METHOD FOR GENERATING AND VERIFYING DEGITAL WATERMARKS AND FOR EXCHANGING DATA CONTAINING DIGITAL WATERMARKS - Patent 1013073

(19)

(11)

EP 1 013 073 A1

(12)

(43)	Date of publication:
	28.06.2000 Bulletin 2000/26

(21)	Application number: 98947703.9

(22)	Date of filing: 28.09.1998

(51)	International Patent Classification (IPC)⁷: H04N 1/32, H04N 7/26

(86)	International application number:
	PCT/IB9801/500

(87)	International publication number:
	WO 9917/536 (08.04.1999 Gazette 1999/14)

(84)	Designated Contracting States:
	AT BE CH DE ES FR GB GR IE IT LI NL SE

(30)

Priority:

26.09.1997 EP 97810708

(71)	Applicant: Digital Copyright Technologies AG
	8004 Zürich (CH)

(72)	Inventors:
	HERRIGEL, Alexander CH-8702 Meilen (CH) O'RUANAIDH, Joseph J. K. CH-1227 Carouge (CH) PUN, Thierry CH-1224 Chêne-Bougeries (CH)

(74)	Representative: Blum, Rudolf Emil Ernst et al
	c/o E. Blum & CoPatentanwälteVorderberg 11 8044 Zürich 8044 Zürich (CH)

(54)	METHOD FOR GENERATING AND VERIFYING DEGITAL WATERMARKS AND FOR EXCHANGING DATA CONTAINING DIGITAL WATERMARKS