WO2005074400A2 - Recording medium and method and apparatus for decoding text subtitle streams - Google Patents
Recording medium and method and apparatus for decoding text subtitle streams Download PDFInfo
- Publication number
- WO2005074400A2 WO2005074400A2 PCT/KR2005/000092 KR2005000092W WO2005074400A2 WO 2005074400 A2 WO2005074400 A2 WO 2005074400A2 KR 2005000092 W KR2005000092 W KR 2005000092W WO 2005074400 A2 WO2005074400 A2 WO 2005074400A2
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- WIPO (PCT)
- Prior art keywords
- region
- style
- dialog
- text
- styles
- Prior art date
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
- G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42646—Internal components of the client ; Characteristics thereof for reading from or writing on a non-volatile solid state storage medium, e.g. DVD, CD-ROM
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
- H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
- H04N21/4316—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/432—Content retrieval operation from a local storage medium, e.g. hard-disk
- H04N21/4325—Content retrieval operation from a local storage medium, e.g. hard-disk by playing back content from the storage medium
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/488—Data services, e.g. news ticker
- H04N21/4884—Data services, e.g. news ticker for displaying subtitles
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/781—Television signal recording using magnetic recording on disks or drums
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
- H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
- H04N9/8205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal
- H04N9/8233—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal the additional signal being a character code signal
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2541—Blu-ray discs; Blue laser DVR discs
Definitions
- the present invention relates to a recording medium and a method and apparatus for
- Optical discs are widely used as an optical recording medium for recording mass data.
- HD-DVD Blu-ray Disc
- HD-DVD technology are under establishment as a next generation optical recording
- optical reproducing apparatuses having the Blu-ray Disc (BD) standards Accordingly, optical reproducing apparatuses having the Blu-ray Disc (BD) standards
- BD ray Disc
- subtitle information as the supplementary data related to the
- main AV data be provided, but also managing information for reproducing the main data
- supplementary data such as subtitles to the user.
- the present invention is directed to a text subtitle decoder and a method for
- An object of the present invention is to provide a recording medium including a dialog style
- segment defining a set of user control styles, each of which is able to change at least one of
- Another object of the present invention is to provide a method and an apparatus for
- a recording medium includes a data
- subtitle stream may further include at least one dialog presentation segment, each of which
- the dialog style segment further defines a set of user control styles for each region
- each user control style is selectable and is configured to change at least one of
- region presentation properties specified by a corresponding region style For example, each
- user control style may specify a direction and a magnitude of a change in at least one of a
- region horizontal position a region vertical position, a text horizontal position, a text vertical position, a line space, and a font size, all which are specified in the corresponding
- Each dialog presentation contains at least
- style segment further defines a set of user control styles for each region, where each user
- control style is selectable and is configured to change at least one of region presentation
- a text subtitle decoder is able to
- Each user control style may specify a direction and a magnitude of a change in the region
- properties include at least one of a region horizontal position, a region vertical position, a
- FIG. 1 illustrates a file structure of data files recorded on an optical disc according to an
- FIG. 2 illustrates data storage areas of an optical disc according to an example of the present
- FIG. 3 illustrates a text subtitle and a main image presented on a display screen when a text
- subtitle stream and a main AV stream are reproduced
- FIG. 4 is a schematic diagram illustrating reproduction control of a main AV clip and text
- FIG. 5A illustrates a dialog presented on a display screen according to an example of the
- FIG. 5B illustrates regions of a dialog according to an example of the present invention
- FIG. 5C illustrates region and inline styles for regions of a dialog according to an example
- FIG. 6 illustrates presentations of text subtitle dialogs on a display screen in presentation
- FIG. 6B illustrates continuities between text subtitle dialogs presented on a display screen in
- FIG. 7 A illustrates a text subtitle stream file according to an example of the present
- FIG. 7B illustrates specific information contained within a DPU and a DSU included in a
- FIG. 8 illustrates a syntax for a text subtitle stream according to an example of the present
- FIG. 9 A illustrates a syntax for a dialog style unit according to an example of the present
- FIG. 9B illustrates a syntax for a dialog style set included in a dialog style unit according to
- FIG. 9C illustrates a syntax for a user changeable style set included in a dialog style set
- FIG. 10 illustrates an example of the apparatus for decoding main AV streams and text
- FIG. 11 illustrates an example of the method for decoding a text subtitle stream recorded on
- main data represent audio/video (AV) data that belong to a title
- the AV data are AV data (e.g., a movie title) recorded in an optical disc by an author.
