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Speaker recognition from encrypted VoIP communications

机译:通过加密的VoIP通信识别说话者

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摘要

Most of the voice over IP (VoIP) traffic is encrypted prior to its transmission over the Internet. This makes the identity tracing of perpetrators during forensic investigations a challenging task since conventional speaker recognition techniques are limited to unencrypted speech communications. In this paper, we propose techniques for speaker identification and verification from encrypted VoIP conversations. Our experimental results show that the proposed techniques can correctly identify the actual speaker for 70-75% of the time among a group of 10 potential suspects. We also achieve more than 10 fold improvement over random guessing in identifying a perpetrator in a group of 20 potential suspects. An equal error rate of 17% in case of speaker verification on the CSLU speaker recognition corpus is achieved.
机译:IP语音(VoIP)流量中的大多数都经过加密,然后再通过Internet传输。由于常规的说话人识别技术仅限于未加密的语音通信,因此在法医调查期间追踪犯罪者的身份成为一项艰巨的任务。在本文中,我们提出了从加密的VoIP对话中进行说话人识别和验证的技术。我们的实验结果表明,所提出的技术可以在10名潜在犯罪嫌疑人中正确识别出说话者的70-75%的时间。在确定20名潜在犯罪嫌疑人中的犯罪者时,我们还比随机猜测提高了10倍以上。如果在CSLU说话人识别语料库上进行说话人验证,则错误率达到17%。

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