A new hyperchaos based signal transmission scheme is proposed to transmit digital information signal by using the conventional synchronization of hyperchaos and digital transmission approaches. In this scheme the two different hyperchaotic system is used to generate an analog key after thresholding a different hyperchaotic signal. This signal along with the information digital signal is used to generate the transmitted signal. Then the transmitted signal is masked by the two different hyperchaotic signals of the transmitter and is transmitted through the channel to the receiver as well as used to drive the transmitter hyperchaotic systems using the concept of self-modulation. At the receiver end, suitable feedback loop is constructed for unmasking and then the subtraction rule is used to recover the information signal. By considering appropriate circuit configuration, the experimental results are presented.