Parametrically Tunable Audio Shelving and Equalizing Ladder Wave Digital Filters

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Parametrically tunable audio equalizers are conventionally realized using allpass digital filter networks. They consist of first-order shelving filters and second-order equalizing filters. In this paper, ladder wave digital filters (WDFs) with parametrically tunable coefficients are proposed as shelving and equalizing filters. Similar to the allpass realization, the transfer function power complementary property of WDFs is used to obtain efficient shelving and equalizing filters. However, unlike the allpass structures, the transfer function and the tunable parameters of the ladder WDF are derived from the analog filter equivalent of the digital shelving and equalizing filters. For the shelving WDF, the cut-off frequency and gain are tunable, while for the equalizing WDF, the tunable parameters are the center frequency, 3-dB bandwidth and gain. The transfer functions are derived and shown in terms of the tunable coefficients for both the shelving and equalizing WDFs.

Original languageEnglish
Pages (from-to)181-198
Number of pages18
JournalTurkish Journal of Electrical Engineering and Computer Sciences
Volume11
Issue number3
Publication statusPublished - 2003

Fingerprint

Ladders
Digital filters
Wave filters
Transfer functions
Cutoff frequency
Equalizers
Bandwidth

Keywords

  • Audio shelving filters
  • Equalizing filters
  • Tunable parameters
  • Wave digital filters

ASJC Scopus subject areas

  • Computer Science(all)
  • Engineering(all)

Cite this

@article{21cc8e2208cc4ea3a397a2b9097ffb4f,
title = "Parametrically Tunable Audio Shelving and Equalizing Ladder Wave Digital Filters",
abstract = "Parametrically tunable audio equalizers are conventionally realized using allpass digital filter networks. They consist of first-order shelving filters and second-order equalizing filters. In this paper, ladder wave digital filters (WDFs) with parametrically tunable coefficients are proposed as shelving and equalizing filters. Similar to the allpass realization, the transfer function power complementary property of WDFs is used to obtain efficient shelving and equalizing filters. However, unlike the allpass structures, the transfer function and the tunable parameters of the ladder WDF are derived from the analog filter equivalent of the digital shelving and equalizing filters. For the shelving WDF, the cut-off frequency and gain are tunable, while for the equalizing WDF, the tunable parameters are the center frequency, 3-dB bandwidth and gain. The transfer functions are derived and shown in terms of the tunable coefficients for both the shelving and equalizing WDFs.",
keywords = "Audio shelving filters, Equalizing filters, Tunable parameters, Wave digital filters",
author = "{Abdul Samad}, Salina",
year = "2003",
language = "English",
volume = "11",
pages = "181--198",
journal = "Turkish Journal of Electrical Engineering and Computer Sciences",
issn = "1300-0632",
publisher = "Turkiye Klinikleri",
number = "3",

}

TY - JOUR

T1 - Parametrically Tunable Audio Shelving and Equalizing Ladder Wave Digital Filters

AU - Abdul Samad, Salina

PY - 2003

Y1 - 2003

N2 - Parametrically tunable audio equalizers are conventionally realized using allpass digital filter networks. They consist of first-order shelving filters and second-order equalizing filters. In this paper, ladder wave digital filters (WDFs) with parametrically tunable coefficients are proposed as shelving and equalizing filters. Similar to the allpass realization, the transfer function power complementary property of WDFs is used to obtain efficient shelving and equalizing filters. However, unlike the allpass structures, the transfer function and the tunable parameters of the ladder WDF are derived from the analog filter equivalent of the digital shelving and equalizing filters. For the shelving WDF, the cut-off frequency and gain are tunable, while for the equalizing WDF, the tunable parameters are the center frequency, 3-dB bandwidth and gain. The transfer functions are derived and shown in terms of the tunable coefficients for both the shelving and equalizing WDFs.

AB - Parametrically tunable audio equalizers are conventionally realized using allpass digital filter networks. They consist of first-order shelving filters and second-order equalizing filters. In this paper, ladder wave digital filters (WDFs) with parametrically tunable coefficients are proposed as shelving and equalizing filters. Similar to the allpass realization, the transfer function power complementary property of WDFs is used to obtain efficient shelving and equalizing filters. However, unlike the allpass structures, the transfer function and the tunable parameters of the ladder WDF are derived from the analog filter equivalent of the digital shelving and equalizing filters. For the shelving WDF, the cut-off frequency and gain are tunable, while for the equalizing WDF, the tunable parameters are the center frequency, 3-dB bandwidth and gain. The transfer functions are derived and shown in terms of the tunable coefficients for both the shelving and equalizing WDFs.

KW - Audio shelving filters

KW - Equalizing filters

KW - Tunable parameters

KW - Wave digital filters

UR - http://www.scopus.com/inward/record.url?scp=0346778584&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0346778584&partnerID=8YFLogxK

M3 - Article

VL - 11

SP - 181

EP - 198

JO - Turkish Journal of Electrical Engineering and Computer Sciences

JF - Turkish Journal of Electrical Engineering and Computer Sciences

SN - 1300-0632

IS - 3

ER -