Adaptive Patents (Class 348/610)
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Patent number: 11922611Abstract: Various methods and systems are provided for accelerated image rendering with motion compensation. In one embodiment, a method comprises calculating motion between a preceding image frame and a target image frame to be rendered, rendering a small image with a size smaller than a target size of the target image frame based on the calculated motion, and generating the target image frame at the target size based on the small image, the calculated motion, and a reference image frame. In this way, high-quality image frames for a video stream may be generated with a reduced amount of rendering for each frame, thereby reducing the overall processing resources dedicated to rendering as well as the power consumption for image rendering.Type: GrantFiled: October 15, 2020Date of Patent: March 5, 2024Assignee: Pixelworks Semiconductor Technology (Shanghai) Co. Ltd.Inventors: Guohua Cheng, Junhua Chen, Neil Woodall, Hongmin Zhang, Yue Ma, Qinghai Wang
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Patent number: 11689191Abstract: A delay circuit applies a one sample delay to a first digital sinusoid signal and outputs a delayed digital sinusoid signal. The first digital sinusoid signal and the delayed digital sinusoid signal are then added to each other by an adder circuit to generate an added digital sinusoid signal. A gain scaling circuit applies a scaling factor to the added digital sinusoid signal to generate a second digital sinusoid signal. Samples of the first and second digital sinusoid signals are alternately selected by a multiplexing circuit to generate a third digital sinusoid signal having twice as many samples as the first digital sinusoid signal over a same sinusoid period.Type: GrantFiled: February 16, 2022Date of Patent: June 27, 2023Assignee: STMicroelectronics International N.V.Inventor: Ankur Bal
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Patent number: 11651797Abstract: Method involving: providing an object in the video that at least partially and at least occasionally is presented in frames of a video; detecting the object in the video, wherein said detection comprises detecting feature reference points of the object; tracking the detected object in the video, wherein the tracking comprises creating a mesh that is based on the detected feature reference points of the object and aligning the mesh to the object in each frame; generating a first set of node points on the created mesh based on a request for changing proportions; generating a second set of node points based on the first set of node points; and transforming the frames of the video in such way that the object's proportions are transformed in accordance with the second set of the node points using the mesh.Type: GrantFiled: August 15, 2022Date of Patent: May 16, 2023Assignee: SNAP INC.Inventor: Elena Shaburova
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Patent number: 10783302Abstract: A circuit module includes a model circuit and a look-up table (LUT). The model circuit generates an output signal based on one or more input signals, and corresponds to a digital circuit. The LUT stores one or more control signals and one or more operation parameters that are to be used to implement the model circuit. The one or more control signals and the one or more operation parameters correspond to an index determined by a combination of the one or more input signals and the output signal.Type: GrantFiled: June 24, 2019Date of Patent: September 22, 2020Assignees: SK hynix Inc., Seoul National University R&DB FoundationInventors: Seuk Son, Seungheon Baek, Youngjun Kim, Jaeha Kim
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Patent number: 10432971Abstract: Computer implemented methods of compressing and decompressing image data are described. A discrete cosine (DCT) transformation is applied to each of a plurality of pixel blocks to generate a set of DCT coefficients for each pixel block comprising a DC DCT coefficient and a plurality of AC DCT coefficient. Each set of DCT coefficients is quantized. A DC array is formed from the set of quantized DC OCT coefficients and an AC matrix is formed from the set of quantized AC DCT coefficients. The AC matrix is compressed by eliminating blocks of data having only zero values and forming a reduced AC array from blocks including non-zero values. The reduced AC array is compressed using a key to form a coded AC array. The DC array and coded AC array are arithmetically coded to form arithmetically coded data which is included in a compressed image file. The decompression method is essentially the reverse process.Type: GrantFiled: February 26, 2016Date of Patent: October 1, 2019Assignee: Sheffield Hallam UniversityInventors: Mohammed Siddeq, Marcos Rodrigues
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Patent number: 9906267Abstract: One embodiment provides a network device that includes PHY circuitry comprising transmit circuitry (Tx) and receive circuitry (Rx), wherein the Tx and Rx circuitry are configured to be coupled to a respective channel to communicate with an external device via the channels, wherein the network device configured to communicate with the external device using an Ethernet communications protocol; and test circuitry.Type: GrantFiled: October 19, 2015Date of Patent: February 27, 2018Assignee: INTEL CORPORATIONInventors: Richard Mellitz, Adee O. Ran
