8th European Conference on Speech Communication and Technology

Geneva, Switzerland
September 1-4, 2003


Local Regularity Analysis at Glottal Opening and Closure Instants in Electroglottogram Signal Using Wavelet Transform Modulus Maxima

Aicha Bouzid (1), Noureddine Ellouze (2)

(1) Superior Institute of Technological Studies of Sfax, Tunisia
(2) National school of engineers of Tunis, Tunisia

This paper deals with singularities characterisation and detection in Electroglottogram (EGG) signal using wavelet transform modulus maxima. These singularities correspond to glottal opening and closure instants (GOIs and GCIs). Wavelets with one and two vanishing moments are applied to EGG signal. We show that wavelet with one vanishing moment is sufficient to detect singularities of EGG signal and to measure their regularities.

The Lipschitz regularity at any point is the maxima slope of log_2 of wavelet transform modulus maxima as a function of log_2 s along the maxima lines converging to this point. Local regularity measures allow us to conclude that EGG signal is more regular at glottal opening instant than at glottal closure instant.

Full Paper

Bibliographic reference.  Bouzid, Aicha / Ellouze, Noureddine (2003): "Local regularity analysis at glottal opening and closure instants in electroglottogram signal using wavelet transform modulus maxima", In EUROSPEECH-2003, 2837-2840.