Differential Patents (Class 375/244)
  • Patent number: 10749543
    Abstract: A radio frequency transmitter including two digital to analog converter circuits. The two radio frequency digital to analog converter circuits are configured to operate independently or operating in unison. Operating independently includes each radio frequency digital to analog converter circuit of the two radio frequency digital to analog converter circuits receiving separate baseband signals and separate local oscillation inputs. Operating in unison includes both of the two radio frequency digital to analog converter circuits receiving a single baseband signal and a single local oscillation input. The two radio frequency digital to analog converter circuits are configured to change between operating independently and operating in unison.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: August 18, 2020
    Assignee: MORSE MICRO PTY LTD
    Inventor: Andrew Terry
  • Patent number: 10666297
    Abstract: Decoding sequentially received vector signaling codewords to obtain sequential sets of data bits, wherein elements of each vector signaling codeword are received in parallel over a plurality of wires, generating an incremental update of a plurality of error correction syndrome values based on each sequential set of data bits according to a check matrix, and upon decoding of a final vector signaling codeword, performing a final incremental update of the plurality of error correction syndrome values and responsively modifying data bits within the sequential sets of data bits by selecting a set of data bits from the sequential sets of data bits according to a symbol position index determined from the plurality of error correction syndrome values, the selected set of data bits altered according to a bit error mask determined from a first error correction syndrome value of the plurality of error correction syndrome values.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: May 26, 2020
    Assignee: KANDOU LABS, S.A.
    Inventors: Amin Shokrollahi, Dario Carnelli
  • Patent number: 10446162
    Abstract: A very coarse quantization exceeding the measure determined by the masking threshold without or only very little quality losses is enabled by quantizing not immediately the prefiltered signal, but a prediction error obtained by forward-adaptive prediction of the prefiltered signal. Due to the forward adaptivity, the quantizing error has no negative effect on the prediction on the decoder side.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: October 15, 2019
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Jens Hirschfeld, Gerald Schuller, Manfred Lutzky, Ulrich Kraemer, Stefan Wabnik
  • Patent number: 10418958
    Abstract: A voice level comparator compares a level of a voice signal collected by a microphone with a VOX level. A transmission determination unit instructs a transmitter to transmit the voice signal, when the level of the voice signal is equal to or greater than the VOX level, based on a comparison result by the voice level comparator. A timer starts to measure an elapsed time from a point of time when a switch is operated. A VOX level selector seta a first VOX level as the VOX level when the elapsed time measured by the timer exceeds a reference elapsed time, and sets a second VOX level which is smaller than the first VOX level as the VOX level when the elapsed time measured by the timer stays within the reference elapsed time.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: September 17, 2019
    Assignee: JVC KENWOOD CORPORATION
    Inventor: Hiroshi Furuta
  • Patent number: 10251002
    Abstract: Disclosed herein, among other things, are apparatus and methods for noise characterization and attenuation for hearing assistance devices. In various embodiments, a method of operating a hearing assistance device includes receiving an audio signal using a microphone of the hearing assistance device and identifying a transient in the audio signal. Linear predictive coding (LPC) is used to isolate speech segments and non-speech segments of the transient and fluctuating noise, and the non-speech segments of the transient and fluctuating noise are attenuated to reduce annoyance of the noise and maintain audibility of perceptually important transients in speech.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: April 2, 2019
    Assignee: Starkey Laboratories, Inc.
