H.264中率失真代价估计模型研究  

Research on rate-distortion cost estimation model for H.264

作　　者：郑新资[1] 孙知信[1,2] 

机构地区：[1]南京大学计算机软件新技术国家重点实验室,江苏南京210093 [2]南京邮电大学宽带无线通信与传感网技术教育部重点实验室,江苏南京210003

出　　处：《通信学报》2012年第6期143-149,共7页Journal on Communications

基　　金：国家自然科学基金资助项目(60973140;61170276);江苏省自然科学基金资助项目(BK2009425);江苏省青蓝工程基金资助项目;江苏省六大人才高峰基金资助项目~~

摘　　要：提出了一种新的率失真代价估计模型。首先为提供更加精确的帧内/帧间宏块的编码比特数的估算,提出了一种新的码率估计模型,该码值为一序列编码参数的线性组合,这些参数跟熵编码和变换系数相关,从而得出新的性能更加优越的率失真代价估计模型。最后在率失真代价估计模型的效果分析、性能分析等多个方面进行详细的分析测试。实验结果表明,该模型在保证PSNR和码长变化不大的情况下大大地加快了编码速度。A new rate distortion cost estimation model was proposed.To provide more accurate estimation of the number of coding bits for encoding intra / inter macro blocks,firstly a new bit rate estimation model was proposed.The rate estimation was a linear combination of existing coding parameters,which were more accurately related to entropy coding and transform coefficients.Secondly a new rate distortion cost estimation model which had superior performance was given.Finally,a detailed analysis on the rate distortion cost estimation model from many aspects such as the effect and the performance was taken.Experimental results show that the encoding speed is greatly accelerated in ensuring little change both in PSNR and coding bits.

关 键 词：H.264 率失真优化 代价估计 码率估计 自适应可变长编码 

分 类 号：TP339[自动化与计算机技术—计算机系统结构]