell is in a cell block. The cell block type indicating whether there is no angle block or the STC discontinuity flag indicating whether it is necessary to reset the system time clock (STC) is described. Here, the cell block is defined as a set of cells having a specific angle. The change of the angle is realized by changing the cell block. In other words, taking baseball as an example, a change in the angle block in which the scene from the infield is photographed from the angle block in which the scene from the outfield is photographed corresponds to a change in angle.

  In this cell category (C_CAT), a cell playback mode indicating whether playback is continued in the cell or in units of each video object unit (VOBU) in the cell, whether to stop after playback of the cell. Cell navigation control indicating whether or not the stationary time is described.

  Also, as shown in FIG. 32, the reproduction information (P_PBI) in the cell reproduction information table (C_PBIT) 107 includes a cell reproduction time (C_PBTM) describing the total reproduction time of the PGC. When the angle cell block is in the PGC, the playback time of the angle cell number 1 represents the playback time of the angle block. Further, in the cell playback information table (C_PBIT) 107, the head video object unit (VOBU) in the cell is indicated 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 address (C_FVOBU_SA) is described, and the last video object unit (VOBU) in the cell with 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_LVOBU_SA) are described.

  The cell location information table (C_POSI) 108 specifies the identification number (VOB_ID) of the video object (VOB) of the cell used in the PGC and the identification number (C_ID) of the cell. In the cell location information table (C_POSI), as shown in FIG. 33, the cell location information (C_POSI) corresponding to the cell number described in the cell playback information table (C_PBIT) 107 is the same as the cell playback information table (C_PBIT). Listed in order. In this cell position information (C_POSI), as shown in FIG. 34, the identification number (C_VOB_IDN) and the cell identification number (C_IDN) of the video object unit (VOBU) 85 of the cell are described.

  As described with reference to FIG. 6, the cell 84 is a set of video object units (VOBU) 85, and the video object unit (VOBU) 85 is defined as a pack row starting from a navigation (NV) pack 86. Therefore, the start address (C_FVOBU_SA) of the first video object unit (VOBU) 85 in the cell 84 represents the start address of the NV pack 86. As shown in FIG. 35, the NV pack 86 has a structure comprising 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 117. The number of bytes as shown in FIG. 35 is assigned to each part, and one pack is set to 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 pictures (GOP). Even when the object unit 85 does not include the video pack, the NV pack is arranged at the head of the object unit including the audio pack and / or the sub-picture pack. As described above, even when the object unit does not include the video pack, the playback time of the object unit is determined based on the unit in which the video is played, as in the case where the object unit includes the video pack.

  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, the GOP corresponds to compressed data, and when the compressed data is expanded, a plurality of frames of image data that can reproduce a moving image are reproduced. The pack header 110 and the system header 111 are defined by the MPEG2 system layer. The pack header 110 stores pack start code, system clock reference (SCR), and multiplexing rate information. The rate and stream ID are described. In the packet headers 112 and 114 of the PCI packet 116 and the DSI packet 117, a packet start code, a packet length, and a stream ID are stored as defined in the MPEG2 system layer.

  The other video, audio, and sub-picture packs 88, 90, and 91 are similar to those defined in the MPEG2 system layer, as shown in FIG. 36, from the pack header 120, the packet header 121, and the packet 122 storing the corresponding data. The pack length is defined as 2048 bytes. Each of these packs is aligned with a logical block boundary.

  PCI data (PCI) 113 of the PCI packet 116 is navigation data for changing the content of presentation, that is, display in synchronization with the playback state of video data in the VOB unit (VOBU) 85. That is, as shown in FIG. 37, PCI data (PCI) 113 describes PCI general information (PCI_GI) as information of the entire PCI and angle information (NSMLS_ANGLI) as each jump destination angle information when changing the angle. ing. In the PCI general information (PCI_GI), as shown in FIG. 38, the address (NV_PCK) 86 of the NV pack (NV_PCK) 86 in which the PCI 113 is recorded with the number of relative logical blocks from the logical sector of the VOBU 85 in which the PCI 113 is recorded. NV_PCK_LBN) is described. Also, the PCI general information (PCI_GI) describes a category of VOBU 85 (VOBU_CAT), a start reproduction time (VOBU_S_PTM) and a reproduction end time (VOBU_EPTM) of VOBU 85. Here, the start PTS (VOBU_SPTS) of the VOBU 85 indicates the playback start time (start presentation time) of the video data in the VOBU 85 in which the PCI 113 is included. This playback start time is the first playback start time in VOBU85. Usually, the first picture corresponds to the reproduction start time of an I picture (Intra-Picture) in the MPEG standard. The end PTS (VOBU_EPTS) of the VOBU 85 indicates the playback end time (end presentation time) of the VOBU 85 including the PCI 113.

  The DSI data (DSI) 115 of the DSI packet 117 shown in FIG. 35 is navigation data for executing a search for the VOB unit (VOBU) 85. As shown in FIG. 39, the DSI data (DSI) 115 includes DSI general information (DSI_GI), seamless playback information (SML_PBI), angle information (SML_AGLI), navigation pack address information (NV_PCK_ADI), and synchronous playback information (SYNCI). Is described.

  The DSI general information (DSI_GI) describes the entire information of the DSI data 115. That is, as shown in FIG. 40, the system time base reference value (NV_PCK_SCR) of the NV pack 86 is described in the DSI general information (DSI_GI). This system time base reference value (NV_PCK_SCR) is stored in a system time clock (STC) incorporated in each unit shown in FIG. 1, and video, audio and sub-picture packs are video, audio and sub-picture based on this STC. Decoding is performed by the decoder units 58, 60 and 62, and video and audio are reproduced by the monitor unit 6 and the speaker unit 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 number of logical sectors (RLSN) from the head logical sector of the VOB set (VOBS) 82 in which the DSI 115 is recorded. The address (VOBU_EA) of the last pack in the VOB unit (VOBU) 85 where the address (NV_PCK_LBN) is described and the DSI 115 is recorded with the relative logical sector number (RLSN) from the head logical sector of the VOB unit (VOBU) is Are listed.

  Furthermore, in the DSI general information (DSI_GI), the last address of the first I picture in this VOBU is the relative logical sector number (RLSN) from the head logical sector of the VOB unit (VOBU) in which the DSI 115 is recorded. The end address (VOBU_IP_EA) of the recorded V pack (V_PCK) 88 is described, the identification number (VOBU_IP_IDN) of the VOBU 83 in which the DSI 115 is recorded, and the identification number (VOBU_C_IDN) of the cell in which the DSI 115 is recorded. Are listed.

  In the DSI navigation pack address information, addresses of a predetermined number of navigation packs are described. The video is fast-forwarded by referring to this address. In addition, the synchronization information (SYNCI) describes address information of sub-picture and audio data to be reproduced in synchronization with the reproduction start time of video data of the VOB unit (VOBU) including the DSI 115. That is, as shown in FIG. 41, the start address (A_SYNCA) of the target audio pack (A_PCK) 91 is described by the relative number of logical sectors (RLSN) from the NV pack (NV_PCK) 86 in which the DSI 115 is recorded. The When there are a plurality of audio streams (maximum 8), the same number of synchronization information (SYNCI) is described. Further, in the synchronization information (SYNCI), 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 is the NV pack (NV_PCK) in which the DSI 115 is recorded. ) 86 relative logical sector numbers (RLSN). When there are a plurality of sub-picture streams (maximum 32), the same number of synchronization information (SYNCI) is described.

