一种用于混合视频编解码器率失真优化的自适应拉格朗日乘子确定方法
An adaptive Lagrange multiplier determination method for rate-distortion optimisation in hybrid video codecs
摘要：
本文提出了一种用于视频压缩码率-质量优化的自适应拉格朗日乘子确定方法。受拉格朗日乘数选择测试的实验结果的启发，所提出的方法自适应地估计最佳拉格朗日乘数为不同的视频内容，基于最近编码的帧的失真统计。所提出的算法已完全集成到H.264和HEVC参考编解码器中，并用于编码B帧的率失真优化。结果显示，基于Bjontegaard delta测量的各种类型的测试内容，在复杂性增加最小的情况下，整体比特率节省有希望（在测试的序列上高达11%）。
英文摘要：
This paper describes an adaptive Lagrange multiplier determination method for rate-quality optimisation in video compression. Inspired by the experimental results of a Lagrange multiplier selection test, the presented approach adaptively estimates the optimum Lagrange multiplier for different video content, based on distortion statistics of recently encoded frames. The proposed algorithm has been fully integrated into both the H.264 and HEVC reference codecs, and is used in rate-distortion optimisation for encoding B frames. The results show promising (up to 11% on the sequences tested) overall bitrate savings, for a minimal increase in complexity, on various types of test content based on Bjontegaard delta measurements.
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