Pulse Code Modulation Patents (Class 375/242)
  • Patent number: 10771168
    Abstract: Generating of a broadband signal by generating multiple RF signals having a limited frequency range and combining the multiple RF signals. The generation of the individual RF signals is controlled based on a feedback loop measuring the combination of the multiple RF signals and adjusting at least one operational parameter in a device generating RF signals having the limited bandwidth.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: September 8, 2020
    Assignee: ROHDE & SCHWARZ GMBH & CO. KG
    Inventors: Marcus Büche, Jonas Scherer
  • Patent number: 10715778
    Abstract: The present invention relates to a video signal transmission device and the like that can support a variety of system specifications. The device includes a packer unit, an encoder unit, and a serializer. The packer unit generates, from a video signal of one or more pixels, a plurality of block signals having a packet configuration of size corresponding to the number of pixels and the number of tone bits of a color signal constituting a video signal. At this time, a control signal including a pulse having a width corresponding to the number of pixels and the number of tone bits is also generated. The encoder unit applies encoding processing having encoding efficiencies that are different between a first period and a second period of a control signal that are distinguished depending on existence or non-existence of a pulse to the block signals.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: July 14, 2020
    Assignee: THINE ELECTRONICS, INC.
    Inventors: Satoshi Miura, Yoshimichi Murakami, Shuhei Yamamoto
  • Patent number: 10652685
    Abstract: The present research relates to controlling rendering of multi-object or multi-channel audio signals. The present research provides a method and apparatus for controlling rendering of multi-object or multi-channel audio signals based on spatial cues in a process of decoding the multi-object or multi-channel audio signals. To achieve the purpose, the method suggested in the research controls rendering in a spatial cue domain in the process of decoding the multi-object or multi-channel audio signals.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: May 12, 2020
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Seung-Kwon Beack, Jeong-Il Seo, Dae-Young Jang, Tae-Jin Lee, Yong-Ju Lee, Jin-Woo Hong, Jin-Woong Kim
  • Patent number: 10615911
    Abstract: This application discloses a data processing method and apparatus. The method includes: distributing, by a first distribution circuit, a first bit stream to FEC encoders 1 to N in a round robin fashion, where digital signals 1 to N that are output after being encoded by the FEC encoders 1 to N are in a one-to-one correspondence with a least significant bit to a most significant bit of an input signal of a PAM circuit, a coding gain GX of an FEC encoder X is greater than a coding gain GY of an FEC encoder Y, 1?X<Y?N, N?2, and X, Y, and N are all integers. In the method, different FEC coding gains can be provided for links with different bit error rates, so that a requirement of a high-rate Ethernet for a high gain during long-distance data transmission is met, and physical-layer resources occupied by FEC are reduced.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: April 7, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Wenbin Yang, Xinyuan Wang, Tongtong Wang, Penghao Si
  • Patent number: 10601442
    Abstract: Methods and systems for encoding of integers are discussed. For example, various methods and systems may utilize Huffman coding, Tunstall coding, Arithmetic Coding, LZ77 coding, LZ78 coding, LW coding, or Shannon Fano Elias coding to encode the integers.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: March 24, 2020
    Assignee: IDENSIFY LLC
    Inventors: Dan E. Tamir, Peter Jeremy Wilson
  • Patent number: 10602171
    Abstract: A video decoder may perform, based on an operation mode, at least one of a first decoding operation to restore a first bin value based on a first context value, a second decoding operation to restore a second bin value based on an updated first context value or a second context value, a third decoding operation to restore a third bin value based on the updated first context value or a third context value, and a fourth decoding operation to restore at least one bypass bin value without a context value. Based on the operation mode, the video decoder may output the first bin value, the at least one bypass bin value, the first bin value and the at least one bypass bin value, the first bin value and one of the second and third bin values, or at least one of the first, second, and third bin values.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: March 24, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Kyung-Koo Lee
  • Patent number: 10502593
    Abstract: Optical Position Encoders and methods using the same are described. In embodiments, the optical position encoders include a multitrack Hybrid Cyclic Binary Code-2 (HCBC-2) encoded scale and an Optical Readout Assembly (ORA), where the ORA provides absolute position optical readout and automatic physical alignment to the scale. Linear optical position encoders, rotary optical position encoders, and methods of measuring the position of ORA relative to a scale using such encoders are also described.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: December 10, 2019
