REPLACEMENT OF SPURIOUS MOTION VECTORS FOR VIDEO COMPRESSION

摘要

A method and system for detecting and replacing spurious motion vectors in video signal compression includes determining whether a motion vector of a current macroblock is spurious by comparing the motion vector with motion vectors of neighbouring macroblocks; and replacing the motion vector as spurious if the difference exceeds a predetermined threshold. The replacement motion vector is derived from neighbouring macroblocks. The method and system may determine whether at least one cluster of motion vectors of neighbouring macroblocks can be formed. If a cluster cannot be formed the motion vector of the current macroblock may remain unchanged but if a cluster can be formed, it is determined whether the motion vector of the current block falls within a cluster. If it falls within the cluster the motion vector remains unchanged. The motion vector is replaced under certain criteria if the motion vector does not fall within a cluster of motion vectors of neighbouring macroblocks.