- the AV data are
- AV streams recorded in MPEG2 format and are often referred to as AV streams or main AV streams.
- supplementary data represent all other data required for reproducing the main data
- supplementary data streams may be recorded in MPEG2 format or in any other data format.
- a subtitle represents caption information corresponding to video (image) data being
- reproduced and it may be represented in a predetermined language. For example, when a
- displayed caption information is text data (e.g., characters), the selected subtitle is often called a text subtitle.
- a text subtitle e.g., characters
- subtitle streams in MPEG2 format may be recorded in an optical disc, and they may exist as
- Each text subtitle stream file includes text data for a
- MPEG2 format may be recorded in an optical disc.
- FIG. 1 illustrates a file structure of data files recorded on an optical disc
- BD Blu-ray disc
- FIG. 1 at least one BD directory (BDMV) is included in a root directory (root).
- BDMV BD directory
- index.bdmv index.bdmv
- object file MerovieObject.bdmv
- the index file may contain
- Each BD directory further includes four file directories that include audio/video (AV) data
- the file directories included in each BD directory are a stream directory (STREAM), a clip
- CrPLNF information directory
- PLAYLIST playlist directory
- auxiliary data auxiliary data
- the stream directory (AUX DATA).
- the stream directory (STREAM) includes audio/video
- AV stream files having a particular data format.
- the AV stream files may be
- each text subtitle stream file includes text (e.g., characters) data for a text subtitle represented in a
- stream files exist as independent stream files within the stream directory and may be named
- a clip stream file included in the stream directory is often called a clip stream file.
- the clip information directory (CLLPLNF) includes clip information files that
- Each clip information file contains property and reproduction timing
- a clip information file may
- mapping information in which presentation time stamps (PTS) and source packet
- SPN entry point map
- a particular location of a stream file may be determined from timing
- corresponding clip information file is designated as a clip.
- CL ⁇ PINF includes property and reproduction timing information of 01000.m2ts included
- the playlist directory includes one or more PlayList
- each PlayList file includes at least one Playltem which designates at
- a Playltem contains information designating hi- Time and Out-Time, which represent
- PlayList file represents the
- PlayList file may further include a SubPlayltem, which represents the basic reproduction
- the main function of a SubPlayltem is to control
- auxiliary data directory may include supplementary data stream
- font files e.g., *.font or *.otf
- pop-up menu files not
- stream files mentioned earlier may be included in the auxiliary data directory instead of the
- FIG. 2 illustrates data storage areas of an optical disc according to the present invention.
- the optical disc includes a file system information area occupying the
- system information for managing the entire file system information area In the file system information area, system information for managing the entire file system information area, system information for managing the entire file system information area, and a database area occupied between the file system information area and the stream area.
- system information for managing the entire file system information area In the file system information area, system information for managing the entire file system information area, system information for managing the entire file system information area, and a database area occupied between the file system information area and the stream area.
- the general files, PlayList files, and clip information files are stored in the stream area.
- the general files, PlayList files, and clip information files are stored in the stream area.
- FIG. 1 are stored in the database area of the disc volume. As discussed above, the
- general files include an index file and an object file, and the PlayList files and clip
- information files include information required to reproduce the AV streams and the text
- subtitle streams stored in the stream area Using the information stroed in the database area
- a user is able to select a specific playback mode and to reproduce the
- main AV and text subtitle streams in the selected playback mode.
- FIG. 3 illustrates a text subtitle and a main image presented on a display screen when a text
- subtitle stream and a main AV stream are reproduced.
- FIG. 4 is a schematic diagram illustrating reproduction control of a main AV clip and text
- a PlayList file includes at least one
- Playltem controlling reproduction of at least one main AV clip and a SubPlayltem
- text subtitle clip 2 shown in FIG. 4 for English and Korean text subtitles may be
- subtitle are displayed on a display screen simultaneously at a particular presentation time.
