HDTV Video: A Quick Guide to Inputs

Because several people continue to be understandably confused, a list, in order from worst to best, of the differing ways you can send video signals from an output unit—such as a DVD player, cable or satellite box, or video game console—to your television.
For best video fidelity, pick the one farthest down the list that your television supports.

• RF – The little two-pronged screw-in inputs. Worst possible video input available.
• Coaxial – A single metal wire surrounded by a threaded nut. Includes audio.
• RCA/Composite – A single “RCA” connector with a thick metal prong in the middle, surrounded by a metal sleeve. Often colored yellow and paired with red and white stereo audio RCA connections.
• S-Video – Single plug with multiple prongs. Looks like a PS/2 connector used on old mice and keyboards.
• VGA – The very same plug that many computer monitors use. Can support HDTV resolutions.
• Component – Three RCA connectors, all of which are necessary for video output. Can support HDTV resolutions. Is roughly on par with VGA in quality.
• DVI – The same plug used by most new computer monitors; rectangular, usually white with multiple pins and flat prongs. Can support HDTV resolutions and provides a digital signal.
• HDMI – Flat, isosceles trapezoidal plug. Can support HDTV resolutions. Also can carry audio signal, but is otherwise the same quality as DVI.