  Next, the video data attributes (VMG_V_ATR, VTSM_V_ATR, VTS_V_ATR), the audio data attributes (VMG_AST_ATR, VTSM_AST_ATR, VTS_AST_ATR), the sub-picture data attributes (VMG_SPST_ATR, VTSM_SPST_ATR, ATS_SP, 58) Next, a circuit configuration in which the sub-picture decoder unit 62 and the D / A & reproduction processing unit 64 can be set appropriately will be described.

  As shown in FIG. 42, the video decoder unit 58 includes a register 58A, a selector 58B, an MPEG1 decoder 58C, and an MPEG2 decoder 58D. In the circuit shown in FIG. 42, a control signal corresponding to video data attributes (VMGM_V_ATR, VTSM_V_ATR, VTS_V_ATR) supplied from the system CPU unit 50 via the system processor unit 54 is held in the register 58A, and its output is the selector 58B. Is output. The selector 58B selectively outputs the video data supplied from the system processor unit 54 to the MPEG1 decoder 58C or the MPEG2 decoder 58D in accordance with the output from the register 58A. When the MPEG1 decoder 58C is selected, the video data from the selector 58B is supplied to the MPEG1 decoder 58C, and the video data is decoded by the MPEG1 encoding method. When the MPEG2 decoder 58D is selected, the video data from the selector 58B is supplied to the MPEG2 decoder 58D, and the video data is decoded by the MPEG2 decoder 58D using the MPEG2 encoding method. The decoder output from the MPEG1 decoder 58C or the MPEG2 decoder 58D is output as a decoder output of the video decoder unit 58 to a video playback processing unit 201 described later in the D / A & playback processing unit 64.

  As shown in FIG. 43, the audio decoder unit 60 includes a register 60A, a selector 60B, an MPEG1 decoder 60C, an AC3 decoder 60D, and a PCM decoder 60E. In the circuit shown in FIG. 43, a control signal corresponding to audio data attributes (VMGM_AST_ATR, VTSM_AST_ATR, VTS_AST_ATR) supplied from the system CPU unit 50 via the system processor unit 54 is held by the register 60A, and the output thereof is the selector 60B. Is output. The selector 60B selectively outputs the audio data supplied from the system processor unit 54 to the MPEG1 decoder 60C, the AC3 decoder 60D, or the PCM decoder 60E according to the output from the register 60A. When the MPEG1 decoder 60C is selected, the audio data from the selector 60B is decoded by the MPEG1 decoder 60C using the MPEG1 encoding method. When the AC3 decoder 60D is selected, the audio data from the selector 60B is decoded by the AC3 decoder 60D using the AC3 encoding method. When the PCM decoder 60E is selected, digital audio data from the selector 60B is decoded into analog audio data by the PCM decoder 60E. The decoder output from the MPEG1 decoder 60C, the AC3 decoder 60D, or the PCM decoder 60E is output as a decoder output of the audio decoder unit 60 to an audio reproduction processing unit 202 (to be described later) in the D / A & reproduction processing unit 64.

  As shown in FIG. 44, the sub-picture decoder unit 62 includes a register 62A, a selector 62B, a bitmap decoder 62C, and a run-length decoder 62D. In the circuit shown in FIG. 44, the control signal corresponding to the sub-picture data attributes (VMGM_SPST_ATR, VTSM_SPST_ATR, VTS_SPST_ATR) supplied from the system CPU unit 50 via the system processor unit 54 is held by the register 62A, and its output is a selector. Is output to 62B. The selector 62B selectively outputs the sub-picture data supplied from the system processor unit 54 to the bitmap decoder 62C or the run-length decoder 62D according to the output from the register 62A. When the bitmap decoder 62C is selected, the sub-picture data from the selector 62B is decoded by the bitmap decoder 62C in accordance with the bitmap encoding method, and when the run-length decoder 62D is selected, from the selector 62B. The sub-picture data is decoded by the run-length decoder 62D by the run-length encoding method.

  As shown in FIG. 1, the D / A & playback processing unit 64 includes a video playback processing unit 201, an audio playback processing unit 202, an audio mixing unit 203, and a sub-video playback processing unit 207. As shown in FIG. 45, the video reproduction processing unit 201 converts a color difference signal of NTSC video data into a color difference signal of PAL video data, a letterbox converter 204 having an internal memory, or a PAL video signal. It comprises a digital / NTSC / PAL converter 205 having a video formatter function for converting a color difference signal of video data into a color difference signal of NTSC video data, and a D / A converter 206 for converting the digital video signal into an analog video signal. ing. The letterbox converter 204 responds to a control signal corresponding to a display mode (bit numbers b9, b8) of video data attributes (VMGM_SPST_ATR, VTSM_SPST_ATR, VTS_SPST_ATR) supplied from the system CPU 50 via the system processor 54. The video data supplied from the video decoder unit 58 is converted into letterbox or output without being converted into letterbox. In this letterbox conversion process, when the conversion is permitted (display mode bit numbers b9 and b8 are “00” or “10”), as described with reference to FIG. 9, the aspect ratio is 9/16. Video data is converted so that all data can be displayed on the monitor unit 6 having an aspect ratio of 3/4. When displaying on the monitor unit 6, an upper limit black portion of the image is formed, which is called a letter box. The digital / NTSC / PAL converter 205 is a control signal corresponding to the frame rate (bit numbers b13, b12) of the video data attributes (VMGM_SPST_ATR, VTSM_SPST_ATR, VTS_SPST_ATR) supplied from the system CPU 50 via the system processor 54. Accordingly, the video data from the letterbox converter 204 is converted into the NTSC format and converted into the PAL format. The output from the digital / NTSC / PAL converter 205 is converted to analog data by the D / A converter 206 and then output to the monitor unit 6.

  As shown in FIG. 46, the audio reproduction processing unit 202 includes a register 202A, a selector 202B, a stereo output unit 202C, a monaural output unit 202D, and a surround output unit 202E. In the circuit shown in FIG. 46, the control signal corresponding to the audio data attributes (VMGM_SPST_ATR, VTSM_SPST_ATR, VTS_SPST_ATR) supplied from the system CPU unit 50 via the system processor unit 54 is held in the register 202A, and the output thereof is the selector 202B. Is output. The selector 202B selectively outputs the audio data supplied from the audio decoder unit 60 to the stereo output unit 202C, monaural output unit 202D, or surround output unit 202E according to the output from the register 202A. When the stereo output unit 202C is selected, the audio data from the selector 202B is converted into stereo data. When the monaural output unit 202D is selected, the audio data from the selector 202B is converted into monaural data. When the surround output unit 202E is selected, the audio data from the selector 202B is converted into surround data. The output from the stereo output unit 202C, monaural output unit 202D, or surround output unit 202E, that is, the output of the audio reproduction processing unit 202 is output directly to the speaker unit 8 or to the speaker unit via the audio mixing unit 203. The

  When the audio data is multi-channel audio data, the output of the reproduction processing unit 202 is output from the speaker unit via the audio mixing unit 203. As shown in FIG. 47, the audio mixing unit 203 includes a register 203A, a register 203B, a selector 203C, a first stream processing unit 203D, a second stream processing unit 203E, and a mixing processing unit 203F. In the circuit shown in FIG. 47, the registers 203A and 203B hold control signals corresponding to the multi-channel audio stream attribute (VTS_MU_AST_ATR) described in VTSI_MAT supplied from the system CPU unit 50 via the system processor unit 54. Then, the output of the register 203A is output to the selector 203C, and the output of the register 203B is output to the mixing processing unit 203F. The selector 203C selectively outputs the audio data supplied from the audio reproduction processing unit 202 to the first stream processing unit 203D or the second stream processing unit 203E according to the output from the register 203A. When the first stream processing unit 203D is selected, the audio data from the selector 203C is converted into data of the first stream by the first stream processing unit 203D. When the second stream processing unit 203E is selected, the audio data from the selector 203C is converted into data of the second stream by the second stream processing unit 203E. The output from the first stream processing unit 203D or the second stream processing unit 203E is output to the mixing processing unit 203F. The mixing processing unit 203F executes mixing processing in accordance with the output from the register 203A, and the mixed data is output as an output from the audio mixing unit 203 to the speaker 8 or the like.

