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Time-frequency modelling as a mixture of X2 distributions

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2 Author(s)
Hory, C. ; Lab. des Images et des Signaux, St. Martin d''Heres, France ; Martin, N.

This communication presents a new method for non-stationary signal interpretation, which consists of extracting and characterizing time-frequency structures. It is based on a modelling of a time-frequency representation probability density function as a mixture of central and noncentral chi-square distributions. The problem of interpretation is reduced to a problem of estimation and classification solved by a specific formulation of the EM algorithm for such mixture.

Published in:

Statistical Signal Processing, 2003 IEEE Workshop on

Date of Conference:

28 Sept.-1 Oct. 2003

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