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Part of Speech Tagging Using Hidden Markov Models

Author

Listed:
  • Bărbulescu Adrian
  • Morariu Daniel I.

    (Computer Science and Electrical and Electronics Engineering Department, Faculty of Engineering, “Lucian Blaga” University of Sibiu, Romania)

Abstract

In this paper, we present a wide range of models based on less adaptive and adaptive approaches for a PoS tagging system. These parameters for the adaptive approach are based on the n-gram of the Hidden Markov Model, evaluated for bigram and trigram, and based on three different types of decoding method, in this case forward, backward, and bidirectional. We used the Brown Corpus for the training and the testing phase. The bidirectional trigram model almost reaches state of the art accuracy but is disadvantaged by the decoding speed time while the backward trigram reaches almost the same results with a way better decoding speed time. By these results, we can conclude that the decoding procedure it’s way better when it evaluates the sentence from the last word to the first word and although the backward trigram model is very good, we still recommend the bidirectional trigram model when we want good precision on real data.

Suggested Citation

  • Bărbulescu Adrian & Morariu Daniel I., 2020. "Part of Speech Tagging Using Hidden Markov Models," International Journal of Advanced Statistics and IT&C for Economics and Life Sciences, Sciendo, vol. 10(1), pages 31-42, December.
    • Handle: RePEc:vrs:ijsiel:v:10:y:2020:i:1:p:31-42:n:8
    DOI: 10.2478/ijasitels-2020-0005
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