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Patent number: 9836823Abstract: A method and a device for enhancing an edge of an image are provided. The method includes: obtaining a first gradient value of a pixel; determining whether the pixel is at a rough edge according to the first gradient value; if yes, obtaining a first edge enhancement value of the pixel and obtaining a first edge enhancement result of the pixel according to the first edge enhancement value; if no, obtaining a second gradient value of the pixel; determining whether the pixel is at a tiny edge according to the second gradient value; if yes, obtaining a second edge enhancement value of the pixel and obtaining a second edge enhancement result of the pixel according to the second edge enhancement value; if no, obtaining the pixel value of the pixel as the edge enhancement result of the pixel; and repeating above steps until each pixel of the image is processed.Type: GrantFiled: May 16, 2014Date of Patent: December 5, 2017Assignee: BYD COMPANY LIMITEDInventors: Huaren Liu, Shuijiang Mao, Jingjun Fu, Wei Feng
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Patent number: 9805734Abstract: From a mixed signal in which a first signal and a second signal are mixed, the second signal is removed at low processing cost and without delay. As a result, an estimated first signal which has low residue of the second signal and low distortion is obtained. An estimated first signal is generated by subtracting a pseudo second signal which is estimated to be mixed in a first mixed signal in which a first signal and a second signal are mixed from the first mixed signal. The pseudo second signal is obtained by a first adaptive filter using a second mixed signal in which the first signal and the second signal are mixed in a different proportion from the first mixed signal. A coefficient update amount of the first adaptive filter is made smaller as compared with a case when the estimated first signal is smaller than the first mixed signal, in case the estimated first signal is larger than the first mixed signal.Type: GrantFiled: September 15, 2011Date of Patent: October 31, 2017Assignee: NEC CORPORATIONInventor: Akihiko Sugiyama
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Patent number: 9659346Abstract: An image processing apparatus includes: a target position selecting unit to select a pixel position on an input image, as a target position; a candidate line setting unit to set two or more sets of candidate lines including a pixel with a value, in the vicinity of the target position; a weighted-value calculating unit to calculate a weighted value that corresponds to a degree of expectation that the target position and the pixel position on the candidate line are on the same pattern; a direction classifying unit to selectively determine a set of candidate lines that are close to a direction of a pattern of the target position in accordance with the weighted value of each pixel on the candidate lines; and a first interpolated-value calculating unit to calculate a pixel value of the target position in accordance with the weighted value of each pixel on the candidate lines.Type: GrantFiled: November 20, 2014Date of Patent: May 23, 2017Assignee: Sony Semiconductor Solutions CorporationInventors: Shigeki Nakamura, Yasunobu Hitomi, Tomoo Mitsunaga
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Patent number: 9661327Abstract: Apparatus comprising an encoder configured to encode a video signal captured from a camera, and a low-light enhancement module configured to apply a low-light enhancement to the video signal. The low-light enhancement is performed in a color space comprising two color channels representing color, and an achromatic channel representing light level. The enhancement comprises: detecting at least a first classification indicative of disturbance in the video signal due to capture in low light; and in response to detecting this classification, applying a low-light processing operation to at least one of the color channels to reduce a number of bits incurred by color in the encoding, such that an increased number of bits is spent on the achromatic channel when encoded by the encoder.Type: GrantFiled: November 27, 2013Date of Patent: May 23, 2017Assignee: Microsoft Technology Licensing, LLCInventor: Mattias Nilsson
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Patent number: 8917354Abstract: A method for detecting motion in video fields of video data, comprises the steps of: calculating texture information for a pixel in the video fields; determining a threshold value as a function of the calculated texture information; calculating a differential value for the pixel; and detecting motion in the video fields as a function of the determined threshold value and the calculated differential value.Type: GrantFiled: September 30, 2013Date of Patent: December 23, 2014Assignee: Amlogic Co., Ltd.Inventors: Dongjian Wang, Xin Hu, Xuyun Chen
