公开(公告)号：US11528571B1

公开(公告)日：2022-12-13

申请号：US17150599

申请日：2021-01-15

Applicant: Amazon Technologies, Inc.

Inventor： Ian Ernan Liu ,  Carlo Murgia ,  Huiqun Han ,  Zhouhui Miao

IPC: H04R29/00 ,  G10L25/21 ,  G10L25/51 ,  H04R3/00 ,  G10L15/22 ,  H04R1/40 ,  G10L25/18

Abstract: A system configured to perform microphone occlusion event detection. When a device detects a microphone occlusion event, the device will modify audio processing performed prior to speech processing, such as by disabling spatial processing and only processing audio data from a single microphone. The device detects the microphone occlusion event by determining inter-level difference (ILD) values between two microphone signals and using the ILD values as input features to a classifier. For example, when a far-end reference signal is inactive, the classifier may process a first ILD value within a high frequency band. However, when the far-end reference signal is active, the classifier may process the first ILD value and a second ILD value within a low frequency band.