一种基于边缘判决的空域差错掩盖算法

Spatial Error Concealment Based on Judgement on Edge Information

提出了一种基于边缘判决的解码视频空域差错掩盖算法。该算法首先对丢失块邻域中的像素进行边缘检测,并对检测出的边缘判断其是否会穿过丢失块。然后使用方向选择过程提取多个候选插值方向,并通过边界像素灰度差决定最终插值方向。实验结果表明本算法有效地提高了错误图像的掩盖效果。

An efficient spatial error concealment algorithm is proposed for corrupted image by transmission losses in this work. Firstly, information of edges in the neighboring blocks is extracted by judging which edges may traverse the loss block. Then, all detected edges are divided into relevant and irrelevant edges. Subsequently, one or more directions for interpolation can be selected from the relevant edge set by minimizing the boundary pixel difference for each direction. Experimental results demonstrate the better performanee of the proposed methods as comoared to orevious techniques.