Patent ID: 7881589
Filing Date: 2011-02-01
Classification: G11B,H04N

Abstract:
1. A playback apparatus for playing back a video stream and an audio stream in accordance with playlist information recorded on a recording medium, the playback apparatus characterized by comprising: a configuration register operable to indicate, for each encoding method, a configuration pertaining to whether surround audio can be output; a language setting register operable to indicate a language setting in the playback apparatus; a stream number register operable to store a stream number of an audio stream to be played back; a control unit operable to select one of a plurality of audio streams by executing a predetermined procedure; and a playback unit operable to play back the selected audio stream along with the video stream, wherein the recording medium includes a read-only optical disk and a supplementary recording medium, the playlist information includes one or more pieces of playback section information, the playback section information including playback start time information, playback end time information, and a stream number table, the stream number table indicates a playable audio stream that is recorded on one of the read-only optical disk and the supplementary recording medium, the predetermined procedure includes judging, for each of a plurality of audio streams indicated in the stream number table, which of a plurality of conditions the audio stream satisfies, and selecting an audio stream according to a combination of conditions judged to be satisfied, the plurality of conditions include a first condition, a second condition, and a third condition, the first condition is that an audio stream has been judged to be playable, by comparing an encoding method of the audio stream with the configuration register, the second condition is that a language attribute has been judged to match, by comparing a language code of the audio stream with the language setting register, the third condition is that surround output when performing playback has been judged to be possible, by comparing a channel structure of the audio stream with the configuration register, and if there is no audio stream that satisfies all of the first condition, the second condition, and the third condition, an audio stream among audio streams satisfying the first condition and the second condition is selected to which corresponds an entry in the stream number table at a place that indicates a first priority, and a stream number of the selected audio stream is set in the stream number register in the playback apparatus.