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Improving Multilingual ASR in the Wild Using Simple N-best Re-ranking

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arxiv 2409.18428 v1 pith:NRY65A3D submitted 2024-09-27 cs.CL cs.SDeess.AS

Brian Yan , Vineel Pratap , Shinji Watanabe , Michael Auli This is my paper · ORCID
classification cs.CLcs.SDeess.AS
keywords modelslanguageaccuracyidentificationmultilingualautomaticn-bestre-ranking
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Multilingual Automatic Speech Recognition (ASR) models are typically evaluated in a setting where the ground-truth language of the speech utterance is known, however, this is often not the case for most practical settings. Automatic Spoken Language Identification (SLID) models are not perfect and misclassifications have a substantial impact on the final ASR accuracy. In this paper, we present a simple and effective N-best re-ranking approach to improve multilingual ASR accuracy for several prominent acoustic models by employing external features such as language models and text-based language identification models. Our results on FLEURS using the MMS and Whisper models show spoken language identification accuracy improvements of 8.7% and 6.1%, respectively and word error rates which are 3.3% and 2.0% lower on these benchmarks.

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Cited by 1 Pith paper

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  1. Efficient Multilingual ASR Finetuning via LoRA Language Experts

    cs.CL 2025-06 conditional novelty 5.0 of 10

    Monolingual LoRA language experts, combined by weighted merging (MoLE) or layer-wise knowledge distillation, improve Whisper-based multilingual ASR by about 10-15% relative WER over a plain multilingual LoRA baseline.

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