This disclosure describes methods and systems for encoding a digital watermark into and/or detecting a digital watermark from a host (or media) signal such as audio, video or imagery. One implementation involves a method of detecting a digital watermark. The method includes: receiving a host signal carrying...http://www.google.de/patents/US7489801?utm_source=gb-gplus-sharePatent US7489801 - Encoding and decoding signals for digital watermarking
