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| Number | Title | Issue Date |
| 7940335 | Video signal output circuit and electronic device using the same A video signal output circuit includes a sync-tip clamp circuit fixing a sync-tip level of an input video signal at a constant voltage, a low-pass filter receiving the video signal output from the sync-tip clamp circuit and eliminating a predetermined high-frequency... | 05/10/2011 |
| 7787056 | Apparatus and method for restoring DC spectrum for analog television reception using direct conversion tuners A DC compensation circuit restores the frequency spectrum of an input signal at DC (or 0 Hz) by removing or reducing DC offset, 1/f noise, or any other unwanted noise at or near 0 Hz. The DC compensation is performed using direct coupling, as opposed to AC coupling,... | 08/31/2010 |
| 7652723 | Composite video signal correction unit for video imaging and video recording systems In one embodiment, a signal processing system is provided that includes: (a) a video input 400 operable to receive a first analog video signal and remove the DC voltage offset component from the video signal to form a DC-adj... | 01/26/2010 |
| 7502077 | Device and method for processing video signals to improve the black contrast A video signal-processing device that can improve the apparent contrast of the luminance signal at a television receiving set includes a quantity of black expansion computing section for computationally determining the quantity of black expansion when the luminance ... | 03/10/2009 |
| 7423697 | Method and apparatus for AC coupling a signal while restoring DC levels A system in which drooping of the video levels due to leakage currents and proper DC bias level is addressed by providing a charge into the video signal to offset the leakage currents and to provide DC bias. To determine the leakage current level, measurements are m... | 09/09/2008 |
| 7408592 | Method and device for dynamically adjusting sync-on-green (SOG) signal of video signal The present invention discloses a method and a device for dynamically adjusting a sync-on-green (SOG) signal of a video signal, capable of extracting an SOG signal from an analog video signal so as to dynamically adjust the SOG signal in real-time so as to overcome ... | 08/05/2008 |
| 7358995 | Captured-image-signal processing method and apparatus and imaging apparatus An imaging apparatus includes a solid-state imaging device that outputs a captured image signal in current mode, which in turn is subjected to CDS processing in current mode by a current signal detector, thus suppressing FPN noise. A captured image signal output by ... | 04/15/2008 |
| 7327297 | Source driver of liquid crystal display and the driving method A source driver has many channels, and each channel has a DAC, a clamp circuit and a fine tune circuit. The DAC selects a first reference voltage and a second reference voltage from a plurality of gamma voltages according to (N−1) most significant bits of an N-bit... | 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 |
| 7295250 | Apparatus and method for restoring DC spectrum for analog television reception using direct conversion turners A DC compensation circuit restores the frequency spectrum of an input signal at DC (or 0 Hz) by removing or reducing DC offset, 1/f noise, or any other unwanted noise at or near 0 Hz. The DC compensation is performed using direct coupling, as opposed to AC coupling,... | 11/13/2007 |
| 7283157 | Automatic level control (ALC) for video signals Disclosed are methods and systems for automatic level control (ALC) in a video signal processing system. The new ALC of the invention takes into account the gain applied to the video signal, such as that provided by an associated automatic gain control (AGC). Method... | 10/16/2007 |
| 7250986 | External output video signal processor The object of the invention is offering an external output video signal processor, which does not need coupling capacitor or clamping circuit. A system controller outputs a video signal by which the sync. tip level and the pedestal level were fixed to a predetermine... | 07/31/2007 |
| 7239357 | Digital IF demodulator with carrier recovery A digital IF demodulator receives and demodulates an analog IF input signal to produce a digital audio signal and a digital video signal. The digital IF demodulator includes an A/D converter, a first digital complex mixer, a second digital complex mixer, and various... | 07/03/2007 |
| 7233365 | Digital DC restore methods and apparatus Digital dc restore methods and apparatus to restore the DC component of an analog waveform to a quantized reference value level at a given temporal point on a waveform, prior to an ADC. This may used to establish the relationship between the full scale digital value... | 06/19/2007 |
| 7227588 | Clamping system for clamping a video signal by using a charge-pump circuit A clamping system for clamping a video signal, wherein the clamping system uses a charge-pump unit in company with a digital clamping controller to clamp the potential of the video signal, prior to the video signal being input to a programmable gain amplifier and an... | 06/05/2007 |
| 7227918 | Clock data recovery circuitry associated with programmable logic device circuitry A programmable logic device (“PLD”) is augmented with programmable clock data recover (“CDR”) circuitry to allow the PLD to communicate via any of a large number of CDR signaling protocols. The CDR circuitry may be integrated with the PLD, or it may be wholl... | 06/05/2007 |
| 7205797 | Common mode detection and dynamic correction input circuit A single ended input circuit can receive an input signal and generate a correction voltage corresponding to a common mode voltage of the input signal. A comparison of the input signal can be adjusted in response to the correction voltage. In one arrangement, an inpu... | 04/17/2007 |
| 7184097 | On-screen display apparatus The present invention provides an on-screen display apparatus which can eliminate variations in the DC level at a time when an input chroma signal and an OSD chroma signal are switched, and prevent an erroneous display of color. The on-screen display apparatus of th... | 02/27/2007 |
| 7184099 | Controllable signal baseline and frequency emphasis circuit A circuit for selectively controlling signal baseline and frequency emphasis. An amplifier with selectively controllable feedback circuitry allows higher frequency components of a signal to be emphasized over lower frequency components while also allowing control ov... | 02/27/2007 |
| 7176985 | Clamping circuit for video signals An apparatus, system and method for clamping a video signal input to a coupling capacitor (215) for providing a clamping voltage. A charging current is applied to the capacitor (215) via an amplifier (225) having a first input (227) coupl... | 02/13/2007 |
