| 摘要 |
PURPOSE:To freely set the degree of the improvement of S/N by permitting an adder circuit to delay an output signal by 2H and adding it to a line sequential signal. CONSTITUTION:The line sequential signal Vin is inputted to the one terminal of the adder circuit 9. According to the coefficient K of a 1st coefficient multiplier 11, the level of an output signal V1 from the adder circuit 9 is modified through a 1H delay circuit 10. Moreover a 2H delay signal is inputted to the other input terminal of the adder circuit 9 through a 2nd 1H delay circuit 13. Color difference signals R-Y and B-Y are alternately outputted from the adder circuit 9 at every hour. A subtractor 12 outputs the difference signal V3 between input/output signals from the coefficient multiplier 11. A 2nd coefficient multiplier 14 changes the level of the signal V1, and a subtractor circuit 15 outputs the difference signal V2 between input/output signals from the coefficient multiplier 14. The color difference signals R-Y synchronized through changeover switches 5 and 6 which are synchronously changed over at every hour are outputted to a terminal 7, and the synchronized color difference signal B-Y to a terminal 8.
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