AV-HuBERT (Audio-Visual Hidden Unit BERT)

Learning Audio-Visual Speech Representation by Masked Multimodal Cluster Prediction

Robust Self-Supervised Audio-Visual Speech Recognition

Introduction

AV-HuBERT is a self-supervised representation learning framework for audio-visual speech. It achieves state-of-the-art results in lip reading, ASR and audio-visual speech recognition on the LRS3 audio-visual speech benchmark.

If you find AV-HuBERT useful in your research, please use the following BibTeX entry for citation.

@inproceedings{shi2022avhubert,
    author  = {Bowen Shi and Wei-Ning Hsu and Kushal Lakhotia and Abdelrahman Mohamed},
    title = {Learning Audio-Visual Speech Representation by Masked Multimodal Cluster Prediction},
    year = {2022}
}

@article{shi2022avsr,
    author  = {Bowen Shi and Wei-Ning Hsu and Abdelrahman Mohamed},
    title = {Robust Self-Supervised Audio-Visual Speech Recognition},
    journal = {arXiv preprint arXiv:2201.01763}
    year = {2022}
}

License

AV-HuBERT LICENSE AGREEMENT

This License Agreement (as may be amended in accordance with this License Agreement, “License”), between you (“Licensee” or “you”) and Meta Platforms, Inc. (“Meta” or “we”) applies to your use of any computer program, algorithm, source code, object code, or software that is made available by Meta under this License (“Software”) and any specifications, manuals, documentation, and other written information provided by Meta related to the Software (“Documentation”).

By using the Software, you agree to the terms of this License. If you do not agree to this License, then you do not have any rights to use the Software or Documentation (collectively, the “Software Products”), and you must immediately cease using the Software Products.

Pre-trained and fine-tuned models

Please find the checkpoints here

Installation

First, create a conda virtual environment and activate it:

conda create -n avhubert python=3.8 -y
conda activate avhubert

Then, clone this directory:

git clone https://github.com/facebookresearch/av_hubert.git
cd avhubert
git submodule init
git submodule update

Lastly, install Fairseq and the other packages:

pip install -r requirements.txt
cd fairseq
pip install --editable ./

Load a pretrained model

$ cd avhubert
$ python
>>> import fairseq
>>> import hubert_pretraining, hubert
>>> ckpt_path = "/path/to/the/checkpoint.pt"
>>> models, cfg, task = fairseq.checkpoint_utils.load_model_ensemble_and_task([ckpt_path])
>>> model = models[0]

Train a new model

Data preparation

Follow the steps in preparation to pre-process:

• LRS3 and VoxCeleb2 datasets

Follow the steps in clustering (pre-train only) to create:

• {train,valid}.km frame-aligned pseudo label files. The label_rate is the same as the feature frame rate used for clustering, which is 100Hz for MFCC features and 25Hz for AV-HuBERT features by default.

Pre-train an AV-HuBERT model

Suppose {train,valid}.tsv are saved at /path/to/data, {train,valid}.km are saved at /path/to/labels, the configuration file is saved at /path/to/conf/conf-name, and the label rate is 100Hz.

To train a model, run:

$ cd avhubert
$ fairseq-hydra-train --config-dir /path/to/conf/ --config-name conf-name \
  task.data=/path/to/data task.label_dir=/path/to/label \
  model.label_rate=100 hydra.run.dir=/path/to/experiment/pretrain/ \
  common.user_dir=`pwd`

Finetune an AV-HuBERT model with Seq2Seq

Suppose {train,valid}.tsv are saved at /path/to/data, {train,valid}.wrd are saved at /path/to/labels, the configuration file is saved at /path/to/conf/conf-name.

To fine-tune a pre-trained HuBERT model at /path/to/checkpoint, run:

$ cd avhubert
$ fairseq-hydra-train --config-dir /path/to/conf/ --config-name conf-name \
  task.data=/path/to/data task.label_dir=/path/to/label \
  task.tokenizer_bpe_model=/path/to/tokenizer model.w2v_path=/path/to/checkpoint \
  hydra.run.dir=/path/to/experiment/finetune/ common.user_dir=`pwd`

Decode an AV-HuBERT model

Suppose the test.tsv and test.wrd are the video list and transcripts of the split to be decoded, saved at /path/to/data, and the fine-tuned model is saved at /path/to/checkpoint.

Seq2Seq decoding

task.normalize needs to be consistent with the value used during fine-tuning. Decoding results will be saved at /path/to/experiment/decode/s2s/test.

$ cd avhubert
$ python -B infer_s2s.py --config-dir ./conf/ --config-name conf-name \
  dataset.gen_subset=test common_eval.path=/path/to/checkpoint \
  common_eval.results_path=/path/to/experiment/decode/s2s/test \
  override.modalities=['video'] common.user_dir=`pwd`

The command above uses the default decoding hyperparameter, which can be found in conf/s2s_decode.yaml. override.modalities can be set to ['video'] (for lip reading), or ['audio'] (for ASR) or ['audio','video'] (for audio-visual speech recognition).These parameters can be configured from the command line. For example, to search with a beam size of 20, we can append the command above with generation.beam=20. Important parameters include:

• generation.beam
• generation.lenpen

If you want to test your model under noisy environment, append the following to the above command.

+override.noise_wav=/path/to/noise override.noise_prob=1 override.noise_snr={snr}

{snr} is the signal-to-noise ratio (SNR) and /path/to/noise is a folder containing noise manifest files (/path/to/noise/{valid,test}.tsv). See preparation for setting up this folder.