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简单利用插值恢复丢失宏块的运动矢量一般存在较大误差,运动补偿后边界存在明显痕迹。文章针对H.264/AVC的特点,提出了一种自适应时域错误隐藏方法。首先利用丢失宏块周围4×4块的运动矢量寻找视频内容分裂处,划分运动矢量相似区,再根据运动矢量相似区的划分自适应的进行错误隐藏,因此对丢失宏块有更好的恢复效果。实验结果验证了该方法的优越性。
Simply using interpolation to recover the motion vector of the missing macroblock generally has a large error, and there are obvious traces on the boundary after motion compensation. Aiming at the characteristics of H.264 / AVC, this paper proposes an adaptive time domain error concealment method. Firstly, the motion vector of the 4 × 4 blocks around the macroblock is used to search for the video content split, to divide the similar regions of the motion vector, and to adaptively conceal error concealment according to the division of the similar regions of the motion vector so that the lost macroblocks can be recovered better effect. The experimental results verify the superiority of this method.