A sequential error concealment technique based on spiral recovery order

This paper presents a sequential error concealment (EC) method to combat the packet loss of the video/image transmission over the unreliable channels. A simplified Gaussian Markov random filed (GMRF) is employed as a priori image model. And a reconstruction equation is established between the pixel to be recovered and its neighborhood. To keep better pixel fidelity, the recovery process is conducted in a spiral manner. Experiments show that it outperforms the traditional classic EC method 1-2 db in PSNR. Compared to the state of the art EC technique we have seen (Xin Lin and M.T. Orchard, 2002), it is only slight lower in PSNR while much computational loads can be saved.