Correcting Or Reducing Quantizing Errors Patents (Class 375/243)
  • Patent number: 10241489
    Abstract: A control device includes a diagnosis-information output circuit constituted by a condition monitoring circuit, a condition determining circuit, a condition-controlling-signal monitoring circuit, an output-information generating circuit that generates diagnosis information indicating a condition of the control device, and a condition controlling circuit that changes a signal in the control device in response to a signal for controlling the control device.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: March 26, 2019
    Assignee: FANUC Corporation
    Inventor: Tohru Nishi
  • Patent number: 10121480
    Abstract: A method for processing audio data includes determining a first common scalefactor value for representing quantized audio data in a frame. A second common scalefactor value is determined for representing the quantized audio data in the frame. A line equation common scalefactor value is determined from the first and second common scalefactor values.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: November 6, 2018
    Assignee: Intel Corporation
    Inventors: Dmitry N. Budnikov, Igor Igor Chikalov, Sergey N. Zheltov
  • Patent number: 10091516
    Abstract: Provided are a method and apparatus for encoding a video signal and a method and apparatus for decoding a video signal. The method of encoding the video signal includes: determining an optimum scaling bit depth of the video signal in consideration of a maximum bit number of an intermediate value obtained during transformation of the video signal and a maximum bit precision of the video signal; scaling the video signal according to a local shift value corresponding to a difference between the determined optimum scaling bit depth and an original bit depth of the video signal; and transforming the scaled video signal.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: October 2, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena Alshina, Yoon-mi Hong, Woo-jin Han
  • Patent number: 10075721
    Abstract: Provided are a method and apparatus for encoding a video signal and a method and apparatus for decoding a video signal. The method of encoding the video signal includes: determining an optimum scaling bit depth of the video signal in consideration of a maximum bit number of an intermediate value obtained during transformation of the video signal and a maximum bit precision of the video signal; scaling the video signal according to a local shift value corresponding to a difference between the determined optimum scaling bit depth and an original bit depth of the video signal; and transforming the scaled video signal.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: September 11, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena Alshina, Yoon-mi Hong, Woo-jin Han
  • Patent number: 10026411
    Abstract: Some embodiments describe methods, programs, and systems for speech encoding. Among other things, a received input signal representing a property of speech is quantized to generate a quantized output signal. Prior to the quantization, a version of the input signal is supplied to a first noise shaping filter having a first set of filter coefficients effective to generate a first filtered signal. Following the quantization, the quantized output signal is supplied to a second noise shaping filter having a second set of filter coefficients, thus generating a second filtered signal. A noise shaping operation is performed to control a frequency spectrum of a noise effect in the quantized output signal caused by the quantization, wherein the noise shaping operation is based on both the first and second filtered signals. Finally, the quantized output signal is transmitted in an encoded signal.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: July 17, 2018
    Assignee: SKYPE
    Inventor: Koen Bernard Vos
  • Patent number: 9973358
    Abstract: A method includes receiving a signal at a receiver device via a channel from a transmitter device and determining a frequency domain representation of the signal. The signal includes multiple modulation symbols. The method further includes detecting a first symbol of the signal and determining a time domain representation of a distortion estimate associated with the first symbol using a distortion recovery receiver (DRR) technique. The method further includes subtracting the distortion estimate from the first symbol to generate an updated estimate of the first symbol. The method further includes determining a frequency domain representation of a second symbol using a value that is based on a frequency domain representation of the distortion estimate and that is further based on a frequency domain representation of a quantized version of the updated estimate of the first symbol.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: May 15, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Ahmad Abdulrahman Mohammed, Louay Jalloul
  • Patent number: 9792923
    Abstract: A method performed in an audio decoder for reconstructing an original audio signal having a lowband portion and a highband portion is disclosed. The method includes receiving an encoded audio signal and extracting reconstruction parameters from the encoded audio signal. The method further includes decoding the encoded audio signal with a core audio decoder to obtain a decoded lowband portion and regenerating the highband portion based at least in part on a cross over frequency and the decoded lowband portion to obtain a regenerated highband portion. The method also includes creating a synthetic sinusoid with a level based at least in part on a spectral envelope value for the particular subband and a noise floor value for the particular subband and adding the synthetic sinusoid to the regenerated highband portion in the particular frequency band specified by the location information.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: October 17, 2017
    Assignee: Dolby International AB
    Inventors: Kristofer Kjoerling, Per Ekstrand, Holger Hoerich
  • Patent number: 9785531
