JP5120484B2 - REPRODUCTION DEVICE AND REPRODUCTION METHOD, PROGRAM RECORDING MEDIUM, AND PROGRAM - Google Patents

Description

  The present disclosure relates to a playback device, a playback method, a program recording medium, and a program. And the program.

  One of DVD (Digital Versatile Disc) playback-only standards is the DVD video format. In this DVD video format, content data such as video and audio is multiplexed together with various sub-picture data such as subtitles, and recorded as a program stream on a disc. In addition, navigation data for interactively reproducing the stream is recorded on the disc.

  Here, interactive playback refers to playback from a preferred position and playback in a preferred order, as well as a multi-angle function that enables playback of video shot from various angles, and preference from multiple languages. This refers to playback performed by the user using various functions of the DVD, such as a multi-language function that enables playback in any language, and a barrent control function that prevents playback of certain scenes such as violent scenes.

  The program stream can also multiplex a plurality of audio streams and a plurality of caption data streams. This makes it possible to record subtitle data in a plurality of different languages on a single disc for a single video content such as a movie, for example. You can select audio and subtitles in your preferred language.

  By the way, Patent Document 1 discloses a system that allows a user to easily download contents such as sound effects, moving images, and still images that are materials of a video work. Patent Document 2 discloses a technique that can replace a part of music data with other data.

JP 2003-140662 A JP 2002-31967 A

  However, there is a problem that the user can only reproduce the content recorded on the disc attached to the player.

  Therefore, for example, when a disc on which movie content for which only English subtitles are prepared is purchased is purchased, the user can display English subtitles that are recorded in advance on the disc. In order to view the same movie content in which subtitles in a desired language different from the recorded language are displayed, it is necessary to purchase a different disc in which the subtitle information in the desired language is recorded in advance. It was.

  Also, if the disc seller is to sell discs with movie content recorded in multiple countries with different languages, prepare discs with subtitle information for each language in advance, or It is necessary to prepare multiple types of discs, such as English discs and Japanese discs. Therefore, it takes time to prepare such a disk, and in some cases, a large business opportunity is lost.

  In addition, since the display of subtitles such as conventional movie content is recorded as image information such as a bitmap, for example, after the translation process into a predetermined language is completed, for example, the color, size, There is a problem that it takes time and cost to release the content because it takes time and effort to generate the character image information in which the image itself is designated.

  Furthermore, since the display of subtitles such as conventional movie content is recorded as image information such as a bitmap, for example, when displaying video of movie content on a large screen, characters displayed as subtitles are also required. Since the image is enlarged as described above, the display quality may be significantly deteriorated, for example, the outline is broken. In addition, the display size and color of subtitles recorded as image information such as a bitmap or the type of font cannot be changed based on the user's operation input. Or only non-display selection was possible.

  The present disclosure has been made in view of such a situation, and the user can download the update file of the content recorded on the disc to the content recorded on the disc by the user. A subtitle in a desired format can be displayed.

  A playback device according to one aspect of the present disclosure is a playback device that plays back an AV stream recorded on a detachable recording medium and generates caption data for displaying a caption corresponding to the AV stream, Font data holding means for holding font data in advance, storage means for storing at least first information including a character object and attribute data supplied from a server or a removable medium, and recording at least the first information in advance Read control means for controlling the reading of the first information from the recording medium or the storage means, and a character object holding means for holding the character object included in the read first information. Attribute data storage for storing the attribute data included in the read first information A font data acquisition means for acquiring the font data from any one of: a means; the font data holding means; the recording medium; or the storage means; and the character object held by the character object holding means as the attribute Conversion means for converting into subtitle data using the attribute data held by the data holding means and the font data obtained by the font data obtaining means, and an operation input obtaining means for obtaining user operation input, The first information includes an escape code, and the reading control means is information for controlling reading of the AV stream and the first information stored in the storage means. Information and the AV stream recorded on the recording medium And further controlling the reading of the second information based on the user's operation input acquired by the operation input acquisition means, and based on the read second information, the AV stream and The playback apparatus controls reading of the first information.

  First decoding means for decoding the AV stream whose reading is controlled by the reading control means can be further provided.

  There may be further provided output means for synthesizing and outputting the caption data converted by the converting means and the video data included in the AV stream decoded by the first decoding means.

  A second decoding unit that decodes the first information whose reading is controlled by the reading control unit; and a count that counts a count value that serves as a reference for processing timing of the decoding of the AV stream by the first decoding unit And a calculating means for calculating a processing timing reference for decoding the first information by the second decoding means based on the count value counted by the counting means.

  Decoding means for decoding the first information whose reading is controlled by the reading control means can be further provided, and the character object holding means includes the first information included in the first information decoded by the decoding means. A character object is held, and the attribute data holding means can hold the attribute data included in the first information decoded by the decoding means.

  Communication means for exchanging information with the server via a network can be further provided, and the first information received by the communication means can be stored in the storage means.

  Based on the file system of the first data group stored in the recording medium and the file system of the second data group stored in the storage means, the first data group and the second data group Virtual file system generation means for generating a virtual file system including at least a part of each data group may be further provided.

  The first information stored in the storage means includes second information related to generation of the virtual file system, and the read control means stores the second information stored in the storage means. The virtual file system generation means can generate the virtual file system based on the second information whose reading is controlled by the read control means.

  The storage means can store the first information whose entire reading is controlled collectively by the reading control means.

  There is further provided table information generating means for generating table information indicating a relationship between a decoding start point of the first information whose reading is controlled by the reading control means and a time stamp of the decoding start point. The reading control means can control the reading of the first information with reference to the table information generated by the table information generating means.

  A playback method according to an aspect of the present disclosure is a playback method of a playback device that plays back an AV stream recorded on a detachable recording medium and generates caption data for displaying a caption corresponding to the AV stream. From at least the storage medium that stores at least the first information supplied from a server or a removable medium, or at least the first information that includes first information including a character object and attribute data. A read control step for controlling reading of one information, a character object holding step for holding the character object included in the read first information, and the character information included in the read first information. Attribute data holding step that holds attribute data, and font that holds font data in advance A font data acquisition step for acquiring the font data from any one of the data holding unit, the recording medium, and the storage unit, and the character object held by the character object holding step by the attribute data holding step. A conversion step of converting the attribute data and the font data acquired in the font data acquisition step into subtitle data, wherein the first information includes an escape code, and the reading The control step includes: the second information that is information for controlling reading of the AV stream and the first information stored in the storage unit; and the AV stream recorded on the recording medium. Operation to further control reading and acquire user operation input Based on the operation input of the user acquired by the force acquisition means, the reading of the second information is controlled, and based on the read second information, the AV stream and the first information This is a reproduction method for controlling reading.

  A program recording medium according to an aspect of the present disclosure executes a process of generating subtitle data for playing back an AV stream recorded on a removable recording medium and displaying subtitles corresponding to the AV stream. A storage medium for storing at least the first information supplied from a recording medium or a server or a removable medium in which at least first information including a character object and attribute data is recorded in advance. A reading control step for controlling reading of the first information, a character object holding step for holding the character object included in the read first information, and the read first information. An attribute data holding step for holding the attribute data included in the information; Font data acquisition step for acquiring the font data from any one of the font data holding means, the recording medium, or the storage means for holding font data in advance, and the character object held by the character object holding step, A conversion step that converts the attribute data held in the attribute data holding step and the font data acquired in the font data acquisition step into subtitle data, and the first information includes an escape code The read control step is recorded on the recording medium and second information which is information for controlling reading of the AV stream and the first information stored in the storage means. Further reading with the AV stream And controlling the reading of the second information based on the user's operation input acquired by the operation input acquisition means for acquiring the user's operation input, and based on the read second information. A computer-readable program recording medium recording a program for causing a computer to execute processing for controlling reading of the AV stream and the first information.

  A program according to an aspect of the present disclosure causes a computer to execute a process of generating subtitle data for displaying a subtitle corresponding to the AV stream while reproducing the AV stream recorded on a removable recording medium The storage medium storing at least the first information supplied from a server or a removable medium, or at least the first information including a character object and attribute data. A reading control step for controlling reading of the first information, a character object holding step for holding the character object included in the read first information, and the read first information. An attribute data holding step for holding the included attribute data; Font data acquisition step for acquiring the font data from any one of the font data holding means, the recording medium, or the storage means for holding data in advance; and the character object held by the character object holding step, A conversion step that converts the attribute data held in the attribute data holding step and the font data acquired in the font data acquisition step into subtitle data, and the first information includes an escape code The reading control step is recorded on the recording medium and second information that is information for controlling reading of the AV stream and the first information stored in the storage unit. Further controlling reading of the AV stream; Based on the operation input of the user acquired by the operation input acquisition means for acquiring the operation input of the user, the reading of the second information is controlled, and based on the read second information, A program for causing a computer to execute processing for controlling reading of an AV stream and the first information.

  According to the present disclosure, from the storage medium that stores at least the first information including at least the character object and the attribute data, or the storage unit that stores at least the first information supplied from the server or the removable medium The reading of the first information is controlled, the character object included in the read first information is held, the attribute data included in the read first information is held, The font data is acquired from any one of the font data holding unit, the recording medium, or the storage unit that holds font data in advance, and the held character object includes the held attribute data and the acquired It is converted into subtitle data using font data. The first information includes an escape code, and the second information which is information for controlling reading of the AV stream and the first information stored in the storage unit; Further, reading of the AV stream recorded on the recording medium is further controlled, and based on the user operation input acquired by the operation input acquisition means for acquiring the user operation input, the second information Reading is controlled, and reading of the AV stream and the first information is controlled based on the read second information.

  According to the present disclosure, subtitle data corresponding to a displayed subtitle is generated, and in particular, when reproducing an AV stream, a character object and attribute data are used instead of data corresponding to a subtitle converted into image data in advance. It can be acquired and converted into subtitle data.

It is a block diagram which shows the structure of the reproducing | regenerating apparatus in 1st Embodiment to which this indication is applied. It is a figure which shows the example of the application format on the recording medium with which the reproducing | regenerating apparatus in 1st Embodiment to which this indication is applied is mounted | worn. It is a figure for demonstrating the example from which the example of an application format on the recording medium with which the playback apparatus to which this indication is applied is mounted | worn is different. It is a figure for demonstrating the state by which the file was downloaded. It is a figure for demonstrating the structure of AV stream. It is a functional block diagram for demonstrating the function of the controller of FIG. It is a figure which shows the example of the file system of an optical disk, and the file system of a local storage. It is a figure which shows the example of the file system obtained by merging two file systems of FIG. It is a figure for demonstrating the data which can be referred with a play list and a play list. It is a figure for demonstrating the data used as the object distributed additionally. It is a figure which shows the syntax of SubPlayItem. It is a figure for demonstrating the syntax of a text subtitle file. It is a figure for demonstrating the attribute setting by a control character. It is a figure for demonstrating the attribute setting by a control character. It is a figure for demonstrating a markup format identifier and the format of a markup. It is a figure for demonstrating the data structure of subtitle_data () in the case of the attribute designation | designated by a TLV encoding system. It is a figure which shows an escape code. It is a figure for demonstrating the code which shows the attribute classification described in attribute_type. It is a figure which shows the data structure of attribute_value when the described attribute classification is CLUT setting. It is a figure which shows the data structure of attribute_value when the described attribute classification is region origin specification. It is a figure which shows the example of the code which shows rendering direction designation | designated. It is a figure for demonstrating the code described in attribute_value when the described attribute classification is designation | designated of a font style. It is a figure which shows the data structure of attribute_value when the described attribute classification is a bookmark start position designation | designated. It is a figure which shows the data structure of attribute_value when the described attribute classification is bookmark end position specification. It is a figure which shows the data structure of attribute_value when the described attribute classification is character object sequence repetition designation | designated. It is a figure for demonstrating the data structure of subtitle_data () in the case of the attribute designation | designated by a tagged language. It is a figure for demonstrating the format of TaggedAttr. It is a figure for demonstrating the element and attribute classification of an attribute specification by a tagged language. It is a figure for demonstrating a rendering direction. It is a figure for demonstrating a rendering direction. It is a figure for demonstrating a rendering direction. It is a figure which shows the virtual storage area of the local storage of FIG. FIG. 2 is a block diagram for explaining a detailed configuration of a decoder in FIG. 1. It is a block diagram for demonstrating the detailed structure of the text subtitle process part of FIG. 10 is a flowchart for explaining download processing 1; 10 is a flowchart for explaining a reproduction process 1; 6 is a flowchart for explaining content reproduction processing 1; 10 is a flowchart for explaining caption display processing 1; 10 is a flowchart for explaining caption display processing 1; It is a block diagram which shows the structure of the reproducing | regenerating apparatus in 2nd Embodiment to which this indication is applied. It is a functional block diagram for demonstrating the function of the controller of FIG. It is a figure which shows the example of the file system of the optical disk of FIG. It is a figure for demonstrating the data used as the object distributed additionally. It is a figure for demonstrating the archive of the data used as the object distributed additionally. It is a figure for demonstrating the structure of SubPath. FIG. 45 is a diagram showing a list of values that can be specified for operation_type included in the metadata of FIG. 44. It is a figure for demonstrating the update of a file when 0x02 is described in the 8-bit field of operation_type. It is a figure for demonstrating the update of a file when 0x02 is described in the 8-bit field of operation_type. It is a figure for demonstrating the update of a file when 0x03 is described in the 8-bit field of operation_type. It is a figure for demonstrating the update of a file when 0x03 is described in the 8-bit field of operation_type. It is a figure for demonstrating the update of a file when 0x04 is described in the 8-bit field of operation_type. It is a figure for demonstrating the update of a file when 0x04 is described in the 8-bit field of operation_type. FIG. 45 is a diagram showing a list of values that can be specified for permissions included in the metadata of FIG. 44. It is a figure for demonstrating the syntax of a text subtitle file. It is a figure for demonstrating the data structure of subtitle_data () in the case of the attribute designation | designated by a TLV encoding system. It is a figure for demonstrating the code which shows the attribute classification described in data_type. It is a figure for demonstrating the element and attribute classification of an attribute specification by a tagged language. It is a figure for demonstrating the container file in which a text subtitle stream is stored. It is a figure for demonstrating the structural example of the BDAV MPEG-2 transport stream in which a text subtitle stream is stored. 3 is a diagram illustrating a data structure of data stored in a local storage 24. FIG. It is a figure which shows the data structure of a 2nd virtual file system. It is a figure for demonstrating PlayList, Main Path, and Sub path. FIG. 2 is a block diagram illustrating a configuration of a decoder of the playback device in FIG. 1. It is a figure for demonstrating EP_map. FIG. 64 is a block diagram illustrating a configuration of a text subtitle processing unit in FIG. 63. It is a figure for demonstrating the reference of STC. It is a figure for demonstrating the reference of STC. 10 is a flowchart for explaining download processing 2; 10 is a flowchart for explaining a reproduction process 2; It is a flowchart for demonstrating a virtual file system production | generation process. 10 is a flowchart for explaining content reproduction processing 2; It is a flowchart for demonstrating the caption display process 2. FIG. It is a flowchart for demonstrating the caption display process 2. FIG. 10 is a flowchart for explaining content reproduction processing 3; 10 is a flowchart for explaining caption display processing 3; 10 is a flowchart for explaining caption display processing 3;

  Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

  FIG. 1 is a block diagram illustrating a configuration example of a playback device 1 according to the first embodiment to which the present disclosure is applied.

  The controller 21 executes a control program prepared in advance, or controls the optical disc drive 22 to read a navigation program (described later) recorded on the optical disc 11, develops it in the memory 23 and executes it. The overall operation of the playback apparatus 1 is controlled. For example, the controller 21 can display a predetermined menu screen on an external display device when the optical disc 11 is loaded.

  The optical disk drive 22 reads data from the optical disk 11 according to the control by the controller 21 and outputs the read data to the controller 21, the memory 23, or the decoder 26. When the information read from the optical disc 11 is a navigation program or a PlayList, the information read by the optical disc drive 22 is output to the controller 21 or the memory 23. When the information read from the optical disk 11 is an AV stream or text data, the information read by the optical disk drive 22 is output to the decoder 26.

  FIG. 2 is a diagram illustrating an example of an application format of the optical disc 11 mounted on the playback device 1 to which the present disclosure is applied. In addition to the optical disk 11, the recording medium may be, for example, a magnetic disk or a semiconductor memory.

  The application format has two layers, PlayList and Clip, for managing AV (Audio Visual) streams. Here, a pair of one AV stream or text data and Clip Information which is information accompanying the AV stream or text data is considered as one object, and these are collectively referred to as Clip. Hereinafter, an AV stream data file is referred to as an AV stream file. A data file of Clip Information is referred to as a Clip Information file.

  In general, a file used in a computer or the like is handled as a byte string, but the content of an AV stream file is expanded on the time axis, and an access point of a clip is mainly designated by a PlayList with a time stamp.

  When the access point in the Clip is indicated by the PlayList with a time stamp, the Clip Information file is used to find address information to start decoding in the AV stream file from the time stamp.

  The PlayList is a set of information indicating the playback section of the AV stream. Information indicating one playback section in an AV stream is called PlayItem, and PlayItem is represented by a pair of IN point (playback start point) and OUT point (playback end point) of the playback section on the time axis. Therefore, the PlayList is composed of one or a plurality of PlayItems as shown in FIG.

  In FIG. 2, the first PlayList shown first from the left is composed of two PlayItems, and the first PlayList and the second half of the AV stream included in the first Clip shown on the left side by the two PlayItems. Each part is referenced. Also, the second PlayList shown second from the left is composed of one PlayItem, so that the entire AV stream included in the second Clip shown on the right is referred to. Furthermore, the third PlayList illustrated third from the left is composed of two PlayItems, and by the two PlayItems, a predetermined part of the AV stream included in the first Clip illustrated on the left side, and Reference is made to a predetermined portion of the AV stream included in the second Clip shown on the right side.

  The navigation program (Navigation program) is a program for causing the controller 21 to execute the function of controlling the playback order of the PlayList and the interactive playback of the PlayList. The navigation program also has a function of displaying a menu screen for the user to instruct execution of various reproductions. The navigation program is described in a programming language such as Java (registered trademark), and is recorded on a recording medium such as the optical disc 11. For example, when the navigation program is executed by the controller 21 and the first PlayItem included in the first PlayList illustrated first from the left in FIG. 2 is specified as information representing the playback position at that time, The first half portion of the AV stream included in the first Clip shown on the left side referenced by the PlayItem is played back.

  Further, in the PlayList described with reference to FIG. 2, in addition to the main path (Main Path) specified by PlayItem, the sub path specified by using a sub play item (Sub Play Item) as shown in FIG. (Sub path) information can also be included. When SubPlayItem is defined, for example, an independent data stream that is not multiplexed with a Clip (for example, MPEG2 transport stream) specified by PlayItem can be played back in synchronization with AV stream playback.

  For example, subtitle related information composed of a text subtitle file and a font file necessary for rendering, corresponding to the clip AV stream of the main path (Main Path) specified by PlayItem, and the playback section of the subtitle related information By preparing a SubPlayItem that specifies, the subtitles corresponding to the data described in the text subtitle file are displayed in the display font based on the font data described in the font file simultaneously with the playback of the Clip AV stream. It can be displayed on the device.

