HEVC中基于前后景区域的错误隐藏  

Error Concealment Based Foreground and Background for HEVC

作　　者：刘畅[1,2] 马然[1,2] 刘德阳[1,2] 张兆杨[1,2] 

机构地区：[1]上海大学通信与信息工程学院,上海200072 [2]新型显示技术及应用集成教育部重点实验室,上海200072

出　　处：《电视技术》2012年第15期8-11,35,共5页Video Engineering

基　　金：国家自然科学基金重点项目(60832003)

摘　　要：新一代视频编码标准HEVC采用四叉树编码结构,能够高效地进行视频编码,尤其适用于高清视频。然而,网络信道的不可靠性会导致视频数据的受损或丢失,HEVC的编码特性决定了视频数据的受损或丢失可能会发生在不同尺寸编码块中。因此,在分析各种不同尺寸编码块自身特性的基础上,提出首先对视频进行前景、后景区分,其中利用OBMA算法区分出边界处与运动物体,然后对于不同区域的错误块分别进行隐藏。The next-generation video coding standard, called High E^ciency Video Coding （HEVC）, uses quardtree structures to encode the video efficiently, which is especially adopt for HD video. However, the reliability of network channel may lead to the loss or corruption of video data. And the enco- ding characteristics of HEVC determine that error data may appear in the coding blocks with different size. Therefore, the characteristics of different size blocks are analyzed in this paper. Then, a distinction between foreground mad background is made. Especially, the OBMA algorithm is used to detect that whether the error block is belong to boundaries or moving objects, different error concealment methods for error blocks in different regions are proposed at last.

关 键 词：HEVC 编码块 错误隐藏 

分 类 号：TN949.197[电子电信—信号与信息处理]