Open Positions

Publications:  Speech and Language   Medicine and Health   Miscellaneous

Speech and Language

• Discriminative Joint Modeling of Lexical Variation and Acoustic Confusion for Automated Narrative Retelling Assessment, Maider Lehr, Izhak Shafran, Emily Prud’hommeaux and Brian Roark, Proc. NAACL, 2013.
• Parsimonious Multivariate Copula Model for Density Estimation, Alireza Bayestehtashk and Izhak Shafran, Proc. IEEE ICASSP, 2013.
• Robust Detection of Voiced Segments in Samples of Everyday Conversations Using Unsupervised HMMs, Meysam Asgari, Izhak Shafran and Alireza Bayestehtashk, Proc. IEEE Spoken Language Technology (SLT), 2012.
• Hello, Who is Calling?: Can Words Reveal the Social Nature of Conversations?, Anthony Stark, Izhak Shafran and Jeffrey Kaye, Proc. Conference of the North American Chapter of the Association for Computational Linguistics and Human Language Technology (NAACL/HLT), 2012.
• Fully Automated Neuropsychological Assessment for Detecting Mild Cognitive Impairment, Maider Lehr, Emily Prud'hommeaux, Izhak Shafran and Brian Roark, Proc. Interspeech, 2012.
• Deriving conversation-based features from unlabeled speech for discriminative language modeling, D.Karakos, B.Roark, I.Shafran, K.Sagae, M.Lehr, E.Prud'hommeaux, P.Xu, N.Glenn, S.Khudanpur, M.Saraclar, D.Bikel, M.Dredze, C.Callison-Burch, Y.Cao, K.Hall, E.Hasler, P.Koehn, A.Lopez, M.Post, and D.Riley, Proc. Interspeech, 2012.
• Interspeech Pathology Challenge: Investigations into Speaker and Sentence Specific Effects, Anthony Stark, Alireza Bayestehtashk, Meysam Asgari and Izhak Shafran, Proc. Interspeech, 2012.
• Hallucinated N-best Lists for Discriminative Language Modeling, K.Sagae, M.Lehr, E.Prud'hommeaux, P.Xu, N.Glenn, D.Karakos, S.Khudanpur, B.Roark, M.Saraclar, I.Shafran, D.Bikel, C.Callison-Burch, Y.Cao, K.Hall, E.Hasler, P.Koehn, A.Lopez, M.Post, and D.Riley, ICASSP, 2012.
• Continuous Space Discriminative Language Modeling, P.Xu, S.Khudanpur, M.Lehr, E.Prud'hommeaux, N.Glenn, D.Karakos, B.Roark, K.Sagae, M.Saraclar, I.Shafran, D.Bikel, C.Callison-Burch, Y.Cao, K.Hall, E.Hasler, P.Koehn, A.Lopez, M.Post, and D.Riley, ICASSP, 2012.
• Semi-supervised Discriminative Language Modeling for Turkish ASR, A.Celeba, H.Sak, E.Dikici, M.S M.Saraclar, M.Lehr, E.Prud'hommeaux, P.Xu, N.Glenn, D.Karakos, S.Khudanpur, B.Roark, K.Sagae, I.Shafran, D.Bikel, C.Callison-Burch, Y.Cao, K.Hall, E.Hasler, P.Koehn, A.Lopez, M.Post, and D.Riley, ICASSP, 2012.
• Supervised and Unsupervised Feature Selection for Inferring Social Nature of Telephone Conversations from Their Content, Anthony Stark, Izhak Shafran and Jeffrey Kaye, Proc. Automatic Speech Recognition and Understanding, 2011.
• Efficient Determinization of Tagged Word Lattices using Categorial and Lexicographic Semirings, Izhak Shafran, Richard Sproat, Mahsa Yarmohammadi and Brian Roark, Proc. Automatic Speech Recognition and Understanding, 2011.
• Lexicographic Semirings for Exact Automata Encoding of Sequence Models, Brian Roark, Richard Sproat and Izhak Shafran, Best Short Paper Award, ACL 2011.
• Learning a Discriminative Weighted Finite-State Transducer for Speech Recognition, Maider Lehr and Izhak Shafran, IEEE Transaction on Audio, Speech and Language Processing, vol. 19, no 5, pp. 1360--1367, July 2011.
• Discriminatively Estimated Joint Acoustic, Duration and Language Model for Speech Recognition, Maider Lehr and Izhak Shafran, Proc. ICASSP, 2nd Best Student Paper Award (ASR), 2010.
• Syntactic and Sub-lexical Features for Turkish Discriminative Language Models, Ebru Arisoy, Murat Saraclar, Brian Roark, and Izhak Shafran, Proc. ICASSP, 2010.
• Classifying clear and conversational speech based on acoustic features, Akiko Amano-Kusumoto, John-Paul Hosom, and Izhak Shafran, Proc. Interspeech, 2009.
• Discriminative N-gram Language Modeling for Turkish, Ebru Arisoy, Brian Roark, Izhak Shafran and Murat Saraclar, Proc. Interspeech, pages 825-28, Brisbane, Australia, Sept. 22-26, 2008.
• Multiple Heteroscedastic Linear Discriminant Analysis, Izhak Shafran and Haolang Zhou, CLSP Research Note 54, draft.
• Exploiting Prosody for PCFGs with Latent Annotations, Markus Dreyer and Izhak Shafran, Proc. Interspeech, Aug. 27-31, Antwerp, Belgium, 2007.
• The SRI/OGI 2006 Spoken Term Detection System, Dimitra Vergyri, Izhak Shafran, Andreas Stolcke, Ramana R. Gadde, Murat Akbacak, Brian Roark, and Wen Wang, Proc. Interspeech 2007, Aug. 27-31, Antwerp, Belgium, 2007.
