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| Number | Title | Issue Date |
| 8144250 | Microcontroller-based multi-format video AGC/sync loop regulator A microcontroller-based video AGC/sync regulator in which the parameters of various synchronizing signals of several different video formats are incorporated into a user program to generate signals to be processed by other sub circuits that correct and reinforce the... | 03/27/2012 |
| 7499105 | Compensation circuit for frequency filters The invention relates to a compensation circuit for filters of a video signal receiver. To compensate a non-linear amplification of a small signal in dependence upon the control of a large signal which is superimposed on the small signal, the invention proposes to d... | 03/03/2009 |
| 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 |
| 7426250 | Automatic gain controller and controlling method thereof An automatic gain controller and the controlling method thereof are disclosed. The automatic gain controller includes a first multiplexer for receiving an input signal and a gain and generating a first output, a second multiplexer for receiving a signal time constan... | 09/16/2008 |
| 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 |
| 7340760 | Advertisements in an end-user controlled playback environment This invention discloses a method for displaying advertisements transmitted to a user unit, the method includes receiving, at the user unit, at least one advertisement tagged with a delay tag indicating whether display of the at least one advertisement can be delaye... | 03/04/2008 |
| 7227915 | Receiver and AGC method A receiver receives a multiplex broadcasting wave of a terrestrial wave and a satellite wave and executes AGC. As for the terrestrial wave, only a frequency band of the terrestrial wave is extracted by a filter for the terrestrial wave, and the AGC on the terrestria... | 06/05/2007 |
| 7206030 | Fast-convergence two-stage automatic gain control (AGC) Disclosed are methods and systems for automatic gain control (AGC) in circuits. The disclosed methods and systems provide accurate and rapidly converging automatic gain control suited for video applications. According to disclosed preferred embodiments of the invent... | 04/17/2007 |
| 7117514 | Multi-tuner television receiving apparatus and method of restricting the viewing A process and network able to restrict a video appliance equipped with either a single tuner or with multiple tuners, from receiving and subsequently displaying video image signals represented by an accompanying broadcast discretionary control data to include a high... | 10/03/2006 |
| 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 |
| 6977692 | Alternative video sync detector A circuit for generating video synchronization timing signals includes a negative peak detector (FIG. 5) for following variations of a composite video signal (FIG. 1), rather than clamping the most negative voltage of the composite video signal. The ne... | 12/20/2005 |
| 6947060 | Image forming apparatus, electron beam apparatus, modulation circuit, and image-forming apparatus driving method An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance... | 09/20/2005 |
| 6943828 | Method and apparatus for providing adaptive horizontal sync detection A method and apparatus for providing adaptive horizontal synchronization (sync) signal detection to identify whether a high quality television signal is being received by a television set. The method determines whether no signal is applied, whether a weak signal is ... | 09/13/2005 |
| 6882684 | Automatic gain control circuit, data communication device and automatic gain control method An automatic gain control circuit includes a first portion which calculates a first error amount, and a second portion which calculates a second error amount. Both calculated error amount is sent to a determination module. Further, an integrator integrates an error ... | 04/19/2005 |
| 6469748 | Video signal capturing apparatus In a video signal capturing apparatus with a simple construction capable of distinguishing fields in units of a color field, a separation circuit separates from input video signals, vertical synchronizing signals that lead fields in a one-to-one relations... | 10/22/2002 |
| 5889421 | Device for detecting the locking of an automatic gain control circuit The present invention relates to a device for detecting the locking of an automatic gain control circuit, the automatic gain control circuit receiving a signal to be regulated, a check signal and a sampling control signal for driving the operation of the ... | 03/30/1999 |
| 5867222 | Video sync signal slicing using variable gain control A video sync slicing circuit is disclosed that employs an adjustable gain control (AGC) amplifier and circuitry that adjusts a gain of the AGC amplifier such that a blanking level of the video signal at an output of the AGC amplifier equals a blanking ref... | 02/02/1999 |
| 5841563 | Method and system for efficient optical transmission of NTSC video A technique for delivering analog video over fiber-to-the-home (FTTH) networks addresses a fundamental problem of the standard signal format, i.e., power budget constraint, by increasing the usable optical signal efficiency. In particular, a technique is ... | 11/24/1998 |
| 5767914 | Video frame grabber comprising analog video signals analysis system In a video frame grabber for digitizing analog video signals which have a pure analog video signal component and a synchronisation signal component, the synchronisation signals are digitized along with the pure analog video signals. Video gain and offset,... | 06/16/1998 |
| 5489946 | High speed sync separation system and method A synchronization (sync) separation system and method quickly and accurately generate a sync signal from an analog video signal by using feedback control. The system comprises a voltage generator for generating first and second reference voltages VRE... | 02/06/1996 |
| 5459526 | Programmable sync reproducing circuit capable of processing multi-sync signals An image signal processing apparatus wherein image signals of plural kinds transmitted in different TV systems can selectively be reproduced, to provide an image signal processing apparatus wherein image signals of plural kinds transmitted in different sy... | 10/17/1995 |
| 5416524 | Digital television synchronization system and method A digital television signal includes data sent as multilevel symbols in successive data segments each including a synchronizing sync character. The detected synchronizing sync character produces a characteristic having two opposite polarity levels separat... | 05/16/1995 |
| 5210606 | Apparatus for correcting distorted sync in a composite video signal A television receiver includes a "one-chip" television signal processing IC which has a terminal for receiving a composite video signal including both image and synchronization pulse components. A composite video signal which has been non-linearly process... | 05/11/1993 |
| 5105272 | Synchronizing signal extracting apparatus A synchronizing extracting apparatus is for extracting a synchronizing reference signal suitable for a digital signal processing circuit from an input composite picture signal which includes a ternary synchronizing signal. The negative peak of the input c... | 04/14/1992 |
| 4520386 | Color video signal processing apparatus A color video signal processing apparatus which utilizes a digital luminance data and first and second color difference signals which are digitized at a first sampling frequency and formed by matrix operation wherein at least one of the first or second co... | 05/28/1985 |
| 4237487 | Monolithic semiconductor integrated circuit for television receivers A monolithic semiconductor integrated circuit for television receivers includes a video intermediate-frequency amplifier circuit, a video detector circuit and a sync separator circuit. The video intermediate-frequency signals are fed to said video in... | 12/02/1980 |
| 4157569 | Television receiver having a synchronous detection circuit and a frequency deviation-detection circuit to achieve a wide frequency range control function In a television receiver having a synchronous video signal detector from which a signal is obtained for controlling a function such as an automatic volume control or a synchronization signal separation, a correction signal, obtained by means of full-wave ... | 06/05/1979 |
| 4148068 | Television synchronizing signal separating circuit A television receiver has a tuner, an intermediate frequency amplifier, and a detector for recovering a composite signal including horizontal and vertical display synchronization components and picture information. Horizontal display means produce a long-... | 04/03/1979 |
| 4084187 | Circuit for accurately extracting the synchronization information contained within a composite video waveform A circuit for accurately extracting the synchronization information contained within a composite video waveform includes a means for establishing the back porch level of the waveform to a first voltage through a first feedback loop, a means for establishi... | 04/11/1978 |
