Abstract
This paper presents the design of an anomaly detector based on three different sets of features, one corresponding to some prosodic descriptors and two extracted from Big Five traits. Big Five traits correspond to a simple but efficient representation of a human personality. They are extracted from a manual annotation while prosodic features are extracted directly from the speech signal. We evaluate two different anomaly detection methods: One-Class SVM (OC-SVM) and iForest, each one combined with a threshold classification to decide the “normality” of a sample. The different combinations of models and feature sets are evaluated on the SSPNET-Personality corpus which has already been used in several experiments, including a previous work on separating two types of personality profiles in a supervised way. In this work, we propose the above mentioned unsupervised methods, and discuss their performance, to detect particular audio-clips produced by a speaker with an abnormal personality. Results show that using automatically extracted prosodic features competes with the Big Five traits. In our case, OC-SVM seems to get better results than iForest.
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This research has been financially supported by the French Ministry of Defense - Direction Générale pour l’Armement and the région Bretagne (ARED) under the MAVOFA project.
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Fayet, C., Delhay, A., Lolive, D., Marteau, PF. (2017). First Experiments to Detect Anomaly Using Personality Traits vs. Prosodic Features. In: Karpov, A., Potapova, R., Mporas, I. (eds) Speech and Computer. SPECOM 2017. Lecture Notes in Computer Science(), vol 10458. Springer, Cham. https://doi.org/10.1007/978-3-319-66429-3_37
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DOI: https://doi.org/10.1007/978-3-319-66429-3_37
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