Matches 101 - 150 out of 236 < 1 2 3 4 5 >
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4951126 Video signal processing method and apparatus therefor for creating a picture-in-picture  
A video signal processing method for a picture-in-picture function comprises the steps of sampling a second composite color television signal corresponding to a subscreen by a signal (3 fsc) having...
4941035 Method of sampling color video signal having alternating phase characteristics  
A method of sampling a color video signal arranged as a sequence of color frames provides identification of a selected one of the color frames. In a preferred embodiment, the method is directed to...
4930003 Burst/continuous wave converting apparatus for converting continuous wave in response to bursts  
A color synchronizing circuit (120) of a color television receiver includes a PLL circuit having a phase detector circuit (12b), an LPF (12c), a VCO (12d) and a 1/4 frequency divider (12f). Color...
4912549 Video signal synchronization system as for an extended definition widescreen television signal processing system  
Apparatus and method of synchronizing the component signals of a multi-component augmented television signal between its generation reception are disclosed. The disclosed apparatus includes...
4860089 Apparatus and method for tracking the subcarrier to horizontal sync of a color television signal  
Tracking of a standard or non-standard input video signal, such as a NTSC or PAL composite video signal, is provided by supplying the phase difference between a horizontally-related subcarrier...
4857990 Digital video storage  
A simple, efficient technique for encoding NTSC video signals features sampling the signal at 8/3 the subcarrier frequency, generating no more than 256K samples for a full 525 line frame,...
4853796 Recording/reproducing apparatus for digital composite video signal with means for synchronizing color subcarrier phase  
In a recording/reproducing apparatus for digital composite video signal, a phase sync circuit (110) for synchronizing color subcarrer phases, a sync/ID adding circuit (9), a sync/ID detecting...
4821112 Detection circuit for detecting standard television signals and nonstandard television signals  
There is provided a detection circuit for TV receiver which includes a frame comb filter and a field comb filter and which generates a luminance signal or a chrominance signal by effecting addition...
4811085 Video signal synthesizer for producing a picture in-picture effect on a display  
A video signal synthesizer for producing a picture-in-picture effect on a display device utilizes a phase locked loop circuit to generate a carrier wave synchronized with a color burst signal of a...
4799102 Digital color demodulator  
This invention provides a digital color demodulator having: a first phase locked loop circuit which generates an analog subcarrier signal phase locked to the color burst signal; a second phase...
4797732 Subcarrier generating device for color signal processing circuit  
A continuous subcarrier signal generated by a voltage-controlled oscillator is supplied to a harmonic removal filter, where harmonic components contained in the continuous subcarrier signal are...
4769691 Burst locked oscillator with side-lock protection  
A burst locked phase locked loop (PLL) includes a relatively wide-band voltage controlled oscillator. This PLL may erroneously lock at a frequency which differs form the frequency of burst by an...
4766483 Automatic color tuning system with variable gain APC circuit  
An automatic color tuning system includes a counter controlled oscillator that is started in the middle of its controllable frequency range. If the counter counts around and no color burst signal...
4758877 Color bar autofind  
A method for automatically finding color bars within a television video signal checks for a black burst at the end of a horizontal video line to determine the appropriate color bar standard for...
4758879 Circuit arrangement for controlling an oscillator in a colour television receiver or a video recording and/or reproducing apparatus having a phase alternating subcarrier.  
The invention relates to a circuit arrangement for controlling an oscillator. In a first phase-comparator circuit a burst signal whose phase alternates in a predetermined sequence is compared with...
4736238 Fully digitized video signal reproducing apparatus  
A digital television circuit in which the analog FM video signal is first digitized and all processing is performed digitally, including FM demodulation. Clocks at the subcarrier frequency and four...
4736237 Chroma demodulation apparatus for use with skew corrected clock signal  
An apparatus is disclosed for generating a burst-locked, color subcarrier representative signal φ sc from a skew-corrected clock signal MCS (which is reset once every horizontal line) and a skew...
4729013 Time base error corrector  
A time base error corrector comprises a chrominance subcarrier phase corrector whereby the subcarrier phase of a video signal is controlled before being written in the buffer memory in such a way...
4724476 Chrominance signal processing apparatus  
A chrominance signal processing apparatus for converting an input carrier chrominance signal received in a first operation mode to an output low-band converted chrominal signal, and for converting...
4703340 Frequency division multiplexed analog to digital converter  
A digital television receiver, having a line locked clock, includes a first digital phase locked loop which regenerates quadrature phase related subcarrier signals that are used to synchronously...
4700217 Chrominance signal phase locked loop system for use in a digital television receiver having a line-locked clock signal  
A digital television receiver which uses a line-locked clock signal employs chrominance signal demodulation circuitry which produces a digital oscillatory signal that is locked in phase to the...
