Apparatus and methods are provided for embedding or embedding digital data into an analog host or cover signal. A distributed signal feature of the cover signal in a particular domain (time, frequency or space) is calculated and compared with a set of predefined quantization values corresponding to an...http://www.google.fr/patents/US7606366?utm_source=gb-gplus-shareBrevet US7606366 - Apparatus and method for embedding and extracting information in analog signals using distributed signal features and replica modulation
Apparatus and method for embedding and extracting information in analog ...
