METHOD AND DEVICE FOR ENCODING THREE-DIMENSIONAL IMAGE, AND DECODING METHOD AND DEVICE

Disclosed is a method for encoding an image through motion vector prediction which can be applied to a three-dimensional image, an encoding device, a decoding method, and a decoding device. The encoding method is an encoding method for a current prediction unit in a three-dimensional image, and comprises the steps of: selecting a motion vector of a peripheral block having the same depth as a current prediction unit as a candidate prediction motion vector of the current prediction unit, among motion vectors of already-encoded peripheral blocks of the current prediction unit; and performing inter prediction based on the candidate prediction motion vector, predicting a motion vector of the current prediction unit, and transmitting the motion vector to a decoder. Thus, a candidate for a prediction motion vector can be efficiently selected with respect to a three-dimensional image having depth information.