Differential phase distortion
During broadcasting, the inherent non lineraity in electronic devices may cause a level dependent phase shift.[1] Differential phase distortion (DP or dP) is the shift of color signal phase with respect to the colorburst phase. Since DC levels of the light colors and the colorburst are different, this type of distortion is more pronounced in lighter scenes. Especially a slight change in skin color may be irritating to the viewers. (too yellow or too red skin color dependeing on whether shift is positive or negative)
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