Power-efficient voice activation
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United States of America Patent
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Sep 22, 2015
Grant Date -
Dec 19, 2013
app pub date -
Jun 15, 2012
filing date -
Jun 15, 2012
priority date (Note) -
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Abstract
A voice activation system is provided. The voice activation system includes a first stage configured to output a first activation signal if at least one energy characteristic of a received audio signal satisfies at least one threshold and a second stage configured to transition from a first state to a second state in response to the first activation signal and, when in the second state, to output a second activation signal if at least a portion of a profile of the audio signal substantially matches at least one predetermined profile.
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