diff --git a/README.md b/README.md index 46471be..495423d 100644 --- a/README.md +++ b/README.md @@ -1,20 +1,22 @@

WhisperX

-

Whisper-Based Automatic Speech Recognition with improved timestamp accuracy using forced alignment. +

Whisper-Based Automatic Speech Recognition (ASR) with improved timestamp accuracy using forced alignment.

-

What is it

+

What is it 🔎

This repository refines the timestamps of openAI's Whisper model via forced aligment with phoneme-based ASR models (e.g. wav2vec2.0) -**Whisper** is an Automatic Speech Recognition model [developed by OpenAI](https://github.com/openai/whisper), trained on a large dataset of diverse audio. Whilst it does produces highly accurate transcriptions, the corresponding timestamps are at the utterance-level, not per word, and can be inaccurate by several seconds. +**Whisper** is an ASR model [developed by OpenAI](https://github.com/openai/whisper), trained on a large dataset of diverse audio. Whilst it does produces highly accurate transcriptions, the corresponding timestamps are at the utterance-level, not per word, and can be inaccurate by several seconds. + +**Phoneme-Based ASR** A suite of models finetuned to recognise the smallest unit of speech distinguishing one word from another, e.g. the element p in "tap". A popular example model is [wav2vec2.0](https://huggingface.co/facebook/wav2vec2-large-960h-lv60-self). **Forced Alignment** refers to the process by which orthographic transcriptions are aligned to audio recordings to automatically generate phone level segmentation. -

Setup

+

Setup ⚙️

Install this package using `pip install git+https://github.com/m-bain/whisperx.git` @@ -37,6 +39,7 @@ Using normal whisper out of the box, many transcriptions are out of sync: https://user-images.githubusercontent.com/36994049/207743923-b4f0d537-29ae-4be2-b404-bb941db73652.mov Now, using *WhisperX* with forced alignment to wav2vec2.0: + (a) refining segment timestamps https://user-images.githubusercontent.com/36994049/207744049-5c0ec593-5c68-44de-805b-b1701d6cc968.mov @@ -46,19 +49,24 @@ https://user-images.githubusercontent.com/36994049/207744049-5c0ec593-5c68-44de- https://user-images.githubusercontent.com/36994049/207744104-ff4faca1-1bb8-41c9-84fe-033f877e5276.mov -

Limitations

+

Limitations ⚠️

- Hacked this up quite quickly, there might be some errors, please raise an issue if you encounter any. - Currently only working and tested for ENGLISH language. - Whisper normalises spoken numbers e.g. "fifty seven" to arabic numerals "57". Need to perform this normalization after alignment, so the phonemes can be aligned. Currently just ignores numbers. - Assumes the initial whisper timestamps are accurate to some degree (within margin of 2 seconds, adjust if needed -- bigger margins more prone to alignment errors) -

Contact

+

Coming Soon 🗓

-Contact maxbain[at]robots.ox.ac.uk if you are using this at scale. +[ ] Incorporating word-level speaker diarization -

Acknowledgements

+[ ] Inference speedup with batch processing --OpenAI's whisper https://github.com/openai/whisper +

Contact

--PyTorch forced alignment tutorial https://pytorch.org/tutorials/intermediate/forced_alignment_with_torchaudio_tutorial.html +Contact maxbain[at]robots.ox.ac.uk non-bug related queries. + +

Acknowledgements 🙏

+ +Of course, this is mostly just a modification to [openAI's whisper](https://github.com/openai/whisper). +As well as accreditation to this [PyTorch tutorial on forced alignment](https://pytorch.org/tutorials/intermediate/forced_alignment_with_torchaudio_tutorial.html)