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7042520 |
Method for color saturation adjustment with saturation limitation
A method for adjusting and limiting a color saturation level S of a color pixel of an input image includes steps of: obtaining a first chrominance value U and a second chrominance value V...
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6268888 |
Mechanism for adaptive selection of anti-ghosting filtering
A mechanism for adaptive selection of anti-ghosting filtering accesses a first plurality of coefficients being used by the anti-ghosting filtering and compares a first set of one or more of the...
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6177962 |
Apparatus and method for preventing oversaturation of chrominance signals
A chrominance signal C is separated (30) into component vectors U and V and coupled via respective paths each including a controllable gain amplifier (60,62) to respective outputs (56,58). A chroma...
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5757439 |
Method for detecting color burst signal amplitude for chrominance signal level control and an apparatus therefor
A method for detecting color burst signal amplitude of a composite color image signal for use in an automatic color control circuit includes the steps of separating the burst signal loaded on the...
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5621479 |
Method of driving a liquid crystal display device
A method of driving a liquid crystal display device for converting a composite video signal into RGB analog video signals by a chrominance circuit, and controlling the transmittance of each pixel...
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5255080 |
Contrast corrector for video signal
For a video apparatus such as a television receiver, a gray level correcting device is provided to correct luminance and color saturation of a video signal, thereby making the reproduced image...
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5045926 |
Television image display apparatus
In a television image display apparatus, one field of an input video signal is divided into a plurality of areas in each of which image information is sampled, and an arithmetic processor provides...
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4962417 |
Chroma overload detector using a differential amplifier
In a color television receiver having first and second chroma amplifiers, a chroma overload detector uses a differential amplifier for peak detection of a chrominance signal over a predetermined...
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4635102 |
Chroma signal amplitude control apparatus
A chroma overload system includes an up/down counter to develop a chroma gain/attenuation signal. Overload conditions are detected and responsive thereto pulses are generated to cause the counter...
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4630102 |
Digital chroma overload system
A system for detecting overload conditions of a chrominance signal in which the chrominance signal is compared to a predetermined maximum desired amplitude value. Occurrences of the chrominance...
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4602276 |
Digital signal level overload system
A signal overload circuit for use in e.g. a digital TV receiver includes a piecewise linear weighting circuit which weights samples of greater magnitude proportionately more heavily than samples of...
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4511916 |
Method and device for correcting chrominance signal
A method and a device for correcting a chrominance signal is arranged such that, in obtaining a carrier chrominance signal by modulating a subcarrier with an input chrominance signal, a first hue...
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4447826 |
Digital television receiver automatic chroma control system
The gain of the chroma signal in a digital television receiver is controlled in accordance with the value of a composite gain factor which is an accumulation of gain control factors provided by a...
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4349834 |
Chroma signal gain control circuit
A chroma signal gain control circuit is constructed to include a first band pass amplifier, a second band pass amplifier, a burst gate circuit, a switch circuit and an ACC detecting circuit. The...
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4183047 |
Chroma level stabilizer
A chroma level control circuit for a television receiver is responsive to the average of selected portions of color difference signals to reduce deviations from a viewer-selected chroma level. The...
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4106055 |
Automatic color level control system with threshold tracking
A DC controlled amplifier is used to control the chrominance gain, and hence the color saturation, of a television receiver. The voltage on the wiper of a Color Control variable resistor and the...
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4106054 |
Automatic chroma level system
A color television receiver chrominance channel has first and second chrominance amplifiers supplying chrominance demodulators. An automatic chrominance control (ACC) is operative upon the first...
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4054905 |
Automatic chrominance gain control system
An automatic gain controlled chrominance signal amplifier system for a color television receiver is arranged to process composite chrominance signals having burst and image-representative...
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3982273 |
Switching arrangement for flesh tone correction and chrominance overload control circuits
Switching apparatus is included in a color television receiver for changing the threshold of a saturation overload detector and simultaneously changing the gain characteristics of an associated...
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3968516 |
Automatic gain control circuit
An automatic chrominance gain control circuit for a color television receiver distinguishes between lower frequency chrominance variations (large color objects) and higher frequency chrominance...
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3967313 |
Chrominance signal gain control circuit
A chrominance signal gain control circuit comprising a band pass amplifier of a gain control type for amplifying a signal including a burst signal and a chrominance signal while the gain thereof is...
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3962723 |
Automatic peak color control circuit
In a television receiver having a chrominance signal channel coupled to a cathode ray tube, an automatic peak color control circuit includes an envelope detector means providing a combined chroma...
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3943560 |
Picture level control with compatible automatic chroma control
A picture level control for a color television receiver which simultaneously varies luminance and chrominance signal levels and additionally provides a compensating voltage to prevent automatic...
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3936869 |
Automatic color level circuit with peak detector
A color television receiver includes an automatic chroma control (ACC) system and a switch selectable manual color level potentiometer and a closed loop automatic color level limiter (ACL) with a...
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3877067 |
Peak chroma control circuit
An Automatic Chroma Control Circuit for a color television receiver includes an integrated circuit chroma amplifier having a gain controlled by a DC voltage at a bias input. The output of the...
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3836708 |
COLOR TELEVISION SATURATION CONTROL
A color television receiver having a system for controlling the color saturation in which either of a divided dc voltage signal of a dc source or a mean-rectified dc signal of the output of a band...
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3812524 |
PRESET CONTROL SYSTEM FOR A COLOR TELEVISION RECEIVER
A color television receiver is provided with the customary manual controls for permitting a viewer to adjust brightness, contrast, saturation and hue of the image reproduced by the receiver. In...
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3764734 |
AUTOMATIC PEAK COLOR CONTROL
The color level of a chroma signal in a color television receiver is automatically maintained by applying a chroma signal to a variable gain amplifier and utilizing a detector for applying the...
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3740462 |
AUTOMATIC CHROMA GAIN CONTROL SYSTEM
Cascaded first and second gain-controlled amplifiers are used in the chrominance channel of a color television receiver. The gain of the first amplifier is controlled by an ACC loop employing a...
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3705260 |
VIDEO SIGNAL CONTROL CIRCUIT FOR COLOR TELEVISION
In a color television receiver in which a luminance signal and a chrominance signal are separated from a composite color video signal for amplification and color demodulation and then both of the...
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3578903 |
CONTROL CIRCUITS FOR PREVENTING KINESCOPE COLOR SATURATION DURING BLOOMING
In a color television receiver a condition arises where the load demands on deflection circuitry causes blooming during a color transmission. These increasing load demands are detected in the...
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3571499 |
AUTOMATIC SATURATION CONTROL FOR A COLOR TELEVISION RECEIVER
A color television receiver using direct demodulation of the color and brightness signals is provided with an automatic chroma control circuit for controlling the gain of the color IF amplifier...
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3267210 |
Automatic saturation control for color-television receiver
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3141064 |
Automatic chroma control from chroma signal
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3109887 |
Color television receiver
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2866846 |
Television color saturation control system
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