Patent ID: 8681871
Filing Date: 2014-03-25
Classification: H04N

Abstract:
1. A system for receiving and decoding, to macroblocks of frames, a signal comprising a single packet aggregate of a high resolution packet and a low resolution packet, said signal produced by unbalanced multiple description coding of video signals using different intra refresh periods, an intra refresh period for said low resolution packet being shorter than the intra refresh period for said high resolution packet, said system comprising: a de-packetizer module configured for extracting said high resolution packet and said low resolution packet from said single packet, said de-packetizer module sending said extracted high resolution packet and said low resolution packet to a respective first decoder and a second decoder, said first decoder and said second decoder supplying respectively a high resolution and a low resolution frame to a postprocessor, said postprocessor configured for performing an error concealment operation, wherein the single packet aggregate is configured by aggregating the low resolution packet belonging to a first frame with index n and the high resolution packet belonging to a second frame with index k, said index k being equal to index n minus an offset value, and wherein the offset value is larger than one.