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.
出处
《通信学报》
EI
CSCD
北大核心
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~~
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
H.264
rate distortion optimization
cost estimation
bit rate estimation
adaptive variable-length coding
