Patent ID: 6914597
Filing Date: 2005-07-05
Classification: G09G

Abstract:
1. A bi-directional high speed video data transmission system, comprising: a transmitter operative to receive and transmit a first video data stream; a data pair connected to the transmitter, operative to relay the first video data stream from the transmitter; a receiver connected to the data pair and operative to receive the first video data stream relayed by the data pair; a first and second summing resistor connected to the data pair, the first and second summing resistor operative to convert a current transmitted across the data pair to a DC return current; a return transmitter connected to the first and second summing resistor and operative to receive the DC return current and a return video data stream, further operative to transmit the return video data stream; a return data pair connected to the return transmitter, operative to relay the return serial video data stream from the transmitter; and a return receiver connected to the return data pair and operative to receive the return video serial data stream, the return receiver further connected to the transmitter; wherein: the data pair comprises a first and second data line; the return data pair comprises a first and second return data line; the transmitter transmits the first video data stream by switching a DC-balanced current between the first and second data line, thus creating a first and second AC current on the first and second data line; the first and second summing resistor convert the current transmitted across the data pair to a DC return current by merging the first AC current with the second AC current; and the return transmitter transmits the return video data stream by switching the DC return current between the first and second return data line, thus creating a first and second AC return current on the first and second return data line.