IMAGE CODING APPARATUS AND METHOD FOR PREDICTING MOTION USING ROTATION MATCHING

摘要

An image coding apparatus and method for increasing the compression rate of a video signal by predicting a motion through rotation matching are provided. In the image coding apparatus for encoding an image signal, a motion predictor calculates MVs by estimating the motion of a previous frame being a reference frame to an input present frame, a rotation and matching unit calculates rotation angles of the present frame by estimating the rotation of the previous frame to the present frame, a rotation recoverer recovers the reference frame according to the rotation angles, a motion compensator reconstructs the rotation-recovered frame using the MVs and outputs a motion-predicted frame, and a coder generates a difference signal between the present frame and the motion-predicted frame and encodes the difference signal, the MVs, and the rotation angles.