Given a multiscaling function with symbol $H(z)$, its low-pass product filter has the symbol $P(z) = H(z) H(z)^*$. We are interested in finding $H(z)$, given a $P(z)$ with desirable features. Unfortunately, desirable $P(z)$ cause numerical problems with the factorization algorithm. I will describe the setup of the problem, and various attempts to speed up its convergence and improve accuracy.

This presentation is part of Contributed Presentation “CP5 - Contributed session 5”

Authors:

Fritz Keinert (Iowa State University)

Keywords:

matrix spectral factorization, multiwavelet construction