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0010. The foregoing and/or other aspects are achieved by providing a prediction mode generating method, the method including calculating, by at least one processor, a first depth representative value indicating a depth representative value of a current block of a depth image, and a second depth repre sentative value indicating a depth representative value of a reference block corresponding to the current block, calculat ing, by the at least one processor, a depth offset based on the first representative value and the second depth representative value, calculating, by the at least one processor, a motion vector by predicting motion based on a change in a depth of the current block and a change in a depth of the reference block, and generating, by the at least one processor, a predic tion mode having a compensated depth value, based on the depth offset, the motion vector, and reference image informa tion associated …