关键词: 误码掩盖, 错误跟踪, 匹配准则, 运动矢量

Abstract:

A new error temporal concealment algorithm for recovering the loss or erroneously received motion vectors is presented. To alleviate the effect of transmission errors, an error tracking model is adopted to estimate the mean square error (MSE) of each pixel in the decoder. Then, the MSE is added into the boundary matching algorithm to evaluate the goodness of boundary matching and interior pixel reliability of recovered macroblocks. Simulation shows that the proposed technique is superior to conventional temporal concealment techniques and demonstrates fairly good robustness in various lost rates of inter-coded macroblocks.

Key words: error concealment, error tracking model, matching algorithm, motion estimation