公开(公告)号：US20140358552A1

公开(公告)日：2014-12-04

申请号：US13907679

申请日：2013-05-31

Applicant: Cirrus Logic, Inc.

Inventor： Jefferson L. Xu

IPC: G06F1/32 ,  G06F3/16

CPC classification number: G06F1/3215 ,  G06F1/3231 ,  G10L25/78 ,  G10L2025/783 ,  Y02D10/173

Abstract: A staged processing system may be configured to reduce power consumption during voice detection in an audio signal. A first stage may include detecting a minimal threshold of sound in an audio signal. A second stage may then be activated to apply a Teager operator to determine a signal-to-noise ratio of speech energy in an audio signal. When a minimum SNR is detected, a third stage may be activated to detect periodicity in the audio signal and identify a voice signal in the audio signal. When a voice signal is detected, a fourth stage may be activated to process the voice command.

Abstract translation: 分级处理系统可以被配置为在音频信号中的语音检测期间降低功耗。 第一级可以包括检测音频信号中的声音的最小阈值。 然后可以激活第二阶段以应用Teager操作者来确定音频信号中的语音能量的信噪比。 当检测到最小SNR时，可以激活第三级以检测音频信号中的周期性并识别音频信号中的语音信号。 当检测到语音信号时，可以激活第四级来处理语音命令。