Making Reassignment Adjustable: the Levenberg-Marquardt ApproachReport as inadecuate

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1 IREENA - Institut de Recherche en Electrotechnique et Electronique de Nantes Atlantique 2 APC-Gravitation - APC - Gravitation APC - UMR 7164 - AstroParticule et Cosmologie, Max-Planck-Institut für Gravitationsphysik Albert-Einstein-Institut 3 Phys-ENS - Laboratoire de Physique de l-ENS Lyon

Abstract : 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.

Keywords : time-frequency reassignment Levenberg-Marquardt

Author: François Auger - E. Chassande-Mottin - Patrick Flandrin -



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