Recording medium and method and apparatus for decoding text subtitle streams

1. A recording medium including text subtitle stream recorded by a recording apparatus and configured to be reproduced by a reproducing apparatus, the recording medium comprising:

the text subtitle stream recorded by the recording apparatus and configured to be reproduced by a reproducing apparatus including a style segment defining at least one region style to be applied to at least one region, the style segment further defining at least one set of user control style for each of the at least one region style, each of the at least one set of user control style including at least one user control style being selectable for changing at least one of region presentation properties specified by a corresponding region style,

wherein the style segment includes a player style flag recorded by the recording apparatus and configured to be reproduced by a reproducing apparatus indicating whether a player is permitted to use its own player style in addition to the at least one region style defined in the style segment of the text subtitle stream in the recording medium,

wherein each of the at least one set of user control style specifies a direction and a delta of a change in the at least one of region presentation properties specified by the corresponding region style.

2. The recording medium of claim 1 , wherein the style segment includes a data field indicating a number of the at least one region style.

3. The recording medium of claim 2 , wherein the number of the at least one region style is less than or equal to 60.

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

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

6. 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.

7. The recording medium of claim 1 , wherein each of the at least one user control style specifies a direction and a delta 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.

8. A recording medium including text subtitle stream recorded by a recording apparatus and configured to be reproduced by a reproducing apparatus, the recording medium comprising:

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

wherein the style segment includes a player style flag indicating whether a player is permitted to use its own player style in addition to the at least one region style defined in the style segment of the text subtitle stream in the recording medium,

wherein each of the at least one set of user control style specifies a direction and a delta of a change in the at least one of region presentation properties specified by the corresponding region style.

9. 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 style segment defining at least one region style and at least one presentation segment, each of the at least one presentation segment containing at least one region of text and being linked to one of the at least one region style, the style segment further defining at least one set of user control style for each of the at least one region style, each of the at least one set of user control style including at least one user control style being selectable for changing at least one region presentation property specified by a corresponding region style; and

decoding each of the at least one presentation segment using the linked at least one region style and one of the at least one set of user control style,

wherein the style segment includes a player style flag indicating whether a player is permitted to use its own player style in addition to the at least one region style defined in the style segment of the text subtitle stream in the recording medium,

wherein each of the at least one set of user control style specifies a direction and a delta of a change in the at least one of region presentation properties specified by the corresponding region style.

10. The method of claim 9 , 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.

11. The method of claim 9 , wherein each of the at least one user control style specifies a direction and a delta 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.

12. The method of claim 9 , further comprising:

receiving a user command which selects one of the set of user control styles;

obtaining final region presentation properties by applying the direction and the delta of a change specified by the selected user control style to original region presentation properties specified by the corresponding region style; and

decoding the presentation segment using the final region presentation properties.

13. 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, the loaded text subtitle stream including a style segment defining at least one region style and at least one presentation segment, each of the at least one presentation segment containing at least one region of text and being linked to one of the at least one region style, the style segment further defining at least one set of user control style for each of the at least one region style, each of the at least one set of user control style including at least one user control style being selectable for changing at least one of region presentation properties specified by a corresponding region style; and

a text subtitle decoder configured to decode each of the at least one presentation segment using the linked region style and one of the at least one user control style,

wherein the style segment includes a player style flag indicating whether a player is permitted to use its own player style in addition to at least one region style defined in the style segment of the text subtitle stream in the recording medium,

wherein each of the at least one set of user control style specifies a direction and a delta of a change in the at least one of region presentation properties specified by the corresponding region style.

14. The apparatus of claim 13 , wherein the subtitle loading buffer is configured to load the text subtitle stream including the style segment which includes a data field indicating a number of the set of the at least one user control style defined in the style segment for each of the least one region style.

15. The apparatus of claim 14 , wherein the subtitle loading buffer is configured to load the text subtitle stream including the style segment which defines the at least one set of user control style, the number of the at least one set of user control style defined for each of the at least one region style is less than or equal to 25.

16. The apparatus of claim 13 , wherein the text subtitle decoder is configured to receive a user command which selects one of the set of user control styles, obtain final region presentation properties by applying the direction and the delta of a change specified by the selected user control style to original region presentation properties specified by the corresponding region style; and decode the presentation segment using the final region presentation properties.

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

a pickup configured to record data on a recording medium; and

a controller configured to control the pickup to record the text subtitle stream, the text subtitle stream including a style segment defining at least one region style to be applied to at least one region, the style segment further defining at least one set of user control style for each of the at least one region style, each of the at least one set of user control style including at least one user control style being selectable for changing at least one of region presentation properties specified by a corresponding region style,

wherein the style segment includes a player style flag indicating whether a player is permitted to use its own player style in addition to the at least one region style defined in the style segment of the text subtitle stream in the recording medium,

wherein each of the at least one set of user control style specifies a direction and a delta of a change in the at least one of region presentation properties specified by the corresponding region style.

18. The apparatus of claim 17 , wherein the controller is configured to control the pickup to record the text subtitle stream, the text subtitle stream including the style segment which includes a data field indicating a number of the at least one set of user control style defined in the style segment for each of the at least one region style.

19. The apparatus of claim 18 , wherein the controller is configured to control the pickup to record the text subtitle stream, the text subtitle stream including the style segment which defines the at least one set of user control style, the number of the at least one set of user control style defined for each of the at least one region style is less than or equal to 25.

20. An apparatus for reproducing text subtitle stream, the apparatus comprising:

a pickup configured to reproduce data recorded on a recording medium; and

a controller configured to control the pickup to reproduce the text subtitle stream, the text subtitle stream including a style segment defining at least one region style to be applied to at least one region, the style segment further defining at least one set of user control style for each of the at least one region style, each of the at least one set of user control style being selectable for changing at least one of region presentation properties specified by a corresponding region style,

wherein the style segment includes a player style flag indicating whether a player is permitted to use its own player style in addition to the at least one region style defined in the style segment of the text subtitle stream in the recording mediums,

wherein each of the at least one set of user control style specifies a direction and a delta of a change in the at least one of region presentation properties specified by the corresponding region style.

21. The apparatus of claim 20 , wherein the controller is configured to control the pickup to reproduce the text subtitle stream, the text subtitle stream including the style segment which includes a data field indicating a number of the at least one set of user control style defined in the style segment for each of the at least one region style.

22. The apparatus of claim 21 , wherein the controller is configured to control the pickup to reproduce the text subtitle stream, the text subtitle stream including the style segment which defines the at least one set of user control style, the number of the at least one set of user control style defined for each of the at least one region style is less than or equal to 25.