PURPOSE: To simplify a circuit design or the like by decreasing wiring amounts, and reducing the set area of a circuit,

CONSTITUTION: As for the movement detector of a television signal which detects the movement of a picture by a block matching method, a part which searches the absolute value of a difference between pixel data of a present frame and the pixel data of the previous frame is constituted of first - third finite impulse response filters 1-3, and a minimum value detecting circuit 23 is constituted of one comparator 19 and one selector 21.