Global Patent Index - EP 1034648 A1

EP 1034648 A1 2000-09-13 - METHOD AND APPARATUS FOR USE OF A WATERMARK AND A RECEIVER DEPENDENT REFERENCE FOR THE PURPOSE OF COPY PROTECTION

Title (en)

METHOD AND APPARATUS FOR USE OF A WATERMARK AND A RECEIVER DEPENDENT REFERENCE FOR THE PURPOSE OF COPY PROTECTION

Title (de)

VERFAHREN UND VORRICHTUNG ZUR VERWENDUNG EINES WASSERZEICHENS UND VOM EMPFÄNGER ABHÄNRIGE VERWEIS ZUM KOPIERSCHUTZ

Title (fr)

PROCEDE ET APPAREIL PERMETTANT D'UTILISER UN FILIGRANE ET UNE REFERENCE DEPENDANT DU RECEPTEUR A DES FINS DE PROTECTION CONTRE LA COPIE

Publication

EP 1034648 A1 (EN)

Application

EP 99932875 A

Priority

  • EP 9904930 W
  • US 9272598 P
  • US 32080699 A

Abstract (en)

[origin: WO0004688A1] A copyright protection system for protecting content wherein a receiver dependent ticket is calculated at a source device by combining a receiver dependent identifier with a ticket. The receiver dependent identifier is transmitted from the receiver to the source device prior to the source device transmitting watermarked content to the receiver. The receiver dependent identifier is also stored at the receiver. Thereafter, the source device transmits, to the receiver, watermarked content, the ticket, and the receiver dependent ticket. At the receiver, the stored receiver dependent identifier is combined with the ticket in the same way that the receiver dependent identifier is combined with the ticket at the source device. A result of the combination is compared to the receiver dependent ticket and if the result equals the receiver dependent ticket, then the watermark and ticket may be compared in the usual way to determine the copy protection status of the copy protected content.

IPC 1-7 (main, further and additional classification)

H04L 29/06

IPC 8 full level (invention and additional information)

G06F 12/14 (2006.01); G06F 21/10 (2013.01); G09C 1/00 (2006.01); G09C 5/00 (2006.01); G11B 20/10 (2006.01); H04L 29/06 (2006.01); H04N 1/387 (2006.01); H04N 5/91 (2006.01)

CPC (invention and additional information)

H04L 63/08 (2013.01); G06F 21/10 (2013.01); H04L 29/06 (2013.01); H04N 21/2351 (2013.01); H04N 21/42684 (2013.01); H04N 21/6582 (2013.01); H04N 21/8355 (2013.01); H04N 21/8358 (2013.01); H04L 2463/103 (2013.01)

Citation (search report)

See references of WO 0004688A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0004688 A1 20000127; EP 1034648 A1 20000913; JP 2002521868 A 20020716; TW 431104 B 20010421

INPADOC legal status


2005-01-19 [18W] WITHDRAWN

- Effective date: 20041123

2000-09-20 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000727

2000-09-13 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE