Dr Ulrich Matthias Speidel

MSc, PhD

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Senior Lecturer


  • 1992: Came to NZ with the equivalent of a BSc from Germany. Undertook MSc studies in physics at the University of Auckland. The thesis was about signal processing for underwater acoustics used in a climatology experiment.
  • 1994: Graduated MSc with 1st Class Honours. Later in that year, I started a PhD under Mark Titchener, on T-Codes.
  • 1998: Finished PhD thesis and started my own consulting company, Technology Transfer Consulting Ltd. Did a bit of web work and more technical translations than you could shake a babelfish at. Customers include The University of Auckland and O'Reilly, Germany, for whom I translated Jerry Bradenbaugh's "JavaScript Application Cookbook" into German, as well as a number of chapters from "Perl in a Nutshell". Graduated with my PhD at the end of the year.
  • 2000: Got bored with just business and decided to get back into academia. That's why I'm here.

More on my home page

Research | Current

  • Anything that's fun!
  • T-Codes and T-information theory
    To understand T-information theory, you'll need to understand T-Codes. To understand T-Codes, you must first understand T-Codes. If this confuses you, talk to me.
  • Complexity in time series data and the use of information measures in detection and decision-making, e.g., in the detection of network events or similarity comparisons in noisy data
  • Sustainabilty of real-time protocols on the Internet
    Ever wondered why VoIP applications such as Skype seem to continue to (just) work on Internet infrastructure that wasn't built for it? So am I, and I'm trying to find out as part of a large international experiment just how sustainable it all is.
  • Network coding over satellite and other long latency links
    Did you know that Internet via satellite often doesn't use the expensive satellite link very efficiently? Network coding can help.
  • Web application programming and security

Teaching | Current

Currently: COMPSCI220 Algorithms and Data Structures, COMPSCI280 Enterprise Application Programming, COMPSCI314 Modern Data Communications

Postgraduate supervision

I'm always looking for cool frills to add to my research, so if you're keen to get your hands wet on HTML, JavaScript and PHP, talk to me.


Tuakana coordinator for Computer Science, along with David Welch

Areas of expertise

Data communications, information theory, network measurement, codes, data compression, signal processing, network coding, web applications, web security

Committees/Professional groups/Services


Selected publications and creative works (Research Outputs)

  • Rebenich, N., Gulliver, T. A., Neville, S., & Speidel, U. (2017). An analog of the prime number theorem for finite fields via truncated polylogarithm expansions. Mathematics of Computation, 1-1. 10.1090/mcom/3247
  • Speidel, U. M., Qian, L., Cocker, E., Vingelmann, P., Heide, J., & Médard M (2016). Making the best of satellite links to Pacific Islands. Paper presented at APRICOT 2016: APNIC 41, Auckland, N.Z.. 15 February - 26 February 2016. Related URL.
    URL: http://hdl.handle.net/2292/34850
    Other University of Auckland co-authors: Lei Qian
  • Speidel, U. M., Gulliver, A., Makhdoumi, A., & Médard M (2014). Using T-Codes as Locally Decodable Source Codes. In U. Mitra, E. Viterbo (Eds.) 2014 IEEE Information Theory Workshop, 218-222. Hobart, Australia. 10.1109/ITW.2014.6970824
    URL: http://hdl.handle.net/2292/25012
  • Cocker, E., Ghazzi, F., Speidel, U. M., Dong, M.-C., Wong, V., Vinck, A., ... Ferreira, H. (2014). Measurement of buffer requirement trends for real time traffic over TCP. 2014 IEEE 15th International Conference on High Performance Switching and Routing (HPSR), Vancouver. 10.1109/HPSR.2014.6900891
    URL: http://hdl.handle.net/2292/25011
  • Speidel, U. (2014). An Extended Similarity Distance for Use with Computable Information Estimators. Paper presented at International Symposium on Information Theory and its Applications (ISITA), Melbourne, AUSTRALIA. 26 October - 29 October 2014. 2014 INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY AND ITS APPLICATIONS (ISITA). (pp. 5).
  • Manoharan, S., Master, A., & Speidel, U. (2014). Complexity-based Steganalysis. Paper presented at International Symposium on Information Theory and its Applications (ISITA), Melbourne, AUSTRALIA. 26 October - 29 October 2014. 2014 INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY AND ITS APPLICATIONS (ISITA). (pp. 5).
    URL: http://hdl.handle.net/2292/24415
    Other University of Auckland co-authors: Sathiamoorthy Manoharan
  • Cocker, E., Speidel, U., Rebenich, N., Neville, S., Gulliver, A., Eimann, R., ... Dong, M. C. (2013). Measurement of Packet Train Arrival Conditions in High Latency Networks. Paper presented at International Conference on Information, Communications and Signal Processing (ICICS), Tainan, Taiwan. 10 December - 13 December 2013. Information, Communications and Signal Processing (ICICS) 2013 9th International Conference on. 10.1109/ICICS.2013.6782947
  • Speidel, U. M., & Cocker, E. (2013). Hosting a beacon. 1-10. Related URL.


Contact details

Primary location

Level 5, Room 594
New Zealand

Web links