Method and system for embedding a unique and different digital watermark in digital contents for each access without increasing the overhear or load at the contents server. The contents server has a digital watermark-embedded contents storage unit for storing a plurality of digital contents where a different...http://www.google.fr/patents/US7748051?utm_source=gb-gplus-shareBrevet US7748051 - Contents server, contents receiving apparatus and network system for adding information to digital contents
Contents server, contents receiving apparatus and network system for adding ...
