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arXiv 2004.06422eess.AScs.SD
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自动话者确认中的常Q倒谱系数欺骗对策的可解释性研究

An explainability study of the constant Q cepstral coefficient spoofing countermeasure for automatic speaker verification

EURECOM(欧洲通信研究与教育中心)

Hemlata Tak, Jose Patino, Andreas Nautsch, Nicholas Evans, Massimiliano Todisco

摘要:

自动说话人验证的反欺骗现在是一个成熟的研究领域,在过去的6年里举行了三次竞争性挑战。在这段时间里,大量的研究工作已经投入到针对欺骗检测任务的前端表示的开发中。一种被称为恒定Q倒谱系数(CQCC)的这样的方法已经被证明在检测利用基于单元选择的语音合成算法实现的攻击中特别有效。尽管他们取得了成功,但他们在检测其他形式的欺骗攻击时基本上失败了,在这些攻击中,更传统的前端表示会提供更好的结果。在最近的2019年版ASVspoof挑战系列中也观察到了类似的差异。本文报告了我们试图帮助解释这些观察结果。的解释是在于由每个前端支付的频谱的不同子带分量的关注程度。到目前为止,令人惊讶的是,很少有人知道什么样的文物被检测到的欺骗对策。因此,我们的工作旨在阐明信号或频谱级的文物,用于区分不同形式的欺骗攻击,从真正的,真正的语音。通过更好地了解这些人工制品,我们将更好地设计更可靠的对策。

英文摘要:

Anti-spoofing for automatic speaker verification is now a well established area of research, with three competitive challenges having been held in the last 6 years. A great deal of research effort over this time has been invested into the development of front-end representations tailored to the spoofing detection task. One such approach known as constant Q cepstral coefficients (CQCCs) have been shown to be especially effective in detecting attacks implemented with a unit selection based speech synthesis algorithm. Despite their success, they largely fail in detecting other forms of spoofing attack where more traditional front-end representations give substantially better results. Similar differences were also observed in the most recent, 2019 edition of the ASVspoof challenge series. This paper reports our attempts to help explain these observations. The explanation is shown to lie in the level of attention paid by each front-end to different sub-band components of the spectrum. Thus far, surprisingly little has been learned about what artefacts are being detected by spoofing countermeasures. Our work hence aims to shed light upon signal or spectrum level artefacts that serve to distinguish different forms of spoofing attack from genuine, bone fide speech. With a better understanding of these artefacts we will be better positioned to design more reliable countermeasures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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