A novel voting scheme for ROVER using automatic error detection

  • Authors:
  • Kacem Abida;Fakhri Karray;Wafa Abida

  • Affiliations:
  • Electrical and Computer Engineering Department, University of Waterloo, Waterloo, Ontario, Canada;Electrical and Computer Engineering Department, University of Waterloo, Waterloo, Ontario, Canada;Voice Enabling Systems Technology, Waterloo, Ontario, Canada

  • Venue:
  • AIS'12 Proceedings of the Third international conference on Autonomous and Intelligent Systems
  • Year:
  • 2012

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Abstract

Recognizer Output Voting Error Reduction (ROVER), is a well-known procedure for decoders' output combination aiming at reducing the Word Error Rate (WER) in large vocabulary transcriptions. This paper presents a novel voting scheme to boost the current ROVER's performance. A contextual analysis is carried out to compute robust confidence scores, which are used during the voting stage. The confidence scores are collected from several automatic error detectors. Experiments have proven that it is possible to outperform the ROVER voting schemes.