公开(公告)号：WO2022246463A1

公开(公告)日：2022-11-24

申请号：PCT/US2022/072465

申请日：2022-05-20

Applicant: SONOS, INC.

Inventor： JONES, Aaron ,  BAGHERI SERESHKI, Saeed

IPC: H04R27/00 ,  G10L15/00

Abstract: Systems and methods for improved acoustic echo cancellation and convergence state detection are disclosed. An adaptive filter of a network microphone device (NMD) can be used to generate a filter output to be applied to microphone input signals for echo cancellation. The filter output can be generated using a reference signal corresponding to source audio content played back via transducers of the NMD. The adaptive filter can be updated dynamically over time based at least in part on an adaptation parameter that determines the rate of adaptation. In response to determining that a reset event has occurred, the adaptation parameter can be reset to a default value. Additionally or alternatively, in response to detecting a convergence error, the adaptation parameter can be reset to a default value.