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Partial Classification in Speech Recognition Verification

  • Gustavo Hern’
  • andez Ábrego
  • Israel Torres S’nchez
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2085)

Abstract

Due to speech recognition imperfections, recognition results need to be verified before being used in real-life applications. Here we present two perspectives for recognition verification: direct classification and partial classification based on confidence measures. Linear classifiers, decision trees and perceptrons are used here as direct classifiers. On the other hand, we compute confidence measures through several methods, being MLP’s and evolutionary fuzzy systems the best performing ones. Experimentation with three types of speech input reveals that higher correct verification rates can be achieved when verification is based on confidence measures. Moreover, classification rates can be improved when verification does not have to deal with “uncertain” examples, which are not classified. Partial classification represents a trade-off between verification accuracy and the number of recognition results verified.

Keywords

False Alarm Speech Recognition Recognition Result Fuzzy Logic System Continuous Speech 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Gustavo Hern’
    • 1
  • andez Ábrego
    • 1
  • Israel Torres S’nchez
    • 2
  1. 1.Spoken Language Technology, Sony U.S. Research Labs.San JoseUSA
  2. 2.Signal Theory and Communications DepartmentUniversitat Politècnica de CatalunyaBarcelonaSpain

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