    Abstract: Various embodiments for regulating link speed for performance enhancement and port diagnosis are provided. In response to identifying an amount of errors in a communications link above a predetermined threshold, an applicable transmission speed is selectively reduced. If errors identified at the reduced transmission speed are found to decrease, a communications port incorporating the communications link is flagged as potentially dirty, and if the errors identified at the reduced transmission speed are found to remain constant, the communications port is flagged as potentially bad.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: October 10, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Tara Astigarraga, Christopher V. Derobertis, Louie A. Dickens, Michael E. Starling, Daniel J. Winarski
  • Patent number: 9620129
    Abstract: An apparatus for coding a portion of an audio signal to obtain an encoded audio signal for the portion of the audio signal includes a transient detector for detecting whether a transient signal is located in the portion of the audio signal to obtain a transient detection result, an encoder stage for performing first and second encoding algorithms on the audio signal, the first and second encoding algorithms having differing first and second characteristics, respectively, a processor for determining which encoding algorithm results in an encoded audio signal being a better approximation to the portion of the audio signal with respect to the other encoding algorithm to obtain a quality result, and a controller for determining whether the encoded audio signal for the portion of the audio signal is to be generated by either the first or the second encoding algorithm based on the transient-detection and quality results.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: April 11, 2017
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Christian Helmrich, Guillaume Fuchs, Goran Markovic
  • Patent number: 9548057
    Abstract: An object of embodiments of the present invention is to provide an improved gain-shape VQ. This is achieved by determining a number of bits to be allocated to a gain adjustment- and shape-quantizer for a plurality of combinations of a current bit rate and a first signal property. The determined allocated number of bits to the gain adjustment- and shape quantizer should provide a better result for the given bitrate and signal property than using a single fixed allocation scheme. That can be achieved by deriving the bit allocation by using an average of optimal bit allocations for a training data set. Thus by pre-calculating a number of bits to the gain adjustment and the shape quantizers for a plurality of combinations of the bit rate and a first signal property and creating a table indicating the number of bits to be allocated to the gain adjustment- and the shape-quantizers for a plurality of combinations of the bit rate and a first signal property.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: January 17, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Erik Norvell
  • Patent number: 9298579
    Abstract: Various embodiments for regulating link speed for performance enhancement and port diagnosis are provided. In response to identifying an amount of errors in a communications link above a predetermined threshold, an applicable transmission speed is selectively reduced. The selective reduction occurs upon one of a temporary, permanent, and user-defined basis, and the selective reduction is performed using one of a manual setting adjustment and speed negotiation logic applied to the communications link. If errors identified at the reduced transmission speed are found to decrease, a communications port incorporating the communications link is flagged as potentially dirty, and if the errors identified at the reduced transmission speed are found to remain constant, the communications port is flagged as potentially bad.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: March 29, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Tara Astigarraga, Christopher V. Derobertis, Louie A. Dickens, Michael E. Starling, Daniel J. Winarski
  • Patent number: 8971420
    Abstract: A method and system for sequentially reorganizing signals received on a set of sensors, including a network of aerials or sensors, a high-precision clock, controlling a sequencer and suitable for accurately pacing the switching and acquisition times between each aerial, the sequencer is suitable for controlling an antenna switch, an the antenna switch linked to a single-channel radiofrequency receive module, an acquisition card, and a processing model.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: March 3, 2015
    Assignee: Thales
    Inventors: Loic Fuche, Anthony Bellion, Cyrille Le Meins, Jean-Pierre Friconneau, Patrice Stevens
  • Patent number: 8965773
    Abstract: A method is provided for hierarchical coding of a digital audio signal comprising, for a current frame of the input signal: a core coding, delivering a scalar quantization index for each sample of the current frame and at least one enhancement coding delivering indices of scalar quantization for each coded sample of an enhancement signal. The enhancement coding comprises a step of obtaining a filter for shaping the coding noise used to determine a target signal and in that the indices of scalar quantization of said enhancement signal are determined by minimizing the error between a set of possible values of scalar quantization and said target signal. The coding method can also comprise a shaping of the coding noise for the core bitrate coding. A coder implementing the coding method is also provided.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: February 24, 2015
    Assignee: Orange
    Inventors: Balazs Kovesi, Stéphane Ragot, Alain Le Guyader
  • Patent number: 8934521
    Abstract: A receiver circuit provides improved noise estimation processing by at least partially removing receiver frequency error bias. An initial noise estimate is compensated using an error term based on the observed receiver frequency error, and the resulting compensated noise estimate can be used to improve other signal processing in the receiver. For example, the receiver may use compensated noise estimates to generate signal quality estimates, e.g., Signal-to-Interference (SIR) estimates, having improved accuracy. Additionally, or alternatively, the receiver may use the compensated noise estimates to generate RAKE combining weights having improved noise suppression characteristics. In an exemplary embodiment, the initial noise estimate is a noise correlation matrix generated from a received reference signal, e.g., pilot symbols, and the error term is an error matrix directly generated using the observed receiver frequency error and channel estimates taken from the reference signal.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: January 13, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Anders Wallén
