Xuejie Zhang, Yan Xu, Andrew K. Abel, Leslie S. Smith, Roger Watt, Amir Hussain and Chengxiang Gao, Visual Speech Recognition with Lightweight Psychologically Motivated Gabor Features
-
Entropy, published 4 December 2020. DOI 10.3390/e22121367
-
M.Pahar, L.S. Smith Coding and Decoding Speech using a Biologically Inspired Coding System
-
presented at IEEE SSCI 2020, (virtual conference) 1-4 December 2020. DOI 10.1109/SSCI47803.2020.9308328.
-
Leslie S. Smith talk at Brain Informatics 2020: .pdf of slides, actual presentation (52 minutes long)
-
Invited talk at the Brain Informatics 2020 Conference, 19 September 2020
-
Leslie S. Smith Comments on Sejnowski's "The unreasonable effectiveness of deep learning in artificial intelligence"
-
ArXiv preprint [arXiv:2002.04806], submitted Fri, 20 Mar 2020
-
Graham S. Wood, Alberto Torin, Asaad K. Al-mashaal, Leslie S. Smith, Enrico Mastropaolo, Michael J. Newton, and Rebecca Cheung Design and Characterization of a Micro-Fabricated Graphene-Based MEMS Microphone
-
IEEE Sensors Journal, 19(7), September 2019, 7234 - 7242, DOI 10.1109/JSEN.2019.2914401. It is with huge sadness that I note the death of Enrico Mastropaolo, at a very young age.
-
Andrew Abel, Chengxiang Gao, Leslie Smith, Roger Watt, Amir Hussain Fast Lip Feature Extraction Using Psychologically Motivated Gabor Features
-
2018 IEEE Symposium Series on Computational Intelligence (SSCI), 18-21 November 2018, Bangalore, India, DOI 10.1109/SSCI.2018.8628931, Added to IEEE Xplore: 31 January 2019. Non-final version.
-
L.S. Smith Deep neural networks: the only show in town?
-
A position paper for the workshop Can Deep Neural Networks (DNNs) provide the basis for Artificial General Intelligence (AGI) at the Artificial General Intelligence 2016 conference, July 15-18, 2016, New York, USA.
-
Areli Rojo-Hernandeza, Giovanny Sanchez-Rivera, Gerardo Avalos-Ochoa, Hector Perez-Meana, Leslie S. Smith A Compact Digital Gamma-tone Filter Processor (also available here)
-
Microprocessors and Microsystems, 45A , 216-225 August 2016: doi:10.1016/j.micpro.2016.05.010
-
Varley A, Tyler A, Smith L, Dale P & Davies M, Mapping the spatial distribution and activity of 226Ra at legacy sites through Machine Learning interpretation of gamma-ray spectrometry data,
-
Science of the Total Environment, 545-546, pp. 654-661, 2016, 10.1016/j.scitotenv.2015.10.112
-
L.S. Smith Towards a Neuromorphic Microphone
-
Frontiers in Neuroscience (Neuromorphic Section), 9:398, 26 October 2015, doi 10.3389/fnins.2015.00398.
-
Victoria Hodge, Mark Jessop, Michael Weeks, Aaron Turner, Tom Jackson, Colin Ingram, Leslie Smith, Jim Austin, A Digital Repository and Execution Platform for Interactive Scholarly Publications in Neuroscience
-
Neuroinformatics, published online 26 August 2015, 10.1007/s12021-015-9276-3. 18 pages.
- Leslie S. Smith, Why sharing matters for electrophysiological data analysis
-
Brain Research Bulletin, published online 3 July 2015, Volume 119, October 2015, Part B, 145-149, doi:10.1016/j.brainresbull.2015.06.009
- Adam Varley, Andrew Tyler, Leslie Smith, Paul Dale, Mike Davies: Remediating radium contaminated legacy sites: Advances made through machine learning in routine monitoring of "hot" particles
-
Science of the Total Environment, 521-522,(2015), 271-279
-
A. Abel, D. Hunter, L.S.Smith, A biologically inspired onset and offset speech segmentation approach
-
presented at IJCNN 2015, Killarney, Ireland, 12-17 July 2015. doi: 10.1109/IJCNN.2015.7280347. Watch Dr Andrew Abel talking about this work at DemoFest 2014 in Edinburgh.
