A method and apparatus of broadcasting is provided that has a geographic identifier memory, an overlay memory storing an overlay, a receiver circuit for receiving a broadcast signal and a control circuit. The control circuit displays the overlay on the broadcast signal in response to the geographic ...http://www.google.fr/patents/US6728269?utm_source=gb-gplus-shareBrevet US6728269 - Device and method for efficient delivery of redundant national television signals
Device and method for efficient delivery of redundant national television ...
