KR20050094566A - Apparatus and method for reproducing a text subtitle stream of high density optical disc - Google Patents

Abstract

The present invention relates to a text subtitle stream file construction method, a playback method, and a playback apparatus in a high-density optical disc such as a Blu-ray Disc (BD). In the construction of a text subtitle stream file, the text subtitle stream file is provided. The stream is divided into a dialog style unit (DSU) and a dialog presentation unit (DPU) and recorded, and a plurality of style information (Style Info) applied to each region of the dialog in the dialog style unit (DSU). And recording the text data constituting the dialog in the dialog presentation unit (DPU) and style information in the dialog style unit (DSU) as style information applied to the text data. Characterized by recording the link information for linking any one of these Text subtitle is possible to record in the optical disc as standardized information, the stream file, will be an efficient reproduction of the recorded text subtitle stream file has becomes possible advantages.

Description

{Apparatus and method for reproducing a Text Subtitle stream of high density optical disc}

The present invention relates to a reproducing method and a reproducing apparatus for recording a text subtitle stream file in a high density optical disc, and for efficiently reproducing the recorded text subtitle stream.

 As optical recording media, optical discs capable of recording large amounts of data are widely used. Among them, recently, a new high-density optical recording medium (HD-DVD) capable of recording and storing high-definition video data and high-quality audio data for a long time, for example, Blu-ray Disc (hereinafter referred to as "BD"). ) Is being developed.

Blu-ray Disc (BD), the next-generation HD-DVD technology, is a next-generation optical recording solution that can contain data that significantly surpasses the existing DVD. Recently, the world's standard technical specifications with other digital devices have been established.

In relation to the Blu-ray Disc (BD) standard, the development of the optical record player has also begun, but the Blu-ray Disc (BD) standard is not complete yet, it is difficult to develop a complete optical record player.

In particular, in order to efficiently reproduce the data recorded in the Blu-ray Disc BD as described above, various data for user convenience such as text subtitle information should be provided as auxiliary data related to the main AV data as well as the main AV data. In addition, management information for reproducing the main data and the auxiliary data recorded in the optical disc should be systematically provided.

However, the current Blu-ray Disc (BD) standard does not have a unified standard for the auxiliary data, especially the text subtitle stream file, and thus has many limitations in developing an optical Blu-ray Disc (BD) -based optical recorder. In this situation, this is particularly problematic in recording and reproducing text subtitles on an optical disc.

The present invention was created in view of the above circumstances, and an object of the present invention is to provide a reproducing method and apparatus for constructing and reproducing a text subtitle stream file in a high density optical disc such as a Blu-ray Disc (BD). The technical challenges are as follows.

When constructing a text subtitle stream file, it is intended to provide a method of organizing style information.

Another object of the present invention is to provide a text subtitle reproducing method and apparatus for efficiently reproducing the configured text subtitle stream.

In the method for constructing a text subtitle stream file of a high density optical disc according to the present invention for achieving the above object, in configuring a text subtitle stream file, the text subtitle stream is a dialog style unit (DSU). ) And a dialog presentation unit (DPU), and the plurality of style information applied for each region in the dialog are recorded in the dialog style unit (DSU), and the dialog presentation is recorded. A link for recording text data constituting a dialog in the unit (DPU) and linking any one of style information in the dialog style unit (DSU) as style information applied to the text data. Characterized by recording information,

In addition, another text subtitle stream file configuration method of a high density optical disc according to the present invention, in configuring a text subtitle stream file, records a set of style information composed of at least one global style information, and In order to determine the global style applied to the text data displayed at the presentation time (PTS), characterized in that for recording the link information designating any one of the global style information in the style information set,

In addition, the method for reproducing a high-density optical disc text subtitle according to the present invention includes playing the text subtitle stream recorded by being divided into a dialog style unit (DSU) and a dialogue presentation unit (DPU). Reads the dialog style unit (DSU) in the subtitle stream and plays back the dialogue presentation unit (DPU) in the text subtitle stream, with a region style ID (region_style_id) recorded in the dialog presentation unit (DPU). And reproduces by utilizing specific region style information (region style) in the dialog style unit (DSU) designated by

In addition, the apparatus for reproducing a high density optical disc text subtitle according to the present invention, in reproducing a text subtitle stream composed of one dialog style unit (DSU) and a plurality of dialog presentation units (DPUs), performs the text subtitle stream. Reproduces and stores a dialogue presentation unit (DPU) recorded in a text subtitle stream stored in the buffer, and by a region style ID (region_style_id) recorded in the dialogue presentation unit (DPU). And a text subtitle decoder for playing by utilizing specific region style information (region_styles) in the designated dialogue style unit (DSU).

