Media file format to support switching between multiple...

Electrical computers and digital processing systems: multicomput – Computer-to-computer protocol implementing – Computer-to-computer data streaming

Reexamination Certificate

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C709S236000, C709S246000, C707S793000, C725S086000, C725S087000, C725S088000, C725S090000, C725S093000, C725S094000, C715S720000, C386S349000, C726S032000

Reexamination Certificate

active

07472198

ABSTRACT:
Media content is streamed from a server computer to a client computer. A media file format is used to store data for multiple timeline-altered streams that provides support for switching between the different timeline-altered streams during their presentation. In one aspect, a user can switch between different timeline-altered streams. Upon receiving a user request to switch to a particular timeline-altered stream (the target stream), the client computer accesses a time code stream data object corresponding to the current data unit being presented. The time code stream data object identifies a primary stream presentation time corresponding to the data unit. The client then uses the primary stream presentation time to index into a table of mappings to byte offsets. The table provides a mapping of the primary stream presentation time to a corresponding byte offset of the target stream.

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