JP5354316B1 - REPRODUCTION DEVICE, REPRODUCTION METHOD, AND RECORDING MEDIUM - Google Patents

Abstract

The present invention enables a user to reliably determine subtitles.
An attribute buffer includes: font style designation information for designating a font style to be applied to a subtitle character object held in the character object buffer; and a character object corresponding to the font style with an outline. It retains at least color designation information that can designate the outline color. The font rasterizer 124 acquires the font style data of the font style with the outline when the font style with the outline is designated in the font style designation information, updates the font style data based on the color designation information, The character object is converted into subtitle data using at least the updated font style data. The present invention can be applied to a playback apparatus.
[Selection] Figure 26

Description

  The present invention relates to a playback device, a playback method, and a recording medium, and more particularly, to a playback device, a playback method, and a recording medium that allow a user to reliably determine subtitles.

  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. Such a technique is also disclosed in, for example, Patent Document 1 and Patent Document 2.

  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.

JP 2003-140662 A JP 2002-31967 A

  However, although the subtitle and the video are played back simultaneously, that is, each of the sequentially played back frames includes the video and the corresponding subtitle. In a frame in which the color and the color of the video are the same or similar, there is a problem that the user may not be able to discriminate the caption because the caption is integrated with the video.

  The present invention has been made in view of such a situation, and makes it possible for a user to reliably determine subtitles.

  In the information processing apparatus for generating caption data for displaying captions corresponding to a predetermined AV stream, the playback apparatus according to the present invention includes a character object holding unit that holds a character object for displaying captions, and the caption is First position information indicating a horizontal position of a text box to be displayed, second position information indicating a vertical position of the text box, and at least a font style with an outline as a font style applied to a character object When the font style with outline is specified in the font style specification information that can be specified and the font style specification information, the width specification that can specify the outline width for the character object corresponding to the font style with the outline Information, and Attribute data holding means for holding attribute data including at least a user-selectable style set, and character object holding when an outline font style is specified in the font style specification information held by the attribute data holding means Conversion means for converting the character object held in the means into font-style subtitle data with an outline having a width designated by the width designation information. The style set includes first movement amount information indicating a horizontal movement amount of the position of the text box, and second movement amount information indicating a movement amount of the text box position in the vertical direction, The converting means converts the character object into the text box whose position is updated based on the first movement amount information and the second movement amount information included in the style set according to a user selection. It converts into the said caption data for displaying.

  The reproduction method of the present invention is a reproduction method of an information processing apparatus for generating subtitle data for displaying subtitles corresponding to a predetermined AV stream, wherein a character object for displaying the subtitles is held in a character object holding unit. , First position information indicating a horizontal position of the text box in which the subtitle is displayed, second position information indicating a vertical position of the text box, and an outline as a font style applied to the character object. If the font style with the outline is specified in the font style specification information, the outline of the character object corresponding to the font style with the outline is specified. Finger width Attribute data including at least a width specification information and a user-selectable style set are stored in an attribute data holding unit, and the font style with the outline in the font style specification information held by the attribute data holding unit The character object held by the character object holding means is converted into font style subtitle data with an outline having a width designated by the width designation information, and the style set Includes first movement amount information indicating a horizontal movement amount of the position of the text box, and second movement amount information indicating a movement amount of the text box position in the vertical direction. For the conversion to the caption data, the character object is The subtitle data for displaying the subtitle in the text box whose position is updated based on the first movement amount information and the second movement amount information included in the style set according to user selection. It is done like converting.

  The recording medium of the present invention includes a predetermined AV stream, a character object for displaying a caption corresponding to the AV stream, and first position information indicating a horizontal position of a text box in which the caption is displayed, Second position information indicating a vertical position of the text box, font style designation information capable of designating at least a font style with an outline as a font style applied to the character object, and the outline of the outline in the font style designation information A width specification information that can specify an outline width for a character object corresponding to the font style with the outline, and a user-selectable style set, wherein: Text box First movement amount information indicating a horizontal movement amount of the position, and attribute data including at least the style set including the second movement amount information indicating the vertical movement amount of the position of the text box are recorded. Recorded recording medium.

  In the present invention, the character object read from the recording medium is held in the character object holding unit, the attribute data read from the recording medium is held in the attribute data holding unit, and the attribute held in the attribute data holding unit When a font style with an outline is specified in the font style specification information included in the data, the character object held in the character object holding means is the font style with the outline of the width specified by the width specification information. Subtitle data is converted into subtitle data for displaying subtitles in a text box whose position is updated based on the first movement amount information and the second movement amount information included in the style set according to the user selection. Is done.

  According to the present invention, when a predetermined AV stream is being reproduced, subtitles corresponding to the AV stream can be displayed. In particular, the user can reliably determine the caption.

