高性能视频编码帧间预测的单元划分优化算法

单娜娜; 周巍; 段哲民; 魏恒璐

doi:10.11999/JEIT150843

高性能视频编码帧间预测的单元划分优化算法

doi: 10.11999/JEIT150843

基金项目:

国家自然科学基金(60902101)，教育部新世纪优秀人才计划(NCET-11-0824)，中央高校基本科研业务费专项资金(3102014JCQ01057)

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出版历程
- 收稿日期: 2015-07-13
- 修回日期: 2015-12-11
- 刊出日期: 2016-05-19

An Effective CU Splitting Algorithm in Inter Prediction of HEVC

Funds:

The National Natural Science Foundation of China (60902101), New Century Excellent Talents in University (NCET-11-0824), The Fundamental Research Funds for the Central Universities (3102014JCQ01057)

摘要

摘要: 新一代的高性能视频编码(HEVC)通过应用各种先进技术来大幅提高视频编码的性能，然而，这些方法也大大增加了整个编码过程，尤其是预测编码阶段的计算复杂度。该文提出一种应用于高性能视频编码帧间预测的快速单元划分算法。该算法基于HEVC灵活的四叉树结构，根据被编码单元的运动特性来确定所编码信息的阈值，并以此作为单元划分的提前终止条件，从而减少了不必要的单元划分操作和率失真代价的相关计算，达到节省编码时间和降低编码复杂度的目的。实验结果表明，在峰值信噪比(PSNR)损失仅为0.0418 dB的情况下，所提算法可以平均降低46.1%的编码时间。
- 高性能视频编码 /
- 编码单元 /
- 帧间预测 /
- 率失真代价
Abstract: High Efficiency Video Coding (HEVC) provides better compression performance by adopting many new techniques. However these tools also increase the computational complexity of the prediction, which consumes most of encoder computations. This paper proposes an effective splitting algorithm in inter prediction of HEVC. Based on the motion homogeneity of coding unit, a certain threshold is used to decide whether the coding unit should be split into smaller ones. So the unnecessary calculation decreases rapidly. By skipping some specific sub-CUs, the coding complexity is dramatically improved. Experimental results show that the proposed technique can save 46.1% coding time in average with negligible loss of coding efficiency, and the decrease of PSNR is only 0.0418 dB.
- High Efficiency Video Coding (HEVC) /
- Coding Unit (CU) /
- Inter prediction /
- Rate distortion cost

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参考文献(26)

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