Method for deriving motion information in multi-layer structure and apparatus using the same

The present invention relates to a video encoding method, video decoding method and apparatus using the same in the multi-layer structure, the video decoding method according to the present invention includes the steps of identifying the current layer, the reference position for specifying a current block in the current layer, a reference layer in scaling the phase and the induced motion information for deriving the motion information to a step, based on the size of the motion information storage unit in the reference layer, a reference position for specifying a reference layer, a reference position corresponding to the current layer, the reference position of the current and a layer comprising the step of inducing a motion vector used for restoring the picture.