Patent ID: 9020037
Filing Date: 2015-04-28
Classification: H04N

Abstract:
1. A motion vector coding method for deriving a predicted motion vector for a current block to be coded and coding a motion vector of the current block using the predicted motion vector, the motion vector coding method comprising: determining a motion vector of the current block which is used when performing a motion compensation on the current block; specifying a plurality of neighboring blocks which are located around the current block; deriving a predicted motion vector for the determined motion vector of the current block based on motion vectors of the plurality of neighboring blocks; and coding a difference between the determined motion vector of the current block and the predicted motion vector, wherein in the deriving step, the predicted motion vector for the determined motion vector of the current block is derived based on the motion vectors with the same identifier among the motion vectors of the plurality of neighboring blocks as the identifier assigned to the motion vector of the current block when at least one block among the plurality of neighboring blocks has two motion vectors which refer to reference pictures in the same direction in a display order.