H.265/HEVC中增强图像间预测的非整数位估计

2016 IEEE 17th International Symposium on A World of Wireless, Mobile and Multimedia Networks (WoWMoM) Pub Date : 2016-06-01 DOI:10.1109/WoWMoM.2016.7523586

S. Im, M. Ghandi, Ka‐Hou Chan

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引用次数: 2

摘要

许多现代视频编码器在压缩过程中使用拉格朗日率失真优化(RDO)算法来决定模式。本文提出在H.265中，通过计算非整数位对语法元素进行算术编码来提高图像间预测的准确性。在RDO过程中，必须估计每种模式的失真和比特率，越准确的估计会导致更好的优化决策。我们的方法在RDO性能方面提供了显著的增益，模拟表明H.265/HEVC编解码器可以实现高达16.0%的平均比特率节省。

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Non-integer bit estimation for enhanced inter-picture prediction in H.265/HEVC

Many modern video encoders use the Lagrangian rate-distortion optimization (RDO) algorithm for mode decisions during the compression procedure. This paper proposes to increase the accuracy of inter picture prediction in H.265, by computing a non-integer number of bits for arithmetic coding of the syntax elements. During the RDO process the distortion and bit rate of each mode has to be estimated and a more accurate estimation leads to better-optimized decisions. Our method offers a significant gain in RDO performance, with simulations showing that an average bit-rate saving of up to 16.0% can be achieved for the H.265/HEVC codec.

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2016 IEEE 17th International Symposium on A World of Wireless, Mobile and Multimedia Networks (WoWMoM)

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