Title :
Making reassignment adjustable: The Levenberg-Marquardt approach
Author :
Auger, F. ; Chassande-Mottin, E. ; Flandrin, P.
Author_Institution :
IREENA, LUNAM Univ., St. Nazaire, France
Abstract :
This paper presents a new time-frequency reassignment process for 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 :
Fourier transforms; signal representation; time-frequency analysis; Levenberg-Marquardt reassignment approach; parameter setting; second-order derivative; short-time Fourier transform; signal component; signal representation; spectrogram; time-frequency reassignment processing; Algorithm design and analysis; Chirp; Closed-form solutions; Fourier transforms; Reliability; Spectrogram; Time frequency analysis; nonstationary signals; reassignment; spectrogram; time-frequency analysis;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2012 IEEE International Conference on
Conference_Location :
Kyoto
Print_ISBN :
978-1-4673-0045-2
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2012.6288767