Error concealment of still image and video streams with multi-directional recursive nonlinear filters

A novel approach for error concealment in block-based image and video coding systems over the ATM networks is presented. This new approach aims at reconstructing the lost pixels in the intra-coded frames by spatial interpolation of the nearest undamaged pixels with a recursive multi-directional nonlinear filtering scheme. The lost interframe information are also reconstructed by using robust nonlinear filtering of the adjacent and previous motion vector blocks. We assume that the important synchronization and header information of the compressed bit streams are packed into high priority ATM cells and an integral number of macroblocks are packed into normal cells for efficient transmission. Finally, simulation results are provided to illustrate the effectiveness of the proposed method.