公开(公告)号：US20230131573A1

公开(公告)日：2023-04-27

申请号：US17699631

申请日：2022-03-21

Applicant: AIROHA TECHNOLOGY CORP.

Inventor： Chao-Ling HSU ,  Li-Wen CHI ,  Kai-Sheng CHEN

IPC: G10K11/178

Abstract: The present invention relates to an active noise cancellation integrated circuit for stacking multiple anti-noise signals, an associated method, and an active noise cancellation headphone using the same. The method is applicable to an audio playback device with multiple ANC filtering units. The method includes: acquiring an anti-noise signal from an ANC filtering unit; generating a decoupled signal by processing the anti-noise signal with the transfer function of a physical channel and operations of other ANC filtering units; performing a signal superposition, wherein an anti-noise signal from another ANC filtering unit is superposed with the decoupled signal; and performing an audio playback based on the superposed signal and an audio signal such that noise is eliminated.

公开(公告)号：US20230054927A1

公开(公告)日：2023-02-23

申请号：US17689436

申请日：2022-03-08

Applicant: Airoha Technology Corp.

Inventor： Chao-Ling HSU ,  Li-Wen CHI

IPC: G10K11/178 ,  H04R1/10

Abstract: The invention relates to an adaptive active noise cancellation apparatus and an audio playback system using the same. The adaptive active noise cancellation apparatus shapes an error signal and a noise signal according to a shape of an ideal noise. After that, the shaped noise signal and the shaped error signal are sent into a parameter adjusting unit to perform an adaptive parameter adjustment. Thus, the adaptive noise filter unit is not only can adaptively suppress noise and minimize the error signal, but also can suppress specific frequencies that are sensitive to the human ear.