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8035739 |
Transmission system
In one aspect a transmission system with a transmitter which can be connected to a video source and a receiver linked to the transmitter via at least four circuit pairs, to which receiver a...
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7940332 |
Signal detection device and methods thereof
A device for detecting synchronization pulses in a video signal is disclosed. The device includes a transistor. The base-emitter voltage of the transistor is maintained below a threshold level in...
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7706488 |
OFDM frame synchronisation algorithm
A synchronization pulse representing a symbol boundary in a signal such as an OFDM signal is obtained by deriving a first signal representing the difference between the amplitudes of samples...
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7471338 |
Synchronous image signal data generator
In order to reduce the circuit scale and the manufacturing cost by decreasing the amount of data to be stored, a synchronizing signal data generating circuit outputs, at each timing, relative...
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7352406 |
Signal acquisition following transient signal interruption
A television monitor display with video signal processing comprises a source (SM) of a video display signal (Y) including a sync component (S). A video processor (U1) is coupled to process the...
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7110042 |
Synchronization signal decoder and associated method
The invention relates to a synchronization signal decoder and associated method for improving digital image display. A composite video stream includes a distortion compliant signal and a...
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6940561 |
Automatic modulation and RF carrier level control of sync suppressed television signals
The depth of modulation and the absolute RF carrier level of an amplitude-modulated video signal are automatically adjusted. For adjustment of the depth of modulation, a sync tip of the video...
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6169584 |
Automatic modulation control of sync suppressed television signals
The depth of modulation and the absolute RF carrier level of an amplitude-modulated video signal are automatically adjusted. For adjustment of the depth of modulation, a sync tip of the video...
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5953069 |
Sync separator circuit
Sync separator and video detector circuits, including a sync tip clamp having symmetrical and non-symmetrical clamps. The symmetrical clamp clamps the input video signal to a reference voltage...
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5867222 |
Video sync signal slicing using variable gain control
A video sync slicing circuit is disclosed that employs an adjustable gain control (AGC) amplifier and circuitry that adjusts a gain of the AGC amplifier such that a blanking level of the video...
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5818538 |
Sync on green signal separating circuit of an image output apparatus
A sync signal separating circuit of an image output apparatus includes an inversion amplifying section for providing a green video signal supplied from a video signal generator to be output as an...
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5774185 |
Method of and apparatus for removing equalizing pulses without using external pins
A circuit for removing every other equalizing pulse from a signal representing the sync pulses of a composite video signal, generates an output signal representative of every horizontal...
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5528303 |
Synchronizing signal active filter and method
An integrated active filter and sync separator circuit operates on precision internal reference sources to set the filter cut off frequency as a function of resistance of an external resistor. The...
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5502500 |
Circuit for extracting a synchronization signal from a composite video signal, in MOS technology
A circuit that extracts the synchronization signal from a composite video signal. The circuit includes a stage for aligning the low level of the synchronization signal interval with a reference...
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5497201 |
Sync chip clamping/sync separator circuit
Reductions in size and cost for a sync chip clamping/sync separation circuit are envisaged by the use of the CMOS process. The final output amplification section of a differential amplifier circuit...
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5162909 |
Television signal processing circuits
Apparatus for separating sync and video includes a luminance signal coupling capacitor, a keyed clamp circuit coupled to a source of back porch keying pulses for clamping a back porch interval of...
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5053869 |
Digital circuit arrangement detecting synchronizing pulses
In a digital circuit for detecting horizontal or vertical synchronizing pulses in a digital video signal, the video signal is applied to a level detector which supplies an extreme value signal...
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5045943 |
Synchronous signal separation circuit
A circuit for separating a synchronous signal from a video signal including a comparator and a bias circuit. The comparator is adapted to receive a video signal which also includes a synchronous...
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4918525 |
Method and device for precision sync pulses separation
A method based on clamping of composite video signals on sync level and on level black, summation of the two differently clamped signals and comparing with the constant clamping level. Processing...
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4860100 |
Synchronization system for a semi-digital signal
A system which provides synchronization with frame synchronization words of a partially digital signal, such as that of the D2MAC television standard. It is provided that three modes of operation...
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4821098 |
Circuit for deriving a synchronizing signal contained in an incoming video signal
A circuit for deriving a synchronizing signal contained in an incoming video signal, having a pulse generator generating the synchronizing signal when the incoming signal reaches a threshold value....
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4812907 |
Sync pulse separator system
A method and apparatus for separating sync pulses by charging a capacitor to the sync tip voltage level during occurrence of a sync pulse and discharging the capacitor to the back porch voltage...
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4745477 |
Antijitter arrangement for synchronizing pulse separator
A synchronizing pulse separator for a video apparatus provides horizontal and vertical synchronizing pulses from a composite video signal. The sync separator incorporates a compensation circuit...
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4723165 |
AC coupled sync separator system with filter DC feedback
A novel method and apparatus of AC coupling composite video sync information to a sync separator circuitry with digital controlled filtered DC feedback is described. An AC coupling circuit such as...
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4707740 |
Sync detector having noise adjusted slice level
A sync detector is provided for recovering or extracting a sync signal from a video signal. The circuitry includes a slice level comparator for comparing the video signal against a slice level...
