IMPROVEMENT ON FRAME LAYER RATE CONTROL SCHEME FOR H.264/AVC
This paper evaluated the linear interpolation, bit allocation on average and some other techniques used in H.264/AVC rate control algorithm. Then we proposed an improved algorithm to tackle the problems as the imprecise initial quantizationparameter (QP) calculation, the inaccurate bit allocation and so on. The proposed algorithm had the following features: a. The resign of the quantization algorithm in H.264/AVC resulted in an exponential predicted model; b. The QP of B frames were no longer using linear interpolation but using the self-adapting adjustment by the correction parameter B φ ; c. Considered the complexities of I frames and allocated bit to them in the encoding process; d. The target bit allocation for each P frame was proportional to its complexity in the group of picture (GOP). Experimental results and analysis showed that the improved rate control algorithm had increased the average peak signal-tonoise ratio (PSNR) up to 0.41dB on average and improved the quality of the reconstructed video obviously.
bit allocation rate control complezity prediction ezponential model
Fanqing Gao Guangjun Wen Zhengyong Feng Zixuan Zou
Communication and Information Engineering Institute, University of Elctronic Science and Tecnolgy of Huawei Technologies Co.,Shenzhen
国际会议
北京
英文
666-669
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）