Ghost Elimination (e.g., Multipath) Patents (Class 348/614)
  • Patent number: 10291455
    Abstract: The generation of OFDM signals for DOCSIS 3.1 specification having a required number of subcarriers and subcarrier spacing can be based on a sampling rate that is modified from that defined by the DOCSIS 3.1 specification. In embodiments, the base sampling rate is defined as Fs=204.8*A MHz (A>1), with a respective increase of basic IFFT size by factor A. In embodiments, the OFDM signal is sampled at a sampling rate of 204.8 MHz*A for an IFFT size of 8192*A (4096*A), where A>1.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: May 14, 2019
    Assignee: ARRIS Enterprises LLC
    Inventor: Oleksandr Volkov
  • Patent number: 9980014
    Abstract: An information providing system, reception apparatus, and methods thereof are provided for protected content data. The method for providing the protected content data includes generating or receiving the protected content data, and generating a digital television broadcast signal including at least one data field sync segment and the protected content data. The digital television broadcast signal is provided to a reception apparatus. The at least one data field sync segment carries information necessary to identify a framing structure of the digital television broadcast signal and includes one of security information for accessing the protected content data and a location of the security information.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: May 22, 2018
    Assignee: SATURN LICENSING LLC
    Inventors: Luke Fay, Brant Candelore, Frederick J. Zustak, Peter Shintani
  • Patent number: 9967114
    Abstract: A method and a transmitter for transmitting a pay load sequence are provided. The transmitter includes a ternary sequence mapper configured to map a binary data sequence to a ternary sequence stored in the transmitter, and a pulse shaping filter configured to generate a first signal based on the mapped ternary sequence. The ternary sequence includes elements of ?1, 0, and 1.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: May 8, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chang Soon Park, Young Jun Hong, Sujit Jos, Young Soo Kim, Chandrashekhar Thejaswi Ps, Kiran Bynam, Manoj Choudhary
  • Patent number: 9866883
    Abstract: Systems and methods of the present disclosure provide for dynamic delay equalization of related media signals in a media transport system. Methods include receiving a plurality of related media signals, transporting the related media signals along different media paths, calculating uncorrected propagation delays for the media paths, and delaying each of the related media signals by an amount related to the difference between the longest propagation delay (of the uncorrected propagation delays) and the uncorrected propagation delay of the related media signal/media path. Calculating the uncorrected propagation delays and delaying the related media signals may be performed in response to a change to the propagation delay of at least one of the related media signals/media paths. Additionally or alternatively, calculating the uncorrected propagation delays and delaying the related media signals may be performed while transporting the related media signals.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: January 9, 2018
    Assignee: Biamp Systems Corporation
    Inventors: Eugene Gurfinkel, Michael K. Davis, Charles H. Van Dusen
  • Patent number: 9838737
    Abstract: Implementations disclose filtering wind noises in video content. A method includes receiving video content comprising an audio component and a video component, detecting, by a processing device, occurrence of a wind noise artifact in a segment of the audio component, identifying duration of the wind noise artifact and intensity of the wind noise artifact, selecting, by the processing device, a wind noise replacement operation based on the identified duration and intensity of the wind noise artifact, and applying, by the processing device, the selected wind noise replacement operation to the segment of the audio component to remove the wind noise artifact from the segment.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: December 5, 2017
    Assignee: Google Inc.
    Inventors: Elad Eban, Aren Jansen, Sourish Chaudhuri
  • Patent number: 9818178
    Abstract: A method and system for ghost detection in an image are described. Initially, a mode for detecting ghosting artifact is determined for deciding whether to perform analog or inter field ghosting analysis on the image. Based on the determined mode, a plurality of fields is determined to generate a field overlay image. The image is updated based on the field overlay image and an inter-field average of absolute difference is computed. A significant edge image, a principal edge image, and a delta gradient image are generated. A confidence score indicative of a likelihood of ghosting artifact in the image, is computed based on at least the inter-field average of absolute difference, a first and a second count of pixels in the delta gradient image, a third count of pixels in the principal edge image, and a count of rows of the significant edge image that correspond to the ghosting artifact.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: November 14, 2017
    Assignee: Interra Systems, Inc.
