CN1950903B - Method and device for reproducing text subtitle data - Google Patents

Abstract

A recording area of the exemplary recording medium stores a text subtitle stream including a dialog style segment and at least one dialog presentation segment associated with the dialog style segment. The dialog style segment includes at least one set of style information. Each set of style information provides region location information for locating a region in the image and text box location information for locating a text box in the region. The dialog presentation segment includes at least one region subtitle information. The region subtitle information includes text subtitle data (e.g., style data and/or text string data) and a region style identifier, and the region style identifier identifies one of a set of style information in a dialog style segment to apply to the text subtitle data.

Description

Method and device for reproducing text subtitle data

technical field

The present invention relates to a recording medium and a method and apparatus for recording and reproducing the recording medium. the

Background technique

Optical discs have been widely used as optical recording media for recording large amounts of data. Recently, a blu-ray disc (BD) has been introduced as a high-density digital video disc (HD-DVD) for recording many hours of high-definition video data and audio data of excellent sound quality. the

BD has become the focus of next-generation HD-DVD as a next-generation optical recording solution to store more data than traditional DVD. BD's standardized technical specifications are under development. the

Therefore, based on the specification of the BD, an optical recording apparatus for the BD has been developed. However, there are many difficulties in developing optical recording apparatuses for BDs because the technical specifications of BDs have not been completely standardized. the

In order to efficiently reproduce data recorded in the BD and/or for user convenience, a lot of auxiliary data (AUX data) such as text subtitle information may be simultaneously provided along with the main AV data. Also, information must be efficiently managed to reproduce main AV data and sub or auxiliary data. the

However, a unified standard of auxiliary data such as text subtitles has not been fully provided. Therefore, there are many obstacles in developing an optical recording device for BD. the

Contents of the invention

The present invention relates in part to a recording medium having a data structure for managing reproduction of text subtitle data. the

In one embodiment, a recording area of an exemplary recording medium stores a text subtitle stream, and the text subtitle stream includes dialogue style segments and at least one dialogue display segment associated with the dialogue style segments. The dialog style fragment includes a minimum set of style information. Each set of style information provides region positioning information for positioning a region in the image and text box positioning information for positioning a text box in the region. The dialog display segment includes at least one region subtitle information. The region subtitle information includes text subtitle data (e.g., style data and/or text string data) and a region style identifier, and the region style identifier identifies one of the groups of style information in the dialog style segment to be applied to the text subtitle data . the

The region positioning information may provide the horizontal position and the vertical position of the upper left corner of the region in the image. the

In one embodiment, each set of style information may further include area size information (indicating the height of the area and the width of the area) or an indicator of the background color of the area. the

In one embodiment, each set of style information includes user changeable information indicating the horizontal direction of the user movable area and the vertical direction of the user movable area. the

In another embodiment, the text box positioning information provides the horizontal position and the vertical position of the upper left corner of the text box in the region. the

Likewise, in a further embodiment, each set of style information may further include text box size information indicating the height of the text box and the width of the text box, text scrolling information indicating the character progression of the text subtitle data used in the text box, indicating Text arrangement information how to arrange text subtitle data in a text box, line spacing information indicating a space between lines of text subtitle data in a text box, identification of a font file recorded on a recording medium for reproducing text subtitle data in a text box font identifier for the text subtitle data in the text box, font glyph indicator indicating the font glyph used for the text subtitle data in the text box, font size information indicating the font size for the text subtitle data in the text box, indicating the text used in the text box Font color information of the color of subtitle data. the

In this embodiment, each set of style information may include user changeable information indicating the horizontal direction of the user movable area, the vertical direction of the user movable area, whether the user can increase or decrease the font size, the user movable text box the horizontal direction of the text box, the vertical direction the user can move the text box, whether the user can increase or decrease the height of the text box, the user can increase or decrease the width of the text box, or the user can increase or decrease the text box Spacing between rows of Chinese subtitle data. the

In yet another embodiment of the present invention, the recording area of the recording medium stores a text subtitle stream, and the text subtitle stream includes at least one set of style information and text subtitle data related to one of the plurality of sets of style information. Each set of style information provides region positioning information for locating a region in an image, and a region background color indicator. the

The invention also relates in part to methods and apparatus related to said recording medium. the

In one embodiment of the method for recording a data structure for managing text subtitle data on a recording medium according to the present invention, a text subtitle stream is recorded on the recording medium. The text subtitle stream includes a dialogue style segment and at least one dialogue visualization segment associated with the dialogue style segment. A dialog style segment includes at least one set of style information. Each set of style information provides region positioning information for positioning a region in the image and text box positioning information for positioning a text box in the region. The dialog display segment includes at least one region subtitle information. The region subtitle information includes text subtitle data (eg, style data and/or text string data) and a region style identifier that identifies one of sets of style information for a dialogue style section of the text subtitle data. the

In another embodiment, the apparatus for decoding text subtitle data includes a subtitle decoding unit that decodes a text subtitle stream, and the related method includes decoding the text subtitle stream. The text subtitle stream includes a dialogue style segment and at least one dialogue visualization segment associated with the dialogue style segment. A dialog style segment includes at least one set of style information. Each set of style information provides region positioning information for positioning a region in the image and text box positioning information for positioning a text box in the region. The dialog display segment includes at least one region subtitle information. The region subtitle information includes text subtitle data (eg, style data and/or text string data) and a region style identifier that identifies one of sets of style information for a dialogue style section of the text subtitle data. the

In yet another embodiment, the apparatus for decoding text subtitle data includes a subtitle decoding unit that decodes a text subtitle stream, and the related method includes decoding the text subtitle stream. The text subtitle stream includes at least one set of style information and text subtitle data associated with one of the plurality of sets of style information. Each set of style information provides area positioning information for positioning the area in the image and text box positioning information for positioning the text box in the area, and an area background color indicator. the

Description of drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description explain the principles of the invention. In the picture:

Fig. 1 shows the file structure of the high-density optical disc according to an exemplary embodiment of the present invention;

Fig. 2 shows the composition of the file structure and related information recorded in the high-density optical disc according to an exemplary embodiment of the present invention;

Figure 3 shows the text subtitle stream displayed simultaneously with the main AV stream in a single video frame;

Fig. 4 is the view showing the file structure with file information, is used to clarify the method for managing text subtitle reproduction according to an exemplary embodiment of the present invention;

Figures 5A to 5C show the reproduced main AV stream with relevant subtitles displayed on the display, for explaining the management information recorded in the text subtitle stream;

Fig. 6 shows the text subtitle stream file structure according to an exemplary embodiment of the present invention;

Fig. 7 shows a dialog style unit (DSU) and a dialog display unit (DPU) included in a text subtitle stream according to an exemplary embodiment of the present invention;

Fig. 8 and Fig. 9 have shown the syntax of the text subtitle stream according to an exemplary embodiment of the present invention;

10A to 12C show the syntax of the dialog style unit in the text subtitle stream according to the first embodiment of the present invention;

