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1. (WO2002009017) MULTI-CARRIER WATERMARKS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2002/009017    International Application No.:    PCT/US2001/021815
Publication Date: 31.01.2002 International Filing Date: 10.07.2001
Chapter 2 Demand Filed:    14.02.2002    
IPC:
G06T 1/00 (2006.01)
Applicants: DIGIMARC CORPORATION [US/US]; 19801 SW 72nd Avenue Suite 100 Tualatin, OR 97062 (US) (For All Designated States Except US).
GUSTAFSON, Ammon, E. [US/US]; (US) (For US Only)
Inventors: GUSTAFSON, Ammon, E.; (US)
Agent: MEYER, Joel, R.; Digimarc Corporation Suite 100 19801 SW 72nd Avenue Tualatin, OR 97062 (US)
Priority Data:
09/619,266 19.07.2000 US
Title (EN) MULTI-CARRIER WATERMARKS
(FR) FILIGRANES SUR PORTEUSES MULTIPLES
Abstract: front page image
(EN)A watermark embedder encodes auxiliary information, such as binary message, into a host media signal (106) by modulating message signals (100) with two or more corresponding carrier signals (104) to form a watermark signal and embeds this signal into the host (108). A compatible watermark decoder uses the carrier signals to demodulate the message signals from the watermarked signal.
(FR)L'invention porte sur un incorporateur de filigranes codant des informations auxiliaires telles que des messages binaires dans le signal d'un support hôte en modulant les signaux des messages à l'aide d'au moins deux signaux de porteuses correspondants pour former un signal filigrané qui s'incorporera à l'hôte, et sur un décodeur compatible de filigranes utilisant les signaux des porteuses pour démoduler les signaux des messages du signal filigrané.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)