-
Adam Varley, Andrew Tyler, Leslie Smith, Paul Dale, Development of a neural network approach to characterise 226Ra contamination at legacy sites using gamma-ray spectra taken from boreholes
-
Journal of Environmental Radioactivity, 140 (2015) 130-140
-
K. Swingler and L.S. Smith, An Analysis of the Local Optima Storage Capacity of Hopfield Network Based Fitness Function Models
- Transactions on Computational Collective Intelligence XVII, N.T. Nguyen, R. Kowalcyk, A. Fred, F. Joaquim (eds), Springer 2014, pp 248-271
-
Abdulrahman Alalshekmubarak and Leslie S. Smith On Improving the Classification Capability of Reservoir Computing
for Arabic Speech Recognition
-
in Wermter, S., Weber, C., Duch, W., Honkela, T., Koprinkova-Hristova, P., Magg, S., Palm, G., Villa, A.E.P. (Eds.) , Artificial Neural Networks and Machine Learning-ICANN 2014, 24th International Conference on Artificial Neural Networks, Lecture Notes in Computer Science 8681, Springer Heidelberg, 2014, pages 225-232. Here is the poster as presented.
-
Leslie S. Smith, Jim Austin, Stephen Eglen, Tom Jackson, Mark Jessop, Bojian Liang, Michael Weeks and Evelyne Sernagor, The CARMEN data sharing portal project: what have we learned? There's also a presentation given at the Research Data Association meeting in Paris in September 2015.
-
Neuroinformatics 2014, Leiden, The Netherlands, 25-27 August 2014. Here is the poster as presented.
- S. Wang, T.J. Koickal, A. Hamilton, R. Cheung, L.S. Smith, A Bio-Realistic Analog CMOS Cochlea Filter With High Tunability and Ultra-Steep Roll-Off
- IEEE Transactions on Biomedical Circuits and Systems, 9(3), 297-311, 2015 ( e-published 31 July 2014, doi 10.1109/TBCAS.2014.2328321).
- A. Alalshekmubarak, L.S. Smith, A noise robust Arabic speech recognition system based on the echo state network
- Acoustical Society of America 167th meeting, Providence RI, USA, 5-9 May 2014. (J. Acoustical Society of America, 135 (4) part 2, p2195) Poster .pdf.
- L.S. Smith, A. Abel, Spectrotemporal Gabor filters for feature detection
-
Acoustical Society of America 167th meeting, Providence RI, USA, 5-9 May 2014. (J. Acoustical Society of America, 135 (4) part 2, p2297) Slides .pdf
- K. Swingler, L.S. Smith, Training and making calculations with mixed order hyper-networks
- Neurocomputing, 2014. Available online, 8 April 2014. doi http://dx.doi.org/10.1016/j.neucom.2013.11.041
- Kevin Swingler, Leslie S. Smith Mixed Order Associative Networks for Function Approximation, Optimisation and Sampling
- In: ESANN 2013 proceedings, 21st European Symposium on Artificial Neural Networks, Computational Intelligence and Machine Learning, ESANN. 21st European Symposium on Artificial Neural Networks, Computational Intelligence and Machine Learning, ESANN 2013, 24.4.2013 - 26.4.2013, Bruges, Belgium, pp. 23-28.
- Alalshekmubarak, Abdulrahman; Smith, Leslie S, A novel approach combining recurrent neural network and support vector machines for time series classification. (preprint)
- Innovations in Information Technology (IIT), 2013 9th International Conference on, pp.42,47, 17-19 March 2013
doi: 10.1109/Innovations.2013.6544391
- L.S. Smith, Perceptual time, perceptual reality and general intelligence.
- in Artificial General Intelligence, Proc of 5th International Conference, Oxford, December 2012, J. Bach, B. Goertzel and M. Ikle (editors), LNAI 7716, Springer, pp 292-301, 2012.
- L.S. Smith, On the
relationship between neural coding and the perception of the present
moment.
- poster presented at the Society for Neuroscience Annual Meeting, New
Orleans, October 2012
- Crook SM, Bednar JA, Berger S, Cannon R, Davison AP, Djurfeldt M,
Eppler J, Kriener B, Furber S, Graham B, Plesser HE, Schwabe L, Smith L,
Steuber V, van Albada S., Creating,
documenting and sharing network models. (pre-publication
pdf is available)
- Network: Computation in Neural Systems, 2012, 1-19, (ePub) DOI:
10.3109/0954898X.2012.722743
- Plamen L. Simeonov, Edwin H. Brezina, Ron Cottam, Andree C.
Ehresmann, Arran Gare, Ted Goranson, Jaime Gomez-Ramirez, Brian D.