    Inventors: Philip M. Johnson, David K. Johnson
  • Patent number: 10419663
    Abstract: A semiconductor device includes: an encoding processing unit that stores an encoded stream of an input data that is encoded based on the specified encoding control information; a buffer management unit that calculates the transmission buffer occupancy indicating the amount of data stored in a transmission buffer according to the generated data amount, and the reception buffer occupancy indicating the amount of data stored in a reception buffer, which is the destination of the encoded stream; and a control information specifying unit that, when the transmission buffer occupancy is equal to or less than a first threshold, specifies the encoding control information based on the reception buffer occupancy, and when the transmission buffer occupancy is greater than the first threshold, specifies the encoding control information to further reduce the generated data amount than in the case of equal to or less than the first threshold, to the encoding processing unit.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: September 17, 2019
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Tetsuya Shibayama, Toshiyuki Kaya, Seiji Mochizuki, Ryoji Hashimoto
  • Patent number: 10397537
    Abstract: The present invention relates to a video signal transmission device and the like that can support a variety of system specifications. The device includes a packer unit, an encoder unit, and a serializer. The packer unit generates, from a video signal of one or more pixels, a plurality of block signals having a packet configuration of size corresponding to the number of pixels and the number of tone bits of a color signal constituting a video signal. At this time, a control signal including a pulse having a width corresponding to the number of pixels and the number of tone bits is also generated. The encoder unit applies encoding processing having encoding efficiencies that are different between a first period and a second period of a control signal that are distinguished depending on existence or non-existence of a pulse to the block signals.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: August 27, 2019
    Assignee: THINE ELECTRONICS, INC.
    Inventors: Satoshi Miura, Yoshimichi Murakami, Shuhei Yamamoto
  • Patent number: 10334261
    Abstract: An example method includes receiving a video bitstream with a high fidelity input format and side information related to the video bitstream. The side information includes a video bitstream representing the original video source with a low fidelity input format, coding parameters optimized based on knowledge of the original video source, transform coefficients, indicative of a residual between the original video source and a decoded version of the high fidelity format. The method further includes decoding the side information to generate transcoding guiding information, estimating a representation of video bitstream with a low fidelity output format, based on the received bit stream and the generated transcoding guiding information, improving the estimated low-fidelity representation by adding the transform coefficients of the side information to transform coefficients generated from the estimated low-fidelity representation, and encoding the improved estimated representation of the low-fidelity bitstream.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: June 25, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Kenneth Andersson, Thomas Rusert, Jonatan Samuelsson, Richard Sjöberg
  • Patent number: 10333641
    Abstract: A receiver node for use in a digital broadcast system, comprising a receiver configured to receive a signal containing a service encoded with an error correcting code for decoding and wherein said receiver is further configured to ignore the signal during an ignore period, the node configured to use said error correcting code and the encoded service received outside the ignore period to reconstruct the part of the service ignored by the receiver.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: June 25, 2019
    Assignee: NXP B.V.
    Inventor: Martin Kessel
  • Patent number: 10302698
    Abstract: Disclosed approaches of determining an estimated glitch toggle rate at an output of a logic circuit include inputting functional static probabilities of combinations of states of the plurality of inputs and a generated glitch toggle rate of the logic circuit. Each functional static probability indicates a probability of the states of the inputs of the combination. For each input of the plurality of inputs to the logic circuit, a Boolean Difference Function (BDF) of the input is generated. A maximum glitch rate, which is the estimated glitch toggle rate, is determined based on the generated glitch toggle rate and the functional static probabilities associated with selected combinations of states of the BDF.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: May 28, 2019
    Assignee: XILINX, INC.
