Lexico-acoustic Neural-based Models for Dialog Act Classification
Recent works have proposed neural models for dialog act classification in spoken dialogs. However, they have not explored the role and the usefulness of acoustic information. We propose a neural model that processes both lexical and acoustic features for classification. Our results on two benchmark datasets reveal that acoustic features are helpful in improving the overall accuracy. Finally, a deeper analysis shows that acoustic features are valuable in three cases: when a dialog act has sufficient data, when lexical information is limited and when strong lexical cues are not present.
- Pub Date:
- March 2018
- Computer Science - Computation and Language
- 5 pages, 1 figure, 2018 International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2018)