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一种面向H.264/AVC的运动估计算法

DOI: 10.11834/jig.20080604

Keywords: 视频编码,H.264/AVC,运动估计,运动矢量,模式选择,率失真优化

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Abstract:

提出了一种使用具有方向偏向性搜索模板和基于预测模式自适应选择运动估计方案的EPZS(enhancedpredictivezonalsearch)改进算法。该算法将运动估计过程与H.264/AVC中多参考帧、多预测模式等编码工具紧密结合,充分利用视频中运动具有高度时空相关性的特点,综合考虑速度、图像质量及压缩效率等方面的性能。实验结果表明,该算法以极小的计算量得到了与全搜索方法接近的效果;与EPZS算法相比,运动估计的处理速度有了较大幅度的提高,同时保持了与之相当、有时甚至更优的率失真性能。此外,该算法具有很好的鲁棒性,并且能够产生平滑的运动矢量场。

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