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Rong-Qi Han

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#natural language process... Preprint Aug 2026

Scaling phoneme-based TTS augmentation for ASR: A unified pipeline and controlled study

A unified phoneme-based TTS-to-ASR augmentation pipeline built around a multilingual TTS model trained from scratch using the F5-TTS architecture with language-ID conditioning is presented and phoneme-frequency-guided selection (PFGS) is proposed, which ranks candidate sentences using phoneme frequencies estimated from real ASR training labels.

Zhen Wang, Tian-Rui Wu, Rong-Qi Han et al. · 0 citations

Preprint Jul 2026

Diarization-Guided Qwen-ASR Adaptation for Multilingual Two-Speaker Conversational Speech

Results show that supervised fine-tuning provides the largest gain, while synthetic-speech LoRA adaptation and reinforcement learning further improve robustness, while synthetic-speech LoRA adaptation and reinforcement learning further improve robustness.

Hao Wu, Rong-Qi Han, Zhen Wang et al. · 0 citations