Playback apparatus and method, program, recording medium, data structure, and manufacturing method for recording medium

摘要

A playback apparatus includes an obtaining unit obtaining playback management information including a main playback path of a main stream set, a first sub playback path of a first sub-stream set, and a second sub playback path of a second sub-stream set. The first and second sub playback paths are allowed for a predetermined category. A selection-receiver receives a selection of streams as a first combination or a second combination. A reading unit reads the corresponding stream sets according to whether the first or second combination is selected. A playback unit plays back the main stream set and the first or second sub-stream set. The number of files that are readable at one time is predetermined. The sub playback paths are determined so that the number of the files that are readable at one time does not exceed the predetermined number.

主权项

1. A non-transitory recording medium on which data including playback management information to manage playback of at least two streams including a first stream and a second stream is recorded, the playback management information comprising:
a main playback path indicating a position on a time axis of the first stream; a sub playback path indicating a position on the time axis of the second stream; and type information indicating whether the second stream is played back synchronously with the first stream and whether the second stream is multiplexed into a same file as the first stream, wherein the main playback path includes video data and interactive graphics, and wherein the playback management information satisfies:
a first condition that a type of the sub playback path corresponds to a set of sub playback path types of a predetermined application media category among a plurality of application media categories, anda second condition that the sub playback path is determined so that a number of files readable at one time does not exceed a predetermined number, and wherein the inclusion of the interactive graphics in the main playback path prohibits inclusion of preloading interactive graphics in the sub playback path.