Patent ID: 8520053
Filing Date: 2013-08-27
Classification: H04N

Abstract:
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.