基于相关性的分布式解码检测优化算法  

A CORRELATION-BASED DISTRIBUTED DECODING DETECTION OPTIMISATION ALGORITHM

作　　者：薛艳锋[1] 陈媛[2] 刘继华[1] 兰静[1] 乔丽[1] 

机构地区：[1]吕梁学院计算机科学与技术系山西吕梁033000 [2]江苏大学计算机科学与通信工程学院江苏镇江212013

出　　处：《计算机应用与软件》2013年第9期255-258,269,共5页Computer Applications and Software

基　　金：吕梁学院校内自然科学基金项目(ZRXN201216)

摘　　要：在分布式视频编解码系统中,由于细节变化丰富而生成的边信息与原始视频帧之间存在较大的差距,降低了解码帧质量。针对如何实现解码帧质量检测,并对低质量的解码帧进行优化以提高系统性能的问题,提出一种基于相关性的分布式解码检测优化算法。在编解码端分别计算相关性,得到置信度值并进行解码检测。对于低质量的像素块根据相关性及运动估计进行重构,最后通过滤波和双向运动补偿产生优化像素块。实验结果表明,所提算法对低质量边信息具有优化作用。In distributed video coding/decoding system, there will be a big gap between the original video frame and the side information under the circumstance that the details of the changes are rich. It makes the quality of decoding frame reduced. In order to detect the quality of decoding frames and improve system performance by optimising the low-quality decoding frames, in this article we present a distributed decoding detection and optimisation algorithm which is based on the correlation. The correlations are calculated at the coding side and the decoding side respectively, the confidence values are then obtained to carry out the decoding detection. For low quality pixel blocks, they are reconstructed by correlations as well as motion estimation. Finally the optimised pixel blocks are generated by filtering and hi-directional motion compensation. Experimental results show that the proposed algorithm can optimise the low quality side information.

关 键 词：分布式视频编码 WYNER-ZIV编码 边信息 解码优化 运动估计 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]