arXiv — NLP / Computation & Language · · 3 min read

THA: Weighted Finite-State Text Normalization and Inverse Text Normalization for Khmer

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Computer Science > Computation and Language

arXiv:2609.30984 (cs)
[Submitted on 25 Sep 2026]

Title:THA: Weighted Finite-State Text Normalization and Inverse Text Normalization for Khmer

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Abstract:Text-to-speech needs written text in spoken form, and speech recognition output needs the reverse. For Khmer, neither direction has a maintained open-source tool, and the script makes both harder: words are not separated by spaces, and number words occur inside ordinary words. We present Tha, a Khmer text normalization and inverse text normalization toolkit built from weighted finite-state transducers. It segments and classifies a whole line in one shortest-path search, and a second transducer rejects token boundaries inside a Khmer syllable. On Google's Khmer test suite, Tha agrees with the reference on all 274 cardinals up to one spelling variant, and on 2,906 real TTS prompts, 153 of the 158 sentences it rewrites are correct. Tha is open source under the Apache 2.0 license.
Subjects: Computation and Language (cs.CL)
Cite as: arXiv:2609.30984 [cs.CL]
  (or arXiv:2609.30984v1 [cs.CL] for this version)
  https://doi.org/10.48550/arXiv.2609.30984
arXiv-issued DOI via DataCite (pending registration)

Submission history

From: Seanghay Yath [view email]
[v1] Fri, 25 Sep 2026 08:31:16 UTC (401 KB)
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