Data-Driven Impostor Selection for T-Norm Score Normalisation and the Background Dataset in SVM-Based Speaker Verification

  • Mitchell McLaren
  • Robbie Vogt
  • Brendan Baker
  • Sridha Sridharan
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5558)


A data-driven background dataset refinement technique was recently proposed for SVM based speaker verification. This method selects a refined SVM background dataset from a set of candidate impostor examples after individually ranking examples by their relevance. This paper extends this technique to the refinement of the T-norm dataset for SVM-based speaker verification. The independent refinement of the background and T-norm datasets provides a means of investigating the sensitivity of SVM-based speaker verification performance to the selection of each of these datasets. Using refined datasets provided improvements of 13% in min. DCF and 9% in EER over the full set of impostor examples on the 2006 SRE corpus with the majority of these gains due to refinement of the T-norm dataset. Similar trends were observed for the unseen data of the NIST 2008 SRE.


Support Vector Machine Support Vector Full Dataset Speaker Recognition Speaker Verification 
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 2009

Authors and Affiliations

  • Mitchell McLaren
    • 1
  • Robbie Vogt
    • 1
  • Brendan Baker
    • 1
  • Sridha Sridharan
    • 1
  1. 1.Speech and Audio Research LaboratoryQUTBrisbaneAustralia

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