    Inventors: Advait Madhav Mogre, Bhupender Kumar, Pervez Alam, Rishi Gupta, Shekhar Madnani
  • Patent number: 9659514
    Abstract: Disclosed herein is a display device for determining whether or not ghost exists in a unit of a block to perform ghost cancellation, and a control method of the display device. According to an embodiment, the display device includes: a screen configured to display an image; a calculator configured to partition the screen into a plurality of blocks and determine whether or not ghost exists in at least one block of the blocks; and a controller configured to cancel ghost existing in the at least one block in response to the calculator determining that the ghost exists in the at least one block of the blocks.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: May 23, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Ki Soo Jang
  • Patent number: 9532154
    Abstract: A method and apparatus for customizing audio signal processing for a user by a mobile device is provided. The method includes identifying hearing characteristics of the user by testing hearing abilities of the user, by the mobile device, at a plurality of frequencies; adjusting a dynamic range of each of the plurality of frequencies based on the hearing characteristics; processing a decoded audio signal based on the adjusted dynamic range of each of the plurality of frequencies; and outputting the processed audio signal.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: December 27, 2016
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Kyoungho Bang, Yangsu Kim, Kyungseok Oh, Juntai Kim, Gunhyuk Yoon, Chulmin Choi
  • Patent number: 9515814
    Abstract: A circuit for performing clock recovery according to a received digital signal 30. The circuit includes at least an edge sampler 105 and a data sampler 145 for sampling the digital signal, and a clock signal supply circuit. The clock signal supply circuit provides edge clock 25 and data clock 20 signals offset in phase from one another to the respective clock inputs of the edge sampler 105 and the data sampler 145. The clock signal supply circuit is operable to selectively vary a phase offset between the edge and data clock signals.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: December 6, 2016
    Assignee: RAMBUS INC.
    Inventors: Hae-Chang Lee, Jared L. Zerbe, Carl William Werner
  • Patent number: 9515687
    Abstract: Apparatus and methods are described to perform inter carrier interference (ICI) reduction or cancellation in an orthogonal frequency domain multiplexing (OFDM) receiver. A first and a second stage of ICI cancellation may be performed before inputting an estimated transmitted data carrier for forward error correction. Forward error correction may include a signal re-correction and reconstruction of the estimated transmitted data carrier prior to a further stage of ICI cancellation.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: December 6, 2016
    Assignee: Intel Corporation
    Inventors: Thushara Hewavithana, Parveen K. Shukla, Bernard Arambepola
  • Patent number: 9491399
    Abstract: Disclosed are a video signal attenuation equalization circuit, a video signal processing apparatus, and a control device and method, which are used for solving the problem that the transmission of an analog video signal is distorted after the analog video signal is transmitted by a coaxial cable, so as to guarantee low signal distortion after the video signal is transmitted at a long distance.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: November 8, 2016
    Assignee: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Jun Yin, Zhicheng Ye, Zhuqiang Bao, Yun Xie, Xingming Zhang, Liquan Fu, Jiangming Zhu, Jun Wu, Jian Wu
  • Patent number: 9385766
    Abstract: A Fourier transform unit (111) performs Fourier transform on a digital signal on a time axis to generate a frequency domain signal which is a signal on a frequency axis. A filter unit (113) equalizes the frequency domain signal in a frequency domain using N first coefficients. An inverse Fourier transform unit (112) performs inverse Fourier transform on the frequency domain signal processed by the filter unit (113) and returns the frequency domain signal to the digital signal on the time axis. That is, the Fourier transform unit (111), the inverse Fourier transform unit (112), and the filter unit (113) compensate for waveform distortion included in the digital signal using an equalization process (that is, frequency-domain equalization (FDE)) in the frequency domain. A first coefficient setting unit (114) sets N first coefficients used by the filter unit (113) using m (provided N>m) second coefficients.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: July 5, 2016
    Assignee: NEC CORPORATION
    Inventor: Junichi Abe
  • Patent number: 9369321
    Abstract: An apparatus is configured to receive and demodulate a homodyne carrier signal, where the homodyne carrier signal comprises sensor data of at least two sensors. A method includes receiving sensed signals from at least two sensors; and modulating the sensed signals on a single homodyne carrier signal. A demodulator is configured to receive and demodulate a homodyne carrier signal carrying sensor data of at least two sensors.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: June 14, 2016
    Assignee: Northrop Grumman Systems Corporation
    Inventor: Ronald Scrofano
  • Patent number: 9343074
