| 摘要 |
The present invention relates to a device and a process for motion-compensated recursive filtering and a corresponding coding system. The device comprises in particular a blockwise motion estimation module (2), means (3) for determining a recursivity noise level (sigmarec), a module (4) for calculating a prediction error (epsi), a module (5) for calculating a recursivity coefficient (alpha) as a function of the recursivity noise level and of the prediction error, means (6) for calculating a motion-compensated image and means of filtering (7, 8) producing a weighting, by the recursivity coefficient, of the current input image and of a filtered and motion-compensated image stored previously. The device also comprises means (3) for determining an immobility noise level (sigmaimm), and an assembly (11, 12) for processing zones constituting partitions of the blocks employed for the motion estimation, zeroing the motion vectors (d) associated with the zones in which the FDs are below a threshold dependent on the immobility noise level.
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