(19)

(11)

EP 1 203 479 A2

(12)

(88) Date of publication A3: 06.12.2001 (43) Date of publication: 08.05.2002 Bulletin 2002/19 (21) Application number: 00952730.0 (22) Date of filing: 11.08.2000

(51) International Patent Classification (IPC)7: H04L 29/06, G06F 1/00 (86) International application number: PCT/US0021/965 (87) International publication number: WO 0113/201 (22.02.2001 Gazette 2001/08)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 12.08.1999 US 148624 P 04.08.2000 US  (71) Applicant: Sarnoff Corporation Princeton, NJ 08543-5300 (US)	(72) Inventor: WALDMAN, Harvey Yardley, PA 19067 (US) (74) Representative: Pratt, Richard Wilson  D. Young & Co,21 New Fetter Lane London EC4A 1DA London EC4A 1DA (GB)