    Inventors: Arthur Salvetti, Martin McKinney
  • Patent number: 10153935
    Abstract: Some demonstrative embodiments include apparatus, system and method of communicating a transmission according to a rotated 256 Quadrature Amplitude Modulation (QAM) scheme. For example, an apparatus may include logic and circuitry configured to cause a wireless station to modulate a Single Carrier (SC) transmission according to a rotated 256-QAM scheme; and to transmit the SC transmission over a millimeter Wave (mmWave) frequency band.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: December 11, 2018
    Assignee: INTEL CORPORATION
    Inventors: Artyom Lomayev, Alexander Kostin, Iaroslav P. Gagiev, Alexander Maltsev, Michael Genossar, Carlos Cordeiro
  • Patent number: 10043505
    Abstract: A transmitter comprises an analog-to-digital converter, an audio signal compressor, a framer, a scrambler, a modulator, and a transmitting unit. The analog-to-digital converter translates an analog audio signal into a digital Pulse-Code Modulation (PCM) format audio signal. The audio signal compressor compresses the PCM format audio signal into a coded bit stream with a modified Adaptive differential Pulse-code Modulation (ADPCM) algorithm. The framer packetizes the coded bit stream into a 1.125 ms frame data by adding a preamble, a signaling field, a data field, and a cyclic redundancy check field to the coded bit stream. The scrambler scrambles the frame data with an ID number. The modulator generates a modulated signal by modulating the scrambled frame data with a predetermined modulation scheme. The transmitting unit transmits the modulated signal.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: August 7, 2018
    Assignee: BEKEN CORPORATION
    Inventors: Weifeng Wang, Yiming Huang
  • Patent number: 9998302
    Abstract: Provided is a digital equalizer which outputs a decision value corresponding to reception data transmitted from a data transmitter and is located in a data receiver. The digital equalizer includes at least one flip-flop which stores an adjacent bit sequence which is previous computing information; and a computing device which receives an output value of an analog to digital converter as a first input value, receives the adjacent bit sequence as a second input value, and outputs the decision value which is a binary value of the first input value by referring to a lookup table with respect to the first input value and the second input value.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: June 12, 2018
    Assignee: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION, SEJONG CAMPUS
    Inventor: Hayun Cecillia Chung
  • Patent number: 9979920
    Abstract: A solid-state imaging device includes a pixel array, an AD converting unit converting each of a plurality of analog signals read from the pixel array to a plurality of digital signals and outputting the digital signals, a transmission mode selection register, first and second output terminals, a single-end driver which has first and second input terminals coupled to the digital signals and which has third and fourth terminals, and a differential driver which has third and fourth input terminals coupled to the digital signals and which has fifth and sixth terminals.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: May 22, 2018
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Tatsuya Mizuguchi
  • Patent number: 9693053
    Abstract: A video encoding device uses motion-compensated inter-frame prediction by dividing an image into blocks, each block a predetermined size, designating a first component value of a plurality of component values of a motion vector (MV) between an encoding target block and a neighboring block, designating a second component value, and encoding each first and second component values; a first component encoding means encodes a difference value of a first component and a second component encoding means, which obtains a probability of occurrence of a candidate value for the second component value of the MV of the encoding target block, based on a difference value between the first component value of the neighboring block MV and the first component value of the encoding target block MV and the second component value of the neighboring block MV, specifies a codeword of the second component value, encoding it based on the occurrence probability.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: June 27, 2017
    Assignee: Nippon Telegraph And Telephone Corporation
    Inventors: Yukihiro Bandoh, Shohei Matsuo, Seishi Takamura, Hirohisa Jozawa
  • Patent number: 9635301
    Abstract: The present invention provides a solid-state imaging device conforming to different data transmission modes. A driver in a CMOS sensor includes a single-end driver which is provided in correspondence with two output terminals, activated in a parallel transmission mode, and outputs a corresponding data signal as a single-end signal to a corresponding output terminal; a serializer which is activated in a serial transmission mode and outputs a plurality of data signals which are supplied in parallel, serially one by one, and a differential driver which is activated in the serial transmission mode and outputs each of data signals output from the serializer as a differential signal to the output terminals.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: April 25, 2017
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Tatsuya Mizuguchi
  • Patent number: 9489961
    Abstract: A method and apparatus are provided for controlling the shaping of encoding noise during the ADPCM encoding of a digital audio input signal. The noise-shaping is carried out through the use of feedback that comprises filtering noise. The method includes the following steps: obtaining a parameter for indicating a high spectral dynamic range of the signal, the parameter indicating a risk of instability of the feedback; detecting a risk of instability by comparing the indication parameter to at least one predetermined threshold; limiting the feedback in the event that a risk of instability is detected; and gradually reactivating the feedback over a predetermined number of frames subsequent to the current frame for which the feedback is limited. Also provided is an encoder with feedback, including a control module implementing the control method as described.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: November 8, 2016
    Assignee: FRANCE TELECOM
    Inventors: Stéphane Ragot, Balazs Kovesi, Alain Le Guyader
  • Patent number: 9369312
    Abstract: Methods are disclosed for creation of vector signaling codes having reduced or minimized electromagnetic emissions when transmitted over multiple conductor communications media such as microstrip channels. Particular code formulation constraints are shown to correlate with physical propagation characteristics leading to beneficial cancellation of far fields from adjacent signal conductors, and the number of such constraints may be chosen to balance EMI characteristics with information encoding capacity in the resulting code.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: June 14, 2016
    Assignee: KANDOU LABS, S.A.