It is a block diagram which shows the structure of the reproducing | regenerating apparatus to which this invention is applied. It is a figure which shows the example of the application format on the recording medium with which the reproducing | regenerating apparatus to which this invention is applied is mounted | worn. It is a figure for demonstrating a different example of the example of the application format on the recording medium with which the reproducing | regenerating apparatus to which this invention is applied is mounted | worn. 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 which shows the structural example of a text subtitle file. It is a figure which shows the syntax of the text subtitle file of FIG. It is a figure which shows the syntax of each segment which comprises the text subtitle of FIG. FIG. 13 is a diagram for explaining the syntax of segment_descriptor among the constituent elements of the segment of FIG. 12. It is a figure explaining the value which can be specified by segment_type of FIG. It is a figure which shows the syntax of dialog_style_segment of each segment which comprises the text subtitle of FIG. It is a figure explaining the syntax of dialog_style_set among the components of dialog_style_segment of FIG. It is a figure explaining the syntax of dialog_style_set among the components of dialog_style_segment of FIG. It is a figure explaining the value which can be specified by player_style_flag of FIG. It is a figure explaining the value which can be specified by text_flow of FIG. It is a figure explaining the value which can be specified by text_horizontal_alignment of FIG. It is a figure explaining the value which can be specified by text_vertical_alignment of FIG. It is a figure explaining the value which can be specified by font_style of FIG. It is a figure which shows an example of the table which updated the part required in order to apply this invention with respect to Table 959 (Data_type definition) of the conventional Blu-Ray Disc Read-Only Format Version0.89r3. 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. FIG. 27 is a block diagram for explaining a detailed configuration of the font rasterizer of FIG. 26. It is a figure which shows an example of the character object data of a normal font style. It is a figure which shows an example of the character object data of an outline style. It is a figure explaining an example of the conventional method among the change methods of the size (width) of an outline. It is a figure explaining an example of the method to which this invention is applied among the change methods of the size (width) of an outline. It is a flowchart for demonstrating reproduction | regeneration processing. It is a flowchart for demonstrating a content reproduction process. It is a flowchart for demonstrating a caption display process. It is a flowchart for demonstrating a caption display process.

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

  FIG. 1 is a block diagram showing a configuration example of a playback apparatus 1 as an information processing apparatus to which the present invention 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 a recording medium. The recording medium referred to here includes, for example, a magnetic disk, a semiconductor memory, and the like in addition to the optical disk 11 mounted on the reproducing apparatus 1 to which the present invention is applied.

  This 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 designates the subtitle corresponding to the data described in the text subtitle file at the same time as the playback of the Clip AV stream, the display font is based on the font style data described in the font file. It can be displayed on a display 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).

  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.

  FIG. 4 is a block diagram illustrating a functional configuration example of the controller 21 of FIG.

  Each configuration of FIG. 4 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. 5 is a diagram showing 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. 5, 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. 5, 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 the caption related information.

  The STREAM folder stores a file with the name “01000.m2ts” and a file with the name “02000.m2ts”. These files are AV stream, subtitle related information, and the like.

  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. The xxx-yyy folder is created when the optical disc 11 having Studio_id “xxx” and Content_id “yyy” is mounted on the playback apparatus 1 and an update file (each file stored in the xxx-yyy folder) is downloaded. It is what is done.

  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. 5, 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 a downloaded Update PlayList, 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.

  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.

  Similarly, in the example of FIG. 5, a folder with the name “xxx-aaa” and a folder with the name “yyy-bbb” are set under “root” in the local storage 24. 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. 6 is a diagram illustrating an example of a first virtual file system obtained from the two file systems of FIG.

  In FIG. 6, 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. 7, 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 And subtitle related information stored in advance on the optical disc 11 and stored in the local storage 24 after being downloaded or copied based on user operation input. The subtitle data in the language desired by the user among the subtitles in a plurality of languages that can be displayed by the above is processed and displayed in association with the AV stream stored in advance on the optical disc 11.

  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.

  FIG. 8 shows an archive of such data to be additionally distributed (corresponding to data stored in the local storage 24).

  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. 9 is a diagram illustrating the syntax of SubPlayItem.

  The 8-bit field of Ref_to_STC_id designates 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.

  In the present embodiment, the text subtitle file (text subtitle file, text_subtitle_file referred to in FIG. 8) is configured as a stream file as shown in FIG. Hereinafter, the text subtitle file configured as a stream file in this way is referred to as a text subtitle stream file (Text_Subtitle_Stream File).

  As shown in the top diagram of FIG. 10, the text subtitle stream file is a plurality of transport packets (packets described as TP in FIG. 10 at the time of transmission). In the form of a transport stream composed of

  In the example of FIG. 10, the transport stream is composed only of TPs having the same PID of 0x1800. In other words, in the example of FIG. 10, the transport stream is configured by only the TP corresponding to a part of the text subtitle stream file. That is, in the example of FIG. 10, the transport stream is composed of only the text subtitle stream file.

  Such a transport stream is a unit of a PES (Packetized Elementary Stream) packet at the time of data processing (for example, at the time of recording processing or playback processing) or before that, as shown in the second diagram from the top in FIG. Is converted to a stream. That is, the second diagram from the top in FIG. 10 shows a configuration example of a text subtitle stream file in units of PES packets. The first PES packet among the plurality of PES packets constituting the text subtitle stream file is referred to as Dialog Style Segment. This Dialog Style Segment is a PES packet corresponding to attribute data described later. Each of the plurality of PES packets following the Dialog Style Segment is referred to as a Dialog Presentation Segment. This Dialog Presentation Segment is a PES packet corresponding to a character object described later.

  FIG. 11 is a diagram showing the syntax of such a text subtitle stream (Text_subtitle_stream) file.

  In FIG. 11, a 16-bit field of number_of_dialog_presentation_segments designates the number of Dialog Presentation Segments following Dialog Style Segment. In other words, the Text Subtitle Stream (Text_subtitle_stream) file is configured such that a Dialog Style Segment is arranged at the head, and thereafter, a number of Dialog Presentation Segments specified by number_of_dialog_presentation_segments are arranged.

  FIG. 12 is a diagram illustrating a general syntax of one segment.

