IEEEXplore# A simple method for designing high-quality prototype filters for M-band pseudo QMF banks

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A simple method for designing high-quality prototype filters for M-band pseudo QMF banks

Creusere, C.D. Mitra, S.K.
Naval Air Warfare Center, China Lake, CA, USA;
This paper appears in: Signal Processing, IEEE Transactions on [see also Acoustics, Speech, and Signal Processing, IEEE Transactions on]
Publication Date: April 1995
Volume: 43 , Issue: 4
On page(s): 1005 - 1007
ISSN: 1053-587X
Digital Object Identifier: 10.1109/78.376856
Current Version Published: 2002-08-06

Abstract
Discusses a new method for designing the prototype filters necessary to implement M-band pseudo QMF banks. This method does not rely on the traditional nonlinear optimization used in past work but rather optimizes a single parameter on a convex error surface, consistently delivering the best equiripple filter possible while minimizing the overlapped passband distortion. A very simple algorithm for designing lowpass prototype filters suitable for use in pseudo QMF banks is described. To illustrate the applicability of this algorithm, two different filters are designed, both for such applications as wideband audio coding that require high quality reconstructed signals

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