Motion vector certainty reduces bit rate in backward motion estimation video coding
Astrid Lundmark, Haibo Li, Robert Forchheimer · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2000
Wavelet video coding using motion vectors estimated simultaneously at the transmitter and receiver side from the transmitted image data have been reported to have good compression capabilities, comparable to the non-scalable version of H.263. When scalability is required, the comparison turns even more in favor of the wavelet coding scheme. This paper shows that it is possible to reduce the bit-rate further in backward motion estimation schemes by using the certainty of each estimated motion vector. In this paper we report a lowering in bit rate of about 20% by using the motion vector certainty as background information in the entropy coding/decoding process. We also propose a low- complexity algorithm which does not require motion estimation/compensation, but uses the motion vector certainty.