基于区域的高效视频编码帧内速率控制方案

Mingliang Zhou, Hai-Miao Hu, Yongfei Zhang
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引用次数: 9

摘要

在高效视频编码(High Efficiency Video Coding, HEVC)中,基础帧的编码效率低于帧间的编码效率,在低比特率应用中会造成帧间的闪烁伪影和感知波动。因此,本文提出了一种基于区域的帧内速率控制方案,以提高目标质量,降低帧间的PSNR波动。首先,根据帧内cpu的特征和复杂度将其划分为三个区域。提出了一种基于区域的比特分配方法,在不同区域之间预先确定比特。其次,提出了一种速率-复杂度-质量模型,用于调整qp以获得平滑的感知质量。实验结果表明,与HM12.0所采用的编码方案相比,该方案具有更高的编码性能和一致的视觉质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Region-based intra-frame rate-control scheme for High Efficiency Video Coding
In High Efficiency Video Coding (HEVC), the coding efficiency of infra-frames is lower than inter-frames, which will cause the flicker artifact and perceptual fluctuation among CTUs in low bitrates applications. Therefore, this paper proposes a region-based intra-frame rate-control scheme to improve the objective quality and to reduce PSNR fluctuation among CTUs. Firstly, the CTUs in intra-frame are classified into three regions according to their characteristics and complexity. And a region-based bit allocation is proposed to pre-determine bit among different regions. Secondly, a rate-complexity-quality model is proposed for infra-frame to adjust the QPs to achieve a smooth perceptual quality. The experimental results demonstrate that the proposed scheme can achieve higher coding performance and consistent visual quality when compared with the scheme adopted by HM12.0.
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