Interpolation Filter Design for Hearing-Aid Audio Class-D Output Stage Application

Peter  Pracný; Erik Bruun; Pere Llimos Muntal

doi:10.1109/ICECS.2012.6463726

Interpolation Filter Design for Hearing-Aid Audio Class-D Output Stage Application

Peter Pracný, Erik Bruun, Pere Llimos Muntal

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

This paper deals with a design of a digital interpolation filter for a 3rd order multi-bit ΣΔ modulator with over-sampling ratio OSR = 64. The interpolation filter and the ΣΔ modulator are part of the back-end of an audio signal processing system in a hearing-aid application. The aim in this paper is to compare this design to designs presented in other state-of-the-art works ranging from hi-fi audio to hearing-aids. By performing comparison, trends and tradeoffs in interpolation filter design are indentified and hearing-aid specifications are derived. The possibilities for hardware reduction in the interpolation filter are investigated. Proposed design simplifications presented here result in the least hardware demanding combination of oversampling ratio, number of stages and number of filter taps
among a number of filters reported for audio applications.

Original language	English
Title of host publication	Proceedings of the 2012 19th IEEE International Conference on Electronics, Circuits and Systems (ICECS 2012)
Publisher	IEEE
Publication date	2012
Pages	364-367
DOIs	https://doi.org/10.1109/ICECS.2012.6463726
Publication status	Published - 2012
Event	2012 IEEE 19th International Conference on Electronics, Circuits and Systems - Barcelo Renacimiento Hotel Seville, Seville, Spain Duration: 9 Dec 2012 → 12 Dec 2012 Conference number: 19 https://ieeexplore.ieee.org/xpl/conhome/6450169/proceeding

Conference

Conference	2012 IEEE 19th International Conference on Electronics, Circuits and Systems
Number	19
Location	Barcelo Renacimiento Hotel Seville
Country/Territory	Spain
City	Seville
Period	09/12/2012 → 12/12/2012
Internet address	https://ieeexplore.ieee.org/xpl/conhome/6450169/proceeding

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10.1109/ICECS.2012.6463726

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title = "Interpolation Filter Design for Hearing-Aid Audio Class-D Output Stage Application",

abstract = "This paper deals with a design of a digital interpolation filter for a 3rd order multi-bit ΣΔ modulator with over-sampling ratio OSR = 64. The interpolation filter and the ΣΔ modulator are part of the back-end of an audio signal processing system in a hearing-aid application. The aim in this paper is to compare this design to designs presented in other state-of-the-art works ranging from hi-fi audio to hearing-aids. By performing comparison, trends and tradeoffs in interpolation filter design are indentified and hearing-aid specifications are derived. The possibilities for hardware reduction in the interpolation filter are investigated. Proposed design simplifications presented here result in the least hardware demanding combination of oversampling ratio, number of stages and number of filter tapsamong a number of filters reported for audio applications.",

author = "Peter Pracn{\'y} and Erik Bruun and {Llimos Muntal}, Pere",

year = "2012",

doi = "10.1109/ICECS.2012.6463726",

language = "English",

pages = "364--367",

booktitle = "Proceedings of the 2012 19th IEEE International Conference on Electronics, Circuits and Systems (ICECS 2012)",

publisher = "IEEE",

address = "United States",

note = "2012 IEEE 19th International Conference on Electronics, Circuits and Systems, ICECS 2012 ; Conference date: 09-12-2012 Through 12-12-2012",

url = "https://ieeexplore.ieee.org/xpl/conhome/6450169/proceeding",

}

Pracný, P, Bruun, E & Llimos Muntal, P 2012, Interpolation Filter Design for Hearing-Aid Audio Class-D Output Stage Application. in Proceedings of the 2012 19th IEEE International Conference on Electronics, Circuits and Systems (ICECS 2012). IEEE, pp. 364-367, 2012 IEEE 19th International Conference on Electronics, Circuits and Systems, Seville, Spain, 09/12/2012. https://doi.org/10.1109/ICECS.2012.6463726

Interpolation Filter Design for Hearing-Aid Audio Class-D Output Stage Application. / Pracný, Peter ; Bruun, Erik; Llimos Muntal, Pere.
Proceedings of the 2012 19th IEEE International Conference on Electronics, Circuits and Systems (ICECS 2012). IEEE, 2012. p. 364-367.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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Interpolation Filter Design for Hearing-Aid Audio Class-D Output Stage Application

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