@InProceedings{Mittelhammer2016_336,
author = {Katharina Mittelhammer and Uwe D. Reichel},
booktitle = {Studientexte zur Sprachkommunikation: Elektronische Sprachsignalverarbeitung 2016},
title = {Characterization and Prediction of Dialogue Acts Using Prosodic Features},
year = {2016},
editor = {Oliver Jokisch},
month = mar,
pages = {160--167},
publisher = {TUDpress, Dresden},
abstract = {This study investigates the classification of dialogue acts using prosodic
features. Prosodic elements contain information about the type of dialogue acts.
For this reason they can be used to increase the performance of speech recognition
and speech synthesis systems. In the present study, two feature sets and two clas-
sifiers were compared. The first feature set comprised standard prosodic features,
namely the F0 arithmetic mean, and its standard deviation. The overall dialogue
act related F0 mean values support Ohala’s Frequency Code hypothesis. For the
second feature set, intonation features accounting for F0 shapes were derived by
polynomial intonation stylization. To compare the usability of both feature sets for
classification, the sample of dialogue acts was classified using k-nearest neighbor
and random tree classifiers. For both feature sets and classifiers accuracies around
77% were achieved. We found no significant difference between the classifiers and
feature sets. One can conclude that standard F0 features already contain a rea-
sonable amount of information about dialogue acts, and that a more elaborated F0
analysis is not beneficial for the given data.},
isbn = {978-3-959080-40-8},
issn = {0940-6832},
keywords = {Phonetik und Prosodie},
url = {https://www.essv.de/pdf/2016_160_167.pdf},
}