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A novel adaptive quantization method for video coding

机译:一种新的视频编码自适应量化方法

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摘要

In this paper, we propose a novel AQ (Adaptive Quantization) algorithm to improve the subjective coding performance. Firstly, the factors affecting a suitable adaptive quantization method are carefully analyzed. Two important conclusions are drawn to guide designing a suitable AQ method. Secondly, based on the drawn analysis, a novel SATD (Sum of the Transformed Difference) based temporal adaptive quantization method is proposed. The proposed method fully considers the temporal characteristics, which can produce more visual-friendly QP (quantization parameter) offset distribution. Experiments are performed on x264 and HM16.0, respectively. With SSIM (Structure Similarity) as the metric, more than 21.07% BD-Rate (Bjontegaard-Delta Rate) saving can be achieved on x264, and on HM16.0, 8.07% and 7.99% BD-Rate savings can be obtained for LDP (Low-Delay-main-P) and LDB (Low-Delay-main-B) configurations, respectively, which is better than the state-of-the-art methods.
机译:在本文中,我们提出了一种新颖的AQ(自适应量化)算法来提高主观编码性能。首先,仔细分析影响合适的自适应量化方法的因素。得出两个重要结论,以指导设计合适的AQ方法。其次,在分析的基础上,提出了一种新的基于SATD(时间差求和)的时间自适应量化方法。所提出的方法充分考虑了时间特性,可以产生更直观的QP(量化参数)偏移量分布。实验分别在x264和HM16.0上进行。使用SSIM(结构相似性)作为度量标准,可以在x264上节省超过21.07%的BD-Rate(Bjontegaard-Delta Rate),而在HM16.0上,可以为LDP节省8.07%和7.99%的BD-Rate。 (低延迟主P)和LDB(低延迟主B)配置,这比最新的方法要好。

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