Structures, factorizations, and design criteria for oversampledparaunitary filterbanks yielding linear-phase filters |
| |
Authors: | Labeau F Vandendorpe L Macq B |
| |
Affiliation: | Commun. & Remote Sensing Lab., Univ. Catholique de Louvain; |
| |
Abstract: | We present here a special class of oversampled filterbanks (FBs), namely, paraunitary FBs with linear-phase filters. We propose some necessary conditions for the existence of such banks, based on the repartition between type I/II and type II/IV linear-phase filters in the bank. For a subset of these FBs, we develop a factorization that leads to a minimal implementation, as well as a direct parameterization of the FBs in terms of elementary rotation angles. This factorization is applied to some design examples, with two different optimization criteria: coding gain and reconstructibility of lost coefficients |
| |
Keywords: | |
|
|