基于可变块运动矢量的边信息生成算法  

Side Information Generation Algorithm Based on Variable Block Motion Vector

作　　者：程德强[1] 姜海龙[1] 郑珍[1] 郭政[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《电视技术》2015年第19期1-5,9,共6页Video Engineering

基　　金：国家自然科学基金项目(51204175)

摘　　要：在分布式视频编码系统中，针对图像中细节丰富的区域易造成严重的块效应，提出了一种基于可变块运动矢量的边信息生成算法。根据前后相邻关键帧对应块的相关性，将像素块分为保留块和运动块。对保留块直接作保留处理，对运动块中的像素块继续进行分割并计算子块的初始运动矢量。再将全部块的运动矢量通过加权自适应运动补偿得到边信息。实验结果表明，对于运动较剧烈复杂的视频序列，该算法能够提高边信息生成质量，并且使得改进后的边信息PSNR值提高了0．98～1．33dB。Aiming at the problem that areas which have rich details can result in serious blocking effects in a distributed video coding system,a side information generation algorithm based on variable block motion vector is proposed. The pixel blocks are divided into preservation blocks and motion blocks according to the correlation between the blocks in adjacent key frames. The preservation blocks are directly retained, and the pixel blocks existed in the motion blocks are continued to divide and its initial motion vectors of the sub-blocks are calculated. At last, in order to get improved side information, it uses the method of weighted adaptive motion compensation to process all the motion vectors of corresponding blocks. The experimental results show that, for the video sequence is severely complex, this algorithm can improve the quality of the side information generation and the PSNR of the improved method proposed in this paper can increase by 0. 98 - 1.33 dB.

关 键 词：视频编码 运动估计 块分类 边信息 

分 类 号：TN919.8[电子电信—通信与信息系统]