(19)
(11) EP 1 112 636 A1

(12)

(43) Date of publication:
04.07.2001 Bulletin 2001/27

(21) Application number: 99969197.5

(22) Date of filing: 10.09.1999
(51) International Patent Classification (IPC)7: H04L 9/00
(86) International application number:
PCT/US9920/649
(87) International publication number:
WO 0016/516 (23.03.2000 Gazette 2000/12)
(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: 10.09.1998 KR 3700273
10.09.1998 KR 3700274

(71) Applicants:
  • Lee, Sang Ki
    Roselle, IL 60172 (US)
  • Markany Inc.
    Seoul, 100-400 (KR)

(72) Inventors:
  • CHOI, Jong Uk
    Kang-buk-ku,Seoul (KR)
  • KIM, Jong Won
    Yusung-ku,Taejeon (KR)
  • CHO, Jung Suck
    Yangchun-ggu,Seoul (KR)
  • LEE, Han Ho
    Joonglang-gu,Seoul (KR)

(74) Representative: Kahlhöfer, Hermann, Dipl.-Phys. et al
PatentanwälteKahlhöfer Neumann HeileinKarlstrasse 76
40210 Düsseldorf
40210 Düsseldorf (DE)

   


(54) WATERMARKING OF DIGITAL IMAGES USING WAVELET AND DISCRETE COSINE TRANSFORMS