---
license: apache-2.0
language:
- en
base_model:
- k2-fsa/sherpa-onnx-gtcrn-dereverb-advanced-v0
pipeline_tag: audio-to-audio
tags:
- sherpa-onnx
- axera
- ax650
- axmodel
- gtcrn
- speech-enhancement
- denoising
- dereverberation
- pulsar2
---

# sherpa-onnx-gtcrn-ax650

GTCRN (Grouped Temporal Convolutional Recurrent Network) speech enhancement model converted to AX650 AXMODEL for on-device denoising and dereverberation via sherpa-onnx.

## Model Details

- **Original Model**: [k2-fsa/sherpa-onnx-gtcrn-dereverb-advanced-v0](https://hf-mirror.com/k2-fsa/sherpa-onnx-gtcrn-dereverb-advanced-v0)
- **Architecture**: GTCRN (Grouped Temporal Convolutional Recurrent Network)
- **Task**: Speech enhancement (denoising + dereverberation)
- **Sample rate**: 16000 Hz
- **Target Chip**: AX650 (NPU3)
- **Quantization**: U16

## Files

| File | Size | Description |
|------|------|-------------|
| `gtcrn.bin` | 1.8 MB | GTCRN speech enhancement AXMODEL |

> **Note**: The model file uses `.bin` extension for upload compatibility. Rename to `.axmodel` if needed by your sherpa-onnx build, or use as-is.

## Usage with sherpa-onnx

```bash
./sherpa-onnx-offline-denoiser \
  --gtcrn-model=gtcrn.bin \
  --provider=axera \
  noisy.wav enhanced.wav
```

## Performance

| Metric | Value |
|--------|-------|
| AXMODEL size | 1.8 MB |
| RTF | TBD |

## Conversion Details

- **Pulsar2 Version**: 5.1
- **Calibration**: MinMax with 10 samples
- **Input Shape**: [1, 256, 257]

## License

Apache 2.0