Title :
A method for parametrization of time-varying sounds
Author :
Härmä, Aki ; Juntunen, Marko
Author_Institution :
Lab. of Acoust. & Audio Signal Process., Helsinki Univ. of Technol., Espoo, Finland
fDate :
5/1/2002 12:00:00 AM
Abstract :
This paper presents a framework for parametrization, identification, and synthesis of brief time-varying sounds. The proposed scheme is based on a frequency-warped modification of Grenier´s (1983) time-varying lattice algorithm. A new algorithm, which gives the optimal time-varying model for an ensemble of similar sounds, is introduced.
Keywords :
FIR filters; IIR filters; audio signal processing; filtering theory; lattice filters; parameter estimation; signal synthesis; time-varying filters; transient analysis; frequency-warped FIR-type lattice filter; frequency-warped modification; frequency-warped signal processing; optimal time-varying model; parameter estimation; time-varying lattice algorithm; time-varying sounds identification; time-varying sounds parametrization; time-varying sounds synthesis; time-varying warped IIR-type lattice filter; transients; Acoustic noise; Delay estimation; Filtering; Filters; Frequency; Lattices; Reflection; Signal processing algorithms; Time varying systems; Vectors;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2002.1009006
