Patent ID: 8896611

Claim:
A bidirectional data transmission system, comprising: an input device, comprising a user-input interface, for generating an input signal; a display for receiving the input signal and generating an output data signal according to the input signal; a transmission interface, coupled to the display, for transmitting the output data signal; and a host system comprising: a graphic device, coupled to the transmission interface, for receiving the output data signal and interpreting the output data with a digital visual interface driver or a high definition multimedia interface driver; and a processor, coupled to the graphic device, for processing the output data signal; wherein the display is set in a TV mode or in a PC mode to output the output data signal to a display controlling circuit of the display by which the output data signal is processed to perform channel switching, volume tuning, TV/PC mode switching, recording, or video recording in the TV mode, and to transmit the output data signal to the host system via the transmission interface and receive a control signal outputted from the host system by the display controlling circuit via the transmission interface in the PC mode to perform parameter setting of the display, and wherein the control signal outputted from the host system in the PC mode to perform parameter setting of the display is generated based on the output data signal received by the host system in the PC mode.