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Class 348/506 - Burst gate

Subclass of Class 348 - Television
Definition: Subject matter including specific circuitry for separating
No. of patents: 139
Last issue date: 11/06/2012

NumberTitleIssue Date
4942314Peak holding circuit for a color television receiver
A peak holding circuit comprises a capacitor for holding signal charges corresponding to a peak level of an input signal, and a current amplifier circuit comprising transistors connected in a triple darlington manner for supplying an output current corres...
4893175Video signal transmission system with reduced number of signal lines
A video signal transmission system for transmitting a plurality of color video signals and horizontal/vertical sync signals from a transmitter part to a receiver part through a plurality of signal transmission lines is disclosed. The transmitter part incl...
4864399Television receiver having skew corrected clock
A digital TV receiver includes an apparatus for generating a skew corrected clock. The apparatus consists of a fixed frequency, free running oscillator for producing a signal having a frequency which is a fixed integer multiple K of the desired nominal fr...
4864387PAL video time base corrector inverts color difference signal (V) axis
A time base corrector converts an analog input PAL image signal including a certain time base error to digital form and then stores it in a memory by using a write clock signal derived from the input PAL image signal including the time base error. The sto...
4860120Low-frequency converter for carrier chrominance signal
A first PLL circuit receives a color burst signal of a carrier chrominance signal and outputs a first continuous wave signal which is identical in frequency and phase to the color burst signal. The first continuous wave signal is frequency converted by a ...
4843470Integrated synchronizing signal separating circuit for generating a burst gate pulse
An integrated circuit for improved burst gate pulse separation for use in a digital video system that receives a positive composite video signal wherein horizontal, vertical and composite synchronizing signals and a burst gate pulse signal are respectivel...
4803553Video timing system which has signal delay compensation and which is responsive to external synchronization
4788585Apparatus for measuring SC/H phase of composite video signal
A measuring instrument for SC/H phase of a composite video signal is provided in which a phase comparison is made between at least a portion of a color burst extracted from the video signal and a continuous subcarrier frequency signal that is phase-locked...
4782246Phase shift circuit for electrical signal
A phase shift circuit comprises a variable phase shifter responsive to an externally supplied voltage to change the amount of phase shift, and a phase detector operative to detect a phase difference between input and output signals of the variable phase s...
4714954Read start pulse generator for time base corrector
A read start pulse generator comprises circuit elements for automatically adjusting the phase of a read start pulse signal by cancelling phase offset caused when phase adjustments are made to a synchronizing signal, burst signal, and hue signal....
4706034Signal discriminating apparatus for extracting component signals from a composite signal
An apparatus for extracting a specific component signal from a composite signal composed of a first component signal and a second component signal. The apparatus includes two transistors which separate a received composite signal into two separate compone...
4688081Apparatus for correcting time base error of video signal
In order to correct a time base error of a video signal reproduced from a video signal recording/reproducing apparatus such as a VTR or the like, when the reproduced video signal is sequentially written into or read out from a memory, a signal which is ob...
4677459Reference signal generator
A reference signal generator used to compensate for a time base error of a color video signal reproduced from a video tape recorder having a memory into which the color video signals are written in response to a write clock and from which the color video ...
4675724Video signal phase and frequency correction using a digital off-tape clock generator
In a time base correction system, a composite color television analog signal derived from a prerecorded tape is converted by an analog-to-digital (A/D) converter to a digital signal having horizontal sync and color burst signal components. The digitized s...
4663659Video signal scrambling system employing full line reversal and double burst coding
A memory reverses the sequence of samples of selected lines of a composite video input signal without separating the color burst and chrominance components of the lines thereby preserving chroma-burst phase integrity of scrambled lines. A burst inserter a...
4652778I2 L delay circuit with phase comparator and temperature compensator for maintaining a constant delay time
A delay circuit for delaying an FM video signal is disclosed. The delay circuit includes an input for supplying the FM video signal, an output for producing a delayed FM video signal, and a delay line connected between the input and output for delaying FM...
4646136Television signal synchronizing apparatus with sync phase control for video signal
A television synchronizing apparatus for synchronizing an input television signal to a reference television signal. The input and output television signals are of the type which include several signal components including a video signal, a color subcarrie...
4635100Digital automatic video delay system
A digital automatic video delay system includes a device for digitalizing a television signal with sampling clock signals having a frequency of N (an integer) times as high as the frequency of the color subcarrier of the television signal, a device for wr...
4620219Apparatus for detecting a chrominance reference burst component to develop a burst gate pulse
Apparatus for generating a burst gate pulse from composite video includes a threshold detector for generating output pulses on consecutive positive and negative going burst signal cycles. Output signal from the threshold detector is applied to a digital c...