Hereinafter, a preferred embodiment of a method of configuring a text subtitle stream file of a high density optical disc according to the present invention will be described in detail with reference to the accompanying drawings. In addition, the terms used in the present invention was selected as a general term widely used as possible now, but in certain cases, the term is arbitrarily selected by the applicant, in which case the meaning is described in detail in the description of the invention, The present invention is to be understood as the meaning of terms rather than names.

In this regard, the meaning of "main data" used in the present invention refers to video and audio data provided to a user by a disc author as a title information recorded in an optical disc, and is generally recorded in MPEG2 format. Also known as the "main AV stream."

In addition, the meaning of "auxiliary data" means all data related to main data provided for the user's convenience in playing back the "main data", including subtitle information, interactive graphic streams, presentation graphic streams, Sound information, additional audio data including browsable slideshows, etc., and depending on the nature of each auxiliary data, are recorded multiplexed onto the main AV stream in MPEG2 format, or in MPEG2 format or other formats. It may also be recorded in a stream file independent of the AV stream.

In addition, in the present invention, the term "subtitle" as auxiliary data is a kind of subtitle information. When a user wants to watch a video (main AV data) currently being played with subtitles of a specific language, the subtitle supported by the optical disc If the subtitle of the language is selected, it means the information displayed on one side of the screen. Accordingly, the subtitles can be provided in various forms. In particular, the subtitles recorded as text data are referred to as "text subtitles".

In the present invention, the "Text Subtitle" is configured in the MPEG2 format and is recorded as a stream file independent of the main data. It is intended to provide a method and apparatus for recording and recording the same on an optical disc and reproducing the recorded "Text Subtitle stream file".

Hereinafter, a recording format for recording auxiliary data including the main data and text subtitle data in a disc and a file structure for managing the same will be described in detail with reference to FIGS. 1 to 2.

  First, FIG. 1 shows a file structure for managing data recorded on a disc, where at least one BD directory exists under one root directory, and a user exists in the BD directory. It contains the index file (index.bdmv) and the object file (MovieObject.bdmv) as general file (parent file) information to ensure interactivity with the file, and plays back data recorded on the actual disk. As four directories having information on information, a method of playing them, and the like, a playlist directory (PLAYLIST), a clip information directory (CLIPINF), a stream directory (STREAM), and an auxiliary data directory (AUXDATA) are provided. Hereinafter, the above four types of directories and files included therein will be described first, and then the relation between text subtitle information and files related to the present invention will be described in detail.

First, in the stream directory (STREAM), auxiliary streams such as files and text subtitles for the main video and audio streams (called "main AV streams") recorded in a specific format on the disc (called "text subtitle streams"). Is independently present, and as described above, the stream file is recorded as a transport packet of the MPEG2 method, which is now widely known, and thus, the stream file (01000.m2ts, 02000). .m2ts, 10001.m2ts) extension will be used as "* .m2ts", but the "text subtitle stream (10001.m2ts)" has a different nature of auxiliary data than the main AV stream. For example, you can use file extensions separated by "* .txtst".

In the BD specification, such a stream file is sometimes called a "clip stream file." In connection with the present invention, the above-described text subtitle data is in the form of a separate file from the AV stream. That is, it will exist as a text subtitle stream file (10001.m2ts or .txtst).

The clip information directory (CLIPINF) is composed of each stream (* .m2ts) file and one-to-one corresponding clip info file (* .clpi). In particular, the clip information file (* .clpi) records attribute information and timing information of a corresponding stream file. Among the information, the presentation time stamp (PTS) is determined by an entry point map method. : One-to-one correspondence between a Presentation Time Stamp (SPN) and a Source Packet Number (SPN) in a table form, and then time information (In) provided by a PlayItem or a SubPlayItem that will be described later. Mapping information for searching a specific position of a corresponding stream file (* .m2ts) from -Time and Out-Time may be provided depending on the type of clip.

