Class 348/539 - Color

Subclass of Class 348 - Television
Definition: Subject matter wherein the sync signal components are for
No. of patents: 70
Last issue date: 06/24/2008

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Number	Title	Issue Date
7391472	System and method for adaptive color burst phase correction We describe and claim an adaptive color burst phase correction system and method. The adaptive color burst phase correction system includes a signal detector to extract a color burst from a video signal, the color burst including a phase and an amplitude, an adaptiv...	06/24/2008
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
7327400	Automatic phase and frequency adjustment circuit and method The invention is a circuit and method for automatically adjusting the phase and frequency of a pixel clock derived from analog image data. The circuit includes a phase locked loop circuit adapted to generate a phase locked loop clock responsive to a reference signal...	02/05/2008
7263646	Method and apparatus for skew compensation A method that measures a skew between a data signal and a clock signal at a receiving end of a serial link and then adjusts a phase relationship between the data signal and the clock signal to reduce the skew. ...	08/28/2007
7221727	All-digital phase modulator/demodulator using multi-phase clocks and digital PLL Multi-phase clocks are used to encode and decode signals that are phase-modulated. The input signal is phase-compared with a feedback clock. Phase differences increment or decrement an up/down counter. The count value from the up/down counter is applied to a phase r...	05/22/2007
7167208	Digital broadcasting receiver and method for compensating color reproduction error of the same Digital broadcasting receiver, and method for compensating a color reproduction error therein, the digital broadcasting receiver including a channel decoder, a TP part for demultiplexing a TP stream from the channel decoder for being provided with a PCR (Program Clo...	01/23/2007
7136109	Self-adjusting pixel clock and method therefor A pixel clock generating circuit is provided in which a digital circuit generates a first signal corresponding to the relative frequency of the pixel clock as compared with a predetermined desired pixel clock frequency. An analog circuit is electrically coupled to t...	11/14/2006
7123308	Video data correction capable of exactly correcting hue, chroma and/or luminance signal An angle calculation unit calculates an angle formed by color difference signals R-Y, B-Y of each input pixel. Correction gain calculation units use the angle as a parameter to generate correction gains of hue, chroma, luminance (Y) gamma, and chroma (C) gamma for o...	10/17/2006
7082171	Phase shifting applications of universal frequency translation A universal frequency translation module (UFT) frequency translates an electromagnetic (EM) input signal by sampling the EM input signal according to a periodic control signal (also called an aliasing signal). By controlling the relative sampling time, the UFT modul...	07/25/2006
7079717	Control circuit for IEEE 1394b optical transmission protocol An On-Off control circuit between the IEEE1394a and IEEE1394b compliant physical layer (PHY) output driver circuitry and the glass fiber optical physical medium dependent (PMD) sub-layer within the architecture of the IEEE 1394b standard addresses the stability issu...	07/18/2006
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
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
6927767	Picture display apparatus A picture display apparatus for displaying a picture in response to inputted picture signals of an arbitrary format. The apparatus includes a picture display unit having an arranged matrix of dots for picture display, a picture display unit drive for converting inpu...	08/09/2005
6924796	Dot-clock adjustment method and apparatus for a display device, determining correctness of dot-clock frequency from variations in an image characteristic with respect to dot-clock phase The frequency of the dot clock in an image display device is adjusted by calculating a first image characteristic from the differences between adjacent picture elements, varying the phase of the dot clock, determining whether the frequency of the dot clock is correc...	08/02/2005
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
RE38618	Method and apparatus for automatic pixel clock phase and frequency correction in analog to digital video signal conversion A method for producing a digital video signal from an analog video signal, the analog video signal including an analog video data signal that is raster scanned in lines across a CRT screen to form consecutive frames of video information, the raster scanning controll...	10/12/2004
6744472	Graphics display system with video synchronization feature A graphics integrated circuit chip is used in a set-top box for controlling a television display. The graphics chip processes analog video input, digital video input, graphics input and audio input simultaneously. The system includes a video decoder having a chroma-...	06/01/2004
6462789	Circuit and method for generating chrominance lock A digital video encoder (16) receives a reference clock signal (REF_CLK27) for determining both a short term and a long term phase correction factor. A pulse detector (46) determines a number of sample clock (CLK324) time periods between the reference clo...	10/08/2002
6449017	RGB self-alignment and intelligent clock recovery A clock-recovery system is used to align a clock-phase with the RGB-signals. A frequency-synthesizing loop is applied for receiving a reference clock signal (CKREF) to generate a synthesized frequency. A fine-tuned frequency-synthesizing loop then receive...	09/10/2002
6226045	Dot clock recovery method and apparatus The present invention overcomes the problem of image detail timing jitters in flat panel display devices by compensating for the phase difference between the dot clock derived by the Horizontal-sync signal and the display data. This is done by providing a...	05/01/2001
6052152	Digital carrier synthesis by counting cycles for synchronization to a reference signal that is asynchronous with respect to a digital sampling clock A periodic multi-bit digital signal is synthesized having a frequency that is specified by the frequency of a periodic reference signal that is asynchronous with respect to a sampling clock of the periodic digital signal. In a digital video system, for ex...	04/18/2000
