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AssigneeThomson Licensing
InventorsPeter Jax, Sven Kordon
Estimating the term…
A two-layer hierarchical audio bit stream can have a frame-based structure for the base layer bit stream and can be decoded independently from a higher layer and the decoding can start following every sync header. In the extension layer bit stream the frame structure may not be reflected on bit stream level. To facilitate seek operations with such highly compressed extension-layer data, the header of the extension layer bit stream comprises an FAT table with seek target positions. Because there are fewer entry points in the enhancement layer than sync headers in the base layer, a re-synchronisation and some base layer frames are required to start decoding of the enhancement layer and to generate the full audio quality. Three seeking ways of seeking are described, of which each one offers a different compromise between seeking accuracy, re-synchronisation latency and audio quality.
1-2. (canceled)
A method for searching in a layered hierarchical audio or video hit stream followed by replay, said layered bit stream including a base layer which can be decoded separately starting from base layer entry points, and including at least one enhancement layer which cannot be replayed without re-synchronized data from said base layer and which has fewer entry points than said base layer, said method comprising the steps:
An apparatus for searching in a layered hierarchical audio or video hit stream followed by replay, said layered bit stream including a base layer which can be decoded separately starting from base layer entry points, and including at least one enhancement layer which cannot be replayed without re-synchronized data from said base layer and which has fewer entry points than said base layer, said apparatus comprising means being, adapted for:
Dependencies are inferred from the claim text.