FIELD: information technology.
SUBSTANCE: image decoding apparatus includes: a reference picture comparing unit for determining whether a reference picture of a candidate block and a reference picture of a current block are long-term reference pictures, wherein the candidate block is one of a plurality of candidate blocks adjacent to the current block; and a motion vector determiner for, if the reference picture of the candidate block and the reference picture of the current block are long-term reference pictures, obtaining a spatial motion vector prediction candidate without scaling the motion vector of the candidate block, if the reference picture of the current block and the reference picture of the candidate block are different short-term reference pictures, obtaining a spatial motion vector prediction candidate by scaling the motion vector of the candidate block, determine motion vector prediction of the current block from among motion vector prediction candidates and generating a motion vector of the current block using motion vector prediction.
EFFECT: high efficiency of motion vector prediction processing.
28 dwg, 1 tbl
