1. Department of Information Technology, IDLab, Ghent University–imec, Ghent, Belgium
2. Christian Doppler Laboratory ATHENA, Alpen-Adria-Universität Klagenfurt, Klagenfurt, Austria
3. Video Communication and Applications Department, Fraunhofer/HHI, Berlin, Germany
4. Center for Technology Experience, AIT Austrian Institute of Technology, Vienna, Austria