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面向H.264的码率控制优化算法 被引量:4

An Optimized Rate Control Algorithm for H.264
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摘要 基于视频图像编码前的参数信息和I帧图像复杂度的特征量分析,建立了算法模型,提出了精确预测初始量化参数(IQPP)算法,该算法可准确预测初始量化参数.实验结果表明,在低比特率视频应用中,IQPP算法对于视频图像的码率控制精度和率失真优化效果较以往方法有明显提高,而且可以获得较高的平均峰值信噪比(PSNR)和稳定的重建图像质量. An initial quantity parameter (QP) prejudgment (IQPP) algorithm that can predict the initial QP precisely is proposed based on statistics of encoded frames and frame complexity eigenvalue of I frame. Experimental results show that IQPP algorithm will greatly enhance the performance of rate control and rate-distortion optimization (RDO). The average peak signal-to-noise ratio (PSNR) will be improved compared to traditional method and a constant picture quality has been achieved at low bit rates.
出处 《北京邮电大学学报》 EI CAS CSCD 北大核心 2008年第1期88-91,101,共5页 Journal of Beijing University of Posts and Telecommunications
基金 国家自然科学基金项目(60672114)
关键词 视频编码 码率控制 量化参数 率失真优化 video encoder rate control quantity parameter rate-distortion optimization
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共引文献22

同被引文献24

  • 1YIN Ming,WANG Hong-yuan.A rate control scheme for H.264 video under low bandwidth channel[J].Journal of Zhejiang University-Science A(Applied Physics & Engineering),2006,7(6):990-995. 被引量:11
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