Disparity vector derivation based on consistency of depth and disparity in 3D-HEVC

In this paper, we propose a novel disparity vector derivation scheme. In the proposed scheme, the preliminary disparity vector is derived while keeping consistency between the preliminary disparity and depth values of the block in the base view indicated by the preliminary disparity. And then, the final DV is derived from depth value of the block indicated by preliminary DV. The proposed derivation can derive a appropriate disparity even in the case that the disparity vector from neighboring block is disabling. Moreover, the derived DV can be utilized for advanced motion vector prediction in addition to the previous usage. The experimental results show that 0.2% BD-rate reduction with no complexity increase in the reference software of 3D-HEVC.