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5822011 |
Apparatus for detecting noise in a color video signal
A phase detector provides angular phase error measurements of the color burst component of a video input signal. Burst phase errors exceeding a given angular threshold are detected and the number...
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5812208 |
Burst separator and slicer circuit
A burst separator and slicer circuit separates the burst signal from an input composite video signal. Each period of the input composite video signal includes a horizontal synchronization signal, a...
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5786865 |
Apparatus and method for digital amplitude and phase detection
A digital amplitude and phase detector for detecting the amplitude and phase of a color burst digital signal used in television systems is provided. The detector comprises a phase lock loop circuit...
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5784118 |
Video signal phase synchronizing method, circuit and synthesizing apparatus
When a continuous wave signal synchronized with a first color subcarrier signal is generated by a color subcarrier extracting circuit, a phase error detecting circuit, an A/D converting circuit,...
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5784122 |
Chroma lock detector
A chroma lock detector circuit monitors charge pump control signals within a phase-lock loop to determine when two input signals to the phase-lock loop are locked together in phase and generates an...
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5774184 |
Color burst forming circuit and color burst gate pulse forming circuit
A color burst gate pulse forming circuit has a first counter, a second counter, a logic circuit, and a decoding circuit. The first counter counts a chrominance subcarrier supplied in a form of a...
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5742191 |
D/A for controlling an oscillator in a phase locked loop
A phase-lock-loop circuit includes a digital-to-analog converter of the bit rate multiplier type. The input word to the converter is updated once each horizontal period of a television signal....
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5719512 |
Digital oscillating circuit for multiple systems-ready television receivers
An oscillator includes a frequency-controllable clock generator, and a digital oscillator responsive to a clock generated by the clock generator for oscillating a data sequence at a period in...
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5621472 |
System for inexpensive phase coherent subcarrier generation
The present invention is a system for inexpensive phase coherent subcarrier generation. The subcarrier sequence has a fairly short periodicity (two lines), allowing a relatively short lookup table...
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5534939 |
Digital video clock generation system
A digital clock generation system provides both a digital composite clock and a digital component clock synchronized with an input synchronization video signal. The digital composite clock is...
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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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5523792 |
Composite video sub-pixel timing adjustments using digital resampling
Composite video timing adjustments using digital resampling provides precise sub-pixel timing relative to a timing reference with a single video master clock. A digital resampler interpolates an...
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5500682 |
Memory equipment for writing/reading a defective video signal in a FIFO memory device consectively
The invention relates to a video signal memory equipment comprising a FIFO memory for storing video data of video signals, and a control unit for controlling writing and reading in the FIFO memory,...
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5481313 |
Burst signal generating circuit of a video processing system
In a video processing system, a burst signal generating circuit receives a discontinuous burst signal and generates a continuous burst signal by using a phase locked loop. In the conventional video...
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5432565 |
Y/C separation circuit for video use having separating means for separating the chrominance signal and the luminance signal on the basis of input and output signals
A Y/C separation circuit includes a first adder by which a carrier-multiplexed composite video signal is produced by multiplexing a color sub-carrier signal which is in synchronization with a color...
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5410368 |
Carrier acquisition by applying substitute pilot to a synchronous demodulator during a start up interval
A synchronous demodulator is controlled by a phase locked loop for tuning to a pilot in a television signal. A start-up interval is commenced upon initiation of tuning (either after power-up or a...
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5410360 |
Timing control for injecting a burst and data into a video signal
A secondary signal is processed and injected into a primary color video signal. The timing of the subsequent transmission of the secondary signal is controlled by timing signals. The timing signals...
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5402243 |
Regenerating circuit of synchronizing signals for standard video signals
A synchronizing signal regenerating circuit for standard video signals in a digital video signal processing system includes a circuit for regenerating stable horizontal synchronizing signals, a...
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5396294 |
Digital chrominance signal demodulation apparatus
Different from typical signal processing which employs a feedback control, by adopting a demodulating circuit employing AFC, which is not affected by a comb filter, the response characteristic...
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5389949 |
Video signal processor
A video signal processor comprising: a device defining a color pallet for converting a color code specifying the color of each pixel of a display picture into digital RGB color data; and a...
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RE34810 |
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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5355171 |
Digital oscillator and color subcarrier demodulation circuit having the digital oscillator
A digital oscillator including an integrator for cumulatively integrating a specified signal and a controller responsive to a control signal for maintaining the output frequency of the integrator...
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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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5353066 |
Method for preventing the deterioration of picture quality in a video processor and circuit thereof
A method and circuit for preventing the deterioration of picture quality in a video processor is disclosed in which, when an input color video signal is input, a clock signal for a combfilter is...
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5351089 |
Video signal processing device and method
A video signal processing device comprises: a unit for extracting a first color burst signal from a first video signal; a unit for generating a first subcarrier in synchronism with the first color...
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5351091 |
Burst phase correcting circuit
A burst phase correcting circuit includes a first all-pass filter which receives a chrominance sign inputted from a terminal. A phase reference signal from an oscillator is applied to a first...
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5345311 |
Pal system chrominance signal processing circuit with improved s/n
In a PAL system chrominance signal processing circuit, a color burst signal is delayed by one horizontal period, a signal representing the difference between a non-delayed burst signal and the...
