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| Number | Title | Issue Date |
| 7440598 | Adaptive filter In a method and filter and computer product for adaptive filtering of projection data acquired by a medical diagnostic apparatus, raw data-based filtering of the acquired projection data is undertaken using a filter with a filter kernel having a constant filter widt... | 10/21/2008 |
| 7405770 | Adaptive equalization method and system for reducing noise and distortion in a sampled video signal An adaptive equalization method and system for reducing noise and distortion in a sampled video signal improves the quality of output video information in both consumer and professional applications. A multi-band equalizer applied to the sampled video information re... | 07/29/2008 |
| 7394492 | Solid state image pickup device, method of driving solid state image pickup device, and camera using the solid state image pickup device Provided is an amplification type solid state image pickup device capable of increasing a saturation charge amount even when an increase in circuit scale is suppressed. In a pixel of the amplification type solid state image pickup device, a power source voltage is s... | 07/01/2008 |
| 7271851 | Adaptive color transient improvement A superior Color Transient Improvement technique is adaptive to the local image features, so that more natural color edge transition improvement can be accomplished. A gain control function is provided that depends on the local image feature so that different region... | 09/18/2007 |
| 7185242 | Digital display apparatus supporting error compensation and method thereof Disclosed are a digital display apparatus and method. The digital display apparatus includes a signal intensity detect unit, a tuner unit, a control unit, and a digital signal process unit. The signal intensity detect unit divides a digital input signal received thr... | 02/27/2007 |
| 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 |
| 6944579 | SIGNAL SEPARATION METHOD, SIGNAL PROCESSING APPARATUS, IMAGE PROCESSING APPARATUS, MEDICAL IMAGE PROCESSING APPARATUS AND STORAGE MEDIUM FOR RESTORING MULTIDIMENSIONAL SIGNALS FROM OBSERVED DATA IN WHICH MULTIPLE SIGNALS ARE MIXED Signals are separated by introducing a function having a monotonously increasing characteristic like an exponential type function as a cost function, and applying an adaptive algorithm that minimizes that cost function in terms of a signal separation matrix. That is... | 09/13/2005 |
| 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 |
| 6900848 | Crosstalk reduction in a video signal selector A video signal input selector is subject to cross coupling between selectable video signals. The input selector comprises a video amplifier coupled to amplify a video signal selected from said selectable video signals. A controllable switch has first and second elem... | 05/31/2005 |
| 6823086 | Adaptive spatial filter A system for adaptively filtering an image so as to reduce a noise component associated with the image includes an image analyzer for determining image parameters related to the image. The system also includes a spatial filter, having an adjustable kernel responsive... | 11/23/2004 |
| 6795588 | Noise detector, noise detection method, signal processor and signal processing method A ringing detector detects mosquito noise and ringing for outputting an image signal smoothed by a horizontal/vertical high-pass filter when mosquito noise and ringing are detected while outputting the image signal as such when neither mosquito noise nor ringing is ... | 09/21/2004 |
| 6747697 | Method and apparatus for digital image defect correction and noise filtering An adaptive median filter (40) provides dynamic detection and correction of digital image defects which are caused by defective or malfunctioning elements of a radiation detector array (20). The adaptive median filter receives (100) lines of pix... | 06/08/2004 |
| 6400415 | System and method for predistorting signals to be amplified A system and method for predistorting a signal which is to be amplified by a non-linear amplifier. The system and method uses additional predistortion circuits to eliminate the predistortion caused by amplifier input circuits and amplifier output circuits... | 06/04/2002 |
| 6052158 | Using equalized data for filter selection in HDTV receiver A digital television receiver includes a filter for minimizing NTSC interference with a received signal having a constant symbol rate. An equalizer has two one symbol delays for each tap. A filtered and a non-filtered version of the received signal are ap... | 04/18/2000 |
| 5933198 | Comb filter arrangement For activating or deactivating the comb filter function with pixel precision, a comb filter arrangement including a delay circuit (3) and a first matching circuit (1) having at least two storage cells, these circuits receive a picture signal, having a seq... | 08/03/1999 |
| 5847772 | Adaptive filter for video processing applications The invention provides methods and apparatus for filtering an input video frame sequence to be encoded. An odd-tap filter is used to generate a first interpolated pixel from a group of pixels in an even field of the video sequence. An even-tap filter is u... | 12/08/1998 |
