公开(公告)号：US11087213B2

公开(公告)日：2021-08-10

申请号：US16723974

申请日：2019-12-20

Applicant: SYNAPTICS INCORPORATED

Inventor： Saeed Mosayyebpour ,  Trausti Thormundsson ,  Francesco Nesta

IPC: G06N3/08 ,  G06N3/04 ,  G10L15/16 ,  G10L15/22 ,  G10L15/02 ,  G10L15/06

Abstract: A classification training system for binary and multi-class classification comprises a neural network operable to perform classification of input data, a training dataset including pre-segmented, labeled training samples, and a classification training module operable to train the neural network using the training dataset. The classification training module includes a forward pass processing module, and a backward pass processing module. The backward pass processing module is operable to determine whether a current frame is in a region of target (ROT), determine ROT information such as beginning and length of the ROT and update weights and biases using a cross-entropy cost function and One Spike Connectionist Temporal Classification (OSCTC) cost function. The backward pass module further computes a soft target value using ROT information and computes a signal output error using the soft target value and network output value.

公开(公告)号：US20210104217A1

公开(公告)日：2021-04-08

申请号：US17063656

申请日：2020-10-05

Applicant: SYNAPTICS INCORPORATED

Inventor： Wensen Liu ,  Govind Kannan ,  Jayvon Timmons ,  Trausti Thormundsson

IPC: G10K11/178 ,  G10H1/00

Abstract: Systems and methods for audio listening devices, comprise a speaker coupled to a first housing, a sound port having a first end and a second end, wherein the first end is coupled to the first housing, and the second end is configured to be inserted in an ear canal of a person such that sound waves emitted from the speaker propagates via a secondary path to the ear canal through the sound port, active noise cancellation (ANC) components configured to generate anti-noise signals through the micro-speakers to cancel external noise, and a first microphone disposed within the sound port at the second end of the sound port such that the first microphone is configured to detect the anti-noise signal that propagates through the sound port via the secondary path and the external noise that propagates via a primary path.

公开(公告)号：US10123113B2

公开(公告)日：2018-11-06

申请号：US15595854

申请日：2017-05-15

Applicant: SYNAPTICS INCORPORATED

Inventor： Francesco Nesta ,  Trausti Thormundsson ,  Willie Wu

IPC: H04R3/00 ,  G10L21/0208 ,  H04S7/00 ,  G10L21/0272 ,  G10L21/0216

Abstract: A selective audio source enhancement system includes a processor and a memory, and a pre-processing unit configured to receive audio data including a target audio signal, and to perform sub-band domain decomposition of the audio data to generate buffered outputs. In addition, the system includes a target source detection unit configured to receive the buffered outputs, and to generate a target presence probability corresponding to the target audio signal, as well as a spatial filter estimation unit configured to receive the target presence probability, and to transform frames buffered in each sub-band into a higher resolution frequency-domain. The system also includes a spectral filtering unit configured to retrieve a multichannel image of the target audio signal and noise signals associated with the target audio signal, and an audio synthesis unit configured to extract an enhanced mono signal corresponding to the target audio signal from the multichannel image.

公开(公告)号：US20180279044A1

公开(公告)日：2018-09-27

申请号：US15933347

申请日：2018-03-22

Applicant: SYNAPTICS INCORPORATED

Inventor： Trausti Thormundsson ,  Govind Kannan ,  Harry Lau ,  Mark Edward Miller

IPC: H04R3/00 ,  H04R29/00 ,  H03G3/30 ,  G10L19/00

Abstract: A system and a method provide for protecting a loudspeaker from thermal and/or mechanical failure by monitoring for over-temperature and over-power conditions. The system generates a first gain from a first speaker protection controller in response to a driving voltage and/or a driving current of a loudspeaker, and generates a second gain from a second speaker protection controller in response to the driving voltage and/or a driving current of the loudspeaker, if the temperature exceeds a thermal limit or if the power exceeds a maximum power. The system applies the second gain to an audio signal to lower the audio signal if the first speaker protection controller fails.

公开(公告)号：US20180253648A1

公开(公告)日：2018-09-06

申请号：US15909930

申请日：2018-03-01

Applicant: SYNAPTICS INCORPORATED

Inventor： Saeed Mosayyebpour Kaskari ,  Trausti Thormundsson ,  Francesco Nesta

IPC: G06N3/08 ,  G06N3/04 ,  G06K9/62

CPC classification number: G06N3/084 ,  G06K9/6256 ,  G06K9/627 ,  G06N3/04 ,  G06N3/0445 ,  G06N7/005 ,  G10L15/063 ,  G10L15/16 ,  G10L2015/025

Abstract: Classification training systems and methods include a neural network for classification of input data, a training dataset providing segmented labeled training data, and a classification training module operable to train the neural network using the training data. A forward pass processing module is operable to generate neural network outputs for the training data using weights and bias for the neural network, and a backward pass processing module is operable to update the weights and biases in a backward pass, including obtaining Region of Target (ROT) information from the training data, generate a forward-backward masking based on the ROT information, the forward-backward masking placing at least one restriction on a neural network output path, compute modified forward and backward variables based on the neural network outputs and the forward-backward masking, and update the weights and biases.