  Subtitle-related information composed of a text subtitle file and a font file necessary for rendering and SubPlayItem may be recorded in advance on the optical disc 11 or downloaded from the server 3 via the network 2. Alternatively, it may be obtained using a removable medium (for example, a removable medium 28 described later). Details of subtitle-related information and SubPlayItem downloading from the server 3 will be described later with reference to FIG.

  Returning again to the description of FIG.

  The memory 23 appropriately stores data necessary for the controller 21 to execute various processes. The local storage 24 is composed of, for example, an HDD (Hard Disk Drive).

  The Internet interface 25 is connected to the network 2 by wire or wirelessly, communicates with the server 3 via the network 2 according to control from the controller 21, and downloads data downloaded from the server 3 to the local storage. 24. From the server 3, for example, data for updating the data described with reference to FIG. 2 recorded on the optical disc 11 mounted in the playback device 1 at that time is downloaded as content. The local storage 24 can record content downloaded from the server 3 via the network 2.

  The decoder 26 decodes the AV stream or text data supplied from the optical disk drive 22 or the local storage 24, and outputs the obtained video signal and audio signal to an external display device. In the display device, based on the signal decoded by the decoder 26, for example, the content recorded on the optical disc 11 (video display, audio output) is output.

  The operation input unit 29 includes, for example, an input device such as a button, a key, a touch panel, a jog dial, and a mouse, and a receiving unit that receives a signal such as an infrared ray transmitted from a predetermined remote commander, and acquires a user operation input. To the controller 21.

  In addition, a drive 27 is connected to the controller 21 as necessary. For example, a magnetic disk (including a flexible disk), an optical disk (CD-ROM (Compact Disk-Read Only Memory), DVD) A removable medium 28 including a magneto-optical disk (including MD (registered trademark) (Mini-Disk)), a semiconductor memory, or the like.

  Next, a method for reproducing the data recorded on the optical disk 11 mounted on the reproduction apparatus 1 and the data stored in the local storage 24 will be described.

  The playback apparatus 1 includes a local storage 24 including an HDD (Hard Disk Drive). The playback device 1 is connected to the network 2 by wire or wirelessly, and can record the content downloaded from the server 3 via the network 2 in the local storage 24. From the server 3, for example, data for updating content such as a movie recorded on the optical disc 11 mounted on the playback device 1 at that time can be downloaded.

  In a state where the downloaded content is recorded in the local storage 24, when the operation input unit 29 instructs the reproduction of the content recorded on the optical disc 11, the controller 21 stores the content recorded on the optical disc 11. And the content recorded in the local storage 24 are associated with each other, and the content reproduction process is executed.

  Here, a method for reproducing the content recorded on the optical disc 11 and the content recorded on the local storage 24 in association with each other will be described with reference to FIG.

  For example, it is assumed that the optical disk 11 of FIG. 2 is a medium sold as a package, and certain movie content is recorded. Further, it is assumed that only an English text subtitle file is recorded on the optical disc 11 as a subtitle data file that can be displayed superimposed on the movie content video.

  For example, in FIG. 4, the Clip1 AV stream recorded on the optical disc 11 and referred to by the PlayList PlayItem is a stream for displaying the video of the movie content and playing the corresponding audio. The subtitle related information 1 of Clip2 to be referred to is a text subtitle file for displaying English subtitles in conjunction with video display.

  In this state, when subtitles in a language different from English are displayed and movie contents recorded on the optical disc 11 are to be viewed, subtitle data in a language different from English is not recorded on the optical disc 11. The user cannot view the movie by displaying subtitle data in a language different from English in this state.

  Therefore, the user causes the playback device 1 to download a text subtitle file in a desired language of a movie recorded on the optical disc 11 from the server 3 via the network 2 (or obtain it using the removable medium 28). A state in which a text subtitle file, for example, in Arabic that has not been recorded in advance on the optical disc 11 has been downloaded (or copied from the removable medium 28 to the local storage 24) will be described.

  That is, when the user instructs to download a text subtitle file in Arabic corresponding to the PlayList recorded in advance on the optical disc 11, the playback device 1 accesses the server 3 and records it on the optical disc 11. As a content to be updated, a file prepared in the server 3 is downloaded.

  In the example of FIG. 4, for example, a video clip and audio of movie content recorded in advance on the clip 3 and the optical disc 11 composed of an Arabic text subtitle file (subtitle-related information 2) and a clip information file associated therewith. In addition to Clip (AV stream data) and English text subtitle files, the PlayList file (Updated PlayList file) that can control the playback and display of the corresponding subtitle data of Clip 3 is compared with the one recorded on the optical disc 11 The updated new navigation program files are downloaded and recorded in the local storage 24.

  Note that, in the updated play list, SubPlayItem1 and SubPlayItem2 representing sub paths are added in addition to the PlayItem representing the main path. PlayItem of Updated PlayList refers to Clip1 including AV Stream recorded on optical disc 11, SubPlayItem1 refers to Clip2 including subtitle related information 1 recorded on optical disc 11, and SubPlayItem2 Refers to Clip3 including subtitle related information 2 that is an Arabic text subtitle file downloaded from the server 3 together with the updated play list.

  The new navigation program of FIG. 4 can specify SubPlayItem1 or SubPlayItem2 together with the PlayItem of the updated play list as the playback section. Thus, for example, the new navigation program is associated with the desired video and audio data in advance on the optical disc 11 in advance. Of the English subtitles defined by the recorded text subtitle file in English or the Arabic subtitles defined by the text subtitle file in Arabic not previously recorded on the optical disc 11, the subtitles in the language desired by the user Can be displayed.

  As described above, by downloading from the server 3 (or copying from the removable medium 28), the playback apparatus 1 can perform the clip 2 that is an English text subtitle file and the Arabic that is not prepared in advance on the optical disc 11. Any of Clip3, which is a text subtitle file of a word, can be reproduced and displayed as a subtitle of a movie. That is, the user views a movie with a desired language subtitle in English or Arabic by selecting a desired language from among the subtitle languages that can be displayed on the menu screen displayed on the display device. be able to.

  Note that the AV stream recorded on the optical disc 11 has a structure of an MPEG2 (Moving Picture Experts Group 2) transport stream as shown in FIG. The MPEG2 transport stream is composed of an integer number of Aligned units. The size of the Aligned unit is 6144 bytes (2048 × 3 bytes), and starts from the first byte of the source packet. The source packet is 192 bytes long. One source packet is composed of a TP_extra_header and a transport packet. TP_extra_header is 4 bytes long, and the transport packet is 188 bytes long. One Aligned unit is composed of 32 source packets. Video stream and audio stream data are packetized into MPEG2 PES (Packetized Elementary Stream) packets, and PES packets are packetized into transport packets.

  FIG. 6 is a block diagram illustrating a functional configuration example of the controller 21 of FIG.

  Each configuration in FIG. 6 is realized by executing a control program prepared in advance by the controller 21 or by executing a navigation program recorded on the optical disc 11 by the controller 21.

  The menu screen display control unit 31 selects a button operated by the user when selecting the audio or subtitle language of the content recorded on the optical disc 11 or the video angle, or an update file to be downloaded. A menu screen including buttons operated by the user is displayed on an external display device.

  The operation input acquisition unit 32 acquires a signal indicating an operation input from the user, which is input from the operation input unit 29, and outputs a signal indicating the operation input from the user as a menu screen display control unit 31, a data acquisition unit 33, Alternatively, the data is output to a corresponding portion in the reproduction control unit 37.

  The data acquisition unit 33 controls communication performed in the Internet interface 25 in FIG. 1 or information exchange with the removable medium 28 by the drive 27. For example, the data acquisition unit 33 downloads and acquires the update file designated by the user from the server 3 and outputs the acquired file to the local storage directory management unit 34.

  The local storage directory management unit 34 manages a directory of the local storage 24 and controls data writing to the local storage 24 and data reading from the local storage 24. For example, the PlayList read from the local storage 24 under the control of the local storage directory management unit 34 is output to the memory 23, and the audio data and video data of the AV stream and the text of the text subtitle file read from the local storage 24 are read. The data is output to the decoder 26. Further, the local storage directory management unit 34 relates to the file system of the local storage 24 when the file system merge processing unit 36 merges the file system of the optical disk 11 and the file system of the local storage 24, as will be described later. Information is output to the file system merge processing unit 36.

  The optical disc directory management unit 35 manages a directory of the optical disc 11 and controls reading of each data from the optical disc 11. Studio_id and Content_id, which are identification information, are set in the optical disc 11. The Studio_id and Content_id read from the optical disc 11 are transferred to the data acquisition unit 33 and the local storage directory management unit 34 under the control of the optical disc directory management unit 35. Is output. Also, the PlayList read from the optical disc 11 is output to the memory 23 under the control of the optical disc directory management unit 35, and the audio data and video data of the AV stream and the text data of the text subtitle file read from the optical disc 11 are included. Are output to the decoder 26. Further, as will be described later, the optical disk directory management unit 35, when merging the file system of the optical disk 11 and the file system of the local storage 24 is performed by the file system merge processing unit 36, provides information on the file system of the optical disk 11. The data is output to the file system merge processing unit 36.

  The file system merge processing unit 36 merges the file system of the optical disk 11 supplied from the optical disk directory management unit 35 and the file system of the local storage 24 supplied from the local storage directory management unit 34 to create one virtual file. Generate the system. The file system merge processing unit 36 outputs the virtual file system generated by merging to the reproduction control unit 37. Hereinafter, one file system generated by merging by the file system merge processing unit 36 in the first embodiment will be referred to as a first virtual file system as appropriate.

  The playback control unit 37 executes the navigation program specified by the first virtual file system supplied from the file system merge processing unit 36 and controls the playback of the content. Specifically, the playback control unit 37 is supplied to the memory 23, refers to the stored PlayList, controls the local storage directory management unit 34 or the optical disc directory management unit 35, and is recorded on the optical disc 11 or the local storage 24. The audio data, video data, and text data of the text subtitle file as required are read out, and the decoder 26 in FIG. 1 is controlled to record the AV recorded in the optical disc 11 or the local storage 24. Stream audio data, video data, and, if necessary, text data of a text subtitle file are decoded (reproduced).

  Here, the merging of the file system of the optical disc 11 and the file system recorded in the local storage 24 by downloading from the server 3 or the like performed by the file system merge processing unit 36 will be described. For example, this merging is performed when reproduction of content recorded on the optical disc 11 is instructed.

  FIG. 7 is a diagram illustrating an example of the file system (left side) of the optical disc 11 and the file system (right side) of the local storage 24. As shown in the figure, each file system has a directory structure.

  A folder with the name “BDMV” is prepared under “root” on the optical disc 11, and a file with the name “info.bdmv” and the name “Navigation.class” are provided in the folder. The set file is stored. Hereinafter, these files are appropriately referred to as an info.bdmv file and a Navigation.class file, respectively. Similarly, other files and folders are referred to by adding “file” to “file name” or adding “folder” to “folder name”.

  In the info.bdmv file, Studio_id, which is identification information of the producer of the optical disc 11, and Content_id, which is content identification information, are described.

  That is, the content recorded on the optical disc 11 is identified from the entire content to be distributed by Studio_id and Content_id. In the example of FIG. 7, Studio_id is “xxx”, and Content_id is “yyy”. Studio_id and Content_id are also used to identify the update file to be downloaded.

  The Navigation.class file is a navigation program described in a predetermined program language.

  The BDMV folder also has a folder with the name “PLAYLIST” (PLAYLIST folder), a folder with the name “CLIPINF” (CLIPINF folder), and a folder with the name “STREAM” (STREAM folder) Is stored.

  In FIG. 7, the PLAYLIST folder stores a file set with the name “11111.mpls” and a file set with the name “22222.mpls”. These files are PlayLists that represent playback sections such as AV stream files with time stamps.

  The CLIPINF folder stores a file with the name “01000.clpi” and a file with the name “02000.clpi”. These files are Clip Information indicating the correspondence between the time stamp and the address information of the AV stream file or caption related information 1 (FIG. 4).

  The STREAM folder stores a file with the name “01000.m2ts” and a file with the name “02000.m2ts”. These files include the AV stream and caption related information 1 in FIG.

  On the other hand, a folder in which the name “xxx-yyy” is set is stored under “root” of the local storage 24. The folder name “xxx-yyy” indicates that the data stored in the folder corresponds to the content recorded in the optical disc 11 and identified by Studio_id “xxx” and Content_id “yyy”. Represent. As will be described later, in the xxx-yyy folder, the optical disc 11 having Studio_id “xxx” and Content_id “yyy” is mounted on the playback device 1, and an update file (each file stored in the xxx-yyy folder) is downloaded. It is created when it is broken.

  The xxx-yyy folder stores info.bdmv file and Navigation.class file. The info.bdmv file is the same as the info.bdmv file on the optical disc 11, and the Navigation.class file is a file obtained by updating the Navigation.class file on the optical disc 11. That is, the Navigation.class file in the local storage 24 is a file that describes a navigation program that has been upgraded compared to that recorded on the optical disc 11.

  The xxx-yyy folder further stores a PLAYLIST folder, a CLIPINF folder, and a STREAM folder.

  In FIG. 7, a file set with the name “11111.mpls” and a file set with the name “22222.mpls” are stored in the PLAYLIST folder of the local storage 24, of which “22222.mpls” The file with the name “” is an updated file of the file with the same name on the optical disc 11. For example, a file in which the name “22222.mpls” in the local storage 24 is set represents the downloaded Update PlayList (FIG. 4), and data in which SubPlayItem is added to the PlayList is described in this file.

  In the CLIPINF folder of the local storage 24, in addition to the file set with the name “01000.clpi” and the file set with the name “02000.clpi” recorded on the optical disc 11, “04000. A file with the name "clpi" is stored. That is, the file with the name “04000.clpi” is a file newly acquired by downloading, for example, Clip Information of Clip 3 in FIG.

  In the STREAM folder of the local storage 24, a file having the name “04000.m2ts” is stored. This file is a file newly acquired by downloading, and is, for example, the subtitle related information 2 of Clip 3 in FIG.

  Similarly, in the example of FIG. 7, under “root” in the local storage 24, there are a folder set with the name “xxx-aaa” and a folder set with the name “yyy-bbb”. Stored. These were created when the optical disc identified by Studio_id “xxx” and Content_id “aaa” and the optical disc identified by Studio_id “yyy” and Content_id “bbb” were mounted on the playback device 1, respectively. A file corresponding to each content is stored.

  When there is such a file system of the optical disk 11 and a file system of the local storage 24, the file system merge processing unit 36 of the controller 21 merges the file system of the optical disk 11 and the file system of the local storage 24 on the memory 23. A first virtual file system is generated.

  Specifically, when a file with the same name exists in both the optical disc 11 and the local storage 24, the file system merge processing unit 36 downloads based on the time stamp (creation date) and version described in each file. Merging is performed so that the file acquired by the above is used as a file to be referred to when the content is reproduced. Further, the file system merge processing unit 36 performs merging so that a file that is not in the optical disc 11 but only in the local storage 24 is a file to be referred to when content is reproduced.

  FIG. 8 is a diagram illustrating an example of a first virtual file system obtained from the two file systems of FIG.

  In FIG. 8, among the files recorded on the optical disc 11, the file with the name “Navigation.class” and “22222.mpls” is updated (replaced) with the downloaded file. . Further, a file set with the name “04000.clpi” and a file set with the name “04000.m2ts”, which are not recorded on the optical disc 11, are added.

  That is, if the downloaded file includes an updated navigation program or PlayList, the file with the same name on the optical disc 11 is updated (replaced) by the file. When a clip file (Clip Information file, AV stream file) that is not on the optical disk 11 is downloaded, it is added to the file system.

  The AV stream based on the navigation program is accessed through the first virtual file system generated in this way (the optical disk 11 and the local storage 24 are not directly accessed).

  Therefore, by the processing of the new navigation program newly downloaded or copied, the data stored in advance on the optical disc 11 and the data newly downloaded or copied and stored in the local storage 24 are not distinguished. Is done. As shown in FIG. 9, subtitle related information for displaying subtitles corresponding to AV streams in a predetermined section includes text subtitle data constituting text subtitle files corresponding to subtitles in a plurality of languages, font files 2, subtitle related information stored in advance on the optical disk 11 and subtitle related information newly downloaded or copied and stored in the local storage 24 based on user operation input. Of the subtitles in a plurality of languages that can be displayed, subtitle data in the language desired by the user is processed in association with the AV stream stored in advance on the optical disc 11 and displayed.

  On the other hand, the optical disc seller (seller, producer), for example, will provide Arabic subtitle information later via the network 2, and the movie is recorded in a state where only English subtitles can be displayed. The optical disk 11 can be sold. In other words, the optical disc seller can sell the disc at an earlier timing without translating multiple languages at once, and additionally provide subtitle related information corresponding to other languages as needed. It becomes possible. Also, optical discs will be pre-sold in the regions corresponding to the main languages, and after the translation processing for other languages is completed, the optical disc sales region will be added later, and the text subtitle file download service for the corresponding languages will be started. It is also possible to do so.

  The optical disc seller (seller, producer) can display subtitle data in association with an AV stream stored in advance on the optical disc 11, at least a new playlist file updated, It is necessary to distribute a text subtitle file, and in addition to this, a font file for defining a subtitle display format corresponding to text data described in the text subtitle file may be distributed. It is assumed that basic font data is stored in advance in the memory 23 of the playback apparatus 1 or the like.

  FIG. 10 shows an archive of data to be additionally distributed (that is, corresponding to data stored in the local storage 24 described with reference to FIG. 4).

  The additionally distributed data includes a playlist file (PlayList_file), 8-bit number information (number_of_TextSubTitle) indicating the number of the text subtitle file, and a text subtitle file (text_subtitle_file) corresponding to the text subtitle file described above. In addition, a font file (font_file) may be included.

  FIG. 11 is a diagram illustrating the syntax of SubPlayItem.

  The 8-bit field of ref_to_STC_id specifies the identifier of the STC sequence referred to by Clip. SubPlayItem_IN_time specifies the playback start time of SubPlayItem. SubPlayItem_OUT_time specifies the playback end time of SubPlayItem. That is, the SubPlayItem playback section can be specified by SubPlayItem_IN_time and SubPlayItem_OUT_time. Note that the time information described in SubPlayItem_IN_time and SubPlayItem_OUT_time is expressed based on the 45 kHz clock used in the STC.

  The 8-bit field of number_of_ClipTextSubtitle specifies the total number of subtitle texts defined in SubPlayItem. An 8-bit field of language_id designates an identifier of a language used as a caption. The data in the language_id field shall conform to the ISO / IEC 639-1 standard. The 8-bit field of character_code_id specifies an identifier of the encoding method of character data. The 8-bit field of font_format_id specifies a font format identifier.

  The 16-bit field of font_file_path_length specifies the number of bytes of the font file path name described in font_file_path. In this field, 0 can be specified as the number of bytes of font_file_path. When 0 is designated, the processing is performed assuming that the built-in font stored in advance in the playback apparatus 1 is designated. font_file_path specifies the path name of the font file used for rendering the caption data. When an empty character string is specified in the font_file_path field, processing is performed assuming that a built-in font stored in advance in the playback apparatus 1 is specified. font_file_path This field value shall be encoded in ISO / IEC 646 format.