  • 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: 8902997
    Abstract: On a criterion to minimize the entropy of the linear prediction residual of the input signal used for calculation of the input PARCOR coefficient sequence, PARCOR coefficients with larger absolute values are quantized with higher quantization precisions so as to reduce the increase of the code amount of the linear prediction residual caused by the quantization error of the PARCOR coefficients. If the PARCOR coefficient is represented by a value formed by a predetermined number of bits, the number of effective bits from the most significant bit toward the least significant bit included in the output value increases with the absolute value of the PARCOR coefficient.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: December 2, 2014
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yutaka Kamamoto, Noboru Harada, Takehiro Moriya
  • Patent number: 8818802
    Abstract: A method for real-time data-pattern analysis. The method includes receiving and queuing at least one data-pattern analysis request by a data-pattern analysis unit controller. At least one data stream portion is also received and stored by the data-pattern analysis unit controller, each data stream portion corresponding to a received data-pattern analysis request. Next, a received data-pattern analysis request is selected by the data-pattern analysis unit controller along with a corresponding data stream portion. A data-pattern analysis is performed based on the selected data-pattern analysis request and the corresponding data stream portion, wherein the data-pattern analysis is performed by one of a plurality of data-pattern analysis units.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: August 26, 2014
    Assignee: Spansion LLC
    Inventors: Richard Fastow, Qamrul Hasan
  • 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: 8798174
    Abstract: A method in signal processing is used for quantizing likelihood quotients of binary random variables for transmitting between at least two signal processing units. Decision levels and reconstruction levels of a quantization of likelihood quotients are thereby determined by maximizing corresponding information between the binary random variables and the associated quantized likelihood quotients at a prescribed probability distribution of the likelihood quotients. A corresponding quantization device determines decision levels and reconstruction levels of a quantization of the likelihood quotients by maximizing the corresponding information between the binary variables and the associated quantized likelihood quotients at a prescribed probability density of the likelihood quotients.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: August 5, 2014
    Assignee: Vodafone Holding GmbH
    Inventor: Wolfgang Rave
  • Patent number: 8781033
    Abstract: An error correction data processing apparatus includes a noise predictive calibration circuit operable to calibrate a first set of filter coefficients based on a first data set and a second set of filter coefficients based on a second data set, and includes a first noise predictive detector operable to receive the first set of filter coefficients. The apparatus further includes a decoder operable to perform a first global iteration with the first noise predictive detector and determine a violation check count value, and a second noise predictive detector operable to receive the second set of filter coefficients if the violation check count value is less than a predetermined value or receive the first set of filter coefficients if the violation check count value is greater than the predetermined value.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: July 15, 2014
    Assignee: LSI Corporation
    Inventors: Yang Han, Shaohua Yang, Fan Zhang, Zongwang Li
  • 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: 8711952
    Abstract: An analog to digital converter with increased sub-range resolution. The device includes an analog front end that produces an analog communication signal, a digital front end that receives a digital communication signal, and an Analog to Digital Converter (ADC) that samples the analog communication signal across a full-range. The ADC includes a full-range ADC having a first quantization accuracy configured to sample the analog communication signal across the full-range and a central sub-range ADC having a second quantization accuracy greater than the first quantization accuracy and configured to sample the analog communication signal across a central sub-range of the full-range. The ADC also includes signal combining circuitry configured to process outputs of the full-range ADC and the central sub-range ADC to create the digital communication signal.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: April 29, 2014
    Assignee: Broadcom Corporation
    Inventors: Keith Findlater, Seyed A A Danesh, Jonathan Ephraim David Hurwitz
  • Patent number: 8654900
    Abstract: Provided is a wireless communication device which can improve the notification accuracy of the channel state information (CSI) without straining the feedback circuit. In this device, a channel estimator (105) uses a pilot signal input from a wireless receiver (102) to estimate the channel and obtain a plurality of path gains in each of a plurality of delay periods. Then, the channel estimator (105) outputs the plurality of path gains to a quantizer (107). The quantizer (107) quantizes the plurality of path gains in the number of notification bits corresponding to each of the plurality of delay periods based on the correspondence of the delay period and the number of notification bits input from a setting unit (106).
