---
language:
- lus
license: apache-2.0
pipeline_tag: automatic-speech-recognition
base_model: openai/whisper-medium
tags:
- generated_from_trainer
datasets:
- andrewbawitlung/MiZonal-v3.0
metrics:
- wer
- cer
model-index:
- name: whisper-medium-mizonal3-E4-lus-v2026.06
  results:
  - task:
      name: Automatic Speech Recognition
      type: automatic-speech-recognition
    dataset:
      name: MiZonal v3.0
      type: andrewbawitlung/MiZonal-v3.0
      config: default
      split: test
    metrics:
    - name: Wer
      type: wer
      value: 19.9372
    - name: Cer
      type: cer
      value: 5.8077
    - name: Real Time Factor
      type: rtf
      value: 0.0525
---
![Mizo Automatic Speech Recognition (ASR) Models v3.0](banner.jpg)

<!-- This model card has been generated automatically according to the information the Trainer had access to. You
should probably proofread and complete it, then remove this comment. -->

# whisper-medium-mizonal3-E4-lus-v2026.06

This model is a fine-tuned version of [openai/whisper-medium](https://huggingface.co/openai/whisper-medium) on the **MiZonal v3.0** dataset. 
Note: ~1 hour of conversational speech was added to this dataset version.

It achieves the following results on the evaluation set:
- Wer: 19.9372
- Cer: 5.8077
- Real Time Factor: 0.0525

## Quick Inference


```python
import torch
import librosa
from transformers import WhisperProcessor, WhisperForConditionalGeneration

device = "cuda" if torch.cuda.is_available() else "cpu"

processor = WhisperProcessor.from_pretrained("andrewbawitlung/whisper-medium-mizonal3-E4-lus-v2026.06")
model = WhisperForConditionalGeneration.from_pretrained("andrewbawitlung/whisper-medium-mizonal3-E4-lus-v2026.06").to(device)

audio, sr = librosa.load("your_audio.wav", sr=16000)
input_features = processor(audio, sampling_rate=16000, return_tensors="pt").input_features.to(device)

with torch.no_grad():
    predicted_ids = model.generate(input_features, max_new_tokens=256)

transcription = processor.batch_decode(predicted_ids, skip_special_tokens=True)[0]
print(transcription)
```


## Model description

### Experiment Configurations
This repository is part of a series of experiments. The different configurations are:
- **E1 (Baseline):** Standard training configuration.
- **E2 (Noise):** Training with background noise augmentation.
- **E3 (Speed):** Training with speed perturbation augmentation.
- **E4 (SpecAug):** Training with SpecAugment (time and frequency masking).
- **E5 (Combined):** Training with a combination of all augmentations.

### All Models in this Family
| Experiment | Hugging Face Repository |
| :--- | :--- |
| **E1 (Baseline)** | [andrewbawitlung/whisper-medium-mizonal3-E1-lus-v2026.06](https://huggingface.co/andrewbawitlung/whisper-medium-mizonal3-E1-lus-v2026.06) |
| **E2 (Noise)** | [andrewbawitlung/whisper-medium-mizonal3-E2-lus-v2026.06](https://huggingface.co/andrewbawitlung/whisper-medium-mizonal3-E2-lus-v2026.06) |
| **E3 (Speed)** | [andrewbawitlung/whisper-medium-mizonal3-E3-lus-v2026.06](https://huggingface.co/andrewbawitlung/whisper-medium-mizonal3-E3-lus-v2026.06) |
| **E4 (SpecAug)** | [andrewbawitlung/whisper-medium-mizonal3-E4-lus-v2026.06](https://huggingface.co/andrewbawitlung/whisper-medium-mizonal3-E4-lus-v2026.06) |
| **E5 (Combined)** | [andrewbawitlung/whisper-medium-mizonal3-E5-lus-v2026.06](https://huggingface.co/andrewbawitlung/whisper-medium-mizonal3-E5-lus-v2026.06) |

### Training hyperparameters

The following hyperparameters were used during training:
- learning_rate: 0.0003
- train_batch_size: 8
- eval_batch_size: 8
- seed: 42
- optimizer: OptimizerNames.ADAMW_TORCH_FUSED
- lr_scheduler_type: SchedulerType.LINEAR
- num_epochs: 8

### Training results

| step | epoch | train_loss | eval_loss | eval_wer | eval_cer | learning_rate | grad_norm |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 250 | 0.91 | 0.6876 | 0.6007 | 75.55 | 48.97 | 1.49e-04 | 6.11 |
| 500 | 1.82 | 0.8456 | 0.8232 | 77.84 | 37.25 | 2.99e-04 | 9.15 |
| 750 | 2.73 | 0.6257 | 0.6778 | 46.98 | 23.99 | 2.56e-04 | 6.32 |
| 1000 | 3.64 | 0.4293 | 0.5844 | 29.30 | 10.78 | 2.12e-04 | 3.50 |
| 1250 | 4.55 | 0.2535 | 0.5866 | 26.82 | 9.56 | 1.68e-04 | 3.09 |
| 1500 | 5.46 | 0.1521 | 0.5415 | 23.69 | 10.97 | 1.24e-04 | 1.96 |
| 1750 | 6.36 | 0.0778 | 0.5008 | 22.02 | 7.08 | 7.96e-05 | 1.44 |
| 2000 | 7.27 | 0.0366 | 0.4628 | 19.28 | 6.15 | 3.55e-05 | 1.09 |