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Síntese de fala

Ler texto em voz alta com voz natural

Fala e músicaIniciante #28
entradaTextoÁudio

O texto completo é apresentado em inglês; o título e o resumo estão traduzidos.

O QUE ESTA CAPACIDADE SIGNIFICA

Takes text and outputs audio that reads it aloud. It must handle both pronunciation — saying the right words — and prosody — where to pause and what to stress — while carrying a target speaker timbre. It runs opposite to speech recognition, and unlike voice cloning it does not need to imitate a specific person from a few samples but usually picks from preset voices.

Como é feita tecnicamente

Modern systems are mostly two-stage: an acoustic model predicts an intermediate representation such as a mel spectrogram from text, then a vocoder restores the waveform; both can be trained end to end. Discrete audio tokens with autoregressive or diffusion decoding yield more natural prosody and support zero-shot timbre imitation. On the text side, phonemisation and text normalisation handle digits, abbreviations and polyphonic characters.

Produtos representativos

6

Organizações relacionadas

Usos típicos

  • Audiobooks and news reading
  • Accessibility reading and assistive narration
  • Navigation prompts, podcasts and dubbing
  • Support and smart-device response audio

Como avaliar se funciona bem

MOS
Mean opinion score for naturalness
Intelligibility (WER)
Re-transcribing the output to measure how much is misheard
Speaker similarity
Closeness to the target timbre

Limites e dificuldades

  • Pauses and stress in long sentences sound unnatural, making whole passages feel flat
  • Numbers, proper nouns and polyphonic characters are misread, and one normalisation slip derails the sentence
  • Control over emotion and style is coarse; only a few systems let you finely set pace and mood

Conceitos por trás