Athena
Athena is an open-source implementation of end-to-end speech processing engine. Our vision is to empower both industrial application and academic research on end-to-end models for speech processing. To make speech processing available to everyone, we're also releasing example implementation and recipe on some opensource dataset for various tasks (Automatic Speech Recognition, Speech Synthesis, Voice activity detection, Wake Word Spotting, etc).
All of our models are implemented in Tensorflow>=2.0.1. For ease of use, we provide Kaldi-free pythonic feature extractor with Athena_transform.
Key Features
- Hybrid Attention/CTC based end-to-end and streaming methods(ASR)
- Text-to-Speech(FastSpeech/FastSpeech2/Transformer)
- Voice activity detection(VAD)
- Key Word Spotting with end-to-end and streaming methods(KWS)
- ASR Unsupervised pre-training(MPC)
- Multi-GPU training on one machine or across multiple machines with Horovod
- WFST creation and WFST-based decoding with C++
- Deployment with Tensorflow C++(Local server)
Versions
- Athena v2.0(latest, current master version)
- Athena v1.0
What's new
- 2022/06/01 The Athena-model-zoo is built.
- 2022/05/13 The runtime supports C++ decoding(E2E, Streaming, WFST, PrefixBeamSearch, etc) and Deployment
- 2022/05/10 The functions about adding noise and rir aecres to clean noise are added to the transform
- 2022/04/25 The functions about KWS are added to Athena-v2.0
- 2022/04/07 The AV-Cransformer for ASR and MISP2021 task2 example are added to Athena-v2.0
- 2022/04/05 The Transformer-U2 and examples are added to Athena-v2.0
- 2022/03/20 The CTC alignment function is add to Athena-v2.0
- 2022/03/10 Vad function and examples are add to Athena-v2.0
- 2022/03/09 The Fastspeech2 is added to Athena-v2.0
- 2022/03/02 Add speaker embedding to Athena-v2.0
- 2021/11/27 The Conformer-CTC is added to Athena-v2.0
- 2021/10/31 ASR Performances updates of these E2E ASR examples(AISHELL-1, HKUST, GigaSpeech, LibriSpeech)
- 2021/09/01 The Beamsearch and Attention rescoring are updated
- 2021/08/18 The Batchbins function is added to Athena-v2.0
- 2021/06/01 Language model updates and add Transformer model structure
- 2021/05/19 The parameters of Horovod are adjusted to speed up the training
- 2021/05/07 These training parameters of E2E ASR models are adjusted
- 2021/04/09 SpecAugment bug is fixed
Discussion & Communication
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1) Table of Contents
2) Installation
Athena can be installed based on Tensorflow2.3 and Tensorflow2.8 successfully.
- Athena-v2.0 installed based on Tensorflow2.3:
pip install tensorflow-gpu==2.3.0
pip install -r requirements.txt
python setup.py bdist_wheel sdist
python -m pip install --ignore-installed dist/athena-2.0*.whl- Athena-v2.0 installed based on Tensorflow2.8:
pip install tensorflow-gpu==2.8.0
pip install -r requirements.txt
python setup.tf2.8.py bdist_wheel sdist
python -m pip install --ignore-installed dist/athena-2.0*.whl3) Results
3.1) ASR
The performances of a part of models are shown as follow:
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| Model | LM | HKUST | AISHELL1 Dataset | LibriSpeech Dataset | Giga | MISP | Model link | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CER% | CER% | WER% | WER% | CER% | ||||||||
| dev | dev | test | dev _clean | dev _other | test_ clean | test_ other | dev | test | - | |||
| transformer | w | 21.64 | - | 5.13 | - | - | - | - | - | 11.70 | - | |
| w/o | 21.87 | - | 5.22 | 3.84 | - | 3.96 | 9.70 | - | - | - | ||
| transformer-u2 | w | - | - | - | - | - | - | - | - | - | - | |
| w/o | - | - | 6.38 | - | - | - | - | - | - | - | ||
| conformer | w | 21.33 | - | 4.95 | - | - | - | - | - | - | 50.50 | |
| w/o | 21.59 | - | 5.04 | - | - | - | - | - | - | - | ||
| conformer-u2 | w | - | - | - | - | - | - | - | - | - | - | |
| w/o | - | - | 6.29 | - | - | - | - | - | - | - | ||
| conformer-CTC | w | - | - | - | - | - | - | - | - | - | - | |
| w/o | - | - | 6.60 | - | - | - | - | - | - | - |
To compare with other published results, see wer_are_we.md.