Fig. 13 A and 13B have shown the syntax of the dialog style unit in the text subtitle stream according to the second embodiment of the present invention;

14A to 14G show the syntax of the dialog style unit in the text subtitle stream according to the first embodiment of the present invention;

Figure 15 shows the data structure recorded in the text subtitle stream according to an exemplary embodiment of the present invention;

Fig. 16 shows the decoding unit of the optical disc reproducing device with text subtitle stream according to an exemplary embodiment of the present invention;

Figure 17 shows a text subtitle stream decoder according to an exemplary embodiment of the present invention; and

FIG. 18 illustrates a method of reproducing a text subtitle stream according to an exemplary embodiment of the present invention. the

Detailed ways

Reference will now be made in detail to the exemplary embodiments of the invention illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. the

In the present invention, main data is title information recorded in an optical disc, including video and audio data, provided to users by the author of the disc. Generally, video and audio data are recorded based on the MPEG2 format, and are called main AV stream or main data. the

The auxiliary data represents data related to the main data, and is provided to the user to reproduce the main data conveniently. Ancillary data includes subtitle information, interactive graphics streams, visual graphics streams, sound information and additional audio data with browsable slide shows. According to the characteristics of the auxiliary data, the auxiliary data is recorded based on the MPEG2 format by multiplexing with the main AV stream, or the auxiliary data is recorded based on MPEG2 or other suitable formats as a stream file independent of the main AV stream. the

Subtitles as auxiliary data are usually closed titles displayed on a predetermined area of a display together with video images produced by reproducing main AV data. When the user wishes to reproduce the main AV data with subtitles in a desired language, the language of the subtitles is displayed together with the video image in an area of the display by selecting the language of the subtitles among the subtitles in multiple languages provided by the optical disc. Therefore, it is possible to provide subtitles in various formats. In particular, subtitles recorded as text data are text subtitles. the

Next, with reference to FIGS. 1 and 2, the recording format of main data and auxiliary data including text subtitle data recorded in the optical disc, and the file structure for managing the main data and auxiliary data will be explained in detail. the

FIG. 1 shows a file structure for managing various data on a disc according to an exemplary embodiment of the present invention. As shown, at least one BD directory BDMV exists under one root directory. In the BD directory BDMV, an index file index.bdmv and an object file MovieObject.bdmv are included as general file (upper file) information to ensure interaction with the user. Also, the BD directory BDMV includes a playlist directory PLAYLIST, a clip information directory CLIPINF, a stream directory STREAM, and an auxiliary data directory AUXDATA. the

Files for video and audio streams called "main AV streams" are recorded in a disc in a specific format, while auxiliary streams such as text subtitles (hereinafter referred to as text subtitle streams) exist independently in the stream directory STREAM. Since text subtitle stream files and AV stream files are recorded in MPEG2 format (such as MPEG2 transport packets), '*.m2ts' is used as the extension of each stream file (for example, 01000.m2ts, 02000.m2ts, and 10001.m2ts) . Alternatively, for example, in the case of a text subtitle stream file, '*.txtst' may be used as the extension because the text subtitle stream has auxiliary data characteristics different from the main AV stream. the

In the BD specification, an AV stream may be called a clip stream file. In relation to the present invention, the text subtitle data will exist in the form of a file separate from the AV stream file. For example, in FIG. 1, text subtitle data exists as a text subtitle stream file 10001.m2ts or 10001.txtst. the

The clip information directory CLIPINF includes clip information files *.clpi, and each clip information file corresponds to a stream file one by one. The clip information file *.clpi has attribute information and timing information of a corresponding stream file, and is used as a management file. More specifically, the information in the ClipInfo file includes mapping information such that the presentation time stamp (PTS) is mapped to the Source Packet Number (SPN) of the source packet in the corresponding Stream file. This map is called an entry point map or "EP_MAP". the

Stream files and corresponding clip information files may be collectively referred to as "clips." Therefore, the file "01000.clpi" in the clip information directory CLIPINF has the attribute information and timing information of the file "01000.m2ts" in the stream directory STREAM, and "01000.clpi" and "01000.m2ts" constitute one clip. the

The playlist directory PLAYLIST includes playlist files *.mpls, and each playlist file has at least one play item PlayItem, indicating the playing interval of a certain clip. The play item PlayItem includes timing information on the playback start time In-Time and the playback end time Out-Time of a certain clip for playback, and identifies the clip by providing the clip information file name in the clip information file name field. Using the PTS information in the In-Time and Out-Time information, the EP mapping of the specified clip information file allows searching and obtaining the specific stream address or position (for example, SPN) of the corresponding stream file, so that the reproduction of the play item results in clip reproduction. the

The playlist file *.mpls is used as a base management file to play a desired clip by providing at least one play item PlayItem. Furthermore, the playlist file *.mpls may also provide a sub play item SubPlayItem for managing, for example, reproduction of supplementary data which may be reproduced synchronously or asynchronously (eg, a browsable slide show) with the play item PlayItem. For example, in the case of including a sub-play item for playing back text subtitles, the corresponding sub-play item and play item synchronously play back data. However, in case sub-playitems are included for playback of audio data of a browsable slideshow, the corresponding sub-playitems and playitems are not synchronized. the

In one embodiment of the present invention, auxiliary data including text subtitles are managed through, for example, SubPlayItems, which will be described in detail below. the

The auxiliary data directory AUXDATA is an area for separately recording auxiliary data files for playback. For example, to support more user-friendly playback, a sound file Sound.bmdv for providing a click sound, a font file *.font or *.otf used with text subtitle playback, etc. are recorded therein. the

Therefore, the text subtitle stream 10001.m2ts, as a kind of auxiliary data, can be recorded in the auxiliary data directory AUXDATA. the

In addition, in the above-mentioned BD directory BDMV, the index file index.bdmv and the object file MovieObject.bdmv exist as common files to ensure interaction with users. The index file index.bdmv has an index table that provides user-selectable menu information and title information. MovieObject.bdmv provides navigation commands, eg, executes a playlist, and can be invoked through selections made in the index table. the

Fig. 2 shows the file structure recorded in the optical disc and the format of related information. The optical disc includes a file system information area, a database area and a stream area. System information for managing files is recorded in the file system information area. In the database area, playlist files (*.m2ts) for reproducing recorded stream files (*m2ts), clip information files (*.clpi), index files (index.bdmv), and object files (MovieObject .bdmv). Also, main data and auxiliary data are recorded in the stream area. As mentioned earlier, primary data includes audio, video, and graphics data, while auxiliary data includes text subtitles. Also, auxiliary data is recorded separately from main data in the stream area as an independent file. That is, auxiliary data is recorded in the stream area without being multiplexed with main data. Accordingly, the user decides a method of reproducing the main data and the auxiliary data based on the information stored in the database area and the stream area. the

Next, the file structure of the text subtitle stream file will be described in detail. Also, a method of defining management information for reproducing text subtitles, a method of constructing a file structure of a text subtitle stream file including the defined management information, and a method and apparatus for reproducing a stream file will be described in detail. the

