Speaker verification using ResnetSE and ECAPA-TDNN

Introduction

In this example, we demonstrate how to use PaddleAudio to train two types of networks for speaker verification. The networks we support here are

• Resnet34 with Squeeze-and-excite block [1] to adaptively re-weight the feature maps.
• ECAPA-TDNN [2]

Requirements

Install the requirements via

# install paddleaudio
git clone https://github.com/PaddlePaddle/models.git
cd models/PaddleAudio
pip install -e .

Then clone this project,

git clone https://github.com/ranchlai/speaker-verification.git
cd speaker-verification
pip install -r requirements.txt

Pytorch models

Pytorch is supported for inference only. Install librosa, torch and torchaudio, download the checkpoint here, then run

python test_torch.py

Datasets

Training datasets

Following from this example and this example, we use the dev split VoxCeleb 1 which consists aof 1,211 speakers and the dev split of VoxCeleb 2 consisting of 5,994 speakers for training. Thus there are 7,502 speakers totally in our training set.

Please download the two datasets from the official website and unzip all audio into a folder, e.g., ./data/voxceleb/. Make sure there are 7502 subfolders with prefix id1**** under the folder. You don't need to further process the data because all data processing such as adding noise / reverberation / speed perturbation will be done on-the-fly. However, to speed up audio decoding, you can manually convert the m4a file in VoxCeleb 2 to wav file format, at the expanse of using more storage.

Finally, create a txt file that contains the list of audios for training by

cd ./data/voxceleb/
find `pwd`/ --type f > vox_files.txt

Datasets for augmentation

The following datasets are required for dataset augmentation

• Room Impulse Response and Noise Database
• MUSAN

For the RIR dataset, you must list all audio files under the folder RIRS_NOISES/simulated_rirs/ into a text file, e.g., data/rir.list and config it as rir_path in the config.yaml file.

Likewise, you have to config the the following fields in the config file for noise augmentation

muse_speech: <musan_split/speech.list> #replace with your actual path
muse_speech_srn_high: 15.0
muse_speech_srn_low: 12.0
muse_music: <musan_split/music.list> #replace with your actual path
muse_music_srn_high: 15.0
muse_music_srn_low: 5.0
muse_noise: <musan_split/noise.list> #replace with your actual path
muse_noise_srn_high: 15
muse_noise_srn_low: 5.0

Testing datasets

The testing split of VoxCeleb 1 is used for measuring the performance of speaker verification duration training and after the training completes. You will need to download the data and unzip into a folder, e.g, ./data/voxceleb/test/.

Then download the text files which list utterance pairs to compare and the true labels indicating whether the utterances come from the same speaker. There are multiple trials and we will use veri_test2.

Training

To train your model from scratch, first create a folder(workspace) by

cd egs
mkdir <your_example>
cd <your_example>
cp ../resnet/config.yaml . #Copy an example config to your workspace

Then change the config file accordingly to make sure all audio files can be correctly located(including the files used for data augmentation). Also you can change the training and model hyper-parameters to suit your need.

Finally start your training by

python ../../train.py -c config.yaml  -d gpu:0

Testing

First download the checkpoints for resnet or ecapa-tdnn,

Then prepare the test dataset as described in Testing datasets, and set the following path in the config file,

mean_std_file: ../../data/stat.pd
test_list: ../../data/veri_test2.txt
test_folder: ../../data/voxceleb1/

To compute the eer using resnet, run:

cd egs/resnet/
python ../../test.py -w <checkpoint path> -c config.yaml  -d gpu:0

which will result in eer 0.00931.

for ecapa-tdnn, run:

cd egs/ecapa-tdnn/
python ../../test.py -w <checkpoint path> -c config.yaml  -d gpu:0

which gives you eer 0.0105.

Results

We compare our results with voxceleb_trainer.

Pretrained model of voxceleb_trainer

The test list is veri_test2.txt, which can be download from here VoxCeleb1 (cleaned)

This example

Reference

[1] Hu J, Shen L, Sun G. Squeeze-and-excitation networks, Proceedings of the IEEE conference on computer vision and pattern recognition. 2018: 7132-7141

[2] Desplanques B, Thienpondt J, Demuynck K. Ecapa-tdnn: Emphasized channel attention, propagation and aggregation in tdnn based speaker verification[J]. arXiv preprint arXiv:2005.07143, 2020.