Ciprian Chelba

Ciprian Chelba is a Research Scientist with Google. Previously he worked as a Researcher in the Speech Technology Group at Microsoft Research.

His research interests are in statistical modeling of natural language and speech. Recent projects include: Google Audio Indexing; indexing, ranking and snippeting of speech content; Language Modeling for Google Search by Voice, and Android IME predictive keyboard.

Google Publications

Empirical Exploration of Language Modeling for the google.com Query Stream as Applied to Mobile Voice Search

Ciprian Chelba, Johan Schalkwyk

Mobile Speech and Advanced Natural Language Solutions, Springer Science+Business Media, New York (2013), pp. 197-229
Large Scale Distributed Acoustic Modeling With Back-off N-grams

Ciprian Chelba, Peng Xu, Fernando Pereira, Thomas Richardson

ICSI, Berkeley, California (2013)
Large Scale Distributed Acoustic Modeling With Back-off N-grams

Ciprian Chelba, Peng Xu, Fernando Pereira, Thomas Richardson

IEEE Transactions on Audio, Speech and Language Processing, vol. 21 (2013), pp. 1158-1169
Speech and Natural Language: Where Are We Now And Where Are We Headed?

Ciprian Chelba

Mobile Voice Conference, San Francisco (2013)
Distributed Acoustic Modeling with Back-off N-grams

Ciprian Chelba, Peng Xu, Fernando Pereira, Thomas Richardson

Proceedings of ICASSP 2012, IEEE, pp. 4129-4132
Distributed Discriminative Language Models for Google Voice Search

Preethi Jyothi, Leif Johnson, Ciprian Chelba, Brian Strope

Proceedings of ICASSP 2012, IEEE, pp. 5017-5021
Language Modeling for Automatic Speech Recognition Meets the Web: Google Search by Voice

Ciprian Chelba, Johan Schalkwyk, Boulos Harb, Carolina Parada, Cyril Allauzen, Leif Johnson, Michael Riley, Peng Xu, Preethi Jyothi, Thorsten Brants, Vida Ha, Will Neveitt

University of Toronto (2012)
Large Scale Language Modeling in Automatic Speech Recognition

Ciprian Chelba, Dan Bikel, Maria Shugrina, Patrick Nguyen, Shankar Kumar

Google (2012)
Large-scale Discriminative Language Model Reranking for Voice Search

Preethi Jyothi, Leif Johnson, Ciprian Chelba, Brian Strope

Proceedings of the NAACL-HLT 2012 Workshop: Will We Ever Really Replace the N-gram Model? On the Future of Language Modeling for HLT, Association for Computational Linguistics, pp. 41-49
Optimal Size, Freshness and Time-frame for Voice Search Vocabulary

Maryam Kamvar, Ciprian Chelba

Google (2012)
Voice Query Refinement

Cyril Allauzen, Edward Benson, Ciprian Chelba, Michael Riley, Johan Schalkwyk

Interspeech (2012)
Language Modeling for Automatic Speech Recognition Meets the Web: Google Search by Voice

Ciprian Chelba, Johan Schalkwyk, Boulos Harb, Carolina Parada, Cyril Allauzen, Michael Riley, Peng Xu, Thorsten Brants, Vida Ha, Will Neveitt

OGI/OHSU Seminar Series, Portland, Oregon, USA (2011)
Speech Retrieval

Ciprian Chelba, Timothy J. Hazen, Bhuvana Ramabhadran, Murat Saraçlar

Spoken Language Understanding, John Wiley and Sons, Ltd (2011), pp. 417-446
Challenges in Automatic Speech Recognition

Ciprian Chelba, Johan Schalkwyk, Michiel Bacchiani

Interspeech 2010
Google Search by Voice: A Case Study

Johan Schalkwyk, Doug Beeferman, Francoise Beaufays, Bill Byrne, Ciprian Chelba, Mike Cohen, Maryam Garrett, Brian Strope

Advances in Speech Recognition: Mobile Environments, Call Centers and Clinics, Springer (2010), pp. 61-90
Model Combination for Machine Translation

