Video error concealment using spatio-temporal interpolation with snakes

A novel post processing method for error concealment in video sequences is presented. The proposed approach tracks the contours in the area surrounding the damaged blocks, by using the information available at previously decoded frames. Tracking is performed in two steps: first a coarse estimation of the position is achieved through motion compensation and then, the matching is refined using snakes. The snakes and the relevant texture information are then extrapolated in the lost area to conceal it. Experimental results show that the proposed method allows achieving seamless reconstruction of large picture losses.