HDanywhere video distribution systems require a single network cable to be run from each HDTV location, back to a central point. Some single wire systems use HDBaseT technology to transmit over 1 x Cat5e/6/7 cable up to a 100 / 328 ft metre distance.
This article is designed to give you a good overview of the standard of wiring needed for a HDBaseT system. For a detailed, official set of guidelines issued by HDBaseT click here.