4697207 System for generating a synchronizing signal in response to two timing reference signals  
A method and system for composite system phase control in a signal processor such as a television video recorder operating in a genlocked system. A synchronizing signal, preferably a frame-rate...
4691226 Color-television receiver with at least one integrated circuit for processing the digitized composite color signal  
A phase-locked loop for the color subcarrier signal in a television receiver is opened for non-sychronizable signals and the voltage controlled oscillator oscillates on a predetermined frequency....
4680621 Method and apparatus for variable phasing of periodic signals  
A periodic output signal is generated at a variable phase relative to a periodic input signal by comparing the input signal with a third periodic signal that has a frequency which is less than the...
4679005 Phase locked loop with frequency offset  
A phase-locked loop for generating an output signal whose phase is locked onto that of a reference signal and whose frequency is offset in respect to an integral multiple of the reference signal...
4670774 Video format signal generator with improved synchronization system  
A video format signal generator based on a CRT controller, for producing a composite video format signal to be applied to a CRT display unit, is provided with improved circuit means for generating...
4661844 Integrated circuit for the color decoder of a television set  
An integrated circuit is provided for the color decoder of a television receiver set and in particular for a multistandard decoder for NTSC, PAL and SECAM. Conventionally employed external...
4636836 Phase locked loop system for providing a phase shifted output signal  
A phase locked loop system is described in the context of a digital television receiver. The system includes a band-pass filter which shifts the phase of burst samples provided to it by 33°. This...
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...
4635099 Apparatus for detecting nonstandard video signals  
Circuitry for detecting nonstandard video signals is disclosed. This circuitry is used in a sampled data video signal processing system to control signal processing steps which utilize a frame...
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...
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...
4618880 Method and apparatus for synchronizing a plurality of television signals  
When the output of a number of color television signal generators is to be combined, all of these outputs must be correctly timed with respect to one another. To accomplish this, the output of a...
4617587 Recovery system for a control loop  
Non-inverting amplifier, with bandpass filter in regenerative feedback path, forms color reference oscillator in a color TV receiver. Phase shift circuit, responsive to an oscillator output,...
4612568 Burst-to-line-locked clock digital video signal sample rate conversion apparatus  
A digital video signal processing system is described wherein analog video signal is sampled by a sampling clock phase locked to burst and the digital video samples are processed with a clock phase...
4611239 Oscillator synchronizing system for eliminating static phase errors  
Non-inverting amplifier, with bandpass filter in regenerative feedback path, forms color reference oscillator in a color TV receiver. Phase shift circuit, responsive to an oscillator output,...
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...
4580165 Graphic video overlay system providing stable computer graphics overlayed with video image  
A color graphic overlay system for providing high speed, high resolution color graphics display combined with a video image from a videodisc, videotape or camera. The system includes a video mixing...
4578673 Video color generator circuit for computer  
A color video generator for use with a digital computer and a color video display. The computer produces digital data signals, each of which is composed of plural bits which represent a color to be...
4561014 Method and circuit for frequency and phase locking a local oscillator for television  
A conventional phase locking loop for locking a local oscillator in phase and frequency to a color burst signal in a television system requires a highly stable (i.e. crystal controlled) oscillator...
4544943 Stabilized color television subcarrier regenerator circuit  
A subcarrier regenerator circuit for use in color television receiver demodulators. The regenerator includes a voltage-controlled oscillator and a fixed frequency oscillator set to the nominal...
4531147 Digital memory color framing circuit  
The invention provides a color framing circuit for a digital memory, which has a first read line flip-flop generator for producing an RLFF 0 pulse; a toggle flip-flop for receiving a loading data...
4491862 Color-television receiver with at least one digital integrated circuit for processing the composite color signal  
To digitally synchronize the chrominance-subcarrier oscillator in the form of a phase-locked loop with the color burst contained in the composite color signal, suitable digital subcircuits are...
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...
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...
4395733 Television special effects circuit for wiping video signals  
A method of wiping from one television video source to another encompasses the steps of mixing the color burst information during each horizontal blanking interval while wiping the video...
4393413 Velocity error compensator for time base error corrections of periodic information signals  
A velocity error compensator adapted for use in a time base corrector of the type which includes a main memory into which individual periods, such as horizontal line intervals, of information...
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...
4366451 Chrominance subcarrier regeneration network  
A chrominance subcarrier regeneration network having high stability, the network being adapted for use in a video tape recorder and including a phase detector for comparing the phase of a gated...
4344075 Timing circuit for the digital generation of composite luminance and chrominance video signal for non-interlaced television raster scan-line pattern  
Ragged vertical edges normally displayed by a NTSC color-carrier on a non-interlaced display are effectively eliminated through persistence of vision by altering the duration of a selected single...
Matches 101 - 150 out of 236 < 1 2 3 4 5 >