Fig. 3 shows a display that simultaneously displays the text subtitle stream and the main AV stream on one video frame. That is, it shows that text subtitles are displayed along with a single video frame generated by reproducing the main AV stream, and the text subtitles and the generated video frames are timely synchronized in time. the

FIG. 4 is a view of a file structure with file information for explaining a method of managing reproduction of text subtitles according to an exemplary embodiment of the present invention. Text subtitles are managed by subplayitems in a playlist, and one subplayitem manages reproduction of a plurality of text subtitle clips. the

As shown, a playlist file includes at least one or more playitems that manage reproduction of a main AV clip. In the case where one or more text subtitles are associated with the main AV data, the text subtitles are managed as subplayitems. For example, FIG. 4 shows English text subtitle clip 1 and Korean subtitle clip 2 in the playlist file, and shows that subtitle clip 1 and subtitle clip 2 are time-synchronized with the main AV data. That is, subtitle clips are displayed together with main AV data at the target presentation time. the

Therefore, management information on target presentation time, position and size of subtitles is provided for reproducing text subtitles. Next, management information used to reproduce text subtitles is explained in detail. the

5A to 5C show a reproduced main AV stream displayed on a display with associated text subtitles for explaining management information recorded in the text subtitle stream. FIG. 5A shows dialog information, FIG. 5B shows region information, and FIG. 5C shows style information. the

FIG. 5A shows dialog information of management information for managing reproduction of text subtitles. The dialog information is used to manage at least one or more text data at the time of presentation. the

That is, the presentation time is the time at which the corresponding subtitle is reproduced, expressed as PTS. Easily manage subtitle reproduction by limiting text subtitles displayed on the PTS to dialogue. the

For example, if text subtitles are displayed as two lines at PTS(k) and PTS(k+1), the text subtitles are limited to the same dialogue. In one embodiment, the text subtitle data in a dialog is less than 100 character codes. the

Fig. 5B shows area information in the management information. This field contains information about constructing dialogs at visualization time. Again, this region represents a region in a single video frame to which global style information is likewise applied. In one embodiment, a single dialog has at most two regions. That is, in this embodiment, dialogs can be constructed with a single or two regions. the

The reason for defining at most two regions in a single session is to adjust the decoding workload when text subtitles are reproduced. However, the number of regions may be limited to a maximum of n (n>=2) in other embodiments. the

Fig. 5C shows style information of management information. The style information is information on specifying a method for displaying text subtitles, and includes style information such as the position, size, and background color of the subtitles. Text alignment or text scrolling can be used as style information. the

In one embodiment of the present invention, style information is divided into global style information and local style information for displaying text subtitles in different ways. the

The global style information is style information applied equally to each area, and it includes the position of each area and the size of each area. This information is called the region style (region_style). FIG. 5C shows that two different region style information are applied to two regions (region#1 and #2). A region style of "position 1, size 1, color=blue" is applied to region 1 (region#1). A region style of "position 2, size 2, color=red" is applied to region 2 (region#2). the

The local style information is style information applied according to each text data line or each text data character in the region. This information may be referred to as an inline style "inline_style". That is, an inline style may be style information defined for text data when a region style is changed. the

For example, in FIG. 5C, "inline style information (inline_style)" is applied to area #1, and a different inline style is applied to "mountain" in the text data. the

Fig. 6 shows the text subtitle stream file structure. For example, FIG. 6 shows the structure of the text subtitle stream file "10001.m2ts" of FIG. 1 . the

In this embodiment, the text subtitle stream is structured as an MPEG2 transport stream. The transport stream includes a plurality of transport packets, and the same packet identifier (PID) is assigned to these transport packets (TP) such as "PID=0x18xx". Therefore, the optical disk reproducing method or apparatus effectively extracts the text subtitle stream from the input stream by extracting only the transport packets assigned with "PID=0x18xx". the

A single packet elementary stream (PES) consists of a plurality of transport packets TP. In this embodiment, each dialog forms a single PES, effectively reproducing the dialog. the

The first Packet Elementary Stream (PES) in the Text Subtitle Stream comprises a Dialogue Style Unit DSU (alternatively called a Dialogue Style Segment DSS) containing a set of Region Patterns. Also, each of the second and subsequent elementary streams of packets includes a dialog presentation unit DPU (alternatively called a dialog presentation segment DPS) containing the actual dialog information. the

Therefore, the dialog information defined in FIGS. 5A to 5C includes the DPU, and the style information of the dialog information includes inline style information (inline style) and link information (region_style_id) linked to one of various region styles defined in the DSU. the

In one embodiment, a dialog style unit includes a maximum number of region style groups. For example, a dialogue style unit includes a maximum of 60 region style groups, and they are distinguished by a unique region style identification (region_style_id) assigned to each region style group. the

FIG. 7 illustrates a dialog style unit (DSU) and a dialog presentation unit (DPU) included in a text subtitle stream according to an exemplary embodiment of the present invention. The syntax of the text subtitle stream will be described later with reference to FIG. 8 . the

In this embodiment, a dialogue style unit (DSU) includes a maximum of 60 region style groups and the region style groups are distinguished by region style identifiers (region_style_id). The regional style group includes various regional styles and user-variable style groups, and the regional style group is recorded according to the regional style identification. The syntax of the region style information and the user variable style group will be explained later with reference to FIG. 10A . the

The dialog display unit (DPU) includes text data and a PTS group, which is a group of display times for text data. The DPU also includes style information applied to each region. Therefore, the DSU includes region_style_id for linking region style information to a corresponding region. the

As shown in FIG. 7, DPU#1 includes dialog development information of a single area. Since DPU #1 includes region_style_id=k for linking DPU #1 to the corresponding region style group, the region style applied to text data #1 is region style group #k in the DPU. DPU#2 includes two areas. The first region of text data #1 points to region style group #k (Region_style_id=k). Also, since the region style link information of the region 2 of the DPU #2 is Region_style_id=n, the region style #n is applied to the text data #2 of the second region. Similarly, area style group #n and area style group #m are applied to DPU #3 and DPU #4, respectively. the

The style information linked by region_style_id is similarly applied to text data in the corresponding region as global style information. In case a text string in text data is changed according to specific style information, partial style information is applied to the corresponding text string. the

Next, the syntax of DSU and DPU will be explained. the

FIG. 8 shows the syntax of a text subtitle stream (Text_Subtitle_stream()) according to an exemplary embodiment. As shown in FIG. 8, the text subtitle stream (Text_Subtitle_stream()) includes a single DSU (dialog_style_unit()) defining a set of style information and a plurality of DPUs (dialog_presentation_unit()) including dialogue information. That is, the function Text_Subtitle_stream() includes the function dialog_style_unit() and the function dialog_presentation_unit(). A text subtitle stream is recorded with the function Text_Subtitle_stream( ), and the recorded text subtitle stream is constructed using a single DSU defined by the function dialog_style_unit( ) and a plurality of DPUs defined by the function dialog_presentation_unit( ). the