  As shown in FIG. 12, one segment (Segment) is composed of segment_descriptor and segment_data.

  FIG. 13 is a diagram illustrating the syntax of segment_descriptor.

  The 8-bit field of segment_type specifies the segment type. Specifically, in segment_type, a predetermined one of the segment types shown in FIG. 14 is designated by a value corresponding to that (value in the same row in FIG. 14). That is, when the segment type is Dialog Style Segment, 0x81 is set as segment_type. When the segment type is Dialog Presentation Segment, 0x82 is set as segment_type. Note that 0x00 to 0x13, 0x19 to 0x7F, and 0x83 to 0xFF are prepared as spares. Also, 0x14 to 0x18 and 0x80 are prepared as values for designating segments for the graphic stream.

  The 16-bit field of segment_length specifies the number of bytes of this segment.

  Of the segments having the syntax shown in FIGS. 12 to 14, the Dialog Style Segment syntax is as shown in FIG.

  That is, segment_data in FIG. 12 is dialog_style_set in the Dialog Style Segment in FIG.

  16 and 17 show the syntax of this dialog_style_set. Although the details will be described later, this syntax makes it possible to implement “add an outline to a character object used in text constituting subtitles”, which is one of the features of the present invention.

  In FIG. 16, a 1-bit field of player_style_flag specifies whether or not to allow this dialog_style_set to be changed to a user-specific style. That is, as shown in FIG. 18, when the permission is not performed (prohibited), 0b is designated as the player_style_flag. On the other hand, when the permission is given, 1b is specified as player_style_flag.

  The 8-bit field of number_of_region_styles specifies the number of region_styles (described later) used in this dialog_style_set. An 8-bit field of number_of_user_styles specifies the number of user_styles (described later) used in this dialog_style_set.

  The 8-bit field of region_style_id specifies the identifier of the target region_style (region style). A region indicates a drawing area.

  The 16-bit field of region_horizontal_position specifies the horizontal coordinate of the target region. The 16-bit field of region_vertical_position specifies the vertical coordinate of the target region. The 16-bit field of region_width specifies the width of the target region. The 16-bit field of region_height specifies the height of the target region. The 8-bit field of region_bg_palette_entry_id_ref specifies the background color of the target region.

  The 16-bit field of text_box_horizontal_position specifies the horizontal coordinate of the text box (the range in which the text composing the subtitle is displayed) in the target region. The 16-bit field of text_box_vertical_position specifies the vertical coordinate of the text box. The 16-bit field of text_box_width specifies the width of the text box. The 16-bit field of text_box_height specifies the height of the text box.

  The 8-bit field of text_flow specifies the display direction of the text displayed in the text box in the target region. Specifically, in text_flow, a predetermined one of the display directions shown in FIG. 19 is specified by a value corresponding to that (value on the same line in FIG. 19). That is, when the display direction is the direction from the left to the right in the horizontal direction, 1 is designated as text_flow. When the display direction is the direction from the right to the left in the horizontal direction, 2 is specified in the text_flow. When the display direction is the direction from the top to the bottom in the vertical direction, 3 is specified in text_flow. Note that values other than 0 and 1 to 3 are prepared as spare values.

  The 8-bit field of text_horizontal_alignment specifies the right alignment, left alignment, and center alignment (center alignment in the horizontal direction) of the text displayed in the text box in the target region. Specifically, a value as shown in FIG. 20 is specified for text_horizontal_alignment. That is, in the case of left alignment, 1 is designated as text_horizontal_alignment. In the case of center alignment, 2 is specified for text_horizontal_alignment. In the case of right alignment, 3 is specified as text_horizontal_alignment. Note that values other than 0 and 1 to 3 are prepared as spare values.

  The 8-bit field of text_vertical_alignment specifies the top alignment, bottom alignment, and center alignment (center alignment in the vertical direction) of the text displayed in the text box in the target region. Specifically, a value as shown in FIG. 21 is specified for text_vertical_alignment. That is, in the case of top alignment, 1 is designated as text_vertical_alignment. In the case of center alignment, 2 is specified for text_vertical_alignment. In the case of bottom alignment, 3 is specified for text_vertical_alignment. Note that values other than 0 and 1 to 3 are prepared as spare values.

  The 8-bit field of line_space specifies the interval between baselines in the target region.

  The 8-bit field of font_id_ref specifies the font of the text displayed in the text box in the target region.

  The 8-bit field of font_style specifies the font style of the text displayed in the text box in the target region. Specifically, a value as shown in FIG. 22 is specified for font_style. That is, when the font style is Normal (a font style set as a standard in advance), 0x00 is designated as font_style. When the font style is Bold (bold), 0x01 is specified for font_style. When the font style is Italic (0), 0x02 is specified for font_style. When the font style is Bold and Italic (bold and italic), 0x03 is specified for font_style. When the font style is Outline-bordered (outline), 0x04 is specified for font_style. When the font style is Bold and Outline-bordered (bold and outline), 0x05 is specified for font_style. When the font style is Italic and outline-bordered (italic and outline), 0x06 is specified for font_style. When the font style is Bold, Italic and Outline-bordered (bold, italic and outline), 0x07 is specified for font_style.

  Of the font styles described above, the font style specified by 0x04 to 0x07 is one of the features of the present invention, which is “adding an outline (outline) to a character object used in text constituting subtitles”. This is the font style necessary to realize In other words, in order to realize one of the features of the present invention “to add an outline to a character object used in text constituting subtitles etc.”, the value of font_style is specified as one of 0x04 to 0x07 Need to be.

