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| Number | Title | Issue Date |
| 8184206 | Pseudo digital gain control for broadband tuner A digital level control circuit, such as an Automatic Gain Control, includes a plurality of digitally selectable signal levels with transitions between levels gradually varied to avoid signal output level discontinuities. An up/down counter may be used to incrementa... | 05/22/2012 |
| 8169546 | Technique for tuner automatic gain control circuit for mobile television applications A technique for providing stable tracking performance to an AGC loop circuit comprises amplifying a wideband radio frequency signal; detecting signals and blockers adjacent to the radio frequency signal; lowering a gain of the radio frequency signal; mixing a local ... | 05/01/2012 |
| 8159617 | Universal, highly configurable video and graphic measurement device An apparatus and method for processing a video signal includes means for receiving the video signal, means for analyzing the video signal based upon a user supplied set of instructions, means for processing the video signal in accordance with the analysis, and means... | 04/17/2012 |
| 8130324 | Automatic gain control circuit An AGC circuit is provided which includes a first AGC detector circuit that switches whether the AGC voltage is output or not, a second AGC detector circuit that always outputs the AGC voltage, a first resistor with a high impedance compared to a tuned frequency of ... | 03/06/2012 |
| 8107014 | Digital receiver and method thereof A digital receiver includes an analog front-end circuit, an automatic-gain controller, a compensation circuit, and a demodulator. The analog front-end circuit receives an input signal, adjusts an average amplitude of the input signal, and converts the adjusted input... | 01/31/2012 |
| 8102473 | Image correction circuit, image correction method and image display An image correction circuit capable of preventing a loss of gray levels in a luminance region at the time of the direct current level conversion of a luminance signal to improve the quality of a displayed image. The image correction circuit detects an average peak l... | 01/24/2012 |
| 8089562 | Signal processing circuit A signal processing circuit includes an auto gain control circuit and amplifies a signal with an amplification ratio determined based on a synchronous signal level having a positive potential with respect to a black level included in a high definition television vid... | 01/03/2012 |
| 7973860 | Method and apparatus for adjusting contrast of image This invention relates to an apparatus for processing an input image including M input pixels. Each of the M input pixels respectively has an input gray scale. The apparatus includes a gain generating module, a contrast enhancing module, and a Gamma adjusting module... | 07/05/2011 |
| 7880814 | Visual processing device, display device, and integrated circuit The invention achieves a visual processing device that can execute precise contrast adjustment on image signals that have been input and that does not cause discrepancies in the output timing of the image signals that are output. The visual processing device is prov... | 02/01/2011 |
| 7830455 | TV set and method for managing gain value for each channel The present invention relates to method for managing gain value for each channel of a TV set, includes steps: signaling a tuner to receive broadcasting signals of the channel in response to a channel selection command; reading a predetermined gain value of the chann... | 11/09/2010 |
| 7773158 | Visual processing device, display device, and integrated circuit The invention achieves a visual processing device that can execute precise contrast adjustment on image signals that have been input and that does not cause discrepancies in the output timing of the image signals that are output. The visual processing device is prov... | 08/10/2010 |
| 7605872 | Video contrast adjusting method and system Methods and systems for adjusting color-saturation contrast of the video signal. Statistical information based on chrominance or luminance measures is analyzed to derive a gain function. The gain function is also determined according to the detection result of an ex... | 10/20/2009 |
| 7580081 | Setup level and dynamic range adjustment of an image display apparatus An image display apparatus includes an input range discriminator which discriminates a type of an input digital video signal, on the basis of a setup level and a dynamic range of the digital video signal; a signal processor which corrects the setup level and the dyn... | 08/25/2009 |
| 7573533 | Method of generating transfer curves for adaptive contrast enhancement Disclosed is a method for generating transfer curves for adaptive contrast enhancement. Transfer curves are generated so as to enhance the bright pixels in mostly dark images and the dark pixels in mostly bright images. For a dark image, a transfer curve is generate... | 08/11/2009 |
| 7545443 | Image signal processing apparatus and method In a conventional contrast adjustment circuit, since an entire signal level of a luminance signal is shifted, peak luminance is lowered, and luminance deterioration is undesirably raised. In the present invention, a direct-current component of a luminance signal is ... | 06/09/2009 |
| 7443455 | Automatic gain control based on multiple input references in a video decoder A video decoder (10) for receiving an input video signal and producing output signals for a digital display (12), and involving automatic gain control (AGC) functions (20, 28), is disclosed. For each of the front-end and back-end AGC functions (... | 10/28/2008 |
| 7391474 | Display interface systems and methods Display interface embodiments are provided to capture various types of analog video signals and digitize them for presentation on advanced digital displays (e.g., computer displays and television displays). The embodiments include at least an error converter channel... | 06/24/2008 |
| 7382414 | Video signal processing apparatus, for controlling contrast compensation and edge compensation in relation to each other in depedence on luminance of an image, and television receiver including the same A video signal processing apparatus includes a characteristic detection circuit for detecting luminance distribution corresponding to one frame of a video signal, a contrast compensation circuit for compensating contrast of the video signal, an edge compensation cir... | 06/03/2008 |
| 7362908 | Adaptive generation of Q-table2 for improved image quality Brightness correction and image enhancement are derived to compensate for changes in captured image data by hardware scanners and the like by statistically measuring the captured data and generating or selecting a compensation quantization table to be substituted in... | 04/22/2008 |
| 7362290 | Image signal correcting circuit, image processing method, electro-optical device and electronic apparatus To provide a circuit for preventing degradation of a display quality caused by horizontal crosstalk. An image signal correcting circuit supplies a corrected image signal to a display panel to apply the image signal using the corresponding data line after pre-chargin... | 04/22/2008 |