    Inventors: Fan Zhang, Anup K. Sultania
  • Patent number: 10256946
    Abstract: Disclosed is a method for decoding an optical data signal. Said optical data signal is phase and amplitude modulated according to a constellation diagram with at least eight constellation points representing non-binary symbols. Said decoding method comprises the following steps: —carrying out a carrier phase recovery of a received signal ignoring the possible occurrence of phase slips, —decoding said signal after phase recovery, wherein in said decoding, possible cycle slips occurring during phase recovery are modelled as virtual input to an equivalent encoder assumed by the decoding scheme. Further disclosed are a related encoding method as well as a receiver and a transmitter.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: April 9, 2019
    Assignee: Xieon Networks S.à.r.l.
    Inventor: Stefano Calabro
  • Patent number: 10186042
    Abstract: An object matching method is applied to a camera system with an object matching function. The object matching method includes detecting a moving object within overlapped monitoring areas of two image capturing units to generate a first coordinate point and a second coordinate point respectively upon a first coordinate system and a second coordinate system, calculating at least one transforming parameter of the first coordinate system relative to the second coordinate system, acquiring a reliability level according to a comparison result between the transforming parameter and a threshold, determining a final transform parameter by the reliability level, utilizing the final transform parameter to transform the first coordinate point into a third coordinate point upon the second coordinate system, and determining whether the first coordinate point and the second coordinate point indicate the same object by difference between the third coordinate point and the second coordinate point.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: January 22, 2019
    Assignee: VIVOTEK INC.
    Inventors: Cheng-Chieh Liu, Wei-Ming Liu
  • Patent number: 10164732
    Abstract: An encoding circuit for selecting a transmit data symbol for transmission over a data bus may include an alternate symbol generation circuit configured to generate an alternate data symbol based on an encoded data symbol scheduled for transmission over the data bus and a decision circuit configured to select the encoded data symbol or the alternate data symbol as the transmit symbol based on a plurality of phasors. The decision circuit may include a plurality of phasor generation circuits configured to generate the plurality of phasors based on the encoded data symbol and a plurality of target frequencies.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: December 25, 2018
    Assignee: Intel IP Corporation
    Inventors: Christoph Schultz, William Dawson Kesling, Eytan Mann
  • Patent number: 10091662
    Abstract: An example method may include a processing system of a device having a processor capturing, at a first position comprising a first location and a first spatial orientation of the device, a first measurement of a performance indicator based upon at least a first wireless signal from a base station of a beamformed wireless communication network and capturing, at a second position comprising a second location and a second spatial orientation of the device, a second measurement of the performance indicator based upon at least a second wireless signal from the base station of the beamformed wireless communication network. The method may include the processing system selecting a position for a deployment of the device based upon the first measurement of the performance indicator and the second measurement of the performance indicator and providing at least one instruction for the deployment of the device at the position that is selected.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: October 2, 2018
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Ralf Bendlin, Saeed Ghassemzadeh, Aditya Chopra, Arunabha Ghosh
  • Patent number: 10020821
    Abstract: A transmission device and reception device for digital data that have excellent resistance to noise are provided. An encoder (11-1) of this disclosure, included in a transmission device (1) of this disclosure, applies LDPC encoding to digital data using a unique check matrix for each code rate by using a check matrix in which, taking a check matrix initial value table established in advance for each code rate at a code length of 44880 bits as initial values, 1 entries of a partial matrix corresponding to an information length appropriate for a code rate of 93/120 are allocated in the column direction over a cycle of 374 columns. A demodulator (23) of this disclosure, included in a reception device (2) of this disclosure, decodes digital data encoded by the encoder (11-1).
