Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The SYSU System for the Interspeech 2015 Automatic Speaker Verification
  Spoofing and Countermeasures Challenge   Many existing speaker verification systems are reported to be vulnerable
against different spoofing attacks, for example speaker-adapted speech
synthesis, voice conversion, play back, etc. In order to detect these spoofed
speech signals as a countermeasure, we propose a score level fusion approach
with several different i-vector subsystems. We show that the acoustic level
Mel-frequency cepstral coefficients (MFCC) features, the phase level modified
group delay cepstral coefficients (MGDCC) and the phonetic level phoneme
posterior probability (PPP) tandem features are effective for the
countermeasure. Furthermore, feature level fusion of these features before
i-vector modeling also enhance the performance. A polynomial kernel support
vector machine is adopted as the supervised classifier. In order to enhance the
generalizability of the countermeasure, we also adopted the cosine similarity
and PLDA scoring as one-class classifications methods. By combining the
proposed i-vector subsystems with the OpenSMILE baseline which covers the
acoustic and prosodic information further improves the final performance. The
proposed fusion system achieves 0.29% and 3.26% EER on the development and test
set of the database provided by the INTERSPEECH 2015 automatic speaker
verification spoofing and countermeasures challenge.

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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph