一种H.264视频编码码率控制方法  

A method for controlling the bit rate of H.264 video coding

作　　者：李浩[1] 张颖[1] 张兆扬[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《电视技术》2003年第12期10-12,20,共4页Video Engineering

基　　金：上海市重点学科建设基金资助项目(编号2001-44)

摘　　要：根据视频编码线性率失真函数和对H.264整数变换量化方法分析,提出一种适合于H.264编码算法的码率控制算法。先验证线性率失真函数对H.264编码算法的适用性,再通过将H.264整数变换的量化分解为系数校正和统一量化两个步骤实现了线性率失真函数在H.264码率控制中的应用。实验证明,与JVT-G012码率控制算法相比,码率控制的准确性和信噪比均有所提高。Based on a linear video R-D model and the analysis of the quantization procedure of low complexity transform coefficients used in H.264, a rate control strategy for H.264 video coding is proposed in this paper. The R-D model is verified using H.264 video coding algorithm at first. Then the quantization procedure of H.264 video coding is analyzed and devided into two steps transform coefficients adjustment and uniform quantization. Finally, a rate control strategy for H.264 video coding is proposed. Experiments show that the accuracy and the SNR of the coded video is improved by this method compared to previous methods.

关 键 词：H.264 视频编码 码率控制 线性率失真函数 整数变换 

分 类 号：TN919.81[电子电信—通信与信息系统]