John DeNero, Shankar kumar, Ciprian Chelba, Franz Och

Proceedings of the North American Chapter of the Association for Computational Linguistics (NAACL) (2010), pp. 975-983
Query Language Modeling for Voice Search

Ciprian Chelba, Johan Schalkwyk, Thorsten Brants, Vida Ha, Boulos Harb, Will Neveitt, Carolina Parada, Peng Xu

Proceedings of the 2010 IEEE Workshop on Spoken Language Technology, IEEE, pp. 127-132
Statistical Language Modeling

Ciprian Chelba

The Handbook of Computational Linguistics and Natural Language Processing, Wiley-Blackwell, John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, West Sussex, PO19 8SQ United Kingdom (2010), pp. 74-104
Study on Interaction between Entropy Pruning and Kneser-Ney Smoothing

Ciprian Chelba, Thorsten Brants, Will Neveitt, Peng Xu

Proceedings of Interspeech (2010), pp. 2242-2245
An Audio Indexing System for Election Video Material

Christopher Alberti, Michiel Bacchiani, Ari Bezman, Ciprian Chelba, Anastassia Drofa, Hank Liao, Pedro Moreno, Ted Power, Arnaud Sahuguet, Maria Shugrina, Olivier Siohan

Proceedings of ICASSP (2009), pp. 4873-4876
Back-off Language Model Compression

Boulos Harb, Ciprian Chelba, Jeffrey Dean, Sanjay Ghemawat

Proceedings of Interspeech 2009, International Speech Communication Association (ISCA), pp. 325-355
Retrieval and Browsing of Spoken Content

Ciprian Chelba, Timothy J. Hazen, Murat Saraçlar

Signal Processing Magazine, IEEE, vol. 25 (2008), pp. 39-49

Previous Publications

An audio indexing system for election video material

Christopher Alberti, Michiel Bacchiani, Ari Bezman, Ciprian Chelba, Anastassia Drofa, Hank Liao, Pedro Moreno, Ted Power, Arnaud Sahuguet, Maria Shugrina, Olivier Siohan

ICASSP (2009), pp. 4873-4876
Acoustic Sensitive Language Model Perplexity for Automatic Speech Recognition

Ciprian Chelba

Proceedings of Machine Learning Workshop, Snowbird, UT (2006)
Adaptation of Maximum Entropy Capitalizer: Little Data Can Help a Lot

Ciprian Chelba, Alex Acero

Computer Speech and Language, vol. 20 (2006), pp. 382-399
Integration of Metadata in Spoken Document Search Using Position Specific Posterior Lattices

Jorge Silva, Ciprian Chelba, Alex Acero

Proceedings of the IEEE International Workshop on Spoken Language Technology, IEEE, Palm Beach, Aruba (2006), to appear
Pruning Analysis of the Position Specific Posterior Lattices for Spoken Document Search

Jorge Silva Sanchez, Ciprian Chelba, Alex Acero

Proceedings of ICASSP'06, IEEE, Toulouse, France (2006), to appear
Soft Indexing of Speech Content for Search in Spoken Documents

Ciprian Chelba, Jorge Silva, Alex Acero

Computer Speech and Language (2006), pp. 458-478
Towards Spoken-Document Retrieval for the Internet: Lattice Indexing For Large-Scale Web-Search Architectures

Zheng-Yu Zhou, Peng Yu, Ciprian Chelba, Frank Seide

Proceedings of the Human Language Technology Conference of the NAACL, Main Conference, Association for Computational Linguistics, New York City, USA (2006), pp. 415-422
Indexing Uncertainty for Spoken Document Search

Ciprian Chelba, Alex Acero

Proceedings of Eurospeech, ISCA, Lisbon, Portugal (2005), pp. 61-64
Position Specific Posterior Lattices for Indexing Speech

Ciprian Chelba, Alex Acero

Proceedings of the 43rd Annual Meeting of the Association for Computational Linguistics (ACL'05), Association for Computational Linguistics, Ann Arbor, Michigan (2005), pp. 443-450
SPEECH OGLE: Indexing Uncertainty for Spoken Document Search

