COLOR BURST
A reference color subcarrier signal transmitted at the beginning of each scanning line (during the blanking period) of a composite video signal or the ''C'' component of a Y/C signal. It is used for color synchronization and to establish a reference for the color information following it. The color burst is an amplitude and phase reference for both color hue and color intensity. It is transmitted at the DC voltage level which is practically the black level of the signal. The luminance signal, which follows the color burst, should not fall below the color burst level. Black level clamping is usually performed in the color burst area.
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