Method of calculation of motion vectors

A method of decoding images, characterized by: assigning first indices to pictures preceding a current picture in display order are smaller than the first index assigned to pictures following the current picture, the first indexes associated blocks included in the current image with each image that is concerned by blocks; assign seconds indices pictures following the current picture in display order that are smaller than the second indexes assigned to images that precede the current image, the second indexes associated blocks included in the current image with each image to It referred by blocks; select the first smallest index of the images to which refer for the adjacent blocks as the first reference image, neighboring blocks that are in the vicinity of a current block in the current image an image; select with the second smallest index of the images to which refer for the adjacent blocks as a second reference image an image; decoding the current block using at least the first reference picture and the second reference image.