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Patent number: 8908107Abstract: A remote control system includes a remote control device and an electronic device. The remote control device includes an input element, a wireless transmitter to transmit an absolute coordinate signal and a motion signal and a control unit electrically connected to the input element and the wireless transmitter. The electronic device includes a wireless receiver and a display screen. The wireless receiver receives the absolute coordinate signal and the motion signal, and displays the absolute coordinate signal at the display screen via a cursor. When the electronic device does not receive the motion signal, the absolute coordinate signal is not operated on an application program of the electronic device. When the electronic device receives the motion signal, the absolute coordinate signal is operated on the application program.Type: GrantFiled: May 27, 2013Date of Patent: December 9, 2014Assignee: ASUSTeK Computer Inc.Inventor: Cheng-Shen Wu
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Patent number: 8861885Abstract: Techniques in accordance with the following disclosure enable digital images to be filtered (smoothed) to reduce noise and, at the same time, preserve the image's underlying structure. In general, image pixels are analyzed to identify those that participate in, or belong to, structure within the image and those that do not. For those pixels determined to be part of the image's structure, the direction of that structure is determined and filtering or smoothing along that direction is provided. Contrast enhancement in a direction perpendicular to the detected edge's direction may also be provided.Type: GrantFiled: August 26, 2009Date of Patent: October 14, 2014Assignee: Apple Inc.Inventor: Mark Zimmer
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Patent number: 8842931Abstract: A system, method, and computer program product are provided for reducing noise in an image using depth-based on sweeping over image samples. In use, each noisy pixel of an image having noise is identified. Additionally, for each noisy pixel, at least one sample included in each of a plurality of neighboring pixels to the noisy pixel is identified. Furthermore, the samples are swept over at least partially in a depth-based order to identify a value for the noisy pixel that reduces the noise.Type: GrantFiled: February 18, 2011Date of Patent: September 23, 2014Assignee: NVIDIA CorporationInventors: Peter Schuyler Shirley, Timo Aila, Jonathan Michael Cohen, Eric B. Enderton, Samuli Laine, Morgan McGuire, David Patrick Luebke
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Patent number: 8837849Abstract: A method for applying filters to digital images with minimal amplification of image noise, comprising filtering the digital image with an EPDR edge-preserving detail-reducing filter, determining a matrix from the filtered image as a result of one or more structure adaptive functions, and modifying the digital image using the filter, adjusted by the matrix values, to produce an enhanced digital image. The order of processing may be inverted, by first determining the matrix and then filtering the matrix with the edge-preserving detail-reducing filter.Type: GrantFiled: June 26, 2008Date of Patent: September 16, 2014Assignee: Google Inc.Inventor: Nils Kokemohr
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Patent number: 8831375Abstract: A method of obtaining variance data or standard deviation data for efficiently reducing noise in an image is provided. The method includes (a) dividing an image into a plurality of clusters; (b) checking frequency data of data values of pixels included in each cluster; (c) obtaining a weighted average of the data values of the pixels included in each cluster; (d) obtaining a variance or a standard deviation of the data values of the pixels included in each cluster by using the weighted average; and (e) obtaining variance data or standard deviation data in accordance with weighted averages by using the weighted average and the variance or the standard deviation in each cluster. A digital photographing apparatus is also provided that includes a recording medium storing variance data or standard deviation data for efficiently reducing noise in an image which is obtained in accordance with the above method.Type: GrantFiled: December 10, 2008Date of Patent: September 9, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Soon-geun Jang, Eun-sun Ahn, Jin-pyo Gwak
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Patent number: 8797462Abstract: A band processing circuit which generates image signals corresponding to different frequency bands from an image signal in which signals corresponding to different colors are arranged and which suppresses noise by synthesizing the image signals of the different frequency bands, a sampling circuit which generates image signal corresponding to the colors by sampling the image signal input from the band processing circuit in accordance with a predetermined arrangement, and a luminance/color generation circuit which generates a luminance signal in which aliasing is suppressed using an image signal output from the sampling circuit.Type: GrantFiled: February 10, 2011Date of Patent: August 5, 2014Assignee: Canon Kabushiki KaishaInventor: Shinya Hirai
