Realization of 2-D variable IIR digital filter structures with a small amount of calculations for coefficient update

Hyuk Jae Jang, Masayuki Kawamata

Research output: Contribution to journalArticlepeer-review

Abstract

This paper proposes 2-D variable TIR digital filter structures with a small amount of calculations for cuefficient update. The proposed realization method uses the 2-D parallel allpass structure derived from the separable denominator 2-D filter as the prototype structure for 2-D variable digital filters. In order to reduce the amount of calculations, all the redundant first-order complex allpass sections are combined by modularization of the variable structure. Furthermore, we can realize a very compact variable structure with a minimal number of first-order complex allpass sections by combining complex allpass sections with their complex conjugate allpass sections. Comparison of the calculation loads of the variable structures is presented to demonstrate that the amount of calculations for coefficient update of the proposed variable structure is far less than that of the original and the modular variable structure.

Original languageEnglish
Pages (from-to)363-374
Number of pages12
JournalMultidimensional Systems and Signal Processing
Volume15
Issue number4
DOIs
Publication statusPublished - 2004 Oct

Keywords

  • 2-D IIR digital filter
  • Calculation load
  • Parallel allpass structure
  • Variable digital filter

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Information Systems
  • Hardware and Architecture
  • Computer Science Applications
  • Artificial Intelligence
  • Applied Mathematics

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