COMPOSITE VIDEO SIGNAL SEPARATING DEVICE

PURPOSE:To execute non-correlation detection for 2H and to separate a luminance signal and a chrominance signal without fail by extracting the low frequency component of the luminance signal and detecting non-correlation with a signal before 2H. CONSTITUTION:A 2H delay line 20 is used for the detection of a vertical transposition part instead of a 1H delay line. When a video signal (a) is inputted to an input terminal 1, a luminance band signal (y) and a chrominance band signal (c) of the output of a tandem filter 2 go to be signals (b) and (c). The output of an adder 15 for line non-correlation detection goes to be a signal (d) and a control signal (e) is obtained for the output of a detector 16. Signals (f) and (g) are obtained by this control signal (e) and outputted from output terminals 11 and 19 respectively as a luminance signal Y and a chrominance signal B. Thus, the generation of various interference phenomenon is suppressed and the luminance signal and the chrominance signal can be separated almost completely.