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| Number | Title | Issue Date |
| 7671923 | Digital processing system and method for tracking subcarrier included in video signal A digital processing system and method for tracking a subcarrier included in a video signal are provided, where a phase comparator tracks the phase of a color burst signal based on predetermined supposed phases, Y/C separation and demodulation are carried out based ... | 03/02/2010 |
| 7508451 | Phase-noise mitigation in an integrated analog video receiver Phase noise mitigation in an analog video receiver implemented in an integrated circuit device. A phase correction value that indicates a phase offset between a synthesized sinusoid and a reference sinusoid conveyed in a horizontal retrace region of a composite vide... | 03/24/2009 |
| 7349009 | Vector waveform correction device A phase shifter (70) for correcting the phase of a sub-carrier signal input into a decoder to a burst signal has a phase shift setting (5), a correction amount setting (9′), a phase shifter (6) and a 90-degree phase shifter (7). ... | 03/25/2008 |
| 7295089 | Surface acoustic wave filter and communication apparatus A surface acoustic wave (SAW) filter includes a piezoelectric substrate. A resin pattern having a permittivity less than that of the piezoelectric substrate and first and second conductor patterns are disposed on the piezoelectric substrate. The first conductor patt... | 11/13/2007 |
| 7277134 | Chrominance signal demodulation apparatus An NTSC system chrominance signal demodulation apparatus is provided with a clock timing change circuit for burst-locking an input signal under the state where the phase is shifted by 90 degrees for every line, and phase axis rotation circuits for performing phase a... | 10/02/2007 |
| 7268825 | Digital synchronizing generator A sync generator (genlock) (10) for frequency and phase locking an incoming video signal to a system clock (12) includes a digitizer (16, 22) for digitizing the incoming video signal to yield a digitized color sub-carrier burst component. A nume... | 09/11/2007 |
| 7224407 | Color demodulation device, color demodulation method and image display device A color demodualation device having an AD converter, a phase signal generator, a burst data generator and a multiplier. The AD converter produces digital samples of chrominance signal at a frequency four times a color subcarrier frequency, and the phase signal gener... | 05/29/2007 |
| 7027102 | Software decoding of composite video without a phase-locked loop A software decoder for converting standard composite video to RGB color components without a phase-locked loop. Subcarrier phase recovery for each video line is accomplished by performing a single DFT computation on the color burst samples for the frequency closest ... | 04/11/2006 |
| 6952239 | Sine generation circuit, phase shift circuit and tint adjustment circuit A phase shift circuit includes a first sine generation circuit generating a sine-converted output signal (sin θ) of the phase shift input signal (θ) and a reversed sine-converted output signal (−sin θ) of the phase shift input signal (θ), a cosine generation c... | 10/04/2005 |
| 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 |
| 6912258 | Frequency-domain equalizer for terrestrial digital TV reception A single integrated circuit multi-standard demodulator includes an adaptive inverse channel estimator for frequency domain equalization which employs a recursive least square cost function in estimating the inverse channel from the received signal and an error estim... | 06/28/2005 |
| 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 |
| 6765621 | Color system discriminator A color system discriminator is provided with a frequency detector, a vertical-synchronizing frequency detector, a plurality of color demodulators, a demodulating switch, and a controller. The type of the color system of a received signal is determined with referenc... | 07/20/2004 |
| 6760076 | System and method of synchronization recovery in the presence of pilot carrier phase rotation for an ATSC-HDTV receiver There is disclosed a system and method for recovering a recurring data segment synchronization pattern in the presence of an arbitrary phase rotation of a pilot carrier by detecting and compensating for the amount of the phase rotation. The system comprises a first ... | 07/06/2004 |
| 6753924 | Oscillation signal processing apparatus, television apparatus and oscillation signal processing control method In a conventional construction to obtain a reference signal for a tuner and a subcarrier for color difference signal demodulation by only one quartz oscillator, the reference signal is unstable due to a PLL operation for oscillation of the subcarrier, which causes t... | 06/22/2004 |
| 6567129 | Color demodulating device A color demodulation apparatus having color demodulation capabilities as the conventional ones, with its size reduced by sharing part of processing circuit therein is provided. An adder circuit 10 and a SW circuit 11 shift the phase of a ramp wave generat... | 05/20/2003 |
| 6330034 | Color phase-locked loop for video decoder A microprocessor controlled color phase locked loop is provided which provides flexibility and adaptability for different television standards and sampling rates. Color burst phase error and color burst amplitude information are stored in data registers l... | 12/11/2001 |
| 6215528 | Method and apparatus for digital multi-standard color signal demodulation The key component of a digital PAL or NTSC color decoder is a quadrature demodulator for these AM modulated signals. For a SECAM color decoder, however, an FM demodulation is required which is conventionally implemented using a Hilbert filter which is fol... | 04/10/2001 |
| 6172713 | Color television system determination circuit A color system determination circuit for use with an input video signal having a frequency component is disclosed. The circuit includes a color trap filter for attenuating the frequency component in the input video signal with the color trap filter provid... | 01/09/2001 |
