EP 1557043 A1 20050727 - DEVICE FOR MARKING AND RESTORING MULTIMEDIA SIGNALS
Title (en)
DEVICE FOR MARKING AND RESTORING MULTIMEDIA SIGNALS
Title (de)
VERFAHREN UND VORRICHTUNG ZUR WASSERZEICHENDETEKTION UND -EINBETTUNG
Title (fr)
DISPOSITIF POUR LE MARQUAGE ET LA RESTITUTION DE SIGNAUX MULTIMÉDIA
Publication
Application
Priority
- FR 0303208 W 20031028
- FR 0213605 A 20021030
Abstract (en)
[origin: FR2846827A1] The device has a formatting module to calculate marking information based on a calculated response of a transformed signal and code words associated with a message. A modulator (18) modulates amplitude of a carrier coefficient by a corresponding quantity related to energy weight of the message and carriers to provide a marking coefficient. A summer (20) adds the marking coefficient to the coefficient of the transformed signal. The formatting module calculates the response of the transformed signal at demodulation of carriers defined by protection keys of the message.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
H04N 1/32154 (2013.01 - EP US); H04N 1/32187 (2013.01 - EP US); H04N 1/32352 (2013.01 - EP US); H04N 19/467 (2014.11 - EP US); H04N 2201/3233 (2013.01 - EP US); H04N 2201/327 (2013.01 - EP US); H04N 2201/3281 (2013.01 - EP US)
Citation (search report)
See references of WO 2004043072A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
FR 2846827 A1 20040507; FR 2846827 B1 20050225; AU 2003295009 A1 20040607; CA 2503466 A1 20040521; EP 1557043 A1 20050727; JP 2006505207 A 20060209; US 2006159262 A1 20060720; WO 2004043072 A1 20040521
DOCDB simple family (application)
FR 0213605 A 20021030; AU 2003295009 A 20031028; CA 2503466 A 20031028; EP 03786001 A 20031028; FR 0303208 W 20031028; JP 2004549262 A 20031028; US 53280505 A 20051209