Ciprian Chelba, Alex Acero

Proceedings of the ACL Interactive Poster and Demonstration Sessions, Association for Computational Linguistics, Ann Arbor, Michigan (2005), pp. 41-44
Adaptation of Maximum Entropy Capitalizer: Little Data Can Help a Lot

Ciprian Chelba, Alex Acero

Proceedings of EMNLP, Barcelona, Spain (2004), pp. 285-292
Conditional Maximum Likelihood Estimation of Naive Bayes Probability Models

Ciprian Chelba, Alex Acero

Microsoft Research, Redmond, WA (2004)
Conditional Maximum Likelihood Estimation of Naive Bayes Probability Models Using Rational Function Growth Transform

Ciprian Chelba, Alex Acero

Proceedings of Machine Learning Workshop, Snowbird, UT (2004)
Parsing Conversational Speech Using Enhanced Segmentation

Jeremy G. Kahn, Mari Ostendorf, Ciprian Chelba

HLT-NAACL 2004: Short Papers, Association for Computational Linguistics, Boston, Massachusetts, USA, pp. 125-128
Discriminative Training of N-gram Classifiers for Speech and Text Routing

Ciprian Chelba, Alex Acero

Proceedings of Eurospeech 2003, Geneva, Switzerland, pp. 1-4
Speech Utterance Classification

C. Chelba, M. Mahajan, A. Acero

Proceedings of ICASSP, Hong Kong (2003), pp. 280-283
A Study on Richer Syntactic Dependencies for Structured Language Modeling

Peng Xu, Ciprian Chelba, Frederick Jelinek

ACL, http://www.aclweb.org/ (2002), pp. 191-198
Growth Transform for Conditional Maximum Likelihood Estimation of Log-linear Models

Milind Mahajan, Ciprian Chelba

Microsoft Research, Redmond, WA (2002)
Mutual Information Phone Clustering for Decision Tree Induction

C. Chelba, R. Morton

Proc. Int. Conf. on Spoken Language Processing, Denver, Colorado (2002)
Information Extraction Using the Structured Language Model

Ciprian Chelba, Milind Mahajan

Proceedings of EMNLP, Pittsburgh, Pennsylvania (2001), pp. 74-81
Portability of Syntactic Structure for Language Modeling

Ciprian Chelba

Proceedings of the IEEE International Conference on Audio, Speech and Signal Processing Conference, IEEE, www.ieee.org (2001)
Richer Syntactic Dependencies for Structured Language Modeling

C. Chelba, P. Xu

Proc. of the IEEE Workshop on Automatic Speech Recognition and Understanding, Madonna di Campiglio, Italy (2001)
Exploiting Syntactic Structure for Natural Language Modeling

Ciprian Chelba

The Johns Hopkins University, www.jhu.edu (2000)
Structured Language Modeling

Ciprian Chelba, Frederick Jelinek

Computer Speech and Language, vol. 14 (2000), pp. 283-332
Putting Language into Language Modeling

Frederick Jelinek, Ciprian Chelba

Proceedings of Eurospeech'99, Budapest, Hungary (1999)
Recognition performance of a structured language model

C. Chelba, F. Jelinek

Proceedings of Eurospeech, Budapest, Hungary (1999)
Structured Language Modeling for Speech Recognition

Ciprian Chelba, Frederick Jelinek

Proceedings of NLDB (1999)
Exploiting Syntactic Structure for Language Modeling

Ciprian Chelba, Frederick Jelinek

Proceedings of COLING-ACL (1998), pp. 225-231
Refinement of a Structured Language Model

Ciprian Chelba, Frederick Jelinek

Proceedings of ICAPR (1998)
A Structured Language Model

Ciprian Chelba

Proceedings of ACL-EACL, Madrid, Spain (1997), 498-500,student section
Structure and Performance of a Dependency Language Model

C. Chelba, D. Engle, F. Jelinek, V. Jimenez, S. Khudanpur, L. Mangu, H. Printz, E. S. Ristad, R. Rosenfeld, A. Stolcke, D. Wu

Proceedings of Eurospeech, Rhodes, Greece (1997), pp. 2775-2778

Ciprian Chelba

Co-Authors

Google Publications

Previous Publications