A new analyze-first approach to voice wakeup device architecture uses 10x less power than a digitize-first-based approach to always-on listening, and uses localized intelligence to select and send only the relevant data to the cloud.
source http://www.electronicproducts.com/Digital_ICs/Microprocessors_Microcontrollers_DSPs/Take_voice_first_to_the_edge_to_preserve_personal_privacy.aspx
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