ALX319: It's All in the Data: The Machine Learning Behind Alexa's AI Systems - a podcast by AWS

Garbage in, garbage out. The quality of all machine learning solutions depends on the data used in training. Alexa developers are able to use advanced natural language understanding capabilities like built-in slot and intent training, entity resolution, and dialog management. This utterance data behind your skills is the most important contributor to the voice input experience. This session discusses how utterance data is processed by our systems, and what you can do as a developer to improve accuracy.  

Further episodes of AWS re:Invent 2017

Further podcasts by AWS

Website of AWS