1. Video Communication and Applications Dept, Fraunhofer HHI, Berlin, Germany
2. Nantes Université, École Centrale Nantes, IUF, CNRS, LS2N, Nantes, France
3. CEA, List, Palaiseau, Université Paris-Saclay, Paris, France
4. Institute of Information Technology, Alpen-Adria-Universität, Klagenfurt, Austria