公开(公告)号：US20180330745A1

公开(公告)日：2018-11-15

申请号：US15595168

申请日：2017-05-15

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Samuel P. EBENEZER ,  Rachid KERKOUD

IPC: G10L21/0264 ,  H04R3/00 ,  G10L19/005 ,  G10L21/0208 ,  H04R1/10

CPC classification number: G10L21/0264 ,  G10L19/005 ,  G10L21/0208 ,  G10L25/78 ,  G10L2021/02165 ,  G10L2021/02166 ,  H04R1/1083 ,  H04R1/406 ,  H04R3/005 ,  H04R2201/40 ,  H04R2430/23 ,  H04R2460/01

Abstract: In accordance with embodiments of the present disclosure, a method for voice processing in an audio device having an array of a plurality of microphones wherein the array is capable of having a plurality of positional orientations relative to a user of the array, is provided. The method may include periodically computing a plurality of normalized cross-correlation functions, each cross-correlation function corresponding to a possible orientation of the array with respect to a desired source of speech, determining an orientation of the array relative to the desired source based on the plurality of normalized cross-correlation functions, detecting changes in the orientation based on the plurality of normalized cross-correlation functions, and responsive to a change in the orientation, dynamically modifying voice processing parameters of the audio device such that speech from the desired source is preserved while reducing interfering sounds.

公开(公告)号：US20240134325A1

公开(公告)日：2024-04-25

申请号：US18308420

申请日：2023-04-27

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Samuel P. EBENEZER ,  Eric J. KING ,  Emmanuel A. MARCHAIS ,  Jon D. HENDRIX ,  Mohamed SABET

IPC: G05B13/04 ,  G01R31/367

CPC classification number: G05B13/042 ,  G01R31/367

Abstract: A method for intelligently generating a stimulus for use in characterization of parameters of a model of a battery may include dynamically analyzing a current drawn from the battery by a load, based on analysis of the current, determining a sink current for augmenting the current drawn by the load, and generating the sink current based on a determined need to update the parameters.

公开(公告)号：US20220036914A1

公开(公告)日：2022-02-03

申请号：US17502265

申请日：2021-10-15

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Samuel P. EBENEZER ,  William E. SHERWOOD

IPC: G10L25/51 ,  G10L25/18 ,  H04R3/04 ,  G06F21/32

Abstract: A method for generating an acoustic stimulus for use in an ear biometric process on a user, the method comprising: receiving an indication of stimulation frequencies for use in the ear biometric process; grouping the stimulation frequencies into bands of a psychoacoustic scale; generating the acoustic stimulus, the acoustic stimulus comprising a masked bandpass component within each band of the psychoacoustic scale that comprises one or more of the stimulation frequencies.

公开(公告)号：US20180330747A1

公开(公告)日：2018-11-15

申请号：US15594347

申请日：2017-05-12

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Samuel P. EBENEZER

IPC: G10L25/06 ,  H04R3/00 ,  G10L21/0264 ,  G10L21/0216 ,  G10L15/20

CPC classification number: G10L25/06 ,  G01S3/8006 ,  G01S3/805 ,  G10L15/20 ,  G10L21/0216 ,  G10L21/0264 ,  G10L25/84 ,  G10L2021/02166 ,  H04R3/005 ,  H04R2430/20

Abstract: In accordance with embodiments of the present disclosure, a method for detecting near-field sources in an audio device may include computing a normalized cross correlation function between a first microphone signal and a second microphone signal, computing normalized auto correlation functions of each of the first microphone signal and the second microphone signal, partitioning the normalized cross correlation function and the normalized auto correlation functions into a plurality of time lag regions, computing for each respective time lag region of the plurality of the time lag regions a respective maximum deviation between the normalized cross correlation function and a normalized auto correlation function within the respective time lag region, combining the respective maximum deviations from the plurality of time lag regions to derive multiple detection statistics, and comparing each detection statistic of the multiple detection statistics to a respective threshold to detect a near-field signal.

公开(公告)号：US20240136930A1

公开(公告)日：2024-04-25

申请号：US18455253

申请日：2023-08-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Samuel P. EBENEZER ,  Emmanuel A. MARCHAIS ,  Eric J. KING ,  John L. MELANSON

IPC: H02M3/158 ,  G01R31/374 ,  G01R31/3842

CPC classification number: H02M3/1582 ,  G01R31/374 ,  G01R31/3842

Abstract: A method for intelligently generating a stimulus for use in characterization of parameters of a model of a battery may include dynamically analyzing a current drawn from the battery by a load, based on analysis of the current, determining an augmented current for augmenting the current drawn by the load, and generating the augmented current based on a determined need to update the parameters.

公开(公告)号：US20240133957A1

公开(公告)日：2024-04-25

申请号：US18308449

申请日：2023-04-27

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Samuel P. EBENEZER ,  Emmanuel A. MARCHAIS ,  Eric J. KING

IPC: G01R31/367 ,  G01R31/3842 ,  G01R31/389

CPC classification number: G01R31/367 ,  G01R31/3842 ,  G01R31/389

Abstract: A method for estimating equivalent circuit model parameters of a battery may include measuring a battery voltage across terminals of the battery and a battery current drawn from the battery, decomposing the battery voltage and the battery current into a plurality of sub-bands, each sub-band of the plurality of sub-bands based on a time constant that characterizes a temporal behavior of the battery, for each sub-band of the plurality of sub-bands, estimating an equivalent resistance for such sub-band based on a spectral content of the battery voltage and battery current for such sub-band, and estimating an open circuit voltage of the battery based at least on the spectral content of the battery voltage and battery current present in one of the plurality of sub-bands and the equivalent resistances of the plurality of sub-bands.

公开(公告)号：US20230315823A1

公开(公告)日：2023-10-05

申请号：US17706982

申请日：2022-03-29

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Samuel P. EBENEZER

IPC: G06F21/32 ,  G10K11/178 ,  G10L25/51 ,  A61B5/12 ,  A61B5/117

CPC classification number: G06F21/32 ,  G10K11/17854 ,  G10L25/51 ,  G10K11/17825 ,  G10K11/17817 ,  A61B5/12 ,  A61B5/117 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3035

Abstract: A method of identifying a system, the method comprising: obtaining an indication of background noise present at the system; generating a probe signal based on the indication; applying the probe signal to the system; estimating a response of the system to the probe signal; and identifying the system based on the measured response and the probe signal, wherein the probe signal comprises a whitening component configured to whiten noise in the estimated response due to the background noise present at the system.