公开(公告)号：US20180232632A1

公开(公告)日：2018-08-16

申请号：US15894872

申请日：2018-02-12

Applicant: SYNAPTICS INCORPORATED

Inventor： Saeed Mosayyebpour Kaskari ,  Trausti Thormundsson ,  Francesco Nesta

IPC: G06N3/04 ,  G06N3/08

CPC classification number: G06N3/049 ,  G06N3/0445 ,  G06N3/084 ,  G10L15/063 ,  G10L15/16 ,  G10L15/22 ,  G10L2015/223

Abstract: A classification system and method for training a neural network includes receiving a stream of segmented, labeled training data having a sequence of frames, computing a stream of input features data for the sequence of frames, and generating neural network outputs for the sequence of frames in a forward pass through the training data and in accordance weights and biases. The weights and biases are updated in a backward pass through the training data, including determining Region of Target (ROT) information from the segmented, labeled training data, computing modified forward and backward variables based on the neural network outputs and the ROT information, deriving a signal error for each frame within the sequence of frames based on the modified forward and backward variables, and updating the weights and biases based on the derived signal error. An adaptive learning module is provided to improve a convergence rate of the neural network.

公开(公告)号：US10049678B2

公开(公告)日：2018-08-14

申请号：US15088073

申请日：2016-03-31

Applicant: SYNAPTICS INCORPORATED

Inventor： Francesco Nesta ,  Trausti Thormundsson

IPC: G10L19/00 ,  G10L21/00 ,  G10L19/025 ,  G10L19/26 ,  G10L19/008

Abstract: Methods for processing a multichannel audio signal that includes transient noise signals are provided. The method includes buffering the multichannel audio signal in a subband domain, and estimating the subband frames for transient noise likelihood. A probability of transient noise for the buffered subband frames is determined and a multichannel spatial filter is applied to decompose the subband frames to transient attenuated target source and noise estimation cancelled of the target source signal. A spectral filter is applied to the target source frame to enhance the target source frame and the subband frames that are determined to have a probability of the transient noise greater than a first threshold and a probability of target source less than a second threshold are muted.

公开(公告)号：US20190132679A1

公开(公告)日：2019-05-02

申请号：US16177308

申请日：2018-10-31

Applicant: SYNAPTICS INCORPORATED

Inventor： Jens Kristian Poulsen ,  Trausti Thormundsson ,  Ali Abdollahzadeh Milani ,  Mark Miller

IPC: H04R3/04 ,  G10L21/0216

Abstract: Systems and methods for low latency adaptive noise cancellation include an audio sensor to sense environmental noise and generate a noise signal, an audio processing path to receive an audio signal, process the audio signal through an interpolation filter, and generate a primary audio signal having a first sample frequency, an adaptive noise cancellation processor to receive the noise signal and generate an anti-noise signal, a direct interpolator to receive the anti-noise signal and generate an anti-noise signal having the first sample frequency, and a limiter to provide clipping to reduce a number of bits in the anti-noise signal, an adder operable to combine the primary audio signal and the anti-noise signal and generate a combined output signal, and a low latency filter to process the combined output signal.

公开(公告)号：US09886968B2

公开(公告)日：2018-02-06

申请号：US14197149

申请日：2014-03-04

Applicant: SYNAPTICS INCORPORATED

Inventor： Sahar E. Bou-Ghazale ,  Trausti Thormundsson ,  Willie B. Wu

IPC: G10L25/84 ,  G10L25/87

CPC classification number: G10L25/84

Abstract: A system for audio processing comprising an initial background statistical model system configured to generate an initial background statistical model using a predetermined sample size of audio data. A parameter computation system configured to generate parametric data for the audio data including cepstral and energy parameters. A background statistics computation system configured to generate preliminary background statistics for determining whether speech has been detected. A first speech detection system configured to determine whether speech was present in the initial sample of audio data. An adaptive background statistical model system configured to provide an adaptive background statistical model for use in continuous processing of audio data for speech detection. A parameter computation system configured to calculate cepstral parameters, energy parameters and other suitable parameters for speech detection. A speech/non-speech classification system configured to classify individual frames as speech frames or non-speech frames, based on the computed parameters and the adaptive background statistical model data. A background statistics update system configured to update the background statistical model based on detected speech and non-speech frames. A second speech detection system configured to perform speech detection processing and to generate a suitable indicator for use in processing audio data that is determined to include speech signals.

公开(公告)号：US11373667B2

公开(公告)日：2022-06-28

申请号：US15957829

申请日：2018-04-19

Applicant: SYNAPTICS INCORPORATED

Inventor： Saeed Mosayyebpour Kaskari ,  Francesco Nesta ,  Trausti Thormundsson ,  Thomas Aaron Gulliver

IPC: H04B15/00 ,  G10L21/0232 ,  G10L21/038 ,  G10L21/0208 ,  G10L25/18 ,  G10L21/00

Abstract: Systems and methods for processing an audio signal include an audio input operable to receive an input signal comprising a time-domain, single-channel audio signal, a subband analysis block operable to transform the input signal to a frequency domain input signal comprising a plurality of k-spaced under-sampled subband signals, a reverberation reduction block operable to reduce reverberation effect, including late reverberation, in the plurality of k-spaced under-sampled subband signals, a noise reduction block operable to reduce background noise from the plurality of k-spaced under-sampled subband signals, and a subband synthesis block operable to transform the subband signals to the time-domain, thereby producing an enhanced output signal.