  The 16-bit field of subtitle_file_path_length specifies the number of bytes of the path name of the text subtitle file described in subtitle_file_path. subtitle_file_path specifies the path name of the text subtitle file. The subtitle_file_path field value shall be encoded in ISO / IEC 646 format.

  The 16-bit field of comment_length specifies the number of bytes of information described in comment. Comment describes a text subtitle comment. The comment described in Comment is described using the character set ISO / IEC 646.

  The text subtitle file is described according to the syntax shown in FIG.

  version is 16-bit information that specifies the version of the text subtitle file. The markup_type is 8-bit information that specifies the markup format. subtitle_count is 32-bit information that specifies the total number of subtitle data. (Subtitle_count is not the total number of line feed codes.) Start_PTS is 33-bit information that specifies the display start time of the subtitles using the PTS of the Clip AV stream. end_PTS is 33-bit information that designates the display end time of subtitles using the PTS of the Clip AV stream. The subtitle_data_length is 32-bit information that specifies the number of bytes of subtitle_data (not the number of subtitle characters). subtitle_data is information specifying subtitle data.

  The caption data is composed of a “character object” and “attribute data (attribute)” indicating the characters themselves constituting the caption. Describes how to set attribute data.

  There are two attribute setting methods for the attribute data of subtitle data: attribute setting by control characters and inline attribute setting by markup.

  First, attribute setting by control characters will be described with reference to FIGS. 13 and 14.

  The character “Tab” shown in FIG. 13 is treated as a space character. Needless to say, it is possible to set a plurality of characters other than “Tab” that can be handled as blank characters.

  Further, all the characters shown in FIG. 14 are handled as line feed characters. That is, “CR” is a symbol indicating carriage return but is treated as a line feed character, “LF” is treated as a line feed character, and “CR + LF” is a symbol indicating carriage return and a line feed but is treated as a line feed character. , “NEL” is treated as a line feed character, “VT” is a symbol indicating a vertical tab but is treated as a line feed character, “FF” is a symbol indicating a page break, but is treated as a line feed character, “LS” is a symbol indicating a line break, but is treated as a line feed character, and “PS” is a symbol indicating a paragraph break, but is treated as a line feed character.

  Next, inline attribute setting by markup will be described.

  Markup is defined for each specifiable attribute. There are two markup formats: markup with TLV (Type-Length-Value) encoding format and markup with tagged language elements and attributes. As shown in FIG. When the markup format identifier is 0x00, the markup format is defined as a TLV encoded format, and when the markup format identifier is 0x01, the markup format is defined as a tagged language. . In either format, the scope of the markup is all characters after the start marker, and no end marker is defined to allow one-way scanning of the decoder that decodes the text data. Therefore, when it is desired to specify an attribute locally, it is necessary to explicitly respecify the immediately preceding attribute.

  First, a case where attribute designation by the TLV encoding method is performed will be described. In the case of attribute specification by the TLV encoding method, the character encoding method of subtitle data is based on the specification of character_code_id in SubPlayItem described with reference to FIG.

  The data structure of subtitle_data () in the case of attribute designation by the TLV encoding method will be described using FIG.

  In the 8-bit field of escape_code, as shown in FIG. 17, an escape code 0x1B indicating that an attribute is described later is designated. The attribute_type 8-bit field specifies the attribute type. The code described in attribute_type will be described later with reference to FIG. The 16-bit field of attribute_value_length specifies the number of bytes of attribute data that follows. attribute_value specifies attribute data. char_data specifies the byte sequence of the character object.

  Next, a code indicating the attribute type described in attribute_type will be described with reference to FIG.

  When 0x01 is described in the 8-bit field of attribute_type of subtitle_data (), the attribute type described is the setting of CLUT (Color Look Up Table), which is a conversion table between index data and representative color data. is there. CLUT is a conversion table stored in a caption graphics plane processing unit described later with reference to FIG. When 0x02 is described in the 8-bit field of attribute_type of subtitle_data (), the type of attribute described is designation of the region origin. When 0x03 is described in the 8-bit field of attribute_type of subtitle_data (), the type of attribute described is designation of line space. When 0x04 is described in the 8-bit field of attribute_type of subtitle_data (), the type of attribute described is designation of the rendering direction. When 0x05 is described in the 8-bit field of attribute_type of subtitle_data (), the type of attribute described is designation of font color. When 0x06 is described in the 8-bit field of attribute_type of subtitle_data (), the type of attribute described is designation of the background color. When 0x07 is described in the 8-bit field of attribute_type of subtitle_data (), the type of attribute described is specification of a font style. When 0x08 is described in the 8-bit field of attribute_type of subtitle_data (), the type of attribute described is specification of font size.

  When 0x09 is described in the 8-bit field of attribute_type of subtitle_data (), the type of attribute described is designation of font rotation angle. When 0x0A is described in the 8-bit field of attribute_type of subtitle_data (), the type of attribute described is the bookmark start position. When 0x0B is described in the 8-bit field of attribute_type of subtitle_data (), the type of attribute described is the bookmark end position. When 0x0C is described in the 8-bit field of attribute_type of subtitle_data (), the type of attribute described is designation of repetition of a character object sequence to which a bookmark is attached.

  When the attribute type described in attribute_type of subtitle_data () is CLUT setting, the CLUT index in the caption graphics plane processing unit described later with reference to FIG. 33 is set in attribute_value. FIG. 19 shows the data structure of attribute_value when the attribute type described in subtitle_data () attribute_type is CLUT setting.

  The CLUT_size 8-bit field describes the CLUT size. Y is 8-bit information for setting luminance data, Cb and Cr are 8-bit information for setting color-difference data, respectively, and T is 8-bit information for setting transparency.

  In attribute_type of subtitle_data (), when the described attribute type is region origin specification, the origin coordinate (x, y) of the region is specified in attribute_value. FIG. 20 shows the data structure of attribute_value when the attribute type described in the attribute_type of subtitle_data () is the region origin designation.

  x_coordonate is 16-bit information indicating the x coordinate of the origin of the region. y_coordonate is 16-bit information indicating the y coordinate of the origin of the region.

  In addition, when the attribute type described in the attribute_type of subtitle_data () is a line space specification, the line spacing is specified in pixel units in the attribute_value. Note that the default of the line space designation may be “font height”.

  In the attribute_type of subtitle_data (), when the described attribute type is rendering direction designation, the attribute_value describes a code indicating rendering direction designation for designating the rendering direction when drawing a character object. FIG. 21 shows an example of a code indicating the rendering direction designation.

  That is, in the attribute_type of subtitle_data (), when the attribute type described is rendering direction specification, when 0x00 is described in attribute_value, the rendering direction when drawing a character object is specified from left to right When attribute_value is set to 0x01, the rendering direction when drawing a character object is specified from right to left, and when attribute_value is set to 0x02, rendering is performed when a character object is drawn. The direction is specified from top to bottom.

  In the attribute_type of subtitle_data (), when the described attribute type is font color designation, the attribute_value designates the color designation index for CLUT in the subtitle graphics plane processing unit to be described later with reference to FIG. . The default value of attribute_value for setting the font color may be “0”.

  In the attribute_type of subtitle_data (), when the described attribute type is background color designation, the attribute_value designates the background color index for CLUT in the caption graphics plane processing unit described later with reference to FIG. . However, the area in the display screen that is filled with the specified background color may be in units of regions, and the default background color may be unspecified (transparent).

  In the attribute_type of subtitle_data (), when the described attribute type is a font style specification, one of the codes shown in FIG. 22 is described in attribute_value, and the font style is specified. That is, when 0x00 is written in attribute_value, the font style is specified as standard, when 0x01 is written in attribute_value, font style is specified in bold, and 0x02 is written in attribute_value The font style is specified in italics. The default font style may be “standard”.

  In the attribute_type of subtitle_data (), when the described attribute type is a font size specification, a value of 8 to 72 indicating the font size is specified in attribute_value. The default value for specifying the font size may be “32”.

  In attribute_type of subtitle_data (), when the described attribute type is a font rotation angle specification, a value between 0 and 360 corresponding to the font rotation angle is specified in attribute_value. Note that the rotation direction may be, for example, a positive direction counterclockwise, and the default may be “0”.

  In the attribute_type of subtitle_data (), when the described attribute type is bookmark start position designation, the bookmark start position is designated in attribute_value. The bookmark is information given in advance by the supplier of the text subtitle file so that the rendering process can be omitted when the same character is displayed in the same format a plurality of times. FIG. 23 shows the data structure of attribute_value when the described attribute type is bookmark start position designation in attribute_type of subtitle_data ().

  An 8-bit field of bookmark_id describes an ID that can uniquely distinguish a bookmark. Here, up to 256 bookmarks can be specified. In the 8-bit field of start_of_bookmark_indicator, the start position of the bookmark is specified.

  In the attribute_type of subtitle_data (), when the described attribute type is bookmark end position designation, the bookmark end position is designated in attribute_value. FIG. 24 shows the data structure of attribute_value when the described attribute type is the bookmark end position designation in the attribute_type of subtitle_data ().

  An 8-bit field of bookmark_id describes an ID that can uniquely distinguish a bookmark. The end position of the bookmark is specified in the 8-bit field of end_of_bookmark_indicator.

  In the attribute_type of subtitle_data (), when the described attribute type is a character object sequence repetition specification, the attribute_value specifies the number of repetitions of the sequence of the character object to which the bookmark is attached. FIG. 25 shows the data structure of attribute_value when the attribute type described in attribute_type of subtitle_data () is a character object sequence repetition designation.

  An 8-bit field of bookmark_id describes an ID that can uniquely distinguish a bookmark. In the 8-bit field of Count, the number of bookmark repetitions is specified.

  Next, the case of attribute specification in a tagged language will be described. In the case of attribute specification in a tagged language, the character encoding method of subtitle data is assumed to be ISO / IEC 646 encoding, ignoring the specification of character_code_id in SubPlayItem.

  The data structure of subtitle_data () in the case of attribute designation in a tagged language will be described using FIG.

  TaggedAttr specifies a tagged language representation of attribute data. TaggedAttr follows a predetermined format as shown in FIG. char_data specifies the byte sequence of the character object. However, the byte sequence shall be ISO / IEC 646 encoded by the BASE64 encoding method. At that time, “<” and “>” are escaped by “0x1B”.

  Next, with reference to FIG. 28, description will be given of elements and attribute types for attribute designation in a tagged language.

  The CLUT setting is described as <CLUT size = y = cb = cr = t =>, the size of the CLUT is specified in the attribute “size”, and the attributes “y”, “cb”, “cr” and “t” Specifies a CLUT index string in a caption graphics plane processing unit to be described later with reference to FIG.

  The region origin designation is described as <region x = y =>, and the origin coordinates (x, y) of the region are designated in the attributes “x” and “y”.

  The line space designation is described as <linespace d =>, and the line spacing is designated in the attribute “d” in units of pixels. Note that the default between lines may be “font height”.

  The rendering direction designation is described as <textflow d =>, and the direction for drawing the character object is designated in the attribute “d”. The default rendering direction may be “from left to right”.

  The font color designation is described as <fontcolor c =>, and an index for the CLUT in the caption graphics plane processing unit, which will be described later with reference to FIG. 33, is designated in the attribute “c”. The default index corresponding to the font color may be “0”.

  The background color designation is described as <backgroundcolor c =>, and an index for the CLUT in the caption graphics plane processing unit described later with reference to FIG. 33 is designated in the attribute “c”. However, the area filled with the background color may be in units of regions, and the default background color may be unspecified (transparent).

  The font style specification is described as <fontstyle s =>, and a font style such as bold, italic, or standard is specified in the attribute “s”. The default font style may be “standard”.

  The font size designation is described as <fontsize s =>, and a value of 8 to 72 corresponding to the font size is designated in the attribute “s”. The default value for specifying the font size may be “32”.

  The font rotation angle designation is described as <fontrotate a =>, and a value between 0 and 360 corresponding to the rotation angle of the font is designated in the attribute “a”. The rotation direction may be counterclockwise as a positive direction, and the default value corresponding to the rotation angle of the font may be “0”.

  The bookmark designation is described as <mark id =>, and a value of 0 or more and 255 or less that can distinguish the bookmark individually is designated in the attribute “id”. As a result, a bookmark is assigned to the caption data within the scope of this element. Up to 256 bookmarks can be specified.

  The character object sequence repeat specification is described as <repeat id = c =>, the attribute “id” is a value from 0 to 255 that can distinguish the bookmark individually, and the attribute “c” is the repeat count. The Thereby, the caption data provided with the bookmark corresponding to the attribute value set by the attribute “id” is repeated the number of times set in the attribute “c”.

  The text data of a text subtitle file whose attributes are specified by the above-described method is set by setting the rendering direction from left to right as shown in FIG. 29, for example, based on the setting of each attribute. In FIG. 30, the line is displayed in a line that is line-down in the downward direction, or the rendering direction is designated from right to left as shown in FIG. As shown in FIG. 4, the rendering direction is designated from the top to the bottom, and the line is displayed in the left direction at the set line feed position.

  Also, for example, when designating fade-in or fade-out for the displayed subtitle, the transparency value of the character is changed by changing the T value of CLUT in the subtitle graphics plane processing unit to be described later using FIG. However, the character object sequence may be repeatedly specified.

  Next, FIG. 32 is a diagram showing a virtual storage area of the local storage 24.

  As described with reference to FIG. 4, the local storage 24 stores various types of information downloaded or copied in the file format described with reference to FIG. In order to store these files, the local storage 24 stores, as a virtual storage area, a navigation program storage unit 51 that is an area for storing a downloaded navigation program, and an area for storing a downloaded playlist. A playlist storage unit 52, a text subtitle file storage unit 53 that stores downloaded text subtitle files, and a font file storage unit 54 that stores downloaded font files. Can be. The data files stored in the navigation program storage unit 51 and the playlist storage unit 52 are read out and supplied to the memory 23 based on the control of the local storage directory management unit 34 described with reference to FIG. The data files stored in the storage unit 53 and the font file storage unit 54 are read out and supplied to the decoder 26 under the control of the local storage directory management unit 34 described with reference to FIG.

  The storage areas of the navigation program storage unit 51, the playlist storage unit 52, the text subtitle file storage unit 53, and the font file storage unit 54 of the local storage 24 illustrated in FIG. 32 are virtual. Therefore, it goes without saying that the storage area of the local storage 24 may not be physically divided according to the type of information stored as shown in FIG.

  Under the control of the controller 21, the data read from the optical disk 11 or the local storage 24 is demodulated by a demodulation and ECC decoding unit (not shown), subjected to error correction, and supplied to the decoder 26. FIG. 33 is a block diagram for explaining a detailed configuration of the decoder 26.

  The decoder 26 includes a control unit 81, a disk data acquisition unit 82, buffers 83 and 84, a PID (packet ID) filter 85, an audio decoder 86, an MPEG (Moving Picture Experts Group) video decoder 87, a video plane processing unit 88, a GUI. (Graphic User Interface) A data decoder 89, a GUI graphics plane processing unit 90, a storage data acquisition unit 91, a text subtitle processing unit 92, a subtitle graphics plane processing unit 93, and a composition processing unit 94 are provided.

  The control unit 81 controls processing of each unit of the decoder 26 based on the control of the reproduction control unit 37. The disc data acquisition unit 82 acquires the data supplied to the decoder 26 among the data read from the optical disc 11, and outputs a multiplexed stream such as an AV stream specified by PlayItem described with reference to FIG. Text subtitle file or font file data specified by SubPlayItem is supplied to the buffer 83 which is a read buffer of data specified by PlayItem constituting the main path (data of font file may not be specified) Are supplied to a buffer 84 that is a read buffer for data specified by SubPlayItem constituting the sub path.

  The stream data read from the buffer 83 is output to the subsequent PID filter 55 at a predetermined timing. The PID filter 85 distributes the input multiplexed stream to the audio decoder 86, the MPEG video decoder 87, or the GUI data decoder 89, which is a decoder of each elementary stream in the subsequent stage, according to the PID. That is, the PID filter 55 supplies an audio (audio) stream to the audio decoder 86, supplies a video (video) stream to the MPEG video decoder 87, and supplies user interface-related image data to the GUI data decoder 89.

  The audio decoder 86 decodes the audio stream and outputs the decoded audio stream data. The MPEG video decoder 87 decodes the video stream and outputs the decoded video data to the video plane processing unit 88. The video plane processing unit 88 generates a video plane corresponding to an image displayed on one page (or one frame) (an image constituting a moving image) based on the decoded video data, and synthesizes the video plane The data is output to the processing unit 94.

  The GUI data decoder 89 decodes the interactive graphics stream and supplies the decoded GUI data to the GUI graphics plane processing unit 90. The GUI graphics plane processing unit 90 generates a graphics plane corresponding to the GUI displayed on one screen and outputs it to the synthesis processing unit 94.

  The storage data acquisition unit 91 acquires data supplied to the decoder 26 (that is, text subtitle file or font file data) out of the data read from the local storage 24 and supplies the data to the text subtitle processing unit 92. . The text subtitle processing unit 92 decodes text data supplied from the storage data acquisition unit 91 or read from the buffer 84 under the control of the control unit 81, and based on predetermined font data, a raster such as a bitmap The data is converted (rasterized) and supplied to the caption graphics plane processing unit 93. Details of the text subtitle processing unit 92 will be described later with reference to FIG. The subtitle graphics plane processing unit 93 generates a subtitle graphics plane corresponding to the subtitle displayed on one page (or one frame) based on the decoded and rendered text data, and outputs the subtitle graphics plane to the synthesis processing unit 94 To do.

  The composition processing unit 94 is supplied from the video plane supplied from the video plane processing unit 88, the graphics plane corresponding to the GUI supplied from the GUI graphics plane processing unit 90, and the subtitle graphics plane processing unit 93. The subtitle graphics plane is synthesized and output as a video signal.

  FIG. 34 is a block diagram for explaining a detailed configuration of the text subtitle processing unit 92.

  The text data decoder 121 decodes the data of the text subtitle file (text subtitle file), and supplies the character object to the character object buffer 122 and the attribute (attribute) to the attribute data buffer 123.

  The attribute data stored in the attribute data buffer 123 is changed under the control of the control unit 81 based on a user operation input. For example, when the user instructs to change the font size or the character color, the corresponding code in the attribute data stored in the attribute data buffer 123 is rewritten under the control of the control unit 81.

  The font rasterizer 124 is based on the designation of the attribute read from the attribute data buffer 123, the font data supplied from the buffer 84 or the storage data acquisition unit 91, or the built-in font data previously held in the playback device 1. The character object read from the character object buffer 122 is converted into raster data such as a bitmap and output to the caption graphics plane processing unit 93. For example, the font rasterizer 124 rasterizes a scalable font based on attribute designation, converts it into raster data (rasterization), and outputs the raster data.

  Furthermore, the font rasterizer 124 detects a character object to which a bookmark is assigned based on the attribute read from the attribute data buffer 123, and uses the bookmark buffer 125 to detect a character object to which the same bookmark ID is assigned. As for, do not perform rasterization redundantly.

  The bookmark buffer 125 holds the raster data of the character object to which the bookmark is given by the processing of the font rasterizer 124, and the raster data held by the font rasterizer 124 is read out.

  Next, the download process 1 that is the process of the controller 21 of the playback apparatus 1 that downloads the update file from the server 3 will be described with reference to the flowchart of FIG.