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: February 18, 2014
    Assignee: Panasonic Corporation
    Inventors: Shinsuke Takaoka, Katsuhiko Hiramatsu, Akihiko Nishio, Ryohei Kimura, Yoshiko Saito, Megumi Ichikawa
  • Patent number: 8649459
    Abstract: A digital baseband signal for radio frequency transmission is processed prior to performing digital-to-analog conversion. The digital baseband signal is filtered. The number of bits of the digital baseband signal is reduced to minimise the size of the digital-to-analog converter. By performing some of the bit reduction before filtering, the size of the filter circuit is reduced whilst still meeting relevant performance parameters.
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: February 11, 2014
    Assignee: Sony Corporation
    Inventors: Stuart Francis Glynn, Shinichi Tanabe
  • Patent number: 8611901
    Abstract: Techniques are provided for transmitting and receiving communications on behalf of wireless user equipment devices between a plurality of radio access point (RAP) devices and a gateway apparatus through a controller apparatus. A controller apparatus generates a plurality of first identifiers used for communications on behalf of corresponding wireless user devices between the controller apparatus and respective RAPs. Each first identifier identifies a wireless user device and a RAP to which the wireless user device is associated. The controller apparatus maps each first identifier to a corresponding one of a plurality of second identifiers for communications exchanged on behalf of the wireless user devices between the controller apparatus and a gateway apparatus in the wireless cellular communication network. The controller apparatus remaps a new first identifier to an existing second identifier when a particular wireless user device has handed over from a first RAP to a second RAP.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: December 17, 2013
    Assignee: Cisco Technology, Inc.
    Inventors: Rajesh Pazhyannur, Mark Grayson, Allaukik Abhishek, Daniel Wee, Santhalingam Balasekar, Hang Jin
  • Patent number: 8606322
    Abstract: A method and apparatus for configuring a portable first cellular base station to operate in a digital cellular telecommunications network includes: placing the first cellular base station in the digital cellular telecommunications network; detecting with a radio receiver at least one second operating cellular base station within the digital cellular telecommunications network; demodulating a first transmission of the at least one second cellular base station transmitter to obtain a first data stream; predictively modifying the first data stream to create a modified first data stream; correlating at least one periodic portion of the modified first data stream to form an enhanced data signal; decoding the enhanced data signal to obtain information including at least the location area code for the at least one second operating cellular base station and a neighbor list of neighboring cellular base station scrambling codes; and configuring the first cellular base station to have the same scrambling code as one of
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: December 10, 2013
    Assignee: Raytheon Applied Signal Technology, Inc.
