Many people use component video cables to connect items like DVD players, cable boxes, and satellite boxes to their televisions. When connecting a high-definition component, particularly a Blu-ray player or high-definition gaming system, an HDMI cable is normally preferred.
An RCA connector, sometimes called a phono connector or (in other languages) Cinch connector, is a type of electrical connector commonly used to carry audio and video signals. The name RCA derives from the Radio Corporation of America, which introduced the design by the early 1940s for internal connection of the pickup to the chassis in home radio-phonograph consoles.
HDMI is a one-cable way to connect high-definition AV components and is currently the most common connection method used on Blu-ray players, AV receivers, cable/satellite set-top boxes, gaming consoles, and video displays such as plasma/LCD TVs and front projectors.
If your TV is rated for 720p or 1080p, use an HDMI cable rather than an S-video cable. If you have to overhaul your cable collection just to make your components all link to your TV with S-video, consider purchasing a new TV rather than new cables. S-video cables don't support audio.