Method and installation for broadcasting compatible high-definition programmes

摘要

The process is particularly suitable for the diffusion of programs hd - mac. The analysis signal of source image to a - sampling space-time - time and to a filtering not - for the linear motion compensation, leading to transmit the representative points of a same image source on at least two successive transmission frames t1, t2, and to transmit at the same time as the image of the assistance data defining a field of motion vectors. In order to improve the compatible image supplied by a first generation receiver, the second analysis frame corresponding to a same image source to a temporal attenuation in the direction of movement. This attenuation depends on the motion vector and leads to allocate to each point of said parts, a position intermediate between its position in the source image analyzed and its position b is predicted in the direction of movement.