ABSTRACT
Error resilience is an important issue when coded video data is transmitted over wired and wireless networks. Error can be introduced by network congestion, mis-routing and channel noise. Spatial localization encompasses the methods aimed at minimizing the extent to which errors propagate within a picture, by providing early re-synchronization of the elements in the bitstream that are coded differentially between MBs. The purpose of concealment is to minimize the impact of an error once it occurs by taking account of spatial correlation and temporal redundancy in the video sequence. Since motion compensated concealment attempts to take account of motion within the video sequence, it allows for effective concealment of both the moving and the non-moving areas of the picture. The Boundary Matching Algorithm estimates the lost motion vector as the one in which the squared difference between the surrounding lines and the block is a minimum.