  Next, with reference to FIG. 1 again, a description will be given of the operation of reproducing movie data from the optical disk 10 having the logical format shown in FIGS. In FIG. 1, a solid line arrow between blocks indicates a data bus, and a broken line arrow indicates a control bus.

  In the optical disk apparatus shown in FIG. 1, when the power is turned on and the optical disk 10 is loaded, the system CPU section 50 reads the initial operation program from the system ROM and RAM section 52 and operates the disk drive section 30. . Therefore, the disk drive unit 30 starts the read operation from the lead-in area 27, and the volume and file structure area 70 that define the volume and file structure in accordance with ISO-9660 and the like following the lead-in area 27 are read. . That is, the system CPU unit 50 gives a read command to the disk drive unit 30 in order to read the volume and file structure area 70 recorded at a predetermined position of the disk 10 set in the disk drive unit 30, and the volume and file The contents of the structure area 70 are read out and temporarily stored in the data RAM unit 56 via the system processor unit 54. The system CPU unit 50 extracts information such as the recording position and recording capacity size of each file and other management information as information necessary for management via the path table and directory record stored in the data RAM unit 56, and is used for the system. The data is transferred to a predetermined location in the ROM & RAM unit 52 and stored.

  Next, the system CPU unit 50 refers to the recording position and recording capacity information of each file from the system ROM & RAM unit 52 and acquires a video manager 71 composed of a plurality of files starting from file number 0. That is, the system CPU unit 50 gives a read command to the disk drive unit 30 by referring to the recording position and recording capacity information of each file acquired from the system ROM and RAM unit 52 and exists on the root directory. The position and size of a plurality of files constituting the video manager 71 are acquired, the video manager 71 is read out, and stored in the data RAM unit 56 via the system processor unit 54.

  A video manager information management table (VMGI_MAT) 78 which is the first table of the video manager 71 is searched. By this search, the start address (VMGM_VOBS_SA) of the video object set (VMGM_VOBS) 76 for the video manager menu (VMGM) is acquired, and the video object set (VMGM_VOBS) 76 is reproduced. The playback of the menu video object set (VMGM_VOBS) 76 is the same as the video object set (VTSM_VOBS) for the title in the video title set (VTS), and therefore the playback procedure is omitted. When the language is set in this video object set (VMGM_VOBS) 76, or when there is no video manager menu (VMGM), the video manager information management table (VMGI_MAT) is searched and the title set search pointer table (TT_SRPT) 79 The start address of (TT_SRPT_SA) is searched. Here, when the video manager menu is played back, the system CPU unit 50 determines the number of video, audio, and sub-picture streams for the volume menu described in the information management table (VMGI_MAT) 78 of the video manager (VMGI) 75. Also, parameters for video manager menu playback are set in each video decoder unit 58, audio decoder unit 60, and sub-picture decoder unit 62 based on the attribute information obtained from the respective attribute information.

  By 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 at the same time the title search pointer corresponding to the input number from the key operation / display unit 4 From (TT_SRP) 93, the video title set number (VTSN), the program chain number (PGCN) and the start address (VTS_SA) of the video title set corresponding to the input number are obtained. When there is only one title set, one title search pointer (TT_SRP) 93 is searched regardless of the input number from the key operation / display unit 4 and the start address (VTS_SA) of the title set is acquired. Is done. The system CPU unit 50 acquires the target title set from the start address (VTS_SA) of the title set.

  Next, as shown in FIG. 21, video title set information (VTSI) 94 of the title set is acquired from the start address (VTS_SA) of the video title set 72 shown in FIG. The end address (VTI_MAT_EA) of the video title set information management table (VTSI_MAT) 98 shown in FIG. 22 is acquired from the video title set information management table (VTSI_MAT) 98 of the video title set information (VTSI) 94. 1 is set according to the attributes based on the number of audio and sub-picture data streams (VTS_AST_Ns, VTS_SPST_Ns) and video, audio and sub-picture data attribute information (VTS_V_ATR, VTS_A_ATR, VTS_SPST_ATR). Is done. The setting of each part of the playback device according to this attribute information will be described later in more detail.

  When the menu (VTSM) for the video title set (VTS) has a simple configuration, the video object set for the menu of the video title set is obtained from the video title set information management table (VTSI_MAT) 98 shown in FIG. The start address (VTSM_VOB_SA) of (VTSM_VOB) 95 is acquired, and the video title set menu is displayed by the video object set (VTSM_VOB) 95. When the video object set (VTT_VOBS) 96 for the title (VTST) in the title set (VTS) is simply reproduced without referring to the program chain (PGC) with reference to this menu, it is shown in FIG. The video object set 96 is reproduced from the start address (VTSTT_VOB_SA).

  When a program chain (PGC) is designated by the key operation / display unit 4, the target program chain is searched in the following procedure. This program chain search is not limited to the program chain for the titles in the video title set, and the same procedure is applied to the search for the program chain for the menu even in a relatively complicated menu whose menu is composed of program chains. Is adopted. The start address of the program chain information table (VTS_PGCIT) 100 in the video title set (VTS) shown in FIG. 22 described in the management table (VTSI_MAT) 98 of the video title set information (VTSI) 94 is acquired and shown in FIG. Information (VTS_PGCIT_I) 102 in the VTS program chain information table is read. From this information (VTS_PGCIT_I) 102, the number of program chains (VTS_PGC_Ns) and the end address (VTS_PGCIT_EA) of the table 100 shown in FIG. 25 are obtained.

  When the number of the program chain is specified by the key operation / display unit 4, the category of the program chain shown in FIG. 26 and the search pointer (VTS_PGCIT_SRP) shown in FIG. 26 from the VTS_PGCIT search pointer (VTS_PGCIT_SRP) 103 shown in FIG. ) The start address of the VTS_PGC information 104 corresponding to 103 is acquired. The program chain general information (PGC_GI) shown in FIG. 27 is read by this start address (VTS_PGCI_SA). With this general information (PGC_GI), the program chain (PGC) category, playback time (PGC_CAT, PGC_PB_TIME), etc. are acquired, and the cell playback information table (C_PBIT) and cell location information table (C_POSIT) described in the general information (PGC_GI) are acquired. ) 108 start addresses (C_PBIT_SA, C_POSIT_SA) are acquired. The video object identifier (C_VOB_IDN) and the cell identification number (C_IDN) as shown in FIG. 34 are obtained from the start address (C_PBIT_SA) as the cell position information (C_POSI) shown in FIG.

