Methods and apparatuses for managing reproduction of text subtitle data

• US 8,429,532 B2
• Filed: 02/15/2007
• Issued: 04/23/2013
• Est. Priority Date: 05/03/2004
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yoo, Jea Yong, Kim, Byung Jin, Seo, Kang Soo
• Primary Examiner(s): Lo, Weilun
• Assistant Examiner(s): CHUONG, TRUC T
• Application Number:
  US11/706,382
• Publication Number:
  US 20070160342A1
• Time in Patent Office: 2,259 Days
• Field of Search: 715200-203, 715/716, 715/719, 715722-723
• US Class Current: 715/723
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 27/3027 used signal is digitally coded

Abstract

In one embodiment, the method includes, receiving at least one text subtitle stream from an external source. Each text subtitle stream includes a style segment and at least one presentation segment associated with the style segment. The style segment includes at least one set of style information, and each set of style information provides region positioning information for positioning a region in an image and a text box including information for positioning a text box in the region. The presentation segment includes at least one region subtitle information, and the region subtitle information includes text subtitle data and a region style identifier. The region style identifier identifies one of the sets of style information in the style segment to apply to the text subtitle data. The text subtitle stream is decoded using style information including region positioning information and text box positioning information.

Claims

1. A method of reproducing text subtitle streams, the method comprising:

reading at least one text subtitle stream including a style segment and a plurality of presentation segments to which the style segment is applied, the style segment being included in a first packet of the text subtitle stream, the presentation segments being respectively included in a plurality of packets which follow the first packet,

the style segment including at least one set of style information, the at least one set of style information including region positioning information for positioning a region in an image, text box positioning information for positioning a text box in the region, and text flow information indicating character progression and line progression of text subtitle data, and

each presentation segment including field information and at least one region subtitle, the field information including presentation start time and presentation end time of the corresponding presentation segment, each region subtitle including the text subtitle data and a region style identifier, the region style identifier identifying one of the at least one set of style information in the style segment to apply to the text subtitle data, identical text flow information being applied to each region subtitle in the corresponding presentation segment when the presentation segment includes a plurality of region subtitles; and

decoding the at least one presentation segment based on the region style identifier of the at least one presentation segment.

2. The method of claim 1, wherein the region positioning information includes a horizontal position and a vertical position of the upper left corner of the region in the image.

3. The method of claim 2, wherein

the at least one set of style information further includes region size information indicating a height of the region and a width of the region;

and

the at least one set of style information further includes an indicator of a background color for the region.

4. The method of claim 1, wherein the text box positioning information includes a position of an upper left corner of the text box in the region.

5. The method of claim 4, wherein the text box positioning information includes a horizontal position and a vertical position of the upper left corner of the text box in the region;

and

the at least one set of style information further includes text box size information indicating a height of the text box and a width of the text box, text alignment information indicating how to align text subtitle data in the text box, line space information indicating a spacing to employ between lines of text subtitle data in the text box, a font identifier identifying a font file recorded on the recording medium to use in reproducing text subtitle data in the text box, a font style indicator indicating a font style to apply to text subtitle data in the text box, font size information indicating a font size to apply to text subtitle data in the text box, and font color information indicating a color to apply to text subtitle data in the text box.

6. The method of claim 1, wherein the at least one set of style information includes user changeable information, the user changeable information indicating a horizontal direction that a user may move the region, a vertical direction the user may move the region, whether the user may one of increase and decrease the font size, a horizontal direction the user may move the text box, a vertical direction the user may move the text box, whether the user may one of increase and decrease the height of the text box, whether the user may one of increase and decrease the width of the text box, and whether the user may one of increase and decrease the spacing to employ between lines of text subtitle data in the text box.

7. The method of claim 1, wherein the at least one text subtitle stream is downloaded from an external source.

8. The method of claim 1, the method further comprising:

reading a playlist including at least one playitem and at least one subplayitem, the playitem including management information for managing reproduction of a main at least one of Audio and Video stream, the subplayitem including management information for managing reproduction of the text subtitle stream, one of the at least one subplayitem indicating multi clips including the text subtitle stream for different languages.

9. The method of claim 1, wherein the decoding process includes,

rendering the text subtitle data into bitmap object in the region according to rending information including at least the text box positioning information;

and

composing the rendered bitmap object in the region of an image according to composing information including at least the region positioning information.

10. A method of recording text subtitle streams, the method comprising:

recording at least one text subtitle stream including a style segment and a plurality of presentation segments to which the style segment is applied, the style segment being included in a first packet of the text subtitle stream, the presentation segments being respectively included in a plurality of packets which follow the first packet,

the style segment including at least one set of style information, the at least one set of style information including region positioning information for positioning a region in an image, text box positioning information for positioning a text box in the region, and text flow information indicating character progression and line progression of text subtitle data, and

each presentation segment including field information and at least one region subtitle, the field information including presentation start time and presentation end time of the corresponding presentation segment, each region subtitle including the text subtitle data and a region style identifier, the region style identifier identifying one of the at least one set of style information in the style segment to apply to the text subtitle data, identical text flow information being applied to each region subtitle in the corresponding presentation segment when the presentation segment includes a plurality of region subtitles.

