CONF KRS01/IDIAP Signal modeling with Non Uniform Topology lattice filters Krstulović, Sacha Bimbot, Frédéric EXTERNAL http://publications.idiap.ch/attachments/papers/2001/sacha-ic01sk.pdf PUBLIC Proc. ICASSP 2001 ii 2001 This article presents a new class of constrained and specialized Auto-Regressive (AR) processes. They are derived from lattice filters where some reflection coefficients are forced to zero at a priori locations. Optimizing the filter topology allows to build parametric spectral models that have a greater number of poles than the number of parameters needed to describe their location. These NUT (Non-Uniform Topology) models are assessed by evaluating the reduction of modeling error with respect to conventional AR models.