As described above, a stream (* .m2ts) file and a clip information file (* .clpi) corresponding to each other are bundled together, and the BD standard calls it "clip." Therefore, the file "10001.clpi" in the clip information directory (CLIPINF) contains attribute information for the file in the stream directory (STREAM), for example, the text subtitle stream file "10001.m2ts", and the file "10001. clpi "and" 10001.m2ts "form one clip.

The playlist directory (PLAYLIST) consists of playlist files (* .mpls), and each playlist file (* .mpls) contains at least one play that specifies the playing interval for a particular clip. Contains an item (PlayItem).

Therefore, the PlayItem (PlayItem) is the playback start time (In-Time) and the end time of playback of a particular clip (i.e. clip) specified by the clip name (Clip_Information_File_name) in the PlayItem (PlayItem). (Out-Time) has time information, which has been used in the mapping information in the clip information (* .clpi) has been described above.

As a result, the playlist file (* .mpls) becomes basic playback file information for playing a desired clip combination by combining at least one PlayItem.

Also, a playlist file (* .mpls) may include a subplayitem (SubPlayItem) for managing reproduction of auxiliary data. For example, a subplayitem (SubPlayItem) for playing a text subtitle is provided. In this case, the data is played back in synchronization with the PlayItem. However, when a SubPlayItem for playing a browsable slide show is provided, the data is asynchronous with the PlayItem. non-synchronized data playback.

In relation to the present invention, a case of managing auxiliary data including a text subtitle as the subplayitem (SubPlayItem) will be described by way of example. A detailed description thereof will be described later.

The auxiliary data directory (AUXDATA) is an area for separately recording auxiliary data files for disc playback. For example, an auxiliary data directory (AUXDATA) provides a "sound file" for providing a click sound to support user-friendly disc playback. Sound.bdmv) " and " font files (* .font or * .otf) " applied to the reproduction of text subtitles.

Therefore, in a specific use example, it may be possible to record the text subtitle stream 10001.m2ts, which is a kind of auxiliary data, in the auxiliary data directory AUXDATA.

In addition, an index file (index.bdmv) and an object file (MovieObject.bdmv) exist as a general file for ensuring interactivity with a user in the above-described BD directory (BDMV). (index.bdmv) mainly consists of an index table, and a user selectable menu information and a title information are provided in the index table.

Fig. 2 briefly shows a form in which information related to the file structure is recorded on a disc. From the inside of the disc, a file system information area and a recorded stream as system information for managing the entire file are shown. Playlist files and clip information files for playing (* .m2ts) files, and areas where index files (index.bdmv) and object files (MovieObject.bdmv) are recorded as parent files (regular files) (referred to as "Database Area"). "," And a stream file area in which auxiliary data, such as audio / video / graphics and main data and text subtitles, which are independently multiplexed in the main data, are recorded. Able to know.

Accordingly, a user determines and utilizes main data and auxiliary data to be reproduced through the file information in the database area and / or stream management information in the stream file area and a reproduction method thereof. Done.

Hereinafter, a detailed configuration of the text subtitle stream file of the present invention will be described. First, a method of newly defining management information for reproducing the text subtitle, and configuring the text subtitle stream file including the defined management information And a text subtitle reproducing method and reproducing apparatus for reproducing the recorded stream file will be described in detail.

3 illustrates an example in which the text subtitle data and the main data are simultaneously displayed in one screen of the present invention, and show that the text subtitle data is provided in synchronization with the main data in time.

4 is a diagram schematically showing a method of reproducing and managing a text subtitle of the present invention in connection with file information on a file structure. The text subtitle of the present invention is managed by a SubPlayItem in a playlist. A plurality of text subtitle clips (Clips) are reproduced and managed together in one subplayitem (SubPlayItem).

Specifically, at least one PlayItem (PlayItem) for managing the playback of the main AV clip (Clip) in the PlayList (PlayList) file, and if there is a text subtitle related to the main AV data Managed as a SubPlayItem, for example, there is a text subtitle clip 1 in English and a text subtitle clip 2 in Korean, respectively. The title clips 1 and 2 are synchronized with the main AV data in time, and will be displayed on the screen together with the main AV data at a desired presentation time.