- display control information e.g.,
- FIG. 5 A to FIG. 5C are required.
- FIG. 5A illustrates a dialog presented on a display screen according to the present invention.
- a dialog represents entire text subtitle data displayed on a display screen during a given
- presentation time hi general, presentation times of the dialog may be represented in
- presentation time stamps For example, presentation of the dialog shown in FIG. 5 A
- a dialog includes at least one line of subtitle text (characters).
- FIG. 5B illustrates regions of a dialog according to the present invention.
- region represents a divided portion of text subtitle data (dialog) displayed on a display
- a dialog includes at least one region
- each region may include at least one line of subtitle text.
- representing a region may be displayed on the display screen according to a region style
- the greater number of regions generally results a lower decoding ratio. For example, the
- maximum number of regions for a dialog may be limited to two in order to achieve a
- FIG. 5C illustrates style information for regions of a dialog according to the present
- Style information represents information defining properties required for
- style information are position, region size, background color, text alignment, text flow
- the style information may be classified into region style
- inline style information (local style information) and inline style information (local style information).
- Region style information defines a region style (global style) which is applied to an entire
- the region style information may contain at least one of a
- region position region size, font color, background color, text flow, text alignment, line
- inline style information defines an inline style (local style) which is
- style information may contain at least one of a font type, font size, font style, and font color.
- the particular portion of text strings may be an entire text line within a region or a
- FIG. 6 A illustrates presentations of text subtitle dialogs on a display screen in presentation
- PTS time stamp
- Dialog #1 has only one region and Text #1 is displayed within this region
- Dialog #2 has Region 1 and Region 2 and Text #1 and Text
- Dialog #3 also has only one region and Text #2 is displayed within this region
- Text #3 is displayed within a region of Dialog #4 between PTS5 to PTS6.
- dialog presentation time information includes dialog presentation time information and dialog text data
- An example of the presentation time information is a set of start PTS start and PTS end, and
- the style information includes region (global) style information and inline (local) style
- FIG. 6B illustrates continuities between text subtitle dialogs being presented on a display
- Dialog #1 and Dialog #2 Display of Text #1 in a region of Dialog #1 is continuous with
- presentation times (PTS intervals) of the dialogs must be
- An indicator (e.g., continuous_presentation_flag) may be included in presentation
- FIG. 7 A illustrates a text subtitle stream file (e.g., 10001.m2ts shown in FIG. 1) according
- It may be formed of an MPEG2 transport stream including a
- TP transport packets
- each sub-set of transport packets form a packet
- PES elementary stream
- DSU dialog style unit
- dialog style segment (DSS). All the remaining PES packets correspond to dialog
- DPUs presentation units
- dialog text data including a region style indicator, inline
- dialog presentation segment DPS
- FIG. 7B illustrates specific information contained within a DPU and a DSU included in a
- a DSU contains information sets
- dialog i addition, a DPU contains dialog text data and dialog presentation information for
- the dialog text data includes text strings to be included in each region of the dialog.
- dialog inline style information to be applied to a particular portion of the text strings, and a
- region style identifier indicating a region style to be applied to each dialog region.
- region style identifier identifies one of the group of region styles defined in the DSU.
- the dialog presentation information includes presentation time information
- the presentation time information may
- presentation start time e.g., PTS_start
- presentation end time e.g., PTS_end
- an indicator e.g., palette_update_flag
- All the data included in a text subtitle stream may be classified into three types of data
- the data could be classified into dialog text data
- composition information composition information, and rendering information, as shown in FIG. 7B.
- the dialog text
- data include text string(s), inline style information, and a region style identifier for each
- the composition information includes presentation time information
- DSU is a part of the composition information, and the region width, region height, font
- a DSU includes a set of region style information (dialog style set) defining a limited
- the region styles defined in a DSU may be limited to 60, and the region styles may be
- region_style_id identified by their region style identifications. Therefore, an author stores a DSU defining only a limited number of region styles in an optical disc.
- region styles identified by their region style identifications (region_style_id). Therefore, an author stores a DSU defining only a limited number of region styles in an optical disc.
