Patent ID: 6219537
Filing Date: 2001-04-17
Classification: H04H,H04N

Abstract:
A wireless digital communication system comprising:broadcast interface means for encoding message information on the vertical blanking interval (VBI) of a video signal, said message information being encoded to the VBI format so as to form a pre-formatted signal;broadcast means for transmitting an out-going signal, said out-going signal having said pre-formatted signal being modulated and embedded in the VBI of said video signal, said pre-formatted signal being received from said broadcast interface means and being transmitted on a carrier of said out-going signal;at least one transceiver means for receiving said out-going signal and for transmitting a return signal on said carrier of said out-going signal, said transceiver means having means for detecting clock information relating to the synchronization or timing of said broadcast means, said transceiver means further including:decoding means for identifying said pre-formatted signal from said out-going signal and for decoding said message information;output means for outputting said message information to a display means;input means for inputting return message information;encoding means for encoding said return message information; andmodulating means for inserting said return signal on the out-going signal of the broadcast means,antenna means for detecting said return signal,return signal processor (RSP) means for detecting said return signal from said carrier of the out-going signal of the broadcast means,message processor (MESP) means for decoding of said return signal having said return signal message information, said MESP means adapted to transmit said return signal message information to a communications network.