Resolving delay-free loops in recursive filters using the modified Härmä method

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Resolving delay-free loops in recursive filter structures has been a longstanding problem approached in several different ways including signal flow graph manipulation [1], [2] and more recently with Zavalishin's instantaneous response technique [3],[4]. Härmä demonstrates a method for resolving delay-less loops in recursive filter structures [5] but the technique is limited to a specific generic loop topology in which the feedforward branch does not implement signal processing; all processing is implemented in one or more delay-less feedback loops. We modify Härmä's method to accommodate filter processing in the feedforward branch and provide a step-by-step method to resolve delay-less loops in recursive filter structures. We conclude with examples including a new method of synthesizing fourth order filters.

Original languageEnglish (US)
Title of host publication137th Audio Engineering Society Convention 2014
PublisherAudio Engineering Society
Pages720-729
Number of pages10
ISBN (Print)9781634397483
StatePublished - 2014
Event137th Audio Engineering Society Convention 2014 - Los Angeles, United States
Duration: Oct 9 2014Oct 12 2014

Other

Other137th Audio Engineering Society Convention 2014
CountryUnited States
CityLos Angeles
Period10/9/1410/12/14

Fingerprint

IIR filters
Signal flow graphs
Filter
Processing
Signal processing
Feedforward
Topology
Feedback
Branch
signal flow graphs
filters
Flow Graphs
Feedback Loop
Instantaneous
Fourth Order
Signal Processing
Manipulation
manipulators
signal processing
Resolve

ASJC Scopus subject areas

  • Modeling and Simulation
  • Acoustics and Ultrasonics

Cite this

Pirkle, W. (2014). Resolving delay-free loops in recursive filters using the modified Härmä method. In 137th Audio Engineering Society Convention 2014 (pp. 720-729). Audio Engineering Society.

Resolving delay-free loops in recursive filters using the modified Härmä method. / Pirkle, Will.

137th Audio Engineering Society Convention 2014. Audio Engineering Society, 2014. p. 720-729.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Pirkle, W 2014, Resolving delay-free loops in recursive filters using the modified Härmä method. in 137th Audio Engineering Society Convention 2014. Audio Engineering Society, pp. 720-729, 137th Audio Engineering Society Convention 2014, Los Angeles, United States, 10/9/14.
Pirkle W. Resolving delay-free loops in recursive filters using the modified Härmä method. In 137th Audio Engineering Society Convention 2014. Audio Engineering Society. 2014. p. 720-729
Pirkle, Will. / Resolving delay-free loops in recursive filters using the modified Härmä method. 137th Audio Engineering Society Convention 2014. Audio Engineering Society, 2014. pp. 720-729
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