US20070071411A1 - Recording medium and recording and reproducing methods and apparatuses - Google Patents

Recording medium and recording and reproducing methods and apparatuses Download PDF

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US20070071411A1
US20070071411A1 US11606278 US60627806A US2007071411A1 US 20070071411 A1 US20070071411 A1 US 20070071411A1 US 11606278 US11606278 US 11606278 US 60627806 A US60627806 A US 60627806A US 2007071411 A1 US2007071411 A1 US 2007071411A1
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subtitle
information
style
text
position
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US11606278
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Kang Seo
Byung Kim
Jea Yoo
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Seo Kang S
Kim Byung J
Yoo Jea Y
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41Structure of client; Structure of client peripherals
    • H04N21/426Characteristics of or Internal components of the client
    • H04N21/42646Characteristics of or Internal components of the client for reading from or writing on a non-volatile solid state storage medium, e.g. DVD, CD-ROM
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
    • H04N21/432Content retrieval operation from a local storage medium, e.g. hard-disk
    • H04N21/4325Content retrieval operation from a local storage medium, e.g. hard-disk by playing back content from the storage medium
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
    • H04N21/433Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4334Recording operations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47End-user applications
    • H04N21/488Data services, e.g. news ticker
    • H04N21/4884Data services, e.g. news ticker for displaying subtitles
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/84Television signal recording using optical recording
    • H04N5/85Television signal recording using optical recording on discs or drums
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/79Processing of colour television signals in connection with recording
    • H04N9/80Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/82Transformation 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
    • H04N9/8205Transformation 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
    • H04N9/8233Transformation 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

Abstract

In one embodiment, the data structure includes at least one text subtitle stream including text data for a text subtitle and style information containing user selectable style information. The style information includes at least one set of display properties of the text subtitle and the user selectable style information specifies which of the display properties are allowed to be changed

Description

  • [0001]
    This application is a continuation of U.S. patent application Ser. No. 10/911,731 filed on Aug. 5, 2004, the entirety of which hereby is incorporated herein by reference.
  • [0002]
    This application claims the benefit of Korean Patent Application No. 10-2004-0000633, filed on Jan. 6, 2004, which is hereby incorporated by reference.
  • BACKGROUND OF THE INVENTION
  • [0003]
    1. Field of the Invention
  • [0004]
    The present invention relates to a recording medium having at least one text subtitle stream for reproduction of images recorded thereon as well as methods and apparatuses for reproduction and recording.
  • [0005]
    2. Discussion of the Related Art
  • [0006]
    Optical discs are widely used as an optical recording medium for recording mass data. Presently, among a wide range of optical discs, a new high density optical recording medium (HD-DVD), such as the Blu-ray Disc (hereafter referred to as “BD”), is under development for writing and storing high definition video and audio data for a long period of time.
  • [0007]
    Currently, global standard technical specifications of the Blu-ray Disc (BD), which is known to be the next generation HD-DVD technology, are under establishment as a next generation optical recording solution that is able to have data significantly surpassing the conventional DVD, along with many other digital apparatuses. Accordingly, optical reproducing apparatuses having the Blu-ray Disc (BD) standards applied thereto are also being developed. However, since the Blu-ray Disc (BD) standards are yet to be completed, there have been many difficulties in developing a complete optical reproducing apparatus.
  • [0008]
    Most particularly, in order to effectively reproduce the data from the Blu-ray Disc (BD), not only information on a structural data file of the data recorded in the Blu-ray Disc (BD), but also information for effectively forming and managing the data file should be systemized and provided. However, in the present Blu-ray Disc (BD) standards, since the standards of the auxiliary data, particularly the subtitle information, are not completely consolidated, there are many restrictions in the full-scale development of a Blu-ray Disc (BD) basis optical reproducing apparatus. And, such restrictions cause problems in reproducing the data stream and providing the data stream to the user.
  • SUMMARY OF THE INVENTION
  • [0009]
    The present invention relates to a recording medium storing a data structure.
