For residential high definition video, HD cables are restricted to HDMI. It is the global standard for domestic HD and has been adopted by manufacturers and broadcasters for c
…ommercial reasons including copy protection. There are devices that convert HDMI to CAT5 or CAT6 cables to increase the maximum distance of the cable, up to 100 feet or more compared to 20 to 30 for most simple HDMI cables. Early HD equipment featured analog component HD connections using 3 co-ax cables. These were quickly taken off the market when HDMI was introduced and it is rare to find analog HD interfaces today. In the commercial and broadcast field, co-ax cable remains the most common interface using SDI and HD-SDI formats. Increasingly, HD signals are being carried over networks although it will be some time before this method replaces the traditional co-ax cables. ( Full Answer )