| 7142254 | Self compensating video data amplifier and driver for broadcast data receiver The invention relates to improvements to the operation of a broadcast data receiver (BDR) and, in particular, to the provision of a video data amplifier and driver circuit for the processing of a received video data signal. The circuit includes a means for generatin... | 11/28/2006 |
| 7126645 | Back-porch clamp The invention teaches a method, means and apparatus for clamping a back porch interval of a video signal including clamping a sync-tip level of said video signal to a variable reference voltage, comparing a back-porch voltage level of the sync-tip clamped video sign... | 10/24/2006 |
| 7106387 | Keyed clamp circuit The keyed clamp circuit of this invention has the clamp circuit for clamping the video signal including the equalizing pulse and the vertical synchronization signal based on the clamp pulse, the synchronization signal separation circuit for separating the synchroniz... | 09/12/2006 |
| 7106231 | Video signal processing system including analog to digital converter and related method for calibrating analog to digital converter A video signal processing system capable of adjusting errors and related methods are introduced. The video signal processing system and related calibration methods utilize the characteristic of periodic breaks of video signals to perform various kinds of calibration... | 09/12/2006 |
| 7102693 | Data acquisition circuit which changes a range of a reference potential An A/D converter updates its reference potential so that it coincides with an analog potential of a video signal. The A/D converter changes a variable voltage range of the reference potential during the same horizontal synchronizing period based upon a horizontal sy... | 09/05/2006 |
| 7102698 | Method and apparatus for controlling brightness of image processing device A method and apparatus for controlling the brightness of an image processing device to improve a brightness characteristic of an image signal, by reducing a pedestal voltage range and correspondingly expanding a brightness control voltage range in a highlight mode. ... | 09/05/2006 |
| 7095452 | Clamp circuit for clamping a digital video signal A clamp control circuit outputs a clamp control signal after a delay of a predetermined time if a digital video signal is detected. A sampling circuit that extracts sampling data of a pedestal level from a luminance corrected signal based on a clamp pulse at a timin... | 08/22/2006 |
| 7092039 | Calibration device for a video input stage A calibration device for a video circuit input stage comprises an analog-to-digital converter and an input capacitor constantly discharged by a power source and recharged by a charging circuit by means of a first and a second charging current. The charging circuit i... | 08/15/2006 |
| 7086083 | Noise measurement system A method of determining noise in a CATV channel, wherein the CATV channel comprises a predetermined frequency band, that employs digital signal processing to isolate the noise signal from an in-service television signal. The method includes an initial step of obtain... | 08/01/2006 |
| 7075590 | Apparatus for providing television receiver alignment functions A method and apparatus within a television receiver for electronically aligning signals within the receiver by controlling support circuitry for an IF module. A control voltage source controls both video alignment and picture IF (PIF) mute functions. The DAC is coup... | 07/11/2006 |
| 7071994 | System and method for nondisruptively embedding an OFDM modulated data signal into a composite video signal A method and system for sending and receiving binary bit stream in a composite video signal, such as a NTSC signal. The binary bit stream is modulated according to quadrature amplitude modulation, converted to analog and translated to an intermediate frequency relat... | 07/04/2006 |
| 7053959 | Digital video encoder A mask circuit masks a digital video signal so that a video signal of an analog video signal is not outputted for a predetermined period after the start of output of a horizontal synchronizing signal of the analog video signal. A period of masking the digital video ... | 05/30/2006 |
| 7053960 | Systems and methods for adjusting image contrast Systems and methods for adjusting image contrast are provided. An exemplary method for adjusting image contrast includes determining a format of a television signal and outputting in conjunction with the television signal a reference level. If the television signal ... | 05/30/2006 |
| 7030936 | Pedestal level control circuit and method for controlling pedestal level In order to reduce a circuit scale such as a brightness adjustment circuit or the number of pins in an IC chip, in the brightness adjustment circuit, a brightness adjusted video signal (internal video signal) output from an analog signal synthesis circuit or a D/A c... | 04/18/2006 |
| 7023497 | Clamping circuit with wide input dynamic range for video or other AC coupled signals A clamping circuit disclosed herein has two modes of operation which include both a bottom level and mid-level clamping mode for clamping automatically onto the sync tip of a video signal and customizably clamping onto the front porch, back porch/pedestal or anywher... | 04/04/2006 |
| 6989870 | Video signal processing apparatus and method capable of converting an interlace video signal into a non-interlace video signal When converting an interlace video signal into a non-interlace video signal by interpolating a scanning line of the interlace video signal, black stretching is carried out with respect to the interpolated scanning line. Thereafter, black stretching is carried out wi... | 01/24/2006 |
| 6967691 | Color difference signal processing A color video display signal processor comprises a source of a color difference signal and an analog to digital converter for converting the color difference signal to a digital signal. A potential divider is coupled to reference voltages of the analog to digital co... | 11/22/2005 |
| 6965417 | Signal processor An object of the present invention is to provide a signal processor which improves the offset accuracy of a video signal without increasing the number of bits of a circuit. An N-bit adder (103) adds a video signal (S101) and an upper-N-bit signa... | 11/15/2005 |
| 6956621 | High impedance digital full line video clamp A circuit for clamping a TV signal includes an input capacitor coupled to the TV signal, an analog-to-digital converter that outputs a digital signal corresponding to TV signal, a comparator that compares the digital signal to a black level signal, and a high impeda... | 10/18/2005 |
| 6952235 | Apparatus and method for controlling black stretch of video signal An apparatus and method for adaptively varying a black stretch control range and a gain according to a mean level of a video signal to control black stretch of the video signal. According to the apparatus and method, the slope and range of black stretch are varied d... | 10/04/2005 |
