PHASE ERROR
A change in the color subcarrier signal whereby its timing is moved out of phase, i.e., occurring at a different instant relative to the original signal. Since color information is encoded in a video signal as a ratio between the modulated color signal and the color burst phase, a deviation in the color subcarrier phase results in a change in the hue of the picture. In NTSC video transmission, phase error results in a substantial change in the hue. In PAL, small changes in hue are automatically corrected, and only a minor reduction in color saturation occurs. The hue remains consistent.
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