3 - Méthode de calcul approché très rapide de la transformée de Fourier

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URI: http://hdl.handle.net/2042/1657
Title: 3 - Méthode de calcul approché très rapide de la transformée de Fourier
Author: COHEN (J.); MAX (J.)
Abstract: Méthode de calcul approché de la Transformée de Fourier sous certaines conditions que nous précisions, le calcul des différentes composantes du spectre ne nécessite aucune multiplication. Le calcul ainsi simplifié peut s'effectuer en temps réel sur un micro-ordinateur non spécialisé
Description: We study an approximate calculus of the Fourier Transform . Subject to specified conditions, we define, the calculus of the différent components of the spectra does not require any multiplication . Thus, the calculus, can be done in real time on an ordinary micro-computer . Moreover, the calculus of the différent components of the spectra is done independently of one another . We are able to limit the calculus only to regions to which the user is interested in . The method is very flexible . We tested this method on a signal whose spectra is well known, and on a real speech signal. The precision is of a few percent if the signal is oversampled .
Subject: Transformation Fourier; Traitement signal; Approximation; Echantillonnage; Microordinateur; Méthode calcul
Publisher: GRETSI, Saint Martin d'Hères, France
Date: 1988

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