  • [0010]
    In one embodiment, the data structure includes at least one text subtitle stream including text data for a text subtitle and style information containing user selectable style information. The style information includes at least one set of display properties of the text subtitle and the user selectable style information specifies which of the display properties are allowed to be changed.
  • [0011]
    Another embodiment of the present invention relates to a method of generating text subtitle streams.
  • [0012]
    In one embodiment, the method includes generating at least one text subtitle stream. Each text subtitle stream includes text data for a text subtitle and style information containing user selectable style information. The style information includes at least one set of display properties of the text subtitle and the user selectable style information specifies which of the display properties are allowed to be changed
  • [0013]
    A still further embodiment relates to an apparatus for reproducing text subtitle streams.
  • [0014]
    In one embodiment, the apparatus includes a driver configured to read data. The data includes at least one text subtitle stream. Each text subtitle stream includes text data for a text subtitle and style information containing user selectable style information. The style information includes at least one set of display properties of the text subtitle and the user selectable style information specifies which of the display properties are allowed to be changed.
  • [0015]
    The present invention relates to additional embodiments of the recording medium and method and apparatus of reproducing the recording medium.
  • [0016]
    Furthermore the present invention relates to methods and apparatuses for generating or creating test subtitle streams, and/or recording test subtitle streams.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0017]
    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 serve to explain the principle of the invention. In the drawings:
  • [0018]
    FIG. 1 illustrates the structure of the files that manage data recorded in an optical disc according to the present invention;
  • [0019]
    FIG. 2 illustrates data storage areas of an optical disc volume according to the present invention;
  • [0020]
    FIG. 3A illustrates a table indicating subtitle display functions that are controllable by a user according to the present invention;
  • [0021]
    FIG. 3B illustrates the fundamental concepts of changing the position and font size of a subtitle according to the present invention;
  • [0022]
    FIGS. 4A to 4C illustrate various examples of changing the position and font size of a subtitle according to the present invention;
  • [0023]
    FIG. 5 illustrates an example of changing the position and font size of a subtitle according to the present invention;
  • [0024]
    FIG. 6 illustrates an example of changing the position and font size of a subtitle at the same time according to the present invention;
  • [0025]
    FIG. 7 illustrates an apparatus of reproducing data streams recorded in an optical disc according to the present invention;
  • [0026]
    FIG. 8A illustrates a user operation mask table stored in an optical disc according to the present invention;
  • [0027]
    FIG. 8B illustrates the subtitle setting information stored in an optical disc according to the present invention; and
  • [0028]
    FIG. 9 illustrates an apparatus for recording and reproducing text subtitle streams according to the present invention.
  • DETAILED DESCRIPTION OF THE INVENTION
  • [0029]
    Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are 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.
  • [0030]
    FIG. 1 illustrates data files for reproduction of images recorded in a Blue-ray (BD) disc according to the present invention. Referring to FIG. 1, at least one BD directory (BDMV) is included in a root directory (root). Each BD directory includes an index file (index.bdmv) and an object file (MovieObject.bdmv), which represent general files that are used to interact with one or more users. Each BD directory further includes three additional file directories that include information required for reproducing the data recorded in the disc. For example, the index file contains an index table which includes information regarding a plurality of selectable menus and titles.
  • [0031]
    The file directories included in each BD directory are a stream directory (STREAM), a play-list directory (PLAYLIST), and a clip information directory (CLIPINF). The stream directory includes video and audio (AV) stream files having a particular format. For example, the AV stream files may be in the format of MPEG2 transport packets, which are often named as “*.m2ts” as shown in FIG. 1. In addition, the AV stream files included in STREAM are also called clip stream files in the BD industry standards.
