Lecture 2 Architecture of Virtual Assistants and WWvW
[Pages:56]Stanford CS224v Course: Conversational Virtual Assistants with Deep Learning
Lecture 2
Architecture of Virtual Assistants and WWvW
? What Does an Assistant Do? ? How Alexa builds its 3rd party platform? ? How to build a platform that supports
the full expressiveness of natural language? (Everything but NLP and speech) ? Decentralized WWvW
By Monica Lam and Giovanni Campagna
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Growth of Virtual Assistants
$3B US in 2019 -> $44B US in 2027 (CAGR 38%)1
? 50 millions in 2 years ? Internet: 50 millions in 4 years
? 90M adults in the US have smart speakers
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Intelligent Virtual Assistant Market
$3B US in 2019 -> $44B US in 2027 (CAGR 38%)1 1. Smart Speakers: Alexa, Google Assistant 2. Chatbots / Robotic Process Automation
? BFIS (banks, financial institutes, insurance), Government, Hospitality, Travel, Retail, Automotive, Media & Entertainment, Education, Healthcare
1Valuates Reports
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Alexa Commands
Party 1st
Category Personification Interactive Clock Radio IoTs
Web 3rd
Examples Chit chat, FAQ Music, news, weather, clock, TVs, security camera, lights, ... Amazon services Questions: Search, Wikipedia, ... General websites
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Genie Commands
Party 1st
Category Personification Interactive Clock Radio IoTs
Web 3rd
Examples Chit chat, FAQ Music, news, weather, clock, TVs, security camera, lights, ... Amazon services Questions: Search, Wikipedia, ... General websites
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Techniques
Category
Examples
Personification Chit chat, FAQ
Clock Radio Music, news, weather, clock,
IoTs
TVs, security camera, lights,
Web
Questions: Search, Wikipedia, General websites
Technology
Chit chat, FAQ
Tasks
Tasks
Alexa: Searcn Genie: Search
+ Tasks
Alexa: Task intents Genie: Tasks
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High-Level Architecture
Speech-to-text
Text-to-speech
Dialogue Runtime
Task Intents
Tasks
Chitchat
FAQ
Web Search
Amazon specific
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Key Concepts
1. Assistant: Tasks, Chit-chat, FAQ, Open-domain questions 2. Alexa: 3rd-Party Dispatch Model 3. Genie: a Function Execution Model 4. Monitors and Function Composition 5. Abstract APIs 6. Decentralized WWvW
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