MOVING VECTOR PREDICTIVE CODING METHOD AND MOVING VECTOR DECODING METHOD, PREDICTIVE CODING DEVICE AND DECODING DEVICE, AND STORAGE MEDIUM STORED WITH MOVING VECTOR PREDICTIVE CODING PROGRAM AND MOVING VECTOR DECODING PROGRAM

摘要

A motion vector predictive encoding method for encoding a target block of a frame, the method comprising: determining a motion compensation mode of the target block; determining the motion compensation mode of an already-encoded block; calculating a representative motion vector from a global motion vector of the already-encoded block, if the motion compensation mode of the already encoded block is a global motion compensation mode; clipping the representative motion vector to a boundary of a predetermined range if the representative motion vector is outside the predetermined range; predicting the motion vector of the target block based on the representative motion vector of an already-encoded block; calculating a prediction error based on the predicted motion vector and the motion vector of the target block; and encoding the prediction error of the motion vector.