  Further, the cell playback information (C_PBI) shown in FIG. 31 is obtained from the start address (C_POSIT_SA), and the start address (C_FVOBU_SA) of the first VOBU 85 in the cell shown in FIG. 32 described in the playback information (C_PBI) and the final The start address (C_LVOBU_SA) of VOBU is acquired and the target cell is searched. With respect to the cell playback order, the playback cells 84 are successively determined with reference to the program map shown in FIG. 29 of the PGC program map (PGC_PGMAP) 106 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 data cell 84 is supplied to the video decoder unit 58, the audio decoder unit 60, and the sub-picture decoder unit 62 based on the reproduction time information, and is decoded. The image is reproduced and the sound is reproduced from the speaker units 8 and 9.

  Next, acquisition of video data attribute information (VTS_V_ATR) and setting processing of the video decoder and video playback processing unit 201 according to the attribute information (VTS_V_ATR) in this optical disc playback apparatus will be described with reference to the flowchart shown in FIG. To do. When the setting process is started, the system CPU unit 50 controls the disc drive unit 30 to read the video title set information management table (VTSI_MAT) 98 from the optical disc 10 and temporarily stores it in the data RAM unit 56. As shown in step S0, the system CPU unit 50 acquires the video data attribute (VTS_V_ATR) recorded in the video title set information management table (VTSI_MAT) 98 stored in the data RAM unit 56. Whether the acquired video data attribute (VTS_V_ATR) is newly acquired or a new video data attribute (VTS_V_ATR) different from the already acquired video data attribute (VTS_V_ATR) is confirmed in step S1. If the video data attribute (VTS_V_ATR) is not acquired, the process returns to step S0 again. If the new video data attribute (VTS_V_ATR) is the same as the already acquired video data attribute (VTS_V_ATR), the process is as follows. Is terminated. When a new video data attribute (VTS_V_ATR) is acquired, the system CPU 50 determines whether the video compression mode described in the acquired video data attribute (VTS_V_ATR) is MPEG1 or MPEG2 as shown in step S2. It is determined whether it is compliant, and a control signal corresponding to the determination result is output to the register 58A of the video decoder unit 58 shown in FIG. Thereby, the selector 58B is switched according to the control signal supplied to the register 58A. That is, when the video compression mode 131 conforms to MPEG1 as shown in step S3, the video data from the system processor unit 54 is supplied to the MPEG1 decoder 58C via the selector 58B and decoded in the MPEG1 mode. If the video compression mode 131 conforms to MPEG2 as shown in step S4, the video data from the system processor unit 54 is supplied to the MPEG2 decoder 58D via the selector 58B and decoded in the MPEG2 mode.

  Further, the system CPU 50 determines that the frame rate described in the frame rate (bit numbers b13 and b12) of the acquired video data attribute (VTS_V_ATR) as shown in step S5 is the NTSC system (frame rate 29.97 / s). Or a PAL system (frame rate 25 / s), and a control signal corresponding to the determination result is sent to the D / A & playback processing unit 64 in the video playback processing unit 201. Output to the digital / NTSC / PAL converter 205. When conforming to the NTSC system (frame rate 29.97 / s), that is, when the bit numbers b13 and b12 describing the frame rate are “00”, the video data is stored as shown in step S6. The digital signal is converted into an NTSC video signal by a digital / NTSC / PAL converter 205. If the PAL system (frame rate 25 / s) is compliant, that is, if the bit numbers b13 and b12 describing the frame rate are “01”, the video data is stored as shown in step S7. The digital-NTSC / PAL converter 205 converts the signal into a PAL video signal.

  Further, the system CPU 50 determines whether the display aspect ratio described in the acquired video data attribute (VTS_V_ATR) is 3/4 or 9/16 as shown in step S8. When the determination result is 3/4, that is, when the bit numbers b11 and b10 describing the display aspect ratio are “00”, the system CPU unit 50 prohibits the conversion to letterbox. The control signal is output to the letterbox converter 204 of the video reproduction processing unit 201 in the D / A & reproduction processing unit 64 via the system processor unit 54. As a result, the letterbox conversion processing by the letterbox converter 204 is prohibited as shown in step S9. Further, the system CPU 50 outputs a control signal indicating prohibition of pan scan processing to the MPEG2 decoder 58d in the video decoder 58 via the system processor 54 as shown in step S10. As a result, pan scan processing by the MPEG2 decoder 58d is prohibited.

  If the determination result in step 8 is 9/16, that is, if the bit numbers b11 and b10 describing the display aspect ratio are “11”, the system CPU unit 50 performs the processing as shown in step S11. It is determined whether the display aspect ratio specified by the user is 9/16. When the determination result is 9/16, the process proceeds to step 9 already described. When the display aspect ratio specified by the user is 3/4, the system CPU unit 50 uses the pan scan method for display conversion specified by the user in the key operation unit and the display unit 4 as shown in step S12. Is determined. If the determination result is not pan-scan display conversion, the system CPU unit 50 sends a control signal indicating letterbox conversion processing to the video in the D / A & reproduction processing unit 64 via the system processor unit 54 as shown in step 13. The data is output to the letterbox converter 204 in the reproduction processing unit 201. Thereby, letterbox conversion processing by the letterbox converter 204 is set. Further, the system CPU unit 50 outputs a control signal indicating prohibition of pan scan processing to the MPEG2 decoder 58d in the video decoder unit 58 via the system processor unit 54 as shown in step S14. As a result, pan scan processing by the MPEG2 decoder 58d is prohibited.

  If the determination result in step 12 is pan-scan display conversion, the system CPU 50 permits the pan scan 134 described in the acquired video data attribute (VTS_V_ATR) as shown in step S15. Whether or not is prohibited. If the determination result is permission, the system CPU unit 50 sends a control signal indicating prohibition of letterbox conversion processing to the letterbox of the video playback processing unit 201 in the D / A & playback processing unit 64 via the system processor unit 54. Output to the converter 204. As a result, the letterbox conversion process by the letterbox converter 204 is prohibited as shown in step S16. Further, the system CPU unit 50 outputs a control signal indicating permission of pan scan processing to the MPEG2 decoder 58d in the video decoder unit 58 via the system processor unit 54 as shown in step S17. Thereby, pan scan processing by the MPEG2 decoder 58d is set.

  If the determination result in step 15 is prohibited, the system CPU unit 50 displays the fact that pan scanning is prohibited on the key operation unit and the display unit 4 as shown in step S18, or Displayed by an indicator to notify the user. Further, the system CPU unit 50 proceeds to step 9 after performing the display or notification.

  48, when the video decoder 58 and the video playback processing unit 201 are set according to the video data attribute information (VMGM_V_ATR), a video management information management table (VTSI_MAT) 98 is used instead of the video title set information management table (VTSI_MAT) 98. VMGI_MAT) 78 is read to obtain video data attribute information (VMG_V_ATR). 48, when the video decoder 58 and the video playback processing unit 201 are set according to the video data attribute information (VTSM_V_ATR), the video title set information management table (VTS_V_ATR) is the same as the video data attribute information (VTS_V_ATR). Video data attribute information (VTSM_V_ATR) is obtained from (VTSI_MAT) 98.