    Inventor: Eric Sabol
  • Patent number: 8594226
    Abstract: The digital delta-sigma modulator includes a signal input for receiving digital samples of N bits, and a digital filter connected to the signal input. The digital filter performs addition/subtraction and integration operations according to a redundant arithmetic coding for delivering digital filtered samples. A quantizer performs a nonexact quantization operation so as to deliver digital output samples of n bits, with n being less than N. The input of the quantizer is connected within the digital filter.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: November 26, 2013
    Assignees: STMicroelectronics SA, Centre National de la Recherche Scientifique
    Inventors: Andreia Cathelin, Antoine Frappe, Andreas Kaiser
  • Patent number: 8588853
    Abstract: A method and apparatus for configuring a first cellular base station such as a femtocell to operate in a digital cellular telecommunications network includes: placing the first cellular base station in the digital cellular telecommunications network; detecting with a radio receiver at least one second operating cellular base station within the digital cellular telecommunications network; demodulating a first transmission of the at least one second cellular base station transmitter to obtain a first data stream; predictively modifying the first data stream to create a modified first data stream; correlating at least one periodic portion of the modified first data stream to form an enhanced data signal; decoding the enhanced data signal to obtain information; and configuring the first cellular base station with the information.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: November 19, 2013
    Assignee: Raytheon Applied Signal Technology, Inc.
    Inventor: Eric Sabol
  • Patent number: 8537171
    Abstract: Nonlinear compression of high precision image data (e.g., 12-bits per subpixel) conventionally calls for a large sized lookup table (LUT). A smaller sized and tunable circuit that performs compression with piecewise linear compressing segments is disclosed. The piecewise linear data compressing process is organized so that lumping together of plural ‘used’ high precision value points into one corresponding low precision data value point is avoided or at least minimized. In one embodiment, the compressed data is image defining data being processed for display on a nonconventional display screen where the piecewise linearly compressed data can be stored adjacent to other image data in a frame buffer where a composite image is assembled.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: September 17, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Michael Francis Higgins, Candice Hellen Brown Elliot
  • Patent number: 8504847
    Abstract: A data element can be encoded into multiple encoded data elements using an encoding algorithm that includes an encoding function and one or more encoder constant. The encoded data elements can be organized into multiple pillars, each having a respective pillar number. Each of the pillars is sent to a different storage unit of a distributed storage network. To recover the original data element, the encoded data elements are retrieved from storage, and the encoder constant is recovered using multiple encoded data elements. Recovering the encoder constant allows the encoding algorithm originally used to encode the data elements to be determined, and used to recover the original data element. The security of the stored data is enhanced, because an encoded data element from a single pillar is insufficient to identify the encoder constant.
    Type: Grant
    Filed: April 18, 2010
    Date of Patent: August 6, 2013
    Assignee: Cleversafe, Inc.
    Inventors: Jason K. Resch, Wesley Leggette
  • Patent number: 8489393
    Abstract: The perceived quality of a narrowband speech signal truncated from a wideband speech signal is improved by generating in a third frequency band third speech components matching first speech components in a first frequency band of the narrowband signal, and generating in a fourth frequency band fourth speech components matching second speech components in a second frequency band of the narrowband signal. A first gain factor is applied to the third speech components to generate adjusted third speech components, and a second gain factor is applied to the fourth speech components to generate adjusted fourth speech components, the gain factors being selected such that the ratios of the average powers of the adjusted third and fourth speech components to the average power of the first speech components are predetermined values.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: July 16, 2013
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Rogerio Guedes Alves, Kuan-chieh Yen, Michael Christopher Vartanian, Sameer Arun Gadre
  • Patent number: 8483291
    Abstract: An analog to digital converter with increased sub-range resolution and method for using the analog to digital converter is described herein. The device includes an analog front end that produces an analog communication signal, a digital front end that receives a digital communication signal, and an Analog to Digital Converter (ADC) that samples the analog communication signal across a full-range. The ADC includes a plurality of sub-range ADCs, each sub-range ADC measuring the analog communication signal across at least one respective sub-range of the full-range, the plurality of sub-ranges extending across the full-range, a central sub-range ADC having greater quantization accuracy than at least one other sub-range ADC. The ADC also includes signal combining circuitry operable to process outputs of the plurality of sub-range ADCs to create the digital communication signal.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: July 9, 2013
    Assignee: Broadcom Corporation
    Inventors: Keith Findlater, Seyed A A Danesh, Jonathan Ephraim David Hurwitz
  • Patent number: 8451912
    Abstract: Methods are described for configuring a quantizer to achieve improved end-to-end distortion performance when transmitting encoded source data over a noisy channel. The codebook and partitioning are selected using an iterative process of determining an updated codebook and an updated partition space, where the updated codebook is based, in part, on the average symbol error probability of the channel. Complete knowledge of the transitional probabilities of the channel is not required. Variants of the iterative process are described.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: May 28, 2013
