Abstract: Aiming at the problem that the compressed video stream will inevitable be corrupted because of the wireless channel errors, which may degrade the reconstructed image quality, this paper presents an efficient temporal error concealment method which based on improved border-matching function and flexible macroblock mode of H.264 video standard. It utilizes the relativity between lost macroblock and other surrounding macroblocks to predict the block mode, and estimates the motion vector of the lost macroblock depending on the block mode. Simulation results under 3GPP/3GPP2 wireless channel show the proposed method performs better quality than other approaches with the same RTP packet loss rate.

Key words: H.264 video standard, error concealment, wireless video communication, macroblock mode

摘要： 针对压缩视频码流在无线信道传输过程中由于数据丢失或错误而导致的重构图像质量的问题，提出一种时域错误隐藏方法。在对边界匹配函数改进的基础上，根据H.264视频标准具有灵活的宏块分割模式的特点，利用受损宏块与其周围宏块的相关性预测分块模式进行运动矢量估计。实验结果表明，在相同的RTP包丢失率情况下，该算法与其他算法相比，能恢复出更高质量的图像。

关键词: H.264视频标准, 错误隐藏, 无线视频通信, 宏块模式

CLC Number: 

• TP37