A Pitch-Synchronous Extension of Fractal Additive Synthesis via Time-Varying Cosine Modulated Filter Banks

Author

Polotti, Pietro

Author_Institution

Vision, Image Process., & Sound Lab., Univ. of Verona, Verona

Volume

15

fYear

2008

fDate

6/30/1905 12:00:00 AM

Firstpage

433

Lastpage

436

Abstract

Fractal additive synthesis (FAS) is a method for the synthesis-by-analysis of voiced-sounds. FAS is based on a harmonic version of the wavelet transform (WT), and it allows to define two different parametric models for the deterministic and the stochastic components of sounds, respectively. In this letter, we introduce a pitch-synchronous (PS) extension of FAS. By adapting an already existing method for the design of time-varying cosine modulated filter banks (TV-CMFB), we are now able to deal with a much wider class of voiced-sounds, i.e., any voiced-sound showing a variable pitch as in the case, for example, of glissando or vibrato effects.

Keywords

acoustic signal processing; channel bank filters; harmonic analysis; modulation; signal synthesis; stochastic processes; synchronisation; time-varying filters; wavelet transforms; fractal additive synthesis; pitch-synchronous extension; stochastic component; time-varying cosine modulated filter bank; voiced-sound synthesis-by-analysis method; wavelet transform; Acoustic noise; Birth disorders; Filter bank; Fractals; Parametric statistics; Power harmonic filters; Stochastic processes; TV; Wavelet analysis; Wavelet transforms; Data compression; sound synthesis; spectral modeling; structured audio; time-varying cosine modulated filter banks (TV-CMFB); wavelets;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2008.923792

Filename

4512092