ChoiE
Eric Choi
Principal Research Engineer
Previous Positions
Dr. Choi was appointed as an Associate Consultant at the Hong Kong Productivity Council from 1990 to 1992. He joined the Motorola Australian Research Centre in 1995 and was a key member in establishing the Speech Technology Laboratory there. Since then, he had been working on various research issues related to speech recognition, speaker verification and multimodal user interface.
Dr. Choi accepted his Principal Research Engineer position with NICTA in January 2004.
Qualifications
Dr. Choi was graduated from the Chinese University of Hong Kong in 1986 where he received a Bachelor of Science (First Class) in Electronics. He received his PhD in Electrical Engineering from the University of Sydney in 1996. His PhD thesis was titled Spectral Transformation for Speaker Adaptation in HMM based Speech Recognition.
Research Interests
Dr. Choi's research interests include human-machine interaction, multimodal user interface, robust speech and speaker recognition, user modeling, statistical signal processing, statistical machine learning, and knowledge extraction.
NICTA Projects
Dr. Choi is currently involved in the project entitled Decision Support for Incident Management (DSIM) which aims to enhance the quality of decision support and enable real-time adaptation of systems and processes to improve efficiency and reduce procedural cognitive load on human operators. The adaptive decision support is characterized by its ability to measure unobtrusively the mental effort expended by human operators in real time and manage the cognitive load actively in order to achieve joint human-system optimization. The unobtrusive aspect is achieved by capturing the multimodal data streams that generated during the human-system interactions.
Affiliations
Dr. Choi is affiliated with the University of Sydney as an Honorary Associate and the University of New South Wales as a Conjoint Senior Lecturer.
Patents
“Measuring Cognitive Load”, filed CA2655189, December 2008.
“Measuring Cognitive Load” (Speech Content Analysis), filed AU2008905089, September 2008.
“Front-end Processing of Speech Signals”, filed WO2007041789, April 2007; AU2006301933, October 2006; AU2005905604, October 2005.
“Measuring Cognitive Load”, filed WO2007000030, January 2007; AU2006264222, June 2006; AU2005903441, June 2005.
"Method for Estimating a Confidence Measure for a Speech Recognition System", US Patent Num. 6,735,562, issued May 2004.
"Cohort Model Selection Apparatus and Method", US Patent Num. 6,393,397, issued May 2002.
Selected Publications
Le, P., Ambikairajah, E., Epps, J., Vidhyasaharan, S. and Choi, E., “Investigation of Spectral Centroid Features for Cognitive Load Classification”, Speech Communication, vol. 53, no. 4, April 2011, pp. 540-551.
Yap, T. F., Epps, J., Ambikairajah, E. and Choi, E., “Formant Frequencies under Cognitive Load: Effects and Classification”, EURASIP Journal on Advances in Signal Processing, vol. 2011, Article ID 219253, 11 pages, January 2011. doi:10.1155/2011/219253.
Yap, T. F., Epps, J., Ambikairajah, E. and Choi, E., “An Investigation of Formant Frequencies for Cognitive Load Classification”, Proc. Annual Conference of the International Speech Communication Association (InterSpeech’10), Makuhari, Japan, September 2010, pp. 2022-2025.
Le, P., Epps, J., Choi, E. and Ambikairajah, E., “A Study of Voice Source and Vocal Tract Filter Based Features in Cognitive Load Classification”, Proc. International Conference on Pattern Recognition (ICPR’10), Istanbul, Turkey, August 2010, pp. 4516-4519.
Yap, T. F., Epps, J., Choi, E. and Ambikairajah, E., “Glottal Features For Speech-Based Cognitive Load Classification”, Proc. IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP’10), Dallas, USA, March 2010, pp. 5234-5237.
Kua, J., Epps, J., Ambikairajah, E. and Choi, E., “LS Regularization of Group Delay Features for Speaker Recognition”, Proc. 10th Annual Conference of the International Speech Communication Association (InterSpeech 2009), Brighton, U.K., September 2009, pp. 2887-2890.
Wang, L., Ambikairajah, E. and Choi, E., “Robust Language Identification Based on Fused Phonotactic Information with MLKSFM Pre-classifier”, Proc. IEEE International Conference on Multimedia and Expo (ICME’09), New York City, USA, June/July 2009, pp. 121-124.