  This process is performed when the optical disc 11 is mounted on the playback apparatus 1 and, for example, an instruction to download an Arabic text subtitle file corresponding to movie content with English subtitles recorded on the optical disc 11 is issued from the menu screen. Executed.

  In step S <b> 1, the optical disc directory management unit 35 of the controller 21 controls the optical disc drive 22 and reads Studio_id and Content_id recorded on the optical disc 11. As described with reference to FIG. 7, Studio_id and Content_id are described in the info.bdmv file. The optical disc directory management unit 35 outputs the Studio_id and Content_id read from the optical disc 11 to the data acquisition unit 33 and the local storage directory management unit 34.

  In step S 2, the data acquisition unit 33 controls the Internet interface 24 and transmits Studio_id and Content_id supplied from the optical disc directory management unit 35 to the server 3 via the Internet 2. In the server 3 that has received the Studio_id and Content_id transmitted here, the content of the optical disc 11 mounted on the playback device 1 is identified. At this time, for example, a list of files that can be updated is notified from the server 3 to the playback apparatus 1. The data acquisition unit 33 acquires a list of updatable files transmitted from the server 3 and received by the Internet interface 24 and supplies the list to the menu screen display control unit 31.

  In step S3, the menu screen display control unit 31 displays an update menu screen on the display device, proceeds to step S4, and on the basis of the signal supplied from the operation input acquisition unit 32, the menu screen button is clicked by the user. It is determined whether or not the content of the update has been selected.

  In step S4, the menu screen display control unit 31 stands by until it is determined that the content of the update has been selected. If it is determined that the content of the update has been selected, the process proceeds to step S5. Information representing the content of the update selected by the user is output from the menu screen display control unit 31 to the data acquisition unit 33.

  In step S5, the data acquisition unit 33 controls the Internet interface 24 to cause the server 3 to transmit information indicating the contents of the update, and requests download of the update file designated by the user.

  In step S6, the data acquisition unit 33 controls the Internet interface 24 to cause the server 3 to download a text subtitle file prepared as an update file, and notifies the local storage directory management unit 34 that the text subtitle file has been downloaded. Notice.

  In step S7, the data acquisition unit 33 controls the Internet interface 24 to cause the SubPlayItem representing the playback path of the text subtitle file downloaded in step S6 to download the PlayList added to the main PlayItem, and the PlayList is downloaded. To the local storage directory manager 34. For example, a text subtitle file for displaying Arabic subtitles is referred to by the SubPlayItem of the PlayList downloaded here.

  In step S8, the data acquisition unit 33 controls the Internet interface 24 to download the updated navigation program file, and notifies the local storage directory management unit 34 that the navigation program has been downloaded.

  In step S <b> 9, the local storage directory management unit 34 creates a directory identified by these IDs in the local storage 24 based on Studio_id and Content_id supplied from the optical disc directory management unit 35. Accordingly, for example, as shown in FIG. 7, a folder (directory) in which the name “xxx-yyy” is set as a directory corresponding to the optical disc 11 having “Studio_id of“ xxx ”and Content_id of“ yyy ”is local. Created in the storage 24.

  In step S10, the local storage directory manager 34 expands and stores each file downloaded from the server 3 in the directory created in step S9.

  Since the update file is downloaded from the server 3 by such processing, for example, a user who has purchased the optical disc 11 on which content such as a movie is recorded displays subtitles in a language that is not recorded in advance on the optical disc 11. You can get the files you need. Therefore, it is possible to view content by displaying subtitles in a language desired by the user.

  The downloaded update file is continuously stored in the local storage 24. When the same optical disc 11 is mounted again, the stored text subtitle file is used and the AV stream file is played back. For example, when a text subtitle file necessary for displaying Arabic subtitles has already been downloaded by the above-described processing, the user downloads the next time the movie content on the optical disc 11 is played back by the playback device 1. The Arabic subtitles can be displayed without causing the playback apparatus 1 to perform the above process again.

  The download of the update file as described above may be performed for a fee or may be performed for free.

  Further, when the user instructs to download a text subtitle file necessary for displaying subtitles in a plurality of languages from the menu screen, the text subtitle file necessary for displaying subtitles in each language is provided individually. Instead of this, the server 3 side may collect the text subtitle files as one text subtitle file, and the integrated text subtitle files may be provided. In this case, the save position of the text subtitle file of each language is specified by PlayList.

  Next, the reproduction process 1 of the controller 21 will be described with reference to the flowchart of FIG.

  In the state where the update file downloaded as described above is recorded in the local storage 24, when the reproduction of the content recorded on the optical disc 11 is instructed, in step S31, the optical disc directory management unit 35 11 reads Studio_id and Content_id, and outputs the read Studio_id and Content_id to the local storage directory management unit 34.

  In step S32, the local storage directory management unit 34 searches for the file system of the local storage 24 corresponding to the file system of the optical disc 11 based on the Studio_id and Content_id supplied from the optical disc directory management unit 35, and merges the file system. This is supplied to the processing unit 36. As described above, the file system corresponding to the file system of the optical disc 11 is stored in a directory in which a name including Studio_id and Content_id is set in the local storage 24 (FIG. 7).

  At this time, the file system of the optical disk 11 is output from the optical disk directory management unit 35 to the file system merge processing unit 36.

  In step S33, the file system merge processing unit 36 merges the file system of the optical disc 11 and the file system of the local storage 24 as described with reference to FIG. 7 and FIG. Generate the system. The generated first virtual file system is output to the playback control unit 37 and used for playback of the AV stream file.

  In step S34, the reproduction control unit 37 designates and executes a navigation program from the supplied first virtual file system. Therefore, as shown in FIG. 8, when the updated navigation program is in the first virtual file system, the navigation program (the navigation program recorded in the local storage 24) is executed.

  In step S35, the playback control unit 37 acquires the PlayList and SubPlayItem specified by the navigation program as playback sections, and proceeds to step S36 to control the local storage directory management unit 34 and the optical disc directory management unit 35 to acquire the acquired PlayList. And a file (AV file, text subtitle file, font file, etc.) referenced by SubPlayItem are read out and supplied to the decoder 26. Here, a time stamp represented by PlayList or SubPlayItem is converted into an address by Clip information, and an AV stream or the like is accessed.

  That is, the reproduction control unit 37 reads the AV stream file from the local storage 24 when the AV stream file referred to by the PlayList or SubPlayItem exists in the local storage 24, and reads the AV stream file from the optical disc 11 when it does not exist. .

  For example, when the playback control unit 37 controls the local storage directory management unit 34 and the optical disc directory management unit 35 according to the file system of FIG. 8 to read the AV stream, it is prepared in advance on the optical disc 11. The AV stream file set with the file name “01000.m2ts” and the AV stream file set with the file name “02000.m2ts” are read from the optical disc 11 and added by downloading. The AV stream file in which the file name “04000.m2ts” is set is read from the local storage 24.

  In step S37, content reproduction processing 1 described later with reference to FIG. 37 is executed, the read AV stream file, text subtitle stream file, and the like are decoded, and video, audio, or subtitles are output from the display device, and processing is performed. Is terminated.

  As described above, the first virtual file system is generated and used at the time of reproducing the content. For example, the data of the text subtitle file referred to by SubPlayItem is read and reproduced at the same time as the AV stream.

  Next, the content reproduction process 1 executed in step S37 in FIG. 36 will be described with reference to the flowchart in FIG.

  In step S61, the playback control unit 37 controls the decoder 26 to play back the AV stream data specified by PlayItem.

  In step S <b> 62, the operation input acquisition unit 32 determines whether or not an operation input commanding display of caption data has been received. If it is determined in step S62 that an operation input commanding subtitle data display has not been received, the process proceeds to step S68 described below.

  If it is determined in step S62 that an operation input commanding display of caption data has been received, the operation input acquisition unit 32 supplies a signal corresponding to the user operation input to the menu screen display control unit 31 in step S63. . The menu screen display control unit 31 displays a list menu of subtitle data that can be displayed on the display device.

  In step S64, the operation input acquisition unit 32 determines whether or not an operation input designating the language of the caption data to be displayed has been received. If it is determined in step S64 that an operation input specifying the language of the caption data to be displayed has not been received, the process returns to step S63, and the subsequent processes are repeated.

  If it is determined in step S64 that an operation input specifying the language of the caption data to be displayed is received, the operation input acquisition unit 32 supplies a signal corresponding to the user operation input to the reproduction control unit 37 in step S65. . The playback control unit 37 controls the local storage directory management unit 34 to read the text subtitle data referenced by the SubPlayItem specified based on the user's operation input, and supply the text subtitle data to the storage data acquisition unit 91 of the decoder 26. In addition, the font data corresponding to the font designated by the user is read out and supplied to the storage data acquisition unit 91 of the decoder 26 as necessary.

  In step S66, the decoder 26 executes caption display processing 1 described later with reference to FIGS. 38 and 39.

  In step S <b> 67, the operation input acquisition unit 32 determines whether or not an operation input that instructs to change the language of the caption data to be displayed has been received. If it is determined in step S67 that an operation input commanding the change of the language of the caption data to be displayed has been received, the process returns to step S65, and the subsequent processes are repeated.

  If it is determined in step S62 that no operation input commanding display of subtitle data has been received, or in step S67, it has been determined that no operation input commanding changing the language of the subtitle data to be displayed has been received. In this case, in step S68, the operation input acquisition unit 32 determines whether an operation input for instructing to end the reproduction of the content has been received or whether the AV stream data being reproduced has ended.

  If it is determined in step S68 that no operation input commanding the end of content playback has been received and the AV stream data being played back has not ended, the operation input acquisition unit 32 in step S69 determines It is determined whether or not an operation input for stopping the display has been received.

  If it is determined in step S69 that an operation input for stopping the display of subtitles has not been received, the process returns to step S66, and the subsequent processes are repeated. If it is determined in step S69 that an operation input for stopping the display of subtitles has been received, the process returns to step S61, and the subsequent processes are repeated.

  If it is determined in step S68 that an operation input commanding the end of content reproduction has been received or it is determined that the AV stream data being reproduced has been completed, the processing is terminated.

  Through such processing, text subtitle files that are recorded in advance on the optical disc 11 or downloaded from the server 3 and stored in the local storage 24 are used, and the subtitles in the language desired by the user are displayed as the content video. The text subtitle file to be read is changed in order to change the language of the displayed subtitle based on the user's operation input.

  Next, the caption display process 1 executed in step S66 of FIG. 37 will be described with reference to the flowcharts of FIGS.

  In step S91, the text data decoder 121 of the text subtitle processing unit 92 of the decoder 26 decodes the text subtitle data acquired by the storage data acquisition unit 91.

  In step S92, the text data decoder 121 of the text subtitle processing unit 92 supplies the character object included in the decoded text subtitle data to the character object buffer 122 of the text subtitle processing unit 92. The object is buffered.

  In step S93, the text data decoder 121 supplies the attribute data included in the decoded text subtitle data to the attribute data buffer 123 of the text subtitle processing unit 92, so that the attribute data is buffered in the attribute data buffer 123.

  In step S94, the control unit 81 determines whether or not a signal indicating an operation input for instructing to change a subtitle attribute such as a font size is received from the reproduction control unit 37 (controller 21).

  If it is determined in step S94 that a signal indicating an operation input for instructing to change the caption attribute is received, the control unit 81 changes the attribute data held in the attribute data buffer 123 in step S95. .

  If it is determined in step S94 that a signal indicating an operation input for instructing a change in subtitle attribute has not been received, or after the processing in step S95, the font of the text subtitle processing unit 92 is determined in step S96. The rasterizer 124 acquires a character object and attribute data from the character object buffer 122 and the attribute data buffer 123.

  In step S97, the control unit 81 determines whether or not a signal indicating an operation input for instructing the font type change is received from the reproduction control unit 37 (controller 21).

  If it is determined in step S97 that a signal indicating an operation input for instructing the font type change is received, the operation is performed by the processing of the local storage directory management unit 34 (controller 21) under the control of the reproduction control unit 37. Since different font data is read from the local storage 24 based on the input, the font rasterizer 124 of the text subtitle processing unit 92 acquires different font data based on the operation input in step S98.

  In step S97, when it is determined that the signal indicating the operation input for instructing the change of the font type is not received, or after the process of step S98 is finished, in step S99, the font rasterizer 124 in step S96. With reference to the acquired attribute and bookmark buffer 125, it is determined whether or not the caption data to be rasterized is the caption data that has been bookmarked and already buffered in the bookmark buffer 125.

  If it is determined that the subtitle data is bookmarked and buffered in step S99, the font rasterizer 124 saves the subtitle image data (raster data) to be bookmarked from the bookmark buffer 125 in step S100. Is output and the process proceeds to step S104.

  If it is determined in step S99 that the subtitle data is not already bookmarked, in step S101, the font rasterizer 124 performs rasterization based on the acquired character object and attribute data to perform subtitle graphics plane processing. To the unit 93. The subtitle graphics plane processing unit 93 generates a subtitle graphics plane based on the supplied raster data and supplies the subtitle graphics plane to the synthesis processing unit 94.

  In step S102, the font rasterizer 124 determines whether or not a new bookmark is described in the attribute data based on the attribute data of the caption data rasterized in step S101.

  If it is determined in step S102 that a bookmark is described, the font rasterizer 124 stores the rasterized subtitle image data in the bookmark buffer 125 in step S103.

  If it is determined in step S102 that no bookmark is described after the processing in step S100, or after the processing in step S103, the composition processing unit 94 supplies the subtitle image data supplied in step S104. Is combined with the video data and output, and the process proceeds to step S67 of FIG.

  By such processing, reading of text subtitle file and font file data is controlled so that subtitle data in the language desired by the user is displayed in the font desired by the user with the attribute desired by the user, If necessary, the buffered attribute data is changed and rasterized.

  By the way, in the playback apparatus to which the present disclosure is applied, in addition to the above-described case, the content recorded on the optical disc and the content recorded on the local storage are played back in association with each other by the following method. Can do. Hereinafter, a second embodiment for reproducing the content recorded on the optical disc and the content recorded on the local storage in association with each other will be described.

  FIG. 40 is a block diagram illustrating a configuration example of the playback device 181 according to the second embodiment to which the present disclosure is applied.

  In the playback apparatus 181 in FIG. 40, the same reference numerals are given to the portions corresponding to those in the playback apparatus 1 described with reference to FIG. 1, and description thereof will be omitted as appropriate. That is, the playback apparatus 181 in FIG. 40 basically has the playback described with reference to FIG. 1 except that the controller 191 is provided instead of the controller 21 and the decoder 192 is provided instead of the decoder 26. It has the same configuration as the device 1. Also, the playback device 181 reads data recorded on an optical disk 193 having a file structure, which will be described later with reference to FIG. 42, and decodes and plays back the AV stream or text data.

  The controller 191 executes a control program prepared in advance to control the overall operation of the playback device 181, or controls the optical disc drive 22 and includes a plurality of commands recorded on the optical disc 193. The read-out MovieObject (movie object: details will be described later) is read out and expanded in the memory 23 to execute the command, thereby controlling the reproduction operation of the data stored in the optical disc 11 and the local storage 24. For example, the controller 191 can display a predetermined menu screen on an external display device when the optical disc 193 is loaded.

  The decoder 192 decodes the AV stream or text data supplied from the optical disc drive 22 or the local storage 24 based on the control of the controller 191, and outputs the obtained video signal and audio signal to an external display device. Output. In the display device, based on the signal decoded by the decoder 192, for example, output of content recorded on the optical disc 193 (video display, audio output) is performed.

  FIG. 41 is a block diagram illustrating a functional configuration example of the controller 191 in FIG.

  Each configuration of FIG. 41 is realized by executing a control program prepared in advance by the controller 191 or by executing a command constituting the MovieObject recorded on the optical disc 193 by the controller 191. .

  In the functional configuration diagram shown in FIG. 41, portions corresponding to those described with reference to FIG. 6 are denoted with the same reference numerals, and description thereof will be omitted as appropriate. That is, the functional configuration of the controller 191 shown in FIG. 41 is provided with a local storage directory management unit 201 in place of the local storage directory management unit 34 and an optical disc directory management unit 202 in place of the optical disc directory management unit 35. The controller described with reference to FIG. 6 except that a file system merge processing unit 203 is provided in place of the file system merge processing unit 36 and a reproduction control unit 204 is provided in place of the reproduction control unit 37. This is basically the same as 21 functional configurations.

  The local storage directory management unit 201 manages a directory of the local storage 24 and controls data writing to the local storage 24 and data reading from the local storage 24. For example, the PlayList read from the local storage 24 under the control of the local storage directory management unit 201 is output to the memory 23 and the audio data and video data of the AV stream read from the local storage 24 and the text of the text subtitle file The data is output to the decoder 192. Further, as will be described later, the local storage directory management unit 201 merges the file system of the optical disc 193 and the file system of the local storage 24 by the file system merge processing unit 203, and the second virtual file described later. When the system is generated, information related to the file system in the local storage 24 is output to the file system merge processing unit 203.

  In addition, the local storage directory management unit 201 acquires and updates the update file designated by the user from the server 3 by the data acquisition unit 33, and the acquired update file is an update file corresponding to an already existing PlayList. In this case, the update procedure of data already recorded in the local storage 24 is executed with reference to the acquired update file.

  The optical disc directory management unit 202 manages a directory of the optical disc 193 and controls reading of each data from the optical disc 193. On the optical disc 193, author_id (or Studio_id in the first embodiment) and disc_id (or Content_id in the first embodiment), which are secure identification information that cannot be rewritten by the user or the like, are electronic. The author_id and the disc_id read from the optical disc 193 are output to the local storage directory management unit 201 under the control of the optical disc directory management unit 202. Also, the PlayList read from the optical disc 193 is output to the memory 23 under the control of the optical disc directory management unit 202, and the audio data and video data of the AV stream and text data of the text subtitle file read from the optical disc 193 are , Output to the decoder 192. Further, as will be described later, the optical disk directory management unit 202 merges the file system of the optical disk 193 and the file system of the local storage 24 by the file system merge processing unit 203, so that a second virtual file system described later is obtained. Is generated, information about the file system of the optical disc 193 is output to the file system merge processing unit 203.

  The file system merge processing unit 203 merges the file system of the optical disk 193 supplied from the optical disk directory management unit 202 and the file system of the local storage 24 supplied from the local storage directory management unit 201 to create one virtual file. Generate the system. The file system merge processing unit 203 outputs a virtual file system generated by merging two file systems to the reproduction control unit 204. Hereinafter, in the second embodiment, a virtual file system generated by the file system merge processing unit 203 is referred to as a second virtual file system.

  The playback control unit 204 controls the playback of content by executing a command included in the MovieObject specified by the second virtual file system supplied from the file system merge processing unit 203. Specifically, the playback control unit 204 is supplied to the memory 23, refers to the stored PlayList, controls the local storage directory management unit 201 or the optical disc directory management unit 202, and is recorded on the optical disc 193 or the local storage 24. Audio data, video data, and text data of a text subtitle file as necessary are read out, and the decoder 192 in FIG. 40 is controlled to record the AV recorded in the optical disc 193 or the local storage 24. Stream audio data, video data, and, if necessary, text data of a text subtitle file are decoded (reproduced).

