Efficient minimum-phase prefilter computation using fast QL-factorization

  • Authors:

  • Morten Hansen;Lars P. B. Christensen

  • Affiliations:

  • Technical University of Denmark, Informatics and Mathematical Modelling, Build. 321, DK-2800 Lyngby, Denmark;Nokia Denmark, Frederikskaj 5, DK-1790 Copenhagen V, Denmark

  • Venue:
  • ICASSP '09 Proceedings of the 2009 IEEE International Conference on Acoustics, Speech and Signal Processing
  • Year:
  • 2009

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Abstract

This paper presents a novel approach for computing both the minimum-phase filter and the associated all-pass filter in a computationally efficient way using fast QL-factorization. A desirable property of this approach is that the complexity is independent of the size of the matrix being QL-factorized. Instead, the complexity scales with the required precision of the filters as well as the filter length.