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Media File Format to Support Switching Between Multiple Timeline-Altered Media Streams

  • US 20080071920A1
  • Filed: 11/26/2007
  • Published: 03/20/2008
  • Est. Priority Date: 05/03/2000
  • Status: Active Grant
First Claim
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1. A computer-readable data storage medium with computer-program instructions embedded thereon, the computer-program instructions being executable by a processor for performing operations comprising:

  • receiving a user selection to switch from a first timeline-altered media stream to a second timeline-altered media stream;

    accessing a time-compressed stream object corresponding to a data unit, currently being rendered, of the first timeline-altered media stream;

    identifying, from the time-compressed stream object, a presentation time of a primary media stream whose timeline has not been altered, the presentation time indicates when the data unit of the first timeline-altered media stream is to be rendered, the presentation time being independent of a delivery time that indicates when the data unit is to be delivered to a rendering client;

    accessing an index table to identify an offset into the second timeline altered stream corresponding to the presentation time of the primary media stream; and

    wherein the second timeline-altered media stream is for presentation to a user by the rendering client.

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