Therefore, in order to reproduce the text subtitle, it can be seen that information about the presentation time to be played and the position and size to be played in the screen is required as the minimum management information. A method of recording various management information for reproducing the subtitle as file information in the optical disc will be described in detail.

5A to 5C are diagrams for explaining text subtitle reproduction management information recorded in a text subtitle stream of the present invention. FIG. 5A is dialog information, FIG. 5B is region information, and FIG. 5c is a diagram illustrating style information.

FIG. 5A is information for reproducing and managing a text subtitle of the present invention, and relates to dialog information, wherein "Dialog" means at least one or more text data existing within a specific presentation time. Refers to management information that integrates and manages (Text data).

That is, the presentation time that informs the playing time of the screen is generally expressed as a "PTS (Presentation Time Stamp)", and defines the entire text subtitle displayed during a specific PTS section as a dialog. Therefore, the playback management can be convenient.

For example, if the text subtitle data displayed during the PTS (k) and PTS (k + 1) time is composed of two lines, all the text subtitle data are defined by the same dialog. I can see that. In this regard, a maximum of 100 conditions for the number of character codes of the text subtitle data included in the dialog may be desirable.

FIG. 5B is information for reproducing and managing a text subtitle of the present invention, and relates to region information, and a "region" constitutes a dialog existing within a specific presentation time. As information to be described, it refers to an area to which style information (Style Info, in particular, “global style information”) to be described later is equally applied, and up to two regions may exist in one dialog. That is, a dialog may be composed of one region and two regions.

In relation to this, in the present invention, the reason for defining only a maximum of two regions in one dialog is that the decoding burden is taken into account when reproducing a text subtitle. It is obvious that at most n (n> = 2) regions can be defined in the Dialog.

Fig. 5C is information for reproducing and managing text subtitles of the present invention, which relates to style information, and " Style Info " is information specifying how to display text subtitle data on the screen. The position, size, and background color of the screen correspond to essential style information. In addition, the alignment method, text flow, etc. Accordingly, various types of information can be defined as style information and used as a standard.

In this regard, the present invention intends to utilize style information by dividing the style information into "Global Style Info" and "Local Style Info". This is to make various displays.

That is, "Global Style Info" is Style Info applied to each region in the same manner, and information specifying the location and size of each region of the text subtitle in the screen. This is also referred to as "region style information" (region_styles). FIG. 5C illustrates an example in which two regions (region # 1, # 2) have different “region style information (region_styles)”. For example, region 1 (region # 1) represents region style information (region_styles). This is a case where "position1, size1, color = blue" is shown, and region 2 (region # 2) shows a case where "position2, size2, color = red" is used as region style information (region_styles).

Further, "Local Style Info" is Style Info applied to each text data line or text data character in a region, and is referred to as "Inline Style Information ( inline _styles) ". For example, in FIG. 5C, when "inline_styles" is applied to region # 1, the "mountain" portion of the text data is applied with inline style information (inline_styles) different from other text data. The case is shown.

In this regard, the data to which specific inline style information (inline_styles) of text data is applied as described above is referred to as a "text string".

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

That is, the text subtitle stream of the present invention is composed of an MPEG-2 transport stream, and all of the transport packets (TP) included in the stream are the same as PID (Packet Identifier). Is assigned as "PID = 0x18xx". Therefore, the optical recording / reproducing apparatus reads out the transport packet TP to which " PID = 0x18xx " is assigned to the input stream, thereby making it possible to easily read only the text subtitle stream.

In addition, the plurality of transport packets TP constitute one "Packet Elementary Stream" (PES). In the present invention, one packet stream (PES) is formed for each of the dialogs described above. Therefore, there is an advantage that dialog playback becomes easy.

In the first packet stream (PES) in the text subtitle stream, a "Dialog Style Unit" (DSU) is recorded as a set unit of region styles in the aforementioned style information. The second and subsequent packet streams (PES) have a structure in which a "dialog presentation unit (DPU)" is recorded as a unit in which actual dialog information is recorded.

