Design an AI Voice Assistant

Design a conversational AI voice assistant like Alexa or Google Assistant that understands speech, processes commands, and responds naturally.

Functional Requirements

• Real-time speech-to-text transcription
• Natural language understanding and intent detection
• Text-to-speech response generation
• Multi-turn conversation support
• Smart home device integration
• Wake word detection

Non-Functional Requirements

• End-to-end latency under 500ms
• Support millions of concurrent users
• 95%+ speech recognition accuracy
• Handle diverse accents and languages
• Always-on wake word detection with low power

Questions to Consider

• How do you minimize perceived latency?
• How do you handle noisy environments?
• How do you manage on-device vs cloud processing?