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arXiv · 2508.14916

Transsion Multilingual Speech Recognition System for MLC-SLM 2025 Challenge

Xiaoxiao Li·An Zhu·Youhai Jiang·Fengjie Zhu
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Abstract

This paper presents the architecture and performance of a novel Multilingual Automatic Speech Recognition (ASR) system developed by the Transsion Speech Team for Track 1 of the MLC-SLM 2025 Challenge. The proposed system comprises three key components: 1) a frozen Whisper-large-v3 based speech encoder, leveraging large-scale pretraining to ensure robust acoustic feature extraction; 2) a trainable adaptor module using Linear-ReLU-Linear transformation mechanisms to effectively align speech and text representations; and 3) a frozen Qwen2.5-7B-Instruct large language model (LLM) integrated with trainable LoRA for optimized contextual linguistic decoding. By systematically combining pretrained models with task specific fine-tuning, the system achieved a word/character error rate (WER/CER) of 9.83% across 11 languages in the evaluation set and ranked third place among global participants.

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Xiaoxiao Li, An Zhu, Youhai Jiang, Fengjie Zhu. 2025-08-15. Transsion Multilingual Speech Recognition System for MLC-SLM 2025 Challenge. https://arxiv.org/abs/2508.14916

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