EP 1172001 A4 20020814 - UTILIZING DATA REDUCTION IN STEGANOGRAPHIC AND CRYPTOGRAPHIC SYSTEMS
Title (en)
UTILIZING DATA REDUCTION IN STEGANOGRAPHIC AND CRYPTOGRAPHIC SYSTEMS
Title (de)
VERWENDUNG VON DATENREDUKTION IN STEGANOGRAPHISCHEN UND KRYPTOGRAFISCHEN SYSTEMEN
Title (fr)
UTILISATION DE LA REDUCTION DE DONNEES DANS DES SYSTEMES STEGANOGRAPHIQUES ET CRYPTOGRAPHIQUES
Publication
Application
Priority
- US 0006522 W 20000314
- US 12599099 P 19990324
Abstract (en)
[origin: WO0057643A1] The present invention is a method for protecting a data signal where the method comprises the following steps: applying a data reduction technique (200) to the signal to produce a reduced signal, subtracting (60) the reduced data signal from the original signal to produce a remainder signal (39), embedding (300) a first watermark into the reduced data signal to produce a watermarked redued data signal, and adding (50) the watermarked reduced signal to the remainder signal to produce an output signal (90). A second watermark (301) may be embedded into the remainder signal (39) before the final addition (50) step. Cryptographic techniques may be employed to encrypt the remainder signal and/or the reduced signal prior to the addition step (50).
IPC 1-7
IPC 8 full level
G06T 1/00 (2006.01); H04N 1/32 (2006.01); H04N 7/167 (2011.01); H04N 7/26 (2006.01)
CPC (source: EP)
G06T 1/0021 (2013.01); G06T 1/0071 (2013.01); H04N 1/32149 (2013.01); H04N 1/32267 (2013.01); H04N 1/32272 (2013.01); H04N 1/32304 (2013.01); H04N 7/1675 (2013.01); H04N 19/467 (2014.11); H04N 21/23892 (2013.01); H04N 21/8358 (2013.01); H04N 2201/3233 (2013.01)
Citation (search report)
- [X] WO 9837513 A1 19980827 - TELSTRA R & D MAN PTY LTD [AU], et al
- [Y] US 4969204 A 19901106 - JONES PAUL W [US], et al
- [Y] EP 0651554 A1 19950503 - EASTMAN KODAK CO [US]
- [PX] WO 9962044 A1 19991202 - UNIV CALIFORNIA [US], et al
- [A] JOHNSON A ET AL: "TRANSFORM PERMUTED WATERMARKING FOR COPYRIGHT PROTECTION OF DIGITAL VIDEO", IEEE GLOBECOM 1998. GLOBECOM '98. THE BRIDGE TO GLOBAL INTEGRATION. SYDNEY, NOV. 8 - 12, 1998, IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, NEW YORK, NY: IEEE, US, vol. 2, 1998, pages 684 - 689, XP000825846, ISBN: 0-7803-4985-7
- See references of WO 0057643A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0057643 A1 20000928; EP 1172001 A1 20020116; EP 1172001 A4 20020814
DOCDB simple family (application)
US 0006522 W 20000314; EP 00919398 A 20000314