COLOR SIGNAL PROCESSING CIRCUIT
PURPOSE:To dissolve the disturbance of the hue of a color signal just after dropout by inputting a color signal at 1H preceding to an ACC detection circuit at dropout so a to suppress the fluctuation of the ACC detection voltage at dropout. CONSTITUTION:A reproduced color signal in 3.58MHz normally...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | PURPOSE:To dissolve the disturbance of the hue of a color signal just after dropout by inputting a color signal at 1H preceding to an ACC detection circuit at dropout so a to suppress the fluctuation of the ACC detection voltage at dropout. CONSTITUTION:A reproduced color signal in 3.58MHz normally is inputted to an ACC detection circuit 9 and a color signal in 1H (one horizontal period) preceding is circulated at dropout and inputted to the ACC detection circuit 9. Thus, the fluctuation of the ACC detection voltage generated at dropout is suppressed to make the gain of an ACC circuit 2 stable. Thus, the hue disturbance of the color signal just after dropout outputted from the ACC circuit is dissolved and a color signal without defect or disturbance even at dropout is obtained at the 3.58MHz reproduced color signal output. |
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