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The vendors at Development Kits for AVS (Alexa Voice Service) supply reference designs for Far-Field microphone technology. These reference designs have two modules.
Digital Signal Processors (DSPs) that handle the array of microphones and noise reduction, Echo Cancellation, Beamforming, and the custom wake word.
The microcontroller - such as an Android device, a Raspberry Pi, or some other microcontroller - handles the communication to an endpoint. The microcontroller controls if the analog speech is streamed to Speech-to-Text Client Libraries or to the AVS.
If using Alexa Voice Service (AVS)
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If you are using Alexa Voice Service (AVS) (which is not HIPAA-compliant today) for Orbita, Alexa notifies Orbita of intents and utterances, just as if it was an Echo Dot.
Log into developer.amazon.com and see the documentation: https://developer.amazon.com/avs/home.html#/avs/welcome
Note: When you use Alexa Voice Service (AVS)
You can control your wake word.
You can launch directly into your skill (that is, you don't need to say Launch or open).
If using Google Speech-to-Text
To be HIPAA-compliant today, you need to stream to Google Speech-to-Text. If you do not need to be HIPAA-compliant, then you can save money if by connecting to the Alexa Voice Service (AVS).
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QualComm
Amlogic
Allwinner
NXP
Intel
XMOS
Synaptics
Cirrus Logic
Microsemi AcuEdge
Synaptics
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