How Voice AI Hears and Talks Back: ASR, LLM, TTS Explained

How does a voice assistant turn your spoken question into a spoken answer? Follow one common speech-to-text-to-speech pipeline, step by step: • How the microphone captures an audio stream • What voice activity detection finds and what it does not do • How automatic speech recognition produces a transcript • How a language model drafts the answer text • How text-to-speech generates a new voice waveform • How audio playback returns the answer to the listener 📌 Chapters 0:00 The question: how does a voice assistant reply? 0:20 Microphone and voice activity detection 0:41 Speech recognition: audio becomes text 1:01 Language model: writing the answer 1:21 Text-to-speech: answer becomes audio 1:43 Speaker playback: hearing the reply 2:03 Recap: the full voice AI pipeline For students, developers and anyone curious about voice assistants. This video explains one common cascaded design; some systems use direct audio models. #VoiceAI #SpeechRecognition #TextToSpeech #LLM #AIExplained