1. A method of predicting a motion vector for a current block in a current picture by a moving picture decoding device, the method comprising: remapping, by the moving picture decoding device, reference picture indices 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 the current block, wherein said other block is associated with at least one reference picture indicated by a reference index for a set of multiple reference pictures, said other block is in a bi-predictive mode or in a direct mode; obtaining, by the moving picture decoding device, a first picture order count value of the current picture, 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 with the second picture order count value of the at least one reference picture; predicting, by the moving picture decoding device, the motion vector for the current block using said at least one motion vector, based on the comparison; and decoding the current block in the current picture using the predicted motion vector.