    Assignee: Research In Motion Limited
    Inventors: En-Hui Yang, Haiquan Wang, Xiang Yu
  • Patent number: 8428124
    Abstract: A moving picture encoding apparatus divides a moving picture signal into key frames and non-key frames, encodes the key frames, predicts the non-key frames from the encoded key frames, determines an encoding rate for each non-key frame, encodes each non-key frame, and outputs an error-correcting code at the encoding rate as encoded data of the non-key frame. To determine the encoding rate, parameters related to the likelihood of prediction errors are calculated by at least two different methods for each non-key frame, the parameters are compared, one of the parameters is selected, and the encoding rate is calculated from the selected parameter. The selective use of differently calculated parameters enables an efficient encoding rate to be calculated for each non-key frame and reduces the transmission of encoded data that the decoder does not need or cannot decode.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: April 23, 2013
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Takahiro Yamasaki
  • Patent number: 8429511
    Abstract: Equipment protection of a switch matrix (SM) in a network node, which contains a number of matrix modules (M1.1-M4.4, E1.5-E4.6) is achieved by slicing an input signal into k parallel signal slices (x(0)-x(3)) with k>2; coding the k signal slices into a number of n coded signal slices (x(0)-x(5)) with n>k+1 using an error correcting code to add redundancy to said input signal; switching said n coded signal slices through the switching matrix (SM) via n distinct matrix modules; and decoding the n coded signal slices into k decoded signal slices to correct errors introduced while passing through said switch matrix. Preferably, the switch matrix (SM) contains a first number of matrix boards (MB1-MB4, EB5, EB6), each carrying a second number of matrix modules (M1.1-M4.4, E1.5-E4.6). The n coded signal slices are switched via matrix modules on n distinct matrix boards.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: April 23, 2013
    Assignee: Alcatel Lucent
    Inventors: Silvio Cucchi, Giuseppe Badalucco, Carlo Costantini, Riccardo Gemelli, Luigi Ronchetti
  • Patent number: 8406244
    Abstract: A base station apparatus includes a buffer for temporarily storing data to be transmitted to a mobile station in a data queue corresponding to the mobile station, and a controller for performing control of retransmitting data whose retransmission is requested by a mobile station by selecting the data from a data queue corresponding to the mobile station. When retransmitting data to a mobile station, if the data storage amount in a data queue corresponding to the mobile station is equal to or larger than a predetermined threshold value, the controller performs control of making the error resistance on wireless propagation higher than that of the last data transmission to the mobile station. This makes it possible to increase the retransmission data reception success probability of a mobile station, and suppress the occurrence of retransmission control by an upper layer.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: March 26, 2013
    Assignee: NEC Corporation
    Inventor: Kenki Takagi
  • Patent number: 8392194
    Abstract: A method for effecting a machine-based determination of speech intelligibility in an aircraft during flight operations includes: (a) in no particular order: (1) providing a representation of a machine-based speech evaluating signal; and (2) providing a representation of in-flight noise; (b) combining the representation of a machine-based speech evaluation signal and the representation of in-flight noise to obtain a combined noise signal; and (c) employing the combined noise signal to present the machine-based determination of speech intelligibility in an aircraft during flight operations.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: March 5, 2013
    Assignee: The Boeing Company
    Inventor: Naval Kishore Agarwal
  • Patent number: 8390885
    Abstract: Methods and systems are presented for characterizing a printer, display or other color reproduction device in which parametric and nonparametric forward color transforms are generated to construct a forward color device transform to characterize the mapping of CMYK input data to La*b* data of the device, with the parametric transform adapted to compensate for drifting performance of the color reproduction device.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: March 5, 2013
    Assignees: Palo Alto Research Center Incorporated, Xerox Corporation
    Inventors: Juan Liu, Haitham Hindi, Lalit Keshav Mestha, Kenneth J. Mihalyov
  • Patent number: 8390906
    Abstract: Methods and systems are presented for characterizing a printer, display or other color reproduction device in which a forward color transform having a parametric surface forward color transform and a nonparametric residual forward color transform is updated by adapting the parametric surface forward color transform using an input adaptation data set and a measured adaptation data set, generating a prediction data set in the second color space using the adapted parametric surface forward color transform and the nonparametric residual forward color transform, generating a prediction error data set in the second color space using the input adaptation data set and the prediction data set, generating a membrane forward color transform using the prediction error data set, and updating the forward color transform using the adapted parametric and nonparametric forward color transforms.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: March 5, 2013
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Juan Liu, Haitham Hindi
  • Publication number: 20120213298
    Abstract: Methods are described for configuring a quantizer to achieve improved end-to-end distortion performance when transmitting encoded source data over a noisy channel. The codebook and partitioning are selected using an iterative process of determining an updated codebook and an updated partition space, where the updated codebook is based, in part, on the average symbol error probability of the channel. Complete knowledge of the transitional probabilities of the channel is not required. Variants of the iterative process are described.
