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| Number | Title | Issue Date |
| 7701514 | Recursive noise reduction with still pixel detection A system and system for performing adaptive recursive noise reduction with still pixel detection on a video stream is presented. After processing a field pixels that were modified are stored in the field so that processing of later fields uses the modified pixels. F... | 04/20/2010 |
| 7443454 | Method for treating inter-frame motion in a composite video signal A method for treating inter-frame motion in a series of consecutive signal frames of a composite video signal includes the steps of, for an evaluation pixel position in each frame of a test frame-set including three successive signal frames: (a) determining whether ... | 10/28/2008 |
| 7324167 | High-quality twisted-pair transmission line system for high-resolution video A system comprising a first filter having an input and an output adapted to compensate for the characteristics of a first length of twisted-pair wire is disclosed. A first bypass path has an input and an output for bypassing the first filter. A second filter has an ... | 01/29/2008 |
| 7280159 | Method and apparatus for cross color and/or cross luminance suppression A method and apparatus for cross color and/or cross luminance suppression. The apparatus checks for three conditions in determining the stillness of an image. Similarity between two frames, which are one frame apart, is examined. Similarity between two adjacent fram... | 10/09/2007 |
| 7280160 | Apparatus for and method of adaptively processing video signals based on a noise state An apparatus for and a method of adaptively processing video signals based on noise states. The method includes, a memory device that stores a look-up table in which optimal filter tap coefficients corresponding to a number of noise levels are registered; a noise me... | 10/09/2007 |
| 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 |
| 7268835 | Device and method for noise reduction of a video signal The disclosure relates to a device and to a method for noise reduction of a video signal. The device is comprised of the following components. A motion-compensated interpolation means, a recursive filter intended to receive the output of the recursive filter motion-... | 09/11/2007 |
| 7218791 | Image processing device and method, and imaging device The present invention relates to an image processing apparatus for generating an image having a high density in the direction of time and having a natural-looking motion blur. The correlation calculators 103 and 104 respectively calculate a correlation... | 05/15/2007 |
| 7061537 | Adaptive deflicker method and adaptive deflicker filter An adaptive deflicker method for use in converting a non-interlacing scan data into an interlacing scan data is disclosed. The method includes the steps of receiving a non-interlacing scan data, wherein the non-interlacing scan data includes plural scan lines, proce... | 06/13/2006 |
| 7050703 | Video recording and playback apparatus and method A video recording and playback apparatus and method by which accurate motion detection can be executed is disclosed. A noise reduction processing circuit performs noise reduction processing for video data inputted thereto from a switch and outputs resulting video da... | 05/23/2006 |
| 7047556 | Method and apparatus for equalizing video transmitted over twisted pair cable A apparatus and apparatus for compensating for video insertion loss due to transmission over long twisted pair cable lines is presented. Transmission of video over twisted pair cable is advantageous because of its superior cost advantage over coaxial cable. However,... | 05/16/2006 |
| 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 |
| 6947099 | Automatic chroma control circuit with controlled saturation reduction An ACC system includes a controllable amplifier having an input coupled to receive a chroma input signal and an output for providing an chroma output signal of controllable amplitude. A first feedback path, including a cascade connection of means for providing a sig... | 09/20/2005 |
| 6937287 | Video processing apparatus and method In order to reduce the total capacity of a ROM used for adjustment of the black level and the white level of a digitized luminance signal for a television receiver, for example, a comparator compares the input luminance signal with a predetermined threshold value, a... | 08/30/2005 |
| 6909459 | Method of and apparatus for extending signal ranges of digital images The invention is a method and apparatus to extend the signal range of a digital image beyond the nominal sensor or data format range. The method and apparatus automatically acquires a scaled series of source data, applies noise reduction to the source data, and cons... | 06/21/2005 |
| 6847408 | Method and apparatus for reducing noise in an image sequence A method and apparatus for reducing noise in an image sequence is provided. Images in the image sequence are recursively filtered on an area-by-area or, for example, pixel-by-pixel, basis. A pixel from an image is compared to a similarly located pixel from a previou... | 01/25/2005 |
| 6459734 | Motion detection circuit and a noise suppression circuit including the same An interframe difference signal is generated from the video signal and its one-frame delayed video signal. A filter removes a carrier color signal from the interframe difference signal to output the interframe difference luminance signal. A first motion j... | 10/01/2002 |
| 6122017 | Method for providing motion-compensated multi-field enhancement of still images from video A method and system for combining the information from one video field, or multiple video fields in a single, high quality still image. A reference field and auxiliary fields are selected and an orientation map is constructed for the reference field. Moti... | 09/19/2000 |
| 6100937 | Method and system for combining multiple images into a single higher-quality image A method and system for combining a set of n still image frames into a single reduced noise still image. The invention reduces visible noise, along with some television color artifacts, in still images captured from a video stream by combining data from m... | 08/08/2000 |
| 5929936 | System for reducing noise in image data through recursive operation A noise reducer to which image data obtained by decoding coding data using a DCT coding is supplied. The noise reduser is comprised as follows. Noise extracting unit for extracting a noise component, first and second noise cancelling unit for cancelling t... | 07/27/1999 |