  • [0032]
    The stream directory further includes at least one subtitle stream, which includes text data for a text subtitle and a set of style information corresponding to a set of user-selectable styles, respectively, may be multiplexed with the AV stream files within the stream directory, or it could exist as independent files within the same directory (STREAM). In the latter case, such independent files may be named as “*.tst”. Each style information includes a unique set of display properties required for displaying the text subtitle within a display screen, and the unique set of display properties included in each style information includes at least one of a horizontal position, a vertical position, and a font size of the text subtitle within the display screen. The text subtitle further includes style information corresponding to a default style. This default style information includes a default set of display properties required when initially displaying the text subtitle within the display screen by default. More details to these will be explained later with reference to FIG. 6.
  • [0033]
    Next, the clip information directory (CLIPINF) includes clip information files (e.g., 01000.clpi and 02000.clpi shown in FIG. 1) that correspond to the AV stream files, respectively. Each clip information file includes property and timing information of a corresponding AV stream file, where the timing information includes information that maps Presentation Time Stamp (PTS) with Source Packet Number (SPN) using Entry Point Map. In the industry standards, each pair of an AV stream file and its corresponding clip information file is often designated as “a clip”. For example, 01000.clpi included in CLIPINF includes property information and timing information of 01000.m2ts included in STREAM, and the pair of 01000.clpi and 01000.m2ts forms a clip.
  • [0034]
    Referring back to FIG. 1, the play-list directory (PLAYLIST) includes one or more play-list files (*.mpls), where each play-list file includes at least one play-item which designates the time for play-back of a clip. A play-item includes information designating beginning and ending times (In-Time and Out-Time) for play-back of a clip, which is designated by “Clip_Information_File_Name” within the play-item. Therefore, a play-list file represents basic information required for play-back of one or more clips designated by a combination of play-items. In addition, the play-list file may further include one or more sub-play-items, which may or may not be synchronized with the play-items within the play-list file.
  • [0035]
    According to the present invention, a subtitle represents caption information of images represented in a predetermined language. For example, when a user selects one of available subtitles while viewing images on a display screen, corresponding caption information is displayed on a predetermined portion of the display screen. When a subtitle is text information, the subtitle is called a text subtitle. One of the essential features of the present invention is to allow one or more users to change display properties of a subtitle when playing-back AV streams prerecorded in a high-density optical disc. More details to such change in display properties of the subtitle will be described later in this section.
  • [0036]
    FIG. 2 illustrates data storage areas of an optical disc volume, in which the data files shown in FIG. 1 are prerecorded. As shown in the figure, the disc volume includes a file system information area occupying the inmost portion of the disc volume, an AV stream area occupying the outmost portion of the disc volume, and a database area between the file system information area and the AV stream area. In file system information area system information that manages the entire data files is prerecorded. Next, audio-video data (AV streams) and at least one subtitle stream are prerecorded in the AV stream area. The general files, play-list files, and clip-information files are prerecorded in the database area of the disc volume. As discussed above, the general files include index and object files, and the play-list files and clip-information files include information required for play-back of the AV streams prerecorded in the AV stream area. A user is able to select a specific play-back mode and to play-back desired AV streams in the selected play-back mode using the information stored in the database area.
  • [0037]
    FIG. 3A illustrates a table indicating subtitle display properties (display functions) selected to be controlled by a user according to the present invention. Referring to FIG. 3A, a list of subtitle display properties include fade-in or fade-out, change position, scrolling, font size, font color, font type (e.g., Gothic and etc.), font style (e.g., Bold and etc.), background color, text flow, text alignment, and line space functions. Basically, all the subtitle display properties listed in FIG. 3A are changeable by an author (who records data in a disc), and they are then classified into user-changeable and user-unchangeable display properties.
  • [0038]
    According to the present invention, the user-changeable subtitle display properties are limited to at least one of a position and a font size of a subtitle. The position and font size of a subtitle significantly affect the user's view of the images on a display screen. Therefore, it would be very convenient for any user to be able to change the position and the font size of the subtitle. Any change of other subtitle display properties such as scrolling and font color parameters may rather seriously impair the display quality of the whole images being displayed.
