Antiderivative antialiasing, Lagrange interpolation and spectral flatness

Stefan Bilbao, Fabian Esqueda Flores, Vesa Välimäki

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

3 Citations (Scopus)
137 Downloads (Pure)

Abstract

Aliasing is major problem in any audio signal processing chain involving nonlinearity. The usual approach to antialiasing involves operation at an oversampled rate-usually 4 to 8 times an audio sample rate. Recently, a new approach to antialiasing in the case of memoryless nonlinearities has been proposed, which relies on operations over the antiderivative of the nonlinear function, and which allows for antialiasing at audio or near-audio rates, and without regard to the particular form of the nonlinearity (i.e., polynomial, or hard clipping). Such techniques may be deduced through an application of Lagrange interpolation over unequally-spaced values, and, furthermore, may be constrained to behave as spectrally transparent “throughs” for nonlinearities which reduce to linear at low signal amplitudes. Numerical results are presented.
Original languageEnglish
Title of host publicationProceedings of the 2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA)
Place of PublicationNew Paltz, NY, USA
PublisherIEEE
Pages141-145
ISBN (Electronic)978-1-5386-1632-1
DOIs
Publication statusPublished - 15 Oct 2017
MoE publication typeA4 Article in a conference publication
EventIEEE Workshop on Applications of Signal Processing to Audio and Acoustics - New Paltz, NY, USA, New Paltz, United States
Duration: 15 Oct 201718 Oct 2017
http://www.waspaa.com/

Publication series

NameIEEE Workshop on Applications of Signal Processing to Audio and Acoustics
ISSN (Electronic)1947-1629

Workshop

WorkshopIEEE Workshop on Applications of Signal Processing to Audio and Acoustics
Abbreviated titleWASPAA
CountryUnited States
CityNew Paltz
Period15/10/201718/10/2017
Internet address

Keywords

  • Acoustic signal processing
  • interpolation
  • Aliasing

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