公开(公告)号：US10128820B2

公开(公告)日：2018-11-13

申请号：US15817906

申请日：2017-11-20

申请人： HRL Laboratories, LLC

发明人： Peter Petre ,  Bryan H. Fong ,  Shankar R. Rao ,  Charles E. Martin

IPC分类号： H04B1/00 ,  H03H21/00 ,  G06K9/00 ,  G06K9/62 ,  H04B1/7163 ,  H04B1/719 ,  G06N3/04

摘要： Described is a cognitive signal processor for signal denoising and blind source separation. During operation, the cognitive signal processor receives a mixture signal that comprises a plurality of source signals. A denoised reservoir state signal is generated by mapping the mixture signal to a dynamic reservoir to perform signal denoising. At least one separated source signal is identified by adaptively filtering the denoised reservoir state signal.

公开(公告)号：US10089998B1

公开(公告)日：2018-10-02

申请号：US15871741

申请日：2018-01-15

申请人： Advanced Micro Devices, Inc.

发明人： A Srinivas

IPC分类号： H04R3/00 ,  G10L21/0216 ,  H04R1/40 ,  H03H21/00

摘要： An electronic device includes a plurality of microphones, each pair of microphones in the plurality of microphones being a respective distance from one another. The electronic device also includes a beamformer functional block that receives audio signals from each of the microphones. The beamformer functional block detects a dominant microphone from among the plurality of microphones based on the audio signals from each of the microphones and the distances between the microphones, the dominant microphone being in a closest direction to a source of desired audio. The beamformer functional block also detects interfering audio signals based on phase coherence between audio signals from the dominant microphone and audio signals from other microphones in the plurality of microphones. The beamformer functional block generates a beamformed audio output signal based on the audio signals and the interfering audio signals from each of the microphones.

公开(公告)号：US20180278242A1

公开(公告)日：2018-09-27

申请号：US15990050

申请日：2018-05-25

申请人： Craig S. Montgomery ,  Spence K. Purnell

发明人： Craig S. Montgomery ,  Spence K. Purnell

IPC分类号： H03H21/00 ,  G06F17/17 ,  G06F17/30 ,  G06F7/24

CPC分类号： H03H21/0012 ,  G06F7/24 ,  G06F16/24578 ,  G06F16/258 ,  G06F17/17 ,  G06Q10/00 ,  G06Q10/06 ,  G06Q30/0282

摘要： A customizable data aggregating, data sorting, and data transformation system is disclosed. In particular, the system may allow for the application of various filters to a sample of data corresponding to various measurables associated with objects. A mean and standard deviation for each of the measurables in the filtered sample of data may be calculated and may be utilized in determining z-scores for a first set of raw measurements corresponding to the measurables. Once the z-scores for the first set of raw measurements are determined, selected weights may be applied to each of the z-scores to determine a weighted z-score for each of the measurables in the first set. Each weighted z-score may then be aggregated to generate a score for an object associated with the first set. The score for the object may be utilized to rank the object relative to other objects in the filtered sample of data.

公开(公告)号：US20180262275A1

公开(公告)日：2018-09-13

申请号：US15977835

申请日：2018-05-11

申请人： Luxtera, Inc.

发明人： Brian Welch ,  Gianlorenzo Masini

IPC分类号： H04B10/69 ,  H03F3/08 ,  H03G3/30 ,  H04B10/80 ,  H03H21/00

CPC分类号： H04B10/693 ,  H03F3/085 ,  H03G3/3084 ,  H03H21/0012 ,  H04B10/80

摘要： Methods and systems for a distributed optoelectronic receiver are disclosed and may include an optoelectronic receiver having a grating coupler, a splitter, a plurality of photodiodes, and a plurality of transimpedance amplifiers (TIAs). The receiver receives a modulated optical signal utilizing the grating coupler, splits the received signal into a plurality of optical signals, generates a plurality of electrical signals from the plurality of optical signals utilizing the plurality of photodiodes, communicates the plurality of electrical signals to the plurality of TIAs, amplifies the plurality of electrical signals utilizing the plurality of TIAs, and generates an output electrical signal from coupled outputs of the plurality of TIAs. Each TIA may be configured to amplify signals in a different frequency range. One of the plurality of electrical signals may be DC coupled to a low frequency TIA of the plurality of TIAs.

公开(公告)号：US20180254053A1

公开(公告)日：2018-09-06

申请号：US15753070

申请日：2016-09-15

申请人： DOLBY LABORATORIES LICENSING CORPORATION

发明人： Dong SHI ,  Xuejing SUN

IPC分类号： G10L25/18 ,  H03H21/00 ,  H03H17/02

CPC分类号： G10L25/18 ,  G10L25/48 ,  H03H17/0227 ,  H03H17/0294 ,  H03H21/0025 ,  H03H21/0043

摘要： Example embodiments disclosed herein relate to filter coefficient updating in time domain filtering. A method of processing an audio signal is disclosed. The method includes obtaining a predetermined number of target gains for a first portion of the audio signal by analyzing the first portion of the audio signal. Each of the target gains is corresponding to a linear subband of the audio signal. The method also includes determining a filter coefficients for time domain filtering the first portion of the audio signal so as to approximate a frequency response given by the target gains. The filter coefficients are determined by iteratively selecting at least one target gain from the target gains and updating the filter coefficient based on the selected at least one target gain. Corresponding system and computer program product for processing an audio signal are also disclosed.

