Class 348/509 - With line rate switch (e.g., PAL)

Subclass of Class 348 - Television
Definition: Subject matter wherein the sync is used to cause a switch
No. of patents: 23
Last issue date: 07/24/2007

Number	Title	Issue Date
7248658	Method and circuit for deriving a second clock signal from a first clock signal A clock generation circuit for a dual system radio frequency station is provided. The station includes a digital synthesis circuit clocked by a first clock signal for a first RF system that is adapted to generate a base signal output of a predetermined frequency. A ...	07/24/2007
7227585	Luminance and chrominance separation system Provided are decoding methods and decoders for separating luminance and chrominance components of a video signal. In one aspect, a reference subcarrier of a first line of the video signal is used for subsequent lines by applying an appropriate rotation to the refere...	06/05/2007
7092042	Broadcasting receiver A PLL circuit compares a PCR with the output frequency of a voltage controlled oscillator (VCO), and returns a voltage value which is the result of the comparison to the VCO, so that a reference clock corresponding to the PCR is outputted from the VCO. A switch supp...	08/15/2006
6947060	Image forming apparatus, electron beam apparatus, modulation circuit, and image-forming apparatus driving method An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance...	09/20/2005
6839092	Feed forward error correction in video decoder In accordance with an embodiment of the present invention a microprocessor in the horizontal phased lock loop reads the horizontal timing with respect to the sync input and provides an increment inch to the horizontal discrete time oscillator to make corr...	01/04/2005
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 reference clock in response to a PAL switch signal. A phase del...	06/16/1998
5589891	Video synchronized power module The synchronized transformer-coupled power supply circuit includes a transformer 20; an input power signal coupled to a primary winding 22 of the transformer 20; voltage regulators 48-53 coupled to secondary windings 24 and 26 of the transformer 20; and a...	12/31/1996
5539472	Waveform analyzer for separating an eight field sequence of a PAL video signal An input signal is inputted to an A/D converter through an amplifier and is converted into a digital input signal. A vertical synchronizing pulse and a horizontal synchronizing pulse are taken out of the output signal of the amplifier by means of a TV syn...	07/23/1996
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 amount equal to the horizontal line frequency. To prevent th...	09/06/1988
4745493	Circuit arrangement for a color image recording and reproduction instrument or a color television receiver A circuit arrangement for a color image recording and reproduction instrument(video recorder) or a color television receiver. Such devices have a phase regulation circuit in which an oscillator (18, 59) is controlled in accordance with the phase compariso...	05/17/1988
4706110	Apparatus for decoding a PAL standard color television signal The synchronously demodulated chrominance signals (C1d, C2d) each alternately represent, line by line, the sum and difference of the color difference signals U and V. They are supplied to a multiplexer (21) switched by a meander wave...	11/10/1987
4663654	Blanking signal generator for a subcarrier locked digital PAL signal Non-orthogonality of the blanking region information caused by the 25 Hz offset in a digital PAL-encoded color television signal is corrected by a dynamic offset circuit. To this end, a plurality of waveforms describing the envelopes of the blanking, sync...	05/05/1987
4652778	I² 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...	03/24/1987
4412181	Process for the demodulation of an amplitude modulated signal and demodulator performing this process A process for the demodulation of an amplitude modulated signal composed of two suppressed carriers, at a same frequency F and in phase quadrature, which are respectively modulated by two modulation signals, the modulated signal being preceded by a refere...	10/25/1983
4337477	Color demodulating apparatus A color signal demodulating device designed so that a local subcarrier oscillator generates a demodulating signal which is both synchronized and inverted in phase with respect to a color signal at each horizontal scanning period so as to demodulate an R-Y...	06/29/1982
4308550	Reproducing apparatus with cross-talk suppression for a color television signal In a reproducing apparatus for a color television signal recorded on a record carrier, of which at least the chrominance signal which contains the color synchronizing signals is recorded with periodically changed polarity in the individual line period sec...	12/29/1981
4277795	Circuit arrangement for detecting a switching phase As is known the phase of the chrominance signal is changed in a specific rhythm for the elimination of cross-talk during recording on a magnetic tape, spurious signals being cancelled via a comb filter. By means of an inverse combination stage after the c...	07/07/1981
4133002	PAL identification circuit In a PAL color television signal receiver including a color demodulator, a source of first timing signals for determining the line by line switching of the color demodulator, and a source of second timing signals coincident with the burst interval of the ...	01/02/1979
4122478	Clock signal generator providing non-symmetrical alternating phase intervals Apparatus is disclosed for providing a square wave output signal for use in alternating the phase of a sampling clock signal on successive video lines of a video signal having a horizontal blanking interval at the beginning of each video line and a burst ...	10/24/1978
4024572	PAL alternate line color phase detector The line-by-line R-Y component phase is detected by digital means directly from the composite video source, for example, the recorded composite video signal reproduced from a video tape recorder, and a continuous signal waveform at a two-line period is pr...	05/17/1977
4015287	Color television receiver including a chrominance subcarrier regenerator Switching the time constant of a filter in the APC-loop of a color television receiver is done by a keyed transistor switch so that the circuit is suitable to be formed as an integrated circuit....	03/29/1977
4009487	Blanking generator for PAL sync signals A single pre-vertical sync pulse that repeats once each field and the line-by-line chroma phase information which exists in the form of the PAL square wave at one-half of the horizontal line frequency are combined in a novel circuit comprising a pair of J...	02/22/1977
3955107	Phase switching device A phase switching device using a novel four terminal semiconductor device having a generally V-shaped emitter grounded current amplification characteristic or factor. The device is biased to a low point on the characteristic curve and a rectangular switch...	05/04/1976

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Class 348/509 - With line rate switch (e.g., PAL)