A nonlinear diffusion-based three-band filter bank
Benazza-Benyahia, A.; Pesquet, J.-C.; Krim, H.
Signal Processing Letters, IEEE
Volume 10, Issue 12, Dec. 2003 Page(s): 360 - 363
Digital Object Identifier   10.1109/LSP.2003.818864
Summary: In this letter, we revisit a number of concepts that have recently proven to be useful in multiresolution signal analysis, specifically by replacing the now classical linear-scale transition operators by nonlinear ones. More precisely, we address the problem of designing appropriate operators associated to nonlinear filter banks using multiscale analysis. We first establish a connection between nonlinear filter banks and partial differential equations operators used in scale-space theory. Toward this end, we propose specific structures of nonlinear three-band decompositions ensuring a perfect reconstruction. The behavior of the proposed structures is analyzed for a step-like signal in a high SNR scenario, and a simulation is proposed for a more complex scenario.

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