# Reference

We borrowed a lot of code from these repos to build `model` and `engine`, thanks for these great works and the open-source community!

* [espnet](https://github.com/espnet/espnet/blob/master/LICENSE)
- Apache-2.0 License
- python/shell `utils`
- kaldi feat preprocessing
- data pipe line and `transformer`
- some tts models, like `fastspeech2` and GAN-based `vocoder`

* [wenet](https://github.com/wenet-e2e/wenet/blob/main/LICENSE)
- Apache-2.0 License
- U2 model
- Building TLG based Graph
- websocket server & client

* [kaldi](https://github.com/kaldi-asr/kaldi/blob/master/COPYING)
- Apache-2.0 License
- shell/perl/python utils.
- feature bins.
- WFST based decoding for LM integration.

* [delta](https://github.com/Delta-ML/delta/blob/master/LICENSE)
- Apache-2.0 License
- `engine` arch

* [speechbrain](https://github.com/speechbrain/speechbrain/blob/develop/LICENSE)
- Apache-2.0 License
- ECAPA-TDNN SV model
- ASR with CTC and pre-trained wav2vec2 models.


* [chainer](https://github.com/chainer/chainer/blob/master/LICENSE)
- MIT License
- Updater, Trainer, and some utils.

* [librosa](https://github.com/librosa/librosa/blob/main/LICENSE.md)
- ISC License
- Audio feature

* [ThreadPool](https://github.com/progschj/ThreadPool/blob/master/COPYING)
- zlib License
- ThreadPool

* [g2pW](https://github.com/GitYCC/g2pW/blob/master/LICENCE)
- Apache-2.0 license

*[transformers](https://github.com/huggingface/transformers)
- Apache-2.0 License
- Wav2vec2.0