More details of U2, see ASR readme
3.2) TTS
Currently supported TTS tasks are LJSpeech and Chinese Standard Mandarin Speech Copus(data_baker). Supported models are shown in the table below: (Note:HiFiGAN is trained based on TensorflowTTS)
The performance of Athena-TTS are shown as follow:
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| Traing Data | Acoustic Model | Vocoder | Audio Demo |
|---|---|---|---|
| data_baker | Tacotron2 | GL | audio_demo |
| data_baker | Transformer_tts | GL | audio_demo |
| data_baker | Fastspeech | GL | audio_demo |
| data_baker | Fastspeech2 | GL | audio_demo |
| data_baker | Fastspeech2 | HiFiGAN | audio_demo |
| ljspeech | Tacotron2 | GL | audio_demo |
More details see TTS readme
3.3) VAD
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| Task | Model Name | Training Data | Input Segment | Frame Error Rate |
|---|---|---|---|---|
| VAD | DNN | Google Speech Commands Dataset V2 | 0.21s | 8.49% |
| VAD | MarbleNet | Google Speech Commands Dataset V2 | 0.63s | 2.50% |
More details see VAD readme
3.4) KWS
The performances on MISP2021 task1 dataset are shown as follow:
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| KWS Type | Model | Model Detail | Data | Loss | Dev | Eval |
|---|---|---|---|---|---|---|
| Streaming | CNN-DNN | 2 Conv+3 Dense | 60h pos+200h neg | CE | 0.314 | / |
| E2E | CRNN | 2 Conv+2 biGRU | 60h pos+200h neg | CE | 0.209 | / |
| E2E | CRNN | Conv+5 biLSTM | 60h pos+200h neg | CE | 0.186 | / |
| E2E | CRNN | Conv+5 biLSTM | 170h pos+530h neg | CE | 0.178 | / |
| E2E | A-Transformer | Conv+4 encoders+1 Dense | 170h pos+530h neg | CE&Focal | 0.109 | 0.106 |
| E2E | A-Conformer | Conv+4 encoders+1 Dense | 170h pos+530h neg | CE&Focal | 0.105 | 0.116 |
| E2E | AV-Transformer | 2 Conv+4 AV-encoders+1Dense | A(170h pos+530h neg)+V(Far 124h) | CE | 0.132 | / |
More details you can see: KWS readme
3.5) CTC-Alignment
The CTC alignment result of one utterance is shown below, we can see the output of ctc alignment is with time delayed:
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More details see: Alignment readme
3.6) Deploy
Athena-V2.0 deployment only support the ASR. All the experiments are conducted on a CPU machine with 2.10GHz and 104 logic cores. We evaluate the performance on AIShell datasets. The results are shown as follow:
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| Logic Core | Decoder Type | Beamsize | RTF | Character Accuracy |
|---|---|---|---|---|
| 1 | BeamSearch | 1 | 0.0881 | 92.65% |
| 10 | 0.2534 | 93.07% | ||
| 20 | 0.4537 | 93.06% | ||
| 10 | 1 | 0.04792 | 92.65% | |
| 10 | 0.1135 | 93.07% | ||
| 20 | 0.1746 | 93.06% | ||
| 1 | CTC Prefix BeamSearch | 1 | 0.0543 | 93.60% |
| 10 | 0.06 | 93.60% | ||
| 20 | 0.0903 | 93.60% | ||
| 10 | 1 | 0.0283 | 93.60% | |
| 10 | 0.038 | 93.60% | ||
| 20 | 0.0641 | 93.60% |
More detail see: Runtime readme
4)Run demo
We provide a quick experience method as follow:
cd athena
source tools/env.sh
#ASR test
# Batch decoding test
python athena/run_demo.py --inference_type asr --saved_model_dir examples/asr/aishell/models/freeze_prefix_beam-20220620 --wav_list test.lst
# One wav test
python athena/run_demo.py --inference_type asr --saved_model_dir examples/asr/aishell/models/freeze_prefix_beam-20220620 --wav_dir aishell/wav/test/S0764/BAC009S0764W0121.wav
#TTS test
python athena/run_demo.py --inference_type tts --text_csv examples/tts/data_baker/test/test.csv --saved_model_dir athena-model-zoo/tts/data_baker/saved_model There are some pre-trained models and you can find at: Athena-model-zoo
More examples you can find at:
