公开(公告)号：US20230421951A1

公开(公告)日：2023-12-28

申请号：US17847319

申请日：2022-06-23

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Dayong ZHOU ,  Brad ZWERNEMANN ,  Kaichow LAU ,  Dana J. TAIPALE ,  John L. MELANSON

IPC: H04R3/02

CPC classification number: H04R3/02

Abstract: Circuitry for acoustic crosstalk cancellation between first and second acoustic signals, the circuitry comprising: crosstalk cancellation circuitry configured to: receive a first audio signal and, based on the received first audio signal, generate a first crosstalk cancellation signal; receive a second audio signal and, based on the received second audio signal, generate a second crosstalk cancellation signal; combine the first crosstalk cancellation signal with a signal indicative of the second audio signal to generate a first crosstalk cancellation circuitry output signal; and combine the second crosstalk cancellation signal with a signal indicative of the first audio signal to generate a second crosstalk cancellation circuitry output signal; and output stage circuitry configured to: receive the first crosstalk cancellation circuitry output signal and, based on the received first crosstalk cancellation circuitry, generate a first drive signal for driving a first speaker to generate the first acoustic signal; and receive the second crosstalk cancellation circuitry output signal and, based on the received second crosstalk cancellation circuitry, generate a second drive signal for driving a second speaker to generate the second acoustic signal, wherein a parameter of the crosstalk cancellation circuitry is variable based on one or more of: a position of a user of a host device incorporating the circuitry with respect to the host device; a volume setting of the host device; a level of the first and/or second crosstalk cancellation signal; and an operational parameter of the output stage circuitry.

公开(公告)号：US20190230438A1

公开(公告)日：2019-07-25

申请号：US16255537

申请日：2019-01-23

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Ziad HATAB ,  Jie SU ,  Kaichow LAU

IPC: H04R3/04 ,  G10L25/18 ,  G10L25/21

Abstract: A method for processing audio data for output to a transducer may include receiving an audio signal, filtering the audio signal with a fixed filter having fixed filter coefficients to generate a filtered audio signal, and outputting the filtered audio signal to the transducer. The fixed filter coefficients of the fixed filter may be tuned by using a psychoacoustic model of the transducer to determine audibility masking thresholds for a plurality of frequency sub-bands, allocating compensation coefficients to the plurality of frequency sub-bands, and fitting the fixed filter coefficients with the compensation coefficients allocated to the plurality of sub-bands.