Digital communication system and method

Abstract

A digital communication system for transmitting and receiving video data signals and control data signals over a transmission line comprises an open-loop equalizer circuit and a control data extension circuit. The open-loop equalizer circuit is operable to receive video signals transmitted over the transmission line and output equalized video data signals. The control data extension circuit is operable to inject a boost current at the receive end of the transmission line during a positive transition in the control data signal, and clamp the receive end of the transmission line during a negative transition of the control data signal.

1 . A digital communication system for processing transition minimized differential signal (TMDS) communication data signals and Display Data Channel (DDC) communication signals over a transmission line, the system comprising:
 an open-loop equalizer circuit to receive TMDS communication signals transmitted over the transmission line and output equalized TMDS communication data signals,   the open-loop equalizer circuit providing either proportional or disproportional equalization to the TMDS communication data signal, wherein proportional equalization provides a frequency dependent gain that is at or about the inverse of a frequency dependent attenuation caused by the transmission line, and wherein disproportionate equalization provides a frequency dependent gain that is greater than the inverse of a frequency dependent attenuation caused by the transmission line.