5) Supported Model architectures and reference
The Athena-v2.0 can support these architectures:
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| Model Name | Task | Referenced Papers |
|---|---|---|
| Transformer | ASR | Dong L, Xu S, Xu B. Speech-transformer: a no-recurrence sequence-to-sequence model for speech recognition[C]//2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, 2018: 5884-5888. |
| Conformer | ASR | Gulati A, Qin J, Chiu C C, et al. Conformer: Convolution-augmented transformer for speech recognition[J]. arXiv preprint arXiv:2005.08100, 2020. |
| Transformer-U2 | ASR | Yao Z, Wu D, Wang X, et al. Wenet: Production oriented streaming and non-streaming end-to-end speech recognition toolkit[J]. arXiv preprint arXiv:2102.01547, 2021. |
| Conformer-U2 | ASR | Yao Z, Wu D, Wang X, et al. Wenet: Production oriented streaming and non-streaming end-to-end speech recognition toolkit[J]. arXiv preprint arXiv:2102.01547, 2021. |
| AV_Transformer | ASR | |
| AV_Conformer | ASR | |
| Fastspeech | TTS | Ren Y, Ruan Y, Tan X, et al. Fastspeech: Fast, robust and controllable text to speech[J]. Advances in Neural Information Processing Systems, 2019, 32. |
| Fastspeech2 | TTS | Ren Y, Hu C, Tan X, et al. Fastspeech 2: Fast and high-quality end-to-end text to speech[J]. arXiv preprint arXiv:2006.04558, 2020. |
| Tacotron2 | TTS | Shen J, Pang R, Weiss R J, et al. Natural tts synthesis by conditioning wavenet on mel spectrogram predictions[C]//2018 IEEE international conference on acoustics, speech and signal processing (ICASSP). IEEE, 2018: 4779-4783. |
| TTS_Transfprmer | TTS | Li N, Liu S, Liu Y, et al. Neural speech synthesis with transformer network[C]//Proceedings of the AAAI Conference on Artificial Intelligence. 2019, 33(01): 6706-6713. |
| Marblenet | VAD | Jia F, Majumdar S, Ginsburg B. Marblenet: Deep 1d time-channel separable convolutional neural network for voice activity detection[C]//ICASSP 2021-2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, 2021: 6818-6822. |
| DNN | VAD | Tashev I, Mirsamadi S. DNN-based causal voice activity detector[C]//Information Theory and Applications Workshop. 2016. |
| CNN-DNN, CRNN, A-Transformer, A-Conformer, AV-Transformer | KWS | Xu Y, Sun J, Han Y, et al. Audio-Visual Wake Word Spotting System for MISP Challenge 2021[C]//ICASSP 2022-2022 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, 2022: 9246-9250. |
6) Directory Structure
Below is the basic directory structure for Athena
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|-- Athena
| |-- data # - root directory for input-related operations
| | |-- datasets # custom datasets for ASR, TTS and pre-training
| |-- layers # some layers
| |-- models # some models
| |-- tools # contains various tools, e.g. decoding tools
| |-- transform # custom featureizer based on C++
| | |-- feats
| | | |-- ops # c++ code on tensorflow ops
| |-- utils # utils, e.g. checkpoit, learning_rate, metric, etc
|-- docker
|-- docs # docs
|-- examples # example scripts for ASR, TTS, etc
| |-- asr # each subdirectory contains a data preparation scripts and a run script for the task
| | |-- aishell
| | |-- hkust
| | |-- librispeech
| | |-- gigaspeech
| | |-- misp
| |-- kws ## Word wake spotting
| | |-- misp
| | |-- xtxt
| | |-- yesno
| |-- tts ## TTS examples
| | |-- data_baker
| | |-- ljspeech
| |-- vad #VAD example
| |--google_dataset_v2
|-- tools # need to source env.sh before training#7) Acknowledgement
We want to thank Espnet, Wenet, TensorFlowTTS, NeMo, etc. These great projects give us lots of references and inspirations!