    Abstract: An apparatus for generating an audio output signal based on an encoded audio signal spectrum has a processing unit, a pseudo coefficients determiner, a spectrum modification unit, a spectrum-time conversion unit, a controllable oscillator and a mixer. The pseudo coefficients determiner is configured to determine pseudo coefficients of the decoded audio signal spectrum. The spectrum modification unit is configured to set the pseudo coefficients to a predefined value to acquire a modified audio signal spectrum. The spectrum-time conversion unit is configured to convert the modified audio signal spectrum to a time-domain. The controllable oscillator is configured to generate a time-domain oscillator signal and is controlled by the spectral location and the spectral value of at least one of the pseudo coefficients. The mixer is configured to mix the time-domain conversion signal and the time-domain oscillator signal.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: May 17, 2016
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Sascha Disch, Benjamin Schubert, Ralf Geiger, Martin Dietz
  • Patent number: 9252987
    Abstract: A communication device includes a transmission equalizer that equalizes a transmission signal transmitted in a signal transmission performed via a non-contact coupling, the transmission equalizer creates a plurality of equivalent transmission signals by branching the transmission signal. The transmission equalizer includes a plurality of signal paths that respectively provide time delays different from each other to the equivalent transmission signals, and an output path that provides a filter output based on the total sum of outputs of the signal paths to the non-contact coupling, and at least one of the plurality of signal paths includes a variable delay circuit that can change a time delay to be given to the corresponding transmission signal.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: February 2, 2016
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Masaharu Matsudaira, Koichi Yamaguchi, Kenichiro Hijioka
  • Patent number: 9210012
    Abstract: Frequency domain based methods and systems to perform adaptive multi-mode pre-decoding linear equalization, adaptive channel estimation, turbo equalization, turbo equalization iteration control, and noise variance estimation. An adaptive linear pre-decoder equalizer may include a multi-mode equalizer, which may include a blind equalizer to determine initial equalization coefficients and a decision-directed equalizer to refine the initial equalization coefficients. Turbo equalization may include a dynamic iteration termination criterion and/or a fixed termination criterion. Turbo equalization may be based in part on an adaptive estimated noise variance. Methods and systems disclosed herein may be implemented with respect to single-carrier signals such as digital video broadcast signals.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: December 8, 2015
    Assignee: Intel Corporation
    Inventors: Evgeny Pustovalov, Andrey Turlikov
  • Patent number: 9208365
    Abstract: A distance between at least one antenna of an interrogation system and a transponder, such as an RFID tag, is determined based on derivatives with respect to frequency of the phase and the signal strength of responses transmitted by the transponder and received at the at least one antenna. The derivatives of the phase and the signal strength facilitate compensating for sources of multipath interference. Determining changes in distance may further facilitate determining location, speed, or bearing of the transponder by the interrogation system.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: December 8, 2015
    Assignee: INTERMEC IP CORP.
    Inventor: Pavel Nikitin
  • Patent number: 9197459
    Abstract: In a decision feedback equalizer, at least one of weighting devices that has a tap coefficient an absolute value of which is relatively larger than absolute values of tap coefficients of other weighting devices is referred to as a main weighting device, and delay elements are disposed asymmetrically on signal processing paths or updating paths of the tap coefficients of the weighting devices in such a manner that an updating interval of the tap coefficient of the main weighting device is shorter than updating intervals of the tap coefficients of the other weighting devices.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: November 24, 2015
    Assignee: DENSO CORPORATION
    Inventors: Tetsuya Kusumoto, Shigeki Ohtsuka, Nobuaki Matsudaira, Hironobu Akita
  • Patent number: 9178737
    Abstract: An OFDM signal generator includes a time domain data signal generator configured to generate a time domain data signal, a partial signal generator configured to generate a plurality of partial signals based on a tail section of the time domain data signal, and a circuit element configured to form a difference between or a sum of the time domain data signal and the plurality of partial signals.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: November 3, 2015
    Assignee: Intel Deutschland GmbH
    Inventor: Stefan Fechtel
  • Patent number: 9154795
    Abstract: There are provided methods and apparatus for estimating channel induced distortion. A method for estimating distortion for an inter-coded image includes the step of calculating an average channel distortion for received inter-coded macroblocks in the inter-coded image as a previous average channel distortion multiplied by a scaling factor.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: October 6, 2015