  Next, audio data attribute (VTS_AST_AT) acquisition and setting processing of the video decoder and video playback processing unit 201 according to the attribute information (VTS_AST_AT) in this optical disc playback apparatus will be described with reference to the flowchart shown in FIG. . When the setting process is started, as shown in step 20, the system CPU unit 50 controls the disk drive unit 30 to read the video title set information management table (VTSI_MAT) 98 from the optical disk 10 and temporarily stores the data RAM unit 56. To store. As shown in step 21, the system CPU unit 50 acquires the number of audio streams recorded in the video title set information management table (VTSI_MAT) 98 stored in the data RAM unit 56. When an audio stream number that can be selected by the user is designated by the key operation and the operation of the processing unit 4 as shown in step 32, the video title set information management table (VTSI_MAT) stored in the data RAM unit 56 as shown in step 22 The system CPU unit 50 acquires the audio attribute (VTS_AST_AT) corresponding to the stream number designated by the user from the 98 audio data attribute groups (VTS_AST_AT). The system CPU 50 determines whether the audio compression mode described in the acquired audio data attribute (VTS_AST_AT) is compliant with MPEG1 or linear PCM as shown in step 23, and according to the determination result The control signal is output to the register 60A of the audio decoder unit 60.

  As a result, when the selector 60B is switched in accordance with the control signal supplied to the register 60A and the audio encoding mode conforms to MPEG1, the audio data from the system processor unit 54 is sent to the MPEG1 decoder 60C via the selector 60B. When the audio encoding mode conforms to AC3, the audio data from the system processor unit 54 is supplied to the AC3 decoder 60D via the selector 60B, and the video encoding mode conforms to digital PCM. In this case, the audio data from the system processor unit 54 is supplied to the PCM decoder 60E via the selector 60B.

  Further, the system CPU 50 determines whether the audio mode 152 described in the acquired audio data attribute (VTS_AST_ATR) is stereo, monaural, or surround as shown in step 24, and according to the determination result. The control signal is output to the register 202A in the audio reproduction processing unit 202. Thereby, the selector 202B is switched according to the control signal supplied to the register 202A, and when the audio mode 152 is stereo, the audio data from the audio decoder unit 60 is supplied to the stereo output unit 202C via the selector 202B. When the audio mode 152 is monaural, audio data from the audio decoder unit 60 is supplied to the monaural output unit 202D via the selector 202B. When the audio mode 152 is surround, the audio data from the audio decoder unit 60 is sent to the selector 202B. To the surround output unit 202E.

  Next, the system CPU 50 determines whether the mixing mode described in the acquired audio data attribute 125 is not mixable, is a mixable master stream, or is a mixable slave stream as shown in step 25. And a control signal corresponding to the determination result is output to the registers 203A and 203B of the audio mixing unit 203. As a result, the selector 203C is switched in accordance with the control signal supplied to the register 203A. In the case of a master stream that can be mixed as shown in step 25, the first stream is set as the first stream as shown in step 26. In the case of a slave stream that is supplied to the processing unit 203D and can be mixed as shown in step 27, the stream is supplied to the second stream processing unit 203E as a second stream as shown in step 28 and cannot be mixed. In this case, the stream is supplied to the first stream processing unit 203D as the first stream. Further, when the processing of the mixing processing unit 203F is switched according to the control signal supplied to the register 203B and mixing is possible, the first stream of the first stream processing unit 203D and the second stream of the second stream processing unit 203E When the mixing process is performed and output to the speaker unit 8 and mixing is impossible, only the first stream of the first stream processing unit 203D is output to the speaker unit 8.

  Further, the system CPU unit 50 determines whether or not the audio type 153 described in the acquired audio data attribute 125 is a language as shown in step 30, and if this determination result is a language, the language code The language code is acquired from 156, the corresponding language name is determined from the language code table stored in advance in the system ROM & RAM unit 52, and is indicated by the monitor unit 6 or the like as shown in step 31.

  Conversely, when a language code is designated by the user, an audio stream having a target language code can be specified from the number of audio streams 124 and the audio data attribute 125.

  Further, when there is an instruction to switch the audio stream number due to a user event or the like during data reproduction (S32), audio data attribute acquisition setting is performed by the processing from S22 to S31.

  Through the above series of processing, the audio decoder unit 60, the audio reproduction processing unit 202, and the audio mixing unit 203 are optimally set for the video data of the title set to be reproduced. 49, when the video decoder 58 and the video playback processing unit 201 are set according to the audio data attribute (VMGM_AST_ATR), the video management information management table (VMGI_MAT) is used instead of the video title set information management table (VTSI_MAT) 98. ) 78 is read out and the audio data attribute (VMG_AST_ATR) is acquired. In the flow of FIG. 48, when the audio decoder unit 60 and the audio playback processing unit 202 are set according to the audio data attribute (VTSM_AST_ATR), the video title set information management table (VTSI_MAT) is the same as the audio data attribute (VTSM_AST_ATR). ) 98, the audio data attribute (VTSM_AST_ATR) is obtained.

  Next, with reference to the flowchart shown in FIG. 48, the sub-picture attribute information (VTS_AST_AT) in the optical disc playback apparatus and the setting process of the sub-picture decoder 62 and the video playback processing unit 201 according to the attribute information (VTS_SPST_AT) will be described. I will explain. As shown in step 40, the system CPU unit 50 controls the disk drive unit 30 to read the video title set information management table (VTSI_MAT) 98 from the optical disk 10 and temporarily stores it in the data RAM unit 56. As shown in step 41, the system CPU 50 acquires the number of sub-picture streams (VTS_SPST_Ns) recorded in the video title set information management table (VTSI_MAT) stored in the data RAM 56. When a sub-picture stream number that can be selected by the user is designated by the key operation and the operation of the processing unit 4 as shown in step 46, the video title set information management table (VTSI_MAT) stored in the data RAM unit 56 as shown in step 42. The system CPU unit 50 obtains (VTS_AST_AT) corresponding to the user-specified channel number from the sub-picture data attribute (VTS_AST_AT) recorded in (). The system CPU 50 determines whether the sub-picture compression mode described in the acquired sub-picture data attribute (VTS_AST_AT) as shown in step 43 is Raw (corresponding to a bitmap), run length, or others, A control signal corresponding to the determination result is output to the register 62A of the sub-picture decoder unit 62. As a result, the selector 62B is switched according to the control signal supplied to the register 62A, and when the sub-picture compression mode corresponds to the bitmap, the sub-picture data from the system processor unit 54 is transmitted via the selector 62B. When supplied to the map decoder 62C and the sub video compression mode corresponds to the run length, the sub video data from the system processor unit 54 is supplied to the run length decoder 62D via the selector 62B.

  Further, the system CPU 50 determines whether or not the sub-video type 172 described in the acquired sub-video data attribute 127 is a language as shown in step 44, and when the determination result is a language, As shown in step 45, the language code is acquired from the language code, the corresponding language name is determined from the language code table stored in advance in the system ROM & RAM unit 52, and is indicated by the monitor unit 6 or the like.

  Here, when a language code is designated by the user, a sub-video stream having a target language code can be specified from the number of sub-picture streams and the sub-picture data attribute 127. Also, as shown in step 46, when there is a sub-picture stream number switching instruction due to a user event or the like during data reproduction, sub-picture data attribute acquisition setting is executed by the processing from steps S42 to S45.

