| 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 (sigma<SUB>rec</SUB>), a module ( 4 ) for calculating a prediction error (epsilon), 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 (sigma<SUB>imm</SUB>), 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. |