  • [0039]
    However, the user's control of the position and font size of the subtitle may be limited during a specified play-back time by limiting the user operation (UO). One of the main reasons for limiting the user's control is that the position and font size of the subtitles may not be properly changed when playing-back a certain type of AV streams. The information allowing or limiting the user's control of the position and font size of the subtitles is included in the disc, and more details to this will be described later with reference to FIG. 8A.
  • [0040]
    In addition, changes of the position and font size of the subtitle must be within the permitted ranges. For example, the position and font size of the subtitles must be limited such that the displayed subtitle must be within a predefined area within a display screen. In another example, the font size must be chosen such that the entire texts are included within a subtitle area of the screen. The permitted ranges of the position and font size of the subtitles can be predefined by the author and be stored in the disc, or they can be manually set and be changed by a user.
  • [0041]
    FIG. 3B illustrates the fundamental concepts of changing the position and font size of the subtitles according to the present invention. The first example illustrated in FIG. 3B shows the change of the position of the subtitle only, but both of the position and font size are changed in the second example. Although it is not illustrated in FIG. 3B, it is also possible to change the font size of the subtitle without changing the subtitle position. As explained earlier, the changes of the position and/or font size of the subtitle must be limited such that the changes are within permitted ranges.
  • [0042]
    FIGS. 4A to 4C illustrate various examples of changing the position of a subtitle according to the present invention. Referring to FIG. 4A, the predefined positions of a subtitle are bottom position (position No. 1), center position (position No. 2), and top position (position No. 3) within a display screen. The position of the subtitle may be changed between the predefined positions when a request is made by a user. Referring to FIG. 4B, the predefined positions of a subtitle are right position (position No. 4) and left position (position No. 5). Similarly, the position of the subtitle shown in FIG. 4B may be changed between the predefined positions each time a request is made by a user.
  • [0043]
    Reference will now be made in detail to some of the specific methods of changing the subtitle position within an effective area of a display screen. In one method, information indicating a set of predefined positions of a subtitle such as those shown in FIGS. 4A and 4B may be prestored within a disc. Each time a request for changing the subtitle position (e.g., selection of a menu option) is made by a user, the subtitle, which is initially positioned at an initial position (default position), is moved between the predefined positions in a predefined order. The initial position may or may not be any one of the predefined positions. For example, a subtitle may move in the order of the bottom position (position No. 1), center position (position No. 2), top position (position No. 3), right position (position No. 4), and left position (position No. 5). Considering the order of the positions preferred by many users in general, the subtitle may also move in the order of the bottom position (position No. 1), top position (position No. 3), right position (position No. 4), left position (position No. 5), and center position (position No. 2). The number of the predefined positions described above may be predefined by defining the maximum number of the predefined positions, which will be described in more detail later with reference to FIG. 8B.
  • [0044]
    In another method of changing the subtitle position within the display screen, a desired position of a subtitle may be manually selected by a user by using a user interface unit, examples of which are a mouse, a remote control, and a control panel provided at a display device. For example, the user may manually select his or her desired subtitle position by using a cursor which may be controlled by the user interface unit. Alternatively, the user may input coordinate information of a desired subtitle position by pressing the button keys included in the user interface unit.
  • [0045]
    FIG. 4C illustrates another example of changing the position of a subtitle according to the present invention, where the subtitle is for images displayed in a window (e.g., a picture-in-picture window), which occupies only a portion of the display screen. In this case, the subtitle is displayed at a position outside of the window (e.g., position No. 6 shown in FIG. 4C) but within an effective area of the display screen. The specific methods of changing the subtitle position described above with reference to FIG. 4A and FIG. 4B are also applicable in this case.
