Marc Al-Hames Benedikt Hörnler Christoph Scheuermann Gerhard Rigoll Using Audio, Visual, and Lexical Features in a Multi-modal Virtual Meeting Director. 63-74 2006 conf/mlmi/2006 MLMI http://dx.doi.org/10.1007/11965152_6 db/conf/mlmi/mlmi2006.html#Al-HamesHSR06