Optimization on Motion Estimation Algorithm Based on H. 264
Motion estimation is a very important part of video compression. As a result of using precision of motion vector in H.264 encoder, the computational cost increases rapidly, and motion estimation is the most time-consuming stage. In this paper, based on the UMHexagonS algorithm, an optimized algorithm is proposed based on the dynamic search window selection, big hexagon and small hexagon search mode respectively, which saves motion estimation time effectively with a little quality loss. Experiments with some typical video sequences show that compared to the original UMHexagonS algorithm, this new algorithm can save about 17.851％ motion estimation time and reduce the complexity of original scheme as well as enhance the real time performance of encoder and almost has no changes in the reconstructed picture quality and bitrates.
H264 motion estimation UMHexagonS Algorithm dynamic search window
Xingyu Wen Xingyu Wen
Changchun Institute of Optics, Fine Mechanics andPhysics, Chinese Academy of SciencesCIOMPChangchun, Graduate School of the Chinese Academy of Sciences GSCAS Beijing, China
国际会议
成都
英文
1-4
2010-08-20（万方平台首次上网日期，不代表论文的发表时间）