| 摘要 |
Exemplary generic file storage for scalable media is described. In one implementation, stored scalable media streams are related as nodes of a directed acyclic graph (DAG) in which directed edges between the nodes describe relationships between scalable media streams. Many different presentations of a media content can be delivered from a DAG storage file. Data space is reduced because different presentations can avail of the same sub-trees in the DAG. In one implementation, exemplary DAG storage files for scalable media have an information structure that allows the DAG file to self-tailor and/or allocate the scalabilities of the media content presentations it is capable of delivering in order to suit the characteristics of a requesting entity.
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