COST278 and ISCA Tutorial and Research Workshop (ITRW) on Robustness Issues in Conversational Interaction

University of East Anglia, Norwich, UK
August 30-31, 2004

Cepstral Mean and Variance Normalization in the Model Domain

Ole Morten Strand, Andreas Egeberg

Norwegian University of Science and Technology, Trondheim, Norway

In prior work we have demonstrated the noise robustness of a novel microphone solution, the PARAT earplug communication terminal. Here we extend that work with results for the ETSI Advanced Front-End and segmental cepstral mean and variance normalization (CMVN). We also propose a method for doing CMVN in the model domain. This removes the need to train models on normalized features, which may significantly extend the applicability of CMVN. The recognition results are comparable to those of the traditional approach.


Full Paper

Bibliographic reference.  Strand, Ole Morten / Egeberg, Andreas (2004): "Cepstral mean and variance normalization in the model domain", In Robust2004, paper 38.