  Also in the second embodiment, an example of the application format of the optical disc 193 mounted on the playback device 181 to which the present disclosure is applied is the PlayListLayer and ClipLayer, and the optical disc 11 described with reference to FIGS. Since this is basically the same as that in FIG.

  Also in the second embodiment, the playback device 181 to which the present disclosure is applied can play back the content recorded on the optical disc 193 and the content recorded on the local storage 24 in association with each other. The same operational effects as in the case of the first embodiment are obtained. Therefore, for example, the Clip1 AV stream recorded on the optical disc 193 and referred to by the PlayList PlayItem is a stream for displaying the video of the movie content and reproducing the corresponding audio, and is referred to by the PlayList SubPlayItem. When the subtitle related information 1 of Clip2 is a text subtitle file for displaying English subtitles in conjunction with the display of the video, the user selects a desired one corresponding to the movie recorded on the optical disc 193 on the playback device 181. A language text subtitle file is downloaded from the server 3 via the network 2 (or obtained using the removable media 28), and the content recorded on the optical disc 193 and the content recorded on the local storage 24 are associated with each other and reproduced. can do.

  That is, when the user instructs the download of the text subtitle file in Arabic corresponding to the PlayList recorded in advance on the optical disc 193, the playback device 181 accesses the server 3 via the network 2. In order to update the content recorded on the optical disc 193, a file prepared in the server 3 is downloaded. The playback apparatus 181 can associate the content recorded on the optical disc 193 with the content recorded on the local storage 24, and can play back the clip AV stream and the text subtitle stream in synchronization.

  FIG. 42 is a diagram showing an example of a file system of the optical disc 193. As shown in FIG. As shown in FIG. 42, the file system of the optical disc 193 has a directory structure.

  A directory in which the name “BDMV” is set is prepared under “root” of the optical disc 193, and a file in which the name “Index.bdmv” is set and a name “MovieObject.bdmv” are included in the directory. The set file is stored. Hereinafter, these files will be referred to as an Index file and a MovieObject file, respectively, as appropriate. As appropriate, each file is referred to by adding “file” to “file name”, or each directory is referred to by adding “directory” to “directory name”.

  The Index file includes information regarding a menu for playing the optical disc 193. The playback device 181 displays, for example, a playback menu screen including items such as playback of all the contents of the optical disc 193, playback of only a specific chapter, repeated playback, and display of an initial menu based on the Index file. Display on the device. A MovieObject to be executed when each item is selected can be set in the Index file. When one item is selected from the playback menu screen by the user, the playback device 181 sets the MovieObject set in the Index file. Execute a command.

  The MovieObject file is a file including MovieObject. The MovieObject includes a command for controlling the playback of the PlayList recorded on the optical disc 193. For example, the playback device 181 selects and executes one of the MovieObjects recorded on the optical disc 193. The content recorded on the optical disc 193 can be reproduced.

  The BDMV directory also includes a directory with the name “BACKUP” (BACKUP directory), a directory with the name “PLAYLIST” (PLAYLIST directory), and a directory with the name “CLIPINF” (CLIPINF directory). , A directory (STREAM directory) in which the name “STREAM” is set, and a directory (AUXDATA directory) in which the name “AUXDATA” is set.

  In the BACKUP directory, files and data for backing up files and data recorded on the optical disk 193 are recorded.

  A PlayList file is stored in the PLAYLIST directory. As shown in the figure, each PlayList file is given a name obtained by adding an extension “.mpls” to a file name consisting of a 5-digit number.

  A Clip Information file is stored in the CLIPINF directory. Each Clip Information file is named by adding the extension “.clpi” to a file name consisting of five digits as shown in the figure.

  In the STREAM directory, a Clip AV stream file and a substream file are stored. Each stream file is given a name obtained by adding an extension “.m2ts” to a file name consisting of five digits as shown in the figure.

  In the AUXDATA directory, data that is not included in the Clip AV stream file or substream file, but is referenced from the Clip AV stream file or substream file, or data that is used independently of the Clip AV stream file or substream file And other files are stored. In the example of FIG. 42, the AUXDATA directory stores a subtitle font file named “11111.otf” and a sound effect file named “sound.bdmv”. .

  Also, the optical disc 193 has an author_id (or the first implementation) that is an identifier assigned to each title author in order to identify the title author who is the content producer of the optical disc 193, such as a production company or a movie distributor. Disc_id (or Content_id in the first embodiment) assigned to identify the type of the optical disc 193 manufactured in the title author indicated by author_id and Studio_id in the form is determined by the user or the like It is recorded as secure electronic data that cannot be rewritten or physically by pits.

  In the second embodiment of the present disclosure, a text subtitle file storing subtitle data and a font file necessary for rendering, a PlayList file defining SubPath and SubPlayItem, and a Clip Information file are included. As a result of a new download, synchronization between the Clip AV stream and the text subtitles is realized. As shown in FIG. 43, the set of archive files to be downloaded includes a PlayList file, a Clip Information file, a text subtitle stream file, and a font file as essential.

  Next, FIG. 44 shows an archive of data to be additionally distributed in the second embodiment of the present disclosure.

  As shown in FIG. 44, the archive file newly distributed to the user has a structure to which metadata is added for the file addition or update procedure in the playback apparatus 181.

  The compression_type 8-bit field specifies the data compression method in FileArchive (). If 0 is specified in the 8 bits of compression_type, the data in FileArchive () is assumed to be in an uncompressed format. The 8-bit field of encryption_type specifies the scramble method (encryption method) of the data in FileArchive (). When 0 is specified in the 8-bit field of encryption_type, the data in FileArchive () is assumed to be in a non-scrambled format (plain text format). Note that the order of the scramble and compression of the data in FileArchive () is such that the compression process is performed first and then the scramble process is performed.

  The 8 × 5-bit field of PlayList_file_name specifies the file name of the subsequent PlayList file. The file name encoding method conforms to the ISO / IEC646 standard. The 32-bit field of PlayList_file_size specifies the size of the next PlayList file in bytes. 0 must not be specified in the PlayList_file_size field.

  PlayList_file stores the PlayList file as a byte sequence.

  A 16-bit field of number_of_Files specifies the total number of files. Do not specify 0 in the number_of_Files field. Also, the total number of files specified in the number_of_Files field must match the total number of SubClip_entry defined in the SubPlayItem in the immediately preceding PlayList_file.

  The metadata includes author_id, disc_id, title_id, version, operation_type, display_name, and permission.

  The author_id is an 8-bit field that specifies an identifier for specifying the title author. The title_id is an 8-bit field that specifies an identifier for specifying a title. disc_id is an 8-bit field for designating an identifier for identifying a disc. version is an 8-bit field that specifies version information for managing the history of files in the archive.

  The operation_type is an 8-bit field that specifies a method for updating an in-archive file. A value that can be specified for operation_type and a specific example of the file update method will be described later.

  display_name is an 8 × 128-bit field for designating a name displayed on the GUI corresponding to this file. The controller 191 described with reference to FIG. 1 can display a predetermined menu screen on an external display device. For example, when a predetermined menu screen is displayed on an external display device in order to cause the user to perform an operation of selecting a file, the file name defined in the archive is displayed on the menu screen. Since the contents of the file cannot be specified, it is difficult to select a desired file. Therefore, in the display_name field, information indicating a name that allows the user to easily specify the contents of the file to be displayed on the menu screen is described. The encoding method of the data stored in the display_name field shall conform to the ISO / IEC 10646-1 standard.

  permission indicates the attribute of the file accompanied by this metadata. Specifically, permission / permission information such as whether the corresponding file may be made visible or invisible to the user. Is an 8-bit field. The values that can be specified for permission will be described later.

  Further, clip_information_file_name is an 8 × 5 bit field that specifies the file name of the subsequent Clip Information file. The encoding method of the file name described in clip_information_file_name follows the ISO / IEC646 standard.

  clip_information_file_size is a 32-bit field that specifies the size in bytes of the subsequent Clip Information file. 0 must not be specified in the clip_information_file_size field.

  clip_information_file stores a Clip Information file as a byte sequence.

  text_subtitle_file_name is an 8 × 5 bit field that specifies the file name of the text subtitle stream file that follows. The encoding method of the file name described in text_subtitle_file_name follows the ISO / IEC646 standard.

  text_subtitle_file_size is a 32-bit field that specifies the size in bytes of the subsequent text subtitle stream file. Do not specify 0 in the text_subtitle_file_size field.

  text_subtitle_file stores a text subtitle stream file as a byte sequence. The syntax of subtitle_file in which the text subtitle stream is stored will be described later with reference to FIG. The structure of the container file in which the text subtitle stream is stored will be described later with reference to FIG.

  font_file_name is an 8 × 5 bit field that specifies the file name of the font file that follows. The encoding method of the file name described in font_file_name follows the ISO / IEC646 standard.

  font_file_size is a 32-bit field that specifies the size of the next font file in bytes. 0 must not be specified in the font_file_size field.

  font_file stores the font file as a byte sequence.

  The PlayList included in the data of the update file added and distributed includes MainPath and SubPath. FIG. 45 shows the data structure of SubPath. First, the data structure of the highest layer of the SubPath shown on the left side of FIG. 45 will be described.

  SubPath_type indicates the application type of SubPath. SubPath_type is used, for example, when the type indicates whether the Sub Path is audio, bitmap subtitle, text subtitle, or the like. is_repeat_SubPath indicates a SubPath playback method, and indicates whether Sub Path playback is repeated during MainPath playback, or SubPath playback is performed only once. number_of_SubPlayItems indicates the number of SubPlayItems (number of entries) included in the SubPath. Thereafter, the number of SubPlayItems included in number_of_SubPlayItems is included.

  Next, the data structure of SubPlayItem shown in the center of FIG. 45 will be described.

  Clip_Information_file_name indicates the file name of the Clip Information file included in the sub Clip referred to by SubPlayItem. Clip_codec_identifier indicates the codec method of the sub clip referred to by SubPlayItem. is_multi_Clip_entries is a flag indicating whether or not this SubPlayItem refers to a plurality of sub Clips. ref_to_STC_id indicates information related to STC (System Time Clock) discontinuous points (system time base discontinuous points).

  SubPlayItem_IN_time and SubPlayItem_OUT_time indicate the playback section of the substream included in the sub Clip referred to by SubPlayItem. sync_PlayItem_id and sync_start_PTS_of_PlayItem are used to specify the time at which the SubPlayItem starts playback on the time axis of the Main Path. Specifically, the playback of this SubPlayItem is started at the time specified by sync_start_PTS_of_PlayItem on the time axis of the PlayItem having the same PlayItem_id as the value of sync_PlayItem_id.

  number_of_Clip_entries indicates the number of sub clips referenced by the SubPlayItem. Thereafter, as many SubClip_entrys as indicated by number_of_Clip_entries are included.

  Next, the data structure of SubClip_entry shown on the right side of FIG. 45 will be described.

  Clip_Information_file_name indicates the file name of the Clip Information file included in the sub Clip referred to by SubPlayItem. Clip_codec_identifier indicates the codec method of the sub clip referred to by SubPlayItem. ref_to_STC_id indicates information related to STC discontinuous points (system time base discontinuous points).

  Next, FIG. 46 shows a list of values that can be specified for operation_type included in the metadata of FIG.

  As shown in FIG. 46, when 0x01 is described in the 8-bit field of operation_type, the update method of the file in the archive is PlayList exchange. That is, when an update file in which 0x01 is written in the 8-bit field of operation_type is downloaded, in the second virtual file system created by merging using this update file, it is downloaded and is stored in the local storage. 24 is referred to as it is, and the PlayList on the optical disc 193 is not referred to at all.

  In addition, when 0x02 is described in the 8-bit field of operation_type, the SubPath element is extracted from the downloaded file, and the extracted SubPath element is added to the SubPath element recorded on the optical disc 193. The file system is merged and updated (a second virtual file system is generated).

  For example, 0x02 is described in the 8-bit field of operation_type, and as shown in FIG. 47, the optical disc 193 includes a PlayList # 1 file including SubPath # 1, a ClipAV stream # 1 file, and, for example, sub audio. When the corresponding Audio stream # 1 file is recorded and the content package downloaded from the server 3 includes the PlayList # 1 file having the SubPath # 2 and the text subtitle stream # 1 file, The SubPath # 2 of the PlayList # 1 file is extracted, and the file system is updated such that the extracted SubPath # 2 is added to the update source PlayList # 1 file read from the optical disc 193.

  That is, as shown in FIG. 48, in the PlayList before update, ie, the PlayList of the optical disc 193, which has MainPath composed of PlayItems and SubPath composed of SubPlayItems, ClipAV stream # 1 referred to by PlayItem, and The Audio stream # 1, which is sub-audio data that is reproduced in synchronization with the Clip AV stream 1 with reference to the SubPlayItem, is reproduced. In the PlayList after updating the content recorded on the optical disc 193 (that is, after the file system is merged and updated), the content is played back in synchronization with the ClipAV stream # 1 and independently. Since the second SubPlayItem for which the playback section can be set is added to the Sub Path, the ClipAV stream # 1 referred to by the PlayItem and the first SubPlayItem are referenced and played back in synchronization with the ClipAV stream # 1. In addition to the reproduction of the audio stream # 1 that is sub-audio data, the text subtitle stream # 1 in which the reproduction section can be set independently of the audio stream # 1 can be reproduced.

  In addition, when 0x03 is described in the 8-bit field of operation_type, the SubPlayItem element is extracted from the downloaded file, and the extracted SubPlayItem element is added to the SubPlayItem element recorded on the optical disc 193. The file system is merged and updated (a second virtual file system is generated).

  For example, 0x03 is described in the 8-bit field of operation_type, and as shown in FIG. 49, the optical disc 193 includes a PlayList # 1 file including SubPath # 1 composed of SubPlayItem # 1, a ClipAV stream # 1 file, And, for example, an Audio stream # 1 file corresponding to sub audio is recorded, and the content package downloaded from the server 3 includes a PlayList # 1 file having SubPath # 1 composed of SubPlayItem # 2 and a text subtitle stream. When # 2 file is included, SubPlayItem # 2 constituting SubPath # 1 of PlayList # 1 file in the content package is extracted, and the extracted SubPlayItem # 2 is the update source read from the optical disc 193 The file system is updated to be added to SubPath # 1 of the PlayList # 1 file.

  That is, as shown in FIG. 50, in the pre-update PlayList having a MainPath composed of PlayItems and a Sub Path composed of SubPlayItem # 1 (described as SPI1 in the figure), the ClipAV stream referred to by the PlayItems Audio stream # 1, which is sub-audio data reproduced in a predetermined first section, is reproduced by referring to # 1 and SubPlayItem # 1 in synchronization with ClipAV stream # 1. In the PlayList after the content recorded on the optical disc 193 is updated (that is, after the file system is merged and updated), the ClipAV stream # 1 and SubPlayItem # 1 referenced by the PlayItem are referenced. In addition, the audio stream # 1 that is the reproduced sub-audio data that is reproduced in the predetermined first section in synchronization with the ClipAV stream 1 is reproduced, and is included in the same SubPath as SubPlayItem # 1. Since SubPlayItem # 2 (described as SPI2 in the figure) is added, the text subtitle stream # 1 can be reproduced in a predetermined second section in synchronization with the ClipAV stream # 1.

  Then, when 0x04 is written in the 8-bit field of operation_type, the SubClip_entry element is extracted from the downloaded file, and the extracted SubClip_entry element is added to the SubClip_entry element recorded on the optical disc 193. The file system is merged and updated (a second virtual file system is generated).

  For example, 0x04 is described in the 8-bit field of operation_type, and as shown in FIG. 51, the PlayList # including SubPath # 1 composed of SubPlayItem # 1 associated with Clip # 1 on the optical disc 193 is shown. One file, a ClipAV stream # 1 file, and a text subtitle stream # 1 file corresponding to a subtitle in the first language, for example, are recorded, and Clip # 2 is associated with the content package downloaded from the server 3. When a PlayList # 1 file having SubPath # 1 composed of SubPlayItem # 1 and a text subtitle stream # 2 file corresponding to a subtitle in the second language is included, the PlayList # 1 file in the content package Update source from which Clip # 2 of SubPlayItem # 1 constituting SubPath # 1 is extracted and the extracted Clip # 2 is read from the optical disc 193 PlayList # 1 file SubPlayItem # filesystem added state 1 constituting the SubPath # 1 of is updated.

  That is, as shown in FIG. 52, in the pre-update PlayList having MainPath composed of PlayItems and SubPath composed of SubPlayItems, ClipAV stream # 1 and SubPlayItem # 1 referred to by PlayItem are referred to. The text subtitle stream # 1 corresponding to the subtitle in the first language is played back in synchronization with the ClipAV stream # 1. In the PlayList after updating the content recorded on the optical disc 193 (that is, after the file system is merged and updated), the ClipAV stream # 1 and SubPlayItem referred to by the PlayItem refer to Since the text subtitle stream # 1 corresponding to the subtitle of the first language that is played back in synchronization with the ClipAV stream # 1 is played back, Clip # 2 is further added to the SubPlayItem constituting the SubPath. In synchronization with ClipAV stream # 1, text subtitle stream # 2 corresponding to the second language referred to by SubPlayItem can be further reproduced.

  FIG. 53 shows a list of values that can be specified for the permissions included in the metadata of FIG.

  As shown in FIG. 53, when 0x00 is described in the 8-bit field of permission, the attribute of the file accompanying this metadata is an invisible attribute to the user, and the 8-bit permission is set. When 0x01 is described in the field of, the attribute of the file accompanied by this metadata is a visible attribute to the user, and when 0x03 is described in the 8-bit field of permission, The attribute of the file accompanying this metadata is an overwrite prohibition attribute.

  As described with reference to FIG. 44, the text subtitle stream file is stored as a byte sequence in the subtitle_file field. The text subtitle file is assumed to follow the syntax shown in FIG.

  Basically, the syntax of the text subtitle file in the second embodiment is basically the same as that in the second embodiment described with reference to FIG. 12, but is shown in FIG. The syntax of the text subtitle file in the second embodiment is compared with the case described with reference to FIG. 12, the version (version) information included in the metadata is omitted, and before start_PTS and end_PTS, The subtitle_data, which is information specifying subtitle data, is divided by 8 padding bits (reserved) for adjusting the data boundary, and is stored in a byte sequence.

  That is, markup_type is 8-bit information that specifies the markup format. subtitle_count is 32-bit information that specifies the total number of subtitle data. (Subtitle_count is not the total number of line feed codes.) Reserved is an 8-bit padding bit for adjusting the data boundary. start_PTS is 33-bit information that specifies the display start time of subtitle data by PTS (Presentation Time Stamp) on the time axis where the start time of PlayList is 0. The end_PTS is 33-bit information that specifies the display end time of the caption data by the PTS on the time axis where the start time of the PlayList is 0. For PTS, the value measured at 90 kHz is used. In start_PTS and end_PTS, a value measured at 90 kHz is used for PTS.

  subtitle_data_length is 32-bit information that specifies the number of bytes of subtitle_data (not the number of subtitle characters). subtitle_data is information specifying subtitle data, and is stored as a byte sequence.

  Also in the second embodiment, the caption data is composed of “character object” and “attribute data (attribute)” indicating the characters themselves constituting the caption, and the attribute data of the caption data is based on the control character. There are two attribute setting methods: attribute setting and inline attribute setting by markup.

