Topic
Tint control
About: Tint control is a research topic. Over the lifetime, 30 publications have been published within this topic receiving 122 citations.
Papers
Patent•
7 Jun 1983TL;DR: In this paper, a color TV receiver designed to digitally process I and Q color mixture signals incorporates chroma gain control, static tint control and autoflesh in the circuitry for converting the I/Q signals to (R-Y), (B-Y) and (G-Y).
Abstract: A color TV receiver designed to digitally process I and Q color mixture signals incorporates chroma gain control, static tint control and autoflesh in the circuitry for converting the I and Q signals to (R-Y), (B-Y) and (G-Y) for R,G,B matrixing. The magnitude and angle of the vector sum of I and Q are first determined. The angles are then adjusted for static tint control and then applied to a ROM which is programmed to output angles adjusted for fleshtones. Angles from the autoflesh ROM are applied to a summing circuit which algebraically adds to the flesh corrected angle, angle values corresponding to the angular displacement between the I axes and the (R-Y), (B-Y) and (G-Y) axes. The angles produced by the summing circuit are applied to a look-up ROM which produces the cosine values of the applied angles. The magnitude signal is amplified by coefficients which relate the I and Q signals to (R-Y), (B-Y) and (G-Y) components and which coefficients may be amplified by a chroma gain signal. The amplified magnitude signal is thereafter multiplied by the cosine values which effectively projects the vector sum or chrominance signal onto the respective (R-Y), (B-Y) and (G-Y) axes to generate instantaneous (R-Y), (B-Y) and (G-Y) signal samples.
16 citations
Patent•
1 Dec 1994
TL;DR: In this paper, a display control circuit controls the outputs of the three video DACs of an RGB monitor on a window-to-window basis to enable the display of motion video and text on the same screen with different brightness and/or tint.
Abstract: A display control circuit controls the outputs of the three video DACs of an RGB monitor on a window-to-window basis to enable the display of motion video and text on the same screen with different brightness and/or tint. A digital overdrive signal, synchronized to the video DAC digital inputs, is used to enable added DAC elements for the pixels in the video windows only. Stored digital instructions determine how many and which added DAC elements are enabled by the overdrive bit(s). By storing different instructions for each of the three video DACs, the circuit may also provide window-dependent tint control. By increasing the number of bits of digital data synchronized to the digital DAC inputs, the stored instructions may be reduced or eliminated. In this case, each of several windows may be set to differing brightness and tint levels. As many different values of brightness and tint may be available as desired by increasing the number of synchronized input enabling bits and the number and strength of the added DAC elements.
14 citations
Patent•
29 Dec 1975TL;DR: A controllable phase shifting circuit suitable for providing tint control in a color television system comprises first and second differential amplifiers, each providing antiphase outputs and supplied respectively with first-and second alternating color reference signals which are in a first predetermined (e.g., quadrature) phase relation.
Abstract: A controllable phase shifting circuit suitable for providing tint control in a color television system comprises first and second differential amplifiers, each providing antiphase outputs and supplied respectively with first and second alternating color reference signals which are in a first predetermined (e.g., quadrature) phase relation. A third signal, which is a fractional part of one of the first two signals, is combined with the other of the first two signals at its respective amplifier input to produce a fourth signal with a phase different from that of the first, second or third signals. A third amplifier provides differential gain control inputs to the first and second amplifiers. A combining circuit sums relatively in-phase or antiphase output signal components from the first and second amplifiers to produce an output signal with a desired phase (e.g., flesh tone phase). The desired phase is controllable in accordance with the gain control input signals such as can be developed in response to an adjustable tint control potentiometer or similar device.
13 citations
Patent•
17 Jan 2001TL;DR: In this paper, a device consisting of a tint controller and a color space converter is proposed for decoding a television video signal, which is used for converting color space signals into tint considered coefficients having a tint control considered.
Abstract: Device and method for decoding a television video signal are suggested. The device includes a tint controller and a color space converter. The tint controller converts a plurality of color space converting coefficients which is used for converting color space signals into R, G, B signals into tint considered coefficients having a tint control considered. On the other hand, the color space converter produces the R, G, B signal displayable on a monitor by using the tint considered coefficients from the tint controller and the color space signals.
10 citations
Patent•
3 Jul 1973TL;DR: In this paper, the phase shift circuit is constructed in an integrated circuit form as a tint control or as an automatic frequency and phase control for a color oscillator, or the like.
Abstract: An electronic phase shift circuit suitable for construction in integrated circuit form as a tint control or as an automatic frequency and phase control for a color oscillator, or the like. In the phase shift circuit, input signals are coupled via two signal paths to a signal adding or summing circuit. Predetermined but different phase shifts are provided in the two signal paths. Additionally, one signal path includes a differential control circuit responsive to applied control signals for varying the amplitude of signals coupled through that path. The resultant phase of the sum of the signals with respect to the phase of the input signals is variable according to the magnitude of applied control signals.
9 citations
Performance Metrics
| Year | Papers |
|---|---|
| 2005 | 1 |
| 2002 | 1 |
| 2001 | 3 |
| 2000 | 1 |
| 1997 | 1 |
| 1996 | 1 |