The present invention includes determining a motion vector candidate set of a current block, obtaining motion vector indication information of a current block from a video signal, extracting the motion vector candidate corresponding to the motion vector indication information from the motion vector candidate set, determining a predicted motion vector of the current block based on the extracted motion vector candidate, deriving a motion vector of the current block based on the predicted motion vector and a motion vector difference of the current block, and performing motion compensation on the current block based on the derived motion vector.