Jacqueline Walker

Lecturer PhD, BEng

 
researcher

Biography

                      

Dr Jacqueline Walker B.A., B.E. (Hons I), PhD is an expert in synchronization, time and frequency transfer. She has worked on developing systems for time transfer and also made contributions to techniques reducing the probability of metastable failure in digital systems. Dr Walker also has expertise in biomedical, speech and music signal processing, including postgraduate research student supervision and involvement in funded research projects including as Principal Investigator. She is with the Department of Electronic and Computer Engineering at the University of Limerick, Ireland where she currently lectures in Cloud Computing, Digital Electronics and Mobile and Wireless Communications.

                      

Research Interests

Telecommunications: synchronization and end-to-end timing transfer in networks including satellite networks, jitter; Metastability.
Signal processing, especially nonlinear signal processing in a range of application areas: Biomedical: blind deconvolution to recover MUAP from EMG signals, inverse filtering to recover firing patterns; Speech: deconvolution and inverse filtering to recover glottal source, glottal source modelling and analysis; Music: polyphonic music transcription, polyphonic pitch detection, onset detection; Higher Order Statistics, especially bispectrum;

Book Chapters

  Year Publication
2012 'Genetic Programming for Musical Sound Analysis'
Loughran, R; Walker, J; O'Neill, M; McDermott, J (2012) 'Genetic Programming for Musical Sound Analysis' In: Evolutionary and Biologically Inspired Music, Sound, Art and Design LNCS vol. 7247. Berlin, Heidelberg, Germany: Springer. [DOI] [Details]
2007 'A Review of Glottal Waveform Analysis'
Walker, J; Murphy, P (2007) 'A Review of Glottal Waveform Analysis' In: Progress in Nonlinear Speech Processing, WNSP (Workshop on Nonlinear Speech Processing) 2005, LNCS 4391. Berlin: Springer-Verlag. [Details]
2005 'Advanced methods for glottal wave extraction'
Walker, J; Murphy, P (2005) 'Advanced methods for glottal wave extraction' In: Springer Verlag NOLISP 2005 Lecture Notes in Artificial Intelligence, 3817. Berlin: Springer-Verlag. [Details]

Peer Reviewed Journals

  Year Publication
2013 'Experimental and Simulation Study for Commercial Time Transfer Service over Geostationary Satellite'
Walker, J;Genova, M (2013) 'Experimental and Simulation Study for Commercial Time Transfer Service over Geostationary Satellite'. NCSLI Measure: The Journal of Measurement Science, [ULIR Link] [Details]
2010 'A New Spike Detection Algorithm for Extracellular Neural Recordings'
Shahid, S; Walker, J; Smith, LS (2010) 'A New Spike Detection Algorithm for Extracellular Neural Recordings'. IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, 57 (4):853-866 [DOI] [Details]
2010 'Experimental Evaluation of the Jitter Generated in Timing Transfer'
Walker, J; Cantoni, A (2010) 'Experimental Evaluation of the Jitter Generated in Timing Transfer'. IEEE TRANSACTIONS ON COMMUNICATIONS, 58 (12):3605-3612 [DOI] [ULIR Link] [Details]
2008 'Cepstrum of bispectrum - A new approach to blind system reconstruction'
Shahid, S; Walker, J (2008) 'Cepstrum of bispectrum - A new approach to blind system reconstruction'. SIGNAL PROCESSING, 88 (1):19-32 [DOI] [ULIR Link] [Details]
2007 'Modeling the effect of nonideal reference clocks on the jitter generated in timing transfer'
Walker, J; Cantoni, A (2007) 'Modeling the effect of nonideal reference clocks on the jitter generated in timing transfer'. IEEE TRANSACTIONS ON COMMUNICATIONS, 55 (1):44-47 [DOI] [ULIR Link] [Details]
2007 'Characterization of a flip-flop metastability measurement method'
Cantoni, A; Walker, J; Tomlin, TD (2007) 'Characterization of a flip-flop metastability measurement method'. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 54 (5):1032-1040 [DOI] [Details]
2006 'Smart music onset detection combined with band-wise processing'
Liu, R; Feurer, K; Griffith, N; Walker, J (2006) 'Smart music onset detection combined with band-wise processing'. SHENGXUE JISHU, 25 (6):635-643 [Details]
2005 'Application of higher order statistics techniques to EMG signals to characterize the motor unit action potential'
Shahid, S; Walker, J; Lyons, GM; Byrne, CA; Nene, AV (2005) 'Application of higher order statistics techniques to EMG signals to characterize the motor unit action potential'. IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, 52 (7):1195-1209 [DOI] [ULIR Link] [Details]
2003 'A new reconstruction approach in the SRTS method'
Walker, J; Cantoni, A (2003) 'A new reconstruction approach in the SRTS method'. IEEE TRANSACTIONS ON COMMUNICATIONS, 51 (11):1761-1764 [DOI] [Details]
1999 'Modeling of the synchronization process jitter spectrum with input jitter'
Walker, J; Cantoni, A (1999) 'Modeling of the synchronization process jitter spectrum with input jitter'. IEEE TRANSACTIONS ON COMMUNICATIONS, 47 (2):316-324 [DOI] [Details]
1998 'Determining parameters to minimize jitter generation in the SRTS method'
Walker, J; Cantoni, A (1998) 'Determining parameters to minimize jitter generation in the SRTS method'. IEEE TRANSACTIONS ON COMMUNICATIONS, 46 (1):82-90 [DOI] [Details]
1996 'Jitter Analysis for Two Methods of Synchronization for External Timing Injection'
Walker, J; Cantoni, A (1996) 'Jitter Analysis for Two Methods of Synchronization for External Timing Injection'. IEEE TRANSACTIONS ON COMMUNICATIONS, 44 (2):269-276 [Details]
1996 'A New Synchronizer Design'
Walker, J; Cantoni, A (1996) 'A New Synchronizer Design'. IEEE TRANSACTIONS ON COMPUTERS, 45 (11):1308-1311 [Details]