    Inventors: Amin Shokrollahi, Nicolae Chiurtu
  • Patent number: 9363502
    Abstract: Provided are an apparatus for synchronizing a stereocamera, a stereocamera, and a method of synchronizing a stereocamera. The apparatus for synchronizing a stereocamera includes a synchronization error calculating unit configured to calculate a synchronization error from output signals of first and second image sensors, and a pulse adjusting unit configured to adjust a pulse of a synchronization signal of at least one of the first and second image sensors using the calculated error. In addition, the stereocamera and the method of synchronizing the same are provided.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: June 7, 2016
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Joo Hyun Kim, Soon Seok Kang
  • Patent number: 9363071
    Abstract: A clock recovery circuit is provided comprising a receiver circuit and a clock extraction circuit. The receiver circuit may be adapted to decode a differentially encoded signal on a plurality of data lines, where at least one data symbol is differentially encoded in state transitions of the differentially encoded signal. The clock extraction circuit may be adapted to obtain a clock signal from state transition signals derived from the state transitions.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: June 7, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Shoichiro Sengoku, Chulkyu Lee, George Alan Wiley, Joseph Cheung
  • Patent number: 9264081
    Abstract: Estimation of interference cancellation efficiency as disclosed herein advantageously accounts for the real-world or effective performance of interference cancellation by estimating the interference cancellation efficiency expected for a signal targeted for interference cancellation as a joint function of signal parameters for the targeted signal and one or more other signals that will remain after such cancellation. For example, a wireless communication apparatus, such as a user equipment configured for operation in a cellular communication network, is configured to estimate the interference cancellation efficiency expected for an interfering signal received in conjunction with a desired signal, based on a joint function of signal parameters for the interfering signal and the desired signal. Such processing extends directly, of course, to the consideration of multiple interferers and/or multiple desired signals, and may be carried out in each of two or more interference cancellation processing iterations.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: February 16, 2016
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Andreas Cedergren, Bo Lincoln, Andres Reial
  • Patent number: 9252919
    Abstract: Embodiments of the present invention provide a method and device for demodulating data. The method includes: determining a number of reliable bits of each path of data in M paths of data and a modulation manner used to demodulate the reliable bits of each path of data, where M is a positive integer; demodulating the reliable bits of each path of data according to the modulation manner used to demodulate the reliable bits of each path of data; and demodulating residual bits in each path of data except the reliable bits according to a maximal likelihood ML algorithm. Compared with the prior art, it is unnecessary to demodulate all bits of each path of data according to the ML algorithm, thereby lowering the complexity of demodulation by using the ML algorithm.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: February 2, 2016
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yinggang Du, Sheng Liu, Rui Wang
  • Patent number: 9209927
    Abstract: We describe and demonstrate a novel and simple scheme to generate flattened optical subcarriers using only phase modulators driven by single frequency fundamental sinusoidal sources. 160.8 Gb/s PM-QPSK experiment over a single subcarrier has been demonstrated.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: December 8, 2015
    Assignees: ZTE Corporation, ZTE (USA) Inc.
