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7599006 |
Over-sampling A/D converting circuit
To provide an A/D converting circuit capable of improving an S/N ratio regardless of a color television system. An over-sampling A/D converting circuit according to an embodiment of the present...
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7515211 |
Video signal processing circuit, video signal display apparatus, and video signal recording apparatus
A video signal processing circuit that uses a prescribed clock signal to process a digitized composite video signal. A clock generating means ( 2 ) generates the prescribed clock signal; a burst...
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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...
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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...
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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...
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6462789 |
Circuit and method for generating chrominance lock
A digital video encoder ( 16 ) receives a reference clock signal (REF_CLK 27 ) for determining both a short term and a long term phase correction factor. A pulse detector ( 46 ) determines a number...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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4751565 |
Microprocessor controlled digital genlock
A digital phase-locked loop maintains a clock signal in a predetermined phase and frequency relationship with an input video signal having a repeating signal element, such as horizontal sync pulses...
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4682209 |
Digital chrominance processor with a phase and frequency controlled digital oscillator independent of the stable oscillator frequency
In a digital chrominance signal processing circuit for a chrominance signal which is sampled at a frequency equal to a number of times the chrominance subcarrier frequency, this frequency can be...
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4635103 |
Phase locked loop system incorporating automatic gain control
An automatic gain control (AGC) circuit is described in the context of a phase locking system in a digital television receiver. The signal produced by the phase locking system is used to develop a...
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4635097 |
Method and system for processing digital video signal incorporating phase-correction feature
A method and system for converting an analog video input signal into a digital video signal corrects for jitter and other spurious input frequency errors without the need for a time base correction...
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4633298 |
Digitally controlled phase locked loop system having coarse and fine locking modes
A phase detector included in a digital television receiver develops first and second phase error signals based on samples of the color reference burst signal taken from one and two horizontal lines...
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4611240 |
Chrominance processor control system
In a color TV receiver, a color AFPC loop, responsive to line rate synchronizing bursts of subcarrier frequency derived from the output of a first of a pair of cascaded chrominance signal...
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4598310 |
Circuit arrangement for obtaining a phase-sensitive control quantity, in particular in a color television receiver
A circuit arrangement for obtaining a control quantity which is dependent on the phase shift of a color burst signal comprising an amplitude factor with respect to a reference signal, preferably of...
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4558348 |
Digital video signal processing system using asynchronous a-to-d encoding
A digital TV receiver having an analog-to-digital converter which generates digital representations of the analog signal asynchronously relative to the color burst reference, includes open loop...
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4543600 |
Digital signal phase measuring apparatus as for a phase-locked loop
A phase measuring arrangement for sampled signals changes the phase of the sampling signal in fine phase increments while comparing the magnitudes of the signal samples so produced to determine...
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4538172 |
Analog to digital converting system for composite video signal
An analog to digital converting system for a video signal is disclosed in which an analog video signal is fed to an analog to digital converter, then converted to a digital video signal, a digital...
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4514754 |
Digital color television signal processing circuit
In a phase control loop (3, 15, 85, 87, 89, 90) for the A/D converter of a digital color television signal processing circuit an input (13) and an output (23) of a delay circuit (21) are connected...
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4463371 |
Clock generation apparatus for a digital television system
A digital signal processing system of a television receiver includes a digital to analog converter for converting an analog television signal to representative digital samples at times...
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4404583 |
Method and apparatus for determining and controlling the sampling phase in sampling the burst signal of a color television signal
The burst signal of a color television signal is sampled at a rate which is a multiple of the burst signal frequency. A theoretical sample level of the burst signal is determined as a function of...
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4403244 |
Apparatus for correcting a variation in the time base of a reproduced video signal
An apparatus suited for correcting a variation in the time base of a reproduced signal in a video disc player comprises a frequency converter circuit for converting the frequency of the reproduced...
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4402005 |
Clock generator for a digital color television signal receiver
An arrangement is provided for developing timed clock signals for a digital baseband television signal processing system. An AFPC loop circuit is responsive to the color burst signal component of a...
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4389663 |
Apparatus for indicating the phase of the color subcarrier signal in each line of a color television signal
Apparatus is provided for indicating the phase of the color subcarrier signal present during each line of a color television signal so as to identify whether that line is odd or even. A phase...
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4301466 |
Fast acting phase shifting apparatus for use in digital sampling systems
A method and apparatus is disclosed for controlling the sampling of a composite analog color video signal so that the analog signal is sampled at precise locations relative to the phase of the...
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4291332 |
Phase-locked circuit
Disclosed is a phase-locked circuit which includes a voltage controlled oscillator to supply a sampling clock signal to an analog-digital converter for converting a composite color television...
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4196445 |
Time-base error correction
In an automatic phase control circuit having a predetermined lock-in range wherein the oscillating signal produced by the adjustable oscillator of the automatic phase control circuit is used in...
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4183048 |
VIR-controlled hue correction circuit
A hue correction circuit for use in video display apparatus which is responsive to a composite color video signal including luminance, chrominance, burst and VIR signals. A controllable local...
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4151550 |
DPCM Predictors for NTSC color composite TV signals using phase adjustment of sampling
NTSC color composite signals are sampled at any frequency f s , which is a rational multiple of the color subcarrier frequency, and the phase relationship between samples of adjacent lines can be...
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4127867 |
VIR hue control system
An automatic hue control system for a color television receiver using a single sampling of a vertical interval reference (VIR) signal to establish the hue setting of the receiver. A VIR signal...
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4122487 |
Precision phase controlled clock for sampling television signals
A method and apparatus is disclosed for sampling an analog information signal having an associated carrier signal at precise phase positions with respect to said carrier, which involves sampling...
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4075656 |
Circuit for digitally encoding an analog television signal
A circuit for digitally encoding an analog television signal by sampling is provided. The circuit includes an analog-to-digital encoder which receives both the analog television signal and a...
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