Automatic Color Correction (ACC)
Automatic Color Correction (ACC) – A circuit found in many consumer viewing devices that attempts to compensate for the “Never Twice the Same Color” broadcast problems. This circuit can go far beyond the Auto Tint function in that it changes color saturation as well as type of color. In most cases where ACC is present, it cannot be defeated. Adjusting the color and tint controls, using the SMPTE Color Bar pattern and the blue filter will result in a gross misadjustment of color level on the set. The color level may have to be reduced by as much as half the value calibrated with the SMPTE Color Bar pattern.
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