    Inventor: Jianjun Yu
  • Patent number: 9124285
    Abstract: A system for the calibration of a programmable system-on-a-chip is described. More specifically, embodiments of the present invention relate to a system that calibrates a programmable analog block in a system-on-a-chip without the use of external components.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: September 1, 2015
    Assignee: Cypress Semiconductor Corporation
    Inventors: Harold M. Kutz, Warren S. Snyder, Bert S. Sullam, Dennis R. Seguine, Gajender Rohilla, Eashwar Thiagarajan
  • Patent number: 9042462
    Abstract: Transport of differential signals is provided. In one aspect, a telecommunications system includes a first unit and a second unit. The first unit can calculate a differential signal from an original signal. The differential signal can represent a change in signal levels between constant time intervals in the original signal. The second unit can estimate the original signal from the differential signal received from the first unit over a communication medium.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: May 26, 2015
    Assignee: COMMSCOPE TECHNOLOGIES LLC
    Inventor: Van E. Hanson
  • Patent number: 8964905
    Abstract: The present invention relates to a low power serial link employing differential return-to-zero signaling. A receiver circuit consistent with some embodiments includes an input circuit for receiving differential serial data signals that form a differential return-to-zero signaling and a clock recovery circuit. The clock recovery circuit is coupled to the input circuit and includes a logic gate configured to generate a clock signal by using said differential serial data signals.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: February 24, 2015
    Assignee: NetLogic Microsystems, Inc.
    Inventor: Marc Loinaz
  • Patent number: 8964860
    Abstract: To provide a digital modulator including: a signal adjuster (105) which is provided with a plurality of output lines, and which outputs, to the output line, which corresponds to a range to which a level of an input signal belongs, a signal of a level corresponding to the level of the input signal; a plurality of internal digital modulators (111-1 to 111-N), each of which is provided so as to correspond to each of the plurality of output lines and carries out delta-sigma modulation on the signal of the corresponding output line to output the modulated signal; and an encoder (113) which encodes the plurality of modulated signals respectively outputted by the plurality of internal digital modulators.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: February 24, 2015
    Assignee: NEC Corporation
    Inventor: Shinichi Hori
  • Patent number: 8922400
    Abstract: A method is disclosed for compressing a sequence of initial digital values into a compressed sequence of compressed values, intending to restore these values into a decompressed sequence of decompressed values. For a first initial value of the sequence, the compressed value of the first initial value is equal to the first initial value and the decompressed value of the compressed value of the first initial value is equal to the first initial value.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: December 30, 2014
    Assignee: I-CES (Innovative Compression Engineering Solutions)
    Inventor: Than Marc-Eric Gervais
  • Patent number: 8908778
    Abstract: A rail-to-rail comparator including a first comparison unit connected to a first terminal and configured to compare differential input signals to differential reference voltages; a second comparison unit connected to a second terminal and configured to compare the differential input signals to the differential reference voltages; and an output unit configured to be driven in response to a clock signal and to generate a complementary output signal according to comparison results of the first and second comparison units.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: December 9, 2014
    Assignee: SK Hynix Inc.
    Inventors: Jin Il Chung, Jun Hyun Chun, Jin Wook Burm, Dae Ho Yun
  • Patent number: 8908807
    Abstract: Methods and apparatus are disclosed for transitioning a receiver from a first state to a second state using an in-band signal over a differential serial data link.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: December 9, 2014
    Assignee: Intel Corporation
    Inventor: Zale T. Schoenborn
  • Publication number: 20140321562
    Abstract: Transport of differential signals is provided. In one aspect, a telecommunications system includes a first unit and a second unit. The first unit can calculate a differential signal from an original signal. The differential signal can represent a change in signal levels between constant time intervals in the original signal. The second unit can estimate the original signal from the differential signal received from the first unit over a communication medium.
