| 摘要 |
A system and method for signaling and indicating track relationship infor mation in media files. The present invention provides a mechanism for signal ing the information of layered track groups and the information of MDC track groups, as well as a mechanism for signaling track relationship information in an efficient way. In local playback or unicast streaming applications, t o select an independently decodable track for a certain media type, the info rmation of alternate track groups is first found via the track relation box, and one track is selected from an alternate track group for the media type. If stream switching is desired, the switching track group information is fo und via the track relation box. In multicast applications with scalable or M DC streams, the tracks in a layered or MDC group are found via the track rel ation box and selected among all the layered or MDC groups.
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