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EP 1 757 060 A1

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(43) Date of publication: 28.02.2007 Bulletin 2007/09 (21) Application number: 05740457.6 (22) Date of filing: 23.05.2005

(51) International Patent Classification (IPC):  H04L 29/06(2006.01) (86) International application number: PCT/IB2005/051670 (87) International publication number: WO 2005/117389 (08.12.2005 Gazette 2005/49)

(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: 24.05.2004 GB 0411528 (71) Applicant: Koninklijke Philips Electronics N.V. 5621 BA Eindhoven (NL)

(72) Inventors: ADAMSON, Anthony c/o Philips Intellectual Redhill Surrey RH1 5HA (GB) HOSKINS, Douglas, R. c/o Philips Intellectual Redhill Surrey RH1 5HA (GB) BLACKWELL, Robin, J. c/o Philips Intellectual Redhill Surrey RH1 5HA (GB) RUDLAND, Philip, A. c/o Philips Intellectual Redhill Surrey RH1 5HA (GB) (74) Representative: Groenendaal, Antonius W. M.  Philips Intellectual Property & Standards P.O. Box 220 5600 AE Eindhoven 5600 AE Eindhoven (NL)