Josephson, Bruno Marchal, Koichiro Matsuno, Robert S. Root-Bernstein,
Otto E. Rossler, Stanley N. Salthe, Marcin Schroeder, Bill Seaman, Pridi
Siregar, Leslie S. Smith: Stepping
Beyond the Newtonian Paradigm in Biology: Towards an Integrable Model
of Life: Accelerating Discovery in the Biological Foundations of
Science (INBIOSA White Paper),
- in Simeonov P.L., Smith L.S., Ehresmann, A.C. (eds) : Integral
Biomathics: Tracing the road to reality, Springer Verlag, pp319-418,
2012.
- Simeonov P.L., Smith L.S., Ehresmann, A.C. (eds), Integral
Biomathics: Tracing the road to reality
- Springer Verlag, 2012. Note that I have spare copies of this
book (as at December 2012): email me if you would like one.
- Friedrich Sommer, Thomas Wachtler, Andrew Davison, Michael Denker, Jeffrey Grethe, Sonja Grün, Kenneth Harris, Colin Ingram, Marja-Leena Linne, Bengt Ljungquist, John Miller, Roman Moucek, Hyrum Sessions, Gordon Shepherd, Leslie Smith, Jeff Teeters and Shiro Usui, Mission and activities of the INCF Electrophysiology Data Sharing Task Force (abstract)
-
Front. Neuroinform. Conference Abstract: 5th INCF Congress of Neuroinformatics, 10-12 September 2012, Munich. doi: 10.3389/conf.fninf.2014.08.00088
- M. Newton, L.S. Smith A
neurally-inspired musical instrument classification system based upon
the sound onset (note: paper is not final version)
- Journal of the Acoustical Society of America, Volume 131, Issue 6,
pp. 4785-4798 June 2012: doi 10.1121/1.4707535
- Bo Yu, Terrence Mak, Xiangyu Li, Leslie Smith, Yihe Sun and Chi-Sang
Poon, Stream-based
Hebbian Eigenfilter for real-time neuronal spike discrimination
- BioMedical Engineering OnLine 2012, 11:18 doi:10.1186/1475-925X-11-18
Published: 10 April 2012
- L.S. Smith: Seminar given at Imperial College, London, on December 7
2011, entitled "Am I Spiking neurons?"
- Powerpoint
presentation slides (pdf)
- R. Latif, E. Mastropaulo, A. Bunting, R. Cheung, T. Koickal, A.
Hamilton, M. Newton, L. Smith, Low
frequency tantalum electromechanical systems for biomimetical
applications
- J. Vac. Sci. Technol. B 29(6), Nov/Dec 2011. DOI 10.1116/1.3662408
- Bo Yu, Terrence Mak, Alex Yakovlev, Chi-Sang Poon, Yihe Sun, Leslie
Samuel Smith: Memory
Efficient On-Line Streaming for Multichannel Spike Train Analysis
- 33rd Annual International IEEE EMBS Conference, Aug 30-Sept 1, 2011,
Boston, pp 2315-2318,
- M. J. Newton and L.S. Smith, Biologically-inspired
neural coding of sound onset for a musical sound classification task,
- Neural Networks (IJCNN), The 2011 International Joint Conference on,
1386-1393, 10.1109/IJCNN.2011.6033386.
- Iffat Gheyas, Leslie Smith, A
novel neural network ensemble architecture for time series forecasting
- Neurocomputing 74, 3855-3864 (2011),
doi:10.1016/j.neucom.2011.08.005.
- Leslie Smith, Daniel Metz, Jungpen Bao, and Pedro Bizarro, Events,
Neural Systems and Time Series
- in M. Cezon and Y. Wolfsthal (Eds.): ServiceWave 2011 Workshops, LNCS
6569, pp. 196--202. Springer, Heidelberg (2011).
- Plamen L. Simeonov, Andree C. Ehresmann, Leslie S. Smith, Jaime G.
Ramirez, and Vaclav Repa, A
New Biology: A Modern Perspective on the Challenge of Closing the Gap
between the Islands of Knowledge
- in M. Cezon and Y. Wolfsthal (Eds.): ServiceWave 2011 Workshops, LNCS
6569, pp. 188--195. Springer, Heidelberg (2011).
- M. Newton and L.S. Smith, Using spiking onset neurons and a recurrent
neural network for musical sound classification.
- poster presented at 161st Meeting of the Acoustical Society of
America, Seattle, 23-27 May 2011. Abstract is at J. Acoustical Soc
America, 129, 4 part 2, p2486. But there's a lot more (and more
up-to-date) information on the poster
itself.
- R. Latif, E. Mastropaulo, A. Bunting, R. Cheung, T. Koickal, A.
