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Video encoding in a video conference

  • US 8,520,053 B2
  • Filed: 07/27/2012
  • Issued: 08/27/2013
  • Est. Priority Date: 04/28/2005
  • Status: Active Grant
First Claim
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1. A method of distributing video content in a video conference between at least two participant devices, the method comprising:

  • at a first participant device, detecting a condition that requires the first participant device to retransmit image data as intra-block encoded data to a second participant device;

    intra-block encoding a first portion of a first image at the first participant device;

    transmitting the intra-block encoded portion of the first image to the second participant device without any information for a second portion of the first image;

    inter-block encoding a first portion of a second image that corresponds to the first portion of the first image and intra-block encoding a second portion of the second image that corresponds to the second portion of the first image at the first participant device; and

    transmitting the inter-block encoded first portion of the second image and the intra-block encoded second portion of the second image to the second participant device,wherein the intra-block encoded first portion of the first image and the intra-block encoded second portion of the second image at least partially refresh the image data from the first participant device for the second participant device.

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