  The attribute setting by the control character is the same as that described with reference to FIGS. In addition, in the inline attribute setting by markup, there are two markup formats: markup with TLV (Type-Length-Value) encoding format and markup with tagged language elements and attributes. As in the case described with reference to FIG. 15, when the markup format identifier is 0x00, the markup format is defined as the TLV encoding format, and when the markup format identifier is 0x01, The markup format is defined to be a tagged language.

  First, a case where attribute designation by the TLV encoding method is performed will be described. In the case of attribute specification by the TLV encoding method, the character encoding method of subtitle data is based on the specification of character_code_id in SubPlayItem described with reference to FIG.

  The data structure of subtitle_data () in the case of attribute designation by the TLV encoding method will be described using FIG.

  The 8-bit field of escape_code designates an escape code 0x1B indicating that an attribute is described later, as described with reference to FIG. The 8-bit field of data_type specifies the attribute type. The 16-bit field of data_value_length specifies the number of bytes of attribute data that follows. data_value specifies attribute data or a byte sequence of a character object.

  FIG. 56 shows attributes that can be specified as data_type.

  When 0x01 is described in the 8-bit field of data_type of subtitle_data (), the type of attribute described is a setting of a subtitle character string that specifies a character string used as subtitle data. The caption data must be encoded by the encoding method specified by the character_code_id field in SubPlayItem ().

  When 0x02 is described in the 8-bit field of data_type of subtitle_data (), the attribute type described is the setting of CLUT (Color Look Up Table), which is a conversion table between index data and representative color data. is there. CLUT is a conversion table stored in a caption graphics plane processing unit 93 to be described later with reference to FIG. The data structure of data_value when the attribute type described in data_type of subtitle_data () is CLUT setting is the same as that described with reference to FIG. When 0x03 is described in the 8-bit field of data_type of subtitle_data (), the type of attribute described is designation of the region origin. In data_type of subtitle_data (), the data structure of data_value when the attribute type described is the region origin designation is the same as that described with reference to FIG. When 0x04 is described in the 8-bit field of data_type of subtitle_data (), the type of attribute described is designation of line space.

  When 0x05 is described in the 8-bit field of data_type of subtitle_data (), the type of attribute described is designation of the rendering direction. In the data_type of subtitle_data (), when the described attribute type is rendering direction designation, the code described in data_value is the same as that described with reference to FIG. When 0x06 is described in the 8-bit field of data_type of subtitle_data (), the type of attribute described is the designation of font color. The default may be “0”. When 0x07 is described in the 8-bit field of data_type of subtitle_data (), the type of attribute described is designation of the background color. The area filled with the specified background color is in units of regions. The default may be unspecified (transparent).

  When 0x08 is described in the 8-bit field of data_type of subtitle_data (), the type of attribute described is specification of a font style. In the data_type of subtitle_data (), when the described attribute type is a font style specification, one of the codes described with reference to FIG. 22 is described in the data_value, and the font style is specified. The The default font style may be “standard”. When 0x09 is described in the 8-bit field of data_type of subtitle_data (), the type of attribute described is specification of font size. In data_type of subtitle_data (), when the described attribute type is a font size specification, a value of 8 to 72 indicating the font size is specified in data_value. The default value for specifying the font size may be “32”. When 0x0A is described in the 8-bit field of data_type of subtitle_data (), the type of attribute described is designation of font rotation angle. In the data_type of subtitle_data (), when the described attribute type is a font rotation angle, a value between 0 and 360 corresponding to the font rotation angle is specified for data_value. Note that the rotation direction may be, for example, a positive direction counterclockwise, and the default may be “0”.

  When 0x0B is described in the 8-bit field of data_type of subtitle_data (), the type of attribute described is the bookmark start position. The bookmark is information given in advance by the supplier of the text subtitle file so that the rendering process can be omitted when the same character is displayed in the same format a plurality of times. In data_type of subtitle_data (), the data structure of data_value when the described attribute type is bookmark start position designation is the same as that described with reference to FIG. When 0x0C is described in the 8-bit field of data_type of subtitle_data (), the type of attribute described is the bookmark end position. In data_type of subtitle_data (), the data structure of data_value when the described attribute type is bookmark end position designation is the same as that described with reference to FIG. When 0x0D is described in the 8-bit field of data_type of subtitle_data (), the type of the attribute described is designation of repetition of the character object sequence to which the bookmark is attached. In data_type of subtitle_data (), the data structure of data_value when the described attribute type is a character object sequence repetition designation is the same as that described with reference to FIG.

  Next, the case of attribute specification in a tagged language will be described. In the case of attribute specification in a tagged language, the character encoding method of subtitle data is assumed to be ISO / IEC646 encoding ignoring the specification of character_code_id in SubPlayItem. The data structure of subtitle_data () in the case of attribute designation in a tagged language is the same as that described with reference to FIG. 26, and TaggedAttr follows a predetermined format as described with reference to FIG. char_data specifies the byte sequence of the character object. However, the byte sequence is ISO / IEC646 encoded by the BASE64 encoding method. At that time, “<” and “>” are escaped by “0x1B”.

  Next, with reference to FIG. 57, description will be given of elements and attribute types for attribute designation in a tagged language.

  The CLUT setting is described as <CLUT size = y = cb = cr = t =>, the size of the CLUT is specified in the attribute “size”, and the attributes “y”, “cb”, “cr” and “t” Indicates a CLUT index string in the caption graphics plane processing unit 93 to be described later with reference to FIG.

  The region origin designation is described as <region x = y =>, and the origin coordinates (x, y) of the region are designated in the attributes “x” and “y”.

  The line space designation is described as <linespace d =>, and the line spacing is designated in the attribute “d” in units of pixels. Note that the default between lines may be “font height”.

  The rendering direction designation is described as <textflow d =>, and the direction for drawing the character object is designated in the attribute “d”. The default rendering direction may be “from left to right”.

  The start of font color designation is described as <fontcolor c =>, and an index for CLUT in the subtitle graphics plane processing unit 93 to be described later with reference to FIG. 63 is designated in the attribute “c”. The default index corresponding to the font color may be “0”. The end of the font color designation is written as </ fontcolor>.

  The background color designation is described as <backgroundcolor c =>, and an index for the CLUT in the caption graphics plane processing unit 93 to be described later with reference to FIG. 63 is designated in the attribute “c”. However, the area filled with the background color may be in units of regions, and the default background color may be unspecified (transparent).

  The font style specification is described as <fontstyle s =>, and a font style such as bold, italic, or standard is specified in the attribute “s”. The default font style may be “standard”. The end of the font style designation is described as </ fontstyle>.

  The font size designation is described as <fontsize s =>, and a value of 8 to 72 corresponding to the font size is designated in the attribute “s”. The default value for specifying the font size may be “32”. The end of the font size designation is described as </ fontsize>.

  The font rotation angle designation is described as <fontrotate a =>, and a value between 0 and 360 corresponding to the rotation angle of the font is designated in the attribute “a”. The rotation direction may be counterclockwise as a positive direction, and the default value corresponding to the rotation angle of the font may be “0”. The end of the font rotation angle designation is described as </ fontrotate>.

  The bookmark designation is described as <mark id =>, and a value of 0 or more and 255 or less that can distinguish the bookmark individually is designated in the attribute “id”. As a result, a bookmark is assigned to the caption data within the scope of this element. Up to 256 bookmarks can be specified. The end of the subtitle text to which the bookmark is added is described as </ mark>.

  The character object sequence repeat specification is described as <repeat id = c =>, the attribute “id” is a value from 0 to 255 that can distinguish the bookmark individually, and the attribute “c” is the repeat count. The Thereby, the caption data provided with the bookmark corresponding to the attribute value set by the attribute “id” is repeated the number of times set in the attribute “c”.

  The text data of the text subtitle file in which the attribute is specified by the above-described method is designated with the rendering direction from left to right based on the setting of each attribute, for example, as described with reference to FIG. At the set line feed position, it is displayed with a line break downward, or as described with reference to FIG. 30, the rendering direction is designated from right to left, and at the set line feed position, the line is broken down downward and displayed. Or, as described with reference to FIG. 31, the rendering direction is designated from top to bottom, and the line is displayed in the left direction at the set line feed position.

  Also, for example, when specifying fade-in or fade-out for a displayed subtitle, the T-value of CLUT in the subtitle graphics plane processing unit 93 described later with reference to FIG. 63 is changed to change the transparency of the character. The character object sequence may be repeatedly specified while doing so.

  Next, a container file that stores a text subtitle stream will be described.

  Assume that the container file in which the text subtitle stream is stored is in another file format that is not multiplexed with the Clip AV stream. The container file format is assumed to be a BDAV MPEG-2 transport stream. A PES (Packetized Elementary Stream) packet in which the text subtitle stream is stored follows the Private Stream 2 format shown in FIG.

  In FIG. 58, packet_start_code_prefix is a 24-bit field that is a packet start code for identifying the start of a packet, and a value of 0x000001 is set. The stream_id is an 8-bit field that defines the type and number of the stream, and the value 0xBF is set. PES_packet_length is a 16-bit field that specifies the number of bytes of the byte sequence immediately following. PES_packet_data_byte specifies a text subtitle stream file as a byte sequence.

  Further, in the container file in which the text subtitle stream is stored, the PAT packet, the PMT packet, and the SIT packet each appear only once at the beginning of the Aligned Unit, and the PCR (Program Clock Reference reference time) Information) It is made not to have a packet.

  Therefore, the BDAV MPEG-2 transport stream in which the text subtitle stream is stored has a configuration as shown in FIG. 59, for example.

  In the BDAV MPEG-2 transport stream in which the text subtitle stream shown in FIG. 59 is stored, in each Aligned Unit, source packet # 1 includes a PAT packet, source packet # 2 includes a PMT packet, Source packet # 3 includes an SIT packet, and source packet # 4 to source packet # 32 are packets # 1 to # 29 in which a text subtitle stream file is stored in the Private Stream 2 format described with reference to FIG. It is supposed to be included.

  As described above, in the second embodiment, the update data described above is acquired by being downloaded from the server 3 and recorded in the local storage 24. FIG. 60 shows the data structure of data stored in the local storage 24.

  When there is no author_id directory for recording the processing target update data file directly under the root directory of the local storage 24, an author_id directory having the same name as the author_id of the processing target update file is created immediately under the root directory of the local storage 24. Then, a disc_id directory having the same name as the disc_id of the processing target update file is created under the author_id directory.

  Then, under the created disc_id directory, a BACKUP directory, a PLAYLIST directory, a CLIPINF directory, a STREAM directory, and an AUXDATA directory are created in the same manner as the hierarchy below the BDMV directory of the optical disc 193 described with reference to FIG. A PlayList file is stored in the directory, a ClipInformation file is stored in the CLIPINF directory, a text subtitle stream file is stored in the STREAM directory, and a font file is stored in the AUXDATA directory. In the example of FIG. 60, both the author_id directory name and the disc_id directory name are “1”. That is, an update file having both author_id and disc_id of 1 is recorded under the directory shown in FIG.

  As shown in FIG. 60, the name of the update data file recorded in the local storage 24 is obtained by inserting “.” (Period) and a 4-digit number between the file name and the extension. . This 4-digit number indicates a version number, which starts from 0000 and is incremented by 1 each time a new version update file is recorded. For example, when an update file of a PlayList file named “01001.mpls” is recorded in the PLAYLIST directory, the file name “01001. ****. Mpls (**** is the version number)” is stored in the PLAYLIST directory. When no file is recorded, i.e., when an update file for the PlayList file named `` 01001.mpls '' does not yet exist, the update file is recorded with the name `` 01001.0000.mpls '' and is already recorded in the PLAYLIST directory as `` 01001.0000. When the file “mpls” is recorded, the update file is recorded with the name “01001.0001.mpls”.

  Further, the update data downloaded from the server 3 includes metadata. The metadata is recorded in the same directory as the update file corresponding to the metadata with a file name with an extension “.data” added to the end of the file name of the update file.

  Then, the data file recorded on the optical disk 193 described with reference to FIG. 42 and the data file stored in the local storage 24 described with reference to FIG. 60 are merged to obtain the second virtual file. A system is generated.

  FIG. 61 shows the data structure of the second virtual file system.

  In the second virtual file system, the data file recorded on the optical disk 193 having the same author_id and disc_id and the data file stored in the local storage 24 are merged, and the name “VBDMV” is set. The file with the name “Index.bdmv” and the name “MovieObject.bdmv” stored in the “BDMV” directory of the optical disc 193 described with reference to FIG. The BACKUP directory, PLAYLIST directory, CLIPINF directory, STREAM directory, and AUXDATA directory are created so that the stored files are stored and have the same structure as the hierarchy below the BDMV directory. In addition, a data file is stored.

  Of the data files stored in the PLAYLIST directory, CLIPINF directory, STREAM directory, and AUXDATA directory of the second virtual file system, each of the data files actually stored in the local storage 24 has a metadata file. It is associated.

  In this way, the data is merged by the second virtual file system so that the content recorded on the optical disc and the content recorded on the local storage can be associated and reproduced.

  Similarly to the case described with reference to FIG. 2, in the second embodiment, in the PlayList, in addition to the main path (Main Path) specified by PlayItem, the sub-path as shown in FIG. The information of the sub path (Sub path) specified using the play item (Sub Play Item) can be included, and when the SubPlayItem is defined, for example, it is multiplexed on the Clip (eg, MPEG2 transport stream) specified by the PlayItem An independent data stream that is not converted can be reproduced in synchronization with AV stream reproduction.

  That is, as shown in FIG. 62, subtitle related information and subtitle related information composed of a text subtitle file and a font file necessary for rendering corresponding to the clip AV stream of the main path specified by PlayItem. By preparing a sub-path consisting of SubPlayItems that specify the playback section, the subtitles corresponding to the data described in the text subtitle file are displayed in synchronization with the playback of the clip AV stream. be able to.

  By acquiring the sub path and sub play item for the text subtitle stream, the user can reproduce the Clip AV stream set in the main path and the text subtitle stream in synchronization with each other. In addition, a plurality of text subtitle streams can be specified for one sub play item.

  Further, in the playback device 181 of the present disclosure, in order to perform synchronized playback, STC (System Time Clock) referred to in the main path playback process can be referred to in the sub path playback process. Also, in the sub-pass playback process, the decoder 192 can preload or partially preload the text subtitle stream.

  Furthermore, in the playback device 181 of the present disclosure, in the sub-pass playback process, the text subtitle stream is preloaded at once, or an EP_map related to the text subtitle file is created to perform high-speed processing on the text subtitle file. Random access can be realized.

  FIG. 63 can refer to the STC for synchronous playback, and can further pre-load or partially pre-load the text subtitle stream, and can execute random access to the text subtitle file. FIG. 28 is a block diagram illustrating a configuration of a decoder 192 of a playback device 181 to which the present disclosure is applied.

  Note that in the decoder 192 of FIG. 63, the same reference numerals are given to the portions corresponding to those described in FIG. 33, and description thereof will be omitted as appropriate. That is, in the decoder 192, an STC counter 211, a memory 216, a buffer 217, and a buffer 219 are newly provided, an audio decoder 212 is provided instead of the audio decoder 86, and an MPEG video decoder 87 is replaced with an MPEG video. A decoder 213 is provided, a control unit 214 is provided instead of the control unit 81, a disk data acquisition unit 215 is provided instead of the disk data acquisition unit 82, and storage data acquisition is performed instead of the storage data acquisition unit 91. The decoder 218 basically has the same configuration as that of the decoder 26 described with reference to FIG. 33 except that a text subtitle processing unit 220 is provided instead of the text subtitle processing unit 92. .

  The STC counter 211 counts STC. The audio decoder 212 refers to the counter value of the STC counter 211, calculates a PTS (Program Time Stamp), decodes the audio stream according to the calculated PTS, and outputs the decoded audio stream data. The MPEG video decoder 213 refers to the counter value of the STC counter 211, calculates the PTS, decodes the video stream according to the calculated PTS, and outputs the decoded video data to the video plane processing unit 88.

  The control unit 214 controls processing of each unit of the decoder 192 based on the control of the reproduction control unit 204. For example, the control unit 214 controls the disk data acquisition unit 215 or the storage data acquisition unit 218 to generate a text subtitle stream. The random access of the text subtitle stream is controlled by batch preloading and buffering in the buffer 217, or the SubPlayItem_IN_time and SubPlayItem_OUT_time corresponding to the text subtitle stream supplied from the disk data acquisition unit 215 or the storage data acquisition unit 218 Based on such information, an EP_map corresponding to the text subtitle stream is generated, stored in the memory 216, and the random access of the text subtitle stream can be controlled with reference to the stored EP_map. In addition, the control unit 214 is generated by switching play items under non-seamless connection conditions in the main path in order to play back the clip AV stream specified in the main path and the text subtitle stream specified in the sub path in synchronization. The text subtitle processing unit 220 is notified of information such as gaps in the decoding operation of the Clip AV stream by the audio decoder 212 and the MPEG video decoder 213.

  Based on the control of the control unit 214, the disc data acquisition unit 215 acquires the data supplied to the decoder 192 among the data read from the optical disc 193, and a multiplexed stream such as an AV stream specified by PlayItem Is supplied to the buffer 83, and text subtitle file or font file data designated by SubPlayItem is supplied to the buffer 84. In addition, the decoder 192 can preload or partially preload the text subtitle stream. When the text subtitle stream recorded on the optical disc 193 is preloaded, the disc data acquisition unit 215 reads all the corresponding text subtitle files and supplies them to the buffer 217. Further, when the text subtitle stream recorded on the optical disc 193 is partially preloaded, the disc data acquisition unit 215 acquires information such as SubPlayItem_IN_time and SubPlayItem_OUT_time corresponding to the text subtitle stream recorded on the optical disc 193, and This is supplied to the control unit 214.

  The memory 216 stores an EP_map corresponding to the text subtitle stream generated by the control unit 214. The buffer 217 stores the batch subloaded text subtitle stream supplied from the disk data acquisition unit 215 or the storage data acquisition unit 218.

  The storage data acquisition unit 218 acquires data supplied to the decoder 192 from the data read from the local storage 24 (that is, text subtitle file or font file data), and when batch preloading is performed, When preloading is not performed in the buffer 217 or when partial preloading is performed, the buffer 217 is temporarily stored in a buffer (not shown) for an internal transport stream, and the acquired data is supplied to the buffer 219. Further, when the text subtitle stream recorded in the local storage 24 is partially preloaded, the storage data acquisition unit 218 acquires information such as SubPlayItem_IN_time and SubPlayItem_OUT_time corresponding to the text subtitle stream recorded in the local storage 24. To the control unit 214.

  The buffer 219 temporarily buffers the text subtitle stream data and font file data supplied to the text subtitle processing unit 220. The text subtitle processing unit 220 is supplied with text subtitle stream data and font file data, and is based on information such as the counter value of the STC counter 211 and the gap in the decoding operation of the ClipAV stream supplied from the control unit 214. The supplied text subtitle stream is decoded so as to be reproduced in synchronization with the ClipAV stream.

  As described above, in the decoder 192 of the playback device 181 to which the present disclosure is applied, the text subtitle stream can be preloaded or partially preloaded, and the text subtitle file can be randomly accessed at high speed. Can do.

