(19)

(11)

EP 1 161 838 A1

(12)

(43) Date of publication: 12.12.2001 Bulletin 2001/50 (21) Application number: 00921403.2 (22) Date of filing: 17.03.2000

(51) International Patent Classification (IPC)7: H04N 7/24, H04N 7/62 (86) International application number: PCT/US0007/208 (87) International publication number: WO 0057/647 (28.09.2000 Gazette 2000/39)

(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: 22.03.1999 US 273439 (71) Applicant: Scientific-Atlanta, Inc. Lawrenceville, GA 30044 (US)	(72) Inventors: HUANG, Si, Jun Suwanee, GA 30024 (US) SCHOENBLUM, Joel Roswell, GA 30076 (US) (74) Representative: Kügele, Bernhard et al NOVAPAT INTERNATIONAL SA,9, Rue du Valais 1202 Genève 1202 Genève (CH)