Patent ID: 9020034
Filing Date: 2015-04-28
Classification: H04N

Abstract:
1. A moving picture coding method for performing a predictive-coding on a current block in a moving picture, the moving picture 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 by using motion vectors of the plurality of neighboring blocks; obtaining a motion-compensated image by using the determined motion vector; coding a differential motion vector between the determined motion vector of the current block and the predicted motion vector; and coding a difference image between the current block and the motion compensated image, wherein the deriving of the predicted motion vector includes: selecting a motion vector which refers to the same reference picture as referred to by the motion vector of the current block, from among motion vectors of the plurality of neighboring blocks having the same identifier 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, and when the selected motion vector of the plurality of neighboring blocks is only one, deriving the one selected motion vector as the predicted motion vector of the current block.