Chin Yong

2021002, Jan 21, 2021

Jul 19, 2019

16/516644

- Edinburgh, GB
Chin Huang Yong - Austin TX, US

G10K 11/178

An adaptive filter includes a frequency domain adaptation block that analyzes a statistic of coefficient movement in the frequency domain. The adaption block adjusts, in the frequency domain, a parameter (step size or leakage factor) that affects speed of convergence of the adaptive filter based on the analyzed statistic of filter coefficient movement. The filter includes an associated coefficient, statistic of coefficient movement, and parameter for each frequency bin. The coefficients may be complex numbers, and separate real and imaginary statistics and parameters are maintained. The statistic may be direction counts of the filter coefficient movement. The step size may be adjusted to a predetermined minimum value when the current direction of movement of the filter coefficient is different than the predominant direction and otherwise the step size is adjusted approximately proportionally to an amount of predominance by a value based on a direction count of the filter coefficient movement.

2022031, Oct 6, 2022

Mar 31, 2021

17/218322

- Edinburgh, GB
Hamid SEPEHR - London, GB
Colin CAMPBELL - Austin TX, US
Jason KULPE - Austin TX, US
Chin YONG - Austin TX, US
Pablo PESO PARADA - London, GB

Cirrus Logic International Semiconductor Ltd. - Edinburgh

G01L 5/16

A method of recording measurement data for characterizing a response of a given type of device to an applied force, the given type defining devices of that type as comprising a defined arrangement of a surface and N force sensors of the device concerned, where N≥1, each force sensor configured to output a sensor signal, wherein in the defined arrangement the N force sensors are operatively coupled to a defined input region of the surface so as to sense a force applied to that input region, the method comprising: for a specimen device of the given type, performing at least one measurement procedure, each measurement procedure comprising at least one measurement operation, each measurement operation comprising applying a defined force at a corresponding location on the input region of the device concerned and recording measurement data for that device and location based on the sensor signals of the N force sensors of that device. Also disclosed are a related computer-implemented method of generating a characterization definition for devices of the given type, a computer-implemented method of generating a configuration definition for devices of the given type for a given use case defined by a use-case definition, a method of configuring a candidate device of the given type for the given use case, and a method of assessing or calibrating a candidate device of the given type.

2014030, Oct 16, 2014

Aug 8, 2013

13/962515

- Austin TX, US
Jon D. Hendrix - Wimberley TX, US
Antonio J. Miller - Austin TX, US
Robert G. Kratsas - Austin TX, US
Jens-Peter B. Axelsson - Austin TX, US
Dayong Zhou - Austin TX, US
Yang Lu - Austin TX, US
Chin Huang Yong - Austin TX, US

Cirrus Logic, Inc. - Austin TX

H04R 3/00

381 718

In accordance with the present disclosure, an integrated circuit for implementing at least a portion of a personal audio device may include an output and a processing circuit. The output may provide an output signal to a transducer including both a source audio signal for playback to a listener and an anti-noise signal for countering the effect of ambient audio sounds in an acoustic output of the transducer. The processing circuit may implement an adaptive noise cancellation system that generates the anti-noise signal to reduce the presence of the ambient audio sounds heard by the listener by adapting, based on a presence of the source audio signal, a response of the adaptive noise cancellation system to minimize the ambient audio sounds at the acoustic output of the transducer, wherein the adaptive noise cancellation system is configured to adapt both in the presence and the absence of the source audio signal.

2013030, Nov 14, 2013

Dec 27, 2012

13/727718

Jon D. Hendrix - Wimberly TX, US
Dayong Zhou - Austin TX, US
Antonio John Miller - Austin TX, US
Chin Yong - Austin TX, US
Gautham Devendra Kamath - Austin TX, US

CIRRUS LOGIC, INC. - Austin TX

G10K 11/16

381 7111

A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate to the speaker to provide an error signal indicative of the effectiveness of the noise cancellation. A secondary path estimating adaptive filter is used to estimate the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Adaptation of adaptive filters is sequenced so that update of their coefficients does not cause instability or error in the update. A level of the source audio with respect to the ambient audio can be determined to determine whether the system may generate erroneous anti-noise and/or become unstable.

