A low-frequency, temporally asymmetric watermark carrier decreases in luminance in a substantially monotonic manner more slowly than it increases in luminance in a substantially monotonic manner. This allows the carrier to be embedded, e.g., in a video work, in a manner that renders the resultant watermark...http://www.google.es/patents/US20050025335?utm_source=gb-gplus-sharePatente US20050025335 - Method and apparatus for providing an asymmetric watermark carrier
Method and apparatus for providing an asymmetric watermark carrier
Número de solicitud: 10/872,921 Número de publicación: US 2005/0025335 A1 Fecha de presentación: 21 Jun 2004 Patente emitida: US6885757 ( Fecha de emisión 26 Abr 2005)
