一种新的基于凸集投影的空间域错误隐藏算法  

New Spatial Error Concealment Method Based on Projection onto Convex Sets

作　　者：宋峰[1] 马宇峰[1] 吕承民[1] 孙俊[1] 

机构地区：[1]西安通信学院,陕西西安710106

出　　处：《现代电子技术》2009年第7期154-156,共3页Modern Electronics Technique

摘　　要：针对视频传输过程中,出现误码引起的视频质量严重下降的问题,提出一种改进的视频错误隐藏中的凸集投影算法。该方法主要包括:对丢失块周围的完好块进行能量检测来确定丢失块的类型;根据所确定的丢失块的类型建立闭凸集;迭代求解。实验结果表明,与经典的凸集投影算法相比在信噪比相差不大的情况下大大减少了计算量。Once error appeared in video communication, the quality of transmission can desend sharply. A new error concealment methed based on Projection onto Convex Sets（POCS） is propsed. Three steps are included in this method. Firstly the energy of the right received blocks around the missing block is detected and the type of the missing block is judged. Secendly, the convex sets are established based on the types of the missing block. At last,iteratie and get rusults. The results prove that comparing to typical POCS,the calculation is reduced in almost same PSNR.

关 键 词：错误隐藏 凸集投影 能量检测 边缘 

分 类 号：TN919.33[电子电信—通信与信息系统]