(19)

(11)

EP 1 730 892 A1

(12)

(43) Date of publication: 13.12.2006 Bulletin 2006/50 (21) Application number: 05709080.5 (22) Date of filing: 23.03.2005

(51) International Patent Classification (IPC):  H04L 12/28(2006.01) (86) International application number: PCT/IB2005/051005 (87) International publication number: WO 2005/094008 (06.10.2005 Gazette 2005/40)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR (30) Priority: 24.03.2004 US 556354 P (71) Applicant: Koninklijke Philips Electronics N.V. 5621 BA Eindhoven (NL)	(72) Inventor: CHIU, Tom San Jose, California 95131-1706 (US) (74) Representative: Groenendaal, Antonius W. M.  Philips Intellectual Property & Standards P.O. Box 220 5600 AE Eindhoven 5600 AE Eindhoven (NL)