Phonetic Sequence to Graphemes Conversion Based on DTW and One-Stage Algorithms

  • Rafael Teruszkin
  • Fernando Gil Vianna ResendeJr.
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3960)


This work proposes an algorithm for converting phonetic sequences into graphemes using DTW on the recognition of isolated words or closed sentences, and using One-Stage on a continuous speech recognition task. Most speech recognition systems resolve the task of recognition on a single stage without having an intermediate phonetic sequence result. The proposed solution is hybrid in the sense that it uses HMMs and Viterbi Decoding for recognizing a phonetic sequence (actually, triphones) and then DTW or One-Stage to generate the corresponding graphemes. Experimental results showed an average accuracy rate of 100% on the recognition of closed sentences, and average word recognition rate of 84% for the continuous speech recognition task.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Rafael Teruszkin
    • 1
  • Fernando Gil Vianna ResendeJr.
    • 1
    • 2
  1. 1.Programa de Engenharia ElétricaCOPPE, UFRJBrazil
  2. 2.Departamento de Engenharia Eletrônica e de ComputaçãoEscola Politécnica, UFRJBrazil

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