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5325093 |
Analog-to-digital converter for composite video signals
An analog-to-digital converter. The VCO 111 generates a sampling clock with a frequency four times that of a subcarrier. The A/D conversion circuit 103 converts an analog composite signal on the...
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5319467 |
Video tape recorder for recording a video signal with an additional time-base reference signal
An apparatus for recording a video signal onto tracks of a recording tape includes circuitry for producing a first time-base reference signal which is a color burst signal composed of a first...
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5311296 |
Video signal generator circuit and video image processing device using the same
A state memory circuit responsive to a selection signal indicative of either the first television system or the second television system selected according to an external setting operation and...
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5301015 |
NTSC and PAL compatible digital encoder
A digital encoder for use in both NTSC and PAL systems includes a demultiplexer for separating a time-division color difference signal R-Y/B-Y into color difference signals R-Y and B-Y. The...
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5268750 |
Apparatus for adjusting the timing of sampled data signals in a resampling system
A video signal processing system uses a sequence of interpolation filters to resample a 125M video signal to produce a 244M signal. In addition, the system allows an operator to specify a desired...
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5251014 |
Circuit for detecting phase error of color burst signal
In a phase error detector for detecting a phase error θ of an input color burst signal from a phase of a reference signal from sin θ component and cos θ component, if either one of the sin θ...
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5245414 |
Video signal synchronizer for a video signal in luminance and chrominance component form
Video signals are supplied as component signals (in which the color signals are not correlated with a color carrier wave) and are stored in a frame memory and read out therefrom in synchronism with...
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5243412 |
Circuit for generating a clock signal which is locked to a specific phase of a color burst signal in a color video signal
A sampling clock signal, which determines sampling time points in an A/D converter used to convert a color video signal to digital form, is locked to a specific predetermined phase of the color...
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5231475 |
Method and apparatus for generating video signal representing controllable color matte
A matte synthesizer and method generates baseband video signal information from user inputs for selecting levels of luminance, saturation and hue. The synthesizer includes continuously variable...
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5229735 |
Wide frequency deviation voltage controlled crystal oscillator having plural parallel crystals
A wide frequency deviation voltage controlled crystal oscillator includes a multiple section bandpass filter containing a plurality of crystal or ceramic elements. One embodiment includes a...
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5220411 |
Synchronizing phase shift corrected synchronous signal detecting apparatus
In a system for eliminating time base fluctuation of a video signal having a synchronizing signal and a burst reproduced from a video disk, for example, the synchronism is first coarsely pulled in...
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5132784 |
Comb filter-burst locked clock circuitry
The present invention is directed to a video signal processing system including a burst locked clock generator which is repsonsive to separated chrominance signal provided by a comb filter. The...
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5132782 |
Interleave detector of composite video signal
An interleave detector between a horizontal synchronous signal and a chrominance subcarrier signal comprises a 1H delay part, an adder, a squarer, a low pass filter and a comparator for achieving a...
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5053862 |
Apparatus and method for generating a horizontal reset signal synchronous with a subcarrier locked clock
A method and apparatus for synchronizing a received television signal to a subcarrier locked signal is provided. The apparatus includes a comparison block for determining whether the received...
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5043799 |
Color image display control apparatus with correction of phase difference in sampling clock
A color image display control apparatus for receiving a composite color picture signal and processing color image data included in the signal. A color picture signal in an analog form included in...
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5021872 |
Phase locked subcarrier regenerator
Apparatus for generating a signal having a predetermined frequency relationship with a subcarrier includes a counter for counting cycles of said subcarrier. Count values from the counter are...
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5012330 |
Artificial front porch insertion circuit
A circuit for ensuring that the level of the front porch of each line in a color video signal is at a predetermined proper level includes a circuit for detecting the position of the horizontal...
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5012327 |
Circuit for and method of detecting a color field sequence of a color video signal
A color field 1 detector includes analog and digital processor sections, wherein the analog processor section receives a video signal input and provides the digital signals necessary to drive the...
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4992874 |
Method and apparatus for correcting timing errors as for a multi-picture display
A picture-in-a-picture television receiver displays a compound image which includes a compressed image derived from an auxiliary signal inset in a full-size image derived from a main signal. The...
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4977445 |
Sync-signal reproducing circuit for use in television receiver
A color subcarrier reproducing circuit reproduces a color subcarrier on the basis of a color burst signal in a color television signal in which phase reference data synchronized with the color...
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4975767 |
NTSC/PAL subcarrier based H-lock with color framing and detection
A NTSC/PAL subcarrier based H-lock with color framing method is disclosed which makes possible color frame detection and a digital lock to horizontal sync on a NTSC or PAL video signal, using...
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4970581 |
Circuit for and method of detecting color field sequence in a color video signal
A multi-standard color field sequence detector includes an analog and a digital processor section, wherein the analog processor section receives a reference video input and provides the signals...
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4964162 |
Secure television signal encoding and decoding system
A television signal encoding and decoding system providing a line-spin scrambled video signal with substantially reduced amplitude gaps and line tilt and a digitally-encrypted audio signal that can...
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