公开(公告)号：US20170256248A1

公开(公告)日：2017-09-07

申请号：US15058866

申请日：2016-03-02

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jeffrey D. Alderson ,  Jon D. Hendrix ,  Sang-Ik Terry Cho ,  Chin Huang Yong ,  John L. Melanson

IPC: G10K11/178

CPC classification number: G10K11/178 ,  G10K11/17885 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3014 ,  G10K2210/3016 ,  G10K2210/3028 ,  G10K2210/3056

Abstract: A method may include adaptively generating an anti-noise signal for countering the effects of ambient audio sounds at an acoustic output of the transducer by adapting a response of an adaptive filter that filters a reference microphone signal in conformity with an error microphone signal and the reference microphone signal to minimize the ambient audio sounds in the error microphone, generating a scaled anti-noise signal by applying a scaling factor to the anti-noise signal, further adjusting the response of the adaptive filter independent of a source audio signal by altering an input to the coefficient control block of the adaptive filter to compensate for the scaling factor, and combining the scaled anti-noise signal with the source audio signal to generate an audio signal provided to the transducer.

公开(公告)号：US09812114B2

公开(公告)日：2017-11-07

申请号：US15058866

申请日：2016-03-02

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jeffrey D. Alderson ,  Jon D. Hendrix ,  Sang-Ik Terry Cho ,  Chin Huang Yong ,  John L. Melanson

IPC: A61F11/06 ,  G10K11/16 ,  G10K11/178

CPC classification number: G10K11/178 ,  G10K11/17885 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3014 ,  G10K2210/3016 ,  G10K2210/3028 ,  G10K2210/3056

Abstract: A method may include adaptively generating an anti-noise signal for countering the effects of ambient audio sounds at an acoustic output of the transducer by adapting a response of an adaptive filter that filters a reference microphone signal in conformity with an error microphone signal and the reference microphone signal to minimize the ambient audio sounds in the error microphone, generating a scaled anti-noise signal by applying a scaling factor to the anti-noise signal, further adjusting the response of the adaptive filter independent of a source audio signal by altering an input to the coefficient control block of the adaptive filter to compensate for the scaling factor, and combining the scaled anti-noise signal with the source audio signal to generate an audio signal provided to the transducer.