The TNO Speaker Diarization System for NIST RT05s Meeting Data

  • David A. van Leeuwen
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3869)


The TNO speaker speaker diarization system is based on a standard BIC segmentation and clustering algorithm. Since for the NIST Rich Transcription speaker dizarization evaluation measure correct speech detection appears to be essential, we have developed a speech activity detector (SAD) as well. This is based on decoding the speech signal using two Gaussian Mixture Models trained on silence and speech. The SAD was trained on only AMI development test data, and performed quite well in the evaluation on all 5 meeting locations, with a SAD error rate of 5.0 %. For the speaker clustering algorithm we optimized the BIC penalty parameter λ to 14, which is quite high with respect to the theoretical value of 1. The final speaker diarization error rate was evaluated at 35.1 %.


Bayesian Information Criterion Gaussian Mixture Model Speech Recognition System Universal Background Model Speaker Diarization 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • David A. van Leeuwen
    • 1
  1. 1.TNO Human FactorsSoesterbergThe Netherlands

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