| 5386244 | Brightness signal/color signal separation filter including an image correction judging circuit A filter for separating brightness signal and color signal from a composite color signal of NTSC type or PAL type, includes a horizontal color signal extracting filter, a vertical color signal extracting filter, a horizontal/vertical color signal extracti... | 01/31/1995 |
| 5243428 | Method and apparatus for concealing errors in a digital television A method and apparatus for concealing errors occurring during the transmission and or reception of digital television signals. Blocks of video information are received and if any of the blocks contain errors including missing coefficients and/or motion ve... | 09/07/1993 |
| 5063438 | Three dimensional encoding system for color television An encoding method for controlling the operation of a luminance comb filter encoder for processing a quadrature modulated subcarrier color television signal includes the steps of: separating spectral components at the vicinity of the subcarrier quadrature ... | 11/05/1991 |
| 5047841 | Encoder for television signals An encoder for encoding color video signals into a composite color video signal comprises a matrix 1 for providing luminance and color difference signals. Modulators 4, 5 modulate a chrominance signal. The luminance signal is supplied to a filter 7 contro... | 09/10/1991 |
| 4994906 | Digital luminance/chrominance separation apparatus A luminance and chrominance signal separator includes a linear and a non-linear type vertical comb filters which receives a digital composite video signal having the luminance and chrominance signal. The linear and the non-linear type vertical comb filter... | 02/19/1991 |
| 4951129 | Digital prefiltering of encoded video signals Digital prefiltering of luminance and chrominance components for an encoded video signal is performed to prevent cross color and dot crawl errors when the encoded video signal is decoded. The luminance component is filtered using a two- or three-dimension... | 08/21/1990 |
| 4939576 | Adaptive ringing reducer for television signal processing A method for reducing ringing artifacts caused by low pass filtering of baseband television signals comprises the steps of: detecting the occurrence of a horizontal transition in the baseband television signal as by measuring its magnitude and spectral sl... | 07/03/1990 |
| 4893176 | Adaptive comb filter for quadrature modulated color television systems A method for processing a quadrature modulated color television picture signal including a luminance component and a chrominance component to reduce cross-color and cross-luminance artificacts in a resultant signal includes in an encoding process the step... | 01/09/1990 |
| 4887306 | Adaptive temporal filter for ultrasound imaging system An improved temporal compounding technique for a medical ultrasound imaging system. The imaging system produces a plurality of pixel signals, such that each pixel signal comprises a time series of pixel values X(k), each pixel value being a function of th... | 12/12/1989 |
| 4731660 | Processing methods using adaptive threshold for removal of chroma/luminance cross-talk in quadrature-modulated subcarrier color television systems A comb filter for improved cross-color reduction with improved visible diagonal resolution is provided for processing a luminance component of a quadrature modulated color subcarrier television signal in the vicinity of the color subcarrier pass band. The... | 03/15/1988 |
| 4656502 | Color mixing or interference reduction circuit in color TV decoding circuits The luminance signal is connected to a transmission channel which includes a subtraction circuit (3) and a branch circuit, to apply a subtraction signal to the subtraction circuit. The branch circuit includes a band-pass filter connected to receive the lu... | 04/07/1987 |
| 4649505 | Two-input crosstalk-resistant adaptive noise canceller A two-input crosstalk-resistant adaptive noise canceller receives a primary input signal including a desired speech signal portion and an undesired noise signal portion and also receives a reference input signal having a reference noise input portion and ... | 03/10/1987 |
| 4638351 | Adaptive filter for use in color video signal processing A filter is disclosed for adaptively filtering a PAL or NTSC luminance signal so as to attenuate the high frequency portion of the luminance band, wherein the chrominance information lies, when movement is detected. This reduces cross-color in the reprodu... | 01/20/1987 |
| 4573070 | Noise reduction system for video signals Noise reduction on a video signal is achieved by an adaptive filter system which is capable of automatic changes in filter parameters. This inventive concept includes an automatic method of independently changing both the width and center frequency of the... | 02/25/1986 |
| 4470065 | Adaptive error concealment using horizontal information determination from adjacent lines An adaptive error concealment system uses either a horizontal or vertical average as a replacement pixel for an erroneous pixel. The choice is dependent upon the amount of horizontal information in at least one adjacent horizontal line. This avoids errors... | 09/04/1984 |
| 4377820 | Adaptive error concealment Method and apparatus for replacing defective video information in a video signal line comprises sampling the video signal. Video information from the preceding in-phase pixel and the subsequent in-phase pixel are averaged to form a replacement pixel. Weig... | 03/22/1983 |
