数据采集与处理2017，Vol.32Issue(1)：71-77,7.DOI:10.16337/j.1004-9037.2017.01.008
H.264运动估计UMHexagonS算法的优化与改进
Optimization and Improvement of Motion Estimation UMHexagonS Algorithm in H.264
摘要
Abstract
Aiming at the existing problem of UMHexagonS algorithm in H.264,an improved fast motion estimation algorithm is proposed.The algorithm enhances the coding efficiency by optimizing the detection sequence of initial prediction motion vector(MV) according to the possibility of initial prediction MV becoming the best point,then an improved 5 × 5 spiral global search pattern is designed to reduce the search points of pattern,and an early termination technique for sub-macro block is proposed for further reducing the computation of motion estimation.The experimental results show that,with only negligible change of encoding performance,the improved algorithm can effectively reduce the motion estimation time and enhance the coding efficiency,and it can suit for video sequence of different motion intensities.关键词
运动估计/5×5螺旋全搜索/起始预测/提前终止策略Key words
motion estimation/5× 5 spiral global search/initial prediction/early termination technique分类
信息技术与安全科学引用本文复制引用
任克强,林芳明..H.264运动估计UMHexagonS算法的优化与改进[J].数据采集与处理,2017,32(1):71-77,7.基金项目
江西省教育厅青年科学基金(GJJ11132)资助项目 （GJJ11132）
江西省研究生创新基金(YC2013-S199)资助项目. （YC2013-S199）