  Through the above series of processing, the sub-picture decoder unit 62 and the sub-picture reproduction processing unit 207 are optimally set for the video data of the title set to be reproduced. 49, when the sub-picture decoder unit 62 and the sub-picture reproduction processing unit 207 are set according to the sub-picture attribute (VMGM_SPST_ATR), video management information management is performed instead of the video title set information management table (VTSI_MAT) 98. The table (VMGI_MAT) 78 is read, and the sub-picture attribute (VMGM_SPST_ATR) is acquired. 48, when the audio decoder unit 60 and the audio playback processing unit 202 are set according to the sub-picture attribute (VTSM_SPST_ATR), similarly to the sub-picture attribute attribute (VTS_SPST_ATR), the video title set information management table ( A sub-picture attribute attribute (VTSM_SPST_ATR) is acquired from (VTSI_MAT) 98.

  Next, with reference to FIGS. 51 to 53, video data in the logical format shown in FIGS. 4 to 41, a recording method on the optical disc 10 for reproducing the video data, and a recording system to which the recording method is applied. explain.

  FIG. 51 shows an encoder system for generating a video file 88 of a title set 84 in which video data is encoded. In the system shown in FIG. 51, as a source of main video data, audio data, and sub-picture data, for example, a video tape recorder (VTR) 201, an audio tape recorder (ATR) 202, and a sub-picture player (Subpicture, Source) 203 is adopted. These generate main video data, audio data, and sub-video data under the control of the system controller (Syscon) 205, which are a video encoder (VENC) 206, an audio encoder (AENC) 207, and a sub-video encoder (SPENC), respectively. 208, and under the control of the system controller (Syscon) 205, A / D conversion is performed by these encoders 206, 207, and 208, and the encoded main video data, audio data, and Sub-picture data (Comp, Video, Comp, Audio, Comp, Sub-pict) is stored in the memories 210, 211, 212.

  The main video data, audio data, and sub-video data (Comp, Video, Comp, Audio, Comp, Sub-pict) are output to the file formatter (FFMT) 214 by the system controller (Syscon) 205, as described above. Management information such as setting conditions and attributes of each data is stored in the memory 216 by the system controller (Syscon) 205 as a file while being converted into a file structure of video data of this system.

  The standard flow of encoding processing in the system controller (Syscon) 205 for creating a file from video data will be described below.

  The main video data and audio data are encoded according to the flow shown in FIG. 52, and encoded main video and audio data (Comp, Video, Comp, Audio) data are created. That is, when the encoding process is started, parameters necessary for encoding the main video data and audio data are set as shown in step 70 of FIG. Some of the set parameters are stored in the system controller (syscon) 205 and used by the file formatter (FFMT) 214. As shown in step S271, main video data is pre-encoded using parameters, and an optimal code amount distribution is calculated. As shown in step S272, the main video is encoded based on the code amount distribution obtained by the pre-encoding. At this time, audio data is also encoded at the same time. If necessary, as shown in step S273, partial re-encoding of the main video data is executed, and the re-encoded main video data is replaced. Main video data and audio data are encoded by this series of steps. Further, as shown in steps S274 and S275, the sub-picture data is encoded to generate encoded sub-picture data (Comp, Sub-pict). That is, parameters necessary for encoding the sub-picture data are set similarly. Some of the parameters set as shown in step S274 are stored in the system controller (Syscon) 205 and used by the file formatter (FFMT) 214. Sub-picture data is encoded based on this parameter. By this process, the sub-picture data is encoded.

  According to the flow shown in FIG. 53, the encoded main video data, audio data, and sub-video data (Comp, Video, Comp, Audio, Comp, Sub-pict) are combined and described with reference to FIGS. It is converted into such a video data title set structure. That is, as shown in step S276, a cell as a minimum unit of video data is set, and cell reproduction information (C_PBI) related to the cell is created. Next, as shown in step S277, the configuration of the cells constituting the program chain, main video, sub-video, audio attributes, etc. are set (some of these attribute information uses information obtained at the time of each data encoding) As shown in FIG. 21, the video title set information management table information (VTSI_MAT) and the video title set program chain table (VTS_PGCIT) 100 including information on the program chain are created. At this time, a video title set direct access pointer table (VTS_DAPT) is also created as necessary. Encoded main video data, audio data, and sub-video data (Comp Video, Comp Audio, Comp Sub-pict) are subdivided into fixed packs and can be played back in the order of the time code of each data. A video object (VOB) composed of a plurality of cells as shown in FIG. 6 is constructed by arranging each data cell while placing an NV pack at the head, and this video object set is formatted into a title set structure. Is done.

  In the flow shown in FIG. 53, the program chain information is obtained by using the database of the system controller (Syscon) 205 in the process of step S277, or by re-inputting data as necessary. It is described as program chain information (PGI).

  FIG. 54 shows a disc formatter system for recording a title set formatted as described above onto an optical disc. As shown in FIG. 54, in the disc formatter system, these file data are supplied to the volume formatter (VFMT) 226 from the memories 220 and 222 in which the created title set is stored. In the volume formatter (VFMT) 226, management information is extracted from the title sets 84 and 86 to create the video manager 71, and logical data in a state to be recorded on the disc 10 is created in the arrangement order shown in FIG. Error correction data is added to the logical data created by the volume formatter (VFMT) 226 in the disk formatter (DFMT) 228, and reconverted into physical data to be recorded on the disk. In the modulator 230, the physical data created by the disk formatter (DFMT) 228 is converted into recording data to be actually recorded on the disk, and this modulated recording data is recorded by the recorder 232 on the disk 10. To be recorded.

  A standard flow for creating the above-described disc will be described with reference to FIGS. 55 and 56. FIG. FIG. 55 shows a flow for creating logical data to be recorded on the disk 10. That is, as shown in step S280, parameter data such as the number of video data files, the order of arrangement, and the size of each video data file are set first. Next, the video manager 71 is created from the parameters set as shown in step S281 and the video title set information 281 of each video title set 72. Thereafter, as shown in step S282, the data is arranged in the order of the video manager 71 and the video title set 72 along the corresponding logical block numbers, and logical data to be recorded on the disc 10 is created.

  Thereafter, a flow for creating physical data for recording on the disc as shown in FIG. 56 is executed. That is, as shown in step S283, the logical data is divided into a fixed number of bytes, and error correction data is generated. Next, as shown in step S284, the logical data divided into a fixed number of bytes and the generated error correction data are combined to create a physical sector. Thereafter, physical data is created by combining physical sectors as shown in step S285. In this way, the physical data generated in the flow shown in FIG. 56 is subjected to a modulation process based on a certain rule to create recording data. Thereafter, the recording data is recorded on the disk 10.

  The above-described data structure is not limited to the case of recording on a recording medium such as an optical disk, distributing to a user, and reproducing, but can also be applied to a communication system as shown in FIG. That is, according to the procedure shown in FIGS. 51 to 54, the optical disk 10 storing the video manager 71 and the video title set 72 as shown in FIG. 4 is loaded on the playback device 300, and the system CPU section 50 of the playback device The encoded data may be extracted digitally and sent to the user or cable subscriber side by radio or cable by the modulator / transmitter 310. 51 and 54, data encoded on the provider side such as a broadcasting station is created by the encoding system 320, and this encoded data is similarly transmitted to the user or cable subscriber side by radio wave or cable by the modulator / transmitter 310. May be sent to. In such a communication system, the information of the video manager 71 is first modulated by the modulator / transmitter 310 or directly distributed to the user free of charge, and when the user becomes interested in the title, the user or subscriber In response to a request from the user, the title set 72 is sent to the user side by the modulator / transmitter 310 via radio waves or a cable. In the transfer of the title, first, the video title set information 94 is sent under the management of the video manager 71, and then the video object 95 for the title in the video title set reproduced by the title set information 94 is transferred. At this time, if necessary, a video object 95 for a video title set menu is also sent. The transmitted data is received by the receiver / demodulator 400 on the user side and processed as encoded data in the same manner as the reproduction processing described above by the system CPU unit 50 of the reproduction apparatus on the user or subscriber side shown in FIG. Is played.

