IMPRESS Lab | PEOPLE

Wooil Kim

Research Interests

1. Speech Processing/Recognition
- large vocabulary continuous speech recognition system
- environmental robust processing for ASR, missing-feature theory

2. Human Behavior Signal Processing
- in-vehicle human interface, robust speech recognition for in-vehicle system
- human emotion processing, signal processing/estimation under cognitive stress/distraction

3. Information Retrieval System
- multimedia/music information retrieval, spoken document retrieval (SpeechFind)
- keyword spotting/detection, data mining, dialog system

4. Statistical Signal Processing, Pattern Recognition, Neural Network

Education and Experiences

1. Experiences
Associate Professor, CSE, University of Incheon, Korea, Oct.2016-Present
Assistant Professor, CSE, University of Incheon, Korea, Aug.2012-Sept.2016
Research Assistant Professor, EE, University of Texas at Dallas, Sept.2007-Aug.2012
Research Associate, EE, University of Texas at Dallas, Sept.2005-Aug.2007
  -Supervised by Prof. John H. L. Hansen
Post-doctoral Researcher, ECE, Carnegie Mellon University, Sept.2004-Aug.2005
  -KOSEF program, supervised by Prof. Richard M. Stern
Post-doctoral Researcher, EE, Korea University, Sept.2003-Aug.2004
  -BK21 program, supervised by Prof. Hanseok Ko

2. Education
Ph.D., Electronics Engineering, Korea University, Seoul, Korea, Aug. 2003
  -Thesis: Model-based Feature Compensation for Robust Speech Recognition in Adverse Environments [link]
  -Advised by Prof. Hanseok Ko
M.S., Electronics Engineering, Korea University, Seoul, Korea, Aug. 1998
  -Thesis: Spectral Subtraction based on Phonemic and Auditory Properties [link]
  -Advised by Prof. Hanseok Ko
B.S., Electronics Engineering, Korea University, Seoul, Korea, Feb. 1996

Publications

1. Journal Papers
[1] Wooil Kim and J.H.L. Hansen, "A Novel Mask Estimation Method Employing Posterior-Based Representative Mean Estimate for Missing-Feature Speech Recognition," IEEE Transactions on Audio, Speech, and Language Processing, vol.19, no.5, pp.1434-1443, July 2011. [link]
[2] J.H.L. Hansen, Wooil Kim, M. Rahurkar, E. Ruzanski, and J. Meyerhoff, "Robust Emotional Stressed Speech Detection Using Weighted Frequency Subbands," EURASIP Journal on Advances in Signal Processing, vol. 2011, Article ID 906789, 10 pages, 2011 (doi:10.1155/2011/906789). [link]
[3] Wooil Kim and J.H.L. Hansen, "Variational Noise Model Composition Through Model Perturbation for Robust Speech Recognition with Time-Varying Background Noise," Speech Communication, vol.53, no.4, pp.451-464, April 2011. [link]
[4] Wooil Kim and R.M. Stern, "Mask Classification for Missing-Feature Reconstruction for Robust Speech Recognition with Unknown Background Noise," Speech Communication, vol.53, no.1, pp.1-11, Jan. 2011. [link]
[5] Wooil Kim and J.H.L. Hansen, "Missing-Feature Reconstruction by Leveraging Temporal Spectral Correlation for Robust Speech Recognition in Background Noise Conditions," IEEE Transactions on Audio, Speech, and Language Processing, vol.18, no.8, pp.2111-2120, Nov. 2010. [link]
[6] J.H.L. Hansen, S.S. Gray, and Wooil Kim, "Automatic Voice Onset Time Detection for Unvoiced Stops (/p/,/t/,/k/) with Application to Accent Classification," Speech Communication, vol.52, no.10, pp.777-789, Oct, 2010. [link]
[7] Wooil Kim and J.H.L. Hansen, "Phonetic Distance Based Confidence Measure," IEEE Signal Processing Letters, vol.17, no.2, pp.117-120, Feb. 2010. [link]
[8] Wooil Kim and J.H.L. Hansen, "Time-Frequency Correlation Based Missing-Feature Reconstruction for Robust Speech Recognition in Band-Restricted Conditions," IEEE Transactions on Audio, Speech, and Language Processing, vol.17, no.7, pp.1292-1304, Sept. 2009. [link]
[9] Wooil Kim and J.H.L. Hansen, "Feature Compensation in the Cepstral Domain Employing Model Combination," Speech Communication, vol.51, no.2, pp.83-96, Feb. 2009. [link]
[10] Wooil Kim and J.H.L. Hansen, "Feature Compensation Employing Multiple Environmental Models for Robust In-Vehicle Speech Recognition," IEICE Trans. Information and Systems, Vol. E91-D, No. 3, pp. 430-438, March 2008. [link]
[11] Wooil Kim and H. Ko, "Noise Variance Estimation for Kalman Filtering of Noisy Speech," IEICE Trans. Information and Systems, Vol. E84-D, No. 1, pp. 155-160, Jan, 2001. [link]
[12] Wooil Kim, S. Kang, and H. Ko, "Spectral subtraction based on phonetic dependency and masking effects," IEE Proc.-Vision Image and Signal Processing, Vol. 147, No. 5 , pp.423-427, Oct. 2000. [link]



