Patents Examined by Sudhanshu C. Pathak
  • Patent number: 8184340
    Abstract: What is disclosed is an image path that advantageously uses halftone classification to select appropriate mappings in gray-scale management and color management operations. The tags generated in the scanner help identify different classes of halftones. One is selected from several pixel-value mappings to provide proper compensation. That is, the one-dimensional and multi-dimensional pixel-value mappings within the color management module are selected based on halftone classification tags from the scanner. The tagging is either one bit that indicates “Low Frequency Halftone” and “Not LFHT”, or, more preferably, the tag is multi-bit indicating a frequency bin that contains the frequency of the input halftone. Additionally, the multi-bit tag can indicate particular halftone screen types, such as dot screens, line screens, stochastic screens or error diffusion.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: May 22, 2012
    Assignee: Xerox Corporation
    Inventors: Robert P. Loce, Martin S. Maltz, Jay S. Grzenda
  • Patent number: 8035833
    Abstract: A communication interface unit of a facsimile and a transformer for preventing a power source noise. The communication interface unit includes the transformer between a line unit and a MODEM for electrically separating the circuit boards of the line unit and the MODEM for preventing the power source noise causing data transmission error from flowing into the line unit. Also, a method for bonding the ferrite core and the housing in order to prevent damage to the transformer caused by an external force and minimizing generation of capacitance component by bonding. The bonding method can be more effectively implemented when an integrated circuit type data access arrangement circuit is used for accessing the PSTN. The present invention can prevent distortion of data generated by power source noise such as EFT and also prevent the ferrite core slipping off from the housing.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: October 11, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Eog-kyu Kim
  • Patent number: 8023164
    Abstract: Disclosed herein is a color adjustment apparatus, including: a color information storage section configured to store color information regarding an arbitrary region designated through a pointer in an editing image region; and a color coordinate explicitly displaying section configured to explicitly display a mark, which specifies color coordinates corresponding to the color information, at a pertaining position on a hue ring or a hue bar chart prepared for color adjustment.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: September 20, 2011
    Assignee: Sony Corporation
    Inventor: Kaoru Ogawa
  • Patent number: 8023134
    Abstract: Disclosed herein is a method of preparing production tickets that involves selecting order data from at least a first data field in an ordering system, feeding the selected order data to a workflow management system, and generating a production ticket for a print production job using at least a portion of the selected order data to name the print production job. One embodiment employs a join identifier to include several related files on the same production ticket. Corresponding configuration tools and workflow management systems also are disclosed.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: September 20, 2011
    Assignee: Xerox Corporation
    Inventors: Donald M. Pangrazio, III, Anthony J. Leone, III, Michael J. Evan, Connie C. He, Nisha Pan, Yolanda Palomo
  • Patent number: 8018999
    Abstract: A method for simulating an image captured at a long exposure time (“simulated image”), includes (1) capturing each of first, second, and third images at a short exposure time, (2) determining a first relative motion between the first and the second images, (3) transforming the first image to remove the first relative motion, (4) determining a second relative motion between the third and the second images, (5) transforming the third image to remove the second relative motion, and (6) combining the first, the second, and the third images to form the simulated image. Relative motions between images are determined by matching blocks at multiple resolutions to determine corresponding points between the images. Transformation to remove relative motion is determined by fitting corresponding points between the images using a minimum square error (MSE) algorithm in a random sample consensus (RANSAC) framework.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: September 13, 2011
    Assignee: ArcSoft, Inc.
    Inventors: Tianxiang Yao, Yiqing Jin, Donghui Wu
  • Patent number: 8018619
    Abstract: A server receives simulation condition input from a client computer, and in accordance with the simulation condition input creates display-use data indicating the result of the simulation, and sends the display-use data to the client. The print simulator of the server first converts the image data to ink quantities, and then converts the ink quantities to spectral reflectance of the print. Then, using the spectral reflectance of the print together with the print observation condition and the display device observation condition, there is created display-use data for simulating the appearance of the print under the print observation condition, under the display device observation condition.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: September 13, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Yuko Yamamoto, Yoshifumi Arai
  • Patent number: 7982922
    Abstract: According to the present invention, an image processing apparatus comprises scanning unit that converts a original image into image data; extraction unit that extracts an area that contains characters of every character size from the image data scanned by the scanning unit; and display unit that displays images of the area that contains characters extracted by the extraction unit at a plurality of resolutions.