公开(公告)号：US09936295B2

公开(公告)日：2018-04-03

申请号：US15206421

申请日：2016-07-11

申请人： Sony Corporation

发明人： Stanislaw Gorlow ,  Mathieu Ramona ,  Francois Pachet

IPC分类号： A63H5/00 ,  H04R3/04 ,  H03H21/00

CPC分类号： H04R3/04 ,  G10H1/361 ,  G10H2210/056 ,  G10H2250/055 ,  H03H21/0029 ,  H04R2430/03

摘要： An electronic device comprising a processing unit arranged to determine an estimation signal (y(k)) based on an input signal (x(k)) and based on a non-stationary reference signal (s0(k)).

公开(公告)号：US20180027125A1

公开(公告)日：2018-01-25

申请号：US15655295

申请日：2017-07-20

申请人： Sennheiser Communications A/S

发明人： Stig PETRI ,  Svend FELDT

IPC分类号： H04M9/08 ,  G06F17/14 ,  H03H21/00

CPC分类号： H04M9/082 ,  G06F17/142 ,  G10L21/0208 ,  G10L21/0232 ,  G10L2021/02082 ,  H03H21/0027 ,  H04B3/23 ,  H04R1/1091 ,  H04R3/02 ,  H04R25/453

摘要： The invention relates to an adaptive filter unit, in particular for being used as an echo canceller, comprising a first filter input, configured to receive a first electric audio signal, indicative of a first audio signal A(t), a second filter input, configured to receive a second electric audio signal, indicative of a second audio signal B(t), a processor and a filter output. The processor is configured to calculate and provide audio estimation data X(fn, A(t1, . . . , tM(fn))) in the frequency domain; to calculate a transformed second audio signal Y(fn, B(t)), formed by a transformation of the second audio signal B(t) into the frequency domain; and to calculate a filtered audio signal by subtracting delayed audio estimation data from the transformed second audio signal, wherein the delayed audio estimation data is provided by a memory unit of the adaptive filter unit, which is arranged to provide a data exchange with the processor, and wherein the delayed audio estimation data comprises a frequency dependent time delay compared to the transformed second audio signal.

公开(公告)号：US20170337471A1

公开(公告)日：2017-11-23

申请号：US15590620

申请日：2017-05-09

申请人： NEC Laboratories America, Inc.

发明人： Asim Kadav ,  Igor Durdanovic ,  Hans Peter Graf ,  Hao Li

IPC分类号： G06N3/08 ,  G06N3/04 ,  H03H21/00 ,  G06N3/063 ,  G06N3/06

CPC分类号： G06N3/082 ,  G06F17/153 ,  G06F17/17 ,  G06K9/00771 ,  G06K9/4628 ,  G06K9/6228 ,  G06K9/627 ,  G06K9/6296 ,  G06K9/66 ,  G06K2009/00738 ,  G06N3/0427 ,  G06N3/0454 ,  G06N3/0481 ,  G06N5/045 ,  G08B13/00 ,  G08B29/186 ,  H03H2222/04

摘要： Methods and systems for pruning a convolutional neural network (CNN) include calculating a sum of weights for each filter in a layer of the CNN. The filters in the layer are sorted by respective sums of weights. A set of m filters with the smallest sums of weights is filtered to decrease a computational cost of operating the CNN. The pruned CNN is retrained to repair accuracy loss that results from pruning the filters.

公开(公告)号：US09716482B2

公开(公告)日：2017-07-25

申请号：US15130701

申请日：2016-04-15

申请人： Clover Network, Inc.

发明人： Arvind Antonio de Menezes Pereira ,  Alvin Dominguez ,  Gary Wagner

IPC分类号： H03H7/03 ,  H03H21/00 ,  H03H7/01

CPC分类号： H03H7/03 ,  H03H7/0115 ,  H03H7/0138 ,  H03H7/0153 ,  H03H7/0161 ,  H03H7/17 ,  H03H21/0001 ,  H03H2021/0098

摘要： Various methods and devices that involve tuning filters are disclosed. A disclosed method for tuning a filter comprises trimming a center frequency of the filter. The method also comprises trimming an input signal magnitude of the filter. The method also comprises measuring a performance metric of the filter after trimming the center frequency of the filter and the input signal magnitude of the filter. The method also comprises repeating the trimming steps and the measuring step until the filter is tuned for a first physical test condition. A disclosed device that includes a filter also includes first and second trimming circuits that trim the center frequency and input signal magnitude of the filter. A disclosed system includes a motor to transfer a transmitting device from a first physical test condition to a second physical test condition relative to a proximity coupling device with a filter.

公开(公告)号：US20170179932A1

公开(公告)日：2017-06-22

申请号：US14973473

申请日：2015-12-17

申请人： SILICON LABORATORIES INC.

发明人： CARL H. ALELYUNAS ,  David Anderton ,  Nicholas R. Berkner ,  Yue Zhao ,  Thomas G. Ragan

IPC分类号： H03H21/00

CPC分类号： H03H17/0294 ,  H03H17/04 ,  H03H17/0461

摘要： An apparatus includes a plurality of delay elements, a plurality of multipliers and an accumulator to form a biquad stage; and a precision logic circuit. The biquad stage includes feedback paths; at least one feedback path has an adjustable bit precision; and the precision logic is adapted to regulate the bit precision of the feedback path(s) based at least in part on at least one parameter that is associated with the biquad stage.