DVC边信息估计中块匹配准则算法的研究  

Research on Block Matching Criterion Algorithm in Generation of Side Information for Distributed Video Coding

作　　者：杨张[1] 智海素[2] 雷海军[3] 

机构地区：[1]深圳职业技术学院,广东深圳518055 [2]石家庄职业技术学院电气与电子工程系,河北石家庄050081 [3]深圳大学计算机与软件学院,广东深圳518060

出　　处：《电视技术》2012年第13期35-38,共4页Video Engineering

基　　金：国家自然科学基金项目(60972037);省部产学研项目(2009B090300267)

摘　　要：对在采用插值法生成边信息的过程中通常用到的块匹配算法进行了分析,指出了常用算法存在的问题即对于运动比较剧烈的视频序列或采用的搜索步长比较大的情况下,通常的匹配准则方法估计出来的运动矢量与实际的运动矢量之间存在较大的偏差,因此为了提高运动矢量的精度,采用一个平滑系数将运动矢量的代价值应用到加权SAD中作为新的块匹配的估计准则,实验结果表明,该方法能有效去除图像的方块效应并能提高边信息的质量。The block matching algorithm which is usually adapted in using side information estimation by using interpolation method, is analyzed in detail, and its existing problems are also pointed out. The problems are that when high motion occurs or longer step lengths are selected ,the popular MAD criteria is used to minimize the individual block distortion results in a quite noisy motion vector field. So in order to improve the precision of the motion vector, a new matching estimation algorithm is proposed in this paper which considering the cost of the motion vector by a smooth coefficient, and the experiment results show that this method can remove the image square effect effectively and can improve the quality of the side information.

关 键 词：分布式视频编码 边信息 代价值 块匹配 

分 类 号：TN919.81[电子电信—通信与信息系统] TP391[电子电信—信息与通信工程]