H.264高清视频解码实时错误掩盖算法  

Real-time Error Concealment Algorithm for H.264 High Definition Video Decoding

作　　者：谢涛[1] 李志华[1] 黄轶伦[1] 

机构地区：[1]浙江大学数字技术及仪器研究所,杭州310027

出　　处：《计算机工程》2011年第14期9-11,17,共4页Computer Engineering

基　　金：国家自然科学基金资助项目(61001170)

摘　　要：针对IP网络丢包条件下的H.264高清视频实时解码问题,分析高清视频码流的特点,提出一种实时错误掩盖算法。该算法利用丢失片的边缘宏块信息,以垂直距离为权值加权平均预测得到错误宏块的运动矢量,进而完成错误掩盖。实验表明,与Joint模型中的错误掩盖算法相比,该算法提升了重建图像的主观质量和客观质量,计算复杂度较低,错误掩盖效果较好,适用于高清实时解码。Aiming at real-time decode H.264 video on IP network with packet losses,an effective error concealment algorithm is proposed depending on the analysis of high definition video streams.By use of the edge macro-blocks information of the lost slice,the motion vector of corrupted macro-block is predicted,and the error concealment is completed.Experimental results show that,compared with the error concealment of Joint Model（JM）,the proposed algorithm improves the objective quality and subjective quality of reconstructed images.The algorithm does not increase the complexity of the decoding,but achieves better recovery results.It is ideal for real-time decoding for high definition video.

关 键 词：H.264标准 错误掩盖 高清视频 实时解码 运动矢量估计 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]