HT Games
Composite
The Wii comes bundled with a composite video cable, which is used to provide a standard definition video signal to all TVs. The composite connections use phono plugs, and split the signal into three distinct connections: video, audio left-channel and audio right-channel. The plugs are color-coded in yellow, red and white to correspond with the color-coded connectors on the TV. Composite is the lowest quality video output the Wii is capable of.
Component
If a component cable is connected to the Wii, it can output video using a 480 line progressive scan signal. Progressive scan offers a clearer, crisper image than the interlaced signal sent via a composite cable. The component cable also uses color-coded phono plugs for connecting to the TV, only there are five connectors in total rather than three. The improved image quality is achieved by splitting the video signal into a red channel, green channel and blue channel. The two remaining phono plugs are for stereo audio. This is the Wii's highest quality video output option.
SCART
If the TV that the Wii is connecting to doesn't have the three required composite phono connectors, an adaptor can be used to convert the connection to a SCART plug. SCART is a 21-pin connector that offers all possible options for sending and receiving standard definition video. A phono-to-SCART adaptor can be used to connect the Wii's bundled composite cable to the TV's SCART socket, although the video quality will remain the same.
VGA
Cables are available for connecting the Wii to a computer monitor through a VGA connector. This is the standard type of video input for computer monitors, and it carries the same high quality progressive signal as a component cable. The VGA connector does not have provision for audio, however, and most Wii VGA cable have two extra phono connectors for an external audio receiver. Nintendo does not manufacture any official Wii VGA cables, so they must be sourced from third-party manufacturers.