    Assignee: THOMSON LICENSING
    Inventors: Yao Wang, Boyce Jill MacDonald, Zhenyu Wu
  • Patent number: 9077568
    Abstract: A receiving apparatus applied to a receiving end of a communication device having an equalizer is provided. The receiving apparatus includes a filter and a channel estimator. The filter filters a received signal to reduce a multipath effect of the received signal and outputs a filtered signal. The channel estimator performs channel estimation on the received signal to generate an estimation result. The estimation result is for determining which of the received signal and the filtered signal is to be selected and sent to the equalizer.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: July 7, 2015
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Chih-Cheng Kuo, Ko-Yin Lai, Tai-Lai Tung, Wen-Chieh Yang
  • Patent number: 8922719
    Abstract: Circuit for processing an input signal based on at least one reference signal, comprising a phase locked loop demodulator configured to receive a speed control signal and said input signal and further configured to follow a frequency and/or a phase of said input signal at a speed, wherein said speed depends on said speed control signal; and a reference signal detector configured to determine said at least one reference signal and to set said speed by outputting said speed control signal to said phase locked loop demodulator, wherein, if said reference signal detector detects said at least one reference signal, said reference signal detector decreases said speed.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: December 30, 2014
    Assignee: Sony Deutschland GmbH
    Inventors: Gerd Spalink, Ben Eitel
  • Patent number: 8878904
    Abstract: A system, method, and computer program product are provided for enhancing a viewing experience when display content is viewed utilizing stereo glasses. In use, display content is received for being outputted utilizing a display. Further, a duration of a vertical blanking interval associated with the display content is increased for enhancing a viewing experience when the display content is viewed utilizing the stereo glasses.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: November 4, 2014
    Assignee: NVIDIA Corporation
    Inventors: Gerrit A. Slavenburg, Thomas F. Fox, David Robert Cook
  • Patent number: 8804044
    Abstract: An apparatus to provide a fall-back procedure for a PRC imaging device is described. The apparatus includes a PRC controller, a system resource monitor, and a PRC setting calculator. The PRC controller outputs a stream of images at an adjustable temporal rate. The adjustable temporal rate is constrained within a range defined by a first predetermined rate and a second predetermined rate. The system resource monitor obtains a measurement of system resource utilization. The PRC setting calculator determines a setting for the PRC controller in response to the measurement of system resource utilization. Additionally, the PRC controller determines a value for the adjustable temporal rate in response to the setting.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: August 12, 2014
    Assignee: Entropic Communications, Inc.
    Inventors: Erwin Bellers, Johan G. W. M. Janssen
  • Patent number: 8797462
    Abstract: 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: Grant
    Filed: February 10, 2011
    Date of Patent: August 5, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Shinya Hirai
  • Patent number: 8649429
    Abstract: Digital television broadcasting signals employ parallel concatenated convolutional coding, commonly called “turbo coding”, to improve reception by receivers in motor vehicles. Turbo coded Reed-Solomon codewords are transversally disposed in the payload fields of encapsulating MPEG-2-compliant packets to improve the capability of the Reed-Solomon coding to overcome deep fades. Turbo codewords are transmitted more than once in so-called “staggercasting”. Reception of DTV signals is improved by combining soft decisions concerning repeated transmissions of turbo codewords before turbo decoding. Only the data components of turbo codewords are transmitted twice in “punctured” staggercasting of turbo codewords, with parity components being transmitted only once, so code rate is reduced by a smaller factor than two.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: February 11, 2014
    Inventor: Allen LeRoy Limberg
  • Patent number: 8599955
    Abstract: A system for distinguishing between any one of a plurality of antennas in a multiple-input-multiple-output (MIMO) system having an augmented number of antennas is provided herein. The system includes a MIMO receiving system having N branches and configured to operate in accordance with a channel estimation MIMO receiving scheme; a radio distribution network (RDN) connected to the MIMO receiving system, the RDN comprising at least one beamformer, being fed by two or more antennas, so that a total number of antennas in the system is M, wherein M is greater than N, wherein each one of the beamformers include a combiner configured to combine signals coming from the antennas into a single signal; and at least one antenna distinguishing circuitry, each associated with a respective beamformer, wherein the antenna distinguishing circuitry is configured to distinguish between the signals coming from the antennas which feed the respective beamformer.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: December 3, 2013
    Assignee: Magnolia Broadband Inc.
