公开(公告)号：US11329620B2

公开(公告)日：2022-05-10

申请号：US16928444

申请日：2020-07-14

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Johann G. Gaboriau ,  David M. Olivenbaum ,  Xiaofan Fei ,  Amar Vellanki ,  Venugopal Choukinishi ,  Gautham Sivasankar ,  Wai-Shun Shum

IPC: H03G3/30 ,  H03F3/21 ,  H03F3/217

Abstract: A method for calibrating gain in a multi-path subsystem having a first processing path, a second processing path, and a mixed signal return path, may include low-pass filtering an input signal and a mixed signal return path signal generated from the input signal at subsonic frequencies to generate a filtered input signal and a filtered mixed signal return path signal and tracking and correcting for a gain difference between the first processing path and the second processing path based on the filtered input signal and the filtered mixed signal return path signal.

公开(公告)号：US12039964B2

公开(公告)日：2024-07-16

申请号：US17540376

申请日：2021-12-02

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD.

Inventor： Ku He ,  Venugopal Choukinishi ,  Kemal S. Demirci ,  David M. Olivenbaum ,  Amar Vellanki ,  Xin Zhao ,  Wai-Shun Shum ,  Xiaofan Fei

IPC: G10K11/175 ,  H03F1/32 ,  H03F3/185 ,  H03G3/30 ,  G10K11/178 ,  H04R3/00

CPC classification number: G10K11/1752 ,  H03F1/3264 ,  H03F3/185 ,  H03G3/3005 ,  G10K11/178 ,  H03F2200/03 ,  H04R3/005

Abstract: An audio processing system reduces perception of audible artifacts due to changes in an element in an audio channel of the audio processing system. The system reproduces an audio input signal and produces an audio output signal with the audio channel. The channel has an adjustable or selectable element that, responsive to a control signal, changes a characteristic of the audio processing channel, which generates a transient in the audio output signal. The systems include a level detector for measuring a signal level of the audio input signal and a controller responsive to an output of the level detector to determine a masking time interval available from the audio output signal due to signal content in the audio input signal. The controller generates the control signal to change the characteristic of the audio processing channel so that at least a portion of the transient occurs in the masking time interval.

公开(公告)号：US20220284877A1

公开(公告)日：2022-09-08

申请号：US17540376

申请日：2021-12-02

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD.

Inventor： Ku He ,  Venugopal Choukinishi ,  Kemal S. Demirci ,  David M. Olivenbaum ,  Amar Vellanki ,  Xin Zhao ,  Wai-Shun Shum ,  Xiaofan Fei

IPC: G10K11/178 ,  H04R3/00

Abstract: An audio processing system reduces perception of audible artifacts due to changes in an element in an audio channel of the audio processing system. The system reproduces an audio input signal and produces an audio output signal with the audio channel. The channel has an adjustable or selectable element that, responsive to a control signal, changes a characteristic of the audio processing channel, which generates a transient in the audio output signal. The systems include a level detector for measuring a signal level of the audio input signal and a controller responsive to an output of the level detector to determine a masking time interval available from the audio output signal due to signal content in the audio input signal. The controller generates the control signal to change the characteristic of the audio processing channel so that at least a portion of the transient occurs in the masking time interval.