APPARATUS AND METHOD FOR ENCODING/DECODING DIFFERENTIAL MOTION VECTOR, AND APPARATUS AND METHOD FOR ENCODING/DECODING VIDEO USING SAME

摘要

Disclosed are an apparatus and a method for encoding/decoding a differential motion vector, and an apparatus and a method for encoding/decoding a video using same. The differential motion vector encoding apparatus according to one embodiment of the present invention comprises: a unit for setting resolutions for each area, which sets resolutions of different motion vectors for each search area in accordance with a predictive motion vector of a current block; a motion estimating unit, which estimates motion by means of the resolutions corresponding to each search area so as to generate a motion vector; a differential motion vector calculating unit, which calculates a differential motion vector between the generated motion vector and the predictive motion vector; and a differential motion vector encoding unit, which encodes the calculated differential motion vector to a resolution corresponding to the generated motion vector.