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Many of the graphic cards sold today are equipped with a TV-out connector to display content on an ordinary television set.
The circuitry involved in the TV out is usually encapsulated in a shielded metal box. The chip set has to convert the graphics information that the video card receives into standard TV signals. These are usually composite video or S-Video, which are significantly different video encoding from computer monitors such as EGA, VGA, or XVGA.