4613827Write clock pulse generator used for a time base corrector
A write clock pulse generator is disclosed, in which a horizontal synchronizing signal is separated from an input video signal and supplied to a PLL (phase locked loop) circuit to form a first clock with the frequency of nfH (n is an integer), ...
4611240Chrominance 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 amplifiers, controls the frequency and phase of an output of a VCO....
4590510System for processing a composite color television signal obtained from a recording medium
An uncorrected composite color television signal, including frequency-modulated luminance and frequency-transposed chrominance components is recovered from a storage medium and separated by filters into its luminance and chrominance components. The chromi...
4581630Constant width burst gate keying pulse generator
4577216Method and apparatus for modifying the color burst to prohibit videotape recording
A method and apparatus which modifies a color video signal in such a manner that a conventional television receiver produces a normal color picture from the modified signal, whereas a videotape recording made from the modified signal exhibits annoying col...
4555722Tri-level sandcastle pulse decoder
Trilevel sandcastle pulse decoder includes a trio of voltage comparators for comparing incoming sandcastle pulses with reference potentials of respectively different levels. One of the voltage comparators, which is subject to change in operating state in ...
4555679Detection circuit for detecting synchronous and asynchronous states in a phase-locked loop circuit
The output of a phase comparator in the PLL of the data reproduction unit is filtered to remove low frequency components which may be due to record eccentricity. The filtered output is then rectified and integrated, with the level of the integrated signal...
4550338Detecting circuit
A detecting circuit comprises a synchronous detecting circuit (11, 12, 15 to 19, 22 and 27 to 29) and a switching transistor (35). The collector and the emitter of the transistor (35) are connected to junctions (A) and (B), respectively, of the synchronou...
4549202Trilevel sandcastle pulse encoding/decoding system
A color TV receiver is provided with an encoding/decoding system for a trilevel sandcastle pulse train, exhibiting a middle pulse level during recurring kinescope bias control intervals, and comprising excursions between a base level, a low pulse level, a...
4549225Color video signal processing circuit for performing level control and time axis deviation compensation
A reproduced color video signal processing circuit in a rotary recording medium reproducing apparatus reproduces a recorded signal from a rotary recording medium which is recorded with a composite color video signal in which a carrier chrominance signal i...
4514754Digital 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 to a comparator (19) to derive a control signal from the i...
4489348Video camera synchronizer
An apparatus for providing video signal synchronized operation between two or more video signal originating devices, such as video color cameras, one operating as a master, and the other one or more video cameras or devices operating as slaves or masters,...
4489343Television image receiver provided with vertical synchronizing circuit count system
In a television image receiver provided with a vertical synchronizing circuit of a count-down system, a down counter to be reset in the an even number of pulse section among the pulses to be partitioned off by the undercuts in the vertical synchronizing s...
4485353PLL Oscillator synchronizing system with matrix for phase correction
Color reference oscillator in a color television receiver comprises a non-inverting amplifier, with positive feedback from its output conveyed via a crystal filter to its input. A quadrature phase shift network, coupled to the filter output, develops phas...
4485354PLL Oscillator synchronizing system with DC control of free-running frequency
Color reference oscillator comprises a non-inverting amplifier, with positive feedback via a crystal filter linking its output and input. A quadrature phase shift network, coupled to the filter output, delivers phase shifted signals to a pair of independe...
4466022Color video signal reproducing apparatus which transforms the recorded signal of one signal format into signals of another format upon reproduction
A color video signal reproducing apparatus comprises a reproducing circuit for picking up and reproducing a recorded signal from a recording medium in which a carrier chrominance signal and a color burst signal within a PAL system color video signal are c...
4450474PAL System synchronizing signal generating apparatus
Synchronizing signals in a PAL system are generated without the need for an n fH oscillator by generating a reference signal having 568 cycles per line, adding a half cycle per line and then substracting one cycle per field. Pre-synchronizing s...
4445135Synchronizing system for television signals
A digital main store having a capacity of one field and a buffer store of much lower capacity upstream of the main store are so arranged that the buffer control controls the buffer store to compensate frequency differences between an input television sign...
4425576Picture stabilizing circuit in color television receiver
A picture stabilizing circuit in a color television receiver decodes a count value in a counter comprising a vertical synchronizing circuit of a pulse count system for generating an ineffective-rendering pulse covering a period including a vertical synchr...
4422103Device for reducing the effect of time base variations in video disc player
A device for eliminating time base variations in a video disc player in which a gate pulse controlled by the latest time base information is generated for preventing faulty operation during the absence of burst signals. The gate pulse is generated after a...
4419752Circuit arrangement for transmitting two signals over one line in opposite directions
A circuit for transmitting in opposite directions two pulse-shaped signals via one connecting terminal(K) of a semiconductor body. When one signal is transmitted the signal path for the other signal is inhibited, which is accomplished by means of switchin...
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