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Patent number: 8639054Abstract: A correlation judgment part judges a correlation direction on each pixel. In a case where a correlation direction of a specified pixel is a vertical direction and the correlation thereof is small in any other direction, it is judged that the specified pixel is a pixel on an edge in the vertical direction. Then, a noise removal filtering operation is performed on the specified pixel by using pixels on a line in the vertical direction and an edge enhancement operation is performed by using pixels on a line in a horizontal direction.Type: GrantFiled: July 21, 2008Date of Patent: January 28, 2014Assignee: MegaChips CorporationInventor: Hiromu Hasegawa
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Patent number: 8045607Abstract: A method applied to an equalizer includes receiving an input data-stream having a training sequence component with a first number of symbols and a data component with a second number of symbols, wherein the first number plus the second number equals a third number; when a symbol number is not greater than the first number, training the training sequence component to generate a first trained coefficient set; when the symbol number is between the first number and the third number, recycling the training sequence component to generate a recycled training sequence component, and training the recycled training sequence component to generate a second trained coefficient set; storing the input data-stream to generate a delayed input data-stream when the symbol number is not greater than the third number; and applying the second trained coefficient set to the equalizer when the symbol number is greater than the third number.Type: GrantFiled: February 19, 2008Date of Patent: October 25, 2011Assignee: Himax Technologies LimitedInventor: Jeng-Shiann Jiang
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Patent number: 8000552Abstract: An apparatus for scaling an input image is disclosed. The apparatus includes a resolution determining circuit and a scaler. The determining circuit determines the resolution of the input image. The scaler includes a scaling filter with an adjustable number of filter taps and scales the input image to output scaled pixels, wherein an amount of taps of scaling filter corresponds to the resolution of the input image.Type: GrantFiled: March 12, 2007Date of Patent: August 16, 2011Assignee: Realtek Semiconductor Corp.Inventor: Po-Wei Chao
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Patent number: 7991235Abstract: A light compression method that error diffuses image data provided with luminance and chrominance channels. During error diffusion, a higher number of bits are allocated to the luminance channel. A decompression method for the image data based on sigma filtering is also provided. By manipulating the bits in the luminance and chrominance color spaces, the image output quality may be increased in reconstructed images.Type: GrantFiled: February 27, 2007Date of Patent: August 2, 2011Assignee: Xerox CorporationInventors: Zhigang Fan, Francis Tse, John Christopher Cassidy
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Patent number: 7821578Abstract: A video noise reducer reduces the noise artifacts in a video signal. The video noise reducer is reconfigurable to provide spatial noise reduction and temporal noise reduction in either a parallel or cascade architecture. The video noise reducer is self-calibrating by providing estimation modules that estimate the amount of noise in the video signal and a noise injector that confirms the measurement against a known quantity of noise. The video noise reducer is adaptive to solutions in hardware or a combination of hardware and firmware. The video noise reducer is also optimized for efficient memory usage in interlaced video signal processing applications.Type: GrantFiled: April 7, 2006Date of Patent: October 26, 2010Assignee: Marvell World Trade Ltd.Inventors: Bharat Pathak, Nikhil Balram
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Patent number: 7808558Abstract: 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 regions of the image can be treated differently. Further, a correction signal is controlled in such a way (by the local image feature) that neither undershoot nor overshoot occurs, eliminating the need for post-processing for undershoot/overshoot removal.Type: GrantFiled: April 30, 2007Date of Patent: October 5, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Peng Lin, Yeong-Taeg Kim
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Patent number: 7616829Abstract: A post-processing manager provides reconstructed block based picture post-processing that is uncoupled from picture decoding by dividing a reconstructed image that was encoded using block based processing into non-overlapping blocks, creating a DC image by computing the DC value of each block, creating a zero mean image by subtracting the DC value of each block from the corresponding pixels of that block, filtering the DC image and adding the filtered DC image to the zero mean image. A weak filtering operation can be applied to reduce blocking artifacts, and a strong filtering operation can be applied to smooth luminance transitions.Type: GrantFiled: October 29, 2003Date of Patent: November 10, 2009Assignee: Apple Inc.Inventors: Brett Bilbrey, Alexei V. Ouzilevski
