基于运动物体的时域视频错误隐藏算法

New temporal error concealment method based on motion object

为了减小视频传输中的错误对解码端重建视频质量的影响,提出了一种使用于H.264的基于运动物体的时域错误隐藏算法。分析丢失宏块相邻宏块的运动矢量及灰度值分布,对平坦区域及灰度一致的运动区域先进行错误隐藏,最后对遗漏像素进行隐藏。实验表明,该算法比经典时域隐藏算法提高0.13 dB～1.91 dB,能够很好地保持物体形状,减少块效应,提高了恢复质量。

This paper proposed a new temporal error concealment method for H.264 based on motion object to reconstruct the missing blocks.It analysed the motion vectors and the gray values up and below the missing macroblocks first.Then according to it,concealed the smooth region and the motion region with similar gray values first.Then the missing pixels which still exist were concealed.Experimental results show that the proposed algorithm outperforms traditional algorithm by 0.13 dB～1.91 dB,and it can keep the shape of motion object better and decreases the block effection.