Channel-wise-Gated-Res2Net

This repository provides the implementation of the paper: Channel-wise Gated Res2Net: Towards Robust Detection of Synthetic Speech Attacks (INTERSPEECH 2021). This work is an extension of our previous work (ICASSP 2021) with Codes.

The Architecture of Channel-wise Gated Res2Net

Main Results

1. The EER(%) and t-DCF of different network architectures on the ASVspoof2019 logical access.

2. The detection accuracy on each attack, given different network architectures with EER operating points. A16 and A19 are two attacks from the training set but trained with different training data. A17 is the most difficult unseen attack.

Dependencies

1. Python and packages

   This code was tested on Python 3.7 with PyTorch 1.6.0. Other packages can be installed by:

   pip install -r requirements.txt

2. Kaldi

   This work used Kaldi to extract the spectrogram acoustic feature, you need to install Kaldi before running our scripts.

Dataset

This work is conducted on the logical access of ASVspoof2019 Dataset, which can be downloaded here. It consists of attacks generated by different voice conversion and text-to-speech algorithms.

Start Your Project

This repository mainly consists of three parts: (i) feature extraction, (ii) system training and (iii) system evaluation.

Feature extraction

The conducted experiments in the paper were based on the CQT feature, while this repo provides codes for three feature extraction, i.e. Spec, LFCC and CQT. The top script for feature extraction is extract_feats.sh, where the first step (Stage 0) is to prepare dataset before feature extraction, followed by feature extraction for Spec (Stage 1), CQT (Stage 2) and LFCC (Stage 3). All features are required to be truncated by Stage 4.

Given your dataset directory in extract_feats.sh, you can run any stage (e.g. NUM) in the extract_feats.sh by

./extract_feats.sh --stage NUM

System training

This repo supports different system architectures, as configured in the conf/training_mdl directory. You can specify the modelconfig, feats, etc., in start_training_evaluation.sh, then run the codes below to train and evaluate your models.

./start_training_evaluation.sh

Remember to rename your runid in start_training_evaluation.sh to differentiate each configuration. Some well-trained models are available in the pretrained_models directory.

System evaluation

For evaluating systems, you can either use the Kaldi command compute-eer with the resulting *.eer file to compute system EER, e.g.

compute-eer NameofScoringFile.txt.eer

or use the ASVspoof2019 official script scoring/evaluate_tDCF_asvspoof19.py with the resulting *.txt file to compute both system EER and t-DCF, e.g. on the LA evalation set, you need to run

python scoring/evaluate_tDCF_asvspoof19.py scoring/la_asv_scores/ASVspoof2019.LA.asv.eval.gi.trl.scores.txt NameofScoringFile.txt

Citation

If this repo is helpful with your research or projects, please kindly star our repo and cite our paper as follows:

@article{li2021channel,
  title={Channel-wise Gated Res2Net: Towards Robust Detection of Synthetic Speech Attacks},
  author={Li, Xu and Wu, Xixin and Lu, Hui and Liu, Xunying and Meng, Helen},
  journal={Proc. Interspeech 2021},
  year={2021}
}

Contact

• Xu Li at the Chinese University of Hong Kong (xuli@se.cuhk.edu.hk, xuliustc1306@gmail.com)