Title :
An Improved ROI-Based Rate Control Algorithm for H.264/AVC
Author :
Li, Hang ; Wang, Zhibing ; Cui, Huijuan ; Tang, Kun
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing
Abstract :
An improved ROI-based rate control algorithm for H.264/AVC is proposed in this paper, which exploits the features of human visual system (HVS), with video content taken into account, to enhance perceptual quality as well as to reach the target bit rate simultaneously. A novel motion-based rate prediction model is employed which is more accurate and straightforward than the one in H.264/JM80. The bit allocation scheme is rate-distortion optimized by applying the Lagrange multiplier method. Extensive simulations show that proposed algorithm achieved better perceptually visual quality than H.264/JM80 dose while the PSNR is sustained
Keywords :
image motion analysis; video coding; H.264/AVC; Lagrange multiplier method; ROI; bit allocation scheme; human visual system; motion-based rate prediction model; rate control algorithm; Automatic voltage control; Bit rate; Control systems; Humans; Lagrangian functions; Optimization methods; PSNR; Predictive models; Rate-distortion; Visual system;
Conference_Titel :
Signal Processing, 2006 8th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-9736-3
Electronic_ISBN :
0-7803-9736-3
DOI :
10.1109/ICOSP.2006.345615