    Type: Application
    Filed: April 24, 2013
    Publication date: October 30, 2014
    Applicant: Andrew LLC
    Inventor: Van E. Hanson
  • Patent number: 8831125
    Abstract: Some of the example embodiments presented herein are directed towards an eNodeB (401), and corresponding method therein, for providing data transmission in a multiple antenna system. The eNodeB (401) may be configured to receive a plurality of signal quality assessments and a CSI report from a user equipment. Based on the received data the eNodeB (401) may determine a received power difference between the received data. The eNodeB (401) may further determine a beamforming direction for subsequent data transmissions. Based on the power difference, the eNodeB (401) may account for the received power difference in the subsequent data transmissions, thus improving data communications towards the user equipment.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: September 9, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Niklas Wernersson, David Hammarwall, Svante Bergman
  • Patent number: 8737490
    Abstract: The present disclosure relates to a method for analog-to-digital converter based decision feedback equalization. The method may include providing an integrated circuit including a SerDes circuitry having a transmit circuitry and a receiver circuitry. The method may further include receiving a high-speed data stream at the receiver circuitry and converting the high-speed data stream to a digital signal using a successive approximation analog-to-digital converter. The method may also include providing the digital signal to a digital decision feedback equalization circuitry via the successive approximation analog-to-digital converter.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: May 27, 2014
    Assignee: Cadence Design Systems, Inc.
    Inventors: Thomas Evan Wilson, Eric Harris Naviasky
  • Patent number: 8737491
    Abstract: The present disclosure relates to a method for Analog-to-Digital Converter Based Decision Feedback Equalization. The method may include providing an integrated circuit including a SERDES circuitry having a transmit circuitry and a receiver circuitry and receiving a high-speed data stream at the receiver circuitry. The method may also include converting the high-speed data stream to a digital signal using a successive approximation analog-to-digital converter and providing the digital signal to a digital decision feedback equalization circuitry via the successive approximation analog-to-digital converter. The method may also include generating an output signal at a phase locked loop and receiving the output signal at a multi-loop clock and data recovery circuitry.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: May 27, 2014
    Assignee: Cadence Design Systems, Inc.
    Inventors: Thomas Evan Wilson, Eric Harris Naviasky
  • Patent number: 8717212
    Abstract: An improved quadrature bandpass-sampling delta-sigma analog-to-digital demodulator is provided, which includes a loop filter, an A/D responsive to the loop filter, and a first feedback D/A responsive to the A/D up-converted in frequency by a first multiplier and a clock. A first summing circuit is responsive to the first D/A and an RF input for providing an input to the loop filter. A plurality of feedback D/As is responsive to the A/D up-converted in different frequencies by a plurality of multipliers and a plurality of clocks for providing feedback inputs to the loop filter. The loop filter comprises a plurality of resonators arranged in cascade configuration, a plurality of analog mixers to provide frequency shifting of the error signals propagating through the resonators, and a plurality of summing circuits responsive to the feedback D/As.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: May 6, 2014
    Assignee: Phuong Huynh
    Inventor: Phuong Huynh
  • Patent number: 8654864
    Abstract: In a communication system, data is selectively transmitted using single-ended or differential signaling. The data is transmitted in relation to a plurality of clock signals having different relative phases. When the data is transmitted using single-ended signaling, data on adjacent signal lines undergo logic transitions at different times in relation to the plurality of clock signals.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: February 18, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hoe-Ju Chung, Jung-Bae Lee
  • Patent number: 8619898
    Abstract: There is provided an information processing apparatus, including a signal receiving unit that receives a signal encoded in such a way that a signal containing a first bit value and a second bit value that are mutually different, wherein the first bit value is represented by a plurality of first amplitude values, the second bit value is represented by a second amplitude value that is different from the first amplitude values, a same amplitude value is not taken successively, and polarity of the amplitude value is reversed in each period, an amplitude square unit that squares an amplitude of the signal received by the signal receiving unit, and an input data decoding unit that decodes an input data by determining the first and second bit values based on the amplitude value of the signal output from the amplitude square unit.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: December 31, 2013
    Assignee: Sony Corporation
    Inventors: Takehiro Sugita, Kunio Fukuda
  • Patent number: 8559530
