Prediction Matching for Video Coding

摘要

Modern video coding schemes such as H.264/AVC employ multi-hypothesis motion compensation for an improved coding efficiency. However, an additional cost has to be paid for the improved prediction performance in these schemes. Based on the observed high correlation among the multiple hypothesis in H.264/AVC, in this paper,we propose a new method (Prediction Matching) to jointly combine explicit and implicit prediction approaches.The first motion hypothesis on a predicted block is explicitly coded, while the eventual additional hypotheses are implicitly derived at the decoder based on the first one and the available data from previously decoded frames.Thus, the overhead to indicate motion information is reduced, while prediction accuracy may be better with respect to fully implicit multi-hypothesis prediction. Proof-of-concept simulation results show that up to 7.06% bitrate saving with respect to state-of-the-art H.264/AVC can be achieved using our Prediction Matching.