Accordingly, in the case of following the text subtitle stream structure as shown in FIG. 6, each dialog information defined in FIGS. 5A to 5C described above means a dialog presentation unit (DPU), and the dialog information in the dialog information. Style Info includes information (region_style_id) and inline styles that link any one of a variety of region styles set defined in the dialog style unit (DSU). Will mean).

In this invention, the dialog style unit (DSU) records the maximum number of region styles (sets) set by the standard, for example, up to 60 unique style information is recorded. Each of these is identified by a region style ID (region_style_id).

Fig. 7 is a simplified diagram showing the configuration of the dialog style unit (DSU) and the dialogue presentation unit (DPU) recorded in the text subtitle stream of the present invention. In this regard, specific text subtitle stream syntax will be described in detail later with reference to FIG. 8.

That is, the dialog style unit (DSU) records up to 60 region style information (region style), and divides them by region style ID (region_style_id). For each region style ID (region_style_id), a region style set recording various region style information is recorded and a user changeable style set is recorded. Relevant content of region style information will be described in detail later with reference to FIG. 9B and content of user changeable style information will be described later with reference to FIG. 9C.

In addition, the dialog presentation unit (DPU) records text data and time information (PTS set) indicating the time when text data is presented, and records style information applied to each region. As a result, information linking any one of the specific region style information in the above-described dialog style unit (DSU) is recorded, and such link information is referred to as a region style ID (region_style_id).

Therefore, DPU # 1 is composed of one region, and the region style applied to text data # 1 is a case where "region_style_id = k" in the dialog presentation unit (DPU) is applied. # 2 consists of two regions, and the region style applied to text data # 1 in the first region applies "region_style_id = k" in the dialog presentation unit (DPU), and in the second region. The region style applied to the text data (Text data # 2) refers to a case where "region_style_id = n" in the dialog presentation unit (DPU) is applied. Similarly, DPU # 3 and DPU # 4 apply "region_style_id = n" and "region_style_id = m" in the dialogue presentation unit (DPU) as style information, respectively.

On the other hand, the style information linked by the region style ID ("region_style_id") is equally applied to all text data (Text data) in the region (ie, global style information), text data (Text data) In the case where it is desired to change the style information in a specific text string within the text string, the inline style information is defined and used as local style information applied only to the text string.

In this regard, specific dialog presentation unit (DPU) syntax will be described in detail later with reference to FIGS. 10A and 10B.

Hereinafter, the syntax structures of the dialogue style unit (DSU) and the dialogue presentation unit (DPU) described above will be described in detail with reference to FIGS. 8 to 10B.

First, FIG. 8 shows the syntax of the text subtitle stream ("Text_subtitle _stream ()") of the present invention, and "Text_subtitle _stream ()" of the present invention is a set of Style Info. "Dialog_style_unit ()" syntax for one dialog style unit (DSU) defining the " dialog_presentation_unit (DPU) " for a plurality of dialog presentation units (DPU) in which actual dialog information is recorded. You can see that it consists of syntax.

9A to 9C show a detailed configuration of "dialog_style_unit ()", which means the dialogue style unit (DSU).

FIG. 9A relates to the overall configuration of "dialog_style_unit ()" of the present invention. In "dialog_style_unit ()", "dialog_styleset" defines a set of various style information (Sytle Info) utilized in a dialog. () "Is defined.

FIG. 9B relates to the "dialog_style set ()" of the present invention, which is defined in the "dialog_style_unit ()". In addition to the region-styles described above, the style information is changed in the "dialog_style set ()". There are "Player_style_flag" which indicates whether to allow it, "user_changeable_styleset ()" which defines the range of style information change by the user, and "palette ()" which indicates the color information. .

First, as described above, the region-styles mean "global style information" defined for each region, and the identification information (region-style) is defined for each region style. "region_style_id") is assigned, and a style information set corresponding to a specific "region_style_id" is defined.

Therefore, the "region_style_id" applied to the dialog is recorded in the dialog presentation unit (DPU), and when the dialog is to be played, the same "" in the dialog_style set () "is recorded. Plays by applying the style information set defined by "region_style_id".

In relation to this, individual style information (Style Info) included in a style information set provided for each "region_style_id" will be described below.