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: July 10, 2018
    Assignee: NIPPON HOSO KYOKAI
    Inventors: Youichi Suzuki, Akinori Hashimoto, Shoji Tanaka, Kenichi Tsuchida, Takeshi Kimura, Yoshifumi Matsusaki
  • Patent number: 9979332
    Abstract: A chiller system includes a compressor configured to circulate a refrigerant between an evaporator and a condenser in a closed refrigerant loop and a synchronous motor configured to drive the compressor. The motor includes a stator winding and a rotor. The chiller system includes a controller configured to estimate a flux linkage of the rotor and generate a control signal for the motor based on the estimated flux linkage. Estimating the flux linkage includes applying a voltage of the stator winding to a transfer function having an error correction variable, using a first value of the error correction variable in the transfer function to obtain convergence of the flux linkage over an initial motor starting interval, and using a second value of the error correction variable after the initial motor starting interval to reduce an error in estimating the flux linkage.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: May 22, 2018
    Assignee: Johnson Controls Technology Company
    Inventors: Zhiqiao Wu, Ivan Jadric
  • Patent number: 9948928
    Abstract: A method for processing an image, the method comprising retrieving an image, encoding the image as a string of components, deriving an exponent for each component, deriving mantissas wherein at least an approximation of each component can be derived from the exponents and mantissas, and wherein each exponent indicates the number of bits in its accompanying mantissa, compressing at least the exponents, and storing the exponents and the mantissas in a memory. There is also provided a apparatus for processing an image.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: April 17, 2018
    Assignee: NXP USA, Inc.
    Inventors: Shlomo Beer-Gingold, Ofer Naaman, Michael Zarubinsky
  • Patent number: 9900146
    Abstract: An encrypted text matching system includes: an auxiliary data generating unit that generates first and second auxiliary data, which are for verification of matching between a first encrypted text that is obtained by encrypting input data and is registered with a storage device and a second encrypted text that is obtained by encrypting input data to be matched, the verification being performed by using a Hamming distance between plaintexts; and a matching determining unit that performs one-way conversion on at least part of the second auxiliary data, performs one-way conversion on intermediate data that is generated based on a difference between the first encrypted text and the second encrypted text and on the first auxiliary data, and determines whether a Hamming distance between plaintexts is equal to or less than a predetermined value, the Hamming distance corresponding to the difference between the first and second encrypted text.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: February 20, 2018
    Assignee: NEC CORPORATION
    Inventors: Toshiyuki Isshiki, Kengo Mori, Toshinori Araki
  • Patent number: 9900201
    Abstract: A time de-interleaving circuit and a time de-interleaving method perform a time de-interleaving process through writing and reading a plurality of sets of time interleaved data into and from a first memory and a second memory. The time de-interleaving method includes: selecting a set of first time interleaved data and a set of second time interleaved data from the plurality of sets of time interleaved data, the set of first time interleaved data and the set of second time interleaved data having the same delay length; writing the set of first time interleaved data into the first memory; and writing the set of second time interleaved data into the second memory. The first memory utilizes a bit length as an access unit, and the second memory has an access unit smaller than the bit width.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: February 20, 2018
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventor: Chun-Chieh Wang
  • Patent number: 9787566
    Abstract: Various systems and methods for probing a communication channel. These systems and methods transmit an error vector probe packet from a first transmitter while a second transmitter is active and transmitting. A network device may receive the error vector probe packet and measure an error vector magnitude based on the received error vector probe packet. Using the error vector magnitude, the network device estimates channel characteristics such as signal-to-noise ratio, data capacity, etc. The transmission can occur when more than one transmitter is active and transmitting. At least some of the other transmitters are active and transmit an analog zero signal, e.g., all digital zeros on the input to the digital-to-analog converter of a network device when an error vector probe packet is transmitted.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: October 10, 2017
    Assignee: Entropic Communications LLC
    Inventor: Arndt Mueller
  • Patent number: 9769473
    Abstract: Video coders may perform perspective transformation of reference frames during coding in a manner that conserves processing resources. When a new input frame is available for coding, a camera position for the input frame may be estimated. A video coder may search for reference pictures having similar camera positions as the position of the input frame and, for each reference picture identified, the video coder may perform a prediction search to identify a reference picture that is the best prediction match for the input frame. Once the video coder identifies a reference picture to serve as a prediction source for the input frame, the video coder may derive a transform to match the reference frame data to the input frame data and may transform the reference picture accordingly. The video coder may code the input frame using the transformed reference picture as a prediction reference and may transmit coded frame data and the camera position of the input frame to a decoder.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: September 19, 2017
    Assignee: APPLE INC.
