32. The text subtitle decoder of claim 29 , wherein the text subtitle processor is configured to parse the text subtitle stream into the rendering information including at least a portion of region style information specifying one of the region styles defined by the style segment.
29. A text subtitle decoder for decoding a text subtitle stream recorded on a recording medium, the text subtitle decoder comprising: a subtitle preloading buffer configured to preload the text subtitle stream at once, the text subtitle stream including a style segment defining region styles and a presentation segment including presentation information and text data for at least one region, the text data including a region style identifier and one or more text strings for each region; a font preloading buffer configured to preload related font data at once; a composition buffer configured to store the style segment after the text subtitle stream is preloaded, the style segment including rendering information and composition information; a text subtitle processor configured to parse the presentation information into the composition information and the text data for each region, the parsed composition information being stored in the composition buffer for each region; a buffer configured to store the parsed text data for each region; a text renderer configured to render the text strings into a bitmap object for each region based on the rendering information and the preloaded font data; a bitmap object buffer configured to store the rendered bitmap object for each region; a graphics plane in which the bitmap object stored in the bitmap object buffer for each region is composed according to the composition information; and a presentation controller configured to provide the rendering information and the composition information to the text renderer and the graphics plane, respectively.