Wyner-Ziv系统中MCTI边信息生成算法  

Generation Algorithm of Side Information Based on MCTI in Wyner-Ziv Video Coding

作　　者：闵锐[1] 甘会峰 柴亚州 尹雷波 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《军事通信技术》2014年第1期26-30,共5页Journal of Military Communications Technology

摘　　要：Wyner-Ziv视频编码的特点是编码简单、解码复杂,适用于无线通信系统中资源受限的视频编码设备。在Wyner-Ziv视频编码系统中,为获得高质量的解码图像,边信息构造算法起着重要作用。文章首先利用前向和后向运动估计得到最初的运动矢量,然后采用双向运动估计和运动补偿时域插值方法生成边信息,针对边信息中出现的块效应和重叠现象,利用加权重叠块运动补偿技术加以解决。实验结果表明,所提出的加权运动补偿算法要优于已有的双向运动补偿算法,且可获得较理想的边信息重构。With the characteristic of simple encoding and highly complex decoding,WynerZiv video coding is applied to the resource-constrained video coding equipments of the wireless communication system.Side information construction in Wyner-Ziv video coding plays an important role which strongly influences the final quality of the restructured images.Forward and backward motion estimation was executed to find an initial motion vector field,and then the bi-directional motion estimation and motion compensated time interpolation were adopted.To reduce the block artifact and improve the overlapped block,the adaptive weighted and overlapped motion compensation were used.Experimental results show that the proposed weighted motion compensation strategy is better than the existing bi-directional motion compensated algorithm and can be achieved a better reconstruction of the side information.

关 键 词：分布式视频编码 重叠块运动补偿 边信息 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]