压缩域H.264视频转换编码及其关键技术分析  

Video transcoding for H.264 in the compressed domain and key techniques analysis

作　　者：杨高波[1] 余圣发[2] 张兆杨[3] 

机构地区：[1]湖南大学计算机与通信学院,湖南长沙410082 [2]国防科学技术大学电子科学与工程学院,湖南长沙410073 [3]上海大学通信与信息工程学院,上海200072

出　　处：《通信学报》2006年第10期124-131,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(60572127);湖南省自然科学基金资助项目(05JJ30113)~~

摘　　要：在分析最新的视频编码标准H.264与以前的编码标准差异基础上,针对压缩域的H.264视频转码,系统地研究了其关键技术的进展,并按DCT到HT的系数变换、运动矢量快速重估计、修正和帧内/间编码模式和速率控制等4个方面进行了分类归纳,还对未来本领域值得研究的问题进行了展望和预测。Based on the analysis of the difference between the newest video coding standard H.264 and the earlier video-coding standard, the advances in the key technologies for H.264 video transcoding, which was directly conducted in the compressed domain, were systematically discussed. They were classified into four categories： DCT-to-HT coefficients conversion, fast motion re-estimation and refinement, inter/intra coding mode decision and rate control. Future directions on this topic were also prospected.

关 键 词：压缩域 视频转换编码 H.264 模式映射 运动矢量重估计 

分 类 号：TN911.21[电子电信—通信与信息系统]