一种基于H.264的有效运动估计算法

An Efficient Motion Estimation Algorithm for H.264 Video Coding Standard

运动估计算法是实时视频编解码技术的研究重点,高精度的匹配和补偿可以减少预测误差,提高视频图像的压缩效果.为降低在视频编码标准H.264中运动估计的高计算复杂度问题,提出了采用一种基于节点模型的可变形块匹配运动估计算法来搜索最佳运动矢量.该算法充分利用了H.264运动矢量的的统计特性和相关性,并采用基于像素差值分类的运动估计匹配准则.实验表明,在编码性能损失很小的条件下,该算法有效降低了视频压缩编码中运动估计的运算复杂度.

The efficient motion estimation algorithms are the important research hotspot in the real-time video coding-decoding technology. The prediction error can be decreased by incorporating high accuracy estimation and compensation, and the performance of compressed video can be improved. The high computational demands of the H. 264 video encoder are reduced by an deformable block-matching algorithm using the node-based model. This algorithm well exploits the motion vector statistic characteristic and correlation and uses motion estimation criterion based on the pixel difference classify. Experiments show that the efficient motion estimation algorithm proposed can further reduce block matching distortion computations relative to conventional fast motion estimation algorithms with neglectable coding efficiency loss.