    Abstract: In some embodiments, the inventions includes a transmitter including a cycle encoding circuit to receive a data input signal and to provide a full cycle encoded signal in response thereto by continuously joining portions of different encoding signals. Some of the encoding signals have a different frequency than others of the encoding signals and some of the encoding signals have a different phase than others of the encoding signals. Data is represented in data time segments of the full cycle encoded signal and no data time segment has more than one cycle of an encoding signal. In some embodiments, a receiver receives the cycle encoded signal and recovers data of the data input signal.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: October 15, 2013
    Assignee: Intel Corporation
    Inventors: Jerry G. Jex, Jed D. Griffin, Arnaud J. Forestier, Kersi H. Vakil, Abhimanyu Kolla
  • Patent number: 8537888
    Abstract: A method, device, and computer-readable medium for video coding or decoding wherein a number of blocks of residual picture data respectively stored in a number of first data arrays in a memory of a computer device represent at least a part of a video picture to be coded or decoded. The method includes calculating DC coefficients respectively associated with the blocks and inserting the DC coefficients in a second data array in a block associative order, classifying each of the blocks as skipped in response to an associated DC coefficient being lower than a predefined threshold, and non-skipped in response to the associated DC coefficient being higher than a predefined threshold, generating a bit mask containing 1-bits in positions corresponding to positions in the second data array having DC coefficients higher than the predefined threshold, and 0-bits in positions corresponding to positions in the second data array having DC coefficients lower than the predefined threshold.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: September 17, 2013
    Assignee: Cisco Technology, Inc.
    Inventor: Lars Petter Endresen
  • Publication number: 20130230111
    Abstract: A method for coordinating an encoder and a decoder in a wireless communication system employing discontinuous transmission, the method comprising performing a syncless reset command on the encoder and the decoder, in order to bring the encoder and decoder into stable and compatible states. The syncless reset command can be implemented by setting the variables of the encoder and decoder into predetermined values, or by performing a normal reset command followed by encoding or decoding a predetermined number of predetermined sample values.
    Type: Application
    Filed: November 18, 2010
    Publication date: September 5, 2013
    Applicant: DSP Group LTD.
    Inventor: Arie Gur
  • Patent number: 8509317
    Abstract: A method for detecting signals in a TMDS transmission system having a channel established between a receiver and a transmitter includes separating loadings of the receiver from the channel, providing a first reference current in a first differential line of the channel, providing a second reference current in a second differential line of the channel, computing a difference between the first reference current and a current provided by the transmitter via the first differential line to obtain a first current difference, computing a difference between the second reference current and a current provided by the transmitter via the second differential line to obtain a second current difference, and determining an operating state of the transmitter according to the first current difference and the second current difference.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: August 13, 2013
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Chiao-Wei Hsiao, Kuo-Chi Chen, Shyr-Chyau Luo
  • Patent number: 8503568
    Abstract: A differential encoding and decoding system and method for multiplexed data is disclosed. The multiplexed data is formed from a plurality of input data sources. The differential encoding and decoding uses a delay proportional to the number of input data streams in the plurality. In this fashion, errors that propagate from an error in one of the input data sources does not interfere with other input data sources upon de-multiplexing.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: August 6, 2013
    Assignee: The Boeing Company
    Inventors: Brian K. Pheiffer, Chak M. Chie
  • Patent number: 8502720
    Abstract: A digital to analog conversion apparatus includes a plurality of gain/phase adjusters configured to receive a digital signal and to output a plurality of adjusted digital input signals, a plurality of digital to analog converters coupled to respective ones of the plurality of gain/phase adjusters and configured to receive the adjusted digital input signals and to generate respective analog signals representative of the adjusted digital input signals, a plurality of phase shift elements coupled to respective ones of the plurality of digital to analog converters and configured to shift the phases of the analog signals generated by the digital to analog converters, and a combiner coupled to the outputs of the plurality of digital to analog converters and configured to combine the respective phase-shifted analog signals to form an analog output signal.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: August 6, 2013
    Assignee: Telefonaktiebolaget L M Ericsson
    Inventor: Mark Wyville
  • Patent number: 8488720
    Abstract: Methods and systems for signal quantization may include, but are not limited to: receiving a complex signal characterized by a real portion and an imaginary portion; computing a vector magnitude of a sample of the complex signal; comparing the vector magnitude of the sample to a quantization threshold value; and associating a quantized magnitude with the sample according to a comparison between the vector magnitude of the sample and the quantization threshold value.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: July 16, 2013
    Assignee: Rockwell Collins, Inc.
