Optimal mode switching for multi-hypothesis motion compensated prediction
Transmission of compressed video over unreliable networks is vulnerable to errors and error propagation. Multi-hypothesis motion compensated prediction (MHMCP) which was originally developed to improve compression efficiency has been shown to have a good error resilience property. In this paper we improve the overall performance of MHMCP in packet loss scenarios by performing optimal mode switching within a rate distortion framework. The approach builds on the recursive optimal per-pixel estimate (ROPE), which is extended by re-deriving recursion formulas for the more complex MHMCP setting, so as to achieve an accurate estimation of the end-to-end distortion. Simulation results show significant performance gains over the standard MHMCP scheme and the importance of performing effective mode decisions. We also show results with comparison to conventional ROPE.