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| Number | Title | Issue Date |
| 8184207 | Image signal input circuit An image signal input circuit includes an input terminal configured to receive an image signal, a clamp circuit configured to hold a sink chip voltage contained in the image signal to be a constant value, a level shift circuit that includes a first emitter follower ... | 05/22/2012 |
| 7468760 | Apparatus and related method for level clamping control A level clamping control circuit and associated level clamping control method are provided. The level clamping control circuit includes a reference level estimator, a subtractor, a clamping computation circuit, a dithering circuit, and a digital-to-analog converter ... | 12/23/2008 |
| 7365798 | Video signal identification device and video signal identification method The procedure of the invention acquires a maximum RB value, which is a largest value of an R signal component and a B signal component, on the assumption that the signal format of an input video signal is an RGB signal, and obtains an RGB probability corresponding t... | 04/29/2008 |
| 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 |
| 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 |
| 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 |
| 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 |
| 7071977 | Solid-state image sensing device When a signal output by a solid-state image sensing device is clamped to a predetermined reference potential, a high voltage generated in a transfer suspension period after the clamping as generally supplied to an A/D converter is generated. A sample/hold output Va ... | 07/04/2006 |
| 7050098 | Signal processing apparatus and method, and image sensing apparatus having a plurality of image sensing regions per image frame In processing an image signal output from an image sensing unit which includes a plurality of image sensing regions constructing one frame and a plurality of output terminals in one-to-one correspondence with the plurality of image sensing regions, and which outputs... | 05/23/2006 |
| 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 |
| 6970052 | Modulator immune from temperature variation-induced change in modulation factor A modulation factor is kept immune from the influence of temperature variation. A modulator is provided with an operational amplifier to one of whose input ends are inputted video signals and to the other is applied a reference voltage and a video mixer into which a... | 11/29/2005 |
| 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 |
| 6888889 | Image information conversion apparatus and image information conversion method The system provides an image information conversion apparatus and method by which picture quality deterioration caused by conversion from inputted MPEG2 image compression information into MPEG4 image compression information to be outputted is prevented. When an I pi... | 05/03/2005 |
| 6738098 | Video amplifier with integrated DC level shifting A method and apparatus within a television receiver for electronically aligning signals within the receiver by controlling support circuitry for an IF module. A video amplifier is coupled to an output of the IF module. A control voltage source (DAC 114) contr... | 05/18/2004 |
| 6529248 | Method and apparatus for improved signal restoration A method and/or apparatus is capable of performing high accuracy digital level restoration with a high degree of noise immunity provided by a passive clamping stage.... | 03/04/2003 |
| 6339435 | Device to automatically adjust video signals to a blanking level and method therefor A device to automatically adjust video signals to a blanking level to realize a precise intended color by being fed back with video signals at the blanking level stored in an ASIC (application-specific integrated circuit), which stores video signals at a ... | 01/15/2002 |
| 6226037 | AKB interface circuit for kine driver IC An AKB interface apparatus in a display system (10), includes a video signal processing IC (12) having outputs coupled via respective kinescope driver ICs (18,20,22) to respective kinescope cathodes (K1,K2,K3) for display of a color image, the signal proc... | 05/01/2001 |
| 6204892 | Circuit for clamping pedestal signal A clamping circuit with a low-pass filter inserted in a feedback loop from an output terminal of a comparator to variable current sources for obtaining a feedback signal having only a DC component or having only a substantial portion of a DC component obt... | 03/20/2001 |
| 6154256 | Sync separator and video signal detector circuits A symmetrical clamp clamps the input video signal to a reference voltage during composite sync pulses, so the coupling capacitor discharge current is kept small between composite sync pulses. For startup, the non-symmetrical clamp employs an operational a... | 11/28/2000 |
| 6008864 | Composite video signal backporch soft-clamp system using servo loop A backporch soft-clamp circuit using a servo loop clamps the blank or DC level of a composite video signal to a known value without altering the other components of the signal. The values of the components of the composite video signal are determined by d... | 12/28/1999 |
| 5995166 | Clamp circuit for clamping a video signal and a circuit for superimposing composite video signals The present invention provides a clamp circuit for clamping a video signal which includes a sync tip clamp circuit, a pedestal clamp circuit, and a direct current electrical potential correcting circuit. The sync tip clamp circuit clamps a sync tip of the... | 11/30/1999 |
