Title :
A modified time-frequency method for testing wide-sense stationarity
Author :
De Souza, Douglas Baptista ; Chanussot, Jocelyn ; Favre, Anne-Catherine ; Borgnat, Pierre
Author_Institution :
GIPSA-Lab., Domaine Univ., St. Martin d´´Hères, France
Abstract :
Recently, a time-frequency approach for testing stationarity was proposed. However, this method inefficiently detects nonstationarities of the first-order. Here, we present two contributions that improve the test performance and allow the detection of first-order evolutions. The first one is to use an adequate distance measure. The second is a modification of the method in order to consider the spectral content from the signal itself when computing the distances.
Keywords :
signal processing; time-frequency analysis; first-order evolutions; spectral signal content; time-frequency method; wide-sense stationarity testing; Distortion measurement; Indexes; Spectrogram; Testing; Time frequency analysis; Vectors; Distances; First-order stationarity; Marginals; 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.2012.6288648