Hamilton, M. Newton, L. Smith Microelectromechanical
systems for biomimetical applications
- J. Vac. Sci. Technol. B 28(6), Nov/Dec 2010, DOI information:
10.1116/1.3504892
- I.A. Gheyas and L.S. Smith, A
neural network-based framework for the reconstruction of incomplete
data sets
- Neurocomputing, 73, 3039-3065. Published online 9 September 2010, DOI
information: 10.1016/j.neucom.2010.06.021
- L.S. Smith, Neuromorphic
Systems: past, present and future
- in Brain Inspired Cognitive Systems, A. Hussain, I. Aleksander, L.S.
Smith, A.K. Barros, R. Chrisley, V. Cutsurdisis (eds), Springer Advances
in Experimental Medicine and Biology 657, 2010, pp 167-182.
- S. Shahid, J. Walker and L.S. Smith A
new spike detection algorithm for extracellular neural recordings
- IEEE Transactions on Biomedical Engineering, 57(4), 853-866, April
2010.
- I.A. Gheyas, L.S. Smith, Feature
subset selection in large dimensionality domains. Also available:
Final draft of paper on
Stirling Online Research Repository.
- Pattern Recognition, 43, 1, 5-13, January 2010.
- L.S. Smith and S. Shahid, Assessing
the effectiveness of Cepstrum of Bispectrum based spike detection on
simultaneously recorded intra- and extra- cellularly recorded data
- presented at Society for Neuroscience Meeting, Chicago, 14-17 October
2009.
- S. Shahid and L.S. Smith Cepstrum
of Bispectrum Spike Detection applied to Extracellular Signals with
Concurrent Intracellular Signals
- Presented at CNS 2009 Berlin, July 2009
- I.A. Gheyas, L.S. Smith A
Neural Network Approach to Time Series Forecasting
- presented at the 2009 International Conference of Computational
Statistics and Data Engineering (ICCSDE), part of the World Congress in
Engineering 2009 (London).
- I.A. Gheyas, L.S. Smith A
Novel Nonparametric Multiple Imputation Algorithm for Estimating
Missing Data
- presented at the 2009 International Conference of Computational
Statistics and Data Engineering (ICCSDE), part of the World Congress in
Engineering 2009 (London)
- S. Shahid, L.S. Smith, Extracellular
spike detection using Cepstrum of Bispectrum (powerpoint)
- presented at Society for Neuroscience Meeting, Washington DC, USA,
November 2008.
- M. Fletcher, B. Liang, L.S. Smith, A. Knowles, T. Jackson, K. Jessop,
J. Austin, Neural network
based pattern matching and spike detection tools and services - in the
CARMEN neuroinformatics project
- Neural Networks, 21, 8, 1076-1084, 2008.
- S. Shahid and L.S. Smith (2008) A
Novel Technique for Spike Detection in Extracellular
Neurophysiological Recordings using Cepstrum of Bispectrum
- presented at EUSIPCO 2008,
16th European Signal Processing Conference, August 25-29 2008.
- J. Huo, A.F. Murray, L.S. Smith, Z. Yang (2008) Adaptation
of Barn Owl Localization System with Spike Timing Dependent Plasticity
- WCCI 2008/2008 International Joint Conference on Neural Networks IEEE
Catalog Number: CFP08IJS-CDR ISBN: 978-1-4244-1821-3, ISSN: 1098-7576,
June 1-6, 2008, Hong Kong. pages 155-160, 2008.
- Giacomo Indiveri, R. Douglas, L.S. Smith (2008) Silicon
neurons. Scholarpedia, 3(3):1887
- Silicon neurons article in scholarpedia
- Leslie S. Smith Artificial
general intelligence: an organism and level based position statement
- position paper accepted for the Artificial
General Intelligence Conference (AGI-08), Memphis, March 2008.
- Leslie S. Smith, Shahjahan Shahid (University of Stirling, UK),
Anthony Vernier (Univ. de franche comte,France) Testing
spike detection techniques using synthetic data
- Poster presented at Society for Neuroscience Meeting, November 2007,
San Diego
- L.S. Smith, Neuronal
computing or computational neuroscience: brains vs. computers
- Seminar in Computational
Thinking Series, Department of Informatics, Edinburgh University,
October 17 2007.
- L. S. Smith, S. Shahid, A. Vernier, N. Mtetwa Finding
events in noisy signals
- The IET Irish Signals and Systems Conference 13-14 September 2007,
31-36, 2007 (ISBN 978 0 86341 847 1).
- L.S. Smith, J. Austin, S. Baker, R. Borisyuk, S. Eglen, J. Feng, K.
