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Dec 11, 2020 · Artificial Intelligence

Weighted Finite State Transducers (WFST) in Traditional Speech Recognition: Principles and Optimization

This article explains the role of Weighted Finite State Transducers in conventional HMM‑based speech recognition, covering language models, pronunciation dictionaries, WFST definitions, semiring theory, composition and determinization operations, decoding graph construction (HCLG), lattice rescoring, and practical optimization techniques for real‑world scenarios.