Strategies for multiple feature fusion with Hierarchical HMM: Application to activity recognition from wearable audiovisual sensors. - Julien Pinquier; Svebor Karaman; Laetitia Letoupin; Patrice Guyot; Rémi Mégret; Jenny Benois-Pineau; Yann Gaëstel; Jean-François Dartigues (ICPR, 2012)