  The batch preload is a method in which the disk data acquisition unit 215 or the storage data acquisition unit 218 acquires the entire text subtitle stream necessary for reproduction and preloads the buffer 217 at a time. The partial preload is a method in which the disk data acquisition unit 215 or the storage data acquisition unit 218 preloads only a part of the text subtitle stream. The transport stream data of the partially preloaded text subtitle stream is transmitted in units of source packets at a transfer rate corresponding to the leak rate value of the buffer 84 which is a transport stream buffer or a buffer (not shown) in the storage data acquisition unit 218. (The stream loaded into the buffer 219 is an elementary stream of TextSubtitle).

  Next, a case where the text subtitle stream is randomly accessed when the ClipAV stream is played back will be described.

  In the case of a Clip AV stream, EP_map is referred to obtain a source packet number from an arbitrary PTS value in PlayItem. EP_map will be described with reference to FIG.

  EP_map is a table storing a pair of a time stamp (PTS_EP_start) of an entry point in a clip and a source packet number (SPN_EP_start) to start decoding a stream in the clip AV stream file. Clip Information Defined in the file. In other words, the playback device 181 detects the source packet number (SPN_EP_start) of the source packet to be randomly accessed (to start decoding) by designating the time stamp (PTS_EP_start) of the entry point. Can do. That is, the playback device 181 can handle random access, fast forward playback, or fast reverse playback of the Clip AV stream by referring to the EP_map of the Clip AV stream. The source packet number is a number that is incremented by 1 in the order of the source packets in the AV stream file, and the top source packet number of the file is set to zero.

  However, the text subtitle stream does not have EP_map unlike the ClipAV stream in the standard.

  Therefore, the control unit 214 controls the disk data acquisition unit 215 or the storage data acquisition unit 218 to preload the text subtitle stream and buffer it in the buffer 217, and at the same time, the PTS value on the global time axis in the playback device 181 By obtaining a non-negative integer i that satisfies both of the following expressions (1) and (2) with respect to T, random access to the data position where the caption data corresponding to the PTS value T is stored is performed. Can be controlled.

start_PTS (i) ≤ T (1)
T ≦ end_PTS (i) (2)

  On the other hand, since the text subtitle stream has the property of time-series data like the audio / video ClipAV stream, the relationship represented by the following equation (3) always holds.

        end_PTS (i) ≦ start_PTS (i + 1) (3)

  Therefore, the control unit 214 performs, for example, a B-Tree input as a fast algorithm for obtaining a non-negative integer i that satisfies the conditions shown in Expression (1) and Expression (2) for an arbitrary PTS value T. By using decking or the like, random access to subtitle data can be controlled. Note that the control unit 214 uses an algorithm other than B-Tree indexing for a non-negative integer i that satisfies the conditions shown in Expression (1) and Expression (2) for an arbitrary PTS value T. It goes without saying that you may be asked to

  In addition, when the text subtitle stream is partially preloaded, the control unit 214 may control only sequential access without permitting random access. In addition, the control unit 214 receives supply of information such as SubPlayItem_IN_time and SubPlayItem_OUT_time corresponding to the text subtitle stream recorded on the optical disc 193 from the disc data acquisition unit 215 during playback of the PlayList, or from the storage data acquisition unit 218. Upon receipt of information such as SubPlayItem_IN_time and SubPlayItem_OUT_time corresponding to the text subtitle stream recorded in the local storage 24, an EP_map of the text subtitle stream similar to the EP_map described with reference to FIG. 64 is generated in advance. The random access may be controlled by referring to the EP_map of the text subtitle stream stored in the memory 216 and stored in the memory 216.

  FIG. 65 is a block diagram showing a configuration of the text subtitle processing unit 220 in FIG.

  In the text subtitle processing unit 220 of FIG. 65, the same reference numerals are given to the portions corresponding to those described with reference to FIG. 34, and the description thereof will be omitted as appropriate. That is, the text subtitle processing unit 220 acquires information such as the counter value of the STC counter 211 and the gap of the decoding operation of the ClipAV stream supplied from the control unit 214, and the text subtitle stream is reproduced in synchronization with the ClipAV stream. As described above, an STC processing unit 231 that calculates a PTS serving as a reference for the operation of the text data decoder 232 is newly provided, and instead of the text data decoder 121, the STC processing unit 231 uses the PTS calculated based on the STC. Based on this, it has basically the same configuration as the text subtitle processing unit 92 described with reference to FIG. 34 except that a text data decoder 232 for decoding the supplied text subtitle stream is provided.

  In the text data decoding process by the text data decoder 232, the clip AV stream and the text subtitle stream can be synchronized by referring to the STC referenced by the ClipAV stream of the MainPath. However, since the ClipAV stream can hold a plurality of STCs in one PlayList file, if the text data decoder 232 directly refers to the STC referred to by the Main Path ClipAV stream, the playback control of the text subtitle stream is complicated. It becomes a factor that becomes. Further, the text subtitle stream does not have a PCR packet as described above.

  Therefore, in the text subtitle processing unit 220 that decodes the text subtitle stream, a consistent global time axis is assumed in the playback device 181 based on the STC that is referred to when the Main Path Clip AV stream is played back. The STC processing unit 231 calculates a time stamp based on the time axis and supplies the time stamp to the text data decoder 232. The text data decoder 232 executes a decoding process based on the supplied time stamp.

  That is, as shown in FIG. 66, the Clip AV stream refers to the STC in each PlayItem in one PlayList file. Therefore, the STC processing unit 231 adds up the counter values of the STC counter 211 to configure a global time axis in the PlayList, and calculates a PTS that serves as a reference for the operation of the text data decoder 232.

  At that time, as shown in FIG. 67, the STC processing unit 231 needs to integrate the counter value of the STC counter 211 in consideration of a gap generated by PlayItem switching under a non-seamless connection condition. Therefore, the STC processing unit 231 acquires information such as a gap of the decoding operation of the ClipAV stream supplied from the control unit 214, and based on the information, the counter value of the STC counter 211 considering the gap generated by PlayItem switching Is performed to calculate a PTS that is a reference for the operation of the text data decoder 232.

  As described with reference to FIGS. 66 and 67, the text data decoder 232 considers the gap generated by PlayItem switching and accumulates the counter value of the STC counter 211 referred to by the Main Path Clip AV stream. Based on the calculated PTS, the supplied elementary stream of text subtitles is decoded.

  Next, the download process 2 which is the process of the playback apparatus 181 controller 191 for downloading the update file from the server 3 will be described with reference to the flowchart of FIG.

  This process is executed when the user instructs acquisition of update data regardless of whether or not the optical disc 193 is mounted on the playback device 181.

  In step S201, the data acquisition unit 33 of the controller 191 controls the Internet interface 24, accesses the server 3 via the Internet 2, and requests transmission of data corresponding to the update menu screen.

  In step S 202, the data acquisition unit 33 controls the Internet interface 24 and receives data corresponding to the update menu screen from the server 3 via the Internet 2. The data acquisition unit 33 supplies data corresponding to the update menu screen transmitted from the server 3 and received by the Internet interface 24 to the menu screen display control unit 31.

  In step S203, the menu screen display control unit 31 displays an update menu screen on the display device, and proceeds to step S204. Based on the signal supplied from the operation input acquisition unit 32, the menu screen button is selected by the user. It is determined whether or not the content of the update has been selected.

  In step S204, the menu screen display control unit 31 waits until it is determined that the content of the update has been selected. If it is determined that the content of the update has been selected, the process proceeds to step S205. Information representing the content of the update selected by the user is output from the menu screen display control unit 31 to the data acquisition unit 33.

  In step S205, the data acquisition unit 33 controls the Internet interface 24 to cause the server 3 to transmit information indicating the contents of the update, and requests download of the update file designated by the user.

  In step S206, the data acquisition unit 33 controls the Internet interface 24 to download a PlayList file, a ClipInformation file, a text subtitle stream file, and a font file prepared as update files by the server 3, and these files are downloaded. The local storage directory management unit 201 is notified of the download.

  In step S207, the local storage directory management unit 201 creates a directory identified by the ID in the local storage 24 based on the author_id and disc_id included in the metadata of the downloaded update data file. Thereby, for example, the file system having the structure described with reference to FIG. 60 is created in the local storage 24.

  In step S208, the local storage directory management unit 201 expands and stores each file downloaded from the server 3 in the directory created in step S209.

  By such processing, the update file is downloaded from the server 3 and recorded in the local storage 24. For example, a user who has purchased the optical disc 193 on which content such as a movie has been recorded is recorded on the optical disc 193 in advance. You can get and record the files needed to display subtitles in no language. Therefore, it is possible to view the content by displaying subtitles in the language desired by the user in synchronization with the AV stream recorded on the optical disc 193.

  The download of the update file as described above may be performed for a fee or may be performed for free.

  Next, the reproduction process 2 in which control is executed by the controller 191 will be described with reference to the flowchart of FIG.

  When the optical disk 193 is mounted and the reproduction of the recorded content is instructed in a state where the update file downloaded as described above is recorded in the local storage 24, the optical disk directory management unit 202 is in step S221. Reads the author_id and disc_id recorded so as not to be rewritable by the user from the optical disc 193, and outputs the read author_id and disc_id to the local storage directory management unit 201.

  In step S222, the local storage directory management unit 201 searches the file system of the local storage 24 corresponding to the file system of the optical disc 193 based on the author_id and disc_id supplied from the optical disc directory management unit 202, and merges the file system. This is supplied to the processing unit 203. As described above, the file system corresponding to the file system of the optical disc 193 is stored in a directory that can be specified using the author_id and disc_id in the local storage 24 (FIG. 60).

  At this time, the file system of the optical disk 193 is output from the optical disk directory management unit 202 to the file system merge processing unit 203, and the file system of the optical disk 193 and the file system of the local storage 24 will be described with reference to FIG. Merged as you did. In step S223, a virtual file system generation process described later with reference to FIG. 70 is executed to generate a second virtual file system. The generated second virtual file system is output to the playback control unit 204 and used for playback of the AV stream file.

  In step S224, the playback control unit 204 specifies a MovieObject from the generated second virtual file system and executes a playback command included in the MovieObject. In step S225, the playback control unit 204 specifies a playback section in the playback command included in the MovieObject. In step S226, the local storage directory management unit 201 and the optical disc directory management unit 202 are controlled to refer to the files (AV file, text subtitle file, font file, etc.) referred to by the acquired PlayList and SubPlayItem. ) Is read out and supplied to the decoder 192.

  In step S227, the content playback process 2 described later using FIG. 71 or the content playback process 3 described later using FIG. 74 is executed, and the read AV stream file, text subtitle stream file, and the like are read out. Decoding is performed, video, audio, or subtitles are output from the display device, and the process ends.

  As described above, the second virtual file system is generated and used at the time of content reproduction. For example, data of a text subtitle file referred to by SubPlayItem is read and reproduced at the same time as the AV stream.

  Next, the virtual file system generation process executed in step S223 of FIG. 69 will be described with reference to the flowchart of FIG.

  The file system merge processing unit 203 merges the file system of the optical disk 193 and the file system of the local storage 24 as described with reference to FIG. 61 to generate a second virtual file system.

  In step S241, the file system merge processing unit 203 determines whether the update file to be processed, that is, the value of the operation_type of the metadata in the file system detected in step S222 in FIG. 69 is 0x01. If it is determined in step S241 that the operation_type value of the metadata of the update file is not 0x01, the process proceeds to step S243 described later.

  If it is determined in step S241 that the operation_type value of the metadata of the update file is 0x01, in step S242, the file system merge processing unit 203 is updated by exchanging the PlayList of the optical disc 193 with the PlayList of the update file. The second virtual file system is generated, and the process returns to step S223 in FIG. 69 and proceeds to step S224. That is, when it is determined that the operation_type value of the update file metadata is 0x01, the PlayList downloaded and recorded in the local storage 24 is referred to as it is, and the PlayList on the optical disc 193 is not referred to at all.

  When it is determined in step S241 that the operation_type value of the update file metadata is not 0x01, in step S243, the file system merge processing unit 203 determines that the update file to be processed, that is, in step S222 of FIG. It is determined whether or not the operation_type value of the metadata in the detected file system is 0x02. If it is determined in step S243 that the operation_type value of the metadata is not 0x02, the process proceeds to step S225.

  If it is determined in step S243 that the value of the operation_type of the metadata is 0x02, in step S244, the file system merge processing unit 203 is updated by adding the SubPath of the update file to the PlayList file of the optical disc 193. The second virtual file system is generated, and the process returns to step S223 in FIG. 69 and proceeds to step S224. That is, when it is determined that the operation_type value of the update file metadata is 0x02, the SubPath element is extracted from the downloaded file and recorded on the optical disc 193 as described with reference to FIGS. The file system is merged and updated so that the extracted SubPath element is added to the subPath element being added.

  If it is determined in step S243 that the value of the operation_type of the metadata is not 0x02, in step S245, the file system merge processing unit 203 is detected in step S222 in FIG. 69, that is, the update file to be processed. It is determined whether or not the operation_type value of the metadata in the file system is 0x03. If it is determined in step S245 that the operation_type value of the metadata is not 0x03, the process proceeds to step S227.

  When it is determined in step S245 that the value of the operation_type of the metadata is 0x03, in step S246, the file system merge processing unit 203 is updated by adding the SubPlayItem of the update file to the PlayList file of the optical disc 193. The second virtual file system is generated, and the process returns to step S223 in FIG. 69 and proceeds to step S224. That is, when it is determined that the operation_type value of the update file metadata is 0x03, the SubPlayItem element is extracted from the downloaded file and recorded on the optical disc 193 as described with reference to FIGS. 49 and 50. The file system is merged and updated so that the extracted SubPlayItem element is added to the subplayitem element being added.

  If it is determined in step S245 that the value of operation_type of the metadata is not 0x03, that is, if the value of operation_type is 0x04, in step S247, the file system merge processing unit 203 performs the subplayitem to which SubClip_entry is added, It is determined whether or not the value of is_multi_Clip_entries (FIG. 45) is 1.

  If it is determined in step S247 that the value of is_multi_Clip_entries is not 1, that is, if the SubPlayItem to which SubClip_entry is added refers to only one SubClip_entry currently, the file system merge processing unit 203 updates in step S248. The value of is_multi_Clip_entries of SubPlayItem to which SubClip_entry in the original PlayList file is added is set to 1.

  When it is determined in step S247 that the value of is_multi_Clip_entries is 1, or after the process of step S248 is completed, in step S249, the file system merge processing unit 203 adds the number_of_Clip_entries of the SubPlayItem to which SubClip_entry is added (FIG. 45). The value of is increased by 1 from the current value. That is, the set value of the number of sub clips referred to by the SubPlayItem to which SubClip_entry is added is increased by one.

  In step S250, the file system merge processing unit 203 generates a second virtual file system updated by adding the SubClip_entry of the update file to the SubPlayItem of the PlayList file of the optical disc 193, and the processing is as shown in FIG. It returns to step S223 and progresses to step S224. That is, when it is determined that the operation_type value of the metadata of the update file is 0x04, after the values of is_multi_Clip_entries and number_of_Clip_entries of SubPlayItem described with reference to FIG. 45 are appropriately modified, FIG. 51 and FIG. 52 are used. As described above, the SubClip_entry element is extracted from the downloaded file, and the file system is merged and updated so that the extracted SubClip_entry element is added to the SubClip_entry element recorded on the optical disc 193.

  By such processing, the data recorded on the optical disc 193 and the data recorded on the local storage 24 are merged and recorded on the optical disc 193 by a method determined by the value of operation_type of the metadata. The second virtual file system is generated so that the user can see the data as updated by the data of the update file recorded in the local storage 24.

  In addition, as described above, there are two types of methods for loading text subtitle data for content playback: batch preloading and partial loading. When partial loading is executed, it is necessary to create an EP_map corresponding to the text subtitle data in order to enable random access of the text subtitle data.

  Next, the content reproduction process 2 executed in step S227 of FIG. 68 will be described with reference to the flowchart of FIG. In the content reproduction process 2, the text subtitle data can be randomly accessed by pre-loading the text subtitle data.

  In step S261, the playback control unit 204 controls the decoder 192 to play back AV stream data specified by the PlayItem of the second virtual file system generated by the process described with reference to FIG.

  In steps S262 to S264, basically the same processing as in steps S62 to S64 in FIG. 37 is executed. That is, it is determined whether or not an operation input for instructing display of caption data has been received. If it is determined that an operation input for instructing display of caption data has been received, a signal corresponding to the user's operation input is controlled to display the menu screen. A list menu of subtitle data that can be displayed on the display device is displayed, and it is determined whether or not an operation input specifying the language of the subtitle data to be displayed has been received. If it is determined in step S264 that an operation input specifying the language of the caption data to be displayed has not been received, the process returns to step S263, and the subsequent processes are repeated.

  If it is determined in step S264 that an operation input specifying the language of the caption data to be displayed has been received, the operation input acquisition unit 32 supplies a signal corresponding to the user operation input to the reproduction control unit 204 in step S265. . The playback control unit 204 controls the local storage directory management unit 201 to transmit the text subtitle data referred to by the SubPlayItem specified based on the user operation input, that is, the text subtitle data, to the storage data acquisition unit 218 of the decoder 192. Based on the control of the control unit 214, the buffer 217 is preloaded and, if necessary, the font data corresponding to the font designated by the user is read, and the storage data acquisition unit of the decoder 192 is read. 218 is supplied.

  In step S266, caption display processing 2 described later with reference to FIGS. 72 and 73 is executed.

  In steps S267 to S269, basically the same processing as that in steps S67 to S69 of FIG. 37 is executed. That is, it is determined whether or not an operation input for instructing a change in the language of the caption data to be displayed has been received. If it is determined that an operation input for instructing a change in the language of the caption data to be displayed has been received, the process proceeds to step S265. Return to, and the subsequent processing is repeated. Further, when it is determined in step S262 that an operation input for instructing display of caption data has not been received, or in step S267, it has been determined that an operation input for instructing change of the language of the caption data to be displayed has not been received. In step S268, it is determined whether or not an operation input for instructing the end of content reproduction has been received, or whether or not the AV stream data being reproduced has been completed, and an operation input for instructing the end of content reproduction. If it is determined that the AV stream data being reproduced has not ended, it is determined in step S269 whether or not an operation input for stopping the display of subtitles has been received. If it is determined that the operation input for stopping the display of subtitles has not been received, the process returns to step S266, and the subsequent processing is repeated, and if it is determined that the operation input for stopping the display of subtitles has been received, The processing returns to step S261, and the subsequent processing is repeated.

  If it is determined in step S268 that an operation input commanding the end of content playback has been received or the AV stream data being played back has ended, the process returns to step S227 in FIG. 68 and ends.

  By such processing, the data corresponding to the subtitles in the language desired by the user among the text subtitle files downloaded from the server 3 and stored in the local storage 24 can be randomly accessed and recorded on the optical disc 193. The text subtitle file to be read is changed in order to change the language of the displayed subtitle based on the user's operation input.

  Next, caption display processing 2 executed in step S266 of FIG. 71 will be described with reference to the flowcharts of FIGS. 72 and 73.

  In step S291, the control unit 214 of the decoder 192 calculates a decoding start position in random access. Then, the control unit 214 performs text subtitle processing on the text subtitle data that is pre-loaded and buffered in the buffer 217 based on the calculation result of the decoding start position, that is, text subtitle data, via the buffer 219. To the unit 220.