  • [0046]
    FIG. 5 illustrates an example of changing the position and font size of a subtitle at the same time according to the present invention. In one method, information indicating a set of predefined font sizes (font_size No. 1, font_size No. 2, and font_size No. 3) and a set of predefined positions (position No. 1, position No. 2, and position No. 3), such as those shown in FIG. 5, may be prestored in a disc. Each time a request for changing display setting of the subtitle (e.g., selection of a menu operation) is made by a user, the font size of a subtitle, which is initially displayed at a default font size, is changed between the predefined font sizes in a predefined order. At same time, the subtitle, which is initially positioned at a default position, is also moved between the predefined positions in a predefined order. For example, the font size of the subtitle may change in the order of font_size No. 1, font_size No. 2, and font_size No. 3, and the position may change in the order of position No. 1, position No. 2, and position No. 3, as shown in FIG. 5.
  • [0047]
    In another method, a desired font size and position of a subtitle may be manually selected by a user using a user interface unit (e.g., a remote control and a control panel provided at a display device). For example, the user may manually enter a desired font size and position by using the user interface unit. The number of the predefined positions and font sizes may be predefined by the user by defining the maximum number of positions and the maximum number of font sizes, which will be described in more detail later with reference to FIG. 8B.
  • [0048]
    FIG. 6 illustrates an example of changing the style of a subtitle according to the present invention. A set of a position and a font size of a text subtitle are defined as a style, and a subtitle is initially displayed at a default style (e.g., style No. 1 shown in FIG. 6) when the subtitle streams recorded in a disc are preloaded by a disc player. The default style represents a set of a default position and font size previously determined by an author of the disc, and the information indicating the default style is recorded in the disc.
  • [0049]
    In one specific method of changing the subtitle style according to the present invention, style information indicating a set of predefined user-selectable styles (e.g., Styles No. 2 to N shown in FIG. 6) are stored in an optical disc. When a user selects one of the set of user-selectable styles, the position and font size of the subtitle automatically change to particular position and font size that correspond to the selected style. Alternatively, each time a request for changing the subtitle style (e.g., selection of a menu option) is made by a user, the position and font size of a subtitle is changed between the set of predefined styles in a predefined order. For example, the position and font size of a subtitle may change in the order of style No. 2, style No. 3, style No. 4, . . . , and style No. N, as shown in FIG. 6.
  • [0050]
    In another method, a desired style representing a desired position and font size may be manually defined by a user using a user interface unit as described above in detail. In both methods, the number of user-selectable styles may be limited by defining the maximum number of the styles, which will be described in detail later in this section with reference to FIG. 8B.
  • [0051]
    FIG. 7 illustrates an apparatus of reproducing data streams for reproduction of images recorded in an optical disc according to the present invention. When the optical disc is preloaded, AV streams and at least one subtitle text stream are read from the optical disc. The subtitle stream includes text data for a text subtitle, and display information indicating various display property values set by default for initially displaying the subtitle within a display screen. These display property values set by default include menu language, audio language, subtitle language, subtitle position, subtitle font size, and style. The memory 15 initially stores the style identification of the default style and all other display properties in corresponding registers.
  • [0052]
    The subtitle stream further includes a set of style information corresponding to a set of user-selectable styles. When a user selects one of the user-selectable styles, the memory 15 stores the style identification of the selected style is stored in a corresponding register.
  • [0053]
    For example, the default subtitle position, font size, and style values preloaded from the optical disc are position No. 1, font size No. 1, and style No. 1, and these values are stored in their corresponding registers within the memory 15. In addition, the memory 15 also includes registers for storing user-updated display information when a request for changing the subtitle setting is received. For example, the user-updated subtitle position, font size, and style values are position No. 3, font size No. 2, and style No. 5, and these values are stored in corresponding registers within the memory 15. The updated subtitle setting information are used in the font engine 18 and the AV decoder 17 when playing-back the preloaded subtitle data on a display screen, and these operations are controlled by a controller 12. The memory 15 may be any one of various storages including a RAM and a buffer, all of which could be easily equipped within the disc player.