  Hereinafter, font styles in which 0x00 to 0x03 are specified as font_style are collectively referred to as normal font styles. Font styles in which 0x04 to 0x07 are specified as font_style are collectively referred to as outline styles.

  The 8-bit field of font_size specifies the font size of the text displayed in the text box in the target region. The font_palette_entry_id_ref field specifies the font color.

  In the dialog_style_set syntax in the examples of FIGS. 16 and 17, when any of 0x04 to 0x07 is specified as font_style, that is, one of the features of the present invention is “a character object used in subtitles etc. When an outline style is specified to realize “Apply an outline to”, an 8-bit field called outline_palette_entry_id_ref and an 8-bit field called outline_size are specified.

  outline_palette_entry_id_ref specifies the color of the outline (the outline of the text) when the text is displayed in a font style with an outline. outline_size specifies the size (width) of the outline. The outline color and size will be described later with reference to FIGS.

  In order to partially change font_style to outline style in inline_style, the gray items in FIG. 23 are changed from Table 9-59 (Data_type definition) of the conventional Blu-Ray Disc Read-Only Format Version0.89r3. In the added table, that is, the item (row) whose Data_type is 0x033, it is necessary to adopt a table in which Data_Length is changed to 3, and outline_palette_entry_id_ref and outline_size are newly added to inline_style_values () or text_string.

  The syntax of user_style change setting (hereinafter referred to as user_changeable_Style_set) is shown in FIG. 17 with respect to the syntax of region_style described above in the syntax of dialog_style_set in the examples of FIGS. 16 and 17.

  In FIG. 17, the 8-bit field of user_style_id specifies the identifier of the target User_control_style.

  A 1-bit field of region_horizontal_position_direction specifies the moving direction of region_horizontal_position. Specifically, 0 is specified in the region_horizontal_position_direction when the moving direction is the right direction, and 1 is specified when the moving direction is the left direction. The 15-bit field of region_horizontal_position_delta specifies the horizontal movement amount of region_horizontal_position.

  A 1-bit field of region_vertical_position_direction designates the progress (movement) direction of region_vertical_position. Specifically, 0 is designated in the region_vertical_position_direction when the traveling direction is downward, and 1 is designated when the traveling direction is upward. The 15-bit field of region_vertical_position_delta specifies the vertical movement amount of region_vertical_position.

  The 1-bit field of font_size_inc_dec designates the direction of change of the font size, that is, whether the size is increased or decreased after the change. Specifically, 0b is specified for font_size_inc_dec when it becomes large, and 1b when it becomes small. The 7-bit field of font_size_delta specifies the amount of font size change.

  A 1-bit field of text_box_horizontal_position_direction specifies the horizontal movement direction of the text box. Specifically, 0 is specified in the text_box_horizontal_position_direction when the moving direction is the right direction, and 1 is specified when the moving direction is the left direction. The 15-bit field of text_box_horizontal_position_delta specifies the amount of horizontal movement of the text box.

  A 1-bit field of text_box_vertical_position_direction specifies the vertical movement direction of the text box. Specifically, 0 is specified in the text_box_vertical_position_direction when the moving direction is downward, and 1 is specified when the moving direction is upward. The 15-bit field of text_box_vertical_position_delta specifies the amount of movement of the text box in the vertical direction.

  The 1-bit field of text_box_width_inc_dec specifies the direction of changing the width of the text box, that is, whether the width becomes thicker or narrower after the change. Specifically, 0b is specified for text_box_width_inc_dec when it becomes thick and 1b when it becomes narrow. The 15-bit field of text_box_width_delta specifies the amount of change in the width of the text box.

  The 1-bit field of text_box_height_inc_dec specifies the direction of change of the height of the text box, that is, whether it becomes higher or lower after the change. Specifically, 0b is specified for text_box_height_inc_dec when it is high, and 1b is specified when it is low. The 15-bit field of text_box_height_delta specifies the amount of change in the height of the text box.

  The 1-bit field of line_space_inc_dec specifies the direction of change of line_space, that is, whether the line_space_inc_dec increases or decreases after the change. Specifically, 0b is designated as line_space_inc_dec when increasing, and 1b when decreasing. A 7-bit field called line_space_delta specifies the amount of change of line_space.

  Although not shown, palette () is composed of the following fields. That is, length specifying the length of the palette (), palette_entry_id specifying the specific color identifier of the palette, Y_value specifying the Y value of (Y, Cb, Cr), (Y, Cb, Cr ) Of Cb_value that specifies the value of Cb in (), Cr_value that specifies the value of Cr in (Y, Cb, Cr), and T_value that specifies the transparency.

  Next, FIG. 24 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 which is an area for storing a downloaded text subtitle file (text subtitle file), and a font file storage unit 54 which is an area for storing a downloaded font file. Can be provided. 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 under 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.

  Note that 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. 24 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. 25 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 the 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 style data, such as a bitmap The data is converted (rasterized) into raster data (character object data) 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. 26 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) data to the attribute data buffer 123.

  The text subtitle file here refers to the text subtitle stream file shown in FIG. 10 described above, for example. Therefore, the character object refers to, for example, the above-described Dialog presentation Segment in FIG. The attribute data referred to here refers to, for example, the above-described Dialog Style Segment in FIG. 10 and the like. Specifically, for example, the font_style and outline fonts shown in FIG. The outline_palette_entry_id_ref in which the outline color in the attached font style is specified, and the outline_size in which the size (width) of the outline in the font style with the outline is specified.