2. Conference Papers (Peer-Reviewed)
[1] Bongsu Jung and Wooil Kim. "DLF-EEND: Dynamic Layer Fusion for End-to-End Speaker Diarization." Proc. Interspeech 2025. 2025. [Link] [2] Wooil Kim and J. H. L. Hansen, "An Advanced Feature Compensation Method Employing Acoustic Model With Phonetically Constrained Structure," ICASSP-2013, Vancouver, Canada, May 2013(Accepted).
[3] Wooil Kim and J. H. L. Hansen, "Gaussian Map based Acoustic Model Adaptation Using Untranscribed Data for Speech Recognition in Severely Adverse Environments," Interspeech-2012, Portland, Oregon, USA, Sept. 2012.
[4] Wooil Kim and J. H. L. Hansen, "Feature Compensation employing Online GMM Adaptation for Speech Recognition in Unknown Severely Adverse Environments," ICASSP-2012, pp. 4121-4124, Kyoto, Japan, March 2012.
[5] Wooil Kim and J. H. L. Hansen, "Feature Compensation for Speech Recognition in Severely Adverse Environments due to Background Noise and Channel Distortion," Interspeech-2011, pp. 1653-1656, Florence, Italy, Aug. 2011. [link]
[6] A. Taufique, K. Vijayasankar, Wooil Kim, J. H. L. Hansen, M. Tacca, and A. Fumagalli, "Phone Impact Based Speech Transmission Technique for Reliable Speech Recognition in Poor Wireless Network Conditions," Interspeech-2011, pp. 2529-2532, Florence, Italy, Aug. 2011. [link]
[7] J.-W. Suh, Yun Lei, Wooil Kim, and J. H. L. Hansen, "Effective Background Data Selection in SVM Speaker Recognition for Unseen Test Environment: More is Not Always Better," ICASSP-2011, pp. 5304-5307, Prague, Czech Republic, May 2011. [link]
[8] Wooil Kim, J.-W. Suh, and J. H. L. Hansen, "An Effective Feature Compensation Scheme Tightly Matched with Speech Recognizer Employing SVM-based GMM Generation," Interspeech-2010, pp. 2078-2081, Makuhari, Japan, Sept. 2010. [link]
[9] Wooil Kim and J. H. L. Hansen, "Angry Emotion Detection from Real-Life Conversational Speech by Leveraging Content Structure," ICASSP-2010, pp. 5166-5169, Dallas, U.S.A., March 2010. [link]
[10] Wooil Kim and J. H. L. Hansen, "Mask Estimation Employing Posterior-Based Representative Mean for Missing-Feature Speech Recognition with Time-Varying Background Noise," IEEE ASRU-2009, pp. 194-198, Merano, Italy, Dec. 2009. [link]
[11] Wooil Kim and J. H. L. Hansen, "Variational Model Composition for Robust Speech Recognition with Time-Varying Background Noise," Interspeech-2009, pp. 2399-2402, Brighton, UK, Sept. 2009. [link]
[12] Wooil Kim and J. H. L. Hansen, "Robust Angry Speech Detection Employing TEO-Based Discriminative Classifier Combination," Interspeech-2009, pp. 2019-2022, Brighton, UK, Sept. 2009. [link]
[13] Wooil Kim and J. H. L. Hansen, "Missing-Feature Method for Speaker Recognition in Band-Restricted Conditions," Interspeech-2008, pp.1909-1912, Brisbane, Australia, Sept. 2008. [link]
[14] J.H.L. Hansen, Wooil Kim, and P. Angkititrakul, "Advances in Human-Machine Systems for In-Vehicle Environments," IEEE HSCMA-2008: Hands-free Speech Communication and Microphone Arrays, pp. 128-131, Trento, Italy, May 2008. [link]
[15] Wooil Kim and J. H. L. Hansen, "Advances in Spoken Document Retrieval for the U. S. Collaborative Digitization Program," IEEE ASRU-2007, pp.687-692, Kyoto, Japan, Dec. 2007. [link]
[16] Wooil Kim and J. H. L. Hansen, "Advances in SpeechFind: Transcript Reliability Estimation Employing Confidence Measure based on Discriminative Sub-word Model for SDR," Interspeech-2007, pp.2409-2412, Antwerp, Belgium, Aug. 2007. [link]
[17] Wooil Kim, M. Akbacak and J. H. L. Hansen, "Advances in SpeechFind: CRSS-UTD Spoken Document Retrieval System," ACM SIGIR 2007 Workshop on Searching Spontaneous Conversational Speech, pp.23-28, Amsterdam, Netherlands, July 2007. [link]
[18] Wooil Kim and J. H. L. Hansen, "Missing-Feature Reconstruction for Band-Limited Speech Recognition in Spoken Document Retrieval," Interspeech-2006, pp.2306-2309, Pittsburgh, U.S.A., Sep. 2006. [link]
[19] Wooil Kim and R. M. Stern, "Band-Independent Mask Estimation for Missing-Feature Reconstruction in the Presence of Unknown Background Noise," ICASSP-2006, pp.305-308, Toulouse, France, May 2006. [link]
[20] Wooil Kim, R. M. Stern and H. Ko, "Environment-Independent Mask Estimation for Missing-Feature Reconstruction," Interspeech-2005, pp.2637-2640, Lisbon, Portugal, Sep. 2005. [link]
[21] Wooil Kim, O. Kwon and H. Ko, "PCMM-based Feature Compensation Schemes Using Model Interpolation and Mixture Sharing," ICASSP-2004, pp.989-992, Montreal, Canada, May 2004. [link]
[22] Wooil Kim, S. Ahn and H. Ko, "Feature Compensation Scheme Based on Parallel Combined Mixture Model," Eurospeech-2003, pp. 677-680, Geneva, Switherland, Sep. 2003. [link]
[23] Wooil Kim and H. Ko, "Improved Acoustic Modeling Based on Selective Data-Driven PMC," ICASSP-2002, Student Forum, Orlando, U.S.A., May 2002. [link]
[24] Wooil Kim, T. Kim, S. Ahn and H. Ko, "Model Based Stress Decision Method," Eurospeech-2001, Vol. 1, pp.107-110, Alborg, Denmark, Sep. 2001. [link]



