A METHOD FOR PREDICTIVE CODING OF DEPTH MAPS AND A DEPTH MAP ENCODER

摘要

A method for predictive encoding of a depth map, comprising the steps of: receiving (101) a depth map; dividing (102) the depth map to blocks; performing (103) quad-tree decomposition of the depth map to sub-blocks; approximating (104) each of the sub-blocks by a plane, the plane being associated with three plane points ( p 0 , p 1 , p 2 ); providing an encoded depth map in a form of a set of planes defined by parameters. The method further comprises: determining (105) an order of coding of the sub-blocks; and while encoding consecutive sub-blocks: calculating (106) predictors ( p o , p 1 , p 2 ) for the plane points ( p o , p 1 , p 2 ) of the currently-encoded sub-block (C); calculating (107) differences (” p 0 , ” p 1 , ” p 2 ) between the actual values of the plane points ( p 0 , p 1 , p 2 ) and the values of the corresponding predictors ( p 0 , p 1 , p 2 ), providing (108) the parameters of the plane for the currently-encoded sub-block (C) in form of the differences (” p 0 , ” p 1 , ” p 2 ).