1. A method of decoding video data, the method comprising: performing, by one or more processors or circuits, a disparity vector derivation process to derive a disparity vector for a current block of the video data, wherein performing the disparity vector derivation process comprises: when either a first or a second spatial neighboring block has a disparity motion vector or an implicit disparity vector, converting, by the one or more processors or circuits, the disparity motion vector or the implicit disparity vector to the disparity vector for the current block, wherein the disparity vector derivation process does not determine whether any spatial neighboring blocks in addition to the first and second spatial neighboring blocks have disparity motion vectors or implicit disparity vectors even if neither of the first or the second spatial neighboring blocks has a disparity motion vector or an implicit disparity vector; and reconstructing, by the one or more processors or circuits, a sample block for the current block in part by performing, based on the derived disparity vector, inter-view motion prediction for the current block, wherein the current block is in a first view and performing inter-view motion prediction comprises: identifying, by the one or more processors or circuits, based on the derived disparity vector, a corresponding block in a second view different from the first view; and using, by the one or more processors or circuits, motion vectors of the corresponding block as a candidate of a list, wherein the list is in a group consisting of a merge list for the current block and an Advanced Motion Vector Prediction (AMVP) candidate list for the current block.