Title :
Region-based intra-frame rate-control scheme for High Efficiency Video Coding
Author :
Mingliang Zhou ; Hai-Miao Hu ; Yongfei Zhang
Author_Institution :
Beijing Key Lab. of Digital Media, Beihang Univ., Beijing, China
Abstract :
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.
Keywords :
image classification; video coding; CTU; HEVC; HM12.0; PSNR fluctuation reduction; coding performance; flicker artifact; high-efficiency video coding; intraframe classification; low-bitrate application; objective quality; perceptual fluctuation; perceptual quality; rate-complexity-quality model; region-based bit allocation; region-based intraframe rate-control scheme; Abstracts; Bit rate; Containers; Decision support systems; Fluctuations; Indexes; PSNR; Bit-allocation; PSNR fluctuation; QP adjustment; Region-based;
Conference_Titel :
Asia-Pacific Signal and Information Processing Association, 2014 Annual Summit and Conference (APSIPA)
Conference_Location :
Siem Reap
DOI :
10.1109/APSIPA.2014.7041648