Fig. 9 shows the syntax of a dialogue style unit (DSU). As mentioned earlier, the DSU is defined by the function dialog_style_unit(), and Figure 9 shows the detailed structure of the function dialog_style_unit(). As shown in FIG. 9, the dialog_style_unit() includes the function dialog_styleset(). The function dialog_styleset() defines the set of style information corresponding to the dialog. Therefore, the DSU includes a style information group having various style information for a corresponding dialog. the

Next, various embodiments of the present invention defining a style information set (dialog_styleset()) will be explained. These embodiments are divided according to the method of defining the standard location of the text data and the dialog size. 10A to 12C show functions and views describing the first embodiment, FIGS. 13A to 13C show functions and views describing the second embodiment, and FIGS. 14A to 14G depict functions and views describing the third embodiment. the

10A to 12C show functions and views describing a style information set for defining a dialog by a function dialog_styleset() according to the first embodiment of the present invention. The first embodiment of the defined style information group is characterized by defining text box information specifying a size and a reference position for text data in an area. the

FIG. 10A shows a detailed structure of the syntax of dialog_styleset() defined in the function dialog_style_unit() of FIG. 9 according to the first embodiment of the present invention. In the function dialog_styleset(), in addition to the function region_style(), it also provides the player style flag player_style_flag, the number of region styles number_of_region_styles, the number of user styles number_of_user_styles, the user variable style group function user_changeable_styleset() and the function palette() , which defines the area style information for the dialog. The tag player_style_flag indicates whether the user is allowed to change the style information, and the function user_changeable_styleset() provides the scope of changing the style information. The function palette() provides color information. the

As described above, the regional style information is global style information defined per region. A unique identifier (region_style_id) is assigned to each region style information. Therefore, the region style information of the dialogue is provided based on the style information group corresponding to the assigned identifier region_style_id. the

Therefore, by recording the identifier region_style_id applied to the dialog in the DPU, the dialog can be reproduced by applying the set of style information defined based on the same region_style_id in dialog_styleset() when authoring the dialog. the

Next, the style information (Style_Info) contained in the style information group provided according to region_style_id will be explained. the

First, as information for defining the position and size of a corresponding region of an image frame, a region horizontal position region_horizontal_position, a region vertical position region_vertical_position, a region width region_width, and a region height region_height are provided. The region background color identifier region_bg_color_entry_id is also provided to define the background color of the corresponding region. the

Second, text box information representing the size of the text box in the corresponding area is provided. A text box indicates an area in which text data is displayed in the corresponding area. the

The size of the text box is represented by the text box width text_box_width and the text box height text_box_height. The origin of the corresponding text box in the region is provided by the text box horizontal position text_box_horizontal_position and the text box vertical position text_box_vertical_position. the

In addition, text scrolling text_flow is defined to define the direction in which text is displayed, and text alignment text_alignment is defined to define the direction in which text is aligned, such as right, left, and center. In the case of text_flow, when there are multiple regions in a dialog in order to prevent user confusion, each region in the corresponding dialog is defined to have the same text_flow. the

By referring to FIGS. 11A to 12C, the specification of text box information according to text_flow and text_alignment will be explained in detail below. the

As style information included in the style information group, line spacing line_space is defined for controlling the spacing between lines in the corresponding area. Also, define font ID font_id, font style font_style, font size font_size and font color ID font_color_entry_id as font information for controlling text data in the corresponding area. the

player_style_flag in dialog_styleset( ) is information indicating whether the style information of the playback device is available. For example, if player_style_flag is set to 1b (player_style_flag=1b), text subtitles are allowed to be reproduced using style information of a reproducing device in addition to using style information defined in dialog_styleset(). If player_style_flag is set to 0b (player_style_flag=0b), text subtitles are reproduced only by using style information defined by dialog_styleset(). the

FIG. 10B shows the function "user_changeable_styleset()" defined in the function "dialog_styleset()" in FIG. 10A. the

By referring to FIG. 10B , the function user_changeable_styleset() defines the type and change range of style information that can be changed by the user. Therefore, the function "user_changeable_styleset()" is used to allow the user to easily change the style information of the text subtitle data. the

In this embodiment, however, user-variable style information is limited to font size and region location. Therefore, the region horizontal position direction region_horizontal_position_direction, region horizontal position increment region_horizontal_position_delta, region vertical position direction region_vertical_position_direction, region vertical position increment region_vertical_position_delta, font size increase and decrease font_size_inc_dec and font size increment font_size_delta are defined in the function user_changeable_styleset(). Since the text box position and line spacing are changed according to the increase/decrease of the font size, variables for defining line spacing and text box positions are defined in the function user_changeable_styleset(). the

As described above, the function user_changeable_styleset() is defined according to region_style_id, and a plurality of user changeable style information (user_style_id) is defined in the function user_changeable_styleset(). For example, if the function user_changeable_styleset() is defined according to region_style_id=k, a maximum of 25 kinds of user changeable style information are defined in the function user_changeable_styleset() defined in this exemplary embodiment. the

Provide region_horizontal_position_direction and region_vertical_position_direction to define the moving direction of region_horizontal_position and region_vertical_position, which can be changed according to user_style_id. Also, region_horizontal_position_delta and region_vertical_position_delta are provided for the amount of change in pixels to define a change in each direction the region is moved. the

For example, if region_horizontal_position_direction is defined as 0, the corresponding region moves to the right. If region_horizontal_position_direction is defined as 1, the corresponding region moves to the left. Also, if region_vertical_position_direction is defined as 0, the corresponding region moves downward. If region_vertical_position_direction is defined as 1, the corresponding region is moved upwards. the

Also, font_size_inc_dec is provided to define the direction of increase/decrease of font size, which can be changed according to user_style_id; and font_size_delta is provided to specify the font_size change amount in units of pixels. the

For example, if font_size_inc_dec is defined as 0, it means increase font_size, and if font_size_inc_dec is defined as 1, it means decrease font_size. the

Further, the horizontal position text_box_horizontal_position and the vertical position text_box_vertical_position of the text box are provided, which are used to define the reference position of the text box which changes according to the increase/decrease of the font_size. text_box_horizontal_position and text_box_vertical_position can be defined by the same method that provides region_horizontal_position and region_vertical_position. For example, the records text_box_horizontal_position and text_box_vertical_position are used to specify the change direction, and the records text box horizontal delta text_box_horizontal_delta and text box vertical delta text_box_vertical_delta are used to specify a change amount in units of pixels. the

Also, the text box width text_box_width and the text box height text_box_height that change according to the increase/decrease of font_size can be provided similarly to the case described above for font_size. For example, record text box width increase and decrease text_box_width_inc_dec and text box height increase and decrease text_box_height_inc_dec are used to specify the direction of increase/decrease, and text box width increment text_box_width_delta and text box height increment text_box_height_delte are used to specify a change amount in pixels. the

