The importance of using between-session test data in evaluating the performance of forensic-voice-comparison systems
The importance of using between-session test data in evaluating the performance of forensic-voice-comparison systems
复制标题
使用会话间测试数据评估取证语音比较系统性能的重要性
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
G. Stewart
中科院分区：
文献类型：
--
作者：
Ewald Enzinger;G. Stewart
在本文中，我们报告了一项研究，该研究证明了使用非同期测试数据在评估法医语音比对系统中的有效性和可靠性方面的重要性。我们测试了四个不同的系统：一个MFCC GMM-UBM，一个基于元音共振峰轨迹的系统，一个基于鼻谱的系统，以及三个系统的融合。每个系统都在同一组测试录音上进行测试，包括相同的扬声器对和不同的扬声器对。在一种情况下，相同的说话者对来自同期(会话内)录音，而在另一种情况下，它们来自非同期(会话之间)录音。与会话间测试相比，会话内测试总是高估了系统的性能。
In this paper we report on a study which demonstrates the importance of using non-contemporaneous test data in evaluating the validity and reliability in forensic-voice-comparison systems. We test four different systems: one MFCC GMM–UBM, one vowel formant-trajectory based, one nasal spectra based, and the fusion of the three systems. Each system is tested on the same set of test recordings, including same-speaker and different-speaker pairs. In one condition, the same-speaker pairs are from contemporaneous (within-session) recordings and in the other they are from non-contemporaneous (betweensession) recordings. Within-session testing always overestimated the performance of the systems compared to betweensession testing.