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| Number | Title | Issue Date |
| 7576771 | Method and apparatus of providing video synchronization Video control signals are received at a video input port of a system. A determination is made whether the video control signals are valid or invalid. When video control signals represent a valid video signal, providing a delayed representation of a control signal to... | 08/18/2009 |
| 7489338 | Automatic color-sync polarity control A system and method for automatically controlling color synchronization polarity during video decoding. Various aspects of the present invention may comprise at least one module that is adapted to monitor color synchronization polarity at a plurality of instances ov... | 02/10/2009 |
| 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 |
| 7425991 | System and method for determining video subcarrier phase A system and method for determining phase of a subcarrier (e.g., a jittering video subcarrier). Various aspects of the present invention may comprise determining at least one weighting factor based, at least in part, on a subcarrier synchronization signal (e.g., a v... | 09/16/2008 |
| 7391836 | System and method for synchronous clock re-generation from a non-synchronous interface A system and method transmits data received at varying frequencies at a fixed data rate. The frequency dependent data and associated data clock signal are received and the frequency dependent data is converted to frequency independent data. A ratio of a number of da... | 06/24/2008 |
| 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 |
| 7349009 | Vector waveform correction device A phase shifter (70) for correcting the phase of a sub-carrier signal input into a decoder to a burst signal has a phase shift setting (5), a correction amount setting (9′), a phase shifter (6) and a 90-degree phase shifter (7). ... | 03/25/2008 |
| 7333131 | Digital video apparatus capable of detecting its status of connection to peripheral apparatus A method and apparatus of detecting a connection status of a digital video apparatus to a peripheral apparatus includes a digital video encoder configured to receive a digital video signal, and convert and output the digital video signal into an analog video signal,... | 02/19/2008 |
| 7333150 | Method, system, and program product for eliminating error contribution from production switchers with internal DVEs Measurement of the relative timing between images and associated information, for example video and audio. Image mutual event characteristics are recognized in the images and associated mutual event characteristics are recognized in the associated information. The i... | 02/19/2008 |
| 7321397 | Composite color frame identifier system and method A color frame identifier circuit generates a pseudo-subcarrier signal and compares the pseudo-subcarrier signal to a sliced color burst of at least one selected line in a video frame. Based on this comparison, a processing circuit determines the color frame. ... | 01/22/2008 |
| 7298418 | Method and system for processing in a non-line locked system Certain embodiments of the invention disclose a method and system for processing in a non-line locked system. The phase relationship between the sub-carrier signal on consecutive video lines in a video comb filter is determined by synchronizing the two video lines. ... | 11/20/2007 |
| 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 |
| 7277133 | Adjusting pixel clock A pixel clock frequency is adjusted in response to periodically monitoring the relative positions between a video signal to be displayed and a video signal captured. Image shear of the display signal may be avoided quickly. Adjustments are made to the color burst si... | 10/02/2007 |
| 7268827 | Circuit for transferring a timing signal between circuits having different clock frequencies A timing signal transferring circuit (10) that may be arranged to stably transfer a timing signal (S1) between two video signal processing circuits that may operate at different clock frequencies has been disclosed. A first timing signal (S1) ma... | 09/11/2007 |
| 7253756 | Method and device for dynamically accelerating analog-to-digital converter A method and a device for dynamically accelerating an analog-to-digital converter (ADC) are provided. The device for dynamically accelerating ADC is capable of detecting the sampling frequency and controlling the maximum conversion rate by boosting the current into ... | 08/07/2007 |
| 7253842 | Locking display pixel clock to input frame rate To match the output frame rates to the input frame rates, a display clock signal is generated that has a frequency locked to the frequency of a reference clock signal. To generate the display clock signal, the period of the vertical incoming data clock is measured u... | 08/07/2007 |
| 7250980 | Automatic detection of sync polarity in video timing and generation of blanking period indicator from sync information The present invention relates to a system and method for generating a blanking period indicator signal from sync information in video timing. The invention comprises an auto polarity detect processor adapted to automatically detect the polarity of at least one sync ... | 07/31/2007 |
| 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 |
| 7116959 | Apparatus for selecting a receiver among a plurality of receivers in a diversity receiver system based upon automatic gain correction A diversity receiver system includes a plurality of radio receivers that each provide a uniquely associated receiver output signal and a uniquely associated receiver control signal indicative of the amount of gain applied by the associated radio receiver to create t... | 10/03/2006 |
| 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 |
| 7027102 | Software decoding of composite video without a phase-locked loop A software decoder for converting standard composite video to RGB color components without a phase-locked loop. Subcarrier phase recovery for each video line is accomplished by performing a single DFT computation on the color burst samples for the frequency closest ... | 04/11/2006 |
| 6985174 | Dynamic radio frequency interference detection and correction A system and method providing dynamic detection and correction of data corrupted by external interference in wireless communications network includes an interference detection unit and correction unit. Detection unit detects impact on video signals based on measurin... | 01/10/2006 |