    Type: Application
    Filed: May 4, 2012
    Publication date: August 23, 2012
    Inventors: En-hui Yang, Haiquan Wang, Xiang Yu
  • Patent number: 8243916
    Abstract: A CODEC circuit for POTS system comprises a digital circuit for outputting a digital control signal having a first bit width, the digital control signal being indicative of a voltage to be applied to a POTS subscriber line pair. Further, the CODEC circuit comprises a noise shaper coupled to an output of the digital circuit for generating a noise-shaped control signal and a digital-to-analog converter coupled to an output of the noise shaper, the input of the digital-to-analog converter having a second bit width being larger than 1 and smaller than the first bit width.
    Type: Grant
    Filed: January 15, 2007
    Date of Patent: August 14, 2012
    Assignee: Lantiq Deutschland GmbH
    Inventors: Christian Jenkner, Gerhard Noessing, Richard Gaggl, Joachim Pichler
  • Patent number: 8199835
    Abstract: Systems and methods for adaptive signal sampling and sample quantization for resource-constrained stream processing. Exemplary embodiments include a signal sampling and signal quantization method for a data stream from a ECG sensor into a pervasive device, the method including adaptively sampling the data stream, compressing data samples from the data stream, reducing the number of samples via quantization, defining a utility function for signal reconstruction, and formulating optimization on the reconstructed signal that is jointly sampled and quantized.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: June 12, 2012
    Assignee: International Business Machines Corporation
    Inventors: Lisa Amini, Daby M. Sow, Deepak S. Turaga, Olivier Verscheure
  • Patent number: 8199858
    Abstract: The present invention provides an OOB detection circuit capable of making accurate signal determination even in the case where a characteristic fluctuation occurs in an analog circuit, thereby preventing deterioration in the yield of a product. To an amplitude determining circuit, a characteristic adjustment register for changing setting of an amplitude threshold adjustment mechanism for distinguishing a burst and a squelch from each other provided for the amplitude determining circuit is coupled. The characteristic adjustment register is controlled by a self determination circuit. An output of the amplitude determination circuit is supplied to a time determining circuit and also to the self determination circuit. On the basis of the output of the amplitude determining circuit, the self determination circuit controls the characteristic adjustment register.
