Reproduce “Dynamic Language Group-Based MoE: Enhancing Code-Switching Speech Recognition with Hierarchical Routing” on OpenResearch

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About this paper

Hukai Huang, Shenghui Lu, Yahui Shan, He Qu, Fengrun Zhang, Wenhao Guan, Qingyang Hong, Lin Li

The Dynamic Language Group-based Mixture of Experts (DLG-MoE) model enhances code-switching Automatic Speech Recognition through a hierarchical routing mechanism that explicitly identifies languages and implicitly models sub-linguistic variations. This approach achieves significant performance improvements over existing methods and offers flexible deployment options.

Key insights

  • The combination of explicit language routing and implicit sub-linguistic routing within language groups effectively decouples and models the multi-faceted complexities of code-switching speech.
  • A dynamic top-k training strategy allows the model to generalize across various inference-time computational budgets, maintaining performance while adapting to different efficiency requirements.
  • The use of CTC for language identification, even without explicit frame-level LID labels, provides an accurate and causal mechanism suitable for streaming ASR and enables flexible model pruning for monolingual tasks.

Summary by alphaXiv.

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