Yap, T. F., Ambikairajah, E., Choi, E. and Chen, F., “Phase Based Features for Cognitive Load Measurement System”, Proc. IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP’09), Taipei, Taiwan, April 2009, pp. 4825-4828.
Bae, C., Chung, Y. Y., Shukran, M. A., Choi, E. and Yeh, W., “An Intelligent Classification Algorithm for LifeLog Multimedia Applications”, Proc. IEEE 2008 International Workshop on Multimedia Signal Processing (MMSP’08), Cairns, Australia, October 2008, pp. 558-562.
Shi, Y., Choi, E., Taib, R. and Chen, F., “Designing Cognition-Adaptive Human Computer Interface for Mission-Critical Systems”, Proc. 17th International Conference on Information Systems Development (ISD’08), Phphos, Cyprus, August 2008, on CD.
Wang, L., Ambikairajah, E. and Choi, E., “Language Identification Using Modified MLKSFM for Pre-classification with Novel Front-end Features”, Proc. IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP’08), Las Vegas, March 2008, pp. 4245-4248.
Ruiz, N., Taib, R., Shi, Y., Choi, E. and Chen, F., “Using Pen Input Features as Indices of Cognitive Load” Proc. 9th International Conference on Multimodal Interfaces (ICMI’07), Nagoya, Japan, Nov. 2007, pp. 315-318.
Shi, Y., Ruiz, N., Taib, R., Choi, E. and Chen, F., “Galvanic Skin Response (GSR) as an Index of Cognitive Load”, Proc. SIGCHI Conference on Human Factors in Computing Systems (CHI’07), San Jose, April/May 2007, pp. 2651-2656.
Choi, E., Taib, R., Shi, Y. and Chen, F., “Multimodal User Interface for Traffic Incident Management in Control Room”, IET Intelligent Transport Systems, vol. 1, no.1, Mar 2007, pp. 27-36.
Choi, E., “A Noise Robust Front-end for Speech Recognition Using Hough Transform and Cumulative Distribution Mapping”, Proc. International Conference on Pattern Recognition (ICPR’06), Hong Kong, Aug. 2006, vol. 4, pp. 286-289.
Chen, F., Choi, E., Epps, J., Lichman, S., Ruiz, N., Shi, Y., Taib, R. and Wu, M., “A Study of Manual Gesture-Based Selection for the PEMMI Multimodal Transport Management Interface”, Proc. 7th International Conference on Multimodal Interfaces, Trento, Italy, Oct. 2005, pp. 274-281.
Choi, E., “A Generalized Framework for Compensation of Mel-filterbank Outputs in Feature Extraction for Robust ASR”, Proc. 9th European Conference on Speech Communication and Technology, Lisbon, Sept. 2005, pp. 933-936.
Choi, E., Holter, T., Epps, J. and Gopalakrishnan, A., “Temporal Structure Constrained Transformation for Speaker Adaptation”, Proc IEEE Int. Conf. on Acoustics, Speech and Signal Processing, Hong Kong, vol. 1, April 2003, pp. 564-567.
Choi, E, “On Reducing Complexity of Acoustic Models for Mandarin Speech Recognition”, Proc. 9th Australian Int. Conf. on Speech Science and Technology, SST’02, Melbourne, Dec. 2002, pp. 166-171.
Lee, R. and Choi, E, “An Online Model Adaptation Method for Compensating Speech Models for Noise in Continuous Speech Recognition”, Proc. IEEE Automatic Speech Recognition and Understanding Workshop, Trento, Dec. 2001.
Choi, E. and Song, J, “Successive Cohort Selection (SCS) for Text-Independent Speaker Verification”, Proc. Int. Conf. on Spoken Language Processing, Beijing, Oct. 2000, pp. 442-445.
Choi, E. and King R.W, “On the Use of Spectral Transformation for Speaker Adaptation in HMM Based Isolated-Word Speech Recognition”, Speech Communication, Aug. 1995, Vol. 17, Nos. 1-2, pp. 131-143.
 | | |
| Contact: | | Dr. Eric Choi |
| | |
| Phone: | | +61 2 9376 2100 |
| | |
| Fax: | | +61 2 9376 2027 |
| | |
| Postal Address: | | National ICT Australia Ltd |
| | |
Physical Address: | | National ICT Australia Ltd |
| | |
Email: | |
