1. Fraunhofer Institute for Telecommunications - Heinrich Hertz Institute, Image Processing Department, Einsteinufer 37, 10587 Berlin, Germany. hschwarz@hhi.fraunhofer.de
2. Fraunhofer Institute for Telecommunications - Heinrich Hertz Institute, Image Processing Department, Einsteinufer 37, 10587 Berlin, Germany. marpe@hhi.fraunhofer.de
3. Fraunhofer Institute for Telecommunications - Heinrich Hertz Institute, Image Processing Department, Einsteinufer 37, 10587 Berlin, Germany. wiegand@hhi.fraunhofer.de