motion vector coding method and the motion vector decoding method

"VECTOR METHOD coding MOVEMENT AND METHOD OF MOTION VECTOR decoding". The invention relates to a motion vector coding unit (117) which performs a peripheral block specification step (S100) for specifying a peripheral block around a block to be coded, determining steps (S1O2 and S104) to determine whether the peripheral block is coded using a motion vector of other blocks, the prediction step (S106 and S108) for deriving motion vector prediction value of the block to be coded by vector using movement obtained from another motion vector of the block as the motion vector of the peripheral block and a coding step (S110) for encoding the block motion vector to be encoded using the prediction value.