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Virach Sornlertlamvanich Information R&D Division (iTech)

Thai Linguistic Resources. Virach Sornlertlamvanich Information R&D Division (iTech) National Electronics and Computer Technology Center (NECTEC) THAILAND 19 January 2001 Symposium on Language Resources in Asia. Linguistic. Linguistic. Knowledge. Training. Knowledge. Resources.

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Virach Sornlertlamvanich Information R&D Division (iTech)

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  1. Thai Linguistic Resources Virach Sornlertlamvanich Information R&D Division (iTech) National Electronics and Computer Technology Center (NECTEC) THAILAND 19 January 2001 Symposium on Language Resources in Asia

  2. Linguistic Linguistic Knowledge Training Knowledge Resources Defining Statistical Rules Modeling Top-Down Bottom-Up Models Adjust Adjust Evaluation Evaluation Resources How Important ! Language Processing • Linguistic resources are necessary even in top-down and bottom-up design • Exploitable in modeling and evaluation

  3. What we need ? • Lexicon / Dictionary (30k) • Tagged Text (2MB) / Speech Corpora • Language Model • Word Extraction (ML; p=85%; r=56%) • Word Segmentation / POS tagger (ML; 96-97%) • Sentence Segmentation (ML; 85-89%) • Grapheme-to-Phoneme Conversion (PGLR; 73-90%) • Word Sense Disambiguation • Corpus / UNL / UW (concept) Editor • MT (ParSit; http://come.to/parsit) / UNL • Text Summarization • Speech Recognition / Synthesis

  4. Our Workbench …

  5. Open Linguistic Resources • • LEXiTRON v 1.1 (a corpus based T-E dictionary, 1994) • About 11,000 Thai entries; 9,000 English entries • http://www.links.nectec.or.th/lexit • • Thai Royal Institute Dictionary (T-T dictionary) • Basic term 32,000 entries • Technical term 15,339 entries • http://www.royin.go.th/ • • ORCHID POS-Tagged Corpus (supported by CRL, 1997) • 160 documents; 2MB text; 400K words • XML tagged for Paragraph, Sentence, Word, Part-of-Speech (47 tags) • http://www.links.nectec.or.th/orchid • ParSit (http://come.to/parsit, 2000)

  6. Ongoing : Thai Speech Corpus #1 Scope (2001) • Large Vocabulary Continuous Speech Recognition (LVCSR) Corpus - Phonetically-balanced sentences - 5K vocabulary coverage sentences • Corpus for Text-to-Speech Synthesis - 400 phonetically and prosodic-balanced sentences - For probabilistic prosody generation • Dialog speech corpus (collaboration with ATR) - 50 conversations, 2,099 sentences - 5,000 words, 866 phonetically-balanced sentences - 40 speakers (males and females)

  7. Ongoing : Thai Speech Corpus #2 Procedure

  8. Ongoing : Thai Speech Corpus #3 Tools Corpus Editor XML Corpus Plain Text

  9. Ongoing : Thai Speech Corpus #4 Text Sources • Technology Promotion Association (Thailand-Japan) • Amarin Printing Co., Ltd. • Matichon Public Co., Ltd. Project Collaboration • Kasetsart University • Thammasat University • King’s Mongkut University of Technology Thonburi • Prince of Songkhla University

  10. Ongoing : Thai Speech Corpus #5

  11. Ongoing : LEXiTRON v 2.0 #1 Scope (2001) Procedure • Entries - 25,000 Thai - English - 25,000 English - Thai • Fields - Translation - Phonetics - Root of vocabulary - Part-of-speech - Synonym - Antonym - Sentence sample

  12. Ongoing : LEXiTRON v 2.0 #2 Wordnet Tools Dictionary DB Phonetic Symbols Corpus-based Sample Sentences

  13. Discussion • Language difficulties; 13 Tai-family languages • Text sources • Common tagset • Resource center • Institutional collaboration

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