基于场景检测的自适应空时域误码掩盖算法

Adaptive Spatial-time Error Concealment Algorithm Based on Scene Change Detection

针对JM方案没有考虑场景变换对误码掩盖影响的不足,提出了一种基于场景检测的空时域自适应误码掩盖算法。该算法首先检测当前帧是否为场景变换帧,再根据帧类型为I帧或P帧自适应选择时域或空域误码掩盖方法。实验证明,该算法能有效地解决场景变换对误码掩盖的影响,取得很好的主观及客观视频质量。

In view of the shortcomings of JM, which the influence of scene change on error concealment is not cosidered, an adaptive spatial-time domain error concealment method is proposed based on scene change detection in this paper. With this method, whether there is a scene change in current frame is judged, and then the spatial-domain or time-domain error concealment method adaptively based on the types of the frame is chosen. Simulation results demonstrate its considerable improvement on objective and subjective quality of reconstructed pictures, and it proved that the proposed method can eliminate the negative effect on error concealment by scene change.