In addition, the increase/decrease of text line space (line_space) according to the increase/decrease of font_size can be defined in the same way as the increase/decrease of font_size. That is, line space increase/decrease line_space_inc_dec and line space increment line_space_delta are recorded. the

11A and 11B show examples of displaying text boxes according to text_box_horizontal_position, text_box_vertical_position and text_flow defined according to the first embodiment of the present invention shown in FIG. 10A. the

That is, FIG. 11A shows that text_box_horizontal_position, text_box_vertical_position, and text_flow are defined to display text data with reference to the origin of the region (for example, an offset from the origin of the region), without referring to text_flow. In this case, the origin of the text data becomes the left-top (also referred to as the upper-left corner) of the text box without referring to the text arrangement or text_flow. the

FIG. 11B shows that when text_flow is from top to bottom, text data in a text box is displayed according to text_box_horizontal_position, text_box_vertical_position, and text_flow. the

As in the previous embodiment of Figure 11A, the text box is defined with reference to the origin of the region. In this case, the origin of the text data becomes the left vertex of the text box without referring to the text arrangement. the

12A to 12C show another example of displaying text boxes according to text_box_horizontal_position, text_box_vertical_position and text_flow defined according to the first embodiment of the present invention in FIG. 10A. the

That is, FIG. 12A shows that when text_flow is from left to right, text_box_horizontal_position, text_box_vertical_position, and text_flow are defined to display text data at the left vertex. FIG. 12B shows that when text_flow is from right to left, text_box_horizontal_position, text_box_vertical_position, and text_flow are defined to display text data at the right vertex. FIG. 12C shows that when text_flow is from top to bottom, define text_box_horizontal_position, text_box_vertical_position, and text_flow to display text data at the right vertex. the

As shown in FIGS. 12A to 12C , the origin of text data changes from the left vertex to the right vertex according to text_flow without referring to the text arrangement. the

FIG. 13A shows a function dialog_styleset() defined in a function dialog_style_unit() according to the second embodiment of the present invention. The second embodiment of dialog_style_unit() records text padding information instead of text box information. That is, in order to define the size of text data in an area, text padding information is recorded as area style information. Text padding information includes padding_top, padding_bottom, padding_left, and padding_right. Through the text padding information, the total size of the text data in the area can be determined. the

Information other than text padding information is the same as in the first embodiment. Therefore, detailed description is omitted. the

FIG. 13B shows the location of text data with text padding information in an area. The position of the text data in the area is determined according to padding_top, padding_bottom, padding_left, and padding_right defined by dialog_styleset() in the second embodiment. the

FIG. 14A shows the function dialog_styleset() defined in the function dialog_style_unit() according to the third embodiment of the present invention. The third embodiment of dialog_styleset() records text horizontal position text_horizontal_position and text vertical position text_vertical_position instead of text box information and text padding information, and text_horizontal_position and text_vertical_position are changed according to text alignment text_alignment. the

That is, the records text_horizontal_position and text_vertical_position are used to represent the reference position of text data in the area. The reference position is defined to change according to text_alignment, such as left, center and right. the

Information other than text_horizontal_position and text_vertical_position is the same as in the first embodiment. Therefore, detailed description is omitted. the

14B to 14D show the position of text data if text scrolling is left to right or right to left, and text_alignment is defined as left (FIG. 14B), center (FIG. 14C) or right (FIG. 14D). the

That is, if text_alignment is defined as left as shown in FIG. 14B, text_horizontal_position and text_vertical_position are defined to specify that the beginning of the first line of text data is at the left end position. If text_alignment is defined to be centered as shown in FIG. 14C, text_horizontal_position and text_vertical_position are defined to specify that the beginning of the first line of text data is in the middle. If text_alignment is defined as right as shown in FIG. 14D, text_horizontal_position and text_vertical_position are defined to specify that the end of the first line of text data is at the right end position. the

14E to 14G show the position of the text data if the text scrolling is top to bottom and text_alignment is defined as top (FIG. 14E), middle (FIG. 14F) or bottom (FIG. 14G). the

If text_alignment is defined to be upper as shown in FIG. 14E, text_horizontal_position and text_vertical_position are defined to specify that the first line of text data starts at the upper position. If text_alignment is defined to be centered as shown in FIG. 14F, text_horizontal_position and text_vertical_position are defined to specify that the beginning of the first line of text data is in the middle. If text_alignment is defined to be lower as shown in FIG. 14G, text_horizontal_position and text_vertical_position are defined to specify that the end of the first line of text data is at the lower position. the

As described above, according to one of the first, second, and third embodiments, text data is displayed together with the main AV stream by defining a frame of recording text data or a reference position of text data. the

Next, with reference to Figures 15 to 18, the method for reproducing the above-mentioned text subtitle stream file and displaying the reproduced text subtitle stream file is explained. the

FIG. 15 is a view showing information included in a dialog presentation unit (DPU) and a dialog style information unit (DSU). As mentioned above, the DSU includes a set of region style information for each region in each session, while the DPU includes dialog text information and presentation information. the

The dialog text information includes a region style identifier, defining style information for each region, text strings, and inline style information for the text strings. The area style identifier is information for linking a corresponding area to area style information in a dialogue style information unit (DSU). the

The presentation information in the DPU includes the presentation time stamp (PTS) start time (PTS_start) and presentation time stamp end time (PTS_end) for displaying each dialog, the color palette for changing the color used during the dialog display Palette update information (palette_update_flag), and changed palette information (palette for update) when there is a color change. the

That is, the text subtitle stream is constructed from dialogue style information in the DSU and dialogue presentation information in the DPU. And, the information contained in the DSU and the DPU is classified into three types of information according to the function of the information. In other words, the information is divided into dialogue text information including text strings; synthesis information including time for display, dialogue position, and color change; and rendering information converting text information into graphic information. the

As described above, the information in the DSU is used as compositing information and rendering information. As shown in FIG. 15, the information "area horizontal position" and "area vertical position" are used as composite information because the "area horizontal position" and "area vertical position" represent the position of the area in the display image. Also, the information "area width and height", "font and background color", "text scrolling and alignment", and "font name, style, and size" are used as rendering information because they are used to A region expresses the text. Also, information "text position", such as text box information, text padding information, and text horizontal/vertical reference position information are included in the rendering information. the

Next, a method and apparatus for reproducing text subtitles containing reproduction management information will be explained. the

FIG. 16 is a view illustrating an optical disc reproducing apparatus including a decoding unit 40 for reproducing text subtitles according to an exemplary embodiment of the present invention. the

