A fixed-complexity HEVC inter mode filtering algorithm based on distribution of IME-FME cost ratio
A fixed-complexity HEVC inter mode filtering algorithm based on distribution of IME-FME cost ratio
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DOI：
10.1109/iscas.2015.7168709
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发表时间：
2015-05
期刊：
影响因子：
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通讯作者：
Jinjia Zhou;Yizhou Zou;Dajiang Zhou;S. Goto
中科院分区：
文献类型：
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作者：
Jinjia Zhou;Yizhou Zou;Dajiang Zhou;S. Goto
运动估计（ME）是H.265/HEVC编码的关键性能瓶颈。在实现ME时，通常需要固定或有界的复杂度以实现高效的流水线和并行性。提出了一种固定复杂度的模式滤波算法来降低分数阶ME（FME）的复杂度。首先，应用层过滤来选择模式候选者。其次，整数分数ME成本的比率（Rf/i）的定义和Rf/i的置信区间用于进一步的模式选择。最后，一个算法来固定的复杂性。实验结果表明，FME编码时间减少了83.3%，而BD率略有增加。
Motion Estimation (ME) is a key performance bottleneck of H.265/HEVC encoding. In implementing ME, a fixed or bounded complexity is often desired for efficient pipelining and parallelism. We present a fixed-complexity mode filtering algorithm to reduce the complexity of fractional ME (FME). Firstly, a layer filtering is applied to select the mode candidates. Secondly, the ratio of integer-fractional ME costs (Rf/i) is defined and the confidence interval of Rf/i is utilized for further mode selection. Finally, an algorithm to fix the complexity is applied. Experimental results show that the FME encoding time is reduced by 83.3% with slightly BD-rate increase.