Perceptually alias-free waveform generation using the bandlimited step method and genetic algorithm

Francisco Valencia, Samarth Behura, Will Pirkle

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

Abstract

Quasi-Bandlimited waveforms may be synthesized by smoothing the discontinuities of trivial waveforms using the Bandlimited Step Method (BLEP) that produces excellent results with low computational overhead [1]. The correction scheme first starts with a sinc function -The impulse response of a low-pass filter -And uses it to generate offset values that are applied to the points around the discontinuity. Windowing the sinc function prior to use is found to reduce aliasing at the expense of the harmonic envelope, whose shape is no longer ideal. In this paper we explore two methods for generating the initial sinc function in an effort to achieve a perceptually aliasfree waveform. Both approaches involve using the Genetic Algorithm as a search method.

Original languageEnglish (US)
Title of host publication141st Audio Engineering Society International Convention 2016, AES 2016
PublisherAudio Engineering Society
StatePublished - 2016
Event141st Audio Engineering Society International Convention 2016, AES 2016 - Los Angeles, United States
Duration: Sep 29 2016Oct 2 2016

Other

Other141st Audio Engineering Society International Convention 2016, AES 2016
CountryUnited States
CityLos Angeles
Period9/29/1610/2/16

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Modeling and Simulation
  • Acoustics and Ultrasonics

Cite this

Valencia, F., Behura, S., & Pirkle, W. (2016). Perceptually alias-free waveform generation using the bandlimited step method and genetic algorithm. In 141st Audio Engineering Society International Convention 2016, AES 2016 Audio Engineering Society.