基于场景转换检测的混合差错掩盖方法

Hybrid error concealment with scene cut detection

提出了一种基于场景转换检测的混合差错掩盖法。该方法通过场景转换检测,充分利用时域信息重建图像,并将场景转换检测中收集的信息用于局部运动的判断,以便将时域掩盖法引入I帧,而在发生场景转换时,使用权值随距离自动调整的空域掩盖法。仿真实验表明,该方法在满足实时视频要求的条件下,可有效地恢复视频差错与抑制视频差错的扩散,取得较好的差错掩盖效果。

The bitstream of real- time compressed video is often corrupted by channel errors of losing packet in Intemet. To solve this problem, a hybrid error concealment with scene cut detection （HEC- SCD） is proposed. This algorithm can make full use of temporal information to rebuild image with scene cut detection. The temporal EC is used to rebuild I frames according to the information that is collected from scene cut detection for the local movement. When a scene change occurs, the spatial EC with adaptive weight is used. The simulation result shows that the proposed algorithm can efficiently improve porformance of error concealment in real - time video transmitting.