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C. Bao

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Conference paper (2025) - C. Bao, Chuanbing Huo, C. Gao
This paper proposes AS-ASR, a lightweight aphasiaspecific speech recognition framework based on Whisper-tiny, tailored for low-resource deployment on edge devices. Our approach introduces a hybrid training strategy that systematically combines standard and aphasic speech at varying ratios, enabling robust generalization, and a GPT-4-based reference enhancement method that refines noisy aphasic transcripts, improving supervision quality. We conduct extensive experiments across multiple data mixing configurations and evaluation settings. Results show that our fine-tuned model significantly outperforms the zero-shot baseline, reducing WER on aphasic speech by over $30 \%$ while preserving performance on standard speech. The proposed framework offers a scalable, efficient solution for realworld disordered speech recognition. ...