Koh Soo Ngee
Professor and Associate Chair (Academic) of
Electrical and Electronic Engineering

Contacts

Academic Qualification and Professional Affiliation

  • BEng Sing., BSc Lond., MSc PhD Lough.
  • SrMIEEE, FIES

Research Interests

  • Speech and Audio Coding, Speech Enhancement and Recognition.
  • Blind Source Separation and Communication Signal Processing.
  • Computed-Assisted Lanuage Learning.

Selected Publications

Journal Papers

  1. V G Reju, S N Koh and I Y Soon, "Underdetermined Convolutive Blind Source Separation via Time-frequency Masking", IEEE Transactions on Audio, Speech and Language Processing, Vol. 18, No. 1. January 2010, pp. 101-116.
  2. V G Reju, S N Koh and I Y Soon, "An Algorithm for Mixing Matrix Estimation in Instantaneous Blind Source Separation", Signal Processing, Vol. 89, No 9, September 2009, pp. 1762-1773.
  3. T Li, S Rahardja and S N Koh, "Fixed Quality Layered Audio based on Scalable Lossless Coding", IEEE Transactions on Multimedia, Vol. 11, No. 3 April 2009, pp. 422-432.
  4. H Ding, I Y Soon and S N Koh, "A Spectral Filtering Method Based on Hybrid Wiener Filters for Speech Enhancement", Speech Communication, Vol. 51, No. 3, March 2009, pp. 259-267.
  5. V G Reju, S N Koh and I Y Soon, "Partial Separation Method for Solving Permutation Problem in Frequency Domain Blind Source Separation of Speech Signals", Neurocomputing, Vol. 71, No, 10-12, Jun 2008, pp. 2098-2112.
  6. T Li, S Rahardja and S N Koh, "Frequency Region based Prioritized Bit-plane Coding for Scalable Audio", IEEE Transactions on Audio, Speech and Language Processing, Vol. 16, No. 1, Jan 2008, pp. 94-105.
  7. C H You, S Rahardja and S N Koh, "Audible Noise Reduction in Eigendomain for Speech Enhancement", IEEE Transactions on Audio, Speech and Language Processing, Vol. 15 No. 6, Aug 2007, pp.1753-1765.
  8. C H You, S N Koh and S Rahardja, "Subband Kalman Filtering Incorporating Masking Properties for Noisy Speech Signal", Speech Communication, Vol 49, Issues 7-8, 2007, pp. 558-573.
  9. X B Liu, S N Koh and T H Cheng, "Improved Bit-based joint Source-Channel Decoding of Variable Length-Codes", IEEE Communication Letters, Vol 11, No 6, June 2007, pp.515-518.
  10. X Zhang, S N Koh, I Y Soon and C H You, "Post Processing in Masking-Based ß-Order MMSE Speech Enhancement", Applied Acoustics, Vol. 69, Issue 4, Apr 2008, pp. 354-357.
  11. V G Reju, S N Koh and I Y Soon, "Convolution Using Discrete Sine and Cosine Transforms", IEEE Signal Processing Letters, Vol. 14, NO.7, July 2006, pp.445-448.(Matlab Programmes)
  12. X Liu, C Lu, T H Cheng and S N Koh, "A Simplified Step-by-step Decoding Algorithm for Parallel Decoding of Reed-Solomon Codes," IEEE Transactions on Communications, Vol.55, No.6, June 2007, pp.1103-1109.
  13. C H You,  S N Koh and S Rahardja,  "Masking-based beta-order MMSE Speech enhancement",  Speech Communication,  Vol. 48, Issue 1, pp.57 - 70, January 2006.
  14. C H You, S N Koh and S Rahardja, "An Invertible Frequency Eigendomain Transformation for Masking-Based Subspace Speech Enhancement," IEEE Signal Processing Letters, Vol. 12, No. 5, May 2005, pp 461-464.
  15. X B Liu and S N Koh, "Iterative Joint Source-Channel Decoding with Combined A Priori Information of Source and Channel," IEEE Communications Letter, Vol.9, No. 4, April, 2005, pp.355-357.
  16. C H You, S N Koh and R Susanto , "Beta-Order MMSE Spectral Amplitude Estimation for Speech Enhancement," IEEE Transactions on Speech and Audio Processing, Vol.13, No.4, July 2005, pp457-486.
  17. I Y Soon and S N Koh, "Speech Enhancement Using Two Dimensional Fourier Transform," IEEE Transactions on Speech and Audio Processing, Vol. 11, No. 6,  November 2003, pp. 717-724.
  18. G Chen, S N Koh and I Y Soon, "Enhanced Itakura Measure based on Masking Properties of Human Auditory System," Signal Processing, Vol. 83, No. 6, June 2003, pp. 1445-1456.
  19. X B Liu and S N Koh, "Hybrid Symbol- and Bit-Based Source Controlled Channel Decoding for MELP Speech Parameters," IEEE Communications Letters, Vol. 7, No. 8, August 2003, pp. 394-396.
  20. X B Liu and S N Koh, "Simplification of soft-bit speech decoding and application to MELP encoded speech," IEE Electronics Letters, Vol. 39, No. 3, February 2003, pp. 332-333.
  21. I Y Soon, S N Koh, C K Yeo and W H Ngo, "Transformation of narrowband speech into wideband speech with aid of zero crossings rate," IEE Electronics Letters, November 2002, Vol. 38. No. 24.
  22. X B Liu, S N Koh and S Yoshida, "Error Concealment Using Residual Redundancy for MELP Parameter," IEICE Transactions on Information and Systems, Vol. E85-D, No. 5, May 2002, pp. 906-909.
  23. W Lin, S N Koh and X Lin , "An 8-/8-4-kbps Wideband Speech Coder Based on Mixed Excitation Linear Prediction," Signal Processing, Vol. 81, No. 7, Netherlands, July 2001, pp. 1437-1448.
  24. I Y Soon and S N Koh, "Low Distortion Speech Enhancement," IEE-Proceedings - Vision, Image and Speech Processing, Vol. 147, No. 3, UK, June 2000, pp. 247-253.
  25. C Chen, S N Koh and I Y Soon, "An Associatively Classified Partitioned Vector Quantizer," Signal Processing, Vol. 76, No. 3, Netherlands, 1999.
  26. I Y Soon, S N Koh and C H Yeo, "Improved noise suppresion filter using adaptive estimator of probability of speech absence," Signal Processing, Vol. 75, No. 2, Netherlands, 1999.
  27. C Chen, S N Koh and I Y Soon, "Fast codebook search algorithm for unconstrained vector quantization," IEE Proceedings - Vision, Image and Signal Processing,Vol. 145, No. 2, UK, April 1998, pp. 97-102.

