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| Number | Title | Issue Date |
| 7231084 | Color data image acquistion and processing A method and structure for implementing color image acquisition and processing. Combined and direct interpolation and conversion from a first to a second color space of sensor color data provided to a device capable of receiving and displaying color image data, foll... | 06/12/2007 |
| 7133554 | Method and apparatus for RGB color conversion that can be used in conjunction with lossless and lossy image compression Methods and apparatus are provided for performing reversible color conversion on digital image data using integer computer arithmetic. This color conversion provides an approximation of the luminance component to the luminance as perceived by the human visual system... | 11/07/2006 |
| 7123652 | Sampled data digital filtering system A digital filtering system for filtering sample data includes a delay network for delaying input sample data to provide multiple delayed sample data outputs. The filtering system also includes a filter network represented by a decomposed coefficient weighting matrix... | 10/17/2006 |
| 7034894 | Digital-to-analog conversion multiple-format video encoder A multiple-format video encoder stores values of the sine and cosine functions in a ROM. According to the externally specified video format, an address calculating circuit calculates the addresses at which to access the ROM. In the multiple-format video encoder, a l... | 04/25/2006 |
| 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 |
| 6931511 | Parallel vector table look-up with replicated index element vector Methods and apparatuses for looking up vectors in parallel using vector table look up operations. In one aspect of the invention, a method to look up a plurality of data items indexed by a vector of indices includes: generating a second vector of indices in a vector... | 08/16/2005 |
| 6914638 | Three-dimensional enhancement processing for television broadcasting signals A method and an apparatus of decoding a television broadcasting signal are disclosed. In one embodiment, an improved video decoder converts the video signal into a digitized video signal. The improved video decoder then separates luminance information and chrominanc... | 07/05/2005 |
| 6822694 | Signal processing apparatus According to the signal processing apparatus of the present invention, in a text signal processing circuit, predetermined signal processes are executed to a luminance signal Y and color difference signals U and V in which a ratio of sampling clocks is equal to (4:4:... | 11/23/2004 |
| 6686971 | Device and method for decoding television video signal Device and method for decoding a television video signal are suggested. The device includes a tint controller and a color space converter. The tint controller converts a plurality of color space converting coefficients which is used for converting color s... | 02/03/2004 |
| 6486923 | Color picture display apparatus using hue modification to improve picture quality A color picture display apparatus employs an array of light-emitting diodes or other light-emitting elements emitting different colors. A television signal is converted to monochromatic signals of the different colors. A color converter modifies the monoc... | 11/26/2002 |
| 6424374 | Hue adjusting method and hue adjusting device An object of the invention is to provide a hue adjusting device and a hue adjusting method that adjust finely the hue of a color image signal. The CPU calculates an off set matrix B that is in a pair with an off set matrix A to a central matrix X when the... | 07/23/2002 |
| 6411340 | Chrominance signal processing apparatus in video signal processing system A chrominance signal processing apparatus in a video signal processing system which has a simple configuration capable of achieving chrominance signal control and RGB transform functions using a single circuit. The chrominance signal processing apparatus ... | 06/25/2002 |
| 6362831 | Method and apparatus for performing plural matrix multiplication operations using a single coded look-up table In a method and apparatus for reducing the number of look-up tables when converting digitized luminance-chrominance color space signals to digitized RGB color space signals, first, second, third and fourth matrix multiplication operations of the digitized... | 03/26/2002 |
| 6327005 | Display device and method in digital TV A digital TV display device and method is disclosed including a display control unit providing selection signals, a look-up table unit having at least two look-up tables wherein at least one of the look-up tables is operative in a read mode and the other ... | 12/04/2001 |
| 6172714 | Color adjustment table system for YUV to RGB color conversion A method of providing conversion from YUV signals to RGB signals includes the steps of determining a correspondence value between each of the Y. U, and V pixel values and the corresponding one of the R, G, and B pixel values. Three tables are generated; a... | 01/09/2001 |
| 6025885 | Process for color transformation and a color video system In a process for color transformation from the input-side primaries (R, G, B) to image-side primaries (R", G", B") with a greater color stimulus specification region than that given by the input-side primaries (R, G, B), a color transformation is carried ... | 02/15/2000 |
| 5936683 | YUV-to-RGB conversion without multiplies using look-up tables and pre-clipping A video-input stream to a personal computer (PC) is converted from YUV format to RGB format. Two look-up tables are used. One look-up table has the Y and V components as address inputs, while the other look-up table has Y and U components as address input... | 08/10/1999 |
| 5929937 | Device and method for generating a composite color signal with digital QAM A device and method for generating a composite color signal are disclosed. The device includes a first memory unit for storing digital cosine data, a second memory unit for storing digital sine data, a first arithmetic unit for multiplying digital color d... | 07/27/1999 |
| 5909254 | Digital image processor for color image transmission A method and apparatus for increasing the processing speed or decreasing circuit complexity (or both) of a digital image processor by eliminating the conventional multiplication operation from the RGB to YUV and YUV to RGB transforms having NTSC compatibl... | 06/01/1999 |
| 5852683 | Method for automatic image merge A method for automatic merging two images having overlapped parts for a handy scanner. The method starts from defining a meaningful sample in a first image using fuzzy logic. Then, a two level searches based on A* algorithm are executed thereafter to find... | 12/22/1998 |