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Patent number: 7593598Abstract: A method of designing filters for filtering digitized images includes constructing a set of difference-of-Gaussian (DoG) filters that partition a frequency space, forming a linear combination of said DoG filters to form a trial filter, convolving said trial filter with a training image to obtain a trial image, summing a square difference of said trial image and a target image, wherein if said sum is a minimum, outputting said trial filter as a final filter, and using a singular value decomposition on said final filter wherein an eigenvector corresponding to the largest eigenvalue of the final filter is obtained.Type: GrantFiled: January 31, 2006Date of Patent: September 22, 2009Assignee: Siemens Medical Solutions USA, Inc.Inventors: Ti-chiun Chang, Jason Jenn-Kwei Tyan
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Patent number: 7567724Abstract: The present invention is applied, for example, to resolution conversion. An edge gradient direction v1 with the largest gradient of pixel values and an edge direction v2 orthogonal to the edge gradient direction v1 are detected. Edge enhancement and smoothing processing are performed in the edge gradient direction v1 and in the edge direction v2, respectively, to generate output image data D2.Type: GrantFiled: April 21, 2005Date of Patent: July 28, 2009Assignee: Sony CorporationInventors: Shinichiro Gomi, Masami Ogata, Kazuhiko Ueda
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Patent number: 7551232Abstract: A method for filtering digital video is disclosed. The method generally includes the steps of (A) checking a plurality of original blocks in an original field for a plurality of artifacts, wherein detection of the artifacts is based on an adjustable threshold, (B) first filtering each of the original blocks having at least one of the artifacts to remove the at least one artifact and (C) second filtering each of the original blocks lacking at least one of the artifacts to remove noise, wherein the second filtering is (i) motion compensated and (ii) adaptive to a respective noise level in each of the original blocks.Type: GrantFiled: November 14, 2005Date of Patent: June 23, 2009Assignee: LSI CorporationInventors: Lowell L. Winger, Pavel Novotny, Yunwei Jia
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Patent number: 7440598Abstract: 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 width, and the filtered projection data are mixed with the acquired projection data with a fixing of the respective quantitative relationships of filtered projection data to acquired projection data ensuing dependent on respective subsets of the acquired projection data.Type: GrantFiled: September 5, 2002Date of Patent: October 21, 2008Assignee: Siemens AktiengesellschaftInventors: Herbert Bruder, Thomas Flohr, Otto Sembritzki, Karl Stierstorfer
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Patent number: 7405770Abstract: 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 reduces noise and distortion artifacts in the sampled video information. The gains of each of the equalizer bands is adjusted dynamically by control outputs provided by a noise and distortion detector. The noise and distortion detector incorporates circuits for comparing the luminance of each plane on a per-pixel basis with neighboring pixels and also includes a pattern matching comparator that detects edge features by comparing each pixel and its neighbors with a set of predetermined patterns. The noise and distortion detection can be further confirmed by comparing the detection results across multiple frames and the equalizer gain values may be further selected by a result of a video motion type classification.Type: GrantFiled: April 27, 2005Date of Patent: July 29, 2008Assignee: Cirrus Logic, Inc.Inventor: Daniel Gudmunson
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Patent number: 7394492Abstract: 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 supplied to a signal output line to change a potential of the signal output line at transfer operation that a signal charge accumulated in a photo diode is transferred to a gate of an amplification transistor. Then, a potential of an FD portion which is capacitively coupled to the signal output line and used for supplying the signal charge to the gate of the amplification transistor increases, so that the saturation charge amount can be set to a large value.Type: GrantFiled: November 19, 2004Date of Patent: July 1, 2008Assignee: Canon Kabushiki KaishaInventor: Mahito Shinohara
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Patent number: 7271851Abstract: 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 regions of the image can be treated differently. Further, a correction signal is controlled in such a way (by the local image feature) that neither undershoot nor overshoot occurs, eliminating the need for post-processing for undershoot/overshoot removal.Type: GrantFiled: January 16, 2003Date of Patent: September 18, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Peng Lin, Yeong-Taeg Kim