2013030, Nov 14, 2013

Dec 28, 2012

13/729141

Yang Lu - Austin TX, US
Jon D. Hendrix - Wimberly TX, US
Jeffrey Alderson - Austin TX, US
Antonio John Miller - Austin TX, US
Chin Yong - Austin TX, US
Gautham Devendra Kamath - Austin TX, US

Cirrus Logic, Inc. - Austin TX

G10K 11/16

381 7111

An adaptive noise canceling (ANC) circuit adaptively generates an anti-noise signal from a reference microphone signal that is injected into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone proximate the speaker provides an error signal. A secondary path estimating adaptive filter estimates the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Tones in the source audio, such as remote ringtones, present in downlink audio during initiation of a telephone call, are detected by a tone detector using accumulated tone persistence and non-silence hangover counting, and adaptation of the secondary path estimating adaptive filter is halted to prevent adapting to the tones. Adaptation of the adaptive filters is then sequenced so any disruption of the secondary path adaptive filter response is removed before allowing the anti-noise generating filter to adapt.

2015026, Sep 24, 2015

Jun 9, 2015

14/734321

- Austin TX, US
Jon D. Hendrix - Wimberly TX, US
Dayong Zhou - Austin TX, US
Antonio John Miller - Austin TX, US
Chin Yong - Austin TX, US
Gautham Devendra Kamath - Austin TX, US

G10K 11/178

A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate to the speaker to provide an error signal indicative of the effectiveness of the noise cancellation. A secondary path estimating adaptive filter is used to estimate the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. A level of the source audio with respect to the ambient audio is determined to determine whether the system may generate erroneous anti-noise and/or become unstable.

2016019, Jul 7, 2016

Mar 15, 2016

15/070564

- Austin TX, US
Yang Lu - Cedar Park TX, US
Jon D. Hendrix - Wimberly TX, US
Jeffrey Alderson - Austin TX, US
Antonio John Miller - Austin TX, US
Chin Yong - Austin TX, US
Gautham Devendra Kamath - Austin TX, US

G10K 11/175

An adaptive noise canceling (ANC) circuit adaptively generates an anti-noise signal from a reference microphone signal that is injected into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone proximate the speaker provides an error signal. A secondary path estimating adaptive filter estimates the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Tones in the source audio, such as remote ringtones, present in downlink audio during initiation of a telephone call, are detected by a tone detector using accumulated tone persistence and non-silence hangover counting, and adaptation of the secondary path estimating adaptive filter is halted to prevent adapting to the tones. Adaptation of the adaptive filters is then sequenced so any disruption of the secondary path adaptive filter response is removed before allowing the anti-noise generating filter to adapt.

2017013, May 11, 2017

Oct 28, 2016

15/337223

- Edinburgh, GB
Jeffrey D. ALDERSON - Austin TX, US
Chin Huang YONG - Austin TX, US
Ryan A. HELLMAN - Austin TX, US

Cirrus Logic International Semiconductor Ltd. - Edinburgh

G10K 11/178

An integrated circuit may include an output for providing an output signal to a transducer including both a source audio signal for playback to a listener and an anti-noise signal for countering the effect of ambient audio sounds in an acoustic output of the transducer, an ambient microphone input for receiving an ambient microphone signal indicative of the ambient audio sounds; an error microphone input for receiving an error microphone signal indicative of the output of the transducer and the ambient audio sounds at the transducer; and a processing circuit that implements a feedback path having a feedback response that generates a feedback anti-noise signal from the error microphone signal, wherein a signal gain of the feedback path is a function of the ambient microphone signal, and wherein the anti-noise signal comprises at least the feedback anti-noise signal.