Please use this identifier to cite or link to this item:
http://hdl.handle.net/10071/25216
Author(s): | Julião, M. Silva, J. Aguiar, A. Moniz, H. Batista, F. |
Editor: | José Luis Sierra Rodríguez, José Paulo Leal, Alberto Simões |
Date: | 2015 |
Title: | Speech features for discriminating stress using branch and bound wrapper search |
ISBN: | 978-84-606-8762-7 |
Keywords: | Stress Emotion recognition Ecological data Feature sets Feature selection |
Abstract: | Stress detection from speech is a less explored field than Automatic Emotion Recognition and it is still not clear which features are better stress discriminants. VOCE aims at doing speech classification as stressed or not-stressed in real-time, using acoustic-prosodic features only. We therefore look for the best discriminating feature subsets from a set of 6285 features – 6125 features extracted with openSMILE toolkit and 160 Teager Energy Operator (TEO) features. We use a mutual information filter and a branch and bound wrapper heuristic with an SVM classifier to perform feature selection. Since many feature sets are selected, we analyse them in terms of chosen features and classifier performance concerning also true positive and false positive rates. The results show that the best feature types for our application case are Audio Spectral, MFCC, PCM and TEO. We reached results as high as 70.36% for generalisation accuracy |
Peerreviewed: | yes |
Access type: | Open Access |
Appears in Collections: | IT-CRI - Comunicações a conferências internacionais |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
conferenceobject_28004.pdf | Versão Aceite | 284,09 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.