DISPLACEMENT ARRANGEMENT DERIVATION DEVICE, DISPLACEMENT VECTOR DERIVATION DEVICE, DEFAULT REFERENCE VIEW INDEX DERIVATION DEVICE, AND DEPTH LOOKUP TABLE DERIVATION DEVICE

摘要

In the displacement arrangement derivation device in non-patent document 1, since four subblock points are used, the large amount of processing for depth access is a problem. In the displacement vector derivation device in non-patent document 1, there is a problem in that implementation is complicated because it is necessary, when merge candidates are used, to distinguish between cases of skip mode and cases of inter mode where a merge flag is 1. In the default reference view index derivation device in non-patent document 1, there is a problem in that implementation is complicated because a reference picture list is consulted multiple times in order to search a default reference view index that is set in order from 0. In the depth lookup table derivation device in non-patent document 1, there is a problem in that implementation is complicated because two candidates idxLower and idxUpper are derived and compared. The present invention provides: a displacement arrangement derivation device that derives a representative depth value using depth values for two points located horizontally in a subblock, and derives a displacement vector from the derived representative depth value; a displacement vector derivation device that, in the event that the mode of an adjacent block is skip mode or the adjacent mode is inter mode and a merge flag is 1, configures the displacement vector of the adjacent block to the derived vector; a default reference view index derivation device that, in the event that the view index of a reference picture differs from the view index of a target picture and the POC of the reference picture is equal to the POC of the target picture, configures the view index of the reference picture to a default reference view index; and a depth lookup table derivation device that configures, as a depth index conversion table DepthValue2Idx, the index candidate, from among an i-1 index candidate and an i index candidate, in which the absolute value of difference between an Idx2DepthValue [] value of the index candidate and a variable is smaller.