    Inventors: Yao-Chung Lin, Xiaosong Zhou, Hsi-Jung Wu, Douglas Scott Price, Chris Y. Chung, Dazhong Zhang
  • Patent number: 9548063
    Abstract: Embodiments of method and apparatus for acoustic echo control are described. According to the method, an echo energy-based doubletalk detection is performed to determine whether there is a doubletalk in a microphone signal with reference to a loudspeaker signal. A spectral similarity between spectra of the microphone signal and the loudspeaker signal is calculated. It is determined that there is no doubletalk in the microphone signal if the spectral similarity is higher than a threshold level. Adaption of an adaptive filter for applying acoustic echo cancellation or acoustic echo suppression on the microphone signal is enabled if it is determined that there is no doubletalk in the microphone signal through the echo energy-based doubletalk detection, or there is no doubletalk through the spectral similarity-based doubletalk detection.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: January 17, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Dong Shi, JiaQuan Huo, Xuejing Sun, Glenn N. Dickins
  • Patent number: 9454426
    Abstract: Embodiments include generating an error correction code by identifying two error-correcting codes of length n with minimum distances d and 2d, such that the second code is contained into the first code. Data is then encoded into t?1 blocks using the first code, and into the t-th block using the second block. The first t?1 encoded blocks are stored into t?1 blocks of memory locations, while the exclusive-OR (XOR) of such t?1 encoded blocks and the t-th encoded block is stored into a t-th block of memory location. The final encoded vector of length to is identified as belonging in a code with minimum distance 2d. Rotations of an encoded vector jn times are identified as belonging to the same equivalence class. A received vector or its rotations jn times can be successfully identified in the presence of up to d?1 errors, while d errors are identified as uncorrectable errors.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: September 27, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: John S. Best, Mario Blaum, Steven R. Hetzler
  • Patent number: 9385903
    Abstract: This invention proposes an alternative modulation format for channels that present improved performance when such channels co-propagate with existing intensity modulated channels. This modulation format is named Rhombic-QPSK (R-QPSK) and it is designed in such a way that it presents more tolerance to phase noise created by the nonlinear interaction with the legacy channels.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: July 5, 2016
    Assignee: NEC Corporation
    Inventors: Eduardo Mateo Rodriquez, Fatih Yaman, Shaoliang Zhang, Ting Wang
  • Patent number: 9251801
    Abstract: In one embodiment, the method for rendering a music signal compatible with a discontinuous transmission codec includes detecting a period of silence within an initial music signal, producing an auxiliary audio signal whose amplitude is less than that of the initial signal outside of the period of silence, but sufficient to not be detectable as silence by a discontinuous transmission codec, and replacing the initial music signal with the auxiliary signal during the period of silence.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: February 2, 2016
    Assignee: Alcatel Lucent
    Inventor: Jean-Yves Grand
  • Patent number: 9143220
    Abstract: The present invention relates to a digital retro-directive system and method thereof for receiving incoming signals from a transmitting source by means of at least two antennas and transmitting outgoing signals back, substantially, simultaneously, towards said transmitting source through said at least two antennas irrespective of the location of one antenna with respect to another and without calculating phase differences between said outgoing signals.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: September 22, 2015
    Assignee: ELTA SYSTEMS LTD.
