Learning Sub-Word Units for Open Vocabulary Speech Recognition Carolina Parada author Mark Dredze author Abhinav Sethy author Ariya Rastrow author 2011-06 text Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies Dekang Lin editor Yuji Matsumoto editor Rada Mihalcea editor Association for Computational Linguistics Portland, Oregon, USA conference publication parada-etal-2011-learning https://aclanthology.org/P11-1072/ 2011-06 712 721