基于H.264/AVC的自适应帧级位分配优化算法  

Adaptive frame level bit allocation optimal algorithm for H.264/AVC

作　　者：龙昭华[1] 郑幸福[1] 程宏[1] 蒋贵全[1] 

机构地区：[1]重庆邮电大学计算机学院,重庆400065

出　　处：《计算机应用研究》2010年第1期386-388,共3页Application Research of Computers

基　　金：国家质检总局公益性行业科研专项经费项目(10-226);重庆市科技攻关基金资助项目(CSTC;2007AC2053)

摘　　要：为了获得精确的帧级目标位分配和提高编码质量,在JVT-G012码率控制算法的基础上,提出一种自适应的帧级位分配优化算法。该算法充分考虑帧之间纹理复杂度,弥补了JVT-G012算法中对帧目标位平均分配算法的不足。大量实验结果表明,改进后的算法在高运动或场景切换情况下,能明显提高视频编码质量,实现目标位的优化分配和输出码率的精确控制。In order to obtain accurate frame-level target bit allocation and improve encoding quality, this paper presented an adaptive frame-level optimal scheme of bit allocation. This algorithm made full use of texture complexity between frames compensating the inadequacy of average bit allocation scheme in JVT-G012 rate control algorithm. Extensive experimental results show that the proposed algorithm under the circmstances of high-movement or scene change, can significantly enhance the quality of video encoding and achieve the goal of optimizing bit allocation.

关 键 词：码率控制 位分配 率失真优化 平均绝对误差 

分 类 号：TP37[自动化与计算机技术—计算机系统结构]