On the analysis and design of motion sampling structure for advanced motion-compensated prediction
Yu-Chen Tseng, Chung-Hao Wu, Yi-Wen Chen, Tse-Wei Wang, Wen-Hsiao Peng · 2010
This paper addresses the problem of improving motion sampling efficiency for motion-compensated prediction (MCP). We provide a theoretical framework for analyzing the effect of motion sampling structure on MCP efficiency. It is shown that the sampling grid in-duced by the quadtree partition in H.264/AVC is suboptimal. To improve sampling efficiency, we propose a new pattern, which pro-vides sampling points at both the center and the top-left corner of a macroblcok. When contrasted with conventional NxN/2 block par-tition, the proposed scheme performs consistently and significantly better in subjective and objective quality. Index Terms — Motion Sampling, H.264/AVC, OBMC 1.