(19)
(11) EP 1 277 295 A1

(12)

(43) Date of publication:
22.01.2003 Bulletin 2003/04

(21) Application number: 00907291.9

(22) Date of filing: 14.02.2000
(51) International Patent Classification (IPC)7: H04H 1/00, H04H 9/00
(86) International application number:
PCT/US0003/829
(87) International publication number:
WO 0103/1816 (03.05.2001 Gazette 2001/18)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 27.10.1999 US 428425

(71) Applicant: Nielsen Media Research, Inc.
Schaumburg, IL 60173-2076 (US)

(72) Inventor:
  • SRINIVASAN, Venugopal
    Palm Harbor, FL 34683 (US)

(74) Representative: Körber, Martin, Dipl.-Phys. 
Mitscherlich & PartnerPatentanwälteSonnenstrasse 33
80331 München
80331 München (DE)

   


(54) SYSTEM AND METHOD FOR ENCODING AN AUDIO SIGNAL FOR USE IN BROADCAST PROGRAM IDENTIFICATION SYSTEMS, BY ADDING INAUDIBLE CODES TO THE AUDIO SIGNAL