    Inventors: Kenneth Kludt, Haim Harel, Eduardo Abreu
  • Patent number: 8576341
    Abstract: In one embodiment of the present invention, motion compensated interpolation is performed by locating full frame conceal and reveal areas, determining intermediate frame occlusion areas of an interpolated frame of the displayable output by locating intermediate frame conceal areas based on projected locations of pixels within the full frame conceal areas using forward motion vectors and information about a time slot for the interpolated frame, and by locating intermediate frame reveal areas based on projected locations of pixels within the full frame reveal areas using backward motion vectors and information about the time slot for the interpolated frame; for any pixels in the interpolated frame to which there is neither a forward vector nor a backward vector projecting: including the pixel in an intermediate frame conceal area if it is not located within the full frame reveal area; including the pixel in an intermediate frame reveal area if it is not located within the full frame conceal area; and using the
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: November 5, 2013
    Assignee: STMicroelectronics, Inc.
    Inventor: Gordon Petrides
  • Patent number: 8564724
    Abstract: A method of noise filtering of a digital video sequence to reduce ghosting artifacts, the method including computing motion values for pixels in a frame of the digital video sequence based on a reference frame, computing blending factors for the pixels based on the motion values, generating filtered output pixel values by applying the blending factors to corresponding pixel values in the reference frame and the frame, wherein selected filtered output pixel values are converged toward corresponding pixel values in the frame to reduce ghosting artifacts, and outputting the filtered frame.
    Type: Grant
    Filed: April 4, 2010
    Date of Patent: October 22, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Wei Hong, Harmeet Singh
  • Patent number: 8542322
    Abstract: In one embodiment of the present invention, motion compensated interpolation is performed by locating full frame conceal and reveal areas, determining intermediate frame occlusion areas of an interpolated frame of the displayable output by locating intermediate frame conceal areas based on projected locations of pixels within the full frame conceal areas using primary forward motion vectors and information about a time slot for the interpolated frame, and by locating intermediate frame reveal areas based on projected locations of pixels within the full frame reveal areas using primary backward motion vectors and information about the time slot for the interpolated frame. The intermediate frame conceal areas are then modified by projecting locations of pixels using secondary forward motion vectors and the intermediate frame reveal areas are modified by projecting locations of pixels using secondary backward motion vectors.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: September 24, 2013
    Assignee: STMicroelectronics, Inc.
    Inventor: Gordon Petrides
  • Patent number: 8526508
    Abstract: A method of processing broadcast data in a transmitting system includes randomizing enhanced data; Reed-Solomon (RS) encoding and Cyclic Redundancy Check encoding the randomized enhanced data to build an RS frame; encoding the enhanced data in the built RS frame at a coding rate of at least ½ or ¼; first interleaving the encoded enhanced data; deinterleaving the first interleaved enhanced data; first multiplexing enhanced data packets including the deinterleaved enhanced data with main data packets including main data; randomizing the main data in the multiplexed enhanced and main data packets; second interleaving the enhanced data in the multiplexed enhanced and main data packets and the randomized main data to output a data group having the interleaved enhanced data and the interleaved main data; trellis encoding data in the data group in a trellis encoding unit; and second multiplexing the trellis-encoded data with field synchronization data and segment synchronization data.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: September 3, 2013
    Assignee: LG Electronics Inc.
    Inventors: Byoung Gill Kim, In Hwan Choi, Kyung Won Kang, Kook Yeon Kwak, Woo Chan Kim
  • Patent number: 8488064
    Abstract: A DTV receiver includes a tuner, an information detector, a demodulator, and a channel equalizer. The tuner receives a broadcast signal including valid data in which a known data sequence is periodically repeated. The information detector detects location information of the known data sequence and a coarse frequency offset value of the broadcast signal. The demodulator demodulates the broadcast signal by estimating a fine frequency offset value using the detected location information and by compensating a frequency offset of the broadcast signal using the course and fine frequency offset values. Finally, the channel equalizer compensates channel distortion of the demodulated signal using the detected location information.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: July 16, 2013
    Assignee: LG Electronics Inc.