| 6064442 | Color video signal demodulating apparatus A color video signal demodulating apparatus is provided. The apparatus includes a color subcarrier signal generator for generating a color subcarrier signal synchronously with a color burst, an abnormal burst detector for detecting an abnormal color burst... | 05/16/2000 |
| 6038276 | Digital phase lock loop for non-continuous reference signal A phase lock loop which locks a numerically controlled oscillator (NCO) to a non-continuous reference signal. The phase of the reference signal is ascertained by detecting the zero crossings of the signal. The zero crossing is provided to a phase detector... | 03/14/2000 |
| 5995168 | Digital video receiver A video receiver includes a tuner, a QAM demodulator including a selective gated PLL carrier recovery circuit, and a digital equalizer. The selective gated PLL carrier recovery circuit has a normal operation mode and a selection control mode. The channel ... | 11/30/1999 |
| 5831680 | Color signal processing circuit capable of processing PAL/NTSC color television signals which prevents image deteriorization caused by chromatization In a color signal processing circuit capable of processing a PAL/NTSC color television signal, in order to prevent an image deterioration caused by chromatization when a PAL signal is received in an NTSC signal receiving mode, there is provided a gate con... | 11/03/1998 |
| 5703660 | System and method for decoding a quadrature ampliture modulated signal A video signal decoder using a sample clock tied to a frequency that is an integer multiple of four times the color subcarrier (4*Fsc). By using a 4*Fsc rate on a given input wave, the decoder determines the phase shift between the sample clock and the or... | 12/30/1997 |
| 5654767 | Digital chrominance signal demodulating device In a digital chrominance signal demodulating device receiving a carrier chrominance signal obtained by digitizing an analog composite video signal, a frequency component near the horizontal frequency of the color subcarrier is extracted, and color-differe... | 08/05/1997 |
| 5459524 | Phase modulation demodulator apparatus and method This invention is for a reference generator and demodulator for recovering information which has been phase, modulated on (or encoded on) a carrier. The inventive concepts described herein include a novel reference measurement circuit including a sampler ... | 10/17/1995 |
| 5450136 | Decoder circuit for generating a system clock signal phase locked to a range tone signal A decoder circuit for receiving a video input signal which includes Manchester coded data bits and a range tone component having a frequency of about 102.6 kilohertz. A phase lock loop circuit detects the presence of the 102.6 kilohertz range tone compone... | 09/12/1995 |
| 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 against jitter is improved and a down converted chrominance si... | 03/07/1995 |
| 5355226 | Recording-reproduction apparatus applying double reset to the phase of an FM carrier A magnetic recording-reproduction apparatus records and reproduces a wide-band video signal without a color burst signal. For this purpose, a two-step phase resetting operation is conducted on the FM carrier at the front porch and the horizontal sync puls... | 10/11/1994 |
| 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 burst signal extracted from the first video signal; a unit... | 09/27/1994 |
| 5325184 | Method of and apparatus for regulating color in a received video signal A method of and apparatus for regulating color in a color broadcasting receiver is disclosed and is composed of a tuner, a demodulator, and a burst level detector for detecting the color burst level of a video signal output from the demodulator and output... | 06/28/1994 |
| 5317410 | I-axis detecting circuit provided in color demodulating circuit of TV receiver An I-axis phase pulse is allowed to be detected at the sampling point of a chrominance signal with a digitally-implemented circuit. A chrominance signal (sampling frequency f1) is subsampled by a frequency f2 (f1 /N) and s... | 05/31/1994 |
| 5194938 | SECAM decoder with phase-locked loop demodulators A SECAM decoder comprises an input receiving a chrominance subcarrier (SP); first and second outputs delivering respectively the decoded blue (B2) and red (R2) signals; a first PLL phase demodulator (30) receiving the subcarrier (SP), operative only durin... | 03/16/1993 |
| 5083197 | Apparatus for restoring the correct phase relation of the chroma and luminance signals passed through separate paths Apparatus is disclosed for processing the chroma and luminance signals reproduced from a magnetic recording medium. The chroma signal in passing through a separate path from the luminance signal may suffer a phase displacement relative to the phase of the... | 01/21/1992 |
| 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 bursts extracted from a composite chrominance signal by a b... | 05/29/1990 |
| 4864399 | Television 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... | 09/05/1989 |
| 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 frequency of the input signal and that has a duty cycle wh... | 07/14/1987 |
| 4677463 | Color television receiver comprising a chrominance signal processing circuit and an integrated circuit therefor By including a counting circuit, optionally followed by a sample-and-hold circuit coupled to an output of a quadrature-component demodulator in a chrominance signal processing section of a color television receiver and providing a memory circuit for a pre... | 06/30/1987 |
| 4633187 | AM synchronous detecting circuit A demodulating circuit for an amplitude-modulated signal comprises an input terminal to be supplied with an input signal comprising at least a modulated carrier signal amplitude-modulated by an information signal, the modulated carrier signal having a pre... | 12/30/1986 |
| 4631487 | Phase lock loop television signal demodulator A phase lock loop demodulator has its loop amplifier and filter designed such that the transfer function of the amplifier and filter is optimized for the presence of sound and color subcarriers. An equalizer circuit is included in the demodulator for equa... | 12/23/1986 |
