Patent ID: 8737822

Claim:
A playback apparatus comprising: obtaining means for obtaining (i) playback management information including first information having a main playback path indicating a position of an AV stream file recorded on a recording medium and (ii) second information having a plurality of sub playback paths such that one sub playback path indicates positions of a plurality of sub files including accompanying data to be played back simultaneously with playback of main image data included in the AV stream file, each of the plurality of sub files being designated in the sub playback paths by a sub play item in time and a sub play item out time common for each sub file and by a specific subclip entry ID uniquely set for each sub file; selection means for selecting accompanying data to be played back, based on an instruction from a user, from among accompanying data to be played back simultaneously with the main image data included in the AV stream file referred to by the main playback path and the accompanying data included in the sub files, the selecting means selecting the accompanying data from supplementary streams or data files different from a main AV stream, referred to by the sub playback paths; reading means for reading, if the accompanying data selected by the selection means is included in a sub file referred to by a sub playback path, the sub file referred to by the sub playback path together with the AV stream file referred to by the main playback path; and playback means for playing back the main image data included in the AV stream file read by the reading means and the accompanying data included in the sub file selected by the selection means and read by the reading means.