Patent ID: 8345766
Filing Date: 2013-01-01
Classification: H04N

Abstract:
1. A method of communicating audio-video information to a receiver, the method comprising: determining bandwidth requirements for each of multiple alternate input streams, the multiple alternate input streams comprising at least one group of pictures (GOP), the GOP comprising I pictures, P pictures and B pictures; sub-sampling the multiple alternate input streams by filtering the B pictures before the P pictures, and the P pictures before the I pictures, to form multiple sub-sampled alternate input streams, the sub-sampling comprising filtering at least one picture from each GOP to form a plurality of sub-sampled alternate input streams, each of the plurality of sub-sampled alternate input streams having a different amount of pictures filtered from each GOP, wherein one picture is filtered from each GOP to form a first sub-sampled input stream, two pictures are filtered from each GOP to form a second sub-sampled input stream, three pictures are filtered from each GOP to form a third sub-sampled input stream, and four pictures are filtered from each GOP to form a fourth sub-sampled input stream; measuring bandwidth requirements of the sub-sampled alternate input streams; selecting for audio-video transmission one of the sub-sampled alternate input streams if it has a highest determined bandwidth requirement less than or equal to the measured bandwidth currently available for transmission, and transmitting the selected sub-sampled alternate input stream to the receiver.