Patent ID: 8159927

Claim:
An interface system for coupling a first digital device with a second digital device over a cable, comprising: circuitry for combining a high frequency digital content channel for transmitting digital content from the first digital device to the second digital device and a low frequency back channel for transmitting information from the second digital device to the first digital device to form a composite channel, the circuitry comprising, a main channel transmit filter coupled between the first digital device and the cable and configured to filter the digital content channel, a back channel receive filter coupled between the first digital device and the cable and configured to filter the back channel, a back channel transmit filter coupled between the cable and the second digital device and configured to filter the back channel, a main channel receive filter coupled between the cable and the second digital device and configured to filter the digital content channel, and at least one cross-talk cancellation filter coupled between the digital content channel and the back channel and configured to reduce cross-talk interference between the back channel and the digital content channel; wherein the second digital device includes a receiver having a differential pair of inputs that includes a first differential input and a second differential input, the main channel receive filter is coupled between the first differential input and the cable, and a cross-talk cancellation filter is coupled between the second differential input and the back channel.