数据采集与处理2017，Vol.32Issue(2)：278-285,8.DOI:10.16337/j.1004-9037.2017.02.007
一种利用预测运动矢量改进的H.264快速运动估计算法
Improved Method of H.264 Fast Motion Estimation Using Predictive Motion Vector
摘要
Abstract
An improved algorithm is proposed based on unsymmetrical cross multi-hexagon grid search (UMHexagonS),which is a fast motion estimation algorithm recommended by H.264.In the prediction link for initial search points,predictive vector sets are established,and the follow-up search strategy is determined according to the length of prediction vector sets.In the global search link,the correlation between prediction motion vectors is used to skip some search steps,and some templates are replaced.In addition,the block of zero coefficients is detected to terminate the motion estimation process in advance,according to characteristics of integer transform and quantization.Experimental results show that,when the quantization step size is 28,the proposed algorithm reduces the motion estimation time by 34.80 ％ compared with the UMHexagonS algorithm,while maintaining the performance.Finally,the algorithm can adapt to video sequences with different motion intensity under different quantization steps,which is a fast motion estimation algorithm with fast speed and good performance suiting for H.264.关键词
视频编码/运动估计/预测运动矢量/H.264/非对称十字型多层次六边形格点搜索Key words
video coding/motion estimation/predicted motion vector (PMV)/H.264/unsymmetrical cross multi-hexagon grid search分类
信息技术与安全科学引用本文复制引用
郭继昌,邱琳耀,张雪..一种利用预测运动矢量改进的H.264快速运动估计算法[J].数据采集与处理,2017,32(2):278-285,8.基金项目
高等学校博士学科点专项科研基金(20120032110034)资助项目. （20120032110034）