As shown in Figure 16, the optical disc reproduction device includes a microcomputer 3, a system decoder 4, a PID filter 5, an audio decoding unit 10, a video decoding unit 20, a graphic decoding unit 30, a subtitle decoding unit 40, a selection unit 6 and a mixing unit 50. The system decoder 4 decodes a signal reproduced from an optical disc into an AV stream (for example, an MPEG stream) under the control of the microcomputer 3 . Although not shown for clarity, the microcomputer 3 also controls other components of the device based on input received from the user (e.g., via control buttons on the device or a remote control) and management information reproduced from the optical disc as described above. element. The PID filter 5 receives the AV stream, and extracts the existing separate streams such as video stream, audio stream, graphics stream, and text subtitle from the system decoder 4 based on the Packet Identifier (PID) in the transport packet such as the MPEG stream flow. The video decoding unit 20 receives the extracted video stream from the PID filter 5, and decodes the extracted video stream to reproduce the extracted video stream. The audio decoding unit 10 receives the extracted audio stream from the PID filter 5, and decodes the extracted audio stream to reproduce the extracted audio stream. The graphics decoding unit 30 receives the extracted graphics stream from the PID filter 5, and decodes the extracted graphics stream to reproduce the extracted graphics stream. Also, the text subtitle decoding unit 40 receives the extracted text subtitle stream from the PID filter 5, and decodes the extracted text subtitle stream to reproduce the extracted text subtitle stream. the

The optical disc reproduction device may also or additionally receive text subtitles from an external source. Therefore, the optical disc reproducing device of this embodiment may further include a selection unit 6 for selecting an input source for the text subtitle decoding unit 40 . the

If text subtitles are recorded based on MPEG format together with main data, the input source is PID filter 5. Therefore the selection unit 6 selects the PID filter 5 as the input source of the text subtitle stream, and the selection unit 6 passes the text subtitle stream extracted from the PID filter 5 to the text subtitle decoding unit 40, as shown in A of FIG. 16 . If the CD reproducing apparatus receives text subtitles from an external source, the selection unit 6 selects the external source as the input source of the text subtitle stream, and the selection unit 6 passes the text subtitle stream from the external source to the text subtitle decoding unit 40, as shown in Figure 16 Shown in B. the

The video decoding unit 20, the audio decoding unit 10 and the graphics decoding unit 30 each contain a transport buffer 11, 21, 31 respectively for buffering the video, audio and graphics streams. The video decoding unit 20 also includes a video decoder 22 and a video plane 23 for reading the extracted video stream stored in the transport buffer 21, decoding the extracted video stream and generating a video plane based on the decoded video data, i.e. displayed on A single video image frame on a display. The graphics decoding unit 30 also includes a graphics decoder 32 and a graphics plane 33 for decoding the extracted graphics stream stored in the transmission buffer 31 and generating a graphics plane based on the decoded graphics data, that is, a single video plane displayed together with the generated video plane. Graphic image frame. Graphics decoding unit 30 further includes a color look-up table (CLUT) 34 . CLUT 34 includes vales for controlling the color and transparency of the resulting graphics plane for overlaying the graphics and video planes. the

The text subtitle decoding unit 40 includes a preload buffer 41, a TXT-ST decoder 42, a graphics plane (GP) 43, and a CLUT 44. The text subtitle decoding unit 40 receives text subtitle data from the selection unit 6 , and the received text subtitle data is preloaded into a preload buffer 41 . Usually, the size of a single text subtitle data including reproduction management information is 0.5 Mbyte. Therefore, the capacity of the preload buffer 41 should be larger than 0.5M bytes. In order to provide seamless reproduction, the capacity of the preload buffer 41 should be much larger than 0.5 Mbyte. For example, the size of the preload buffer 41 may be standardized by considering the size of text subtitle data. the

The text subtitle data is preloaded into the preload buffer 41 for the following reason. Since the size of the entire text subtitle is relatively small, text subtitle data can be recorded in a separate file. By providing a separate file of text subtitles, it can be easily read and effectively used to reproduce text subtitles. In addition, by preloading the entire subtitle data into the preload buffer 41, it is more convenient to control the buffer. the

The text subtitle (TXT-ST) decoder 42 reads the text subtitle data stored in the preload buffer 41 and decodes the text subtitle data. The graphics plane 43 generates a subtitle graphics plane, that is, a single subtitle image frame displayed together with the graphics plane and the video plane, by using the decoded text subtitle data. The color and transparency of the subtitle graphics plane are controlled according to the values in CLUT 44, which are used to overlap the subtitle graphics plane with the graphics and video planes. the

The mixing unit 50 of the optical disc reproducing apparatus includes two adders 52 and 53 for mixing the signals from the video decoding unit 20, the graphics decoding unit 30 and the text subtitle decoding unit 40, and for producing video with corresponding graphics planes and subtitles image frame. That is, the mixing unit 50 receives the picture plane produced by the video decoding unit 20, the graphics plane produced by the graphics decoding unit 30, and the subtitle plane produced by the text subtitle decoding unit 40, and generates a video plane, a graphics plane, and a subtitle graphics plane with A single video image frame for the corresponding subtitle. Basically, the video plane becomes the background of a single video image frame. The graphics plane and the subtitle graphics plane are overlaid on the video plane. The overlapping order is determined according to the characteristics of the graphics plane and the subtitle graphics plane. For example, if the graphics plane is a display graphics, the graphics plane is first superimposed on the video plane by the adder 52 in the blending unit 50 . The subtitle graphics plane produced by the text subtitle decoding unit 40 is superimposed on the output of the adder 52 by the adder 53 in the blending unit 50 . Conversely, if the graphics plane from the graphics decoding unit 30 is interactive graphics, the subtitle graphics plane is first superimposed on the video plane by the adder 52 in the blending unit 50, and then the graphics plane is superimposed on the video plane by the adder 53 in the blending unit 50 on the output of adder 52. the

Next, a method of reproducing text subtitles by using the text subtitle decoding unit 40 based on the text subtitle decoder 42 will be explained in detail. the

FIG. 17 is a view showing a text subtitle decoding unit 40 according to an exemplary embodiment of the present invention. The same reference numerals in FIGS. 16 and 17 denote the same functional blocks. the

Next, with reference to FIGS. 1 to 16 and FIG. 17, reproduction of a title according to an embodiment of the present invention will be described in detail. the

When the optical disc is loaded, the optical disc reproduction apparatus reads and stores file information for reproduction and reproduction of management information. When a user requests reproduction of a title recorded in an optical disc, the optical disc reproducing apparatus reproduces a playlist associated with the title. For example, if a playlist as shown in FIG. 4 is reproduced, the optical disc reproducing apparatus reproduces main AV data managed by playitems by using the video and audio decoding units 10 and 20 . The text subtitle stream managed by the subplay item is stored in the preload buffer 41, and the font file is extracted from the optical disc according to the font information specified by the text subtitle stream. The extracted font files are stored in the font preload buffer 410 . For example, if the user selects Korean subtitles from the text subtitle streams managed by the subplayitem, "text subtitle clip 2" is stored in the preload buffer 41 . At the same time, the font file aaaaa.font is extracted according to the font information specified in the clip information of “text subtitle clip 2”, and aaaaa.font is stored in the font preload buffer 410 . After extracting and storing the corresponding text subtitle stream, the text subtitle decoding unit 40 decodes the text subtitle stream for generating a subtitle graphics plane, and transmits this subtitle graphics plane to the mixing unit 50 for processing with the main video data managed by the play item The resulting video image frames display the subtitles together. the

