Fast Three Step Sub-pixels Search Algorithm for AVS Video Coding
Zhou Jing-ye · Jisuanji gongcheng · 2008
AVS is a domestic audio and video coding standard of China.In its video coding,sub-pixels search method is applied to achieve more accurate motion description and higher compression efficiency,with higher complexity.In order to reduce the complexity,a fast three step sub-pixels search algorithm is presented based on monotonous increase of the distortion of a search point with increasing distance from that search point to the Global Minimum Point(GMP),and the center-biased of motion vector.Simulation results show that the new algorithm can reduce computational complexity by more than 65% with little quality degradation.