Frame interpolator, frame interpolation method and motion credibility evaluator

The present invention relates to a frame interpolation device, frame interpolation method and the reliability evaluation device movement. Frame interpolation device according to the present invention includes a motion estimator for estimating an initial motion vector by dividing a current frame into a plurality of reference blocks having a predetermined size, compares a predetermined search area set in the reference block and a previous frame; The reliability evaluation unit for evaluating the reliability of the initial motion vector, generating a reliability evaluation data on the evaluation result; And a frame interpolating unit for interpolating an intermediate frame which is inserted between the present frame and the previous frame based on the initial motion vector and the reliability evaluation data. As a result, it is possible to improve the quality interpolated frame to reduce the blocking artifacts (artifact) phenomenon.