  In the transfer of the video title set 72, attribute information (VMGM_V_ATR, VMGM_AST_ATR, VMGM_SPST_ATR), (VTSM_V_ATR, VTSM_AST_ATR, VTSM_SPST_ATR), and (VTS_V_ATR, VTS_ATS) is set as the management information of the video data. Video data or the like can be played back under appropriate playback conditions in the playback system on the user side or subscriber side.

    As described above, according to the present invention, when video data is displayed, the video data output method can be arbitrarily changed based on the video data attribute assigned to the video data. The video data in the video title set can be optimally reproduced by referring to the information. In addition, by preparing a plurality of title sets storing video / audio and sub-picture data having different attribute information and storing them on an optical disc, even in a playback system with different standards, it is suitable for the playback system. Video / audio and sub-picture data can be reproduced.

  Further, in the present invention, when there are a plurality of audio streams and sub-picture streams for video data, the attributes for each stream and channel are recorded in the order of the number of each, so that the audio stream of the designated number or The data attribute of the sub-picture stream can be easily acquired, and the playback system can be set to the optimum playback state corresponding to the designated audio stream or sub-picture stream. Information about whether to change the display mode that suits the playback screen for the original video is described as attribute information, so the video, etc. is always played back with the intention of the producer reflected can do.

1 is a block diagram showing an outline of an optical disc apparatus according to an embodiment of the present invention. It is a block diagram which shows the detail of the mechanism part of the disk drive apparatus shown in FIG. FIG. 2 is a perspective view schematically showing a structure of an optical disc loaded in the disc drive apparatus shown in FIG. 1. The structure of the logical format of the optical disk shown in FIG. 3 is shown. 5 shows the structure of the video manager shown in FIG. FIG. 6 is an example showing the structure of a video object set (VOBS) shown in FIG. 5. FIG. 6 shows parameters and contents of a volume manager information management table (VMGI_MAT) in the video manager (VMGI) shown in FIG. 8 is a bit table describing the video attributes of VMGM shown in FIG. It is explanatory drawing which shows the relationship between the display aspect-ratio concerning the description content of the video attribute of VMGM, and a display mode. It is a top view for demonstrating that the display of the letterbox shown by FIG. 9 changes. 8 is a bit table describing the audio stream attributes of VMGM shown in FIG. 8 is a bit table describing VMGM sub-picture stream attributes shown in FIG. 7. 6 shows a structure of a title search pointer table (TSPT) in the video manager (VMGI) shown in FIG. The parameters and contents of the title search pointer table information (TSPTI) of the title search pointer table (TSPT) shown in FIG. The parameters and contents of the title search pointer (TT_SRP) corresponding to the input number of the title search pointer table (TSPT) shown in FIG. The figure for demonstrating the structure of the program chain memorize | stored in a file. 6 shows the structure of a video title set attribute table (VTS_ATRT) in the video manager (VMGI) shown in FIG. The parameters and contents of the video title set attribute table information (VTS_ATRTI) in the video title set attribute table (VTS_ATRT) shown in FIG. 17 are shown. The parameters and contents of the video title set attribute search pointer (VTS_ATR_SRP) in the video title set attribute table (VTS_ATRT) shown in FIG. 17 are shown. The parameters and contents of the video title set attribute (VTS_ATR) in the video title set attribute table (VTS_ATRT) shown in FIG. The structure of the video title set shown in FIG. 4 is shown. The parameters and contents of the video title set information management table (VTSI_MAT) of the video title set information (VTSI) shown in FIG. 22 shows a bitmap table of audio stream attributes (VTS_AST_ATR) described in the table (VTSI_MAT) shown in FIG. The structure of the table (VTS_PGCIT) of video title set program chain information shown in FIG. 21 is shown. The parameters and contents of the video title set program chain information table (VTS_PGCIT) information (VTS_PGCITI) shown in FIG. The parameters and contents of the search pointer (VTS_PGCIT_SRP) of the video title set program chain information table (VTS_PGCIT) shown in FIG. The structure of the program chain information (VTS_PGCI) for the video title set corresponding to the program chain of the video title set program chain information table (VTS_PGCIT) shown in FIG. The parameters and contents of program chain general information (PGC_GI) of the program chain information (VTS_PGCI) shown in FIG. The structure of the program chain map (PGC_PGMAP) of the program chain information (VTS_PGCI) shown in FIG. 27 is shown. The entry cell number (ECELLN) parameters and contents for the program described in the program chain map (PGC_PGMAP) shown in FIG. 28 shows a structure of a cell playback information table (C_PBIT) of program chain information (VTS_PGCI) shown in FIG. The parameters and contents of the cell playback information table (C_PBIT) shown in FIG. 32 are shown. The structure of the cell position information (C_POSI) of the program chain information (VTS_PGCI) shown in FIG. 27 is shown. The parameters and contents of the cell location information (C_POSI) shown in FIG. 33 are shown. The structure of the navigation pack shown in FIG. 6 is shown. The structure of the video, audio, and sub-picture pack shown in FIG. 6 is shown. The parameters and contents of the reproduction control information (PCI) of the navigation pack shown in FIG. 35 are shown. 37 shows parameters and contents of general information (PCI_GI) in the reproduction control information (PCI) shown in FIG. FIG. 36 shows parameters and contents of disc search information (DSI) of the navigation pack shown in FIG. The parameters and contents of the DSI general information (DSI_GI) of the disc search information (DSI) shown in FIG. 39 are shown. 37 shows parameters and contents of the synchronized playback information (SYNCI) of the video object (VOB) shown in FIG. The block diagram which shows the circuit structure of the video decoder part shown in FIG. The block diagram which shows the circuit structure of the audio decoder part shown in FIG. The block diagram which shows the circuit structure of the sub video decoder part shown in FIG. The block diagram which shows the circuit structure of the video reproduction process part shown in FIG. The block diagram which shows the circuit structure of the audio reproduction process part shown in FIG. The block diagram which shows the circuit structure of the audio mixing part shown in FIG. The flowchart for demonstrating the acquisition process of a video data attribute, and the setting process of a reproduction | regeneration system. 6 is a flowchart for explaining audio data attribute acquisition and playback system setting processing. 10 is a flowchart for explaining sub-picture data attribute acquisition and playback system setting processing. 1 is a block diagram illustrating an encoder system that generates video files by encoding video data. FIG. It is a flowchart which shows the encoding process shown by FIG. 53 is a flowchart for creating a video data file by combining main video data, audio data, and sub-picture data encoded in the flow shown in FIG. 1 is a block diagram showing a disk formatter system for recording a formatted video file on an optical disk. FIG. 55 is a flowchart for creating logical data to be recorded on a disc in the disc formatter shown in FIG. 54. It is a flowchart which creates the physical data for recording on a disc from logical data. It is the schematic which shows the system which transfers the video title set shown in FIG. 4 via a communication system.