- region styles identified by their region style identifications (region_style_id). Therefore, an author stores a DSU defining only a limited number of region styles in an optical disc.
- the disc player may use other region styles defined by an additional set of
- the source is a
- FIG. 8 illustrates a syntax for a text subtitle stream (Text_subtitle_stream ()) according to an
- dialog style unit includes a syntax for a dialog style unit (dialog_style_unit ()) including a set of information
- presentation information and at least one region of dialog text.
- region of dialog text Each region of dialog text
- region style identifier includes a region style identifier, one or more text strings, and inline style information, and
- the region style identifier identifies one of the set of region styles defined in the DSU syntax.
- FIG. 9 A illustrates the syntax for a dialog style unit (dialog_style_unit ()) included in the
- the dialog style unit syntax includes a syntax
- dialog style set (dialog_styleset ()) in which a set of author-defined region styles are
- FIG. 9B illustrates the syntax for a dialog style set (dialog_styleset ()) included in
- the dialog style unit syntax includes a set of
- region style information defining a set of region styles (region_style ()), respectively, and a data field or a flag (player_style_flag) indicating whether the author permitted a player to
- the dialog style set syntax further includes a
- region style identifications are assigned to the set of
- region styles region_style ()
- each region style information represents
- region style identifier included in a DPU for each region includes one of the region style
- region_horizontal__position specifies the horizontal address of the top left pixel of a region
- region_vertical_position specifies the region vertical position
- region_width specifies the horizontal length of the region rectangle from the region
- region_height specifies the vertical length of the
- region_bg_color_index specifies an index value indicating the background color of the
- a text horizontal position (text_horizontal_position) specifies the horizontal
- a text flow (text_flow)
- text_alignment specifies alignment (left, center, or right) of rendered text in the region.
- ont_id indicates the font identification specified in a clip information file.
- font style specifies the style of font for the text in the region, examples of which
- font size specifies the size of font
- font_color_index specifies an index value indicating the
- the player style flag (player_style_flag) shown in FIG. 9B indicates whether au author
- the disc player may be pre-stored in a local data storage of the disc player, for a text subtitle in addition to the author-defined region styles defined in an optical disc. For example, if the value of the
- player style flag is set to lb, the author permits the player to generate and/or use its own set
- FIG. 9C illustrates a syntax for a user changeable style set (user_changeable_styleset ())
- each user control style is configure to change at least one of
- a user is able to change the region style of each region
- the display control of a dialog by the user may be very difficult.
- each region style may be limited to 25. Since the maximum number of the region styles defined in a dialog style set is limited to 60, the total number of the user changeable styles
- DPU defined for a DPU must be less than or equal to 1500.
- region_horizontal_position_direction may include a region horizontal position direction (region_horizontal_position_direction)
- region horizontal position delta (region_horizontal_position_delta) specifying the number of
- the horizontal movement in the unit of pixels.
- the horizontal movement may be any suitable horizontal movement in the unit of pixels.
- the horizontal movement may be any suitable horizontal movement.
- region_vertical_position_directtion may include a region vertical position direction (region_vertical_position_directtion)
- region_vertical_position_delta specifying the number of the vertical
- the vertical movement may be in a downward
- the vertical position direction if the vertical position direction is set to 0 and may be in a upward direction if it is
- a user control style may include a font size change direction (font_size_inc_dec)
- the font size change in unit of pixels For example, the font size
- font_size_inc_dec may be increased if font_size_inc_dec is set to 0 and may be decreased if it is set to 1.
- region styles defined in a dialog style unit, and the number of the set of control styles are
- presentation properties are defined in combination by a single user control style.
- the region horizontal position and font size are not changed separately by two
- the actual property value may be obtained by applying
- Each text subtitle stream includes a DSU defining a
- the set of region styles have different region
- the DSU further defines a set of user control styles for each region style, where
- Each user control style has different user style LDs.
- Each user control style is configured to
- the dialog style set includes a player style flag
- the apparatus includes a packet identifier (PID) filter 5 for separating input
- a video decoding part 20 for decoding the video streams, an
- the text subtitle streams may be extracted from an optical disc or from an additional
- the apparatus additionally includes a
- the switch 6 selects data line A connected to the PID filter 5.
