公开(公告)号：US10142730B1

公开(公告)日：2018-11-27

申请号：US15714262

申请日：2017-09-25

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Nima Yousefian ,  Seth Suppappola

IPC: H04R3/00 ,  H04R3/04 ,  H04R1/40

Abstract: Noise sources may be identified as either an interference source, such as a television, or a talker source by analyzing phase information of the microphone signals. A phase delay variance may be computed from pairs of microphone signals. A profile of an interference source may be learned over time by updating a stored profile when the phase delay variance is below a threshold. The stored profile may be used to identify interference sources received by the microphones by determining a correlation between the microphone signals and the stored profile. When an interference source is detected, control parameters may be generated to control a beamformer to reduce contribution of the interference source to an output audio signal. The output audio signal may be used for speech processing, such as in a smart home device.