    Inventors: Moshe Fireaizen, Ofer Shariv
  • Patent number: 9143851
    Abstract: A microphone arrangement has an SMD housing with a sound inlet opening. A transducer receives sound waves through the sound inlet opening and converts the received sound waves into electrical signals. An analog-to-digital converter provides digital signals. An interface control unit with a digital interface is used by the chip to transmit data serially to an external device. At least one further interface is connected to a peripheral device such that the at least one further interface can be used to transmit data between the peripheral devices and the interface control unit. The transducer, the analog-to-digital converter, the interface control unit and the at least one further interface are integrated in the SMD housing.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: September 22, 2015
    Assignee: EPCOS AG
    Inventor: Armin Schober
  • Patent number: 9065607
    Abstract: A clock data recovery circuit includes: an oscillator that outputs a clock signal; a phase comparator that outputs a signal corresponding to a phase difference between an input reception data signal and the clock signal; a divider that outputs a feedback clock signal; a first variable delay circuit that outputs a delay data signal; a second variable delay circuit that outputs a delay feedback clock signal; a frequency phase comparator that outputs a signal corresponding to a frequency difference and a phase difference between the delay data signal and the delay feedback clock signal; a lock detector that outputs a determination signal indicating whether or not the frequency difference and the phase difference are within a predetermined range; and a multiplexer that receives the determination signal and select a signal of the phase comparator and a signal of the frequency phase comparator.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: June 23, 2015
    Assignee: Sony Corporation
    Inventors: Kenichi Maruko, Yosuke Ueno
  • Patent number: 9036081
    Abstract: A video transmission device 10 has: a packer 11 which receives a video signal, a sync signal, and a data-enable signal, and generates a plurality of packet signals by packetizing the video signal and the sync signal based on the data-enable signal and according to the number of bytes of a packet corresponding to the number of gradation bits of the video signal; an encode unit 15 which generates a plurality of encoded packet signals by encoding the plurality of packet signals; and a serializer 14 which generates a serial packet signal by parallel-serial converting the plurality of encoded packet signals. The packer 11 generates a control signal including a pulse with a pulse width corresponding to the number of bytes of the packet, and the encode unit 15 subjects a portion of the packet signals corresponding to the pulse in the control signal from the packer, to an encode process which is different from a process for the other portion.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: May 19, 2015
    Assignee: THINE ELECTRONICS, INC.
    Inventor: Seiichi Ozawa
  • Patent number: 9026434
    Abstract: An audio coding terminal and method is provided. The terminal includes a coding mode setting unit to set an operation mode, from plural operation modes, for input audio coding by a codec configured to code the input audio based on the set operation mode such that when the set operation mode is a high frame erasure rate (FER) mode the codec codes a current frame of the input audio according to a select frame erasure concealment (FEC) mode of one or more FEC modes. Upon the setting of the operation mode to be the High FER mode the one FEC mode is selected, from the one or more FEC modes predetermined for the High FER mode, to control the codec by incorporating of redundancy within a coding of the input audio or as separate redundancy information separate from the coded input audio according to the selected one FEC mode.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: May 5, 2015
    Assignee: Samsung Electronic Co., Ltd.
    Inventors: Steven Craig Greer, Hosang Sung
  • 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: 8964818
    Abstract: A short reach communication system includes a plurality of communication SERDES that communicate data over a short reach channel medium such as a backplane connection (e.g., PCB trace) between, for example, chips located on a common PCB. A multi-level modulated data signal is generated to transmit/receive data over the short reach channel medium. Multi-level modulated data signals, such as four-level PAM, reduce the data signal rate therefore reducing insertion loss, power, complexity of the circuits and required chip real estate.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: February 24, 2015
    Assignee: Broadcom Corporation
    Inventors: Lorenzo Longo, Vivek Telang
  • Patent number: 8928524
    Abstract: The present disclosure relates to the field of pulse compression in signal processing, and more particularly, to systems and methods for the synthesis of waveforms for suppressing sidelobes and sidebands using a combination of time and spectral control. More specifically, the present disclosure relates to a set of waveform symbols which can be used to maximize use of disaggregated grey-space spectrum, adapt to changing spectral condition, and maintain or enhance data rates relative to standard binary phase-shift keying (BPSK) under normal conditions.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: January 6, 2015
    Assignee: Technology Service Corporation
    Inventors: Carroll J. Nunn, Menachem Levitas
  • Patent number: 8923444
    Abstract: A receiver for decoding a communication signal is disclosed. The receiver includes an input port and a filter. The input port receives the communication signal from a communication medium. The communication signal comprises a sequence of symbols. Each symbol of the symbol sequence is an analog pulse that has a leading edge of exponential shape. The exponential shape has an exponential growth parameter value that has been selected from values ?0 and ?1, which are distinct positive values. For each symbol of the symbol sequence, the exponential growth parameter value for the leading edge of the symbol has been selected based on a corresponding bit from a stream of information bits. The filter receives the communication signal from the input port and filters the communication signal to obtain an output signal. The transfer function of the filter has one or more zeros at ?0.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: December 30, 2014
