H.264/AVC编码器的快速运动估计优化

2010 IEEE International Conference on Wireless Communications, Networking and Information Security Pub Date : 2010-06-25 DOI:10.1109/WCINS.2010.5541901

Chen Zu-jue, Cao Jie, Liu Shao-qing

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引用次数: 1

摘要

与以前的视频标准相比，H.264/AVC由于采用了可变块大小运动估计等新工具，计算复杂度非常高。提出了一种基于H.264的快速运动估计方案。首先，根据计算得到的RDO值特征和块间的关系预测当前块的运动范围;然后在此基础上，在接下来的搜索步骤中应用变量搜索掩码。该方案由改进的初始搜索点、搜索模式、搜索范围和匹配准则组成。实验结果表明，该方法与最新JM(Joint Model reference)软件中现有的快速算法相比，编码时间可节省30%左右，而PSNR与全搜索算法基本相同。

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A fast motion estimation optimization for H.264/AVC encoder

Compared with previous video standards, the computational complexity of H.264/AVC is extraordinarily high due to newly adopted tools such as variable block size motion estimation. A fast motion estimation scheme based on H.264 is proposed in this paper. Firstly it predicts the motion range of the current block based on the computed RDO value character and the relation between the collocated blocks. Then based on this, variable search masks are applied in the following search steps. This scheme consists of the improved initial search point, search pattern, search range and match criterion. The experiment result shows that the method can save about 30% encode time compared to the current fast algorithms in the latest JM(Joint Model reference) software, while achieve almost the same PSNR as the full search algorithm.

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来源期刊

2010 IEEE International Conference on Wireless Communications, Networking and Information Security

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