Doubao ASR is ByteDance/Volcengine's large-model speech recognition service for transcribing recorded audio files into text. Built on a 2-billion-parameter audio encoder trained on massive real-world speech data, it delivers high-accuracy transcription across noisy, multi-speaker, and domain-specific recordings.
Key capabilities:
- High accuracy — ~30% lower error rate than traditional models, and 50%+ lower in vertical domains (music, tech, education, medical). Accent error rate down ~60%, noise/background-speech errors down 30–50%.
- Multilingual & dialects — Chinese plus dialects (Shanghainese, Min Nan, etc.); the 2.0 model (Doubao-Seed-ASR-2.0) adds 13 foreign languages (Japanese, Korean, German, French, …) and context-aware inference for proper nouns, names, and homophones.
- Rich text formatting — built-in automatic punctuation, inverse text normalization (numbers), semantic smoothing, and intelligent sentence segmentation — all individually toggleable.
- Long-form audio — handles files up to 5 hours.
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