11 Avr 2013 adminFrumam – H. Omer (LATP) : Estimation of frequency modulations on wideband signals, applications to audio signal analysisCarte non disponible Date/heure Date(s) - 11/04/201314 h 00 min - 15 h 00 min Catégories Pas de Catégories Estimation of frequency modulations on wideband signals, applications to audio signal analysis By Harold Omer, LATP. Abstract: The problem of joint estimation of power spectrum and modulation from realizations of frequency modulated stationary wideband signals is considered. The study is motivated by some specific signal classes from which departures to stationarity can carry relevant information and has to be estimated. The estimation procedure is based upon explicit modeling of the signal as a wideband stationary Gaussian process, transformed by time-dependent, smooth frequency modulation. Under such assumptions, an approximate expression for the second order statistics of the transformed signal’s Gabor transform is obtained, which leads to an approximate maximum likelihood estimation procedure.