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介绍了在MPEG编码中以量化步长q为参数来进行的传统的码率控制,即q域的码率控制算法然后提出了以传输矩阵中零的百分比ρ为参数进行率函数的分析最后基于ρ-q映射方法提出了ρ域分析的码率控制算法。
The traditional rate control with quantization step size q as the parameter in MPEG coding is introduced, that is, the rate control algorithm in q-domain is presented. Then the analysis of the rate function with the percentage ρ of zero in the transmission matrix is presented. Finally, The ρ-q mapping method puts forward a rate control algorithm for ρ domain analysis.