musique contemporaine

Ircam - articles scientifiques notice originale

Analytical Approximations of Fractional Delays : Lagrange Interpolators and Allpass Filters

Type

text
 

Genre(s)

article
 

Forme(s)

document imprimé
 

Cette ressource est disponible chez l'organisme suivant : Ircam - Centre Pompidou

Identification

Titre

Analytical Approximations of Fractional Delays
 

Sous-Titre

Lagrange Interpolators and Allpass Filters
 

Nom(s)

Tassart, Stéphan (auteur)
 

Publication

Munich, Allemagne , 1997
 

Description

Sujet(s)

analyse et synthèse sonores   LIF (Lagrange Interpolator Filters)   Thiran Allpass Filters   ideal fractional delay   sound synthesis   physical models (computer simulations)
 

Résumé

We propose in this paper a new point of view which unifies two well known filter families for approximating ideal fractional delay filters: Lagrange Interpolator Filters (LIF) and Thiran Allpass Filters. We achieve this unification by approximating the ideal Fourier transform of the fractional delay according to two different Padé approximations: series expansions and continued fraction expansions, and by proving that both approximations correspond exactly either to the LIF family or to the allpass delay filters family. This leads to an efficient modular implementation of LIFs.
 

Note(s)

Contribution au colloque ou congrès : ICASSP International Conference on Acoustics Speech and Signal Processing
 

Localisation

Envoyer la notice

Bookmark and Share 
 

Identifiant OAI

 

Date de la notice

2006-03-14 01:00:00
 

Identifiant portail

 

Contact