ISCA Archive Interspeech 2008
ISCA Archive Interspeech 2008

Acoustic-phonetic approach for automatic evaluation of spoken grammar

Om D. Deshmukh, Ashish Verma

Evaluating spoken grammar skills is an important component of evaluating the overall spoken English skills of a candidate. This paper presents a novel approach that incorporates the knowledge of acoustic-phonetics to improve the performance of an existing spoken grammar evaluation technique in a question-answer paradigm. A novel acoustic parameter, Onset Coherence, to make a one-pass distinction between the onsets of fricatives, stops and vowels is also proposed. The performance of the proposed approach is evaluated against human labeled data obtained from real-life spoken grammar assessment tests. The proposed approach of combining the knowledge from the acoustic-phonetic domain with the information obtained from the automatic speech recognition system leads to an improvement of 8.2% in utterance-level classification.


doi: 10.21437/Interspeech.2008-648

Cite as: Deshmukh, O.D., Verma, A. (2008) Acoustic-phonetic approach for automatic evaluation of spoken grammar. Proc. Interspeech 2008, 2614-2617, doi: 10.21437/Interspeech.2008-648

@inproceedings{deshmukh08b_interspeech,
  author={Om D. Deshmukh and Ashish Verma},
  title={{Acoustic-phonetic approach for automatic evaluation of spoken grammar}},
  year=2008,
  booktitle={Proc. Interspeech 2008},
  pages={2614--2617},
  doi={10.21437/Interspeech.2008-648}
}