Graduate School and Research Center in Digital Sciences

Constant Q cepstral coefficients: A spoofing countermeasure for automatic Speaker verification

Todisco, Massimiliano; Delgado, Héctor; Evans, Nicholas

Computer Speech & Language, 20 February 2017

Recent evaluations such as ASVspoof 2015 and the similarly-named AVspoof have stimulated a great deal of progress to develop spoofing countermeasures for automatic speaker verification. This paper reports an approach which combines speech signal analysis using the constant Q transform with traditional cepstral processing. The resulting constant Q cepstral coefficients (CQCCs) were introduced recently and have proven to be an effective spoofing countermeasure. An extension of previous work, the paper reports an assessment of CQCCs generalisation across three different databases and shows that they deliver state-of-the-art performance in each case. The benefit of CQCC features stems from a variable spectro-temporal resolution which, while being fundamentally different to that used by most automatic speaker verification system front-ends, also captures reliably the tell-tale signs of manipulation artefacts which are indicative of spoofing attacks. The second contribution relates to a cross-database evaluation. Results show that CQCC configuration is sensitive to the general form of spoofing attack and use case scenario. This finding suggests that the past single-system pursuit of generalised spoofing detection may need rethinking.

Document Doi Bibtex

Title:Constant Q cepstral coefficients: A spoofing countermeasure for automatic Speaker verification
Keywords:Spoofing; countermeasures; Presentation attack detection; Automatic speaker verification; Constant Q transform; Cepstral analysis
Department:Digital Security
Eurecom ref:5146
Copyright: © Elsevier. Personal use of this material is permitted. The definitive version of this paper was published in Computer Speech & Language, 20 February 2017 and is available at :
Bibtex: @article{EURECOM+5146, doi = {}, year = {2017}, month = {02}, title = {{C}onstant {Q} cepstral coefficients: {A} spoofing countermeasure for automatic {S}peaker verification}, author = {{T}odisco, {M}assimiliano and {D}elgado, {H}{\'e}ctor and {E}vans, {N}icholas}, journal = {{C}omputer {S}peech \& {L}anguage, 20 {F}ebruary 2017}, url = {} }
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