AVS基于场景变换检测的自适应误码掩盖

Adaptive Error Concealment Based on Scene Change Detection for AVS

AVS(Audio video coding standard)是中国自主制定的音视频编码标准。AVS系统解码器中没有误码检测和掩盖的模块。本文在研究常用误码掩盖方法的基础上,将基于场景变换的自适应误码掩盖方法应用到AVS中。首先判断当前帧是否发生场景变换,根据变换情况自适应地选择时域或空域误码掩盖方法。仿真结果表明,该方法在不过多增加运算复杂度的基础上显著提高误码图像的恢复质量,具有广阔的应用前景。

AVS （Audio video coding standard） is independently developed in China. There is no error detection and concealment in AVS. An adaptive error concealment method is proposed based on scene change detection for AVS. Firstly, it is judge that whether there is a scene change. Based on the result, spatial or temporal error concealment is chosen to recover corrupted pixels. Simulation results show that the method doesn＇t add to much calculation, thus improving the recovered quality.