11. The method of claim 10, wherein the region positioning information includes a horizontal position and a vertical position of the upper left corner of the region in the image.

12. The method of claim 10, wherein the text box positioning information includes a position of an upper left corner of the text box in the region.

13. The method of claim 10, wherein the at least one text subtitle stream is downloaded from an external source.

14. The method of claim 10, the method further comprising:

recording a playlist including at least one playitem and at least one subplayitem, the playitem including management information for managing reproduction of a main at least one of Audio and Video stream, the subplayitem including management information for managing reproduction of the text subtitle stream, one of the at least one subplayitem indicating multi clips including the text subtitle stream for different languages.

15. The method of claim 10, wherein the text subtitle data is rendered into bitmap object in the region according to rending information including at least the text box positioning information;

and

the rendered bitmap object is composed in the region of an image according to composing information including at least the region positioning information.

16. A system for decoding text subtitle stream, the system comprising:

a preloading buffer configured to preload at least one text subtitle stream;

a text subtitle decoder configured to decode the text subtitle stream including a style segment and a plurality of presentation segments to which the style segment is applied, the style segment being included in a first packet of the text subtitle stream, the presentation segments being respectively included in a plurality of packets which follow the first packet,

the style segment including at least one set of style information, the at least one set of style information including region positioning information for positioning a region in an image, text box positioning information for positioning a text box in the region, and text flow information indicating character progression and line progression of text subtitle data, and

each presentation segment including field information and at least one region subtitle, the field information including presentation start time and presentation end time of the corresponding presentation segment, each region subtitle including the text subtitle data and a region style identifier, the region style identifier identifying one of the at least one set of style information in the style segment to apply to the text subtitle data, identical text flow information being applied to each region subtitle in the corresponding presentation segment when the presentation segment includes a plurality of region subtitles.

17. The system of claim 16, wherein the region positioning information includes a horizontal position and a vertical position of the upper left corner of the region in the image.

18. The system of claim 16, wherein the text box positioning information includes a position of an upper left corner of the text box in the region.

19. The system of claim 16, wherein the at least one text subtitle stream is downloaded from an external source.

20. The system of claim 16, wherein the controller is further configured to read a playlist including at least one playitem and at least one subplayitem, the playitem including management information for managing reproduction of a main at least one of Audio and Video stream, the subplayitem including management information for managing reproduction of the text subtitle stream, one of the at least one subplayitem indicating multi clips including the text subtitle stream for different languages.

21. The system of claim 16, wherein the decoder is configured to render the text subtitle data into bitmap object in the region according to rending information including at least the text box positioning information, and

compose the rendered bitmap object in the region of an image according to composing information including at least the region positioning information.

22. An apparatus for recording a text subtitle stream, the apparatus comprising:

a controller configured to record at least one text subtitle stream in a non-transitory computer recording medium, the at least one text subtitle stream including a style segment and a plurality of presentation segments to which the style segment is applied, the style segment being included in a first packet of the text subtitle stream, the presentation segments being respectively included in a plurality of packets which follow the first packet,

the style segment including at least one set of style information, the at least one set of style information including region positioning information for positioning a region in an image, text box positioning information for positioning a text box in the region, and text flow information indicating character progression and line progression of text subtitle data, and

each presentation segment including field information and at least one region subtitle, the field information presentation start time and presentation end time of the corresponding presentation segment, each region subtitle information including text subtitle data and a region style identifier, the region style identifier identifying one of the at least one set of style information in the style segment to apply to the text subtitle data, identical text flow information being applied to each region subtitle in the corresponding presentation segment when the presentation segment includes a plurality of region subtitles.

23. The apparatus of claim 22, wherein the region positioning information includes a horizontal position and a vertical position of the upper left corner of the region in the image.

24. The apparatus of claim 22, wherein the text box positioning information includes a position of an upper left corner of the text box in the region.

25. The apparatus of claim 22, wherein the at least one text subtitle stream is downloaded from an external source.

26. The apparatus of claim 22, wherein the controller is further configured to record a playlist including at least one playitem and at least one subplayitem, the playitem including management information for managing reproduction of a main at least one of Audio and Video stream, the subplayitem including management information for managing reproduction of the text subtitle stream, one of the at least one subplayitem indicating multi clips including the text subtitle stream for different languages.

27. The apparatus of claim 22, wherein the text subtitle data is rendered into bitmap object in the region according to rending information including at least the text box positioning information;

and

the rendered bitmap object is composed in the region of an image according to composition information including at least the region positioning information.