公开(公告)号：US11828885B2

公开(公告)日：2023-11-28

申请号：US16219120

申请日：2018-12-13

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Pablo Peso Parada ,  Rahim Saeidi

IPC: G01S7/521 ,  G10K9/12 ,  G01S7/523 ,  H04B11/00 ,  G01N29/34 ,  G01S15/04 ,  G01S15/10 ,  G01S7/539 ,  G01S15/08 ,  G01S7/52 ,  G01S7/527

CPC classification number: G01S7/521 ,  G01N29/34 ,  G01S7/523 ,  G01S7/539 ,  G01S15/04 ,  G01S15/104 ,  G10K9/12 ,  H04B11/00 ,  G01S7/52004 ,  G01S7/527 ,  G01S15/08

Abstract: Embodiments of the present disclosure provide apparatus, methods and computer programs for ultrasonic proximity-detection. In one embodiment, processing circuitry comprises: a first input for receiving an indication of an interrogating ultrasonic signal; a second input for receiving a detected ultrasonic return signal; an adaptive filter, coupled to the first and second inputs, operative to estimate a transfer function between the interrogating ultrasonic signal and the detected ultrasonic return signal; a feature extract module, coupled to the adaptive filter, operative to calculate statistical moments of one or more of: the estimated transfer function; an estimated ultrasonic return signal, calculated based on the interrogating ultrasonic signal and the estimated transfer function; and an error signal, representing the error between the estimated ultrasonic return signal and the detected ultrasonic return signal; and a classifier module, coupled to the feature extract module, operative to determine the presence of a nearby object based on the statistical moments.

公开(公告)号：US20190187261A1

公开(公告)日：2019-06-20

申请号：US16219120

申请日：2018-12-13

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Pablo Peso Parada ,  Rahim Saeidi

IPC: G01S7/521 ,  G10K9/12 ,  G01N29/34 ,  G01S7/523 ,  H04B11/00

CPC classification number: G01S7/521 ,  G01N29/34 ,  G01S7/523 ,  G01S15/08 ,  G10K9/12 ,  H04B11/00

Abstract: Embodiments of the present disclosure provide apparatus, methods and computer programs for ultrasonic proximity-detection. In one embodiment, processing circuitry comprises: a first input for receiving an indication of an interrogating ultrasonic signal; a second input for receiving a detected ultrasonic return signal; an adaptive filter, coupled to the first and second inputs, operative to estimate a transfer function between the interrogating ultrasonic signal and the detected ultrasonic return signal; a feature extract module, coupled to the adaptive filter, operative to calculate statistical moments of one or more of: the estimated transfer function; an estimated ultrasonic return signal, calculated based on the interrogating ultrasonic signal and the estimated transfer function; and an error signal, representing the error between the estimated ultrasonic return signal and the detected ultrasonic return signal; and a classifier module, coupled to the feature extract module, operative to determine the presence of a nearby object based on the statistical moments.

公开(公告)号：US11638094B2

公开(公告)日：2023-04-25

申请号：US17057516

申请日：2019-05-29

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Pablo Peso Parada ,  Rahim Saeidi ,  John L. Melanson

IPC: H04R3/02 ,  H04M1/20 ,  G10K11/178

Abstract: A howling detector is described that is configured to receive an input signal and to determine measure of the linearity of a logarithmic representation of the energy of the input signal. In some examples, this triggers gain adjustment (e.g. of a noise control unit) and, in some further examples, the amount of the gain adjustment may be based on an estimation of the maximum stable gain of a noise control unit.

公开(公告)号：US10681458B2

公开(公告)日：2020-06-09

申请号：US16004900

申请日：2018-06-11

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Pablo Peso Parada ,  Rahim Saeidi ,  John L. Melanson

IPC: H04R3/02 ,  H04M1/20 ,  G10K11/178

Abstract: A processing module for a noise control circuit may include a howling detector configured to receive an input signal and to determine a linearity metric based on the input signal, the linearity metric comprising a measure of the linearity of a logarithmic representation of the energy of the input signal. The processing module may also include a gain adjuster configured to adjust the gain of a noise control unit.

公开(公告)号：US11107493B2

公开(公告)日：2021-08-31

申请号：US16566162

申请日：2019-09-10

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Sara Mainiero ,  Toby Stokes ,  Pablo Peso Parada ,  Rahim Saeidi

IPC: G10L25/51 ,  G10L25/18 ,  G10L25/21

Abstract: An audio processing system is described for an audio event detection (AED) system. The system includes a feature extraction block configured to derive at least one feature which represents a spectral feature of the input signal.

公开(公告)号：US10283106B1

公开(公告)日：2019-05-07

申请号：US15938614

申请日：2018-03-28

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Rahim Saeidi ,  Pablo Peso Parada

IPC: H03H17/02 ,  G10K11/178

Abstract: The present application describes techniques for noise control which utilize a feedback control unit comprising a filter, derived from one or more predetermined filter candidates, for reducing or cancelling a feedback component of a noise control signal.