| 7362382 | Automatic gain control circuitry To provide an automatic gain control circuitry which effectively works for a video signal of which pedestal level in an effective video period is different from the pedestal level in the vertical blanking period. The automatic gain control circuitry comprises a firs... | 04/22/2008 |
| 7362915 | Method for enhancing the contrast of an image The contrast of an image is enhanced by converting pixels of detail images of a multi-scale digital representation of the image according to a conversion function. The conversion function is monotonically increasing and odd and provides maximum amplification within ... | 04/22/2008 |
| 7358940 | Electro-optical device, circuit for driving electro-optical device, method of driving electro-optical device, and electronic apparatus There is provided a circuit for driving an electro-optical device having a precharge voltage generating circuit. The precharge voltage generating circuit has a subtracter for obtaining a difference between a gray scale level of each of pixels which is disposed along... | 04/15/2008 |
| 7359573 | Contrast compensation apparatus and method thereof A contrast compensation apparatus and a method thereof utilize a simplified hardware structure and a low contrast distortion. The contrast compensation apparatus includes a pixel value detection unit to detect a distribution of pixel values of respective pixels of a... | 04/15/2008 |
| 7358801 | Reducing noise and/or power consumption in a switched capacitor amplifier sampling a reference voltage Equal common mode voltage is present at the input terminals of an operational amplifier with amplifies the residue signal in a stage of an ADC in two phases while reducing the noise introduced into the amplified signal. A reference capacitor is coupled between an in... | 04/15/2008 |
| 7358994 | Image processing apparatus, image processing method, recording medium thereof, and program thereof In image processing apparatus and method for displaying and printing a person image photographed by a digital camera, it is possible to automatically correct image data and output the person image of an optimum characteristic. In this apparatus, an image obtaining p... | 04/15/2008 |
| 7355656 | Video signal processing device and television receiving device A video signal processing device is provided comprising an input level detecting circuit for detecting an amplitude of a video signal to be processed and an analog/digital converter for performing analog/digital conversion of the video signal using as a reference vo... | 04/08/2008 |
| 7352412 | Miniaturized television tuner and television receiver including the same A television tuner includes an IF output terminal for outputting an IF signal converted from a received television signal to an external source, and a channel-selection PLL circuit for converting a high voltage supplied from an external source to a tuning voltage an... | 04/01/2008 |
| 7352352 | Liquid crystal display device and controlling method thereof The liquid crystal display device includes a histogram analyzer analyzing a histogram of an input image and determining the input image as being in one of a low brightness mode, a normal mode, and a high brightness mode based on the histogram analysis, a back light ... | 04/01/2008 |
| 7352406 | Signal acquisition following transient signal interruption A television monitor display with video signal processing comprises a source (SM) of a video display signal (Y) including a sync component (S). A video processor (U1) is coupled to process the video display signal (Y). A sync separator (SS) is coupled to gene... | 04/01/2008 |
| 7345712 | Display apparatus A display apparatus to receive a picture signal containing information of a picture and to process the picture signal using at least an area distinguishing the picture from another picture includes a motion detector to detect whether there is a motion in the area of... | 03/18/2008 |
| 7327384 | Gamut false color display A gamut error false color display uses false coloring on a monochrome image of a video picture being tested. Composite and component gamut error signals are extracted from an input video signal representing the video picture being tested. Such error signals may repr... | 02/05/2008 |
| 7324162 | Method and apparatus to improve ADC dynamic range in a video decoder A video decoder in which 1) resolution quality can be improved for a given bit count analog-to-digital converter, 2) a lower bit count analog-to-digital converter can be used with substantially similar quality or 3) a combination of improved resolution quality with ... | 01/29/2008 |
| 7324165 | [Automatic contrast limiting circuit and method thereof with spatial domain infinite impulse response filter] An automatic contrast limiting circuit and method thereof with spatial domain infinite impulse response filter are disclosed. A spatial domain infinite impulse response filter is adapted to generate an output value of the spatial domain infinite impulse response fil... | 01/29/2008 |
| 7321686 | Image processing apparatus and method for improving the contract of an image Processing for improving the contrast of an image of interest is executed by an image processing circuit in an X-ray photography apparatus. The image is decomposed into coefficient values of a plurality of frequency bands by a frequency-component decomposition circu... | 01/22/2008 |
| 7319787 | Automatic contrast enhancement A method of automatic contrast correction comprises providing digital image data, representing the data in the form of a brightness histogram, determining a measure of central tendency for said histogram, adding a shift value to the measure of central tendency to pr... | 01/15/2008 |
| 7317493 | Method and apparatus for providing dual automatic gain control delay settings in a television receiver The present invention provides a method and apparatus for processing a received television signal comprising one of a first type of television signal and a second type of television signal. Specifically, the method comprises amplifying the received television signal... | 01/08/2008 |
| 7312733 | Semiconductor apparatus with an analog-to-digital converter and amplifier A semiconductor apparatus includes an amplifying unit, a bias controlling unit, an AD converting unit and a controlling unit. The amplifying unit is configured to amplify an input signal to output an amplified signal. The bias controlling unit is configured to gener... | 12/25/2007 |
| 7304686 | On-screen display signal processing device An on-screen display (OSD) signal generating circuit which provides an analog output is utilized for realizing on-screen display of a digital display device and providing stable operations and signals. An OSD signal processing device has an OSD signal generating cir... | 12/04/2007 |
| 7302110 | Image enhancement methods and apparatus therefor The invention relates to methods, devices and computer programs for processing images. The dynamic range of an image is adjusted to allow more detail in the original image to be reproducible, whilst preserving the natural look of the image. Improvements to lossy dat... | 11/27/2007 |