  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 User_control_style () (FIG. 17) of the attribute data stored in the attribute data buffer 123 is changed under the control of the control unit 81.

  The font rasterizer 124 converts the character object read from the character object buffer 122 into a bitmap or the like based on the designation of the attribute read from the attribute data buffer 123 and the font style data supplied from the buffer 84 or the storage data acquisition unit 91. It is converted into raster data (character object data) and output to the caption graphics plane processing unit 93. Furthermore, the font rasterizer 124 detects a character object to which a bookmark is attached based on the attribute read from the attribute data buffer 123, and uses the bookmark buffer 125 to perform a character object to which the same bookmark ID is assigned. As for, do not perform rasterization redundantly. Details of the font rasterizer 124 will be described later with reference to FIG.

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

  FIG. 27 is a block diagram for explaining the detailed configuration of the font rasterizer 124.

  The character object acquisition unit 151 acquires the character object read from the character object buffer 122 (FIG. 26) and supplies it to the bookmark detection unit 152.

  The bookmark detection unit 152 determines whether or not the character object supplied from the character object acquisition unit 151 has already been bookmarked and stored in the bookmark buffer 125 (FIG. 26), that is, the same bookmark ID is assigned. It is detected whether or not a character object is already stored in the bookmark buffer 125.

  When the bookmark detection unit 152 detects that a character object to which the same bookmark ID is assigned is stored in the bookmark buffer 125, the bookmark detection unit 152 performs a character object to which the same bookmark ID is assigned (already rasterized). Data) is acquired from the bookmark buffer 125 and output to the subtitle graphics plane processing unit 93 (FIG. 25).

  On the other hand, when the bookmark detection unit 152 detects that a character object to which the same bookmark ID is assigned is not yet stored in the bookmark buffer 125, the bookmark detection unit 152 selects the character object supplied from the character object acquisition unit 151. It is supplied to the rasterizing unit 153 as it is.

  The rasterizing unit 153 specifies the attribute read from the attribute data buffer 123, the normal font style font style data supplied from the normal font style acquisition unit 156, or the outline style font supplied from the outline style processing unit 157. Based on the style data, the character object supplied from the bookmark detection unit 152 is converted into raster data (character object data) such as a bitmap and output to the caption graphics plane processing unit 93, and the bookmark storage control unit 154. To supply.

  The combining unit 164 provided in the rasterizing unit 153 will be described later.

  Although details will be described later with reference to FIGS. 28 to 31, the outline style font style data supplied from the outline style processing unit 157 is the color and size of the outline with respect to the original font style data. (Width) is font style data changed (processed) as necessary.

  The bookmark storage control unit 154 determines whether or not a new bookmark is described based on the attribute data of the character object supplied from the rasterizing unit 153. If the bookmark is described, the bookmark storage control unit 154 converts the raster data to the bookmark data. Control to be stored in the buffer 125 is performed, and when a bookmark is not described, the control is prohibited.

  The font style detection unit 155 refers to the corresponding font_style in the attribute data stored in the attribute data buffer 123, and determines the font style necessary for rasterizing the character object acquired by the character object acquisition unit 151. To detect. When the font style detection unit 155 detects that the font style is the normal font style, the font style detection unit 155 notifies the normal font style acquisition unit 156 of the detection result. On the other hand, when the font style detection unit 155 detects that the font style is an outline style, the font style detection unit 155 notifies the outline style acquisition unit 161 of the outline style processing unit 157 of the detection result.

  The normal font style acquisition unit 156 acquires the font style data of the normal font style specified by the detection result of the font style detection unit 155 among the font style data supplied from the buffer 84 or the storage data acquisition unit 91, This is supplied to the rasterizing unit 153.

  The outline style processing unit 157 receives the font style specified by the detection result of the font style detection unit 155 out of the font style data supplied from the buffer 84 or the storage data acquisition unit 91, that is, the font style data of the outline style. get. Further, the outline style processing unit 157 refers to the corresponding outline_palette_entry_id_ref among the attribute data stored in the attribute data buffer 123, and updates the outline color. The outline style processing unit 157 refers to the corresponding outline_size in the attribute data stored in the attribute data buffer 123 and updates the size (width) of the outline. Then, the outline style processing unit 157 supplies the font style data whose outline color and size (width) are updated to the rasterization unit 153 (more precisely, a synthesis unit 164 described later).

  Here, before describing a detailed configuration example of the outline style processing unit 157, an example of a method for changing the size (width) of the outline will be described with reference to FIGS. Needless to say, the outline size (width) changing method is not limited to the following example.

  FIG. 28 shows an alphabet A as an example of character object data in the normal font style. Hereinafter, the character object data A of the normal font style is referred to as character object data 171.

  In FIG. 29, alphabet A is shown as an example of outline-style character object data. Hereinafter, the A character object data in the outline style is referred to as character object data 181.

  The character object data 181 is generated based on the outline data. Outline data is one of font style data in which the shape of a character is expressed as an outline (outline). This outline data was used in outline fonts. That is, the outline font is one of the existing font formats, and is a format that retains outline data and performs lettering. Outline fonts are characterized by being more resistant to enlargement and reduction than bitmap fonts (a format that holds bitmaps).

  FIG. 30 is a diagram for explaining a conventional technique among the changing techniques for changing the outline (contour) width of the character object data 181.