- decoding part 30 include transport * buffers 11, 21, and 31, respectively, for storing stream
- a video plane (VP) 23 and a graphic plane 33 are included in the video decoding part 20 and the graphic decoding part 30, respectively, for converting decoded
- the graphic decoding part 30 includes a
- color look up table (GLUT) 34 for controlling color and transparency levels of the
- SPB subtitle preloading buffer
- all the text subtitle streams may be
- the size of the SPB 41 should be greater than or equal to 0.5 megabytes for preloading a 0.5
- size of the SPB 41 should be greater than or equal to 1 megabytes. The size of the SPB 41
- the text subtitle decoding part 40 shown in FIG. 10 further includes a font preloading
- control of the SPB 41 and the FPB 410 could be quite
- the text subtitle decoding part 40 further includes a text
- subtitle decoder 42 which decodes each text subtitle stream stored in the SPB 41, a graphic
- CLUT color look up table
- the text subtitle decoding part 40 further includes a local data storage 45 which stores a
- player style set defining a set of player styles to be selectively used when reproducing a text
- the local data storage 45 may further
- This user changeable set may be similar to the user
- each player style represents a region style specifying
- region background color index text horizontal position, text vertical position, text flow, text
- the set of player styles stored in the local data storage 45 is used independent of a set
- each player style is configured to redefine at least
- region presentation properties which are initially defined by a region style defined in
- a DSU For example, if a region style defined in the DSU defines a complete set of region
- presentation properties including font identification and a player style redefines the font
- region style are used in combination.
- each player style may be configured to change at
- region presentation properties which are initially defined by a region style
- a player style may specify a direction and a magnitude of a
- style set is similar to the user changeable set, an example of which is illustrated in FIG. 9C.
- FIG. 11 illustrates a method of decoding a text subtitle stream recorded on an optical disc
- player_style_flag included in a DSU to determine whether the use of a player style set
- the text subtitle decoder 42 independently determines whether to use any one of a set of player styles defined in the
- the text subtitle decoder 42 may compare the set of
- step SI 12 If the set of player styles are not determined
- step SI 12 the region styles recorded on the optical disc are used (Si l l).
- step SI 12 if the set of player styles are determined to be used in step SI 12, the text subtitle
- decoder 42 may use them independently or in combination with the set of region styles
- the text subtitle decoder 42 may use a region style
- region style he or she may input a command for changing the region style.
- DSU at least one of the region horizontal position, region vertical position, and font size
- the apparatus shown in FIG. 10 further includes an image super ⁇ mposition part 50 which
- the video decoding part 20 may be displayed as a background of the display screen, and
- the images outputted from the graphic decoding part 30 and/or text subtitle decoding part 40 may be superimposed over the video images in a predetermined order. For example, if the
- output images of the graphic decoding part 30 are presentation graphic images, these images
- first adder 52 may be initially superimposed over the video images by a first adder 52, and subsequently,
- the text subtitle images from the text subtitle decoding part 40 may be superimposed over
- decoding part 30 are interactive graphic images, the text subtitle images from the text
- subtitle decoding part 40 may be initially superimposed over the video images by the first
- the apparatus shown in FIG. 10 further includes a system decoder 4 for decoding
- input transport streams e.g., MPEG transport streams
- microprocessor 3 for converting MPEG transport streams into MPEG transport streams
- a plurality of user control styles are defined for each
- Each user control style is selectable by a user and is configured to change the region presentation properties specified by a corresponding
- region style Therefore, a user can have options of selecting one of a variety of user control
Abstract
Description
Claims
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BRPI0507542-4A BRPI0507542A (en) | 2004-02-10 | 2005-01-12 | physical recording medium for reproducing text subtitle streams, method and apparatus for decoding a text subtitle stream |
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US7643732B2 (en) | 2010-01-05 |
US20050207736A1 (en) | 2005-09-22 |
US20070127886A1 (en) | 2007-06-07 |
JP2007522596A (en) | 2007-08-09 |
WO2005074400A3 (en) | 2005-10-06 |
BRPI0507542A (en) | 2007-07-03 |
EP1714281A2 (en) | 2006-10-25 |
KR20070028326A (en) | 2007-03-12 |
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