Post-error Correction in Automatic Speech Recognition Using Discourse Information

• Main Authors: KANG, S., KIM, J.-H., SEO, J.
• Format: Article
• Language: English
• Published: Stefan cel Mare University of Suceava 2014-05-01
• Series: Advances in Electrical and Computer Engineering
• Subjects: post correction; speech recognition; re-ranking model; analysis of user intention; spoken language understanding; spoken dialog system
• Online Access: http://dx.doi.org/10.4316/AECE.2014.02009
• ISSN: 1582-7445; 1844-7600

Overcoming speech recognition errors in the field of human�computer interaction is important in ensuring a consistent user experience. This paper proposes a semantic-oriented post-processing approach for the correction of errors in speech recognition. The novelty of the model proposed here is that it re-ranks the n-best hypothesis of speech recognition based on the user's intention, which is analyzed from previous discourse information, while conventional automatic speech recognition systems focus only on acoustic and language model scores for the current sentence. The proposed model successfully reduces the word error rate and semantic error rate by 3.65% and 8.61%, respectively.