计算机工程Issue(10)：275-278,4.DOI:10.3969/j.issn.1000-3428.2013.10.059
一种改进的H.264基本单元码率控制算法
An Improved H.264 Basic Unit Rate Control Algorithm
摘要
Abstract
In view of the limitation caused by considering time correlation only in Mean Absolute Difference(MAD) prediction and MAD factor only in bit allocation of basic unit in Rate Control(RC) algorithm for H.264, this paper proposes an improved algorithm in which the predicted MAD is calculated by a combination of linear prediction model and the space-time weighted prediction model, and corrected according to the prediction error of the previous basic unit. Besides, the basic unit complexity is estimated by a combined Peak Signal Noise Ratio(PSNR)-based and MAD-based method, based on which bit allocation is done. Simulation results show that compared with JM8.6, the proposed algorithm not only can make the output bit rate more accurate, but also can improve the average PSNR by 0.1 dB.关键词
H.264标准/码率控制/基本单元/平均绝对差值/峰值信噪比/基本单元复杂度Key words
H.264 standard/Rate Control(RC)/basic unit/Mean Absolute Difference(MAD)/Peak Signal Noise Ratio(PSNR)/basic-unit complexity分类
信息技术与安全科学引用本文复制引用
丁久涛,李明齐,宋荣方..一种改进的H.264基本单元码率控制算法[J].计算机工程,2013,(10):275-278,4.基金项目
国家“863”计划基金资助项目(2011AA01A105)；上海市科委基金资助项目(10DZ1500700,11DZ1500500) （2011AA01A105）
