1. Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut, Image Processing Department, Einsteinufer 37, 10587 Berlin, Germany. merkle@hhi.de
2. Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut, Image Processing Department, Einsteinufer 37, 10587 Berlin, Germany. kmueller@hhi.de
3. Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut, Image Processing Department, Einsteinufer 37, 10587 Berlin, Germany. smolic@hhi.de
4. Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut, Image Processing Department, Einsteinufer 37, 10587 Berlin, Germany. wiegand@hhi.de