(19)
(11) EP 1 483 900 A1

(12)

(43) Date of publication:
08.12.2004 Bulletin 2004/50

(21) Application number: 01977158.3

(22) Date of filing: 25.09.2001
(51) International Patent Classification (IPC)7H04N 5/00, H04N 7/16
(86) International application number:
PCT/US2001/029818
(87) International publication number:
WO 2003/043310 (22.05.2003 Gazette 2003/21)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(71) Applicant: Thomson Licensing S.A.
92648 Boulogne Cedex (FR)

(72) Inventors:
  • ESKICIOGLU, Ahmet, Mursit
    Indianapolis, IN 46250-4607 (US)
  • DUFFIELD, David, Jay
    Indianapolis, IN 46220 (US)
  • BEYERS, Billy, Wesley, Jr.
    Carmel, IN 46033-9046 (US)
  • DEISS, Michael, Scott
    Zionsville, IN 46077 (US)
  • VIRAG, David, Emery
    Indianapolis, IN 46254-9769 (US)

(74) Representative: Kohrs, Martin 
Thomson multimedia46, quai A. Le Gallo
92648 Boulogne-Billancourt Cedex
92648 Boulogne-Billancourt Cedex (FR)

   


(54) CA SYSTEM FOR BROADCAST DTV USING MULTIPLE KEYS FOR DIFFERENT SERVICE PROVIDERS AND SERVICE AREAS