A method and apparatus for encoding information symbols onto an analog host signal modifies signal peaks of the host signal to fall within predetermined amplitude bands. A set of symbols is defined wherein each symbol corresponds to a defined number of signal peaks or to a particular ...http://www.google.com.au/patents/US5828325?utm_source=gb-gplus-sharePatent US5828325 - Apparatus and method for encoding and decoding information in analog signals
Apparatus and method for encoding and decoding information in analog signals ...
