Speech perception, speech processing, speech enhancement, speech recognition, speaker identification and verification, statistical learning

Ph.D. Research

• Dissertation topic: Role of STFT Phase Spectrum in Speech Processing
• Expected graduation date: July 2009
• Advisors: Prof. Kuldip K. Paliwal and Dr. Stephen So

BEng (Hons), BInfTech

• Best Paper Award, Griffith School of Engineering Research Conference, Brisbane, 2007
• Australian Research Council (ARC) Postgraduate Research Scholarship, Brisbane, 2005-2009
• Scholarship for Outstanding Academic Achievement, Griffith University, Brisbane, 2000
• National Mathematics Summer School, The Australian National University, Canberra, 2000, 1999
• Certificate of Excellence for Outstanding Academic Achievement, University of Tasmania, 1999
• Award for Best Design, Electronics Competition, The Electronics Educators Association, 1998

• Paliwal, K.K. and K.K. Wójcicki. Effect of analysis window duration on speech intelligibility. IEEE Signal Processing Letters, Vol. 15, 2008. (To appear)
• Stark, A., Wójcicki, K.K., Lyons, J.G. and K.K. Paliwal. Noise driven short time phase spectrum compensation procedure for speech enhancement, In Proceedings of the 10th International Conference on Spoken Language Processing (INTERSPEECH-ICSLP), Brisbane, Australia, Sep. 2008. (To appear)
• Wójcicki, K.K., Milacic, M., Stark, A., Lyons, J.G. and K.K. Paliwal. Exploiting conjugate symmetry of the short-time Fourier spectrum for speech enhancement. IEEE Signal Processing Letters, Vol. 15, pp. 461-464, 2008.
• Wójcicki, K.K. and K.K. Paliwal. On the relative importance of the short-time magnitude and phase spectra towards speaker dependent information, In Proceedings of the ISCA Tutorial and Research Workshop (ITRW), Aalborg, Denmark, Jun. 2008.
• Wójcicki, K.K. and K.K. Paliwal. Effect of the dynamic range of an analysis window on phase-only and magnitude-only speech reconstruction for human speaker verification. In Proceedings of the Griffith School of Engineering Research Conference (GSERC), Brisbane, Australia, Oct. 2007.
• Wójcicki, K.K., So, S. and K.K. Paliwal. The effect of the additivity assumption on time and frequency domain Wiener filtering for speech enhancement. In Proceedings of the 8th European Conference on Speech Communication and Technology (INTERSPEECH), Antwerp, Belgium, pp. 798-601, Aug. 2007.
• Wójcicki, K.K. and K.K. Paliwal. Importance of the dynamic range of an analysis window function for phase-only and magnitude-only reconstruction of speech. In Proceedings of the 32nd International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Honolulu, Hawaii, USA, Vol. IV, pp. 729-733, Apr. 2007.
• Wójcicki, K.K., Shannon, B.J. and K.K. Paliwal. Spectral subtraction with variance reduced noise spectrum estimates. In Proceedings of the 11th Australasian International Conference on Speech Science and Technology (SST), Auckland, New Zealand, pp. 76-81, Dec. 2006.

Teaching Assistant

• Unix Systems
• Signals and Systems
• Digital Signal Processing
• Advanced Digital Signal Processing

Server Specialist
Participated in an enterprise class data center relocation for the Gold Coast City Council.

Field Services Engineer
Participated in various team projects including server and workstation deployments for corporate clients such as AMCOR, Blake Dawson Waldron, Bank of Queensland, Pindara Private Hospital, and others. Other duties included pre-deployment site inspections as well as equipment audits.

Field Services Engineer
Performed Point-Of-Sale (POS) deployments for various corporate clients including Queensland Transport, Coles, Woolworths, and Commonwealth Bank Business Centers.

• Statistical Packages: SPSS, SHAZAM, Statistics Toolbox (Matlab)
• Programming: Matlab, C/C++/C#, Qt, PBS, SQL, Java, Perl, .NET, Scheme (GIMP), Linux shell scripting
• Publishing: L^ATEX2_e

Available on request