TV encoder with a function of adjusting hue

Details TV encoder with a function of adjusting hue TV encoder with a function of adjusting hue

2005-11-01

2005-11-01

Kostak, Victor R. (Department: 2614)

Television

Image signal processing circuitry specific to television

Hue control

C348S642000

Reexamination Certificate

active

06961098

ABSTRACT:
A TV encoder with a function of adjusting hue for receiving a first and second color mixture signals comprises a first and second multiplexors, a sin-cos generator, a first and second multiplier circuits, and an adder circuits. The first multiplexor alternately outputs the second color mixture signal and its inverted signal. The second multiplexor alternately outputs a first angle signal representative of an angle and a second angle signal representative of the negative value of the angle. The angle is adopted to change the hue. The sin-cos generator outputs a sin and cos signals with a phase angle alternately determined by the angle and its negative value. The first color mixture signal and the sin signal are multiplied through the first multiplier circuit so as to be output as a first product signal. The second color mixture signal and its inverted signal are alternately multiplied by the cos signal through the second multiplier circuit so as to output as a second product signal. Finally, the first and second product signals are added through the adder circuit.

REFERENCES:
patent: 5161005 (1992-11-01), Harradine
patent: 6124899 (2000-09-01), Swan et al.
patent: 6674487 (2004-01-01), Smith

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