Efficient error recovery for multiple description video coding
Multiple description coding (MDC) and multihypothesis motion-compensated prediction (MHMCP) are two promising error resilient video coding techniques. We propose an enhanced error resilient video coding scheme based on multiple state video coding (MSVC). It uses multihypothesis motion prediction in addition to normal motion-compensated video compression steps. Yielded additional motion vectors between frames of two descriptions can help efficiently and quickly estimate lost content in one description when the other one is received correctly. Negligible redundancy is added to originally coded MSVC bitstreams while complicated motion search is avoided at decoder when there is a need to estimate lost content. Simulation results show that the proposed scheme has better error recovery performance than previously used approaches in most situations, especially when multiple and complex motions appear.