The decoding of the text subtitle stream is divided into three steps. The first step is to split the text subtitle stream according to the purpose. That is, the synthesis information, rendering information and dialogue text information are split from the text subtitle stream. The act of splitting data is often called parsing. the

In the second step, the text data included in the dialogue text information is rendered into bitmap data by using the rendering information. This is called rendering. the

In the third step, the rendered text data is added to the graphics plane based on the compositing information. That is, bitmap data is added to the graphics plane for reproducing text subtitles. This is called compositing. the

In order to perform the parsing step, the text subtitle decoder 42 includes a text subtitle (TXT_ST) processor 421. The text subtitle processor 421 stores the split compositing information and rendering information in the dialog compositing buffer (DCB) 425, and The divided dialogue text information is stored in the buffer (DB) 422 . the

To perform the rendering step, the text subtitle decoder 42 includes a text renderer 423 and a dialogue display controller (DP) 426 . As discussed earlier, in this step, the text data in the split dialog text information is rendered as bitmap data. The text renderer 423 receives font information for text data from the font preload buffer 410 , and receives rendering information for text data from the DP controller 426 . Then, the text renderer 423 renders the text data as bitmap data by using inline style information for each text string of the text data. After rendering, bitmap data is stored in bitmap object buffer (BOB) 424 . the

The "objects" stored in the BOB 426 are text data for each region in the dialog that has been converted to a bitmap. the

Also, the rendering step can be performed in at least two ways. As a first method, the text data can be rendered after confirming the origin, which is to be displayed according to one of the first, second and third embodiments for determining the position of the text data in the area shown in FIGS. 10A to 14G The location of the text data. As the second method, text data is first rendered, and then the rendered text data is arranged with respect to the origin of the area according to one of the first, second, and third embodiments shown in FIGS. 10A to 14G. the

For the composition step, the text subtitle decoder 42 including the DP controller 426 arranges the bitmap objects stored in the BOB 424 in the graphics plane 43 according to the composition information. Palette information in composition information is input into CLUT 44 and used to control color and transparency changes. Next, the generated subtitle graphics plane is sent to the mixing unit 50 in FIG. 16 for mixing the subtitle graphics plane and the video plane to generate video image frames with subtitles. the

As mentioned before, the user can change the style information during the rendering step and compositing step. In this case, the DP controller 426 receives user input and performs rendering and compositing according to the user input. However, it is preferable to limit style information to be changed by the user, because text subtitles may not be correctly reproduced if the user changes all style information. That is, style information to be changed by the user may be limited to area positions and font sizes. the

FIG. 18 shows a view of decoding a text subtitle through a parsing step, a rendering step, and a compositing step according to an exemplary embodiment of the present invention. the

That is, the rendering step is performed by using the rendering information and dialog text information split out in the parsing step, and the compositing step is performed for arranging the bitmap produced by the rendering step by using the compositing information split out in the parsing step object. the

As mentioned above, the text subtitle stream file is recorded in the optical disc in the form of standardized information according to the method for constructing the text subtitle stream file in the high-density optical disc of the present invention. Also, text subtitles recorded in an optical disc are efficiently reproduced according to the method and apparatus for reproducing text subtitles of the present invention. the

While the invention has been disclosed in terms of a limited number of embodiments, those skilled in the art, having the benefit of this disclosure, will appreciate numerous modifications and variations based thereon. For example, while the description is made in consideration of a Blu-ray ROM disc in several cases, the present invention is not limited to this standard or optical disc. All such modifications and variations are within the spirit and scope of the invention. the

Claims (42)

1. method that is used to reproduce the data structure that is used for the text subtitle data on the managing recording medium comprises:

Reproduce at least one AV stream file and at least one text subtitle stream files, each text subtitle stream files comprises the video picture fragment of pattern fragment and at least one and said pattern fragment association,

Said pattern fragment comprises at least one group of style information, and every group of style information provides and be used for zone location information that the zone of the text subtitle data of video picture fragment is positioned at image and the text box locating information that is used for the localization of text frame in the zone,

Said video picture fragment comprises at least one region subtitle information; Said region subtitle information comprises text subtitle data and region style identifier; Said region style identifier identifies at least one group of style information in the said pattern fragment one group being applied to text subtitle data, and

Reproduce at least one clip information file, clip information file comprises the attribute information and the timing information of corresponding stream file,

Wherein clip information file is independent of AV stream file and text subtitle stream files, and

Wherein in the clip information file is corresponding one by one with the AV stream file, and another clip information file is corresponding one by one with text subtitle stream files, and

Wherein text subtitle stream files conduct and the independently file existence of AV stream file.

2. the method for claim 1 is characterized in that, said video picture fragment has defined a plurality of region subtitle information, and each region subtitle information provides text subtitle data and region style identifier.

3. method as claimed in claim 2 is characterized in that, said video picture fragment defines maximum two region subtitle information.

4. the method for claim 1 is characterized in that, said text subtitle data comprise in text string data and the pattern data at least one of them.

5. method as claimed in claim 4; It is characterized in that; Said text subtitle data comprises text string data; One group at least one group of style information in the said region style identifier sign pattern fragment to be applied to text string data, in the text box of the one group of style information that makes text string data appear to be identified.

6. the method for claim 1 is characterized in that, said video picture fragment provides time of developing to stab the start time and time of developing is stabbed the concluding time, has defined the time of developing of text subtitle data.

7. the method for claim 1 is characterized in that, said zone location information provides the position in the upper left corner in zone in the image.

8. method as claimed in claim 7 is characterized in that, said zone location information provides the horizontal level and the upright position in the upper left corner in zone in the image.

9. method as claimed in claim 7 is characterized in that said text box locating information provides the position in the upper left corner of regional Chinese version frame.

10. method as claimed in claim 9 is characterized in that, said text box locating information provides the position of the upper left corner of text box with respect to the upper left corner in zone.

11. method as claimed in claim 10 is characterized in that, said text box locating information provides horizontal level and the upright position of the upper left corner of text box with respect to the upper left corner in zone.

12. the method for claim 1 is characterized in that, said text box locating information provides the position in the upper left corner of regional Chinese version frame.

13. method as claimed in claim 12 is characterized in that, said text box locating information provides the horizontal level and the upright position in the upper left corner of regional Chinese version frame.

14. the method for claim 1 is characterized in that, every group of style information further comprises area size's information of pointing out area size.

15. method as claimed in claim 14 is characterized in that, said area size information comprises the elevation information of pointing out region height and the width information of pointing out peak width.

16. method as claimed in claim 14 is characterized in that, every group of style information further comprises the text box dimension information of pointing out the text box size.

17. method as claimed in claim 16 is characterized in that, said text box dimension information comprises the elevation information of pointing out TextField._height and the width information of pointing out TextField._width.

18. the method for claim 1 is characterized in that, every group of style information further comprises the text box dimension information of pointing out the text box size.

19. method as claimed in claim 18 is characterized in that, said text box dimension information comprises the elevation information of pointing out TextField._height and the width information of pointing out TextField._width.

