Patent ID: 8280232
Filing Date: 2012-10-02
Classification: G11B,H04N

Abstract:
1. A playback apparatus that performs Picture in Picture playback and mixing, the Picture in Picture playback being performed using a primary video stream and a secondary video stream in accordance with main playback section information and sub playback section information that constitute play list information, the mixing being performed using a primary audio stream and a secondary audio stream, the main playback section information including time information that indicates a start point and an end point of a playback section of the primary video stream, and a stream entry table, the sub playback section information including time information that indicates a start point and an end point of a playback section of the secondary video stream, the stream entry table including entries of secondary video streams that are permitted to be played among a plurality of secondary video streams, entries of secondary audio streams that are permitted to be played among a plurality of secondary audio streams, and combination information, the combination information indicating secondary audio streams that are allowed to be combined with a secondary video stream, the playback apparatus comprising: when a stream number of a current secondary video stream changes, the playback apparatus judges whether or not the stream number of the current secondary audio stream stored in the second stream number register satisfies a predetermined condition, the predetermined condition being satisfied when the combination information indicates that a current secondary audio stream is allowed to be combined with a current secondary video stream with a stream number stored in the first stream number register, and when a result of the judgment is affirmative, the playback apparatus retains the current secondary audio stream, and if the result is negative, the playback apparatus selects a new secondary audio stream.