---
license: cc-by-4.0
base_model: BUT-FIT/DiCoW_v3_3
tags: [onnx, whisper, speaker-diarization, target-speaker-asr, dicow]
---

# DiCoW v3.3, ONNX

ONNX export of [BUT-FIT/DiCoW_v3_3](https://huggingface.co/BUT-FIT/DiCoW_v3_3) (revision `c34b64d9a9c5148c65fd355bb188d60343a6b44f`) for
[bolo](https://github.com/cb-Sigma/bolo), which runs it with ONNX Runtime and NumPy, without PyTorch.
DiCoW (Diarization-Conditioned Whisper) is Whisper large-v3-turbo conditioned on per-frame speaker activity
(silence / target / non-target / overlap masks), so a recording is transcribed once per diarized speaker,
overlapping speech included. The model is by the Speech@FIT group of Brno University of Technology and is
licensed CC-BY-4.0; this conversion keeps that licence. Changes: the weights are exported unchanged to two
graphs (encoder with FDDT conditioning and the decoder's cross-attention projections; decoder with a key/value
cache); the `*.int8.onnx` graphs are dynamically quantised (int8 weights, per output channel; the encoder's
feed-forward output matrices stay fp32). The CTC head is not included (the published generation settings do not
use it). On 24 AMI excerpts the int8 graphs scored the same cpWER as the PyTorch model (26.0 %); details in bolo's
docs/models.md, "DiCoW without PyTorch".

Exported with `server/tools/export_dicow_onnx.py` from the bolo repository; checksums in `dicow_onnx.json`.

If you use the model, please cite the papers its model card lists:

- A. Polok et al., "DiCoW: Diarization-conditioned Whisper for target speaker automatic speech recognition",
  Computer Speech & Language 95, 2026, doi:10.1016/j.csl.2025.101841.
- A. Polok et al., "Target Speaker ASR with Whisper", ICASSP 2025, doi:10.1109/ICASSP49660.2025.10887683.
- A. Polok, D. Klement, S. Cornell, M. Wiesner, J. Černocký, S. Khudanpur, L. Burget, "SE-DiCoW: Self-Enrolled
  Diarization-Conditioned Whisper", arXiv:2601.19194, 2026.