Combinaison d'approches pour la reconnaissance du rôle des locuteurs (Combination of approaches for speaker role recognition) [in French]

Combination of approaches for speaker role recognition In this article, we are particularly interested in recognizing speaker role inside broadcast news shows. Previous studies highlighted a link between speech spontaneity and speaker roles. An automatic spontaneous speech detection system has already been applied to recognize speaker roles, without any change in the method process (Dufour et al., 2011). We propose to improve this method by adding specific speaker role features. Thus, features from Social Network Analysis (SNA) are used in the method. This new information allowed to improve the two decision steps oh the method, with a gain of 3.2 and 1.9 points in absolute, respectively for the local then the global decision. Finally for a larger number of focused roles than usually retained, the proposed method allowed to associate the correct role to 76.3% of the speakers. MOTS-CLÉS : indexation automatique, analyse des réseaux sociaux, parole spontanée, rôle du locuteur.