20. the method for claim 1 is characterized in that, every group of style information further comprises the region background color designator.

21. the method for claim 1 is characterized in that, every group of style information further comprises the textual scrolling inforamtion that the character of the text subtitle data of pointing out to use in the text box is advanced.

22. the method for claim 1 is characterized in that, every group of style information further comprises pointing out how in text box, to arrange the text arrangement information of text subtitle data.

23. the method for claim 1 is characterized in that, every group of style information further comprises the line space information of the spacing of pointing out that text box Chinese version caption data uses between capable.

24. the method for claim 1 is characterized in that, every group of style information comprises that further identification record is used for reproducing at text box the font ID symbol of the font file of text subtitle data on recording medium.

25. the method for claim 1 is characterized in that, every group of style information further comprises the font style designator of the font style of the text subtitle data of pointing out to be used for text box.

26. the method for claim 1 is characterized in that, every group of style information further comprises the font size information of the font size of the text subtitle data of pointing out to be used for text box.

27. the method for claim 1 is characterized in that, every group of style information further comprises the font color information of the color of the text subtitle data of pointing out to be used for text box.

28. the method for claim 1 is characterized in that, every group of style information further comprises a mark, and this mark points out whether player can use at least one type of style information that player proposes but not that this group style information proposes.

29. the method for claim 1 is characterized in that, every group of style information further comprises points out which style information is user's variable information that the user can change in this group style information.

30. method as claimed in claim 29 is characterized in that, at least one type of style information, said user's variable information is also pointed out change amount, change scope and is changed one of direction.

31. the method for claim 1 is characterized in that,

Said zone location information provides the horizontal level and the upright position in the upper left corner in zone in the image;

Every group of style information further comprises area size's information of pointing out region height and peak width; And

Every group of style information further comprises the region background color designator.

32. method as claimed in claim 31 is characterized in that, every group of style information comprises user's variable information, and user's variable information is pointed out the horizontal direction of user's moving area and the vertical direction of user's moving area.

33. method as claimed in claim 31 is characterized in that,

The text box locating information provides the horizontal level and the upright position in the upper left corner of regional Chinese version frame; And

Every group of style information further comprises the text box dimension information of pointing out TextField._height and TextField._width; The textual scrolling inforamtion that the character of the text subtitle data of pointing out to use in the text box is advanced; Point out how in text box, to arrange the text arrangement information of text subtitle data; Point out the line space information of the spacing that text box Chinese version caption data uses between capable; Identification record is used for reproducing at text box the font ID symbol of the font file of text subtitle data on recording medium; Point out to be used for the font font designator of font font of the text subtitle data of text box; Point out to be used for the font size information of font size of the text subtitle data of text box; And the font color information of color of pointing out to be used for the text subtitle data of text box.

34. method as claimed in claim 33; It is characterized in that; Every group of style information comprises user's variable information, and user's variable information points out that whether the vertical direction, user of the vertical direction of horizontal direction, user's moving area of user's moving area, horizontal direction that whether user can increase or reduce font size, the removable text box of user, the removable text box of user are to increase or reduce TextField._height, user whether can increase or reduce TextField._width and user and whether can increase or reduce the spacing that text box Chinese version caption data uses between capable.

35. the method for claim 1 is characterized in that,

Said text box locating information provides the horizontal level and the upright position in the upper left corner of regional Chinese version frame; And

Every group of style information further comprises the text box dimension information of pointing out TextField._height and TextField._width; The textual scrolling inforamtion that the character of the text subtitle data of pointing out to use in the text box is advanced; Point out how in text box, to arrange the text arrangement information of text subtitle data; Point out the line space information of the spacing that text box Chinese version caption data uses between capable; Identification record is used for reproducing at text box the font ID symbol of the font file of text subtitle data on recording medium; Point out to be used for the font font designator of font font of the text subtitle data of text box; Point out to be used for the font size information of font size of the text subtitle data of text box; And the font color information of color of pointing out to be used for the text subtitle data of text box.

36. method as claimed in claim 35; It is characterized in that; Every group of style information comprises user's variable information, and user's variable information points out whether the user can increase or reduce the vertical direction of the horizontal direction of font size, the removable text box of user, the removable text box of user, user and whether can increase or reduce TextField._height, user and whether can increase or reduce TextField._width and user and whether can increase or reduce the spacing that text box Chinese version caption data uses between capable.

37. the method for claim 1 is characterized in that, said recording areas storage pattern fragment, and each pattern fragment is as each single information packetized elementary stream.

38. the method for claim 1 is characterized in that, said pattern fragment comprises style indicator, points out that this pattern fragment is the pattern fragment.

39. method according to claim 1 further comprises:

Utilize each video picture segment area of region style identifier decoding.

40., further comprise like the said method of claim 39:

Whole text subtitle stream is preloaded into impact damper.

41. the method in recording medium identifying recording layer structure comprises:

Write down at least one AV stream file and at least one text subtitle stream files, each text subtitle stream files comprises the video picture fragment of pattern fragment and at least one and pattern fragment association,

Said pattern fragment comprises at least one group of style information; Every group of style information provides and has been used for zone location information that the zone of the text subtitle data of video picture fragment is positioned at image and the text box locating information that is used for the localization of text frame in the zone; Said video picture fragment comprises at least one region subtitle information; Said region subtitle information comprises text subtitle data and region style identifier; In at least one group of style information in the said region style identifier sign pattern fragment one group being applied to text subtitle data, and

Write down at least one clip information file, clip information file comprises the attribute information and the timing information of corresponding stream file,

Wherein clip information file is independent of AV stream file and text subtitle stream files, and

Wherein in the clip information file is corresponding one by one with the AV stream file, and another clip information file is corresponding one by one with text subtitle stream files, and

Wherein text subtitle stream files conduct and the independently file existence of AV stream file.

42. a device that is used for the decoding text subtitle data comprises:

The A/V demoder, at least one A/V stream file is configured to decode;

Preload buffer is configured at least one text subtitle stream files of preload;

Text subtitle decoder is configured to use at least one clip information file said text subtitle stream files of decoding, and said clip information file comprises the attribute information and the timing information of corresponding stream file,

Said text subtitle stream files comprises the video picture fragment of pattern fragment and at least one and pattern fragment association,

Said pattern fragment comprises at least one group of style information; Every group of style information provides and has been used for zone location information that the zone of the text subtitle data of video picture fragment is positioned at image and the text box locating information that is used for the localization of text frame in the zone; Said video picture fragment comprises at least one region subtitle information; Said region subtitle information comprises text subtitle data and region style identifier; One group at least one group of style information in the said region style identifier sign pattern fragment to be applied to text subtitle data

Wherein clip information file is independent of A/V stream file and text subtitle stream files, and

Wherein in the clip information file is corresponding one by one with the A/V stream file, and another clip information file is corresponding one by one with text subtitle stream files, and

Wherein text subtitle stream files conduct and the independently file existence of A/V stream file.

Images