Gurney, T. Jackson, M. Kaiser, P. Overton, S. Panzeri, R. Quian Quiroga,
S.R. Schultz, E. Sernagor, V.A. Smith, T.V. Smulders, L. Stuart, M.
Whittington, C. Ingram. The
CARMEN e-Science pilot project: Neuroinformatics work packages.
- Proceedings of the UK e-Science All Hands Meeting 2007 10-13
September 2007 (ed: S. J. Cox), 591-598, 2007 (ISBN 978-0-9553988-3-4).
- Jenny Ure 1 , Rob Procter, Maryann Martone, David Porteous, Sharon Lloyd, Stephen Lawrie, Dominic Job, Richard Baldock, Alistair Philp, Dave Liewald, Frank Rakebrandt, Alan Blaikie, Clare McKay, Stuart Anderson, John Ainsworth, Jano van Hemert, Ignacio Blanquer, Richard Sinnott, Christian Barillot, Frank Bernard Gibaud, Alan Williams, Mark Hartswood, Paul Watson, Leslie Smith, Albert Burger, Jessie Kennedy, Horacio Gonzalez-Velez, Robert Stevens, Oscar Corcho, Robin Morton, Pamela Linksted, Mylene Deschenes, Mark McGilchrist, Paul Johnson, Alex Voss, Renate Gertz, Joanna Wardlaw, Data integration in eHealth: a domain/disease specific roadmap
- Studies in Health Technol Inform, 2007;126:144-53.
- L.S. Smith, S. Collins Determining
ITDs using two microphones on a flat panel during onset intervals with
a biologically inspired spike based technique
- IEEE Transactions of Audio, Speech and Language Processing, 15, 8,
2278-2286, (2007). The stimuli used may be found here.
- L.S. Smith, N. Mtetwa, A
tool for synthesizing spike trains with realistic interference
- Journal of Neuroscience Methods 159 (2007) 170-180
- L.S. Smith Building a synthetic sensory-motor system
- Originally presented at UK CRC Grand Challenges meeting, Edinburgh 2002, and updated in 2006. An over-the-top brief paper about extending life to new environments.
- L.S. Smith, Neuroinformatics:
what can E-Science offer Neuroscience (Or E-Science and Neuroscience:
Experimental, Computational and Cognitive)
- Keynote presentation at Brain Inspired Cognitive Systems 2006 (BICS
2006), Molyvos, Lesvos, Greece, October 2006.
- N. Mtetwa, L.S. Smith, Smoothing
and thresholding in neuronal spike detection
- Neurocomputing, 69, 10-12, pp 1366-1370, 2006
- L.S. Smith
Implementing Neural Models in Silicon
- Handbook of Nature-Inspired and Innovative Computing: Integrating
Classical Models with Emerging Technologies, ed A. Zomaya, Springer US,
2006, pp433-475
- C.S. Thomas , C.A. Howie and L.S. Smith, A New Singly Connected
Network Classifier based on Mutual Information, Intelligent Data
Analysis. Abstract
- Intelligent Data Analysis, Volume 9, Number 2, pp 189-205, 2005
- Leslie Smith and Dagmar Fraser, Onsets, autocorrelation functions and
spikes for direction based source separation (.pdf
of powerpoint slides) (Abstract
(JASA, 117, 4, p2485))
- Presented at ASA conference, Vancouver, May 2005.
- N. Mtetwa and L.S. Smith, Precision
constrained stochastic resonance in a feedforward neural network..
Abstract and reference data.
- IEEE Trans. Neural Networks, 16, 1, pp 250-262, 2005.
- K. Parussel and L.S. Smith, Cost
minimisation and Reward maximisation. A neuromodulating minimal
disturbance system using anti-hebbian spike timing-dependent
plasticity,
- in Proceedings of the symposium on agents that want and like,
motivational and emotional roots of cognition and action, pp 98-101,
AISB 2005, 12-15 April 2005, ISBN 1 902956 41 7.
- L.S. Smith, Towards Robot
Audition
- in Dynamic Perception, U.J. Ilg, H. Buelthoff, A Mallot (editors),
IOS press/infix, 15-20, 2004.
- L.S. Smith, D. S. Fraser, Robust
sound onset detection using leaky integrate and fire neurons with
depressing synapses,
- IEEE Transactions on Neural Networks, 15, 5, (Sept 2004), pp
1125-1134.
-
- Sound Signal Statistics,
- Leslie S Smith, poster presented at Gordon Research Conference,
Oxford, September 2004. I ought to try to turn it into a paper.
