Hue control circuit

Details Hue control circuit Hue control circuit

H - Electricity

04

N

350/42

H04N 9/73 (2006.01) H04N 9/64 (2006.01)

Patent

CA 1192998

ABSTRACT OF THE DISCLOSURE One color difference signal, for example, (B - Y) is modulated by a signal from a constant frequency wave generator which is phase-shifted by 90 degrees and other color difference signal (R - Y) is modulated by a signal generated from the constant frequency wave generator after the color difference signal (R - Y) is added with a prede- termined DC level during a predetermined duration. This predetermined DC level is controlled by a variable resistor, and the predetermined duration is determined by a burst flag pulse. The modulated signals of the both color difference signals (R - Y), (B - Y) are mixed by a mixer.

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