1. Center for Information and Neural Networks (CiNet), National Institute of Information and Communications Technology (NICT), Osaka University; Osaka Japan
2. Institut Supérieur de l'Aéronautique et de l'Espace (ISAE), Université Fédérale Toulouse Midi-Pyrénées; Toulouse France
3. School of Information Technology and Electrical Engineering; The University of Queensland; Brisbane Australia
4. Multisensory Cognition and Computation Laboratory; Universal Communication Research Institute, National Institute of Information and Communications Technology; Kyoto Japan