uDistil-Whisper: Label-Free Data Filtering for Knowledge Distillation in Low-Data Regimes
Abdul Waheed, Karima Kadaoui, Bhiksha Raj, Muhammad Abdul-Mageed
Abstract
Recent work on distilling Whisper’s knowledge into small models using pseudo-labels shows promising performance while reducing the size by up to 50%. This results in small, efficient, and dedicated models. However, a critical step of distillation using pseudo-labels involves filtering high-quality predictions and using only those during training. This step requires ground truth labels to compare with and filter low-quality examples, making the process dependent on human labels. Additionally, the distillation process requires a large amount of data thereby limiting its applicability in low-resource settings. To address this, we propose a distillation framework that does not require any labeled data. Through experimentation, we show that our best-distilled models outperform the teacher model by 5-7 WER points and are on par with or outperform similar supervised data filtering setups. When scaling the data, our models significantly outperform all zero-shot and supervised models. Our models are also 25-50% more compute- and memory-efficient while maintaining performance equal to or better than that of the teacher model. For more details about our models, dataset, and other resources, please visit our GitHub page: https://github.com/UBC-NLP/uDistilWhisper.- Anthology ID:
- 2025.naacl-long.296
- Volume:
- Proceedings of the 2025 Conference of the Nations of the Americas Chapter of the Association for Computational Linguistics: Human Language Technologies (Volume 1: Long Papers)
- Month:
- April
- Year:
- 2025
- Address:
- Albuquerque, New Mexico
- Editors:
- Luis Chiruzzo, Alan Ritter, Lu Wang
- Venue:
- NAACL
- SIG:
- Publisher:
- Association for Computational Linguistics
- Note:
- Pages:
- 5750–5767
- Language:
- URL:
- https://preview.aclanthology.org/fix-sig-urls/2025.naacl-long.296/
- DOI:
- Cite (ACL):
- Abdul Waheed, Karima Kadaoui, Bhiksha Raj, and Muhammad Abdul-Mageed. 2025. uDistil-Whisper: Label-Free Data Filtering for Knowledge Distillation in Low-Data Regimes. In Proceedings of the 2025 Conference of the Nations of the Americas Chapter of the Association for Computational Linguistics: Human Language Technologies (Volume 1: Long Papers), pages 5750–5767, Albuquerque, New Mexico. Association for Computational Linguistics.
- Cite (Informal):
- uDistil-Whisper: Label-Free Data Filtering for Knowledge Distillation in Low-Data Regimes (Waheed et al., NAACL 2025)
- PDF:
- https://preview.aclanthology.org/fix-sig-urls/2025.naacl-long.296.pdf