1. A method ( 800, 820 ) for compression video information, characterized in that it comprises the steps of: projecting ( 803 ) points of a next image to a three-dimensional space using camera parameters and depth map, and projecting ( 805 ) projected points from the three-dimensional space to reference image surface, thereby obtaining motion vectors for estimating changes between the next image and the reference image, wherein the depth-map is derived from a depth map residing in the memory of a display controller of a computer.