Method and apparatus for motion vector encoding/decoding using motion vector predictor

PURPOSE: A method for encoding and decoding a motion vector by using a motion vector predictor and a device thereof are provided to increase encoding efficiency by efficiently encoding and decoding the motion vector. CONSTITUTION: When an MV(Motion Vector) encoding/decoding device performs MV prediction, the device performs a step(0) for inducing a left MV predictor, a step(1) for inducing an upper-end MV predictor, and a step(2) for inducing a temporal MV predictor. When the three MV predictors are induced, the device checks redundancy of an MV to remove a MV predictor having the same MV from an MV predictor list. [Reference numerals] (AA) When performing motion vector prediction; (BB) [0]step of inducing a left motion vector predictor; (CC) [1]step of inducing a right motion vector predictor; (DD) [2]step of inducing a temporal motion vector predictor; (EE) Image encoding/decoding method and apparatus performing the above in parallel