A watermark system includes an embedder, detector, and reader. The watermark embedder encodes a watermark signal in a host signal to create a combined signal. The detector looks for the watermark signal in a potentially corrupted version of the combined signal, and computes its orientation. Finally,...http://www.google.fr/patents/US20030128861?utm_source=gb-gplus-shareBrevet US20030128861 - Watermark embedder and reader
Numéro de demande: 10/274,290 Numéro de publication: US 2003/0128861 A1 Date de dépôt: 18 oct. 2002 Brevet délivré: US7720249 ( Date de délivrance 18 mai 2010)