6046776	Burst gate pulse generator A burst gate pulse generator generates a burst gate signal representative of a time period during which a burst signal is present within an input composite video signal. Each period of the input composite video signal includes a horizontal synchronization...	04/04/2000
6014176	Automatic phase control apparatus for phase locking the chroma burst of analog and digital video data using a numerically controlled oscillator A video/graphics overlay integrated circuit receives an analog composite video signal and a digital composite video signal and combines them in a predetermined format into an output composite video signal which is transmitted to a display device such as a...	01/11/2000
5844621	Burst gate pulse generator A burst gate pulse generator generates a burst gate signal representative of a time period during which a burst signal is present within an input composite video signal. Each period of the input composite video signal includes a horizontal synchronization...	12/01/1998
5838311	Method of sampling color signal Receiving an instruction designating a frequency f by an MPU (1), a programmable clock generator (2) generates a dot clock D which has the frequency f. The dot clock D and a horizontal synchronizing signal H having a cycle TH are supplied to a ...	11/17/1998
5808691	Digital carrier synthesis synchronized to a reference signal that is asynchronous with respect to a digital sampling clock A periodic multi-bit digital signal is synthesized having a frequency that is specified by the frequency of a periodic reference signal that is asynchronous with respect to a sampling clock of the periodic digital signal. In a digital video system, for ex...	09/15/1998
5786866	Video color subcarrier signal generator A color subcarrier signal generator for use e.g, in a video converter measures the average error of the horizontal synchronizing signal frequency. The measured error is used as a compensator signal to control a direct digital synthesizer to generate a cor...	07/28/1998
5767915	Digital color burst phase switch for pal video systems A digital color burst phase switch for determining phase shift of a color burst signal in a PAL video signal includes a phase selector for selecting either a first reference clock or a second reference clock in response to a PAL switch signal. A phase del...	06/16/1998
5638131	Method to synchronize video modulation using a constant time base Successive pixels representing video data in successive lines in a raster scan are buffered. Each of the lines has a sync pulse defining the line beginning. A phase adjustment is determined between the sync pulse, preferably at a particular level in the s...	06/10/1997
5532757	APC and ACC processing using common circuitry Chrominance signals of a digitized composite video signal are processed by including automatic phase control and automatic chroma control operations that use circuit elements that are concurrently available for both operations as well as for other signal ...	07/02/1996
5459524	Phase modulation demodulator apparatus and method This invention is for a reference generator and demodulator for recovering information which has been phase, modulated on (or encoded on) a carrier. The inventive concepts described herein include a novel reference measurement circuit including a sampler ...	10/17/1995
5404173	Method to synchronize video modulation using a constant time base Successive pixels representing video data in successive lines in a raster scan are buffered. Each of the lines has a sync pulse defining the line beginning. A phase adjustment is determined between the sync pulse, preferably at a particular level in the s...	04/04/1995
5404230	Color burst phase correcting color signal reproducing circuit A color signal reproducing circuit comprising a phase correction device receiving a gain-controlled composite color signal, detecting color burst signal in a composite color signal and correcting phase of the color burst signal by using a 3.58 MHz signal,...	04/04/1995
5394197	Low-band conversion chrominance signal processing apparatus and method therefor A chrominance signal processing apparatus, where a chrominance subcarrier and a low-band converting chrominance subcarder are formed, uses a common oscillating signal to form the low-band converting chrominance subcarrier. The low-band converting chromina...	02/28/1995
5355172	Method and apparatus for sampling a reference signal A method and an apparatus for sampling a reference signal so as to generate an error signal indicative of a phase error between an actual sampling phase and a desired sampling phase. The desired sampling phase is displaceable from an optimum sampling phas...	10/11/1994
5339112	Automatic phase controlling circuit for processing reproduced chroma signals A low range chroma signal reproduced from a recording medium is converted in the frequency by a frequency converter to obtain an original carrier chroma signal, then the carrier chroma signal is passed through a comb filter for removing a crosstalk and is...	08/16/1994
5150201	Digital television-signal-processing circuit with orthogonal output clock A digital television-signal-processing circuit for a composite color signal is sampled with a first clock signal. The digitized composite color signal is reconverted with a line-locked second clock signal. The two clock signals have the same frequency. A ...	09/22/1992
4897713	Color television signal decoding circuit In a color television signal decoding circuit having a first phase-locked loop comprising a color synchronizing signal phase detection circuit (9) for a first digital oscillator (15) which supplies reference signals for demodulating a digital chrominance ...	01/30/1990
4841357	Data compander for digital video signals A data compander for digital video signals wherein the sampling frequency is locked to the chrominance-subcarrier frequency. The data compander includes the following cascaded subcircuits: a lock-mode-changing filter which changes the lock of the video si...	06/20/1989
4797730	Method and apparatus for controlling the sampling phase of an analog color television signal A composite analog video signal is sampled at precise locations relative to the phase of the unmodulated color subcarrier along each horizontal line of the video signal. This provides a digitized signal with a constant phase relationship relative to the u...	01/10/1989

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Class 348/539 - Color