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Mathematical Problems in Engineering
Volume 2013, Article ID 265819, 9 pages
Research Article

Practical Speech Emotion Recognition Based on Online Learning: From Acted Data to Elicited Data

School of Information Science and Engineering, Southeast University, Nanjing 210096, China

Received 7 March 2013; Revised 26 May 2013; Accepted 4 June 2013

Academic Editor: Saeed Balochian

Copyright © 2013 Chengwei Huang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We study the cross-database speech emotion recognition based on online learning. How to apply a classifier trained on acted data to naturalistic data, such as elicited data, remains a major challenge in today’s speech emotion recognition system. We introduce three types of different data sources: first, a basic speech emotion dataset which is collected from acted speech by professional actors and actresses; second, a speaker-independent data set which contains a large number of speakers; third, an elicited speech data set collected from a cognitive task. Acoustic features are extracted from emotional utterances and evaluated by using maximal information coefficient (MIC). A baseline valence and arousal classifier is designed based on Gaussian mixture models. Online training module is implemented by using AdaBoost. While the offline recognizer is trained on the acted data, the online testing data includes the speaker-independent data and the elicited data. Experimental results show that by introducing the online learning module our speech emotion recognition system can be better adapted to new data, which is an important character in real world applications.