Study and Implementation on an Unsymmetrical Double Cross-search Algorithm for Block-matching Motion Estimation
Zhiyong Gao · Jisuanji gongcheng · 2006
Center-biased characteristics of motion vector probabilities distribution is very important for motion estimation,but directional feature of motion vector probabilities distribution is ignored.An unsymmetrical cross-search algorithm(UDCS) is proposed.Search steps of using small cross-search pattern to find small motion vectors in initial phase and unsymmetrical double cross-search pattern to further determine search large motion vectors in subsequent steps are brought forward.Finally,architecture of the algorithm for implementation is introduced and performance is analyzed.