Conference Papers

  1. C H You, S N Koh, H Li and S Rahardja, "An Improved Adaptive Beta-order MMSE Speech Enhancement Method", Proceedings of Asia Pacific Signal and Information Processing Association Annual Summit and Conference, Sapporo, October, 2009
  2. H Ding, I Y Soon, S N Koh and C K Yeo, "A Post-processing Technique for Regeneration of Over-attenuated Speech Components", Proceedings of IEEE International Conference on Acoustics, Speech and Signal Processing, Taipei, April, 2009
  3. T Li, S Rahardja and SN Koh, "A Fully Scalable Audio Coding Structure with Embedded Psychoacoustic Model" , Proceedings of IEEE International Conference on Acoustics, Speech and Signal Processing, Las Vegas, April 2008.
  4. T Li, S Rahardja and SN Koh, "Efficient Stereo Bitrate Allocation for Fully Scalable Audio Codec", Proceedings of IEEE International Workshop on Multimedia Signal Processing MMSP2008, Cairns, Australia, October, 2008.
  5. C H You, S Rahardja and S N Koh, "Autoregressive Parameter Estimation for Kalman Filtering Speech Enhancement", Proceedings of IEEE International Conference on Acoustics, Speech and Signal Processing, Honolulu, April 2007.
  6. T Li, S Rahardja and S N Koh, "Perceptually Prioritized Bit-plane Coding for High-definition Advanced Audio Coding", Proceedings of IEEE International Symposium on Multimedia, San Diego, December 2006.
  7. V G Reju, S N Koh and I Y Soon, "A Robust Correlation Method for Solving Permutation Problem in Frequency Domain Blind Source Separation of Speech Signals," Proceeding of Asia Pacific Conference on Circuits and Systems, Singapore, Dec 2006.
  8. C H You, S Rahardja and S N Koh, "Perceptual Kalman Filtering Speech Enhancement", Proc-IEEE International Conference on Acoustics, Speech and Signal Processing 2006, Toulouse, May 2006.
  9. V G Reju, S N Koh, I Y Soon and X Zhang, "Solving Permutation Problem in Blind Source Separation of Speech Signals: A Method Applicable for Collinear Sources", Proceedings ICICS2005, Bangkok, December 2005.
  10. C H You, S N Koh and R Susanto, "Signal Subspace Speech Enhancement for Audible Noise Reduction," Proc-IEEE International Conference on Acoustics, Speech and Signal Processing 2005, Philadelphia, March 2005.
  11. C H You, S N Koh and R Susanto , "An MMSE Speech Enhancement Approach Incorperating Masking Properties," Proc-IEEE International Conference on Acoustics, Speech and Signal Processing 2004, Montreal, May 2004.
  12. C You, S N Koh and R Susanto, "Adaptive Beta-Order MMSE Estimation for Speech Enhancement," Proc-IEEE International Conference on Acoustics, Speech and Signal Processing 2003, Hong Kong, April 2003.
  13. G Chen, S N Koh and I Y Soon, "Speech Enhancement Based on F-norm Constrained Truncated SVD Algorithm," Proc-IEEE Workshop on Digital Signal Processing 2003, Japan, April 2003.
  14. H Wang, S N Koh and G Shu, "Wideband Speech Coder Employing T-codes and Reversible Variable Length Codes," Proc-IEEE Workshop on Speech Coding, SCW 2002, Tsukuba, October 2002.
  15. G Shu and S N Koh, "Application of Variable Length List Viterbi Algorithm to the ITU-T ADPCM Coder," Proc-9th International Workshop on Systems, Signals and Image Processing, IWSSIP'02, Manchester, November 2002.
Updated 14 Dec 2009