PHASE CORRECTION CIRCUIT SIGNAL DISCRIMINATION CIRCUIT PHASE CORRECTION METHOD AND SIGNAL DISCRIMINATION METHOD

摘要

PURPOSE: To provide a signal discrimination circuit and a phase correction circuit with a small circuit scale. CONSTITUTION: An absolute value difference arithmetic section 3 acquires a difference (d) of an absolute value from a 1st component b1 and a 2nd component r1. A component discrimination section 4 or a signal discrimination section (circuit) 6 discriminates an input chrominance subcarrier signal (c) through phase discrimination and distance discrimination using an absolute value difference. A correction processing section 5 uses the absolute value difference to correct a phase of the input chrominance subcarrier signal (c). The absolute value difference arithmetic section 3 comprises an adder or/and a subtractor with a small circuit scale.