[1] Philips Res Labs, Digital Signal Proc Grp, NL-5656 AA Eindhoven, Netherlands
[2] Univ Erlangen Nurnberg, Multimedia Commun & Signal Proc, D-91058 Erlangen, Germany
[3] Katholieke Univ Leuven, Dept Elect Engn, B-3001 Heverlee, Belgium
[4] Eindhoven Univ Technol, Fac Elect Engn, NL-5600 MB Eindhoven, Netherlands