    Inventors: Jong Moon Kim, In Hwan Choi
  • Patent number: 8432497
    Abstract: A method of processing broadcast data includes performing RS (Reed-Solomon) encoding and CRC (Cyclic Redundancy Check) encoding on mobile service data to output an RS frame; dividing the RS frame into a plurality of portions; block processing data in one portion of the plurality of portions; mapping the block processed data in the one portion into at least one region of a data group that comprises a plurality of regions, and adding a first known data sequence, a plurality of second known data sequences, and a transmission parameter to the data group; and transmitting a transmission frame including the data group, wherein the transmission parameter is positioned between the first known data sequence and one of the plurality of second known data sequences, and the first known data sequence and the one of the plurality of second known data sequences differ from each other in length.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: April 30, 2013
    Assignee: LG Electronics Inc.
    Inventors: Hyoung Gon Lee, In Hwan Choi, Kook Yeon Kwak, Jong Moon Kim, Won Gyu Song, Byoung Gill Kim, Jin Woo Kim
  • Patent number: 8416269
    Abstract: An LCD device and an LCD driving method select one among a plurality of threshold values provided along gray level regions of the pixel data as a threshold value for pixel data in a current frame interval. Accordingly, the number of times over-driving occurs due to noise when a still image is displayed can be minimized.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: April 9, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Hee Seung Choi, Yun Sung Yang
  • Patent number: 8396206
    Abstract: Embodiments of a multi-channel audio communication device and methods for reducing echoes are generally described herein. Other embodiments may be described and claimed. In some embodiments, echo-reduction circuitry may insert training signals into digital audio signals at or below a noise floor and in a non-audible portion of the frequency spectrum based on a spectral mask. Training signals may be generated from spectrum estimates and training sequences. An adaptive filter may generate echo-cancellation signals using filter coefficients generated fawn the training sequences and return-path signals. The echo cancellation signals may remove echo signals from the return-path signals.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: March 12, 2013
    Assignee: Infineon Technologies AG
    Inventors: Simon Jäermyr, Mikael Hjelm
  • Patent number: 8358334
    Abstract: Provided are an apparatus, a method, and a program for processing an image which reduces crosstalk and achieves high image quality. The method includes obtaining a differential signal by subtracting one input image signal of an object to be processed from another input image signal; applying a predetermined correction coefficient to the differential signal; determining, for each pixel, whether the differential signal is a negative value; selectively outputting, for each pixel, the differential signal, to which the predetermined correction coefficient is applied, as a correction signal based on a result of the determining; and correcting, for each pixel, the one input image signal based on the one input image signal and the correction signal that is selectively output if the differential signal is the negative value.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: January 22, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Junta Asano, Masahiko Yoshiyama, Takashi Nakano, Yoshiaki Okuno
  • Patent number: 8355451
    Abstract: A method of processing a digital broadcast signal includes Reed-Solomon (RS) encoding enhanced service data for each column of at least one RS frame payload and adding a Cyclic Redundancy Check (CRC) checksum byte at a right end of each row of the at least one RS frame payload to build at least one RS frame and forming data groups including the enhanced service data in the built RS frame and a plurality of known data sequences. Forming the data groups includes mapping the RS encoded enhanced service data into each of the data groups and inserting a place holder for a non-systematic RS parity into each of the data groups. The method further includes deinterleaving data in each of the data groups including the enhanced service data and the place holder and multiplexing the enhanced service data in each of the formed data groups with main service data.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: January 15, 2013
    Assignee: LG Electronics Inc.
