Patent ID: 7609948
Filing Date: 2009-10-27
Classification: G11B,H04N

Abstract:
1. A playback apparatus for playing back an AV stream and a text subtitle stream in synchronization with each other in accordance with play list information recorded in a recording medium, the play list information includes one or more pieces of playback section information, each piece of playback section information includes information indicating a file name of stream information associated with the AV stream, information indicating a playback start point and a playback end point of the AV stream, and a stream number table that indicates one or more text subtitle streams that can be played back in synchronization with the AV stream, and a font identifier is written in the stream information, the playback apparatus comprising: a buffer for storing font data; a preload unit operable to read font data indicated by the font identifier written in the stream information from the recording medium, and preload the font data into the buffer, before the AV stream is played back in accordance with the play list information; a register set storing therein a plurality of flags which indicate, for each language, whether or not a capability to process a text subtitle stream corresponding to a display method unique to said each language is present; a judging unit operable to judge whether or not the display method unique to said each language corresponding to each text subtitle stream can be processed, by referring to each flag that matches language attributes of each text subtitle stream; a selecting unit operable to select, from among the one or more text subtitle streams indicated by the playback section information, a text subtitle stream that corresponds to a display method judged to be able to be processed by the judging unit; and a text subtitle decoder operable to obtain a text subtitle by expanding a text code contained in the selected text subtitle stream into a bit map using the preloaded font data.