• Multi-Stream Fusion for Speaker Classification (chapter), Izhak Shafran, Speaker Classification (Lecture notes in Computer Science and Artificial Intelligence), Springer, Heidelberg-Berlin-New York, vol. 4343, 2007.
• Overview of the CLEF- 2006 cross-language speech retrieval track, Douglas W. Oard, Jianqiang Wang, Gareth J. F. Jones, Ryan W. White, Pavel Pecina, Dagobert Soergel, Xiaoli Huang, and Izhak Shafran, In Working Notes of the CLEF-2006 Evaluation, Alicante, Spain, 12 pages, 2006.
• Corrective Models for Speech Recognition of Inflected Languages, Izhak Shafran, and Keith Hall, Proc. of the Conference on Empirical Methods in Natural Language Processing (EMNLP), pages 390-8, Sydney, Australia, July 22-23, 2006.
• PCFGs with Syntactic and Prosodic Indicators of Speech Repairs , John Hale, Izhak Shafran, Lisa Yung, Bonnie Dorr, Mary Harper, Anna Krasnyanskaya, Mathew Lease, Yang Liu, Brian Roark, Mathew Snover, and Robin Stewart, Proc. of the joint conference of the International Committee on Computational Linguistics and the Association for Computational Linguistics (COLING/ACL), pages 161-8, Sydney, Australia, July 17-21, 2006.
• Discriminative classifiers for language recognition, Christopher White, Izhak Shafran, and Jean-luc Gauvain, Proc. of IEEE Int'l Conference on Acoustic Signal and Speech Processing (ICASSP), vol 1, pages 213-6, Toulouse, France, May 14-19, 2006.
• Reranking for sentence boundary detection in conversational speech, Brian Roark, Yang Liu, Mary Harper, Robin Stewart, Mathew Lease, Mathew Snover, Izhak Shafran, Bonnie Dorr, John Hale, Anna Krasnyanskaya, and Lisa Yung, Proc. of IEEE Int'l Conference on Acoustic Signal and Speech Processing (ICASSP), vol 1, pages 545-8, Toulouse, France, May 14-19, 2006.
• SParseval: Evaluation Metrics for Parsing Speech, Brian Roark, Mary Harper, Eugene Charniak, Bonnie Dorr, Mark Johnson, Jeremy G. Kahn, Yang Liu, Mari Ostendorf, John Hale, Anna Krasnyanskaya, Matthew Lease, Izhak Shafran, Matthew Snover, Robin Stewart, and Lisa Yung, Proc. Language Resources and Evaluation (LREC), Genoa, Italy, 2006.
• Acoustic and Language Modeling for MALACH Czech ASR System, Izhak Shafran, CLSP Research Note No. 52, The Johns Hopkins University, 2006.
• Accent Detection and Speech Recognition for Shanghai-Accented Mandarin, Yanli Zheng, Richard Sproat, Liang Gu, Izhak Shafran, Haolang Zhou, Yi Su, Dan Jurafsky, Rebecca Starr and Su-Youn Yoon,9th European Conference on Speech Communication and Technology (Eurospeech), Lisboa, Portugal, 2005.
• A comparison of classifiers for detecting emotion from speech, Izhak Shafran and Mehryar Mohri, Proc. of IEEE Int'l Conference on Acoustic Signal and Speech Processing (ICASSP), Philadelphia, PA, Mar 19-23, vol. 1, pp. 341-344, 2005.
• Task-Specific Minimum Bayes-Risk Decoding using Learned Edit Distance, Izhak Shafran and William Byrne, Proc. of INTERSPEECH2004-ICSLP, vol. 3, pp. 1945-48, Jeju Islands, Korea, Oct. 4-8, 2004.
• Voice Signatures, Izhak Shafran, Michael Riley and Mehryar Mohri, Proc. of IEEE Automatic Speech Recognition and Understanding Workshop (ASRU), US Virgin Islands, Nov 30-Dec 4, pp. 31-36, 2003.
• Robust Speech Detection and Segmentation for Real-Time ASR Applications, Izhak Shafran and Richard Rose, Proc. of IEEE Int'l Conference on Acoustic Signal and Speech Processing (ICASSP), vol. 1, pp. 432-45, Hong Kong, 2003.
• Prosody Models for Conversational Speech Recognition, Mari Ostendorf, Izhak Shafran and Rebecca Bates, Proc. of the 2nd Plenary Meeting and Symposium on Prosody and Speech Processing, Invited Paper, pp. 147-154, 2003.
• Acoustic model clustering based on syllable structure, Izhak Shafran and Mari Ostendorf, Computer Speech and Language, vol. 17(4), pg. 311-328, 2003.
• Prosody and phonetic variability: Lessons learned from acoustic model clustering, Izhak Shafran, Mari Ostendorf and Richard Wright, Proc. ISCA Tutorial and Research Workshop on Prosody in Speech Recognition and Understanding, pg. 127--131, 2001.
• A prosodically labeled database of spontaneous speech, Mari Ostendorf, Izhak Shafran, Stefanie Shattuck-Hufnagel, Leslie Carmichael and William Byrne, Proc. ISCA Tutorial and Research Workshop on Prosody in Speech Recognition and Understanding, pg. 119--121, 2001.
• Use of higher level linguistic structure in acoustic modeling for speech recognition, Izhak Shafran and Mari Ostendorf, Proc. IEEE Int'l Conference on Acoustic Signal and Speech Processing (ICASSP), vol. 2, pg. 1021-1024, Istanbul, Turkey, Jun 5-9, 2000.
• Clustering wide-contexts and HMM topologies for Spontaneous Speech Recognition, Izhak Shafran, Ph.D. Thesis, University of Washington, Seattle, 2001.