Patent ID: 7702168
Filing Date: 2010-04-20
Classification: H04N

Abstract:
1. A process for a differential coding of a current image block in a first reference image on a basis of a predicted image block in a second reference image, the reference images flanking one or more images of bidirectional type or type B whose differential coding can take account of the blocks of these reference images, comprising steps of using a coding device to perform: calculating, for a candidate block in the second reference image, a difference between the current block and the candidate block designated by a motion vector Vp which is allocated to the current block; calculating, for said candidate block, a difference between a co-located block of the current image block in an image of type B and the block in a reference image, the latter block being designated by a colinear motion vector, which is allocated to the co-located block and is colinear with the motion vector Vp; selecting a predicted image block as the one, among the candidate blocks, minimizing a function of at least the two calculated differences, to give a selected predicted image block; and differential coding of the current image block by using said selected predicted image block.