    Assignee: Board of Regents, The University of Texas System
    Inventor: Robert H. Flake
  • Patent number: 8923413
    Abstract: In described embodiments, data streams with irregular patterns are processed by transformations defined by recursively changing processor state, or iteration level. The data transformations are applied to an arbitrary long portion of data, instead of small portions, that are defined directly by a current processor state. Embodiments combine small parts of, for example, puncturing/repetition patterns into a pattern of bigger parts and apply these patterns of bigger parts to relatively large portions of input data.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: December 30, 2014
    Assignee: LSI Corporation
    Inventors: Yurii S. Shutkin, Ilya V. Neznanov, Andrey P. Sokolov, Pavel A. Panteleev, Elyar E. Gasanov
  • Publication number: 20140376418
    Abstract: Embodiments of this invention describe a method to reduce the effective inter carrier spacing between the sub-carriers of wireless, wired or optical transmissions and thereby increase the spectral efficiency of the communication system. Signal transmitted from multiple transmit chains are shifted in frequency at the transmitter. At the receiver a plurality of receive chains is used, the received signals are similarly shifted in frequency and used to reduce the inter carrier interference. Embodiments also describe a method for Full Duplex communication where the transmitters transmit using different frequency shifts. The receiver receives the transmitted signal and an echo of it's transmission. As the received transmission is shifted in frequency from it's transmission, it can cancel out the echo and receive the intended signal.
    Type: Application
    Filed: June 25, 2013
    Publication date: December 25, 2014
    Inventor: Raja BANERJEA
  • Patent number: 8879643
    Abstract: Low latency and computationally efficient techniques may be employed to account for errors in data such as low bit-width, oversampled data. In some aspects these techniques may be employed to mitigate audio artifacts associated with sigma-delta modulated audio data. In some aspects an error may be detected in a set of encoded data based on an outcome of a channel decoding process. Upon determining that a set of data may contain at least one error, the set of data may be replaced with another set of data that is based on one or more neighboring data sets. For example, in some aspects a set of data including at least one bit in error may be replaced with data that is generated by applying a cross-fading operation to neighboring data sets. In some aspects a given data bit may be flipped as a result of a linear prediction operation that is applied to PCM equivalent data that is associated with the given data bit and its neighboring data bits.
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: November 4, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Harinath Garudadri, Somdeb Majumdar, David Jonathan Julian, Chinnappa K. Ganapathy
  • Patent number: 8867657
    Abstract: A first transmitter transmits symbols. The leading edge of each symbol has the form Djexp{?jt}, where Dj is real, where ?j is selected from N possible values based on a current group of bits. The receiver has N filters whose transfer functions correspond respectively to the N possible values. The filter outputs are used to recover the group of bits. A second transmitter transmits an exponential symbol or a zero symbol depending on a current bit to be transmitted. The zero symbol has zero amplitude over the symbol period. The corresponding receiver applies threshold detection to estimate the transmitted bits. A third transmitter transmits a sequence of analog pulses with known interpulse time separation(s). The pulse sequence reflects from a moving object. A receiver captures the reflected pulse sequence. The interpulse separation(s) of the reflect pulse sequence is used to determine the radial velocity of the object.
    Type: Grant
    Filed: February 17, 2014
    Date of Patent: October 21, 2014
    Assignee: Board of Regents, The University of Texas System
    Inventor: Robert H. Flake
  • Patent number: 8868736
    Abstract: A method of estimating a level of severity of a network fault is provided. Performance parameters are monitored on upstream and downstream links to terminal network elements on a network to detect potential network faults. An alarm is raised with respect to a potential network fault automatically if at least one of the performance parameters as monitored crosses a preset threshold. After an alarm is raised, a level of severity is assigned to the alarm based on pre and post forward error correction (FEC) bit error rates (BER). In addition, the total number of terminal network elements that are impacted by the network fault is estimated and, when multiple alarms are raised of an equal level of severity, a higher priority is placed upon an alarm that affects service to a greatest number of terminal network elements.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: October 21, 2014
    Assignee: Motorola Mobility LLC
    Inventors: David B. Bowler, Brian M. Basile, Clarke V. Greene, Xiang He
  • Patent number: 8855187
    Abstract: A signal processing method for enhancing the dynamic range of a signal is disclosed. The method comprises: a) forming an attenuated signal from an input signal; b) filtering each of the input and the attenuated signals such that the sum of their bandwidths is less than or equal to the bandwidth of a transmission channel; c) modulating a first one of the filtered input signal and the filtered attenuated signal, whereby the filtered input signal and the filtered attenuated signal occupy respective non-overlapping frequency ranges within the bandwidth of the transmission channel; and d) combining the modulated signal with the second one of the filtered input signal and the filtered attenuated signal to form a composite output signal.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: October 7, 2014
    Assignee: NXP B.V.
