Patent ID: 6944230
Filing Date: 2005-09-13
Classification: H04N

Abstract:
1. Device for the motion-compensated recursive filtering of video images before coding, comprising: means of storage of at least one input image, a blockwise motion estimation module, designed to produce motion vectors (d) blockwise and quantities representative of variations in motion-compensated images (DFD), on the basis of a current input image and of at least one input image stored previously in the said means of storage, means for determining a recursivity noise level (σ a module for calculating a prediction error (ε), between a current input image and an image predicted previously by filtering and motion compensation, a module for calculating a recursivity coefficient (α) as a function of the said recursivity noise level (σ means for calculating a motion-compensated image on the basis of a filtered image and of the said motion vectors (d), means of filtering, intended to produce a weighting of the current input image and of a filtered and motion-compensated image stored previously, by the recursivity coefficient (α), and means of storage of at least one filtered and motion-compensated image, produced by the means for calculating motion-compensated images, wherein the said filtering device comprises: means for determining an immobility noise level (σ an assembly for processing zones constituting partitions of the said blocks employed for the motion estimation, comprising: