Colorburst

200px|right|thumb|Horizontal sync and color burst of the composite output of a Commodore 64 computer

Colorburst is one part of the composite sync used in analog television signals. It consists of a "packet" of the sine wave chroma subcarrier and is used as a reference to decode color information in the video. By synchronizing an oscillator with the colorburst at the back porch (beginning) of each scan line, a television receiver is able to restore the suppressed carrier of the chrominance (color) signals, and in turn decode the color information.