Optimized Polynomial Spline Basis Function Design for Quasi-Bandlimited Classical Waveform Synthesis

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Classical geometric waveforms used in virtual analog synthesis suffer from aliasing distortion when simple sampling is used. An efficient antialiasing technique is based on expressing the waveforms as a filtered sum of time-shifted approximately bandlimited polynomial-spline basis functions. It is shown that by optimizing the coefficients of the basis function so that the aliasing distortion is perceptually minimized, the alias-free bandwidth of classical waveforms can be expanded. With the best of the case examples given here, the generated impulse-train and sawtooth waveform are alias-free up to fundamental frequencies over 10 kHz when the sampling rate is 44.1 kHz.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2012-03
Language
English
Article Type
Article
Citation

IEEE SIGNAL PROCESSING LETTERS, v.19, no.3, pp.159 - 162

ISSN
1070-9908
DOI
10.1109/LSP.2012.2183123
URI
http://hdl.handle.net/10203/201094
Appears in Collection
GCT-Journal Papers(저널논문)
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