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4698679 |
Sync separator
A sync separator detects, in a corresponding part of the waveform of a video signal, the occurrence of the trailing edge of a corresponding sync pulse, in accordance with the rate of change of the...
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4697211 |
Sync separator with periodic updating
A sync separator detects the occurrence of a corresponding sync pulse in a corresponding part of the waveform of a composite video signal. The level of the sync tip is used for updating a slice...
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4635115 |
Synchronous separation circuit
A synchronous separation circuit comprises a capacitor, one end of the capacitor serving as an input terminal for receiving a synthetic video signal, a first C-MOS inverter, an input terminal of...
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4628361 |
Video synchronizing signal separator
An improved video synchronizing signal separator for separating luminance and synchronizing signal components, respectively, from a composite video signal. Separate luminance and synchronizing...
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4622586 |
Digital slicer having a pulse-width locked loop
A bit-decision circuit or slicer for a digital communications receiver includes a first comparator which compares the received signal level with a reference slicing level. In order to have the...
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4621288 |
Reference time detecting circuit
A reference time detecting circuit for detecting a predetermined transit of a synchronizing signal taken as a reference time of a video signal detects the reference time by using a masking pulse...
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4621289 |
Digital sync separator and differentiator
Composite sync is separated from video despite noisy, weak, or nonstandard signal conditions. Sync is separated from the composite video signal by comparing the video signal to a D.C. reference...
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4506297 |
Integrated circuit for television receivers comprising a sonic separator with a clamping circuit
To prevent the separation-level shift occurring in the clamping circuit during the transmitted vertical synchronizing pulses or during prolonged interference pulses, a pulse opening an electronic...
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4414569 |
Transistor circuit
The present invention provides a transistor circuit suited for a synchronizing signal separator. More particularly, the transistor circuit can separate the noise-free synchronizing signal from a...
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4385319 |
Synchronization signal separating circuit
A synchronization signal separating circuit for deriving synchronization signals from a composite video signal, a clamp circuit which clamps the sync chip level of the composite video signal to a...
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4357629 |
Sync separator with variable bias control
A variable slicing level is provided for the sync pulse separator of a television (TV) receiver to enable proper sync signal separation from the video signal as the strength of the received signal...
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4233629 |
Sync separator with a look-ahead clamp
An apparatus and method for precise separation of synchronizing information from a color television signal is described. Synchronizing signals are separated from the input video and used in a...
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4185299 |
Synchronization signal separator circuit
A synchronization signal separator circuit is provided for separating the synchronizing signal components of a composite video signal. A composite video signal containing negatively-directed...
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4101940 |
Circuit for delaying a composite video signal by a line duration, particularly for use with a video record player
A composite input video signal, having blanking intervals and including line sync pulses increasing the amplitude of the input signal, is applied to the circuit, is amplitude filtered, and is split...
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4097896 |
Sync separator circuit
A constant current source supplies a bias current through a diode chain, establishing a first voltage at a terminal coupled to the string. A DC restorer circuit, responsive to a source of composite...
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4081833 |
Synchronizing signal separating circuit for television video signal processing
A synchronizing pulse separating circuit provides synchronizing pulser from an incoming composite television signal wave including such a wave formed of switched plural individual television...
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4064541 |
Constant pulse width sync regenerator
A sync regenerator is provided which regenerates synchronizing information signals having a varying amplitude and width by comparing the sync signals in a comparator circuit to which a source of...
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3903365 |
Synchronizing separator circuit
A synchronizing signal separator circuit in a television apparatus such as a television receiver corrects the distortion of a composite video signal including a synchronizing signal component,...
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3881055 |
Circuit arrangement for separating synchronizing signals from a video signal
A circuit arrangement for separating synchronizing signals from a television signal in which the reference level for a required amplitude selection circuit is obtained with the aid of a matrix...
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3879576 |
SYNCHRONIZING SIGNAL SEPARATING CIRCUIT
In a synchronizing signal separating circuit comprising an amplifier circuit receiving a composite signal, for example, a video signal, and a self-biasing circuit that includes a capacitor which is...
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3869568 |
SYNCHRONIZATION SEPARATOR CIRCUIT
A synchronization signal separator circuit wherein a compound video signal is applied through a peak value detector circuit to one of the input terminals of a differential amplifier, and said...
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3858003 |
EMITTER COUPLED SYNC SEPARATOR
An emitter coupled sync separator for a television receiver comprising a pair of transistors connected together with the first transistor receiving the composite video signal and gated to the on...
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3845240 |
SYNC PULSE DETECTOR FOR VIDEO TELEPHONE SYSTEM
A video sync pulse detector for use in video telephone systems. Detection of sync pulses of proper frequency and duration is used to operate switching equipment to connect video telephone...
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3843957 |
VIDEO PROCESSING CIRCUIT
A circuit for removing sync pulses from a composite color video signal and for black level clipping the luminance component of said signal without affecting the chrominance component. The composite...
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3809808 |
VIDEO SYNC SEPARATOR
A video signal is coupled by an emitter-follower through a capacitor to the base of a transistor connected in a common emitter configuration with its emitter directly connected to a clamping...
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