We’ve skilled and are open-sourcing a neural web referred to as Whisper that approaches human stage robustness and accuracy on English speech recognition.
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Whisper is an automated speech recognition (ASR) system skilled on 680,000 hours of multilingual and multitask supervised knowledge collected from the net. We present that using such a big and numerous dataset results in improved robustness to accents, background noise and technical language. Furthermore, it permits transcription in a number of languages, in addition to translation from these languages into English. We’re open-sourcing fashions and inference code to function a basis for constructing helpful purposes and for additional analysis on strong speech processing.
The Whisper structure is an easy end-to-end method, carried out as an encoder-decoder Transformer. Enter audio is break up into 30-second chunks, transformed right into a log-Mel spectrogram, after which handed into an encoder. A decoder is skilled to foretell the corresponding textual content caption, intermixed with particular tokens that direct the one mannequin to carry out duties reminiscent of language identification, phrase-level timestamps, multilingual speech transcription, and to-English speech translation.
Different current approaches regularly use smaller, extra intently paired audio-text coaching datasets, or use broad however unsupervised audio pretraining. As a result of Whisper was skilled on a big and numerous dataset and was not fine-tuned to any particular one, it doesn’t beat fashions focusing on LibriSpeech efficiency, a famously aggressive benchmark in speech recognition. Nonetheless, after we measure Whisper’s zero-shot efficiency throughout many numerous datasets we discover it’s far more strong and makes 50% fewer errors than these fashions.
A few third of Whisper’s audio dataset is non-English, and it’s alternately given the duty of transcribing within the unique language or translating to English. We discover this method is especially efficient at studying speech to textual content translation and outperforms the supervised SOTA on CoVoST2 to English translation zero-shot.
We hope Whisper’s excessive accuracy and ease of use will permit builders so as to add voice interfaces to a a lot wider set of purposes. Try the paper, mannequin card, and code to be taught extra particulars and to check out Whisper.
