John McKenna has been interested in the application of statistical, data-driven, and machine-learning techniques to the processing of speech. More specifically, he is interested in speaker characterisation and voice transformation.

He is now also moving into educational research. He is interested in the pedagogy of problem solving especially with respect to novice programmers. Computer-assisted language learning (CALL) is also an interest.

He is a member of the NCLT (National Centre for Language Technology) and RINCE (Research Institute for Networks and Communications Engineering), both based at DCU, and is a member of the International Speech Communication Association (ISCA) and the Irish Speech Group (ISG).

Publications

Errity, A. and McKenna, J. (2009), "A comparison of linear and nonlinear dimensionality reduction methods applied to synthetic speech," in Proc. of Interspeech 2009 - Eurospeech, Brighton, UK.

Errity, A., McKenna, J., and Kirkpatrick, B. (2007), "Dimensionality reduction methods applied to both magnitude and phase derived features," in Proc. of Interspeech 2007 - Eurospeech, Antwerp, Belgium.

Errity, A. and McKenna, J. (2007), "A comparative study of linear and nonlinear dimensionality reduction for speaker identification," in Proc. of the 15th Int. Conf. on Digital Signal Processing (DSP), Cardiff, Wales.

Errity, A., McKenna, J., and Kirkpatrick, B. (2007), "Manifold learning-based feature transformation for phone classification," in Proc. of the ISCA Tutorial and Research Workshop on Nonlinear Speech Processing (NOLISP), Paris, France. Revised Selected Papers, ser. Lecture Notes in Computer Science, M. Chetouani, A. Hussain, B. Gas, M. Milgram, and J.-L. Zarader, Eds., vol. 4885. Springer, 2007.

Errity, A. and McKenna, J. (2006), "An investigation of manifold learning for speech analysis," in Proc. of the Int. Conf. on Spoken Language Processing (Interspeech 2006 - ICSLP), Pittsburgh PA, USA.

Tooher, M. and McKenna, J. (2005), "Application of glottal source information to speech recognition" in Proceedings of SPECOM 2005, Greece.

Errity, A., McKenna, J. and Isard, S. (2004), "Unscented Kalman filtering of line spectral frequencies" in Proc. InterSpeech ICSLP 2004 (Korea).

Tooher, M. and McKenna, J. (2004), "Prediction of the Glottal LF Parameters using Regression Trees" in Proc. InterSpeech ICSLP 2004 (Korea).

McKenna, J.G. (2004), Kalman filtering towards automatic speaker characterisation, Ph.D. Thesis, University of Edinburgh.

Tooher, M. and McKenna, J. (2003), "Variation of glottal LF parameters across F0, vowels and phonetic environment" in Proceedings of ISCA Tutorial and Research Workshop on Voice Quaility Functions, Analysis and Synthesis (VOQUAL '03), Geneva, Switzerland.

McKenna, J.G. (2001), "Automatic glottal closed-phase location and analysis by Kalman filtering", in Proceedings of the 4th ISCA Tutorial and Research Workshop on Speech Synthesis, Pitlochry, Scotland.

McKenna, J. and Isard, S. (1999), "Tailoring Kalman Filtering Towards Speaker Characterisation" in Proc. Eurospeech 99, Budapest, Hungary.