3. Book Chapters
[1] Wooil Kim and J. H. L. Hansen, "Feature Compensation Employing Variational Model Composition for Robust Speech Recognition in In-Vehicle Environment," Chapter 11 of Digital Signal Processing for In-Vehicle Systems and Safety, pp.175-186, Springer, Nov. 2011. [link]
[2] J. H. L. Hansen, A. Sangwan, and Wooil Kim, "Speech Under Stress and Lombard Effect: Impact and Solutions for Forensic Speaker Recognition," Chapter 5 of Forensic Speaker Recognition, pp.103-124, Springer, Oct. 2011. [link]
[3] J. H. L. Hansen, P. Angkititrakul, and Wooil Kim, "Advances in Human-Machine Systems for In-Vehicle Environments: Noise and Cognitive Stress/Distraction," Chapter 14 of Recent Advances in Robust Speech Recognition Technology, pp.197-210, Bentham Science Publishers, 2011 (DOI:10.2174/97816080517241110101). [link]
[4] Wooil Kim and J. H. L. Hansen, "SpeechFind: Advances in Rich Content Based Spoken Document Retrieval," Chapter 17 of Handbook of Research on Digital Libraries: Design, Development, and Impact, pp.173-187, IGI Global, Jan. 2009. [link]
[5] Wooil Kim and J. H. L. Hansen, "Feature Compensation Employing Model Combination for Robust Speech Recognition in In-Vehicle Environment," Chapter 19 of In-Vehicle Corpus and Signal Processing for Driver Behavior, pp.233-243, Springer, 2009. [link]


4. Etc.
[1] J. H. L. Hansen and Wooil Kim, "SpeechFind Retrieves Documents for National Gallery of the Spoken Word," Speech and Language Technical Committee(SLTC) e-Newsletter, IEEE Signal Processing Society, Oct. 2006. [link]