LOW-POWER VOICE GATE FOR DEVICE WAKE-UP
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United States of America Patent
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Issued Date -
Dec 4, 2014
app pub date -
May 31, 2013
filing date -
May 31, 2013
priority date (Note) -
Abandoned
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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.
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