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: July 19, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Junichi Takano
  • Patent number: 7893872
    Abstract: A method and apparatus for performing blind signal separation in an orthogonal frequency division multiplexing (OFDM) multiple-input multiple-output (MIMO) system are disclosed. A transmitter generates a plurality of spatial streams of data and transmits the spatial streams via a plurality of transmit antennas. A receiver receives the transmitted spatial data streams with a plurality of receive antennas and generates a plurality of receive data streams. The receiver performs a discrete Fourier transform (DFT) on each of the receive data streams to generate a plurality of frequency domain data streams. The receiver then performs a blind signal separation on the frequency domain data streams to recover spatial streams transmitted by the transmitter. The blind signal separation may be performed by using an independent component analysis (ICA) in the complex domain. The blind signal separation may be performed individually for each OFDM subcarrier.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: February 22, 2011
    Assignee: InterDigital Technology Corporation
    Inventor: Ivica Kostanic
  • Patent number: 7894547
    Abstract: In-phase (I) and quadrature-phase (Q) signals are corrected for both amplitude and phase imbalances by passing the I and Q signals successively through a first amplitude correction stage, a sum-difference stage, and a second amplitude correction stage. The first amplitude correction stage balances the signal levels of the I and Q signals. The sum-difference stage produce a sum of the input I and Q signals, and a difference of the input I and Q signals, resulting in ideal quadrature in the outputs produced. The second amplitude correction stage corrects the amplitude differences from the sum-difference stage. Circuit configurations are used that minimize errors produced by the signal processing stages.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: February 22, 2011
    Assignee: RF Magic, Inc.
    Inventors: Richard Jacques Fortier, Wing Fat Andy Lau, Peter Shah
  • Patent number: 7894543
    Abstract: Provided are an apparatus and method for canceling interference in a Broadband Wireless Access (BWA) system. The method includes estimating channel coefficient vectors of a plurality of Mobile Stations (MSs) using the same resource; computing a correlation matrix by subtracting a channel coefficient vector of a corresponding MS from a specific tone input vector within the same resource and by auto-correlating the subtracted vector; canceling interference from the data-tone input vector and the channel matrix by using the correlation matrix; and estimating a transmission symbol for each MS by performing Multiple Input Multiple Output (MIMO) detection by using the interference-cancelled input vector and the interference-cancelled channel matrix.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: February 22, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Chung-Ryul Chang, Keun-Chul Hwang, Soon-Young Yoon, June Moon
  • Patent number: 7876838
    Abstract: A digital communications apparatus for processing a data vector includes a transmitter for communicating with a receiver across a channel having channel characteristics. A transmit vector is computed from the data vector and from values defining a basis for a transmit lattice. The transmit lattice defines a set of transmit symbols of length N and is related to an orthogonal receive lattice by the channel characteristics. The computation is performed according to an algorithm of order N complexity.
    Type: Grant
    Filed: June 17, 2004
    Date of Patent: January 25, 2011
    Inventors: Ian Vaughan Lyndon Clarkson, Iain Bruce Collings
  • Patent number: 7876856
    Abstract: Methods and apparatus to compensate for I/Q mismatch in quadrature receivers are disclosed. An example apparatus disclosed herein comprises a correction engine using first filter coefficients to compensate for I/Q mismatch present in a received quadrature signal; an adaptation engine to adapt second filter coefficients based on I/Q mismatch present in the received quadrature signal; and coefficient controller to occasionally adjust the first filter coefficients based on the second filter coefficients.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: January 25, 2011
    Assignee: Texas Instrumentals Incorporated
    Inventors: Imtinan Elahi, Khurram Muhammad
  • Patent number: 7873098
    Abstract: Detecting a symbol of interest comprises despreading a received signal to obtain despread values corresponding to the symbol of interest and to one or more interfering symbols, combining the despread values to generate combined values for the symbol of interest and the interfering symbols, computing spreading waveform correlations between the spreading waveform for the symbol of interest and the spreading waveforms for the interfering symbols, computing interference rejection terms representing the interference present in the combined value for the symbol of interest attributable to the interfering symbols based on the spreading waveform correlations, and generating an estimate of the symbol of interest by combining the combined values with the interference rejection terms. The interference rejection terms are computed by scaling the spreading waveform correlations by corresponding signal powers and compensating the estimates for noise.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: January 18, 2011
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Douglas A. Cairns, Yi-Pin Eric Wang, Gregory E. Bottomley
  • Patent number: 7873111
    Abstract: Method and system for synchronizing a receiver in an Orthogonal Frequency Division Multiplexing (OFDM) system. The method comprises transforming (105) a received signal from the time domain into the frequency domain to produce a transformed signal. The method further comprises rotating (110) each set of ranging tones of the transformed signal in the frequency domain based on a corresponding tone index to produce a set of phase-rotated frequency domain received ranging tones that is equivalent to time domain shifted ranging signals. Each ranging tone is rotated iteratively over a predefined set of delay-values and each delay-value within the predefined set of delay-values ranges from zero to a predetermined time delay. Also, the method comprises computing (115) a detection metric corresponding to each delay-value within the predefined set of delay-values based on the set of phase-rotated frequency domain received ranging tones.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: January 18, 2011
    Assignee: Motorola Mobility, Inc.