  • [0054]
    FIG. 8A illustrates a user operation mask table stored in an optical disc according to the present invention. The information included in the table indicates whether to allow a user to change the subtitle setting. The user operation mask table (UO_mask_Table) shown in FIG. 8A may be included in any one of ApplnfoPlayList ( ), PlayItem ( ), ICS ( ), TextSubtitlelnfo ( ) of the play-list files, respectively. Herein, the user operation mask table includes subtitle_position_change_mask field indicating whether to allow changes of the subtitle position, subtitle_font_size_change_mask field indicating whether to allow changes of the subtitle font size, and Subtitle_style_change_mask indicating whether to allow changes of the subtitle style. When any one of these fields is set to “0,” the changes are permitted. On the other hand, when it is set to “1,” the changes are not permitted (prohibited). Therefore, an author could easily set various options for playing-back a subtitle by permitting or prohibiting users to change the position, font size, or style of a subtitle.
  • [0055]
    FIG. 8B illustrates the subtitle setting information stored in a clip information file (*.clpi) according to the present invention. A clip information file includes property and timing information of a corresponding AV stream file, and it includes information such as Cliplnfo ( ), Sequence Info ( ), Programlnfo ( ), CPI ( ), ClipMark ( ), and etc. StreamCodingInfo ( ) included in Programlnfo ( ) contains information indicating the coding type of the corresponding AV stream. Also, StreamCodinglnfo ( ) also includes the subtitle setting information, examples of which are the maximum number of available subtitle positions (Maximum_number_of_positions), the maximum number of available subtitle font sizes (Maximum_number_of_font_sizes), and the maximum number of the user-selectable subtitle styles (Maximum_number_of_styles), all of which may be set by an author. Preferably, the maximum number of the user-selectable styles may be less than or equal to 25 due to the limited data storage space in an optical disc. Therefore, when a user makes a request for changing the subtitle setting into values that are not supported by these limitations, a warning message indicative of “out of supported range” could be provided or the setting could be set to values close to the supported values.
  • [0056]
    FIG. 9 illustrates an optical disc player according to the present invention. The disc player shown in FIG. 9 includes a pickup unit 11 that reads AV stream data and subtitle setting data prerecorded in an optical disc, a servo 14 which controls operation of the pickup unit 11, a signal processor 13 which restores a signal received from the pickup unit 11 or modulates a signal into a recordable signal, a memory 15 which stores control information including the subtitle setting data, and a microprocessor 16 which control operations of the servo 14, the signal processor 13, and the memory 15.
  • [0057]
    In addition, the optical disc player further includes an AV decoder 17 that decodes the AV signal received from the signal processor 13, and an AV encoder 18 which converts an input AV signal into a certain signal, such as MPEG2 transport streams, and transmits the converted signal to the signal processor 13. In addition, the disc player further includes a controller 12, which basically controls operations of each unit included in the disc player. When a request for a change in the subtitle setting is made, the controller 12 determines whether the requested change is within the permitted setting ranges. For example, it determines whether a requested change in the position or font size of a subtitle is within the permitted ranges, or it determines whether such change is within an effective area of the display screen. The controller 12 changes the setting of a subtitle based on these determinations. In addition, the controller 12 also uses the user operation mask table (UO_mask_Table) information when determining whether a change in the subtitle setting for a particular play-back time is permitted or prohibited.
  • [0058]
    It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (38)

  1. 1. A recording medium storing a data structure, the data structure comprising:
    at least one text subtitle stream including text data for a text subtitle and style information containing user selectable style information, the style information including at least one set of display properties of the text subtitle and the user selectable style information specifying which of the display properties are allowed to be changed.
  2. 2. The recording medium of claim 1, wherein the set of display properties comprises at least one of a horizontal position, a vertical position, and a font size of the text subtitle within the display screen.
  3. 3. The recording medium of claim 1, wherein the user selectable style information includes user style identification which identifies the user selectable style information.
  4. 4. A method of reproducing text subtitle streams, the method comprising:
    decoding at least one text subtitle stream, each text subtitle stream including text data for a text subtitle and style information containing user selectable style information, the style information including at least one set of display properties of the text subtitle and the user selectable style information specifying which of the display properties are allowed to be changed.