    Type: Grant
    Filed: December 6, 2008
    Date of Patent: June 12, 2012
    Assignee: Renesas Electronics Corporation
    Inventors: Kazuaki Kurooka, Kenichi Shimizu
  • Patent number: 8175145
    Abstract: The invention relates to the processing of a signal that is compression encoded (COD) according to a predetermined encoding type applying a quantification operation (Q) and then decoded (DEC) so that the quantification noise is present in the decoded signal (S*). The signal processing of the invention comprises applying a quantification noise reduction (TBQ) to the decoded signal (S), preferably in the following manner: first obtaining information (INF) on the type of compression encoding, selecting a model for the reduction of the quantification noise adapted to said information by estimating the quantification noise (BQ) that the encoding may have generated; and applying to the decoded signal (S*) a processing for reducing the quantification noise (FIL) according to the selected model.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: May 8, 2012
    Assignee: France Telecom
    Inventors: Jean-Luc Garcia, Claude Marro, Balazs Kovesi
  • Patent number: 8175169
    Abstract: Methods are described for configuring a quantizer to achieve improved end-to-end distortion performance when transmitting encoded source data over a noisy channel. The codebook and partitioning are selected using an iterative process of determining an updated codebook and an updated partition space, where the updated codebook is based, in part, on the average symbol error probability of the channel. Complete knowledge of the transitional probabilities of the channel is not required. Variants of the iterative process are described.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: May 8, 2012
    Assignee: Research In Motion Limited
    Inventors: En-hui Yang, Haiquan Wang, Xiang Yu
  • Patent number: 8170885
    Abstract: Disclosed is a wideband audio signal coding/decoding device and method that may code a wideband audio signal while maintaining a low bit rate. The wideband audio signal coding device includes an enhancement layer that extracts a first spectrum parameter from an inputted wideband signal having a first bandwidth, quantizes the extracted first spectrum parameter, and converts the extracted first spectrum parameter into a second spectrum parameter; and a coding unit that extracts a narrowband signal from the inputted wideband signal and codes the narrowband signal based on the second spectrum parameter provided from the enhancement layer, wherein the narrowband signal has a second bandwidth smaller than the first bandwidth. The wideband audio signal coding/decoding device and method may code a wideband audio signal while maintaining a low bit rate.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: May 1, 2012
    Assignee: Gwangju Institute of Science and Technology
    Inventors: Hong Kook Kim, Young Han Lee
  • Patent number: 8149927
    Abstract: A method of encoding/decoding a digital signal using linear quantization by sections, and an apparatus for the same are provided. The method of encoding includes: converting a digital input signal, and removing redundant information from the digital signal; allocating a number of bits allocated to each predetermined quantized unit considering the importance of the digital signal; dividing the distribution of signal values into predetermined sections based on the predetermined quantized units, and linear quantizing data converted pin the operation of converting the digital input signal by sections; and generating a bit stream from the linear quantized data and predetermined side information. Therefore, a sound quality is improved compared to a sound quality produced by conventional linear quantizing devices and a complexity of a non-linear quantizing device is reduced.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: April 3, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Junghoe Kim, Dohyung Kim, Shihwa Lee, Sangwook Kim
  • Patent number: 8135585
    Abstract: An apparatus and method for processing an encoded signal are discussed. The method includes: if a coding type of an audio signal is a mixed signal coding type, extracting spectral data and a linear predictive coefficient from the audio signal; generating a residual signal for the linear prediction by performing an inverse frequency conversion on the spectral data; reconstructing the audio signal by performing a linear prediction coding on the linear predictive coefficient and the residual signal; and reconstructing a high frequency region signal using an extension base signal corresponding to a partial region of the reconstructed audio signal and band extension information.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: March 13, 2012
    Assignee: LG Electronics Inc.
    Inventors: Hyun Kook Lee, Sung Yong Yoon, Dong Soo Kim, Jae Hyun Lim
  • Patent number: 8130128
    Abstract: In a particular embodiment, a circuit device is disclosed that includes a data generator adapted to output a random pulse sequence having a particular spectral shape. The data generator includes a feedback loop with a transfer function, the output of which may be altered by limiter circuitry to increase stability of the data generator. The circuit device may further include, for example, a pulse edge control circuit to selectively apply a carrier suppression operation to at least one pulse-width modulated (PWM) signal in response to the random pulse sequence to produce at least one modulated PWM output signal. In such an example, the spectral energy associated with a PWM carrier of the modulated PWM output signal at a carrier frequency and associated harmonics is changed such that the modulated PWM output signal has a spectral shape defined by the particular spectral shape.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: March 6, 2012
    Assignee: Silicon Laboratores Inc.
    Inventor: Jeff D. Alderson
  • Patent number: 8098742
    Abstract: An analog/digital gain control device avoid some of the requirements associated with the nature of a closed-loop AGC circuits and which meets the remaining requirements without much difficulty uses an analog to digital conversion method that increases the number of effective ADC bits by compressing the baseband input analog signal using a logarithmic circuit. After the compressed analog signal is converted into a digital signal, a digital anti-log process or look-up table (LUT) is used to expand the digital signal back to the original linear scale. The word size of the output of the anti-log process is larger than the input word size due to the nature of the anti-log function. To reduce the word size of the digital signal an open loop normalization technique can be applied.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: January 17, 2012
    Assignee: InterDigital Technology Corporation
    Inventors: Leonid Kazakevich, Rui Yang