作　　者： ; ; ; ; ;

机构地区： 杭州电子科技大学通信工程学院

出　　处： 《光电工程》 2013年第11期62-70,共9页

摘　　要： 三维视频是当前视频服务的演进趋势,采用可分级B帧(Hierarchical B Pictures,HBP)编码结构的多视点视频是三维视频的主要数据格式。针对压缩后多视点视频在无线传输中易发生数据包丢失,提出了一种面向HBP编码结构的多视点视频I帧错误隐藏方法。隐藏过程分三大步:首先利用多视点视频编码中图片组长度短的特点,把I帧图片分成前景区和背景区;然后,对背景区丢失块采用直接拷贝法进行掩盖;最后,对前景区丢失块采用自适应方向性插值法进行错误掩盖。实验结果表明,提出的方法在主客观质量上都优于常用的I帧错误隐藏法,并有效地降低了视点间错误传递。 Three-dimensional video （3DV） will be the next step in the evolution of video services. Multi-view video using Hierarchical B Pictures （HBP） coding structure may be the main data format of 3DV. To address the problem of data packet loss during transmission of compressed multi-view video over wireless channel, we propose an intra-frame Error Concealment （EC） method for multi-view video with HBP structure. The concealment process is performed in three steps First, we divide an intra-frame into background and foreground regions by utilizing the characteristic of short length of Group of Pictures （GOP） in multi-view video coding. Second, direct copy is applied to lost background blocks. Finally adaptive orientation interpolation is used to conceal lost foreground blocks. The experimental results demonstrate that the proposed method outperforms the previous state-of-the-art intra-frame EC methods based on both subjective and objective measures, and decreases the effect of error propagation across view

关 键 词： 错误隐藏 方向性内插 可分级 帧 多视点视频编码

领　　域： [电子电信] [电子电信]