| 5808696 | Color television video signal regenerator, including three video signal regeneration channels, with the input of one channel capable of receiving wider pass-band signals than the other two channels A video signal regenerator in color television comprises two video signal regeneration channels each of which has a video signal front detector (5-7) electrically connected to a driving input of a video holding sampler (1-3), while the third video signal ... | 09/15/1998 |
| 5400085 | Chroma noise reduction device A chroma noise reduction device comprises an 1H delay element, first and second variable delay units, variable amplifier, first and second adder amplitude restricting circuit, first and second subtracters and first, second and third phase detectors. The f... | 03/21/1995 |
| 5247354 | Noise reducing apparatus for reducing noise in moving video image signals A noise reducing apparatus adapted effectively reduces the noise produced in the edge portion during the movement of inputted images may without causing the residual images or the like on the output images even if the inputted images move fast, and even i... | 09/21/1993 |
| 5196935 | Method and an apparatus for reducing noise of the pulsive type in digital video receiver sets The invention relates to a method for reducing noise of the pulsive type in digital video receiver sets. The method consists of picking up a noise-affected sample of a video signal and replacing it with a weighted average of samples located in the contour... | 03/23/1993 |
| 5032913 | Electronic endoscope system equipped with color smear reducing means An object being frame-sequentially illuminated by beams of illumination light in different wavelength ranges is imaged by an imaging element of an electronic endoscope. A time-serial image signal is subjected to signal processing to display a color pictur... | 07/16/1991 |
| 4987481 | Video noise reduction system Circuitry for selectively reducing noise which results from film granularity, circuitry imperfections and other sources of random signal degradation by averaging, non-recursively, between 2 and 9 frames of digitized video information. By such averaging, s... | 01/22/1991 |
| 4984070 | Picture quality improving apparatus capable of reducing deterioration of interpolated signal A picture quality improving apparatus includes a multiplexer for multiplexing a digital luminance signal and a digital color difference signal upon reception thereof and outputting a first multiplex signal. A noise reduction circuit reduces a noise compon... | 01/08/1991 |
| 4928165 | Noise reduction circuit for a chrominance signal of a using frame correlation A circuit for reducing noises of a chrominance signal in a television receiver. The circuit includes a decoder for decoding first and second color difference signals, each including a noise component from a received chrominance signal, a signal subtractio... | 05/22/1990 |
| 4888642 | Video signal processor A video signal processing circuitry which comprises a first arithmetic circuit adapted to receive a line sequential signal, a first 1H delay circuit for delaying an output from the first arithmetic circuit for a length of time equal to one horizontal peri... | 12/19/1989 |
| 4779128 | Digital low-pass filter with improved frequency reduction characteristics The invention relates to a digital low-pass filter which effects a frequency reduction by a factor which is equal to the ratio w/2 between the frequency of the input signal and the frequency of the output signal, wherein w is an odd integer. The input sig... | 10/18/1988 |
| 4766486 | Carrier chrominance signal processing circuit A carrier chrominance signal processing circuit for use in an apparatus such as a video tape recorder is based upon a feedback comb filter for enhancing the S/N ratio of the playback carrier chrominance signal, and circuits for detecting vertical coherenc... | 08/23/1988 |
| 4760449 | Video signal processing apparatus A video signal processing apparatus incorporates a 1H or 2H delay circuit, wherein H is a horizontal synchronization period. The output of the delay circuit is fed back to the input thereof so as to average the noise, thus raising the signal S/N ratio. Th... | 07/26/1988 |
| 4737850 | Apparatus for noise reducing composite video signal In field/frame recursive filters for providing noise reduction to composite video signal, inversion of the chrominance component of the composite video signal is obviated by selecting nearest neighbor in-phase field/frame delayed signals for recursion. Th... | 04/12/1988 |
| 4717951 | Adaptive digital filter A picture-in-picture television receiver for which the viewer may change the size of the inset image includes an adaptive anti-aliasing filter. Composite video signals which produce the inset image are applied to a separation filter which attenuates the c... | 01/05/1988 |
| 4670775 | Inter-dimensional chrominance noise reduction system Method and apparatus for controlling operation of a time domain noise reduction system in a color television picture signal path by: detecting spatial picture characteristics in the path and detecting occurrence of temporal picture changes on a field by f... | 06/02/1987 |
| 4658285 | Video signal noise reduction apparatus A recursive filter for noise reducing composite video signal separately processes the luminance and chrominance components of the composite signal but requires only a single frame of storage. Input composite video signal is separated into luminance and ch... | 04/14/1987 |
| 4652907 | Apparatus for adaptively controlling a video signal recursive filter A video signal recursive filter includes circuitry for controlling the integration time of the filter. The control circuitry develop a motion-threshold value responsive to the noise content of signal differences developed by subtracting a processed signal... | 03/24/1987 |
| 4646138 | Video signal recursive filter with luma/chroma separation A motion adaptive recursive filter is modified to separate luminance or chrominance signal from composite video. The filter proportions and sums current and frame delayed signal recursively to provide signal-to-noise enhanced luminance signal with the chr... | 02/24/1987 |
| 4568969 | Noise eliminating circuit A chroma signal is supplied to a comb-filter for eliminating noise component in the chroma signal. The output signal of the comb-filter and the input chroma signal are both supplied to a correlation circuit. The correlation circuit outputs the same signal... | 02/04/1986 |
| 4513311 | Video signal processing unit A processing circuit for a composite color television signal formed of a chrominance component and a luminance component includes a comb filter of the type including a 1H delay line. In order to process the chrominance component, the comb filter is follow... | 04/23/1985 |
