一种矢量外推与边界匹配相结合的视频通信误码掩盖算法

An Error Concealment Algorithm Based on Motion Tracking and Boundary Matching in Video Communication

针对无线视频通信中因视频数据传输丢失或误码导致重建图像质量急剧下降的问题,提出了一种基于运动矢量外推与边界匹配相结合的时域误码掩盖算法。对于受损块,采用运动矢量外推方法估算其时域相关运动矢量,然后利用受损块与邻域块的空间相关性,基于改进的边界匹配算法在时域相关运动矢量的邻域内寻找受损块运动矢量,从而实现受损数据的误码掩盖。仿真结果表明,对不同视频序列,该算法均可比传统算法恢复出更高质量的图像。

To overcome the degradation of video quality caused by compressed data loss or error in wireless video communication, a novel error concealment algorithm based on motion tracking and boundary matching is proposed. For a lost block, the temporal related motion vector is first calculated by the motion vector tracking method, and then the recovery motion vector is obtained by using modified boundary matching method which efficiently exploits the correlation between lost block and adjacent blocks. The simulation results show that compared with the traditional algorithms, the proposed algorithm can obtain better reconstruction quality and prevent error propagation in different video sequences.