Abstract: A method for determining a chroma gain for a modulated chroma signal, comprises the steps: receiving the modulated chroma signal; generating a first chroma gain as a function of a color burst of the received modulated chroma signal; generating a second chroma gain as a function of a peak amplitude of the modulated chroma signal; and determining a final chroma gain for the received modulated chroma signal as a function of the first generated chroma gain and the second generated chroma gain, wherein the determined chroma gain is applied on the modulated chroma signal.
Abstract: An apparatus to provide a fall-back procedure for a PRC imaging device is described. The apparatus includes a PRC controller, a system resource monitor, and a PRC setting calculator. The PRC controller outputs a stream of images at an adjustable temporal rate. The adjustable temporal rate is constrained within a range defined by a first predetermined rate and a second predetermined rate. The system resource monitor obtains a measurement of system resource utilization. The PRC setting calculator determines a setting for the PRC controller in response to the measurement of system resource utilization. Additionally, the PRC controller determines a value for the adjustable temporal rate in response to the setting.
Abstract: There is provided a color killer circuit comprising a burst amplitude detection unit that detects an amplitude of a color burst; a delay unit that stores, delays, by a predetermined period of time, and outputs the detected amplitude; a subtractor that calculates a difference between an output from the burst amplitude detection unit and an output from the delay unit; a first comparator that compares the output from the burst amplitude detection unit with a first threshold value to determine whether or not the output from the burst amplitude detection unit is less than the first threshold value; and a second comparator that compares an output from the subtractor with a second threshold value to determine whether or not the output from the subtractor is greater than the second threshold value, wherein the color killer circuit masks the color component of the composite video signal when the first comparator determines that the output from the burst amplitude detection unit is less than the first threshold value,
October 10, 2008
Date of Patent:
December 20, 2011
Sanyo Electric Co., Ltd., Sanyo Semiconductor Co., Ltd.
Abstract: A method and system of optimizing content delivery at a processing element in a dynamic content delivery architecture, the method having the steps of: receiving a content and metadata envelope at the processing element; checking the content and metadata envelope to determine whether the content and metadata envelope includes metadata for the processing element; if the content envelope contains metadata for the processing element, extracting and caching the metadata; if the content envelope does not contain metadata for the processing element, retrieving metadata for a content provider associated with the content from a cache on the processing element; and applying the extracted or retrieved metadata to the content and metadata envelope.
Abstract: 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 representing the color pixel of the input image; determining the color saturation level S in dependence on the first chrominance value U and the second chrominance value V; determining a saturation limiting parameter ? in dependence on the color saturation level S; obtaining an adjusted first chrominance value by multiplying the first chrominance value U by the saturation limiting parameter ?; obtaining an adjusted second chrominance value by multiplying the second chrominance value by the saturation limiting parameter ?; and representing a color pixel of an output image with the adjusted first and second chrominance values. The process is repeated for each pixel of each image of the input video signal.
Abstract: 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 first plurality of coefficients to a first predetermined value. The mechanism then modifies the anti-ghosting filtering based on the results of this comparison. In one embodiment, the mechanism includes both an adaptive baseband equalization filter and a lookup table filter.
Abstract: A video signal processing apparatus A comprises: an adder 107 for generating a second address value S106 which has a predetermined phase difference from a first address value S101 outputted by an address value output means 120 and outputting the same; a selector 108 for selecting either a first address value S101 or a second address value S106 to output as an output signal S107; a vertical synchronizing signal output means 123 for outputting the vertical synchronizing signal S104 to the selector 108; a ROM 109 for outputting first data corresponding to the first address value S101 or second data corresponding to the second address value S106 as a signal S108; a loading hold mode flip-flop 110 for preserving the first data; a loading hold mode flip-flop 111 for preserving the second data; and a hue adjustment means B which adjusts the hue of the video signal by using the output signal S109 of the loading hold mode flip-flop 110 and the output signal S110 of the loading hold mode flip-flop 111.
Abstract: 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 overload protection unit (50) is provided including a saturation calculator (78) determines the saturation of the vector components and provides a saturating indicating signal to a gain characteristic unit (72) which jointly controls the gain of the amplifiers to proportionally limit the vector component magnitudes as a given function of the saturation indicating signal on a pixel by pixel basis thereby providing output component vectors (U,V) exhibiting no tint shift upon limiting conditions.
June 30, 1999
Date of Patent:
January 23, 2001
Thomson Licensing S.A.
Mark Francis Rumreich, Mark Robert Zukas, Ronald Thomas Keen
Abstract: 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 chrominance signal into first and second chrominance reference signals having a predetermined phase difference with respect to each other using a carrier signal having an arbitrary burst signal, detecting the squared components of the separated first and second chrominance reference signals respectively, and outputting the amplitude value of the burst signal using a composite signal of the squared components of the detected first and second chrominance reference signals. An apparatus using this method can detect the level of the burst signal regardless of the phase difference between the burst signal and the demodulated carrier.
Abstract: 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 corresponding to each color or red, green and blue on a liquid crystal panel based on the voltage levels of the RGB analog video signals so as to perform color display. The method includes the steps of detecting a color saturation of a picture based on the composite video signal, and controlling the transmittance of a liquid crystal panel based on the transmittance characteristic (T-V curve a) of each pixel relative to normal RGB analog video signals in the case that the color saturation is less than a predetermined value.