Conference Publications

  Year Publication
2014 17th International Conference on Digital Audio Effects DAFx14
Roddy, M; Walker, J (2014) A method of morphing spectral envelopes of the singing voice for use with backing vocals 17th International Conference on Digital Audio Effects DAFx14 [ULIR Link] [Details]
2014 17th International Conference on Digital Audio Effects DAFx14
Piggott, D;Walker, J (2014) A preliminary model for the synthesis of source spaciousness 17th International Conference on Digital Audio Effects DAFx14 [ULIR Link] [Details]
2012 44th Precise Time and Time Interval Meeting
Walker, J; Genova, M (2012) Experimental and Simulation Study for Commercial Time Transfer Service over Geostationary Satellite 44th Precise Time and Time Interval Meeting [ULIR Link] [Details]
2012 EvoMusart 2012
Loughran, R; Walker, J; O'Neill, M; McDermott, J (2012) Genetic Programming for Musical Instrument Identification EvoMusart 2012 , 11-APR-12 - 13-APR-12 [Details]
2009 20th Irish Signals and Systems Conference
Loughran R Walker J O'Neill M (2009) An exploration of genetic algorithms for efficient musical instrument identification 20th Irish Signals and Systems Conference , 10-JUN-09 - 11-JUN-09 [Details]
2008 International Computer Music Conference
Loughran, R., Walker, J., O¿Farrell, M. and O¿Neill, M. (2008) The Use of Mel-frequency Cepstral Coefficients in Musical Instrument Identification International Computer Music Conference , 24-AUG-08 - 29-AUG-08 , pp.387-390 [ULIR Link] [Details]
2008 2008 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION, VOLS 1-8
Piccand, S; ONeill, M; Walker, J (2008) On the Scalability of Particle Swarm Optimisation 2008 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION, VOLS 1-8 , pp.2505-2512 [Details]
2008 2008 INTERNATIONAL CONFERENCE ON AUDIO, LANGUAGE AND IMAGE PROCESSING, VOLS 1 AND 2, PROCEEDINGS
Loughran, R; Walker, J; ONeill, M; OFarrell, M (2008) Musical instrument identification using principal component analysis and multi-layered perceptrons 2008 INTERNATIONAL CONFERENCE ON AUDIO, LANGUAGE AND IMAGE PROCESSING, VOLS 1 AND 2, PROCEEDINGS , pp.643-648 [ULIR Link] [Details]
2008 2008 INTERNATIONAL CONFERENCE ON AUDIO, LANGUAGE AND IMAGE PROCESSING, VOLS 1 AND 2, PROCEEDINGS
Kreutzer, C; Walker, J; ONeill, M (2008) A parametric model for spectral sound synthesis of musical sounds 2008 INTERNATIONAL CONFERENCE ON AUDIO, LANGUAGE AND IMAGE PROCESSING, VOLS 1 AND 2, PROCEEDINGS , pp.633-637 [Details]
2008 SIGMAP 2008: PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING AND MULTIMEDIA APPLICATIONS
Kreutzer, C; Walker, J; ONeill, M (2008) Time domain attack and release modeling - Applied to spectral domain sound synthesis SIGMAP 2008: PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING AND MULTIMEDIA APPLICATIONS , pp.119-124 [ULIR Link] [Details]
2008 8th International Conference on Mathematics in Signal Processing
