公开(公告)号：US10152960B2

公开(公告)日：2018-12-11

申请号：US15053792

申请日：2016-02-25

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jon D. Hendrix ,  Nitin Kwatra ,  Jeffrey D. Alderson

IPC: G10K11/16 ,  G10K11/178 ,  H04R1/10 ,  H04M1/60

Abstract: An integrated circuit may include an output for providing a signal to a transducer including both source audio for playback to a listener and an anti-noise signal for countering the effects of ambient audio sounds in an acoustic output of the transducer, a microphone input for receiving a microphone signal indicative of ambient sounds at the transducer, a link control input for receiving link control information of a communications link coupling the integrated circuit to the transducer and/or a microphone for generating the microphone signal, wherein the link control information includes a link quality metric of the communications link, and a processing circuit comprising a filter having a response that generates the anti-noise signal in conformity with the microphone signal to minimize the ambient sounds at the acoustic output of the transducer, wherein the processing circuit modifies generation of the anti-noise signal responsive to the link quality metric.

公开(公告)号：US10013966B2

公开(公告)日：2018-07-03

申请号：US15070457

申请日：2016-03-15

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Nitin Kwatra ,  Jon D. Hendrix ,  John L. Melanson

IPC: G10K11/178 ,  H04R3/12

CPC classification number: G10K11/178 ,  G10K11/17879 ,  G10K11/17885 ,  G10K2210/1081 ,  H04R3/12 ,  H04R2205/022

Abstract: In accordance with embodiments of the present disclosure, a processing circuit may implement an adaptive filter, a first signal injection portion which injects a first additional signal into a first frequency range content source audio signal, and a second signal injection portion which injects a second additional signal into a second frequency range content source audio signal, wherein the first additional signal and the second additional signal are substantially different. The adaptive filter may have a response that generates the antinoise signal from the reference microphone signal to reduce the presence of the ambient audio sounds at the acoustic output, wherein the response of the adaptive filter is shaped in conformity with the reference microphone signal and the error microphone signal by adapting the response of the adaptive filter to minimize the ambient audio sounds in the error microphone signal, wherein the antinoise signal is combined with at least the first frequency range content source audio signal.