Implementation of frequency-warped recursive filters

被引：20

作者：

Härmä, A ^{[1
]}

机构：

[1] Aalto Univ, Lab Acoust & Audio Signal Proc, FIN-02015 Espoo, Finland

来源：

SIGNAL PROCESSING | 2000年 / 80卷 / 03期

基金：

芬兰科学院;

关键词：

frequency-warping; warped IIR filter; delay-free loop;

D O I：

10.1016/S0165-1684(99)00151-6

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Frequency-warped filters are beneficial in many audio applications because they inherently use nonuniform frequency resolution which may be matched so that it approximates the frequency representation of hearing. Warped transversal filters are immediately obtained by replacing the unit delays of a conventional filter with first-order allpass blocks. Implementation of warped recursive filters is a problem since those filters contain delay-free loops. A technique to implement any such filter without changing the coefficients or the structure of the filter is presented in this paper. In addition, a method to modify such a filter to a new structure where the delay-free loops are eliminated is introduced. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：543 / 548

页数：6

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