  As shown in FIG. 30, conventionally, the outline 181-L0 of the character object data 181 is expanded / contracted in an equal proportion in both directions perpendicular to the outline (in the example of FIG. The left direction and the right direction of the direction are stretched), and as a result, it is changed to an outline 181-L1.

  In other words, conventionally, the width of the outline of the character object data 181 is increased at an equal rate in both directions perpendicular to the outline, and as a result, the character object data 181 is changed to the character object data 182 as shown in FIG. Is done.

  As can be easily understood by comparing the character object data 182 with the original character object data 181, if the width of the outline is increased in an equal proportion in both directions perpendicular to the outline, the outline The conventional method has a problem that the area of the white region (outlined portion) surrounded by the size is reduced by that amount, and the worst white region is erased (outlined portion is crushed) .

  Therefore, in order to solve the problem of this conventional method, in this embodiment, the size (width) of the outline of the character object data 181 is made variable by adopting the method shown in FIG. Yes. That is, FIG. 31 is a diagram for explaining an example of a change method that can solve the problem of the conventional method among the change methods of the size (width) of the outline. In other words, in the present embodiment, the method of FIG. 31 is applied to the combining unit 164 (FIG. 27) of the rasterizing unit 153.

  Hereinafter, the method of FIG. 31 will be further described. In other words, the operation (processing) of the synthesis unit 164 will be described below.

  First, the composition unit 164 generates character object data 181 based on the outline data. Next, the synthesizing unit 164 changes the character object data 182 in which the width of the outline of the character object data 181 is changed at an equal ratio in both directions perpendicular to the outline in accordance with the conventional method described in FIG. Generate.

  The synthesizing unit 164 uses the font style data with the outline supplied from the outline style processing unit 157 in order to generate the character object data 182. However, the font style data with this outline will be described later.

  Next, the composition unit 164 superimposes the character object data 181 on the character object data 182 (executes composition processing). As a result, if the outline of the character object data 181 is referred to as a center line, only the direction (hereinafter referred to as the outer direction) opposite to the direction toward the white portion (hereinafter referred to as the inner direction) with respect to the center line. Character object data 183 having a thick outline, that is, character object data 183 in which only the outline width is increased outward without changing the area of the white portion of the character object data 181 is generated. .

  By the way, as described above, the composition unit 164 uses the font style data of the outline style supplied from the outline style processing unit 157 in order to generate the character object data 182. The character object data 182 has a width (inward direction and outward direction) with respect to the outline of the character object data 181 generated from the outline data (outline style font style data used in the conventional outline font). Both) and the outline has changed color. Therefore, the outline style processing unit 157 needs to change the outline data necessary for generating the character object data 181 to font style data necessary for generating the character object 182. Therefore, in the present embodiment, the outline style processing unit 157 is configured as shown in FIG. That is, in the example of FIG. 27, the outline style processing unit 157 includes an outline style acquisition unit 161, a color change unit 162, and a both width change unit 163.

  The outline style acquisition unit 161 includes the font style specified by the detection result of the font style detection unit 155 among the font style data supplied from the buffer 84 or the storage data acquisition unit 91, that is, the font style data of the outline style ( Outline data). The obtained font style data of the outline style is provided to the color changing unit 162.

  The color changing unit 162 refers to the corresponding outline_palette_entry_id_ref among the attribute data stored in the attribute data buffer 123, and sets the outline color for the outline style font style data supplied from the outline style acquiring unit 161. change. The font style data of the outline style whose outline color has been changed is supplied to the both-width changing unit 163 and the synthesizing unit 164 of the rasterizing unit 153.

  That is, for example, in the example of FIG. 31, the synthesizing unit 164 generates character font data 181 having a color outline corresponding to the font style data based on the font style data supplied from the color changing unit 162. Become.

  The width changing unit 163 refers to the corresponding outline_size of the attribute data stored in the attribute data buffer 123, and the font size data of the outline style supplied from the color changing unit 162 is the size of the outline ( The width is expanded and contracted at an equal rate in both the outer and inner directions. Outline style font style data in which the size (width) of the outline has been changed in both the outer direction and the inner direction is supplied from the both width changing unit 163 to the combining unit 164.

  Then, the synthesizing unit 164 executes the process according to the conventional method of FIG. 30 described above based on the font style data supplied from the both width changing unit 163. Specifically, for example, when the character object data 181 of FIG. 31 has already been generated, the composition unit 164 sets the width of the outline of the character object 181 based on the font style data supplied from the both width change unit 163. On the other hand, character object data 182 having an outline with a width expanded and contracted at the same rate in both the outer direction and the inner direction (and the color is changed) is generated.

  Then, as described above, the combining unit 164 combines the character object data 181 and the character object data 182 so that only the outer direction of the outline width of the character object 181 is expanded or contracted. Character object data 183 having an outline (and color is changed) is generated.

  Next, with reference to FIG. 32, the reproduction process of the controller 21 (FIG. 1) will be described.

  In the state where the update file downloaded as described above is recorded in the local storage 24 and the reproduction of the content recorded on the optical disc 11 is instructed, in step S1, 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 S2, 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 the directory in which the name including Studio_id and Content_id is set in the local storage 24 (FIG. 5).

