An Approach to Off-talk Detection based on Text Classification within an Automatic Spoken Dialogue System

Oleg Akhtiamov, Roman Sergienko, Wolfgang Minker

2016

Abstract

This paper describes the problem of the off-talk detection within an automatic spoken dialogue system. The considered corpus contains realistic conversations between two users and an SDS. A two- (on-talk and off-talk) and a three-class (on-talk, problem-related off-talk, and irrelevant off-talk) problem statement are investigated using a speaker-independent approach to cross-validation. A novel off-talk detection approach based on text classification is proposed. Seven different term weighting methods and two classification algorithms are considered. As a dimensionality reduction method, a feature transformation based on term belonging to classes is applied. The comparative analysis of the proposed approach and a baseline one is performed; as a result, the best combinations of the text pre-processing methods and classification algorithms are defined for both problem statements. The novel approach demonstrates significantly better classification effectiveness in comparison with the baseline for the same task.

Paper Citation

in Harvard Style

Akhtiamov O., Sergienko R. and Minker W. (2016). An Approach to Off-talk Detection based on Text Classification within an Automatic Spoken Dialogue System . In Proceedings of the 13th International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO, ISBN 978-989-758-198-4, pages 288-293. DOI: 10.5220/0005977802880293

in Bibtex Style

@conference{icinco16,
author={Oleg Akhtiamov and Roman Sergienko and Wolfgang Minker},
title={An Approach to Off-talk Detection based on Text Classification within an Automatic Spoken Dialogue System},
booktitle={Proceedings of the 13th International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO,},
year={2016},
pages={288-293},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005977802880293},
isbn={978-989-758-198-4},
}

in EndNote Style

TY - CONF
JO - Proceedings of the 13th International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO,
TI - An Approach to Off-talk Detection based on Text Classification within an Automatic Spoken Dialogue System
SN - 978-989-758-198-4
AU - Akhtiamov O.
AU - Sergienko R.
AU - Minker W.
PY - 2016
SP - 288
EP - 293
DO - 10.5220/0005977802880293