Motion estimator and motion estimating method thereof

摘要

A motion estimator and motion extracting method are provided for dividing a current frame into a plurality of blocks and estimating a motion comparing a current block with a previous frame. The motion estimator includes a mean motion estimation unit for computing a mean motion vector based on motion vectors of surrounding blocks adjacent to the current block, a line motion generation unit for generating a line motion vector in a predetermined search area based on motion vectors of horizontal blocks of the current block, and a motion vector selection unit for selecting and outputting one of the mean motion vector and the line motion vector as a final motion vector of the current block based on a mean motion expectation error value in accordance with the mean motion vector and a line motion expectation error value in accordance with the line motion vector.