Quinn D; Walker, J (2008) Statistical, Spectral and Stochastic Characteristics of Music 8th International Conference on Mathematics in Signal Processing Cirencester, England, UK, , 16-DEC-08 - 18-DEC-08 , pp.120-123 [Details]
2008 8th International Conference on Mathematics in Signal Processing
Quinn, D; Walker, J (2008) Wavelet-Based Transforms as a Means of Signal Separation 8th International Conference on Mathematics in Signal Processing Cirencester, England, UK, , 16-DEC-08 - 18-DEC-08 , pp.157-161 [Details]
2008 5th International Symposium on Computer Music Modeling and Retrieval
Loughran, R; Walker, J; O'Farrell, M; O'Neill, M (2008) Comparison of Features in Musical Instrument Identification using Artificial Neural Networks 5th International Symposium on Computer Music Modeling and Retrieval Copenhagen, Denmark, , 19-MAY-08 - 23-MAY-08 , pp.19-33 [ULIR Link] [Details]
2007 Inaugural International Conference on Music Communication Science (ICOMCS)
Kelly, R; Walker, J (2007) Automatic Transcription of Polyphonic Piano Music Using a Note Masking Technique Inaugural International Conference on Music Communication Science (ICOMCS) , 04-DEC-07 - 07-DEC-07 [ULIR Link] [Details]
2007 Progress in Nonlinear Speech Processing
Walker, J; Murphy, P (2007) A review of glottal waveform analysis Progress in Nonlinear Speech Processing , pp.1-21 [Details]
2007 GECCO 2007: GENETIC AND EVOLUTIONARY COMPUTATION CONFERENCE, VOL 1 AND 2
Piccand, S; ONeill, M; Walker, J (2007) Scalability of Particle Swarm Algorithms GECCO 2007: GENETIC AND EVOLUTIONARY COMPUTATION CONFERENCE, VOL 1 AND 2 , pp.179-179 [Details]
2006 IEEE International Symposium on Circuits and Systems (ISCAS06)
Cantoni, A. and Walker, J. (2006) Characterization of a Metastability Measurement System . In: Proceedings of the 2006 IEEE International Symposium on Circuits and Systems. ISBN: 0-7803-9390-2; IEEE CAS Society eds. IEEE International Symposium on Circuits and Systems (ISCAS06) , 21-MAY-06 - 24-MAY-06 , pp.4135-4138 [Details]
2005 Nonlinear Speech Processing 2005 (NOLISP'05)
Walker, J. and P. Murphy (2005) Glottal pulse identification CD-Rom Proceedings . In: Faundez-Zanuy, M eds. Nonlinear Speech Processing 2005 (NOLISP'05) , 19-APR-05 - 22-APR-05 , pp.CD-Rom-* [Details]
2005 ISCA Tutorial and Workshop on Nonlinear Speech Processing - NoLisp'05
Walker, J,Murphy, P (2005) Advanced methods for glottal wave extraction ISCA Tutorial and Workshop on Nonlinear Speech Processing - NoLisp'05 Barcelona, Spain, , 19-APR-05 - 22-APR-05 , pp.139-149 [Details]
2004 17th International EURASIP Conference BIOSIGNAL 2004
Shahjahan, S; Walker, J; Lyons, G; Byrne, C A (2004) Characterization of Neuron Firing Pulses in Electromyographic Signal 17th International EURASIP Conference BIOSIGNAL 2004 , 23-JUN-04 - 25-JUN-04 , pp.72-74 [Details]
2004 6th IMA International Conference on Mathematics in Signal Processing
Walker, J; Bimbot, F; Benaroya, L (2004) Experimental Evaluation of Source Separation with Only One Sensor 6th IMA International Conference on Mathematics in Signal Processing Cirencester, England, UK, , 14-DEC-04 - 16-DEC-04 , pp.203-206 [ULIR Link] [Details]
