| 摘要 |
PURPOSE:To improve the deterioration of the straightness due to a characteristic of a differential emitter follower or the deterioration of the vertical resolution by directly outputting the adding signal of a comb line filter when there is a line correlation and correcting by a subtracting signal of the comb shape filter passing through a clip-shaped correlating device when there is no line correlation. CONSTITUTION:For a carrier chrominance components having the line correlation, as shown in figure D, the amplitude of the output (D) of a subtracter 3 is small, so that the output (J) of the clip-shaped correlating device 10 goes to a zero level. The output (K) of an adder 9 becomes the output (C) of the an adder 2 of the comb line filter. For the signal having no line correlation, among the outputs (D) of the subtracter 3, the amplitudes of a front edge Fr and a rear edge Bk become large, so that the output of the clip-shaped correlating device 10 becomes one as shown in figure J. The output (J) of this correlating device 10 and the output (C) of the adder 2 of the comb line filter are added and as shown in figure K, an original signal is reproduced in the output (K) of the adder 9.
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