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Patent number: 7185242Abstract: 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 through an antenna into a strong signal and a weak signal based on a predetermined level. The tuner unit amplifies the weak signal, bypasses the strong signal, demodulates each signal and outputs a digital stream. The control unit receives the digital stream and determines whether an error is generated, and if the error is generated, outputs a conversion signal to reverse a working state of the tuner unit. The digital signal process unit receives the digital stream and converts it to a signal type that can be outputted if the error is not generated. Accordingly, breaking or freezing of a video on the digital display apparatus can be compensated.Type: GrantFiled: May 5, 2004Date of Patent: February 27, 2007Assignee: Samsung Electronics Co., Ltd.Inventor: Kwung-pil Chun
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Patent number: 6944579Abstract: 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, there is provided a signal processing apparatus that separates and outputs an original signal from the observed signal x(t), in which multiple multidimensional signals are mixed, wherein the nonlinear function 21 is operated on an input observed signal x(t) and an estimated separation matrix W(t?1) estimated at a previous cycle. Then, an error signal e(t) is calculated 22 based on y(t) formed by this nonlinear function 21, the estimated separation matrix W(t?1) estimated at the previous cycle, and the observed signal x(t) at that time.Type: GrantFiled: October 29, 2001Date of Patent: September 13, 2005Assignee: International Business Machines CorporationInventor: Junya Shimizu
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Patent number: 6823086Abstract: 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 to the image parameters, for filtering the image sequence. The image analyzer manipulates the filter kernel as a function of the image parameters so that the system produces a filtered image, adaptable in real time, as a function of the unfiltered image, external rules, predetermined constraints, or combinations thereof. The spatial filter includes a time-invariant section and an adaptable section. The time-invariant section preferably applies a plurality of filters to the image, each of the filters having a distinct frequency response, so as to produce a plurality of distinct filtered outputs.Type: GrantFiled: August 29, 2000Date of Patent: November 23, 2004Assignee: Analogic CorporationInventor: Enrico Dolazza
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Patent number: 6795588Abstract: 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 detected, thereby properly correcting the image signal without reducing the texture specific to the image signal also in a portion continuously exhibiting fine details.Type: GrantFiled: July 28, 2000Date of Patent: September 21, 2004Assignee: Matsushita Electrical Industrial Co., Ltd.Inventors: Yutaka Nio, Katsumi Terai, Naoji Okumura, Kazuto Tanaka
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Patent number: 6747697Abstract: 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 pixel values of a digital image that may have defects and a user-defined defect threshold. The lines of pixel values are scanned on a pixel-by-pixel basis using a kernel of n×n pixels, where the kernel contains the candidate pixel being examined (120). Each kernel is numerically reordered (130) and a median value is calculated (140). A defect threshold value is calculated by multiplying the user-defined defect threshold criteria and the candidate pixel value (150). A reference value is calculated by subtracting the candidate pixel value and the median value (160). The reference value is compared to the defect threshold value (170).Type: GrantFiled: July 12, 2000Date of Patent: June 8, 2004Assignee: Koninklijke Philips Electronics, N.V.Inventors: Zhongmin Steve Lin, David Nicolay, Hung Yuet Wong
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Publication number: 20030122967Abstract: In a picture processing apparatus for receiving an input picture signal and generating an output picture signal with higher quality than the input picture signal. A first signal processing means and a second signal processing means are disposed. The first signal processing means performs a storage type process. The first signal processing means has a storing means for storing a picture signal with the same quality as the output picture signal. The first signal processing means adds the input picture signal and the picture signal stored in the storing means so as to generate a first picture signal with higher quality than the input picture and store the first picture signal to the storing means. The second signal processing means performs a class categorizing adaptive process.Type: ApplicationFiled: November 18, 2002Publication date: July 3, 2003Inventors: Tetsujiro Kondo, Hisakazu Shiraki, Yasunobu Node, Katsuhisa Shinmei
