Recording medium and method and apparatus for decoding text subtitle streams

• US 20050207736A1
• Filed: 01/12/2005
• Published: 09/22/2005
• Est. Priority Date: 02/10/2004
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Seung Hoon, Park, Sung Wan, Yoo, Jea Yong, Kim, Byung Jin, Seo, Kang Soo, Shim, Young Sun
• Granted Patent: US 7,643,732 B2
• Time in Patent Office: Days
• US Class Current: 386/243
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/42646 for reading from or writing on a non-volatile solid state storage medium, e.g. DVD, CD-ROM
• CPC Class Codes: H04N 21/4316 for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
• CPC Class Codes: H04N 21/4325 by playing back content from the storage medium reproduction of recorded television signals H04N5/76; reproduction of recorded television signals H04N9/79
• CPC Class Codes: H04N 21/434 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 demultiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00
• CPC Class Codes: H04N 21/4884 for displaying subtitles
• CPC Class Codes: H04N 5/781 on disks or drums
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/8233 the additional signal being a character code signal

Abstract

At least one text subtitle stream is recorded on a recording medium. Each text subtitle stream includes a dialog style segment defining a set of region styles and at least one dialog presentation segment. Each dialog presentation segment contains at least one region of dialog text and being linked to at least one of the set of region styles. The dialog style segment further defines a set of user control styles for each region style. Each user control style is selectable by a user and is configured to change at least one of region presentation properties specified by a corresponding region style.

Claims

1. A recording medium for reproduction of text subtitle streams, comprising:

a data area storing at least one text subtitle stream, each text subtitle stream including a dialog style segment defining a set of region styles to be applied to at least one region of dialog text, the dialog style segment further defining a set of user control styles for each region style, each user control style being selectable and configured to change at least one of region presentation properties specified by a corresponding region style.

2. The recording medium of claim 1, wherein the dialog style segment includes a data field indicating a number of the set of region styles.

3. The recording medium of claim 2, wherein the number of the set of region styles is less than or equal to 60.

4. The recording medium of claim 1, wherein the dialog style segment includes a data field indicating a number of the set of user control styles defined in the dialog style segment for each region style.

5. The recording medium of claim 4, wherein the number of the set of user control styles defined for each region style is less than or equal to 25.

6. The recording medium of claim 1, wherein each user control style specifies a direction and a magnitude of a change in the at least one of region presentation properties specified by the corresponding region style.

7. The recording medium of claim 1, wherein the region presentation properties include 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.

8. The recording medium of claim 1, wherein each user cont control style specifies 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, which are specified in the corresponding region style.

9. The recording medium of claim 1, wherein the dialog style segment includes a player style flag indicating whether a player is permitted to generate its own set of player styles in addition to the set of region styles defined in the dialog style segment.

10. A recording medium for reproduction of text subtitle streams, comprising:

a data area storing at least one text subtitle stream, each text subtitle stream including a dialog style segment defining a set of region styles and at least one dialog presentation segment, each dialog presentation segment containing at least one region of dialog text and being linked to at least one of the set of region styles, the dialog style segment further defining a set of user control styles for each region style, each user control style being selectable and configured to change at least one of region presentation properties specified by a corresponding region style.

11. A method for decoding a text subtitle stream recorded on a recording medium, the method comprising:

loading the text subtitle stream into a subtitle loading buffer, the text subtitle stream including a dialog style segment defining a set of region styles and at least one dialog presentation segment, each dialog presentation segment containing at least one region of dialog text and being linked to at least one of the set of region styles, the dialog style segment further defining a set of user control styles for each region style, each user control style being selectable and configured to change at least one region presentation property specified by a corresponding region style; and

decoding each dialog presentation segment using the linked region style and one of the set of user control styles.

12. The method of claim 11, wherein each user control style specifies a direction and a magnitude of a change in the at least one of region presentation properties specified by the corresponding region style.

13. The method of claim 11, wherein the region presentation properties include 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.

14. The method of claim 11, wherein each user control style specifies 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, which are specified in the corresponding region style.

15. An apparatus for decoding a text subtitle stream recorded on a recording medium, the method comprising:

a subtitle loading buffer configured to load the text subtitle stream into a subtitle preloading buffer, the loaded text subtitle stream including a dialog style segment defining a set of region styles and at least one dialog presentation segment, each dialog presentation segment containing at least one region of dialog text and being linked to at least one of the set of region styles, the dialog style segment further defining a set of user control styles for each region style, each user control style being selectable and configured to change at least one of region presentation properties specified by a corresponding region style; and

a text subtitle decoder configured to decode each dialog presentation segment using the linked region style and one of the set of user control styles.