Title :
Improved rate control scheme in H.264 for real-time communication
Author :
Xiaojing, Chen ; Lun-hui, Deng
Author_Institution :
Eng. Center of Digital Audio & Video, Commun. Univ. of China, Beijing, China
Abstract :
In this paper, we present an improved rate control scheme for real-time communication of H.264/AVC standard. Compared with JVT-G012, our algorithm has two main improving points: (a) adoption of a weighted MAD prediction, considering both spatial and temporal correlation, meanwhile reduce the complexity; (b) employ a linear R-Q model instead of the quadratic model. The result based on JM86 shows that the proposed scheme performs better than JVT-G012 with lower complexity. The relative PSNR is improved 0.3-0.5dB in QCIF sequences, and the bitrate fluctuation varies more smoothly.
Keywords :
image sequences; video coding; H.264/AVC standard; JVT-G012; QCIF sequences; bitrate fluctuation; improved rate control scheme; linear R-Q model; quadratic model; relative PSNR; spatial correlation; temporal correlation; weighted MAD prediction; Bit rate; Complexity theory; Computational modeling; Encoding; PSNR; Predictive models; Streaming media; H.264/AVC; MAD prediction; linear R-Q model; rate control;
Conference_Titel :
Electric Information and Control Engineering (ICEICE), 2011 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-8036-4
DOI :
10.1109/ICEICE.2011.5777199