  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 S3, 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. 5 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 S4, the reproduction control unit 37 designates and executes a navigation program from the supplied first virtual file system. Therefore, as shown in FIG. 6, 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 S5, the playback control unit 37 acquires the PlayList and SubPlayItem specified by the navigation program as playback sections, and proceeds to step S6 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 disk directory management unit 35 according to the file system of FIG. 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 S7, a content reproduction process, which will be described later with reference to FIG. 33, is executed, the read AV stream file, text subtitle stream file (text subtitle stream file), etc. are decoded, and video, audio, or subtitles are displayed from the display device. Is output and the process 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 executed in step S7 in FIG. 32 will be described with reference to the flowchart in FIG.

  In step S21, the playback control unit 37 (FIG. 4) controls the decoder 26 to play back the AV stream data specified by PlayItem.

  In step S <b> 22, 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 S22 that an operation input commanding subtitle data display has not been received, the process proceeds to step S28 described later.

  If it is determined in step S22 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 S23. . The menu screen display control unit 31 displays a list menu of subtitle data that can be displayed on the display device.

  In step S24, the operation input acquisition unit 32 determines whether or not an operation input specifying the language of the caption data to be displayed has been received. If it is determined in step S24 that an operation input specifying the language of the caption data to be displayed has not been received, the process returns to step S23, and the subsequent processes are repeated.

  If it is determined in step S24 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 37 in step S25. . 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 style data corresponding to the font (outline font or the like) designated by the user is read out and supplied to the storage data acquisition unit 91 of the decoder 26 as necessary.

  In step S26, the decoder 26 executes a caption display process which will be described later with reference to FIGS.

  In step S <b> 27, the operation input acquisition unit 32 determines whether an operation input for instructing a change in the language of the caption data to be displayed has been received. If it is determined in step S27 that an operation input for instructing to change the language of the caption data to be displayed is received, the process returns to step S25, and the subsequent processes are repeated.

  In step S22, when it is determined that the operation input for instructing the display of the caption data is not received, or in step S27, it is determined that the operation input for instructing the change of the language of the caption data to be displayed is not received. In this case, in step S28, the operation input acquisition unit 32 determines whether an operation input for instructing the end of the reproduction of the content has been received or whether the AV stream data being reproduced has ended.

  If it is determined in step S28 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 S29 It is determined whether or not an operation input for stopping the display has been received.

  If it is determined in step S29 that an operation input for stopping the display of subtitles has not been received, the process returns to step S26, and the subsequent processes are repeated. If it is determined in step S29 that an operation input for stopping the display of subtitles has been received, the process returns to step S21, and the subsequent processes are repeated.

  If it is determined in step S28 that an operation input commanding the end of content playback has been received or it is determined that the AV stream data being played back has ended, the processing is ended.

  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 content videos. 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 executed in step S26 of FIG. 33 will be described with reference to the flowcharts of FIGS.

  In step S51, the text data decoder 121 (FIG. 26) of the text subtitle processing unit 92 of the decoder 26 (FIG. 25) decodes the text subtitle data acquired by the storage data acquisition unit 91.

  In step S52, the text data decoder 121 supplies the character object included in the decoded text subtitle data to the character object buffer 122, so that the character object is buffered in the character object buffer 122.

  In step S53, the text data decoder 121 supplies attribute data such as font style (font_style), outline color (outline_palette_entry_id_ref) and size (outline_size) included in the decoded text subtitle data to the attribute data buffer 123. The attribute data is buffered in the attribute data buffer 123.

  In step S54, the font style detector 155 (FIG. 27) of the font rasterizer 124 determines whether or not the font style buffered in the process of step S53 is an outline style.

  If it is determined in step S54 that it is not an outline style, that is, if it is determined that it is a normal font style, in step S55, the normal font style acquisition unit 156 acquires font style data of the normal font style.

  On the other hand, when it is determined in step S54 that the outline style is set, in step S56, the outline style processing unit 157 acquires font style data of the outline style. In step S57, the outline style processing unit 157 updates the font style data of the outline style based on the attribute data such as the size and color of the outline buffered in the process of step S53. That is, outline style font style data in which the outline color and width are changed is generated.

  When the font style data of the normal font style is acquired in the process of step S55, or the font style data of the outline style acquired in the process of step S56 is updated in the process of step S57, the process is as shown in FIG. Proceed to step S58.

  In step S <b> 58, the character object acquisition unit 151 acquires a character object from the character object buffer 122 (FIG. 26) and supplies it to the bookmark detection unit 152.

  In step S <b> 59, the rasterizing unit 153 acquires font style data from the normal font style acquiring unit 156 or the outline style processing unit 157.

  In step S60, the bookmark detection unit 152 refers to the attributes buffered in the process of step S53 (FIG. 34) and the bookmark buffer 125, and the caption data to be rasterized (the character object acquired in the process of step S58). It is determined whether or not the subtitle data corresponding to (2) is bookmarked and has already been buffered in the bookmark buffer 125.

  If it is determined in step S60 that the subtitle data is bookmarked and buffered, in step S61, the bookmark detection unit 152 stores the subtitle image data (raster data) to be bookmarked from the bookmark buffer 125. ) Is output. Thereby, a process progresses to step S65.

  On the other hand, if it is determined in step S60 that the caption data is not already bookmarked, the character object acquired in the process of step S58 is supplied from the bookmark detection unit 152 to the rasterization unit 153. Thereby, a process progresses to step S62.

  In step S62, the rasterizing unit 153 obtains the character object acquired in the process of step S58, the font style acquired in the process of step S55 or S56 of FIG. 34 (further updated in the process of step S57 as necessary). Rasterization is executed based on the data and the attribute data buffered in step S53 in FIG. 34, and the raster data (character object data) as the execution result is converted into a caption graphics plane processing unit 93 (FIG. 25) and supplied to the bookmark storage control unit 154. 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 S63, the bookmark storage control unit 154 stores a new bookmark in the attribute data based on the attribute data of the caption data (character object data that is raster data) rasterized in the process of step S62. Determine whether or not.