    Inventor: Friedrich Reining
  • Patent number: 8848810
    Abstract: Systems and methods of data transmission are disclosed. In an embodiment, at least two transmitters are selectively activated and at least one transmitter is deactivated at a serial interface to transmit data via at least two distinct lines.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: September 30, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Chulkyul Lee, Anosh Davierwalla, George Wiley
  • 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: 8798212
    Abstract: A method and apparatus for processing feedback implemented in a wireless transmit/receive unit (WTRU) comprises estimating a channel matrix. The effective channel is calculated and a precoding matrix is selected. Feedback bits are generated and transmitted.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: August 5, 2014
    Assignee: Interdigital Technology Corporation
    Inventors: Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Patent number: 8792578
    Abstract: A signal coding technique for switching amplifiers includes quantizing the amplitude A(t) of an input signal to produce a time series Â(t) having M levels; modulating a clock signal in response to Â(t), thereby to produce a control signal; switching among at least three different power supply output levels in response to the control signal, thereby to generate an output pulse stream; and filtering the output pulse stream to produce an output signal for transmission.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: July 29, 2014
    Assignee: Alcatel Lucent
    Inventor: Dennis R. Morgan
  • Patent number: 8780932
    Abstract: A video transmission device 10 has: a packer 11 which receives a video signal, a sync signal, and a data-enable signal, and generates a plurality of packet signals by packetizing the video signal and the sync signal based on the data-enable signal and according to the number of bytes of a packet corresponding to the number of gradation bits of the video signal; an encode unit 15 which generates a plurality of encoded packet signals by encoding the plurality of packet signals; and a serializer 14 which generates a serial packet signal by parallel-serial converting the plurality of encoded packet signals. The packer 11 generates a control signal including a pulse with a pulse width corresponding to the number of bytes of the packet, and the encode unit 15 subjects a portion of the packet signals corresponding to the pulse in the control signal from the packer, to an encode process which is different from a process for the other portion.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: July 15, 2014
    Assignee: Thine Electronics, Inc.
    Inventor: Seiichi Ozawa
  • Patent number: 8774263
    Abstract: A transmitter (TX) for transmitting a pulse density modulated signal comprises means (SDM) for generating a pulse density modulated input signal (SI) and an encoder (ENC). The encoder (ENC) comprises a first input for receiving the pulse density modulated input signal (SI) and a second input for receiving additional information (AI) comprising at least one data bit. The encoder (ENC) is configured to generate a multi-bit telegram (TG) on the basis of the additional information (AI), the telegram (TG) comprising a predefined bit-sequence, and to replace an appropriate number of consecutive bits of the input signal (SI) with the telegram (TG) in order to generate an output signal (SO).
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: July 8, 2014
    Assignee: ams AGe
    Inventors: Richard Forsyth, Thomas Fröhlich, Matthias Steiner
  • Patent number: 8724694
    Abstract: A decoder pipeline may include a decoding (prior to deblocking) stage followed by a deblocking stage. A memory can be coupled to the decoder pipeline. A decoded first macroblock can be output from the decoding stage directly into the deblocking stage, bypassing the memory, if a decoded second macroblock depended on to deblock the first macroblock is already deblocked. Otherwise, the decoded first macroblock is stored in the memory until the second macroblock is deblocked and available to deblock the first macroblock.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: May 13, 2014
    Assignee: Nvidia Corporation
    Inventor: Wei Jia