基于拟合平面插值的时域错误隐藏算法研究

摘要

In a wireless transmission,H.264/AVC compressed video stream can result in lower quality of image reconstruction by the mismatch of motion vectors,a temporal error concealment algorithm based on the fitting plane interpolation algorithm is proposed.This algorithm reconstructs the motion vector of the damaged macro-block by the fitting plane algorithm,and uses the outer boundary matching algorithm to select the best motion vector to reconstruct the damaged images.This algorithm not only avoids the block effects that caused by the original algorithm,but also in different probability of RTP packet losing,the peak signal to noise ratio of the algorithm has improved 0.2 dB~0.8 dB compared to the adaptive boundary matching algorithm.%针对H.264/AVC压缩视频码流在无线信道传输过程中由于运动矢量失配导致图像重构质量下降的问题,提出了一种基于拟合平面插值的时域错误隐藏算法.该算法主要利用平面拟合算法对受损宏块运动矢量进行重建,同时采用外边界匹配算法选取最优运动矢量对受损图像进行恢复重建.实验表明,该算法不仅避免了原始算法产生的方块效应,而且在不同的RTP丢包概率下,该算法比自适应外边界匹配算法得到的峰值信噪比有0.2 dB~0.8 dB提升.