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Dans 2012 IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings - 2012 IEEE International Conference on Acoustics, Speech and Signal Processing, Kyoto : Japon
ensl-00654808, version 1
Informatique/Traitement du signal et de l'image
Sciences de l'ingénieur/Traitement du signal et de l'image
Making Reassignment Adjustable: the Levenberg-Marquardt Approach
François Auger1, E. Chassande-Mottin2, Patrick Flandrin3
1 :  IREENA - Institut de Recherche en Electrotechnique et Electronique de Nantes Atlantique
2 :  APC - UMR 7164 - AstroParticule et Cosmologie
3 :  Phys-ENS - Laboratoire de Physique de l'ENS Lyon
APC - ADAMIS
This paper presents a new time-frequency reassignment process of the spectrogram, called the Levenberg-Marquardt reassignment. Compared to the classical one, this new reassignment process uses the second-order derivatives of the phase of the short-time Fourier transform, and provides the user with a setting parameter. This parameter allows him to produce either a weaker or a stronger localization of the signal components in the time-frequency plane.
Anglais
time-frequency – reassignment – Levenberg-Marquardt
accepted for publication, to appear in Proc. of IEEE Int. Conf. on Acoust., Speech and Signal Proc. ICASSP-12, Kyoto (Japan), March 25-30, 2012.
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