- Sound feature detection
using leaky integrate-and-fire neurons, Leslie S. Smith and Dagmar
S. Fraser
Submitted to NIPS 2003, but rejected. I still think it's good. - Neuron/Electronic
Interfacing: (warning: huge (13Mbyte) file) seminar presentation
- Seminar presented at Bioengineering Center, Georgia Institute of
Technology, Atlanta, Georgia, USA, 23 April 2003.
- Biologically inspired
robust onset detection (abstract), L.S. Smith,
- Journal of the Acoustical Society of America, 113, 4 (Part 2), p2198,
April 2003.
Presentation from
above meeting
- Stochastic resonance and finite
resolutions in a network of leaky integrate and fire neurons, N.
Mtetwa, L.S. Smith, A. Hussain,
- Artificial Neural Networks - ICANN 2002, edited by J. R. Dorronsoro,
Lecture Notes in Computer Science 2415, Springer 2002, pp 117-122.
- Phase-locked onset
detectors for monaural sound grouping and binaural direction finding
(abstract), L.S. Smith
- Journal of the Acoustical Society of America, 111, 5 (Part 2), p2467,
May 2002.
- Using IIDs to estimate sound
source direction L.S. Smith
- in From animals to animats 7, (eds: B. Hallam, D. Floreano, J. Hallam,
G. Hayes, J-A Meyer), MIT Press, pp60-61, 2002.
- Analogue VLSI Leaky
Integrated-and-fire Neurons and their Use in a Sound Analysis System,
Analog Integrated Circuits and Signal Processing, M.Glover, A.Hamilton
L.S.Smith,
- Special Issue: Microelectronics for Bio-inspired Systems (Selected
Papers from MicroNeuro'99 Conference), Guest Editors: Alberto Prieto and
Andreas Andreou, 30(2): 91-100 Feb 2002.
- Using depressing synapses for
phase locked auditory onset detection, L.S. Smith
- in Artificial neural Networks - ICANN 2001, edited by G. Dorffner, H.
Bischof, K. Hornik, Lecture Notes in Computer Science 2130, Springer,
2001.
- Method and apparatus for processing sound L.S. Smith (inventor)
-
World patent WO 00/001200 (WO 00001200), published 6 January 2000, (abandoned). International Patent Classification H04R 25/00, A1.
-
C. Breslin and L. S. Smith, Silicon Cellular Morphology
-
International Journal of Neural Systems, 9, 5, (Special Issue on Neuromorphic Systems), pp491-495, 1999
- A Comparison of a Hardware and a
Software Integrate and Fire Neural Network for Clustering Onsets in
Cochlear Filtered Sound (CRC), L.S. Smith, M.A, Glover, A.
Hamilton.
- Accepted (poster) for Workshop on Neural Networks for Signal
Processing, Aug 31-Sept 3, Cambridge, 1998: published in Neural
Networks for Signal Processing VIII, Proceedings of the 1998
Workshop, edited by T. Constantinides, S. Y. Kung, M. Niranjan, E.
Wilson, IEEE cat 98th8378.
Onset clustering (a mechanism for sound segmentation) uses
integrate-and-fire neurons to perform across spectrum and across time
clustering of increases in sound intensity in different parts of the
spectrum. We show that a network of recently developed analogue VLSI
integrate-and-fire neurons can perform this task in real-time, and
compare its performance with a simulated network.
- A One-dimensional
Frequency Map Implemented using a Network of Integrate-and-fire
Neurons (CRC), L.S. Smith
- Accepted (poster) for ICANN 98, Skovde , September 2-4 1998.
Published in ICANN 98: Proceedings of the 8th International
Conference on Artificial Neural Networks, Skovde, Sweden, 2-4
September 1998, Springer, Perspectives in Neural Computing Series,
Volume 2, p991-996, ISBN 3 540 76293 9.
A network of integrate-and-fire units (consisting of five excitatory
units and one inhibitory unit) is shown to implement a one dimensional
frequency map over one octave (80 - 160Hz). The network has a
biologically plausible structure, conforming to Dale's law, and using
plausible synaptic and axonic timings.
- Reinforcement Landmark Learning P.Toombs, W.A. Phillips, L.S. Smith
- Accepted for SAB
98, 17-21 August, Zurich, Switzerland
- An analog VLSI
integrate-and-fire neural network for sound segmentation (CRC),
M.A. Glover, A. Hamilton, and L.S. Smith
- Accepted for NC
98, Vienna 23-25 September 1998
This paper presents a cascadable aVLSI integrate-and-fire neural
network chip (SPIKE I) capable of realistic biological time constants
incorporated into a real time software based sound segmentation system
with results. The sound segmentation system is based on an engineering
abstraction of the functionality of the cochlea and auditory nerve. A
comparison of the software simulation and software/hardware
combination results indicates that clustering does occur. Furthermore
the patterns of onsets and offsets generated are broadly similar.
