基于区域的高效视频编码帧内速率控制方案

Signal and Information Processing Association Annual Summit and Conference (APSIPA), 2014 Asia-Pacific Pub Date : 2014-12-01 DOI:10.1109/APSIPA.2014.7041648

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。

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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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Signal and Information Processing Association Annual Summit and Conference (APSIPA), 2014 Asia-Pacific

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