First, "region_horizontal_position", "region_vertical_position", "region_width", and "region_height" are provided as information defining the position and size of the screen of the region, and the background color of the region is provided. Information about "region_bg_color_index" is provided.

Next, as information defining the origin position of text in the region, "text_horizontal_position" and "text_vertical_position" are provided, and the writing direction of the text (left-> right, right-> left, up->) is provided. Defines "text_flow" and "text_alignment" which defines the alignment direction of the text (left, center, and right). In particular, in the case of "text_flow", a plurality of regions are defined in a specific dialog. ) Exists, each region in the dialog is defined to have the same "text_flow" value, in order to prevent user's viewing confusion.

In addition, as individual style information included in a style information set, "line_space" for specifying an interval between lines in a region, and font information for actual text data. "Font_type", "font_style", "font_size" and "font_color_index" information are provided.

On the other hand, "Player_style_flag" recorded in "dialog_style set ()" is information indicating whether or not the disk author (Author) can use the style information held by the player, for example, "Player_style_flag = 1b". In this case, in addition to the style information defined in the "dialog_style set ()" in the disk, the player allows the player to play the text subtitle using the style information provided in the device, and "Player_style_flag = 0b". This means that only style information defined in "dialog_style set ()" on disk can be used.

Fig. 9C relates to the "user_changeable_style set ()" of the present invention, which is defined within the "dialog_style set ()".

In this regard, the "user_changeable_style set ()" of the present invention pre-defines the type and range of changeable style information by the user, so that the user can easily change the style information of the text subtitle data. This information is used.

However, if all the style information described above in FIG. 9B is changeable by the user, this may increase the user's confusion. Therefore, in the present invention, only "font_size" and "region_horizontal / vertical_position" are defined as changeable style information. It is characterized in that, but also may be defined at the same time the increase and decrease of "text position" and "line space" that is changed by the increase and decrease of "font_size".

That is, "user_changeable_style set ()" is defined for each of the "region_style_id" mentioned above. For example, up to 25 kinds of user change style information ("user_style_id") can be stored in "user_changeable_style set () within a specific" region_style_id = k ". It is possible to define within "".

In addition, "region_horizontal _position_direction" and "region_vertical_position_direction" information for specifying change movement direction of changeable "region_horizontal / vertical_position" are provided for each "user_style_id", and one change in each direction is specified in pixels. "region_horizontal _position_delta" and "region_vertical_position_delta" information are provided.

That is, for example, "region_horizontal_position_direction = 0" means to move to the right, and "region_horizontal_position_direction = 1" to change to the left. If "region_vertical_position_direction = 0", (change) to (down). If "region_vertical_position_direction = 1", it means to change to up.

Each "user_style_id" is provided with "font_size_inc_dec" information for specifying the change direction of "font_size" which can be changed, and "font_size_delta" information for specifying one change of "font_size" in pixel units. .

That is, for example, if "font_size_inc_dec = 0", it means the direction in which "font_size" increases, and if "font_size_inc_dec = 1", it defines as the direction in which "font_size" decreases. It can be utilized.

In this regard, the characteristics of the "user_changeable_style set ()" of the present invention are as follows.

First, the number of "user_control_style ()" defined in all "region_style ()" included in the dialog style unit (DSU) is the same. That is, the number of "user_control_style" applicable to all dialog presentation units (DPUs) is the same.

Second, each " user_control_style () " is represented by a different " user_style_id ", and the same order of " user_control_style () " is applied to all " region_style () "

Third, in one "user_control_style ()" all combinations of modifiable styles are defined together. That is, "region_position" and "font_size" are not defined separately, but together.

Fourth, the direction of movement (* _direction) or increment (* _inc_dec) is recorded separately from each change (* _delta). That is, by defining only a change (* _delta) without having a style value that is actually changed, in order to obtain a style value that is actually changed, the value defined in "region_style ()" is defined. The final value should be obtained by adding up the changes (* _delta).

Fig. 9D relates to the pallet information ("Palette ()") of the present invention defined in the "dialog_style set ()". This is to provide color change information of the text subtitle data recorded in the dialog, and the unique luminance (Y_value) and color (Cr_value, Cb_value) values and text for each palette entry (palette_entry-id). "T_value" which designates the transparency of data is provided, and it is the information which recorded the some pallet entry (palette_entry-id).