  5. 5. The method of claim 4, wherein the set of display properties comprises at least one of a horizontal position, a vertical position, and a font size of the text subtitle within the display screen.
  6. 6. The method of claim 4, wherein the user selectable style information includes user style identification which identifies the user selectable style information.
  7. 7. A method of recording text subtitle streams, the method comprising:
    generating at least one text subtitle stream, each text subtitle stream including text data for a text subtitle and style information containing user selectable style information, the style information including at least one set of display properties of the text subtitle and the user selectable style information specifying which of the display properties are allowed to be changed; and
    storing the at least one subtitle stream on a storing device.
  8. 8. The method of claim 7, wherein the set of display properties comprises at least one of a horizontal position, a vertical position, and a font size of the text subtitle within the display screen.
  9. 9. The method of claim 7, wherein the user selectable style information includes user style identification which identifies the user selectable style information.
  10. 10. A method of generating text subtitle streams, the method comprising:
    generating at least one text subtitle stream, each text subtitle stream including text data for a text subtitle and style information containing user selectable style information, the style information including at least one set of display properties of the text subtitle and the user selectable style information specifying which of the display properties are allowed to be changed.
  11. 11. The method of claim 10, the method further comprising:
    storing the at least one subtitle stream on a storing device.
  12. 12. An apparatus for reproducing text subtitle streams, the apparatus comprising:
    a driver configured to read data, wherein the data including at least one text subtitle stream, each text subtitle stream including text data for a text subtitle and style information containing user selectable style information, the style information including at least one set of display properties of the text subtitle and the user selectable style information specifying which of the display properties are allowed to be changed.
  13. 13. The apparatus of claim 12, wherein the set of display properties comprises at least one of a horizontal position, a vertical position, and a font size of the text subtitle within the display screen.
  14. 14. The apparatus of claim 12, wherein the user selectable style information includes user style identification which identifies the user selectable style information.
  15. 15. An apparatus of reproducing text subtitle streams, the apparatus comprising:
    decoder configured to decode at least one text subtitle stream, each text subtitle stream including text data for a text subtitle and style information containing a user selectable style information, the style information including a set of display properties of the text subtitle and the user selectable style information specifying which of the display properties are allowed to be changed; and
    controller configured to control operation of the decoder to decode the at least one text subtitle stream using the style information.
  16. 16. The apparatus of claim 15, wherein the set of display properties comprises at least one of a horizontal position, a vertical position, and a font size of the text subtitle within the display screen.
  17. 17. The apparatus of claim 15, wherein the user selectable style information includes user style identification which identifies the user selectable style information.
  18. 18. An apparatus for recording text subtitle streams, the apparatus comprising:
    a driver; and
    a controller configured to generate at least one text subtitle stream from the recording medium, the at least one text subtitle stream including text data for a text subtitle and style information containing a user selectable style information, the style information including a set of display properties of the text subtitle and the user selectable style information specifying which of the display properties are allowed to be changed and for controlling the driver to store the at least one text subtitle on a storage device.
  19. 19. The apparatus of claim 18, wherein the set of display properties comprises at least one of a horizontal position, a vertical position, and a font size of the text subtitle within the display screen.
  20. 20. The apparatus of claim 18, wherein the user selectable style information includes user style identification which identifies the user selectable style information.
  21. 21. An apparatus for generating text subtitle streams, the apparatus comprising:
    controller configured to generate at least one text subtitle stream from the recording medium, the at least one text subtitle stream including text data for a text subtitle and style information containing a user selectable style information, the style information including a set of display properties of the text subtitle and the user selectable style information specifying which of the display properties are allowed to be changed.
  22. 22. An apparatus of the claim 21, the apparatus further comprising:
    a driver(recording unit) for storing the at least one text subtitle on a storage device.