  If it is determined in step S63 that a bookmark is described, the bookmark storage control unit 154 stores the rasterized subtitle image data (raster data) in the bookmark buffer 125 in step S64.

  When it is determined in step S63 that the bookmark is not described after the process of step S62 is completed, or when the process of step S61 is completed, the synthesis processing unit 94 (FIG. 25) supplies the data in step S65. The subtitle image data is combined with video data and output. Thereby, the caption display process which is the process of step S26 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.

  Therefore, when the currently played frame is, for example, a frame in which the color of the subtitle is the same as or similar to the color of the video, that is, from the user's perspective, the subtitle is integrated with the video. In such a case, the user can specify the desired outline style, and the text constituting the subtitle is displayed in the desired outline style, so that the subtitle can be reliably determined. .

  By the way, the series of processes described above can 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 storage medium.

  As shown in FIG. 1, the program storage medium includes a magnetic disk (including a flexible disk) on which a program is recorded, an optical disk (CD-ROM) distributed to provide a program to a user separately from a computer. (Including Compact Disk-Read Only Memory), DVD (Digital Versatile Disk), magneto-optical disk (including MD (Mini-Disk) (trademark)), or removable medium 28 made of semiconductor memory, etc. Instead, it is configured by a memory 23 such as a ROM or a RAM in which a program is recorded and a local storage 24 such as a hard disk, which are provided to the user in a state of being incorporated in the apparatus main body in advance.

  In addition, in this specification, the step of describing the program recorded in the program storage medium is not limited to the processing performed in time series according to the described order, but is not necessarily performed in time series. 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, 151 Character object acquisition unit, 152 Bookmark detection unit, 153 Rasterization unit, 154 Bookmark storage control unit, 155 Font style detection unit, 156 Normal font style acquisition unit, 157 Outline style processing unit, 161 Outline style acquisition unit, 162 color Changing part, 163 Both width changing part, 164 Compositing part

Claims (3)

In a playback device that generates caption data for displaying captions corresponding to a predetermined AV stream,
Character object holding means for holding a character object for displaying the subtitle;
First position information indicating a horizontal position of the text box in which the subtitle is displayed, second position information indicating a vertical position of the text box, and an outline as a font style applied to the character object Font style specification information that can specify at least a font style, and when the font style with the outline is specified in the font style specification information, the outline width of the character object corresponding to the font style with the outline Attribute data holding means for holding attribute designation data including at least width designation information capable of designating a user-selectable style set;
When the font style with the outline is designated in the font style designation information held by the attribute data holding means, the character object held by the character object holding means is designated by the width designation information. Conversion means for converting into font-style subtitle data with a wide outline.
The style set includes first movement amount information indicating a horizontal movement amount of the text box position, and second movement amount information indicating a vertical movement amount of the text box position,
The converting means places the subtitle in the text box whose position is updated based on the first movement amount information and the second movement amount information included in the style set according to user selection. A playback device that converts the subtitle data to display the subtitle data. In a playback method of a playback device for generating caption data for displaying captions corresponding to a predetermined AV stream,
Hold the character object for displaying the subtitles in the character object holding means,
First position information indicating a horizontal position of the text box in which the subtitle is displayed, second position information indicating a vertical position of the text box, and an outline as a font style applied to the character object Font style specification information that can specify at least a font style, and when the font style with the outline is specified in the font style specification information, the outline width of the character object corresponding to the font style with the outline Attribute data containing at least the width designation information that can be designated and the user-selectable style set is held in the attribute data holding means,
When the font style with the outline is designated in the font style designation information held by the attribute data holding means, the character object held by the character object holding means is designated by the width designation information. Including converting to font-style subtitle data with a wide outline
The style set includes first movement amount information indicating a horizontal movement amount of the text box position, and second movement amount information indicating a vertical movement amount of the text box position,
In the conversion of the character object into the caption data, the position of the character object is updated based on the first movement amount information and the second movement amount information included in the style set according to user selection. A reproduction method performed by converting the subtitle data to be displayed in the text box. A predetermined AV stream;
A character object for displaying subtitles corresponding to the AV stream;
First position information indicating a horizontal position of the text box in which the subtitle is displayed, second position information indicating a vertical position of the text box, and an outline as a font style applied to the character object Font style specification information that can specify at least a font style, and when the font style with the outline is specified in the font style specification information, the outline width of the character object corresponding to the font style with the outline Width designating information that can designate a user, and a user-selectable style set that includes first movement amount information indicating a horizontal movement amount of the text box position, and a vertical direction of the text box position. The second shift indicating the amount of movement A recording medium in which the attribute data is recorded at least including the style set comprises an amount information,
In a playback device for playing back the recording medium,
The character object read from the recording medium is held in a character object holding means,
The attribute data read from the recording medium is held in the attribute data holding means,
When the font style with the outline is designated in the font style designation information included in the attribute data held in the attribute data holding unit, the character object held in the character object holding unit is The first moving amount information and the second moving amount information included in the style set according to a user selection, which is the subtitle data of the font style with the outline of the width specified by the width specifying information. A recording medium that is converted into the caption data for displaying the caption in the text box whose position is updated based on the recording medium.

Images