Hue control circuit

Details Hue control circuit Hue control circuit

H - Electricity

04

N

350/59

H04N 9/64 (2006.01)

Patent

CA 1221762

-14- ABSTRACT: In a hue control circuit for controlling the phase between a colour synchronising signal and a chromin- ance signal by a setting clement (57), this phase control is obtained without the amplitude being influenced, by deriving (via 17) from the original colour synchronising or chrominance signal a colour synchronising of chromin- ance signal whose phase is shifted through 90° and by controlling the amplitude of each of these colour synchro- nising or chrominance signals and adding these signals together (in 35). One colour synchronising or chrominance signal is amplitude-controlled cosinusoidally (by 25) and the other colour synchronising or chrominance signal is amplitude-controlled sinusoidally (by 13) by means of the setting element (57).

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