  23. 23. A recording medium storing a data structure, the data structure comprising:
    at least one text subtitle stream including first and second style information, the first style information indicating display properties of text data included in the text subtitle stream and the second style information indicating changeable value of at least one of the display properties included in the first style information.
  24. 24. The recording medium of claim 23, wherein the changeable value includes direction and variation associated with at least one of the position and font size for being allowed to be changed.
  25. 25. A method of reproducing text subtitle streams, the method comprising:
    decoding at least one text subtitle stream, each text subtitle stream including first and second style information, the first style information indicating display properties of text data included in the text subtitle stream and the second style information indicating changeable value of at least one of the display properties included in the first style information.
  26. 26. The method of claim 25, wherein the changeable value includes direction and variation associated with at least one of the position and font size for being allowed to be changed.
  27. 27. A method of recording text subtitle streams, the method comprising:
    generating at least one text subtitle stream, each text subtitle stream including first and second style information, the first style information indicating display properties of text data included in the text subtitle stream and the second style information indicating changeable value of at least one of the display properties included in the first style information; and
    storing the at least one subtitle stream on a storing device.
  28. 28. The method of claim 27, wherein the changeable value includes direction and variation associated with at least one of the position and font size for being allowed to be changed.
  29. 29. A method of generating text subtitle streams, the method comprising:
    generating at least one text subtitle stream, each text subtitle stream including first and second style information, the first style information indicating display properties of text data included in the text subtitle stream and the second style information indicating changeable value of at least one of the display properties included in the first style information.
  30. 30. The method of claim 29, the method further comprising:
    storing the at least one subtitle stream on a storing device.
  31. 31. An apparatus for reproducing text subtitle streams, the apparatus comprising:
    a driver configure to read data, wherein the data including at least one text subtitle stream, each text subtitle stream including a data area storing at least one text subtitle stream including first and second style information, the first style information indicating display properties of text data included in the text subtitle stream and the second style information indicating changeable value of at least one of the display properties included in the first style information.
  32. 32. The apparatus of claim 31, wherein the changeable value includes direction and variation associated with at least one of the position and font size for being allowed to be changed.
  33. 33. An apparatus of reproducing text subtitle streams, the apparatus comprising:
    decoder configured to decode data including at least one text subtitle stream, each text subtitle stream including first and second style information, the first style information indicating display properties of text data included in the text subtitle stream and the second style information indicating changeable value of at least one of the display properties included in the first style information; and
    controller configured to control operation of the decoder to decode the at least one text subtitle.
  34. 34. The apparatus of claim 33, wherein the changeable value includes direction and variation associated with at least one of the position and font size for being allowed to be changed.
  35. 35. An apparatus for recording text subtitle streams, the apparatus comprising:
    a driver; and
    a controller configured to generate at least one text subtitle stream, each text subtitle stream including first and second style information, the first style information indicating display properties of text data included in the text subtitle stream and the second style information indicating changeable value of at least one of the display properties included in the first style information.
  36. 36. The apparatus of claim 35 wherein the changeable value includes direction and variation associated with at least one of the position and font size for being allowed to be changed.
  37. 37. A apparatus for generating text subtitle streams, the apparatus comprising:
    controller configured to generate at least one text subtitle stream first and second style information, the first style information indicating display properties of text data included in the text subtitle stream and the second style information indicating changeable value of at least one of the display properties included in the first style information.
  38. 38. An apparatus of the claim 37, the apparatus further comprising:
    a driver(recording unit) for storing the at least one text subtitle on a storage device.
US11606278 2004-01-06 2006-11-30 Recording medium and recording and reproducing methods and apparatuses Abandoned US20070071411A1 (en)

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US10911731 US7751688B2 (en) 2004-01-06 2004-08-05 Methods and apparatuses for reproducing subtitle streams from a recording medium
US11606278 US20070071411A1 (en) 2004-01-06 2006-11-30 Recording medium and recording and reproducing methods and apparatuses

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