| 5844629 | Digital-to-analog video encoder with novel equalization A digital-to-analog video encoder method and apparatus having unique equalization are disclosed. The encoder converts digital video signals into one or more analog video formats using one or more digital-to-analog converters. Equalization is provided to c... | 12/01/1998 |
| 5838299 | RGB/YUV video convolution system An apparatus and a method are provided for smoothing out high frequency information in an interlaced computer generated display. A computer generated RGB signal is converted into a YUV signal, which is separated into its Y, U, and V components. The Y comp... | 11/17/1998 |
| 5831687 | Color video signal processing method and apparatus for converting digital color difference component signals into digital RGB component signals by a digital conversion In a color video signal processing method, color difference component signals are converted into RGB component signals by a digital to digital conversion so as to reduce a size of a processing unit used for the conversion. An analog composite signal is co... | 11/03/1998 |
| 5708481 | Fast current-mode analog circuit for converting video data signals between color space formats A color space converter is implemented using current mode analog circuitry to efficiently transform video data from a YCb Cr format to an RGB format in order to allow the display of video signals on a color monitor. The analog curren... | 01/13/1998 |
| 5703993 | RGB encoder for converting digital signals to analog signals and activating deactivating D/A converters according to a mode signal An encoder converts digital RGB signals into analog television signals. This encoder forms digital composite, luminance and chrominance signals based on digital signals input through an RGB input terminal. The encoder has a first, a second and a third D/A... | 12/30/1997 |
| 5671022 | Image processing system and method for converting YCbCr data composed of luminance and chroma into RGB data of three primary colors An image processing system and method capable of reducing hardware scale to improve processing speed. The G conversion section includes a third product producer for producing a third product from a first intermediate product corresponding to a first commo... | 09/23/1997 |
| 5638135 | Digital color encoder with improved circuitry A digital encoder includes a matrix circuit for synthesizing chrominance signals R-Y and B-Y based on RGB signals sampled at a predetermined sampling frequency which is an integral multiple of a chrominance subcarrier; low-pass filters; a delay circuit; a... | 06/10/1997 |
| 5565931 | Method and apparatus for applying gamma predistortion to a color image signal A system and method for generating gamma-predistorted video signals. A close approximation to the ideal gamma predistorted values of Y, Cr and Cb video signal components are generated from linear camera or computer output signals using at most a single ma... | 10/15/1996 |
| 5537563 | Devices, systems and methods for accessing data using a gun preferred data organization A processing system operates on data words each having first and second portions. A first memory stores the first portion of a first data word accessible by a first set of address bits received at first address inputs and a second set of address bits rece... | 07/16/1996 |
| 5510852 | Method and apparatus using symmetrical coding look-up tables for color space conversion A method and apparatus for performing color space conversion between digitized YCbCr components and digitized RGB components uses a color lookup table unit which is provided with transformation component values based on a selected one of two sets of conve... | 04/23/1996 |
| 5499058 | Digital color encoder using triangular wave modulation This invention provides a digital color encoder for digitizing color video signals. The encoder forms a digitized color video signal using logic function processing of the digitized luminance signal and color difference signals. The encoder provides an ou... | 03/12/1996 |
| 5272523 | Matrix circuit for separating color signal of a video camera into color-difference signals A matrix circuit for separating a color signal of a video camera into color-difference signals comprises an adder circuit for combining R, G, B signals into composite color signals R-G and B-G, time division circuit for subjecting the composite color sign... | 12/21/1993 |
| 5245327 | Color to monochrome conversion The present invention provides a contrast enhancing method and circuit for mapping color signals into signals for driving a display which is capable of displaying shades of gray. With the present invention a preliminary translation is first made between a... | 09/14/1993 |
| 5168361 | Arrangement for the transmission of digital television signals In an arrangement for transmitting digital television signals from a plurality of signal sources to at least one signal sink, an interconnection of several video signal sources which are of a simple structure and simple to operate and can be used universa... | 12/01/1992 |
| 5140408 | Color component signal converting apparatus having an input dependent switchable matrix Supplied selectively to a recording system circuit of a VTR are a first component signal comprising three primary color signals R, G and B and a second component signal comprising a luminance signal Y and two types of color difference signals PB | 08/18/1992 |
| 5124688 | Method and apparatus for converting digital YUV video signals to RGB video signals Method and apparatus process a composite video signal, converted it to component video signals which are processed digitally to produce reprogrammable digital RGB graphics signals. Specifically, a composite video signal is first digitized and then process... | 06/23/1992 |
| 5086339 | Videosystem for determining position of colored areas Video system for detection of colored areas on black/white patterned background which comprises a video camera for formation of a set of primary color signals R, G, B and a signal processing unit, which provides information about the recorded area based o... | 02/04/1992 |
| 4982179 | Composite video signal generation method and device A composite video signal generation method and device comprises circuits for processing a digital signal, by which the circuits can be integrated. The method comprises the steps of calculating a digital luminance signal and two digital chrominance signals... | 01/01/1991 |
| 4977398 | Color to monochrome conversion The present invention provides a contrast enhancing method and circuit for mapping color signals into signals for driving a display which is capable of displaying shades of gray. With the present invention a preliminary translation is first made between a... | 12/11/1990 |
| 4891689 | Color signal matrix circuits A color signal matrix circuit for producing first and second color difference signals from three primary color signals employs a reduced number of digital circuit elements and includes a first subtractor for producing a first color subtraction signal base... | 01/02/1990 |
