Improved Multi-***scale Product Method for Glottal Opening Instants From Speech Signal

In this paper, we improve the glottal opening instant (GOI) detection from speech signal by a new approach based on Multi-***scale Product Method (MPM). We compute wavelet transform coefficients products at three scales using the quadratic spline wavelet. Glottal closure and opening instants appear respectively as strong maximum and weak minimum on the product signal. The GOI localisation is enhanced by refining the time interval containing this instant and based on the open quotient value. The proposed method is applied and evaluated on the Keele University database. Evaluation results show that the MPM detects GOIs with a performance rate equals to 96% for the entire database.