2004 4th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)
Walker, J (2004) An Improved Jitter Time-Stamp for Timing Recovery in AAL2 4th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP) Newcastle, England, UK, , 20-JUL-04 - 22-JUL-04 , pp.318-321 [Details]
2003 Irish Signals and Systems Conference 2003 (ISSC'03)
Shahid, S. and Walker, J. (2003) The complex cepstrum of bicepstrum for system reconstruction with application to sEMG signal . In: H. Mahdi, M. J. Hayes eds. Irish Signals and Systems Conference 2003 (ISSC'03) , 30-JUN-03 - 02-JUL-03 , pp.230-235 [ULIR Link] [Details]
2003 ISCA Tutorial and Workshop on Nonlinear Speech Processing - Nolisp'03
Walker, J (2003) Application of the bispectrum to glottal pulse analysis’ ISCA Tutorial and Workshop on Nonlinear Speech Processing - Nolisp'03 , 20-MAY-03 - 23-MAY-03 [ULIR Link] [Details]
2003 Stockholm Music Acoustics Conference (SMAC’03)
Liu, R; Griffith, N;, Walker, J; Murphy, P (2003) Time domain note average energy based music onset detection . In: Bresin, R eds. Stockholm Music Acoustics Conference (SMAC’03) Stockholm, Sweden, , 06-AUG-03 - 09-AUG-03 , pp.553-556 [ULIR Link] [Details]
2003 Irish Signals and Systems Conference 2003 (ISSC'03)
Walker, J. and Murphy, P. (2003) An Analytical Spectral Formulation of Glottal Flow . In: H. Mahdi, M. J. Hayes eds. Irish Signals and Systems Conference 2003 (ISSC'03) , 30-JUN-03 - 02-JUL-03 , pp.242-246 [Details]
2001 Irish Signals and Systems Conference 2001 (ISSC'01)
Walker, J. and Murphy, P. (2001) Spectra of Amplitude-Perturbed Glottal Waveforms . In: * eds. Irish Signals and Systems Conference 2001 (ISSC'01) , 25-JUN-01 - 27-JUN-01 , pp.364-367 [ULIR Link] [Details]
2001 Irish Signals and Systems Conference 2001 (ISSC'01)
Shahid, S. and Walker, J. (2001) Application of Bispectrum Based Signal Reconstruction to sEMG Signal . In: * eds. Irish Signals and Systems Conference 2001 (ISSC'01) , 25-JUN-01 - 27-JUN-01 , pp.407-411 [ULIR Link] [Details]
2000 University of Limerick Biomedical Institute, 3rd Annual Research Day, Biomedicine in the Aged
Walker, J. and Shahid, S. (2000) Higher order spectral estimation and its application in biomedical signal processing . In: Dr T. McLoughlin eds. University of Limerick Biomedical Institute, 3rd Annual Research Day, Biomedicine in the Aged , 23-JUN-00 - 23-JUN-00 , pp.5-5 [Details]
1994 IEEE International Symposium on Circuits and Systems 1994 (ISCAS'94)
Walker, J. and Cantoni, A. (1994) A New Design for a Frame Sampling Synchronizer . In: R Soin eds. IEEE International Symposium on Circuits and Systems 1994 (ISCAS'94) , 30-MAY-94 - 02-JUN-94 , pp.97-100 [Details]

Education

  Year Institution Qualification Subject
1997 Curtin University of Technology Ph.D.
1993 University of Western Australia Bachelor of Engineering

Languages

  Language Reading Writing Speaking
Italian Functional Functional Functional
French Fluent Functional Functional