  In step S292, the text data decoder 232 of the text subtitle processing unit 220 of the decoder 192 is supplied by the count and control unit 214 of the same STC counter as the STC referenced by the ClipAV stream by the processing of the STC processing unit 231. The supplied text subtitle data is decoded based on the PTS calculated in consideration of the gap generated by PlayItem switching based on information such as the gap in the decoding operation of the ClipAV stream.

  In steps S293 to S305, basically the same processing as the processing executed in steps S92 to S104 of FIGS. 38 and 39 is executed. That is, the text data decoder 232 of the text subtitle processing unit 220 supplies the character object included in the decoded text subtitle data to the character object buffer 122 of the text subtitle processing unit 220 for buffering, and the text data decoder 232. Supplies the attribute data included in the decoded text subtitle data to the attribute data buffer 123 of the text subtitle processing unit 220 and causes the attribute data buffer 123 to buffer the attribute data.

  Then, the control unit 214 determines whether or not an input of a signal indicating an operation input instructing to change the subtitle attribute such as the font size is received from the reproduction control unit 204 (controller 191), and the subtitle attribute is determined. When it is determined that a signal indicating an operation input for instructing the change is received, the attribute data held in the attribute data buffer 123 is changed.

  If it is determined in step S295 that a signal indicating an operation input for instructing change of the caption attribute has not been received, or after the processing in step S296, the character object buffer 122 and the attribute data buffer 123 receive characters. It is determined whether or not an object and attribute data have been acquired and a signal indicating an operation input for instructing a font type change is received from the reproduction control unit 204 (controller 191), and an operation input for instructing a font type change is performed. When it is determined that an input signal is received, different font data is read from the local storage 24 based on the operation input by the processing of the local storage directory management unit 201 (controller 191) under the control of the reproduction control unit 204. Put out, different Cement data is acquired.

  If it is determined in step S298 that an input signal indicating an operation input for instructing the font type change has not been received, or after the processing in step S299, the acquired attribute and bookmark buffer 125 are referred to. When the subtitle data to be rasterized is bookmarked, it is determined whether or not the subtitle data is already buffered in the bookmark buffer 125, and it is determined that the subtitle data is bookmarked and buffered. Then, the font rasterizer 124 reads out the saved subtitle image data (raster data) to be bookmarked from the bookmark buffer 125 and outputs it.

  If it is determined that the subtitle data is not already bookmarked, rasterization is executed on the basis of the acquired character object and attribute data, and the subtitle graphics plane is output to the subtitle graphics plane processing unit 93. Is generated and supplied to the synthesis processing unit 94. Then, it is determined whether or not a new bookmark is described in the attribute data. When it is determined that a bookmark is described, rasterized subtitle image data is stored in the bookmark buffer 125.

  Then, the synthesizing unit 94 synthesizes the supplied subtitle image data with the video data and outputs it, and the process returns to step S266 of FIG. 71 and proceeds to step S267.

  Through such processing, the text subtitle file and font file data that have been preloaded in a batch are read so that the subtitle data in the user's desired language is displayed in the user's desired font with the user's desired attributes. Controlled, the buffered attribute data is changed and rasterized as needed.

  Next, the content reproduction process 3 executed in step S227 of FIG. 68 will be described with reference to the flowchart of FIG. In the content reproduction process 3, the text subtitle data is partially preloaded and an EP_map corresponding to the text subtitle stream is generated so that the text subtitle data can be randomly accessed.

  In step S361, the playback control unit 204 controls the decoder 192 to play back the AV stream data specified by the PlayItem of the second virtual file system generated by the processing described with reference to FIG.

  In steps S362 to S364, basically the same processing as in steps S62 to S64 in FIG. 37 is executed. That is, it is determined whether or not an operation input for instructing display of caption data has been received. If it is determined that an operation input for instructing display of caption data has been received, a signal corresponding to the user's operation input is controlled to display the menu screen. A list menu of subtitle data that can be displayed on the display device is displayed, and it is determined whether or not an operation input specifying the language of the subtitle data to be displayed has been received. If it is determined in step S364 that an operation input specifying the language of the caption data to be displayed has not been received, the process returns to step S363, and the subsequent processes are repeated.

  If it is determined in step S364 that an operation input specifying the language of the caption data to be displayed has been received, the control unit 214 of the decoder 192 reads the text recorded on the optical disc 193 from the disc data acquisition unit 215 in step S365. Receive information such as SubPlayItem_IN_time and SubPlayItem_OUT_time corresponding to the subtitle stream, or supply information such as SubPlayItem_IN_time and SubPlayItem_OUT_time corresponding to the text subtitle stream recorded in the local storage 24 from the storage data acquisition unit 218. The EP_map of the text subtitle stream, which is the same as the EP_map described using 64, is generated and stored in the memory 216.

  In step S366, the operation input acquisition unit 32 supplies the reproduction control unit 204 with a signal corresponding to the user operation input. The playback control unit 204 controls the local storage directory management unit 201 to transmit the text subtitle data referred to by the SubPlayItem specified based on the user operation input, that is, the text subtitle data, to the storage data acquisition unit 218 of the decoder 192. Based on the control of the control unit 214, the buffer 84 is buffered, or the buffer in the storage data storage unit 218 is buffered, and the font specified by the user is set as necessary. The corresponding font data is read out and supplied to the storage data acquisition unit 218 of the decoder 192.

  In step S367, the decoder 192 executes subtitle display processing 3 to be described later with reference to FIGS.

  In steps S368 to S370, basically the same processing as in steps S67 to S69 of FIG. 37 is executed. That is, it is determined whether or not an operation input for instructing a change in the language of the caption data to be displayed has been received. If it is determined that an operation input for instructing a change in the language of the caption data to be displayed has been received, the process proceeds to step S365. Return to, and the subsequent processing is repeated. Further, when it is determined in step S362 that no operation input for instructing display of caption data has been received, or in step S368, it has been determined that no operation input for instructing change of the language of the caption data to be displayed has been received. If so, it is determined in step S369 whether or not an operation input for instructing the end of content playback has been received, or whether or not the AV stream data being played back has ended, and an operation input for instructing the end of content playback. If it is determined that the AV stream data being played back has not ended, it is determined in step S370 whether an operation input for stopping the display of subtitles has been received. When it is determined that the operation input for stopping the display of subtitles has not been received, the process returns to step S367, and the subsequent processing is repeated, and when it is determined that the operation input for stopping the display of subtitles has been received, The processing returns to step S361, and the subsequent processing is repeated.

  If it is determined in step S369 that an operation input for instructing the end of content playback has been received or the AV stream data being played back has ended, the process returns to step S227 in FIG. 68, and the process is ended. The

  Through such processing, an EP_map corresponding to the text subtitle stream downloaded from the server 3 and stored in the local storage 24 is generated, and data corresponding to the subtitle in the language desired by the user can be randomly accessed. The text subtitle file to be read is changed in order to change the language of the displayed subtitle based on the user's operation input.

  Next, caption display processing 3 executed in step S367 of FIG. 74 will be described with reference to the flowcharts of FIGS.

  In step S391, the control unit 214 of the decoder 192 refers to the EP_map generated in step S365 of FIG. 74 and stored in the memory 216, and buffers the buffer 84 or the buffer inside the storage data acquisition unit 218. The text subtitle data, that is, the text subtitle data, is supplied to the text subtitle processing unit 220 via the buffer 219, and the text subtitle processing unit 220 is controlled to be decoded. The text data decoder 232 of the text subtitle processing unit 220 of the decoder 192 decodes the clip AV stream supplied by the control unit 214 and the count of the same STC counter as the STC referenced by the clip AV stream by the processing of the STC processing unit 231. The supplied text subtitle data is decoded based on the PTS calculated in consideration of the gap generated by PlayItem switching based on the information such as the gap of operation.

  In steps S392 to S404, basically the same processes as those executed in steps S92 to S104 of FIGS. 38 and 39 are executed. That is, the text data decoder 232 of the text subtitle processing unit 220 supplies the character object included in the decoded text subtitle data to the character object buffer 122 of the text subtitle processing unit 220 for buffering, and the text data decoder 232. Supplies the attribute data included in the decoded text subtitle data to the attribute data buffer 123 of the text subtitle processing unit 220 and causes the attribute data buffer 123 to buffer the attribute data.

  Then, the control unit 214 determines whether or not an input of a signal indicating an operation input instructing to change the subtitle attribute such as the font size is received from the reproduction control unit 204 (controller 191), and the subtitle attribute is determined. When it is determined that a signal indicating an operation input for instructing the change is received, the attribute data held in the attribute data buffer 123 is changed.

  If it is determined in step S394 that a signal indicating an operation input for instructing a change in subtitle attribute has not been received, or after the processing in step S395, the character object buffer 122 and the attribute data buffer 123 receive a character. It is determined whether or not an object and attribute data have been acquired and a signal indicating an operation input for instructing a font type change is received from the reproduction control unit 204 (controller 191), and an operation input for instructing a font type change is performed. When it is determined that an input signal is received, different font data is read from the local storage 24 based on the operation input by the processing of the local storage directory management unit 201 (controller 191) under the control of the reproduction control unit 204. Put out, different Cement data is acquired.

  If it is determined in step S397 that a signal indicating an operation input for instructing change of the font type has not been received, or after the processing in step S398 is completed, the acquired attribute and bookmark buffer 125 are referred to. When the subtitle data to be rasterized is bookmarked, it is determined whether or not the subtitle data is already buffered in the bookmark buffer 125, and it is determined that the subtitle data is bookmarked and buffered. Then, the font rasterizer 124 reads out the saved subtitle image data (raster data) to be bookmarked from the bookmark buffer 125 and outputs it.

  If it is determined that the subtitle data is not already bookmarked, rasterization is executed on the basis of the acquired character object and attribute data, and the subtitle graphics plane is output to the subtitle graphics plane processing unit 93. Is generated and supplied to the synthesis processing unit 94. Then, it is determined whether or not a new bookmark is described in the attribute data. When it is determined that a bookmark is described, rasterized subtitle image data is stored in the bookmark buffer 125.

  The supplied caption image data is combined with the video data and output by the combining processing unit 94, and the process returns to step S367 in FIG. 74 and proceeds to step S368.

  Through such processing, the text subtitle file and font file data that have been preloaded in a batch are read so that the subtitle data in the user's desired language is displayed in the user's desired font with the user's desired attributes. Controlled, the buffered attribute data is changed and rasterized as needed.

  As described above, also in the second embodiment of the present disclosure, the content recorded on the optical disc and the content downloaded and recorded in the local storage can be associated and reproduced. Further, the second virtual file system for reproducing the content recorded on the optical disc and the content recorded on the local storage is related to the metadata of the archive data downloaded and recorded on the local storage. It is generated based on the value specified for operation_type included in.

  Further, in the second embodiment of the present disclosure, the content downloaded and recorded in the local storage may be pre-loaded or partially pre-loaded at the time of playback, and by applying the present disclosure, Regardless of the preload format, the content recorded on the optical disc and the content recorded on the local storage are played back in synchronization with reference to the STC.

  The series of processes described above can also be executed by software. The software is a computer in which the program constituting the software is incorporated in dedicated hardware, or various functions can be executed by installing various programs, for example, a general-purpose personal computer For example, it is installed from the program recording medium.

  As shown in FIG. 1 or FIG. 40, the program recording medium includes a magnetic disk (including a flexible disk), an optical disk (including a flexible disk) that is distributed to provide a program to a user separately from a computer. Consists of removable media 28 such as CD-ROM (compact disk-read only memory), DVD (including digital versatile disk), magneto-optical disk (including MD (mini-disk) (trademark)), or semiconductor memory In addition, it is configured by a memory 23 such as a ROM or a RAM in which a program is recorded, a local storage 24 such as a hard disk, and the like provided to the user in a state of being incorporated in the apparatus main body in advance.

  Further, in this specification, the step of describing the program recorded on the program recording medium is not limited to the processing performed in chronological order according to the described order, but is not necessarily performed in chronological order. Or the process performed separately is also included.

  In the present specification, the term “system” represents the entire apparatus constituted by a plurality of apparatuses.

  DESCRIPTION OF SYMBOLS 1 Playback apparatus, 11 Optical disk, 21 Controller, 22 Optical disk drive, 23 Memory, 24 Local storage, 26 Decoder, 31 Menu screen display control part, 32 Operation input acquisition part, 33 Data acquisition part, 34 Local storage directory management part, 35 Optical disc directory management unit, 66 file system merge processing unit, 37 playback control unit, 81 control unit, 86 audio decoder, 87 MPEG video decoder, 92 text subtitle processing unit, 93 subtitle graphics plane processing unit, 94 compositing processing unit, 121 Text data buffer, 122 character object buffer, 123 attribute data buffer, 124 font rasterizer, 125 bookmark bar F, 181 playback device, 191 controller, 192 decoder, 193 optical disk, 201 local storage directory management unit, 202 optical disk directory management unit, 203 file system merge processing unit, 204 playback control unit, 211 STC counter, 214 control unit, 215 disk Data acquisition unit, 216 memory, 217 buffer, 218 storage data acquisition unit, 219 buffer, 220 text caption processing unit, 231 STC processing unit, 232 text data decoder

Claims (13)

In a playback device for playing back an AV stream recorded on a detachable recording medium and generating caption data for displaying a caption corresponding to the AV stream,
Font data holding means for holding font data in advance;
Storage means for storing at least first information including a character object and attribute data supplied from a server or a removable medium;
Reading control means for controlling reading of the first information from the recording medium in which at least the first information is recorded in advance, or the storage means;
Character object holding means for holding the character object included in the read first information;
Attribute data holding means for holding the attribute data included in the read first information;
Font data acquisition means for acquiring the font data from any of the font data holding means, the recording medium, or the storage means;
Conversion means for converting the character object held by the character object holding means into subtitle data using the attribute data held by the attribute data holding means and the font data acquired by the font data acquisition means;
An operation input acquisition means for acquiring a user operation input,
The first information includes an escape code,
The read control means includes
Further control of reading of the AV stream stored in the storage means and the second information, which is information for controlling reading of the first information, and the AV stream recorded on the recording medium And
Based on the operation input of the user acquired by the operation input acquisition means, the reading of the second information is controlled,
A playback device that controls reading of the AV stream and the first information based on the read second information. The reproducing apparatus according to claim 1, further comprising first decoding means for decoding the AV stream whose reading is controlled by the reading control means. The playback apparatus according to claim 2, further comprising output means for synthesizing and outputting the subtitle data converted by the conversion means and the video data included in the AV stream decoded by the first decoding means. Second decoding means for decoding the first information whose reading is controlled by the reading control means;
Counting means for counting a count value which is a reference for processing timing of decoding of the AV stream by the first decoding means;
3. The reproducing apparatus according to claim 2, further comprising: a calculation unit that calculates a processing timing reference for decoding the first information by the second decoding unit based on the count value counted by the counting unit. . A decoding means for decoding the first information whose reading is controlled by the reading control means;
The character object holding means holds the character object included in the first information decoded by the decoding means;
The reproducing apparatus according to claim 1, wherein the attribute data holding unit holds the attribute data included in the first information decoded by the decoding unit. Further comprising a communication means for exchanging information with the server via a network;
The playback apparatus according to claim 1, wherein the storage unit stores the first information received by the communication unit. Based on the file system of the first data group stored in the recording medium and the file system of the second data group stored in the storage means, the first data group and the second data group The playback device according to claim 6, further comprising virtual file system generation means for generating a virtual file system including at least a part of each of the data groups. The first information stored in the storage means includes second information related to generation of the virtual file system,
The read control means further controls reading of the second information stored in the storage means,
The playback device according to claim 7, wherein the virtual file system generation unit generates the virtual file system based on the second information whose reading is controlled by the reading control unit. The playback apparatus according to claim 1, wherein the storage unit stores the first information whose entire reading is controlled collectively by the reading control unit. Table information generating means for generating table information indicating a relationship between information indicating a decoding start point of the first information whose reading is controlled by the reading control means and a time stamp of the decoding start point;
The playback apparatus according to claim 1, wherein the reading control unit controls reading of the first information with reference to the table information generated by the table information generating unit. In a playback method of a playback device for playing back an AV stream recorded on a detachable recording medium and generating caption data for displaying a caption corresponding to the AV stream,
At least the first information from the recording medium in which the first information including at least a character object and attribute data is recorded or the first information supplied from a server or a removable medium is stored. A read control step for controlling the reading of
A character object holding step for holding the character object included in the read first information;
An attribute data holding step for holding the attribute data included in the read first information;
A font data acquisition step for acquiring the font data from any one of the font data holding means, the recording medium, or the storage means for holding font data in advance;
Converting the character object held by the character object holding step into subtitle data using the attribute data held by the attribute data holding step and the font data obtained by the font data obtaining step; and Including
The first information includes an escape code,
The read control step includes
Further control of reading of the AV stream stored in the storage means and the second information, which is information for controlling reading of the first information, and the AV stream recorded on the recording medium And
Control reading of the second information based on the operation input of the user acquired by the operation input acquisition means for acquiring the operation input of the user,
A reproduction method for controlling reading of the AV stream and the first information based on the read second information. A program for playing back an AV stream recorded on a detachable recording medium and causing a computer to execute processing for generating subtitle data for displaying subtitles corresponding to the AV stream,
At least the first information from the recording medium in which the first information including at least a character object and attribute data is recorded or the first information supplied from a server or a removable medium is stored. A read control step for controlling the reading of
A character object holding step for holding the character object included in the read first information;
An attribute data holding step for holding the attribute data included in the read first information;
A font data acquisition step for acquiring the font data from any one of the font data holding means, the recording medium, or the storage means for holding font data in advance;
Converting the character object held by the character object holding step into subtitle data using the attribute data held by the attribute data holding step and the font data obtained by the font data obtaining step; and Including
The first information includes an escape code,
The read control step includes
Further control of reading of the AV stream stored in the storage means and the second information, which is information for controlling reading of the first information, and the AV stream recorded on the recording medium And
Control reading of the second information based on the operation input of the user acquired by the operation input acquisition means for acquiring the operation input of the user,
A computer-readable program recording medium recording a program for causing a computer to execute processing for controlling reading of the AV stream and the first information based on the read second information. A program for playing back an AV stream recorded on a detachable recording medium and causing a computer to execute processing for generating subtitle data for displaying subtitles corresponding to the AV stream,
At least the first information from the recording medium in which the first information including at least a character object and attribute data is recorded or the first information supplied from a server or a removable medium is stored. A read control step for controlling the reading of
A character object holding step for holding the character object included in the read first information;
An attribute data holding step for holding the attribute data included in the read first information;
A font data acquisition step for acquiring the font data from any one of the font data holding means, the recording medium, or the storage means for holding font data in advance;
Converting the character object held by the character object holding step into subtitle data using the attribute data held by the attribute data holding step and the font data obtained by the font data obtaining step; and Including
The first information includes an escape code,
The read control step includes
Further control of reading of the AV stream stored in the storage means and the second information, which is information for controlling reading of the first information, and the AV stream recorded on the recording medium And
Control reading of the second information based on the operation input of the user acquired by the operation input acquisition means for acquiring the operation input of the user,
A program for causing a computer to execute processing for controlling reading of the AV stream and the first information based on the read second information.

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