| 5875002 | Clamp pulse circuit A clamp pulse generating circuit comprising a synchronizing decision circuit for deciding whether an external synchronizing pulse is being input or not; an exclusive-OR circuit, a change-over switch and a pulse width detecting circuit for deciding whether... | 02/23/1999 |
| 5864371 | Luminance signal generation circuit with single clamp in closed loop configuration and horizontal synchronization pulse generation A luminance signal generation circuit with single clamp and horizontal synchronization pulse generation circuit generates a separate luminance video signal Y, representing RGB input signals, and having a horizontal synchronization pulse. During a burst pe... | 01/26/1999 |
| 5841488 | Multiple video input clamping arrangement An apparatus having a selectable first mode of operation for clamping an input signal to a first reference level and a selectable second mode of operation for clamping a signal derived from the input signal to a second reference level.... | 11/24/1998 |
| 5760844 | Video signal data and composite synchronization extraction circuit for on-screen display A signal voltage level dual clamping circuit is disclosed for use in a receiving circuit for extraction of timing information from a signal. A first, start-up voltage level clamp is provided, the operation of which is independent of the signal timing info... | 06/02/1998 |
| 5708482 | Image-signal clamping circuit for electronic endoscope An image-signal clamping circuit processes image signals obtained from a solid state image sensor provided at a distal end of an electronic endoscope which do not have a direct-current component to restore a direct-current component thereof. The clamping ... | 01/13/1998 |
| 5686801 | Cathode current detecting method and detecting circuit capable of correctly detecting cathode current by clamping leak current at 0 V A cathode current detecting method wherein both a highlight detection pulse used to detect a white component and a cutoff detection pulse used to detect a black component are input to a signal input unit, and a cathode current flowing through a cathode is... | 11/11/1997 |
| 5677742 | Apparatus and method for displaying a clamp point The apparatus for displaying a clamp point on a screen includes an input amplifier; a clamp circuit which includes a sync separation circuit and a one shot; and a blanking circuit. The video signal is applied to the clamp circuit via the input amplifier a... | 10/14/1997 |
| 5532758 | Feedback clamp circuit for analog-to-digital conversion An image processing apparatus includes an analog image signal clamp and an A/D converter that converts the analog image signal into an m bit digital signal. The clamp is controlled in accordance with an n+1 (m>n) bit digital image signal converted by the ... | 07/02/1996 |
| 5510854 | Device for adjusting the black level of a video signal A device for adjusting a video signal so that its black level is in coincidence with a predetermined reference level includes a capacitor having a first terminal that receives the video signal and a second terminal that provides the adjusted video signal,... | 04/23/1996 |
| 5510855 | Satellite television broadcasting receiver including improved clamping circuit The present invention relates to a satellite television broadcasting receiver which receives waves from a satellite, selects a broadcasting channel and obtains an FM demodulated video signal by passing a selected signal through the band-pass filter. In th... | 04/23/1996 |
| 5508749 | Sag compensation circuit for a video signal A first clamp circuit clamps a tip of a synchronization signal of input video signal in accordance with a synchronization signal generated from a synchronization signal generator and outputs a clamped video signal. A level detector detects a level of a ti... | 04/16/1996 |
| 5483295 | Adaptive clamping circuit for video signal receiving device An adaptive clamping circuit for a video signal processing device includes a control signal generator for generating a control signal capable of controlling a speed of clamping operation in an input signal provided to the video signal processing device, a... | 01/09/1996 |
| 5448306 | Image processing apparatus with variable clamping Image processing apparatus wherein the level of an input analog picture signal from an imaging device is controlled by gain control circuitry, and the gain-controlled analog signal is then converted into a digital signal. Feedback clamping is performed by... | 09/05/1995 |
| 5446505 | Color television system having broadcast program adaptive video/audio adjustment apparatus Automatically fine tuned pictures and sounds can be obtained from a novel color television system having a video/audio signal adjusting circuit, a remote controller operable for generating a program mode selection signal, a memory having a plurality of me... | 08/29/1995 |
| 5438558 | Image signal apparatus including clamping processing of image signal An image signal recording and reproducing system for recording an image signal on a recording medium and for reproducing the image signal recorded on the recording medium is arranged to perform a reproducing action on the recording medium on which a sampl... | 08/01/1995 |