    Inventors: Byoung Gill Kim, In Hwan Choi, Kyung Won Kang, Kook Yeon Kwak, Woo Chan Kim
  • Patent number: 8290035
    Abstract: Digital television broadcasting signals employ parallel concatenated convolutional coding, commonly called “turbo coding”, to improve reception by receivers in motor vehicles. Turbo coded Reed-Solomon codewords are transversally disposed in the payload fields of encapsulating MPEG-2-compliant packets to improve the capability of the Reed-Solomon coding to overcome deep fades. Turbo codewords are transmitted more than once in so-called “staggercasting”. Reception of DTV signals is improved by combining soft decisions concerning repeated transmissions of turbo codewords before turbo decoding. Only the data components of turbo codewords are transmitted twice in “punctured” staggercasting of turbo codewords, with parity components being transmitted only once, so code rate is reduced by a smaller factor than two.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: October 16, 2012
    Inventor: Allen LeRoy Limberg
  • Patent number: 8213597
    Abstract: Embodiments of an audio communication device and methods for reducing echoes are generally described herein. Other embodiments may be described and claimed. In some embodiments, echo-reduction circuitry may insert a training signal into digital audio signals at or below a noise floor and in a non-audible portion of the frequency spectrum based on a spectral mask. The training signal may be generated from a spectrum estimate and a training sequence. An adaptive filter may generate an echo-cancellation signal using filter coefficients generated from the training sequence and return-path signals. The echo-cancellation signal may remove echo signals from the return-path signals.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: July 3, 2012
    Assignee: Infineon Technologies AG
    Inventor: Mikael Hjelm
  • Patent number: 8212934
    Abstract: A method for processing an analog television signal. A reference signal based on a field synchronizing signal of the analog television signal and equalizing the analog television signal based on the reference signal are determined. The reference signal is determined by calculating a difference between a first part of the field synchronizing signal and a second part of the field synchronizing signal, wherein the first and second parts are selected such that the reference signal is non-zero.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: July 3, 2012
    Assignee: Sony Corporation
    Inventor: Ben Eitel
  • Patent number: 8204137
    Abstract: A channel equalizer includes a first transformer, an estimator, an average calculator, a second transformer, a coefficient calculator, a compensator, and a third transformer. The first transformer converts normal data into frequency domain data, where a known data sequence is periodically repeated in the normal data. The estimator estimates channel impulse responses (CIR) during known data intervals adjacent to each normal data block. The average calculator calculates an average value of the CIRs. The second transformer converts the average value into frequency domain data. The coefficient calculator calculates equalization coefficients using the average value, and the compensator compensates channel distortion of each normal data block using the coefficients. The third transformer converts the compensated data block into time domain data.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: June 19, 2012
    Assignee: LG Electronics Inc.
    Inventors: Byoung Gill Kim, In Hwan Choi, Kyung Won Kang, Kook Yeon Kwak, Woo Chan Kim
  • Patent number: 8199839
    Abstract: A digital broadcast transmitting/receiving system and a signal processing method thereof that can improve the receiving performance of the system. A digital broadcast transmitter has a randomizer to randomize an input data stream which has null bytes being inserted at a specified position, a multiplexer to output a data stream formed by inserting specified known data into the position of the null bytes of the randomized data stream, an encoder to encode the data stream outputted from the multiplexer, and a modulator/RF-converter to modulate the encoded data, RF-convert the modulated data and transmit the RF-converted data. The receiving performance of the digital broadcast transmitting/receiving system can be improved even in a multi-path channel by detecting the known data from the received signal and using the known data in synchronization and equalization in a digital broadcast receiver.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: June 12, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hae-joo Jeong, Yong-deok Chang
  • Patent number: 8169467
    Abstract: A system, method, and computer program product are provided for enhancing a viewing experience when display content is viewed utilizing stereo glasses. In use, display content is received for being outputted utilizing a display. Further, a duration of a vertical blanking interval associated with the display content is increased for enhancing a viewing experience when the display content is viewed utilizing the stereo glasses.
    Type: Grant
    Filed: August 4, 2006
    Date of Patent: May 1, 2012
    Assignee: NVIDIA Corporation
    Inventors: Gerrit A. Slavenburg, Thomas F. Fox, David Robert Cook
  • Patent number: 8164691
    Abstract: A VSB reception system includes a sequence generator for decoding a symbol corresponding to the supplemental data and generating a predefined sequence included in the supplemental data at VSB transmission system. The reception system also includes a modified legacy VSB receiver for processing the data received from the VSB transmission system in a reverse order of the VSB transmission system by using the sequence, and a demultiplexer for demultiplexing the data from the modified legacy VSB receiver into the MPEG data and the supplemental data. The VSB reception system also includes a supplemental data processor for processing the supplemental data segment from the demultiplexer in a reverse order of the transmission system, to obtain the supplemental data, thereby carrying out the slicer prediction, decoding, and symbol decision more accurately by using the predefined sequence, to improve a performance.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: April 24, 2012
    Assignee: LG Electronics Inc.
