Energy Normalization in Automatic Speech Recognition

  • Authors:

  • Nikša Jakovljević;Marko Janev;Darko Pekar;Dragiša Mišković

  • Affiliations:

  • Faculty of Engineering, University of Novi Sad, Novi Sad, Serbia 21000;Faculty of Engineering, University of Novi Sad, Novi Sad, Serbia 21000;AlfaNum ltd., Novi Sad, Serbia 21000;Faculty of Engineering, University of Novi Sad, Novi Sad, Serbia 21000

  • Venue:
  • TSD '08 Proceedings of the 11th international conference on Text, Speech and Dialogue
  • Year:
  • 2008

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Abstract

In this paper a novel method for energy normalization is presented. The objective of this method is to remove unwanted energy variations caused by different microphone gains, various loudness levels across speakers, as well as changes of single speaker loudness level over time. The solution presented here is based on principles used in automatic gain control. The use of this method results in relative improvement of the performances of an automatic speech recognition system by 26 %.