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Publication number: 20020105599Abstract: A VSB demodulating device and method in a DTV receiver is disclosed, in which a VSB signal is received for independent carrier wave recovery and symbol clock recovery. An A/D converter samples the output of a SAW filter with a fixed frequency and converts the resultant value to a digital signal. A carrier wave recovery portion recovers a carrier wave from a base band pilot signal output from a multiplier, and a timing recovery portion recovers a symbol clock used for a transmitter using the output of a matched filter disposed in a base band. In this case, the carrier wave recovery portion and the timing recovery portion are independently operated without affecting each other. Thus, the carrier wave recovery portion is operated stably even in case where a fatal ghost exists in a band used for timing recovery.Type: ApplicationFiled: February 7, 2002Publication date: August 8, 2002Inventors: Sung Ryong Hong, Joon Tae Kim
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Patent number: 6400415Abstract: 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. In one aspect of the invention, the system and method uses a frequency response and phase corrector circuit to modify the amplitude versus frequency of the signal independent of phase.Type: GrantFiled: March 23, 1998Date of Patent: June 4, 2002Assignee: Harris CorporationInventor: David Danielsons
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Publication number: 20010023413Abstract: An eyeglass synthesizing system which a customer can try wearing the eyeglass frame at his/her home is provided. A home page which an optician 7 prepares is accessed through Internet using a web browser of a personal computer, and an eyeglass frame 14 provided at the home page is selected and the selected eyeglass frame 14 is synthesized with a facial picture 15. Accordingly, the synthesized picture is displayed on the monitor screen 2A.Type: ApplicationFiled: March 19, 2001Publication date: September 20, 2001Inventors: Yasufumi Fukuma, Takeyuki Kato, Narumi Machida
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Patent number: 6052158Abstract: 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 applied to a multiplexer at the input of the equalizer, which is operated at twice the symbol rate. The outputs of the multipliers in the equalizer are combined and applied to a demultiplexer. The filtered and non-filtered equalized signals are compared and a selection as to which of the filtered or non-filtered received signals is to be processed is made based upon the comparison.Type: GrantFiled: April 24, 1998Date of Patent: April 18, 2000Assignee: Zenith Electronics CorporationInventor: Larry E. Nielsen
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Patent number: 5933198Abstract: 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 sequence of individual pixels applied to the comb filter arrangement. The output signals of the delay circuit and the first matching circuit are superposed by a superposition stage (4) supplying a filtered picture signal from its output. The matching circuit (1) is implemented in such a way that it gives the picture signal applied thereto substantially the same amplitude variations as the delay circuit (3), and that the difference between the delay of the output signals from the delay circuit (3) and the matching circuit (1) corresponds to a nominal value.Type: GrantFiled: February 10, 1997Date of Patent: August 3, 1999Assignee: U.S. Philips CorporationInventors: Sonke Struck, Ole Steinfatt
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Patent number: 5847772Abstract: 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 used to generate a second interpolated pixel from a group of pixels in an odd field of the video sequence. The use of the even-tap filter for the group of pixels in the odd field ensures that the interpolated pixels generated for both the odd and even fields are located at substantially the same vertical location. This significantly reduces an undesirable vertical signal component which would otherwise be generated when the first and second interpolated pixels are subtracted as part of a field comparison operation. The resulting improvement in field comparison accuracy provides advantages in a variety of video preprocessing applications such as deinterlacing, inverse telecine processing, adaptive field/frame filtering and PAL video framing.Type: GrantFiled: September 11, 1996Date of Patent: December 8, 1998Inventor: Aaron Wells
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Patent number: 5386244Abstract: 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 extracting filter, a switching circuit, and an image correlation judging circuit. The image correlation judging circuit makes the switching circuit select: the color signal extracted by the horizontal color signal extracting filter when the horizontal correlation is judged to be stronger than the sampling value at the target sampling point; the color signal extracted by the vertical color signal extracting filter when the vertical correlation is judged to be stronger than the same; and the color signal extracted by the horizontal/vertical color signal extracting filter when neither of them is judged to be stronger than the same.Type: GrantFiled: February 3, 1994Date of Patent: January 31, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Toshihiro Gai