Analysis of the results indicates area's for improvement. These have
been included in a second integrate-and-fire neural network chip
(SPIKE II) presently being fabricated.
- Adding lateral inhibition to a
simple feedforward network enables it to perform exclusive--or.
Smith L.S.
- Neural Computation, 10, 2, 277-280, 1998
A simple laterally inhibited recurrent network which implements
exclusive--or is demonstrated. The network consists of two mutually
inhibitory units with logistic output function each receiving one
external input, and each connected to a simple threshold output unit.
The mutually inhibitory units settle into a point attractor. We
investigate the range of steepness of the logistic, and the range of
inhibitory weights for which the network can perform exclusive--or.
- A Noise-robust Auditory
Modelling Front End for Voiced Speech Smith L.S.
- in Gerstner W., Germond A., Hasler M., Nicoud J-D (eds)
Artificial Neural Networks - ICANN97, Lecture Notes in Computer
Science 1327, pp 97-102, Springer-Verlag, Heidelberg, 1997, ISSN
0302-9743, ISBN 3-540-63631-5.
A method for detecting and displaying voiced elements of speech
using amplitude modulated pulses due to unresolved harmonics of the
excitation frequency (fundamental) is presented. It uses an auditory
model consisting of a gammatone filterbank (modelling the basilar
membrane), simple rectification (modelling the organ of Corti inner
hair cells), envelope bandpass filters (modelling some spiral ganglion
neuron effects) and amplitude modulation detectors (modelling certain
cell populations in the cochlear nucleus). We demonstrate that it can
display a pattern of activity across the spectrum and across time that
describes the energy distribution in voiced speech, and that this
pattern degrades slowly in the presence of non-speech noise.
- Extracting Features from the
Short-term Time Structure of Cochlear Filtered SoundSmith L.S.
- in: John A. Bullinaria, David W. Glasspool & George Houghton
(1998). Proceedings of the Fourth Neural Computation and Psychology
Workshop: London, 9-11 April 1997 Connectionist Representations,
pp113-125. London: Springer-Verlag.
Auditory modelling uses the architecture of the auditory system to
guide early sound processing. The advantage of this approach is (i)
time-resolution is better and (ii) many bandpassed channels are
available and can be processed in parallel. Good time-resolution
allows sophisticated across-time processing to be applied to each
channel, resulting in the discovery of features in each channel.
Logically each channel can be processed simultaneously. The features
discovered can be correlated across channels. We present some early
results for processing sound at three different levels of short-term
time structure.
- Using a Framework to Specify a
Network of Temporal NeuronsSmith L.S.
- Paper presented at 1st Slovak Symposium on Neural Networks and their
Applications, November 11-13 1996, Herlany, Slovakia.
We discuss the use of frameworks (or formal models) for networks of
temporal neurons, that is, neural networks using neurons in which
precise signal timing matters. After discussing why one might require
a framework at all, we review existing frameworks, and discuss the
limitations of existing frameworks for their application to this more
general form of neural network. With the aid of an example (a
recurrent network of integrate-and-fire neurons) we show how one
framework can be applied to this general form of neural network.
- A neurally motivated
technique for voicing detection in speech. (poster abstract)Smith
L.S.
- Poster presented at British Society of Audiology short papers
meeting, Cambridge, England, September 1996. Published as Smith L.S., A
neurally motivated technique for voicing detection in speech,
(abstract), British Journal of Audiology, Vol 31, No 2, p112, 1997.
Envelope amplitude modulation occurs in cochlear filtered speech
because of unresolved harmonics. The abstract is a brief introduction
to the CCCN Technical Report 22, July 1996.
- A Neurally Motivated Technique
for Voicing Detection and F0 Estimation for Speech.Smith
L.S.
- CCCN Tech Report 22, July 1996.
Speech consists of alternating voiced and unvoiced sections. Voiced
speech consists of multiple harmonics of some fundamental ($F_{0}$);
unvoiced speech consists of silence, or filtered noise. Here, speech
is wideband bandpass filtered into many bands (modelling the cochlea).
Each filter output is rectified (modelling the organ of Corti hair
cell action), and bandpass filtered by convolution with the difference
between two Gaussian averaging functions. This detects and emphasises
the amplitude modulation resulting from unresolved harmonics (and
models the combined effect of the auditory nerve and certain cochlear
nucleus cell types). This output is compressed, summed across the
bands, then used to discover glottal pulses. The presence of glottal
pulses signals voicing, and the time between glottal pulses is used to
find $F_{0}$. Results show good performance, particularly on male
speakers. The system is reasonably resistant to background noise.
