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首页> 外文会议>IEEE International Workshop on Information Forensics and Security >Testing the validity and reliability of forensic voice comparison based on reassigned time-frequency representations of Chinese /iau/
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Testing the validity and reliability of forensic voice comparison based on reassigned time-frequency representations of Chinese /iau/

机译：重新分配中文/ iau /的时频表示，测试法医语音比较的有效性和可靠性

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Time-frequency reassigned representations of vowel segments have repeatedly been proposed as features for performing forensic voice comparison (FVC). Combined with a thresholding on the second-order mixed partial derivative of the short-time Fourier transform (STFT) phase to reduce artifacts and noise (pruning) such representations offer a sharpened representation of AM/FM components in the speech signal. We test the validity and reliability of FVC systems based on pruned reassigned time-frequency representations extracted from manually labeled /iau/ segments from a database of voice recordings of 60 female Chinese speakers. Logistic-regression fusion was used to combine the systems with a baseline MFCC GMM-UBM system. Performance was assessed as degree of improvement over the baseline system. Three recording channel conditions were tested: high-quality v high-quality, mobile-to-landline v mobile-to-landline, and mobile-to-landline v high-quality. For the latter two conditions improvements over the baseline system were observed in terms of validity, but with decreases in reliability.
机译：重复提出了元音片段的时频重分配表示，作为执行法医语音比较（FVC）的功能。结合对短时傅立叶变换（STFT）相位的二阶混合偏导数进行阈值处理，以减少伪像和噪声（修剪），此类表示可提供语音信号中AM / FM分量的清晰表示。我们基于修剪后的重新分配的时频表示来测试FVC系统的有效性和可靠性，该时频表示是从60名女性中国女性的语音记录数据库中手动标记的/ iau /片段中提取的。使用逻辑回归融合将系统与基线MFCC GMM-UBM系统组合在一起。将性能评估为相对于基准系统的改进程度。测试了三个记录通道条件：高质量v高质量，移动到固定电话v移动到固定电话和移动到固定电话v高质量。对于后两种情况，在有效性方面观察到了相对于基线系统的改善，但是可靠性降低了。

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