Patent ID: 7865060

Claim:
A non-transitory computer-readable recording medium having playlist information recorded thereon and played by a reproduction apparatus, wherein the playlist information defines a playback section of each of a plurality of digital streams, and includes main-path information and sub-path information, the main-path information designates one of the digital streams as a main stream, and defines a portion of the main stream as a primary playback section, the sub-path information designates another one of the digital streams as a substream, and defines a portion of the substream as a secondary playback section that is to be synchronously played back with the primary playback section, the sub-path information includes synchronous information, the synchronous information includes timing information indicating, on a timeline of the primary playback section, a synchronization point for the synchronous playback of the secondary playback section with the primary playback section, the recording medium further has recorded thereon the one of the plurality of digital streams designated as the substream, together with an entry map, the entry map indicates a plurality of entry points on the substream in one-to-one correspondence with a plurality of entry times on a timeline of the substream, and the playlist information, the substream, and the entry map are grouped into a directory that is uniquely specified by a combination of an organization name of a provider of the substream and an identifier identifying a recording medium storing the main stream to be synchronously played back with the substream.