    Inventor: Carlos J. Chavez
  • Patent number: 8462857
    Abstract: In a method for decoding digital information, a bit-stream signal comprising binary information is received at a digital receiver utilizing wired communication. The received bit-stream signal is sampled for each binary value at least two different sampling points within an eye pattern associated with the related binary value in order to obtain a hard-bit value for each sampling point. A single soft-bit value for each binary value based on the hard-bit values of the relevant binary value is generated and the bit value of the binary value is determined by subjecting the soft-bit values to a soft-decision algorithm.
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: June 11, 2013
    Assignee: Nokia Siemens Networks GmbH & Co. KG
    Inventor: Christoph Werner
  • Patent number: 8432977
    Abstract: There is provided an information processing apparatus including an encoding unit that represents input data containing mutually different first and second bit values by a plurality of first amplitude values for the first bit value and a second amplitude value that is different from the first amplitude values for the second bit value, does not take an identical value consecutively, and perform encoding so that polarity of the amplitude value is reversed for each cycle, and a transmission unit that transmits a signal encoded by the encoding unit through a predetermined transmission line.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: April 30, 2013
    Assignee: Sony Corporation
    Inventor: Kunio Fukuda
  • Patent number: 8406314
    Abstract: Methods of, and devices, and systems for differential pulse code modulation (DPCM) having predictions and quantization parameters based on proximate lines of buffered quanta of information where pulse code modulation (PCM) is employed as a backup means.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: March 26, 2013
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Shawmin Lei, Yeping Su
  • Patent number: 8396164
    Abstract: A receiving device includes a receiving circuit and an impedance control circuit. The receiving circuit receives a signal transmitted through a communication line. The impedance control circuit is coupled with the receiving circuit and has a detecting part. The detecting part detects a physical value of the signal and the physical value includes at least one of a voltage, an electric current, and an electric power. The impedance control circuit changes an input impedance based on the detected value so that a ringing of the signal is reduced.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: March 12, 2013
    Assignees: DENSO CORPORATION, Nippon Soken, Inc.
    Inventors: Youichirou Suzuki, Noboru Maeda, Takashi Nakano, Kazuyoshi Nagase, Koji Kondo, Shigeki Takahashi, Yoshihiko Ozeki
  • Patent number: 8363737
    Abstract: In one embodiment, a method includes receiving a carrier signal transmitted by a base station according to either a first data-transmission protocol or a second data-transmission protocol; detecting a first field gap in the carrier signal indicating initiation of a data transmission by the base station; and determining whether a reference duration is present in the carrier signal after the first field gap. The method includes, if the reference duration is present in the carrier signal after the first field gap then, according to the first data-transmission protocol, determining a calibration value for the data transmission based on the reference duration and decoding the data transmission by measuring durations between successive subsequent field gaps and determining whether each duration as measured is a binary 1 or binary 0 based on the calibration value.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: January 29, 2013
    Assignee: Atmel Corporation
    Inventors: Alexander Kurz, Mathew Neal
  • Patent number: 8344933
    Abstract: A radar system has an antenna. The system includes electronics configured to facilitate communication using radar returns received and transmitted by the antenna. The electronics is configured to extract communications data from a received radar return. The electronics is further configured to provide communications data with an outgoing radar pulse for data transmission.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: January 1, 2013
    Assignee: Rockwell Collins, Inc.