10A and 10B illustrate a detailed configuration of "dialog_presentation_unit ()", which stands for the dialogue presentation unit (DPU).

FIG. 10A relates to the entire configuration of "dialog_presentation_unit ()" of the present invention. First, "dialog_presentation_unit ()" indicates "dialog_start_PTS" and "dialog _end_PTS" information specifying a presentation time of a corresponding dialog. Is defined.

Next, "palette_update_flag" is displayed to indicate the change of color information in the corresponding dialog. If "palette_update_flag = 1b", the color is changed (update). Defines "palette ()" information separately.

In addition, next, record "dialog_region ()" which defines region information, but the present invention is a case in which up to two regions are provided in one dialog. dialog_region () "information.

In the " dialog_region () ", " region_style_id " information designating any one of the style information (region styles) described above with reference to Fig. 9B, and " continuous_present_flag " "The information is recorded.

In addition, in "dialog_region ()", text data included in the corresponding region information and "region_subtitle ()" information defining local style information (Local Style Info) are recorded.

FIG. 10B relates to "region_subtitle ()" information defined in the "dialog_region ()", where "region_subtitle ()" is a text string and a set of inline style information applied to the text string. Consists of.

First, when the type in "region_subtitle ()" is "type = 0x01", it means a text string. Therefore, the character code (char_data_byte) is recorded in "text_string ()".

In addition, when the type in "region_subtitle ()" is not "type = 0x01", it means inline style information. For example, when "type = 0x02", the font set (Font) set), and the font ID value specified in ClipInfo is recorded in "inline_style_value ()". If "type = 0x03", it means the font style is changed and "inline_style_value". In () ", the corresponding font style value is recorded. If" type = 0x04 ", the font size is changed. In" inline_style_value () ", the corresponding font size value is recorded. In case of type = 0x05 ", it means to change font color. In" inline_style_value () ", the index value specified in the related palette is recorded. In case of" type = 0x0A ", the line change (line It is defined as meaning break.

For example, in FIG. 5C, "mountain" of text data corresponding to region # 1 is described as one "text_string" ("text_string = mountain"), and as local style information. By setting "inline_style type = 0x04 (change Font size)" and "inline_style_value () = xxx", it becomes possible to play the font size (Font_size) of "text_string = mountain" to the desired value (xxx). .

Fig. 11 shows the overall configuration of an optical recording / reproducing apparatus including text subtitle data reproduction of the present invention, wherein pickup section 11 for reading main data, text subtitle stream and related reproduction management information recorded in the optical disc is shown. And the servo 14, which controls the operation of the pickup section 11, restores the playback signal received from the pickup section 11 to a desired signal value, or modulates the signal to be recorded into a signal recorded on the optical disc. And a signal processor 13 for transmitting the data, a memory 15 for storing the necessary information in the system, and a microcomputer 16 for controlling the operation.

In addition, the AV decoder and the text subtitle (Text ST) decoder 17 finally decode the output data under the control of the controller 12 and provide the same to the user, and the AV encoder 18 records the signal on the optical disc. In order to perform the function, the input signal is converted into a signal of a specific format, for example, MPEG2 (MPEG2) transport stream, and provided to the signal processor 13 under the control of the controller 12.

In addition, the buffer 18 is used for preloading and storing the text subtitle stream in advance in order to decode the text subtitle of the present invention, and the controller 12 controls the operation of the entire optical recording and reproducing apparatus. As a control element, when a text subtitle playback request command of a specific language is input by the user, the text subtitle stream is preloaded and stored in the buffer 18, and is preloaded to store the buffer ( Referring to the above-described dialog information, region information, and style information among the text subtitle stream information stored in 18), the actual text data is displayed in a specific size on a screen at a specific size. The text subtitle decoder 17 is controlled.

That is, the text subtitle decoder 17 reproduces the dialogue presentation unit (DPU) recorded in the text subtitle stream preloaded in the buffer 18, but is recorded in the dialogue presentation unit (DPU). The text subtitle is played by utilizing specific region style information (region style) in the above-described dialog style unit (DSU) designated by the region style ID (region_style_id).

