New look at signal-adapted QMF bank design

Research output: Contribution to journalConference articlepeer-review

Abstract

The design of a quadrature-mirror filter (QMF) bank (H, G) adapted to input signal statistics is considered. The adaptation criterion is maximization of the coding gain and has so far been viewed as a difficult nonlinear constrained optimization problem. In this paper, it is shown that in fact the coding gain depends only upon the product filter P(z) = H(z)H(z-1). The optimization problem formulated in terms of the coefficients of P(z) gives rise to a linear semi-infinite program (SIP). A simple SIP algorithm using a discretization method is presented. The filter H(z) is obtained by deflation and spectral factorization of P(z).

Original languageEnglish (US)
Pages (from-to)1312-1315
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume2
StatePublished - Jan 1 1995
Externally publishedYes
EventProceedings of the 1995 20th International Conference on Acoustics, Speech, and Signal Processing. Part 2 (of 5) - Detroit, MI, USA
Duration: May 9 1995May 12 1995

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

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