Phase correction circuit, signal discrimination circuit, phase correction method and signal discrimination method

摘要

An absolute-value difference arithmetic section obtains an absolute-value difference from a first component and a second component. A component discriminating section or a signal discriminating section (circuit) discriminates an inputted chroma signal by phase discrimination and distance discrimination using the absolute-value difference. A correction executing section corrects the phase of the inputted chroma signal using the absolute-value difference. The absolute-value difference arithmetic section is formed by an adder and/or a subtracter on a small circuit scale.