    Inventors: Gregory P. Spock, Xiaoyong Yu
  • Patent number: 7864910
    Abstract: A PLL is provided with an optimum operating point in order to have appropriately a frequency margin and a locking time. There is provided a phase looked loop which includes: a frequency divider for dividing an output signal by a dividing integer corresponding to an input code; an encoding unit for encoding the input code to generate an encoded code; and a loop filtering unit configured to adjust elements in response to the encoded code.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: January 4, 2011
    Assignee: Hynix Semiconductor Inc.
    Inventor: Keun-Soo Song
  • Patent number: 7860205
    Abstract: A timestamp-based clock synchronization technique is employed for CES in packet networks. The technique is based on a double exponential filtering technique and a linear process model. The linear process model is used to describe the behavior of clock synchronization errors between a transmitter and a receiver. The technique is particularly suitable for clock synchronization in networks where the transmitter and receiver are not driven from a common timing reference but the receiver requires timing reference traceable to the transmitter clock.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: December 28, 2010
    Assignee: Ciena Corporation
    Inventors: James Aweya, Michel Ouellette, Delfin Y. Montuno, Kent Felske
  • Patent number: 7860178
    Abstract: A guard section length detection method is disclosed. In the method, a guard section length detection method is used in an OFDM system. The OFDM symbol includes a data interval having a first length, and a guard section having a guard section length. The method detects a first symbol boundary and a second symbol boundary, and determines the guard section length based on a length between the first symbol boundary and the second symbol boundary.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: December 28, 2010
    Assignee: Industrial Technology Research Institute
    Inventors: Chun-Chun Kuo, Chin-Hung Chen, Chao-Kai Wen, Pang-An Ting
  • Patent number: 7856048
    Abstract: The disclosure can provide methods and systems for autocalibrating a transceiver. The method can include upconverting a bandpass input signal by mixing the bandpass input signal with a first local oscillator signal to form an initial transmitter signal. The initial transmitter signal can be looped back to a receiver and downconverted with a second local oscillator signal having a frequency that is different from the first local oscillator to form an intermediate frequency signal. At least one of a gain and a phase of the transmitter can be adjusted based on a transmitter image sideband of the intermediate frequency signal to generate a calibrated transmitter signal having minimized transmitter image sideband.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: December 21, 2010
    Assignee: Marvell International, Ltd.
    Inventors: Lydi Smaini, Neric Fong, Sang Won Son, Bo Wang
  • Patent number: 7852964
    Abstract: An antijam filter and method for filtering interference signals from signals received from the desired user in spatially multiplexed wireless communication systems. The antijam filter estimates the interference from known and unknown sources, and uses that estimate to filter the interference from the received signals. The filtered desired user signals are rendered for further signal processing using existing methods. The antijam filter and method are modular, with applicability to a wide range of wireless communication systems employing multiple antennas at the receiver.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: December 14, 2010
    Assignee: Mayflower Communications Company, Inc.
    Inventors: Gowri Shankar Rajappan, Ravi Sivasankaran, John Cafarella
  • Patent number: 7848385
    Abstract: Provided is a radio communication device which can make ACK reception quality and NACK reception quality to be equal to each other. The device includes: a scrambling unit (214) which multiplies a response signal after modulated, by a scrambling code “1” or “e?j(p/2)” so as to rotate a constellation for each of response signals on a cyclic shift axis; a spread unit (215) which performs a primary spread of the response signal by using a ZAC sequence set by a control unit (209); and a spread unit (218) which performs a secondary spread of the response signal after subjected to the primary spread, by using a block-wise spread code sequence set by the control unit (209).
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: December 7, 2010
    Assignee: Panasonic Corporation
    Inventors: Seigo Nakao, Daichi Imamura