| 6975349 | Two-dimensional video timing display A two-dimensional video timing display with numeric readouts allows a user to quickly, easily and precisely measure the timing difference between video signals. A graphic display area within a raster display region provides a two-dimensional display of vertical timi... | 12/13/2005 |
| 6958771 | Image processing apparatus working in response to frequency diffused clock as reference input image signals A system clock generation module varies an oscillation frequency and outputs a frequency diffused clock as a system clock. A synchronizing signal measurement module measures a synchronizing signal characteristic value, which includes at least a synchronizing signal ... | 10/25/2005 |
| 6952237 | Apparatus and method for transmitting audio over a dedicated video line Disclosed is a method and apparatus for transmission of audio signals over a dedicated video transmission line in which the analog audio signal is inserted into and becomes a part of the video signal. Samples of the audio signal are inserted into the active video li... | 10/04/2005 |
| 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 |
| 6943844 | Adjusting pixel clock A pixel clock frequency is adjusted in response to periodically monitoring the relative positions between a video signal to be displayed and a video signal captured. Image shear of the display signal may be avoided quickly. Adjustments are made to the color burst si... | 09/13/2005 |
| 6894727 | Picture transmission apparatus, a picture transmission method and a recording medium, and a picture transmission program Providing picture transmission apparatus, a picture transmission method and a recording medium, and a picture transmission program that can transmit the latest picture data in real time depending on the situation of the network bandwidth. The aforementioned picture ... | 05/17/2005 |
| 6882360 | Method and apparatus for determining a level of a video signal A method for estimating a level of a predetermined portion of a video signal comprising the steps of determining a location of the predetermined portion of the video signal, sampling the video signal during the predetermined portion and estimating the level as an av... | 04/19/2005 |
| 6839092 | Feed forward error correction in video decoder In accordance with an embodiment of the present invention a microprocessor in the horizontal phased lock loop reads the horizontal timing with respect to the sync input and provides an increment inch to the horizontal discrete time oscillator to make corr... | 01/04/2005 |
| 6801246 | Method and apparatus for detecting change in video source material A signal processing method and apparatus in which a horizontal and/or vertical synchronizing signal related to a received video signal is monitored to determine if a relatively large change has occurred in the respective vertical and/or horizontal time period such t... | 10/05/2004 |
| 6741289 | Technique to stabilize the chrominance subcarrier generation in a line-locked digital video system A technique to stabilize subcarrier generation in a line-locked digital video system, caused by simultaneous locking of the genlock device causing continuous changing of a shared clock signal, by calculating a time shift occurring in an output waveform, converting t... | 05/25/2004 |
| 6608646 | Method and device for detecting and correcting a malfunction of a horizontal/vertical processor used in an image display device A method for detecting and correcting an error of a device in which a malfunction of a horizontal/vertical processor used in an image display device is detected and corrected. A microcomputer initializes the horizontal/vertical processor, determines wheth... | 08/19/2003 |
| 6606410 | Method and apparatus for detecting a synchronous signal A method for detecting a synchronous signal contained in an input image signal is provided. In the method, horizontal and vertical periods are established during which horizontal and vertical synchronous signal pulses contained in the input image signal a... | 08/12/2003 |
| 6587139 | Device for measuring period of synchronizing signal and display device Disclosed is a period measuring device comprising a clamping circuit to which a synchronizing signal in an input image signal is inputted, a comparator for removing noise in the synchronizing signal outputted from the clamping circuit, period measuring ci... | 07/01/2003 |
| 6487719 | Method and apparatus for monitoring TV channel selecting status A monitoring apparatus connected to a TV set selects, from a plurality of internal sources, such as VHF/UHF and BS tuners and built in said TV, and a plurality of external sources connected to the TV set from the outside thereof, such as a CATV tuner and ... | 11/26/2002 |
| 6441847 | Method for determining the quality of a video and/or television image signal The invention concerns a method for determining the quality of a video and/or television image signal. In diversity reception installations comprising several receivers, it is necessary to establish a criterion for assessing the reception signals, so as t... | 08/27/2002 |
| 6441658 | Method and apparatus for vertically locking input and output signals This invention describes a method and apparatus for vertically locking input and output video frame rates. The output vertical sync pulse is locked in phase with the input vertical sync pulse, regardless of the input format and frequency. The output resol... | 08/27/2002 |
| 6366314 | Method and system for measuring the quality of digital television signals The invention relates to a method and to a system for measuring the quality of digital television signals comprising a data stream, the method including measuring quality and producing measurement signals that are representative of quality. The method com... | 04/02/2002 |
| 6310646 | Method and apparatus for measuring a radio frequency signal having program information and control information Disclosed are method and apparatus which measure signal level of an RF signal. The measured RF signal includes a baseband signal modulated onto a first carrier signal having a first frequency and the baseband signal includes program information and contro... | 10/30/2001 |
