Fast CU algorithm and complexity control for HEVC

J. Fang, Chien-Hao Kuo, Chang-Rui Lai, P. Chang
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Abstract

The latest video compression standard HEVC provides the coding unit (CU), defined by quad-tree structures, to achieve high coding efficiency. Compared with previous standards, HEVC encoder increases much computational complexity to levels inappropriate for applications of power-constrained devices. This work thus proposes a fast CU algorithm to improve coding efficiency, and distributes the complexity to the CU layer. Experimental results show that the loss of average BD-PSNR is about 0.1 dB with BD-bitrate 2 % increment as the complexity was reduced to 60%.
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HEVC的快速CU算法及复杂度控制
最新的视频压缩标准HEVC提供了由四叉树结构定义的编码单元(CU),以实现较高的编码效率。与以前的标准相比,HEVC编码器的计算复杂度大大增加,不适合功率受限设备的应用。因此,本文提出了一种快速的CU算法来提高编码效率,并将复杂度分配到CU层。实验结果表明,当复杂度降低到60%时,当bd比特率增加2%时,平均BD-PSNR的损失约为0.1 dB。
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