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- README.md +121 -0
- stt-bm-quartznet15x5.nemo +3 -0
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README.md
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---
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language:
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- bm
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library_name: nemo
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datasets:
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- RobotsMali/bam-asr-all
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thumbnail: null
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tags:
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- automatic-speech-recognition
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- speech
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- audio
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- CTC
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- QuartzNet
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- pytorch
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- Bambara
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- NeMo
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license: cc-by-4.0
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base_model: stt_fr_quartznet15x5
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model-index:
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- name: stt-bm-quartznet15x5
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results:
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- task:
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name: Automatic Speech Recognition
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type: automatic-speech-recognition
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dataset:
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name: bam-asr-all
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type: RobotsMali/bam-asr-all
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split: test
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args:
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language: bm
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metrics:
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- name: Test WER
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type: wer
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value: 46.5
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metrics:
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- wer
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pipeline_tag: automatic-speech-recognition
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---
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# QuartzNet 15x5 CTC Bambara
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<style>
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img {
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display: inline;
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}
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</style>
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[](#model-architecture)
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| [](#model-architecture)
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| [](#datasets)
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`stt-bm-quartznet15x5` is a fine-tuned version of NVIDIA’s [`stt_fr_quartznet15x5`](https://catalog.ngc.nvidia.com/orgs/nvidia/teams/nemo/models/stt_fr_quartznet15x5) optimized for **Bambara ASR**. This model cannot write **Punctuations and Capitalizations**, it utilizes a character encoding scheme, and transcribes text in the standard character set that is provided in the training set of bam-asr-all dataset.
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The model was fine-tuned using **NVIDIA NeMo** and is trained with **CTC (Connectionist Temporal Classification) Loss**.
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## NVIDIA NeMo: Training
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To fine-tune or use the model, install [NVIDIA NeMo](https://github.com/NVIDIA/NeMo). We recommend installing it after setting up the latest PyTorch version.
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```bash
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pip install nemo_toolkit['asr']
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```
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## How to Use This Model
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### Load Model with NeMo
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```python
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import nemo.collections.asr as nemo_asr
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asr_model = nemo_asr.models.EncDecCTCModel.from_pretrained(model_name="RobotsMali/stt-bm-quartznet15x5")
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```
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### Transcribe Audio
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```python
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# Assuming you have a test audio file named sample_audio.wav
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asr_model.transcribe(['sample_audio.wav'])
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```
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### Input
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This model accepts **16 kHz mono-channel audio (wav files)** as input.
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### Output
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This model provides transcribed speech as a string for a given speech sample.
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## Model Architecture
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QuartzNet is a convolutional architecture, which consists of **1D time-channel separable convolutions** optimized for speech recognition. More information on QuartzNet can be found here: [QuartzNet Model](https://docs.nvidia.com/nemo-framework/user-guide/latest/nemotoolkit/asr/models.html#quartznet).
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## Training
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The NeMo toolkit was used to fine-tune this model for **25939 steps** over the `stt_fr_quartznet15x5` model. This model is trained with this [base config](https://github.com/diarray-hub/bambara-asr/blob/main/configs/quartznet-20m-config-v2.yaml). The full training configurations, scripts, and experimental logs are available here:
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🔗 [Bambara-ASR Experiments](https://github.com/diarray-hub/bambara-asr)
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## Dataset
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This model was fine-tuned on the [bam-asr-all](https://huggingface.co/datasets/RobotsMali/bam-asr-all) dataset, which consists of **37 hours of transcribed Bambara speech data**. The dataset is primarily derived from **Jeli-ASR dataset** (~87%).
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## Performance
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The performance of Automatic Speech Recognition models is measured using **Word Error Rate (WER%)**.
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|**Version**|**Tokenizer**|**Vocabulary Size**|**bam-asr-all (test set)**|
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|---------|-----------------------|-----------------|---------|
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| V2 | Character-wise | 45 | 46.5 |
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These are **greedy WER numbers without external LM**.
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## License
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This model is released under the **CC-BY-4.0** license. By using this model, you agree to the terms of the license.
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---
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More details are available in the **Experimental Technical Report**:
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📄 [Draft Technical Report - Weights & Biases](https://wandb.ai/yacoudiarra-wl/bam-asr-nemo-training/reports/Draft-Technical-Report-V1--VmlldzoxMTIyOTMzOA).
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Feel free to open a discussion on Hugging Face or [file an issue](https://github.com/diarray-hub/bambara-asr/issues) on GitHub if you have any contributions.
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---
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stt-bm-quartznet15x5.nemo
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size 76400640
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