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Speech-to-Text (and Text-to-Speech)

Speech-to-Text (e Text-to-Speech)

Speech-to-text (STT) converts spoken audio into written text; text-to-speech (TTS) does the reverse, generating synthetic voice from text. Together they form AI's voice interface.

Definition

Modern systems, OpenAI's Whisper for transcription, ElevenLabs and major providers' neural voices for synthesis, have reached near-human quality: they transcribe meetings with correct punctuation, recognize dozens of languages and produce natural voices with intonation and emotion.

Professional uses are immediate: automatic meeting minutes, subtitling, document dictation, voice assistants, multilingual dubbing and accessibility. Combined with an LLM, they enable entirely spoken conversations with AI, you talk, the model understands, it replies out loud.

Related terms

• Multi-modal AI
• NLP (Natural Language Processing)
• Deep Learning
• API
• Computer Vision

More in AI Fundamentals

• LLM (Large Language Model)
• Token
• Context Window
• Temperature
• AI Hallucination
• Fine-tuning
• RAG (Retrieval Augmented Generation)
• Embedding

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