摘要
该文提出了一种基于H.264的快速运动估计算法。首先,基于当前宏块的纹理特征和局部运动性选择一组有效的预测块模式;其次,基于运动矢量的时空相关性建立一个预测运动矢量集合;最后,采用六边形模板和正方形模板进行运动搜索。另外,在匹配搜索过程中采用提前终止技术,进一步减少计算量。实验结果和分析表明,该算法能够显著提高运动估计的搜索速度,而图像质量和比特率只有少量变化。
This paper proposes a new fast inter mode decision and motion estimation algorithm suitable for H.264 encoding system.A method is applied to eliminate some redundant coding modes which contribute very little coding gain based on the texture analysis and local motion activity.It applies a hexagon-based zonal search,thresholding criteria and improved predictors selection based on the size of the block under processlng.The experiment results show that the proposed algorithm can dramatically reduce amount of computation and highly speed coding efficiency while keeping similar visual quality and bitrates.
出处
《计算机工程与应用》
CSCD
北大核心
2006年第6期30-32,共3页
Computer Engineering and Applications
基金
国家973基础研究规划资助项目(编号:2004CB318206)