Explanation of symbols

4 ... Key operation / display section 6 ... Monitor section 8 ... Speaker section 10 ... Optical disk 11 ... Motor drive circuit 12 ... Spindle motor 16 ... Light reflecting layer 24 ... Clamping area 26 ... Lead-out area 27 ... Lead-in area 28 ... Data Recording area 30... Disk drive unit 32... Optical head 32
33 ... Feed motor 36 ... Focus circuit 37 ... Feed motor drive circuit 38 ... Tracking circuit 40 ... Head amplifier 44 ... Servo processing circuit 50 ... System CPU unit 52 ... System ROM / RAM unit)
54 ... System processor 56 ... Data RAM 58 ... Video decoder 60 ... Audio decoder 62 ... Sub-picture decoder 64 ... D / A and data playback unit 70 ... Volume and file structure area 71 ... Video manager (VMG)
72 ... Video title set (VTS)
73 ... Other recording area 74 ... File 75 ... Video manager information (VMGI)
76 ... Video object set for the video manager menu (VMGM_VOBS)
77 ... Backup of video manager information (VMGI BUP)
78 ... Video management information management table (VMGI_MAT)
79 ... Title search pointer table (TT_SRPT)
80 ... Video title set attribute table (VTS_ATRT)
82 ... Video object set (VOBS)
83 ... Video object (VOB)
84 ... cell 95
85 ... Video Object Unit (VOBU)
86 ... Navigation pack (NV pack)
88 ... Video pack (V pack)
90 ... Sub-picture pack (SP pack)
91 ... Audio pack (A pack)
95 ... Video object set menu video object set (VTSM_VOBS)
96 ... Video object set (VTSTT_VOBS) for the title of the video title set
97 ... Backup of video title set information (VTSI) 98 ... Video title set information management table (VTSI_MAT)
99 ... Video title set part of title search pointer table (VTS_PTT_SRPT)
100 ... Video title set program chain information table (VTS_PGCIT)
101 ... Video title set time search map table (VTS_MAPT)
104 ... PGC information (VTS_PGCI)
106 ... Program chain program map (PGC_PGMAP)
107 ... Cell playback information table (C_PBIT)
108 ... Cell position information table (C_POSIT)
111 ... Video title set menu PGCI unit table (VTSM_PGCI_UT)
112 ... Video title set cell address table (VTS_C_ADT)
113 ... VTS_PGCIT search pointer (VTS_PGCIT_SRP)
116 ... PCI packet 117 ... DSI packet 201 ... video playback processing unit 202 ... audio playback processing unit 203 ... audio mixing unit 204 ... frame rate processing unit 205 ... system controller (Sys, con)
206 ... Video encoder (VENC)
207 ... Audio encoder (AENC)
208 ... Sub-picture encoder (SPENC)
215 ... Memory 226 ... Volume formatter (VFMT)
228 ... Disc formatter (DFMT)
230 ... Modulator
232 ... Recorder (Recoder)
320 ... encoding system 310 ... modulator / transmitter

Claims (2)

Display the video manager menu by referring to the start address of the video object set for the video manager menu from the video manager as the management area of the optical disc,
Referring to the title search pointer table of the video manager, obtain a start address of a video title set related to the video title stored on the optical disc,
Obtaining video title set information about the video title set from the video title set;
Obtaining a video title set information management table from the video title set information to obtain a video object set for the video title set menu and a start address of the video object set for the title of the video title set;
In the optical disc playback apparatus for displaying the video object set for the video title set menu from the start address and playing the video object set for the title of the video title set,
Video decoding means for decoding video data included in the menu and title video object sets;
Audio data decoding means for decoding an audio data stream included in the menu and title video object sets;
Sub-picture data decoding means for decoding a sub-picture data stream included in the menu and title video object sets;
Video output means for synthesizing the video output and the sub video output from the video decoding means and the sub video data decoding means, converting the video output to a video signal, and outputting the video signal;
Audio output means for converting the audio output from the audio data decoding means into an audio signal and outputting the audio signal;
Video data attribute for video manager menu including video compression mode and display aspect ratio, audio stream attribute for video manager menu including audio coding mode and sub-picture from the video manager for playback of video object set for the video manager menu A video manager menu sub-picture stream attribute including a coding mode is obtained, and the video decoding means, the audio data decoding means and the sub-picture data decoding means are set based on these, and according to these attributes, the video data, audio data stream and Decode the sub-picture data stream,
For reproducing the video object set for the video title set menu, from the video title set information management table, video data attributes for the video title set menu including a video compression mode and a display aspect ratio, and an audio stream for the video title set menu including an audio coding mode. The video title set menu sub-picture stream attributes including attributes and sub-picture coding mode are acquired and the video decoding means, the audio data decoding means and the sub-picture data decoding means are set based on these, and video data according to these attributes, Decode audio data stream and sub-picture data stream,
Video attributes for title including video compression mode and display aspect ratio, audio stream attributes for title including audio coding mode and sub-picture coding from the video title set information management table for playback of the video object set for title The sub-picture stream attribute for the title including the mode is acquired, and the video decoding means, the audio data decoding means and the sub-picture data decoding means are set based on these, and the video data, the audio data stream and the sub-picture are set according to these attributes. Setting means for decoding the data stream;
An optical disc reproducing apparatus comprising: Display the video manager menu by referring to the start address of the video object set for the video manager menu from the video manager as the management area of the optical disc,
Referring to the title search pointer table of the video manager, obtain a start address of a video title set related to the video title stored on the optical disc,
Obtaining video title set information about the video title set from the video title set;
Obtaining a video title set information management table from the video title set information to obtain a video object set for the video title set menu and a start address of the video object set for the title of the video title set;
In the optical disc playback method of displaying the video object set for the video title set menu from the start address and playing back the video object set for the title of the video title set,
For playback of the video object set for the video manager menu, video data attributes for the video manager menu including a video compression mode and a display aspect ratio, audio stream attributes for the video manager menu including an audio coding mode, and sub-video from the video manager. A sub-picture stream attribute for a video manager menu including a video coding mode is acquired, and video data included in a video object set for the video manager menu is decoded according to these attributes to output a video, for the video manager menu The audio data stream included in the video object set is decoded to output audio, and the video option for the video manager menu is output. Decode the sub-picture data stream included in the object set and output the sub-picture, synthesize the video output and sub-picture output, convert to the video signal and output, and convert the audio output to the audio signal and output And
In the reproduction of the video object set for the video title set menu, the video title set menu audio data including the video compression mode and the display aspect ratio, the video title set menu video data attributes including the video coding mode, and the audio coding mode are reproduced from the video title set information management table. Subtitle stream attributes for a video title set menu including attributes and subpicture coding modes are acquired, and video data included in the video object set for the video title set menu is decoded according to these attributes to output video, and the video The audio data stream included in the video object set for the title set menu is decoded to output audio, and the video is The sub-picture data stream included in the video object set for the title set menu is decoded to output a sub-picture, the video output and the sub-picture output are combined and converted into a video signal, and the audio output is converted into an audio signal. Converted to
For playback of the video object set for the title, the video attribute for the title including the video compression mode and the display aspect ratio, the audio stream attribute for the title including the audio coding mode, and the sub-picture from the video title set information management table. Subtitle stream attributes for the title including the coding mode are acquired, and according to these attributes, video data included in the video object set for the title is decoded to output video, and included in the video object set for the title The audio data stream is decoded to output audio, the sub video data stream included in the title video object set is decoded to output sub video, and the video output and sub video output are Form and outputs the converted video signal, an optical disk reproducing method for causing output by converting the audio output to the audio signal.

Images