musique contemporaine

Ircam - articles scientifiques notice originale

Frequency-­Slope­ Estimation­ and ­Its Application­ to­ Parameter ­Estimation ­for­ Non-Stationary­ Sinusoids

Type

text
 

Genre(s)

article
 

Forme(s)

document numérique
 

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

Identification

Titre

Frequency-­Slope­ Estimation­ and ­Its Application­ to­ Parameter ­Estimation ­for­ Non-Stationary­ Sinusoids
 

Nom(s)

Roebel, Axel (auteur)
 

Publication

2008
 

Description

Sujet(s)

sinusoidal parameter estimation   non-stationary sinusoids   frequency domain demodulation
 

Résumé

In this article we investigate into the estimation of sinusoidal parameters for sinusoids with linear AM/FM modulation. It will be shown that for linear amplitude and frequency modulation only the frequency modulation creates additional estimation bias for the standard sinusoidal parameter estimator. Then an enhanced algorithm for frequency domain demodulation of spectral peaks is proposed that can be used to obtain an approximate maximum likelihood estimate of the frequency slope, and an estimate of the amplitude, phase and frequency parameter with significantly reduced bias. An experimental evaluation compares the new estimation scheme with previously existing methods. It shows that significant bias reduction is achieved for a large range of slopes and zero padding factors. A real world example demonstrates that the enhanced bias reduction algorithm can achieve a reduction of the residual energy of up to 9dB.
 

Note(s)

Article paru dans : Computer Music Journal vol. 32 n°2
 

Localisation

Envoyer la notice

Bookmark and Share 
 

Identifiant OAI

 

Date de la notice

2011-02-05 01:00:00
 

Identifiant portail

 

Contact