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

The text subtitle stream file configuration method and reproduction method and playback apparatus of the high density optical disc according to the present invention enable the text subtitle stream file to be recorded on the optical disc as standardized information, and the recorded text subtitle stream file. It will be said that there is an advantage of enabling efficient playback.

1 shows a file structure of a high density optical disc of the present invention,

Fig. 2 shows the recording form of the high density optical disc of the present invention;

3 illustrates an in-screen display form of a text subtitle stream of the present invention;

4 shows a file structure for managing playback of a text subtitle stream of the present invention;

5A to 5C show utilization of reproduction management information for reproducing the text subtitle of the present invention;

6 illustrates a text subtitle stream file structure of the present invention;

7 illustrates application of style information in the text subtitle stream file structure of the present invention;

 8-10B illustrate the syntax of the text subtitle stream of the present invention.

Fig. 11 shows the entire optical recording and reproducing apparatus including text subtitle stream reproduction of the present invention.

※ Explanation of code for main part of drawing

12 control unit 16 microcomputer

18: Buffer 17: (Text Subtitle) Decoder

Claims (17)

In organizing the text subtitle stream file, The text subtitle stream is divided into a dialog style unit (DSU) and a dialogue presentation unit (DPU), and recorded. The dialogue style unit (DSU) records a plurality of style information (Style Info) applied to each region in the dialog, The dialog presentation unit (DPU) records text data constituting the dialog and is used as one of the style information (Style Info) in the dialog style unit (DSU) as style information applied to the text data. And recording link information for linking the text subtitle stream file of the high density optical disc. The method of claim 1, And the link information is a region style ID (region_style_id). The method of claim 1, The style information (Style Info) recorded in the dialog style unit (DSU) is a maximum of 60 pieces of text subtitle stream file construction method of the high density optical disc. The method of claim 2, When two regions exist in the dialog presentation unit (DPU), a text subtitle stream file configuration method of a high density optical disc, characterized by recording a region style ID (region_style_id) for each region. . The method of claim 2, If there is a change in the region style information applied to the dialog presentation unit (DPU) by the region style ID (region_style_id), it is recommended to record the inline style information for each text string that needs to be changed. A method of constructing a text subtitle stream file of a high density optical disc. In organizing the text subtitle stream file, Record a style information set consisting of at least one global style information, A text subtitle of a high density optical disc, characterized by recording link information designating any global style information in the set of style information to determine a global style applied to text data displayed at a specific presentation time (PTS). How to organize stream files. The method of claim 6, And a text subtitle displayed in the specific presentation time (PTS) is a dialog having a maximum of two regions. The method of claim 7, wherein And the global style information is region style information commonly applied to text data of each region. The method of claim 8, And the link information is a region style ID (region_style_id). The method of claim 6, A method of constructing a text subtitle stream file of a high density optical disc, comprising recording local style information applied to a text string in the text data. The method of claim 10, And the local style information is inline style information applied only to a text string requiring global style change. The method of claim 6, And the set of global style information is recorded in one packet stream (PES). An optical disc on which a text subtitle stream is recorded by the text subtitle stream file construction method according to claim 1. In playing back a recorded text subtitle stream divided into a dialog style unit (DSU) and a dialogue presentation unit (DPU), Read a dialog style unit (DSU) in the text subtitle stream, Reproduces the dialog presentation unit (DPU) in the text subtitle stream, but specifies specific region style information in the dialog style unit (DSU) specified by the region style ID (region_style_id) recorded in the dialog presentation unit (DPU). A text subtitle playback method of a high density optical disc, characterized in that the playback using the (region style). The method of claim 14, Presentation time information (start_PTS, end_PTS) is recorded in the dialog presentation unit (DPU). The method of claim 14, And the text subtitle stream to be reproduced is preloaded and stored in advance. In playing a text subtitle stream composed of one dialog style unit (DSU) and a plurality of dialog presentation units (DPUs), A buffer for preloading and storing the text subtitle stream; The dialogue presentation unit (DPU) recorded in the text subtitle stream stored in the buffer is reproduced, and the dialogue style unit (DSU) designated by the region style ID (region_style_id) recorded in the dialogue presentation unit (DPU) is provided. And a text subtitle decoder for playing by utilizing specific region style information (region_styles) in the text subtitle reproducing apparatus.