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| Number | Title | Issue Date |
| 7956931 | Delay circuit and video signal processing circuit using the same A delay circuit is disclosed. A switched-capacitor group includes a plurality of switched-capacitor units, each of which have a switching element and a capacitive element charged/discharged by turning on/off the switching element. The switched-capacitor units are co... | 06/07/2011 |
| 7535514 | Apparatus and method for decoding SECAM chrominance signal We describe an apparatus and method for decoding a SECAM chrominance signal. The apparatus may include a band-pass filter to separate the chrominance signal from the composite video baseband signal. A down-mixer down mixes the chrominance signal from a high to a low... | 05/19/2009 |
| 7444032 | Demodulation and phase estimation of two-dimensional patterns A method (100) of demodulating a real two-dimensional pattern (110) is disclosed. The method (100) estimates (120, 130) a quadrature two-dimensional pattern from the real two-dimensional pattern (110) using a smooth phase only tran... | 10/28/2008 |
| 7355655 | Systems and methods for separating luma and chroma information in a composite video signal Systems and method are provided for luma-chroma separation. A demodulator system demodulates a composite video signal to produce at least two baseband chroma signals. A given baseband chroma signal contains chroma information for one of a plurality of video frames c... | 04/08/2008 |
| 7355653 | Video signal processing circuit and video signal processing method When an A/D-converted composite video signal is directly outputted while a system clock frequency is switched so as to execute the determination of a signal system, a digital chroma demodulation system prevents the images displayed by the composite video signals fro... | 04/08/2008 |
| 7342953 | Synchronization detection circuit A synchronization detection circuit includes: a matched filter 105 for outputting a correlation value, between a spreading code and data that is obtained by sampling a code spread signal 101, using a sampling clock for one chip cycle; a sampling clock ... | 03/11/2008 |
| 7321397 | Composite color frame identifier system and method A color frame identifier circuit generates a pseudo-subcarrier signal and compares the pseudo-subcarrier signal to a sliced color burst of at least one selected line in a video frame. Based on this comparison, a processing circuit determines the color frame. ... | 01/22/2008 |
| 7319492 | Open loop subcarrier synchronization system A system and method for synchronizing signals having respective sub-carriers in a signal processing system. Various aspects of the present invention may comprise method steps and structure that receive a sampled signal with an associated sub-carrier. Various aspects... | 01/15/2008 |
| 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 |
| 7250985 | Color demodulation circuit A color demodulation circuit that can complement an unstable state of an output from an ACC circuit and can obtain stable color-difference outputs, regardless of a burst signal in a chrominance carrier signal. Normally, a selector connects an output from a first mul... | 07/31/2007 |
| 7239341 | Vector waveform rotation device A vector waveform rotation device (60) for rotating a vector waveform displayed on a vector comprises rotation amount setting means (5′) for holding a rotation amount α, and means (6′) for inputting a first color difference signal (B-Y sign... | 07/03/2007 |
| 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 |
| 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 |
| 7046305 | Method and apparatus for enhancing green contrast of a color video signal Method and apparatus for automatically enhancing the foliage display of a color signal includes providing the color signal in multiplexed form having alternating first and second components, the first component being substantially aligned with a flesh tone color spa... | 05/16/2006 |
| 6999093 | Dynamic time-of-day sky box lighting A background (sky box) in a video game or other virtual reality environment dynamically changes as a function of a parameter, producing a more realistic display. Luminance-only texture and color texture data are employed to create the background. The color texture d... | 02/14/2006 |
| 6956622 | Method and apparatus for modulating video signals A luminance component of a video signal is modulated in a first frequency band. A chrominance component of the video signal is modulated in a second frequency band. The modulated luminance component and the modulated chrominance component are then transmitted across... | 10/18/2005 |
| 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 |
| 6947096 | Video processing apparatus for converting composite video signals to digital component video signals A chroma-decoder 1 has two SRCs 17 and 21. The first SRC 17 performs down-conversion, changing the sampling rate of a composite video signal sampled with a system clock signal Cs to the sampling rate (14.3 MHz) of an NTSC signal. The sign... | 09/20/2005 |
| 6943847 | FM demodulator for SECAM decoder A SECAM decoder and an FM modulator therefor are disclosed, in which a demodulated color signal is provided to indicate deviations in the frequency of modulated color information from a nominal subcarrier frequency. The demodulator comprises numerator and denominato... | 09/13/2005 |
