公开(公告)号：US09398374B2

公开(公告)日：2016-07-19

申请号：US14457284

申请日：2014-08-12

Applicant: Cirrus Logic, Inc.

Inventor： Khosrow Lashkari ,  Jie Su

IPC: H04B3/00 ,  H04R3/00 ,  H04R3/02

CPC classification number: H04R3/00 ,  H04M9/08 ,  H04R3/002 ,  H04R3/02

Abstract: In accordance with embodiments of the present disclosure, an audio processing circuit for use in an audio device may perform non-linear acoustic echo cancellation by predicting a displacement associated with an audio speaker, wherein such prediction takes into account a nonlinear response of the audio speaker with a mathematical model that calculates the predicted displacement of the audio speaker as a function of a current signal associated with the audio speaker using a time-varying difference equation, wherein coefficients of the difference equation are based on a set of physical parameters of the audio speaker. From the predicted displacement, the processing circuit may calculate a predicted acoustic output of the audio speaker, which may be used to generate a reference signal to an acoustic echo canceller.

Abstract translation: 根据本公开的实施例，用于音频设备的音频处理电路可以通过预测与音频扬声器相关联的位移来执行非线性声学回声消除，其中这种预测考虑了音频扬声器的非线性响应 使用数学模型，其使用时变差分方程式计算作为与音频扬声器相关联的当前信号的音频扬声器的预测位移，其中差分方程的系数基于音频的一组物理参数 扬声器。 从预测的位移，处理电路可以计算音频扬声器的预测声输出，其可以用于产生到声学回波消除器的参考信号。

公开(公告)号：US20160050489A1

公开(公告)日：2016-02-18

申请号：US14457284

申请日：2014-08-12

Applicant: Cirrus Logic, Inc.

Inventor： Khosrow Lashkari ,  Jie Su

IPC: H04R3/00

CPC classification number: H04R3/00 ,  H04M9/08 ,  H04R3/002 ,  H04R3/02

Abstract: In accordance with embodiments of the present disclosure, an audio processing circuit for use in an audio device may perform non-linear acoustic echo cancellation by predicting a displacement associated with an audio speaker, wherein such prediction takes into account a nonlinear response of the audio speaker with a mathematical model that calculates the predicted displacement of the audio speaker as a function of a current signal associated with the audio speaker using a time-varying difference equation, wherein coefficients of the difference equation are based on a set of physical parameters of the audio speaker. From the predicted displacement, the processing circuit may calculate a predicted acoustic output of the audio speaker, which may be used to generate a reference signal to an acoustic echo canceller.

Abstract translation: 根据本公开的实施例，用于音频设备的音频处理电路可以通过预测与音频扬声器相关联的位移来执行非线性声学回声消除，其中这种预测考虑了音频扬声器的非线性响应 使用数学模型，其使用时变差分方程式计算作为与音频扬声器相关联的当前信号的音频扬声器的预测位移，其中差分方程的系数基于音频的一组物理参数 扬声器。 从预测的位移，处理电路可以计算音频扬声器的预测声输出，其可以用于产生到声学回波消除器的参考信号。