| 摘要 |
Encapsulating scalable tiled timed media data comprising timed samples, where each timed sample comprises a first layer 600 and a second layer 601 and one of the layers comprises a plurality of subsamples T1, T2 represented by coding units. The method comprises obtaining a subsample of one timed sample and creating a track comprising the obtained subsample. The created track is independently encapsulated in at least one media segment file, said media segment file comprising mapping metadata 611 providing information about the obtained subsample relative to the timed samples and the layer it belongs to. Preferably the metadata groups samples in two ways, the first 613 being according to the pattern of coding units 621-627 making up subsamples and the second grouping 614 according to mapping of coding units to scalable layers or tiers. The invention relates to a Dynamic Adaptive Streaming HTTP (DASH) compliant encapsulated file format based on the Base Media File Format (BMFF) that can efficiently stream just a region of interest or HEVC tile T1, T2 within a scalable video stream. A second independent method claim of encapsulating partitioned media data creates a media segment file comprising chunks of coding units representing the same subsample. |
