Patent ID: 8649622

Claim:
A method for a moving picture decoding device to predict a motion vector, comprising: remapping, by the moving picture decoding device, a default indexing order for a plurality of reference pictures, based on remapping information; obtaining, by the moving picture decoding device, at least one motion vector of a block other than a current block, referring to at least one reference picture pointed to by a reference picture index for a plurality of reference pictures; obtaining, by the moving picture decoding device, a first picture order count value of a current picture including the current block, wherein the first picture order count value represents a display order of the current picture; obtaining, by the moving picture decoding device, a second picture order count value of the at least one reference picture, wherein the second picture order count value represents a display order of the at least one reference picture; comparing, by the moving picture decoding device, the first picture order count value of the current picture including the current block with the second picture order count value of the at least one reference picture; and predicting, by the moving picture decoding device, the motion vector of the current block from the at least one motion vector of the other block, based on the comparison step.