    Inventors: In Hwan Choi, Young Mo Gu, Kyung Won Kang, Kook Yeon Kwak
  • Patent number: 8144258
    Abstract: A digital television (DTV) receiving system includes a tuner, a demodulator, a known data detector, an equalizer, a transmission detector, and a block decoder. The tuner receives a DTV signal having a data frame in which main and mobile service data are multiplexed. The demodulator demodulates the DTV signal, and the known data detector detects known data included in the mobile service data. The equalizer equalizes the demodulated DTV signal using the detected known data, and the transmission parameter detector detects an error correction mode from the equalized DTV signal. Finally, the block decoder decodes the equalized DTV signal for error correction using the detected error correction mode.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: March 27, 2012
    Assignee: LG Electronics Inc.
    Inventors: Hyoung Gon Lee, In Hwan Choi, Kook Yeon Kwak, Jong Moon Kim, Won Gyu Song, Byoung Gill Kim, Jin Woo Kim
  • Patent number: 8107548
    Abstract: A digital broadcast transmitting/receiving system and a signal processing method thereof that can improve the receiving performance of the system. A digital broadcast transmitter has a randomizer to randomize an input data stream which has null bytes being inserted at a specified position, a multiplexer to output a data stream formed by inserting specified known data into the position of the null bytes of the randomized data stream, an encoder to encode the data stream outputted from the multiplexer, and a modulator/RF-converter to modulate the encoded data, RF-convert the modulated data and transmit the RF-converted data. The receiving performance of the digital broadcast transmitting/receiving system can be improved even in a multi-path channel by detecting the known data from the received signal and using the known data in synchronization and equalization in a digital broadcast receiver.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: January 31, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hae-joo Jeong, Yong-deok Chang
  • Patent number: 8063920
    Abstract: This invention relates to a method, a computer program, a computer program product and a device for reducing motion blur of images shown on non-stroboscopic display devices, in which local areas p, of an image of a video signal are displayed during respective local display times t; that are less than or equal to a image period T, comprising determining (40) an amount X; of high spatial frequency content related to a local area p, of said image of said video signal, and adjusting (41) a local display time t, in dependence on said determined amount X; of high spatial frequency content, wherein said local display time t; is decreased with increasing determined amount X; of high spatial frequency content.
    Type: Grant
    Filed: October 10, 2005
    Date of Patent: November 22, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Gerard De Haan, Leo Jan Velthoven, Michiel Adriaanszoon Klompenhouwer
  • Patent number: 8054891
    Abstract: A channel equalizer includes a first transformer, an estimator, an average calculator, a second transformer, a coefficient calculator, a compensator, and a third transformer. The first transformer converts normal data into frequency domain data, where a known data sequence is periodically repeated in the normal data. The estimator estimates channel impulse responses (CIR) during known data intervals adjacent to each normal data block. The average calculator calculates an average value of the CIRs. The second transformer converts the average value into frequency domain data. The coefficient calculator calculates equalization coefficients using the average value, and the compensator compensates channel distortion of each normal data block using the coefficients. The third transformer converts the compensated data block into time domain data.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: November 8, 2011
    Assignee: LG Electronics Inc.
    Inventors: Byoung Gill Kim, In Hwan Choi, Kyung Won Kang, Kook Yeon Kwak, Woo Chan Kim
  • Publication number: 20110242422
    Abstract: A method of noise filtering of a digital video sequence to reduce ghosting artifacts, the method including computing motion values for pixels in a frame of the digital video sequence based on a reference frame, computing blending factors for the pixels based on the motion values, generating filtered output pixel values by applying the blending factors to corresponding pixel values in the reference frame and the frame, wherein selected filtered output pixel values are converged toward corresponding pixel values in the frame to reduce ghosting artifacts, and outputting the filtered frame.
    Type: Application
    Filed: April 4, 2010
    Publication date: October 6, 2011
    Inventors: Wei Hong, Harmeet Singh
  • Patent number: 8013941
    Abstract: A DTV receiver includes a tuner, an information detector, a demodulator, and a channel equalizer. The tuner receives a broadcast signal including valid data in which a known data sequence is periodically repeated. The information detector detects location information of the known data sequence and a coarse frequency offset value of the broadcast signal. The demodulator demodulates the broadcast signal by estimating a fine frequency offset value using the detected location information and by compensating a frequency offset of the broadcast signal using the course and fine frequency offset values. Finally, the channel equalizer compensates channel distortion of the demodulated signal using the detected location information.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: September 6, 2011
    Assignee: LG Electronics, Inc.
    Inventors: Jong Moon Kim, In Hwan Choi