Patent ID: 6970517

Claim:
An information transmission system comprising: a first station connected to a data source supplying data codes thereto at irregular intervals, and including a first data converter inserting synchronous codes into said irregular intervals for producing a modulating signal, a modulating unit modulating a carrier signal with said modulating signal for producing a modulated signal on the basis of said data codes through a modulating technique selected from plural candidates and a data converting unit connected to said modulating unit for producing an output signal from said modulated signal; a second station supplied with said output signal of said data converting unit, and including a discriminating unit analyzing said output signal so as to determine said modulating technique employed in said modulating unit and producing a control signal representative of said modulating technique, a demodulating unit supplied with said output signal of said data converting unit, capable of demodulating said output signal through any one of demodulating techniques respectively corresponding to said candidates and responsive to said control signal for producing a demodulated signal through the demodulating technique corresponding to said modulating technique, and a second data converter connected to said demodulating unit and eliminating said synchronous codes from said demodulated signal so as to reproduce said data codes; and an information transmitting medium provided between said first station and said second station.