| 6888579 | Method and system for tint control for component video signals A method and system are provided for controlling tint of component video signals. The system includes a first input for receiving a first component video signal; a second input for receiving a second component video signal; circuitry including a first differential a... | 05/03/2005 |
| 6882372 | Method and system for color balance control for component video signals A method and system are provided for balance control for component video signals. The system and method of the present disclosure allow for adjusting or compensating for possible color encoding errors, as well as allowing individual viewer preferences to be accommod... | 04/19/2005 |
| 6795083 | Color enhancement of analog video for digital video systems A method and system enhances the color of an image by manipulating the chrominance and/or luminance signals of the image. Specifically, a color enhancement system sharpens color changes for better picture quality on digital display systems. In one embodiment of the ... | 09/21/2004 |
| 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 |
| 6690430 | Chrominance signal demodulation circuit A chrominance signal demodulation circuit capable of precisely processing a chrominance signal demodulation even when a phase of an inputted chrominance signal is abruptly changed due to a tape track skew error. A first and second color difference signals... | 02/10/2004 |
| 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 |
| 6538702 | Digital color signal reproducing circuit A color signal reproducing circuit having A/D converter 101, sync separator 102, YC separator 103, gain controller 105, multipliers 106 and 107, low-pass filters 108 and 109, burst-period cumulative adders 110 and 111, SINCOS generator 112, clock generato... | 03/25/2003 |
| 6522366 | Dual-loop PLL circuit and chrominance demodulation circuit A dual-loop PLL circuit is provided with a clamping circuit 12, an A/D conversion circuit 14, a reference color burst outputting circuit 18, a PLL circuit 24, and phase detecting circuit 34. The phase of a reference color burst KK outputted from the circu... | 02/18/2003 |
| 6496227 | System with chrominance delay lines A system with chrominance delay lines has a first sampled channel including at least one smoothing filter, and has a second unsampled channel. A continuous bypass filter is placed in the second channel to balance the pulse response from these two channels... | 12/17/2002 |
| 6473091 | Image processing apparatus and method An image processing apparatus and method which can reduce the size of circuits for -blending and dithering and realize high speed processing which perform in parallel processing for finding an amount of update of present image data to be drawn with... | 10/29/2002 |
| 6459457 | Adaptive color comb filter A color comb filter (46), video decoder (40) and method for separating chroma (U,V) and luma (Y) signals from a composite video signal (41). The comb filter (46) includes circuitry (48) for generating color filter selections for filtering a chroma video s... | 10/01/2002 |
| 6433837 | Demodulator, particularly for a SECAM chrominance signal, with double frequency adjustment The demodulating device for a chrominance signal includes an oscillator with a controlled frequency, and an adjuster for adjusting the oscillator frequency as a function of a charge voltage of a memory capacitor. The adjuster preferably includes a fine ad... | 08/13/2002 |
| 6377316 | Tuner with switched analog and digital modulators A television receiver includes a tuner for receiving either analog or digital signals. Separate analog and digital demodulators are selectively coupled to the tuner through an RF switch that is controlled by the signal from a sync detector in the output o... | 04/23/2002 |
| 6348955 | Tuner with switched analog and digital demodulators A television receiver includes a tuner for receiving either analog or digital signals. Separate analog and digital demodulators are selectively coupled to the tuner through an RF switch that is controlled by a sync detector in the output of the analog dem... | 02/19/2002 |
| 6323913 | Circuit configuration for color decoding and decimation for a video signal The circuit configuration provides for the combined color decoding and decimation of a video signal, particularly for picture-in-picture insertion in television sets. The color subcarrier is determined from a video signal for the purpose of recovering the... | 11/27/2001 |
| 6201578 | Apparatus with A/D converter for processing television signal An apparatus for processing television signal including an A/D converter which converts a television signal (a luminance signal) into a digital television signal. A sampling circuit samples television signal data outputted from the A/D converter in respon... | 03/13/2001 |
| 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 |
| 6151080 | Secam chrominance signal demodulator with two red-blue channels and a single oscillator The SECAM chrominance signal demodulator includes an oscillator with a controlled frequency, a phase comparator with a first input connected to an oscillator output, a second input to receive a chrominance signal, and an output connected to an input loop ... | 11/21/2000 |
| 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 |
| 6061101 | Digital color signal modulating apparatus An apparatus to modulate the digital color signal using a simple circuit that utilizes neither multiplier nor ROMs to multiplying a sine wave and cosine wave. The digital color signal modulating apparatus includes a first selector, a second selector 3, an... | 05/09/2000 |