- Using an Onset-based
Representation for Sound SegmentationSmith L.S.
- Using an onset-based representation for sound segmentation, p
274-281, Neural networks and their applications, Marseilles, March
20-22, 1996.
We present a technique for using pre-processing based on mammalian
early auditory processing to produce a segmentation of sound based on
onsets and offsets. The sound signal is bandpassed and each band
processed to enhance onsets and offsets. The onset and offset signals
are compressed, then clustered both in time and across frequency
channels using a network of integrate-and-fire neurons. A spike-based
representation of onsets and offsets is produced, and the timing of
these spikes used to segment the sound. By considering spikes in
varying number of bands, a multi-level segmentation tree can be built.
This tree is a purely data-driven representation of the segmental
structure of the sound.
- Onset-based
Sound SegmentationSmith L.S.
- Onset based sound segmentation, pp 729--735, in Touretzky
D.S., Mozer M.C., Hasselmo M.E. (eds) Advances in Neural Information
Processing Systems 8 (Proceedings of the 1995 Conference), MIT Press,
1996.
A technique for segmenting sounds using processing based on
mammalian early auditory processing is presented. The technique is
based on features in sound which neuron spike recording suggests are
detected in the cochlear nucleus. The sound signal is bandpassed and
each signal processed to enhance onsets and offsets. The onset and
offset signals are compressed, then clustered both in time and across
frequency channels using a network of integrate-and-fire neurons.
Onsets and offsets are signalled by spikes, and the timing of these
spikes used to segment the sound.
- A simple model of amplitude
modulation detection. (poster abstract)Smith L.S.
- Poster presented at British Society of Audiology short papers
meeting, Oxford, England, September 1995. Published as Smith L.S., A
simple model of amplitude modulation detection, (abstract) ,
British Journal of Audiology, 30, 2, 1996.
Deterioration of hearing at high frequencies leads to problems in
speech interpretation in noise. One candidate for a carrier of useful
information at higher frequencies is amplitude modulation (AM) found
in wideband bandpassed voiced speech due to unresolved F0 harmonics.
Taking an approach based in auditory modelling, we seek to identify
(and eventually characterise) voiced sounds.
- Synchronization of
Integrate-and-fire Neurons with Delayed Inhibitory Lateral
Connections.Smith L.S., Nischwitz A., Cairns D.E.
- Synchronization of integrate-and-fire neurons with delayed
inhibitory lateral connections, pp142-145, Proceedings of ICANN94,
edited by M.Marinaro and P.G.Morasso, Springer-Verlag, 1994.
Integrate-and-fire (leaky integrator) neurons are both
mathematically tractable and have a degree of biological plausibility.
Systems of two neurons, interacting via symmetric pulsatile coupling
with zero delay and zero absolute refractory period have been studied
by Mirollo and Strogatz. For positive coupling, they found two fixed
points, an unstable one with the units out of phase, and a stable one
with the units in phase. For negative coupling, the stable and
unstable fixed points are reversed, if a refractory period is assumed.
- Sound Segmentation Using Onsets and Offsets, Smith L.S.
- Journal of New Music Research, 23, 1, 11-23, March 1994.
- Neural Networks, Free
Association, and Errors, Smith L.S.
- Poster summary, from AISB 1993.
A speculative discussion of the form a neural network might have if
it was to display some of the characteristics Freud describes in his
Psychology of Errors, and of free association.
- Position Paper: Processing sound
for interpretation.
- CCCN Technical Report CCCN-17, September 1993
By taking an ecological view of sound perception strongly influenced
by J.J. Gibson, we consider what the sound itself can usefully tell us
about the source. We are therefore interested in extracting
appropriate stimulus information. Since we also believe that low-level
human auditory processing is independent of the nature of the sound,
be it speech or not, we are interested in how the low-level human
auditory system extracts such information. The eventual aim of this
work is synthetic sound interpretation systems which can perform the
simple tasks which we take for granted as humans. A brief description
of a programme of research is included.
- A Framework for Neural Net
Specification, Smith L.S.
- IEEE Transactions on Software Engineering, 18(7), 601-612, July 1992.
Paper describing a notation for the specification of neural nets.
- A Hardware Random Number
Generator for Transputer Systems, Smith L.S., Kelly F.,
- Occam User Group Newsletter, No 14, 43-45, January 1991. Short paper
describing a hardware random number generator.