    Inventors: Kevin M. Kronfeld, Daniel L. Woodell, Roy E. Robertson, Venkata A. Sishtla
  • Patent number: 8340445
    Abstract: An image encoding device comprises: a predicted value generation means for predicting target pixel data which is the pixel data of an encoding target pixel to generate predicted value data; a subtractor for calculating the difference value between the target pixel data and the predicted value data to generate difference value data; an encoding mode decision means for determining an encoding mode based on the difference value data and temporarily holding it in a buffer; an encoding target decision means for determining which data of the target pixel or the difference value is used as encoding target data to be encoded based on the encoding mode; a quantization means for applying a quantization processing to the encoding target data based on the encoding mode to generate quantized data; and a fixed-length code generation means for adding the encoding mode to the quantized data to generate a fixed-length code.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: December 25, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masayuki Yamaguchi, Akihisa Yamada, Shinichi Maeta
  • Patent number: 8300711
    Abstract: An adaptive differential pulse-code modulation-demodulation system and method thereof is provided. The method includes steps of modulating an analog audio input signal into a data packet, including a plurality of digital data through adaptive differential pulse-code modulation, an initial value and a scale factor associated with the digital data, to be sent to the communication network, and demodulating the data packet according to the digital data, the initial value and the scale factor, thereby reconstructing the data packet to an analog audio output signal.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: October 30, 2012
    Assignee: MStar Semiconductor, Inc.
    Inventor: Chu-Feng Lien
  • Patent number: 8284848
    Abstract: A differential data transferring system and method uses three level voltages to simultaneously transfer three signals (for example, two data signals and one clock signal) across two transfer line sets (i.e., four transfer lines). Therefore, the differential data transferring method increases transferring efficiency by using fewer transfer lines. Also, according to the differential data transferring system and method, one of two transfer lines forming a transfer line set is controlled to a middle voltage level, while the other transfer line is controlled to either a high voltage or a low voltage. Accordingly, the voltage difference between the two transfer lines may be maintained at a constant amplitude. Additionally, the difference between first and second dividing voltages DC1 and DC2, which are used for generating a reference output data, is controlled to maintain a constant amplitude. Therefore, the differential data transferring system and method may provide improved operation reliability.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: October 9, 2012
    Assignee: TLI Inc.
    Inventors: Jang Jin Nam, Yong Weon Jeon
  • Patent number: 8275075
    Abstract: A system and method implement low complexity maximum likelihood sequence detection. A decision feedback algorithm computes x(M+D+L?1). Optimality examination is performed for x(M), and state values and values of Markov states along paths from states in x(M) to xl(M+L) are computed.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: September 25, 2012
    Assignee: Colorado State University Research Foundation
    Inventor: Jie Luo
  • Patent number: RE46188
    Abstract: A transmitting system, a receiving system, and a method of processing broadcast signals are disclosed. Herein, the transmitting system includes an RS frame encoder, a block processor, a group formatter, and a trellis encoding module. The RS frame encoder performs error correction encoding on an RS frame payload including mobile service data so as to form an RS frame, divides the RS frame into a plurality of portions, and outputs the divided RS frame portions. The block processor performs one of ½-rate encoding and ¼-rate encoding on each bit of the mobile service data included in each portion. The group formatter maps a portion including symbols of the ¼-rate encoded mobile service data and symbols of the ½-rate encoded mobile service data to a corresponding region of a data group. And, the trellis encoding module performs trellis encoding on the symbols of the ¼-rate encoded mobile service data and the symbols of the ½-rate encoded mobile service data of the data group.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: October 25, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Jin Woo Kim, Kook Yeon Kwak, Byoung Gill Kim, Won Gyu Song, Chul Kyu Mun, Hyoung Gon Lee, In Hwan Choi