(19)

(11)

EP 1 636 932 A2

(12)

(88) Date of publication A3: 27.10.2005 (43) Date of publication: 22.03.2006 Bulletin 2006/12 (21) Application number: 04735781.9 (22) Date of filing: 02.06.2004

(51) International Patent Classification (IPC):  H04L 9/00(1968.09) (86) International application number: PCT/IB2004/050827 (87) International publication number: WO 2004/112307 (23.12.2004 Gazette 2004/52)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL HR LT LV MK (30) Priority: 13.06.2003 EP 03101735 (71) Applicant: Koninklijke Philips Electronics N.V. 5621 BA Eindhoven (NL)	(72) Inventor: EGNER, Sebastian NL-5656 AA Eindhoven (NL) (74) Representative: Engelfriet, Arnoud Peter  Philips Intellectual Property & Standards, Postbus 220 5600 AE Eindhoven 5600 AE Eindhoven (NL)