Signal Processing and Speech Communication Laboratory
home › people › Bernhard Geiger

Bernhard Geiger

Room number
IDEG080
Telephone number
  • office: +43 316 873 - 4480
Position
Assistant Professor
Email
geiger@tugraz.at
Research interests

Theory-Assisted Machine Learning, Hybrid Modelling, Information Theory for Signal Processing and Machine Learning, Fundamental Understanding and Limitations of Machine Learning Methods,

Bernhard C. Geiger received the Dipl.-Ing. degree in Electrical Engineering (with distinction), the Dr. techn. degree in Electrical and Information Engineering (with distinction), and the venia docendi in Theoretical Information Engineering from Graz University of Technology, Austria, in 2009, 2014, and 2023, respectively. In 2010, he joined the Signal Processing and Speech Communication Laboratory, Graz University of Technology, as a Research and Teaching Associate. He was a Senior Scientist and Erwin Schrodinger Fellow at the Institute for Communications Engineering, Technical University of Munich, Germany from 2014 to 2017. Since 2024, he is on the Tenure Track for the Professorship on Hybrid Physics-based and Data-driven Modeling and Simulation of Complex Mechanical or Electrical Engineering Systems within the FoE Sustainable Systems. He is furthermore Key Researcher at Know Center Research GmbH, Graz, Austria, where he leads the research area on Methods & Algorithms for Artificial Intelligence.

My Erdös number is 3, thanks to a joint “publication” with Wolfgang Woess in the Research News of Graz University of Technology. My Shannon distance is 4, thanks to Onur Günlü, Gerhard Kramer, and Robert Gallager.

For my most recent publications, please take a look at

PhD Thesis
Publications
  • Journal article Linke J., Geiger B., Kubin G. & Schuppler B. (2025) What’s so complex about conversational speech? A comparison of HMM-based and transformer-based ASR architectures. in Computer Speech and Language , 90. [more info] [doi]
  • Journal article Hoffer J., Geiger B. & Kern R. (2024) Robust Bayesian target vector optimization for multi-stage manufacturing processes. in Computational Materials Science, 244. [more info] [doi]
  • Journal article Rohrhofer F., Posch S., Gößnitzer C., García-Oliver J. & Geiger B. (2024) Utilizing neural networks to supplant chemical kinetics tabulation through mass conservation and weighting of species depletion. in Energy and AI, 16. [more info] [doi]
  • Abstract Rohrhofer F., Steger S., Posch S., Gößnitzer C. & Geiger B. (2023) Training gives me PINNs and needles – on the complexity of training physics-informed neural networks.. [more info]
  • Abstract Rohrhofer F., Steger S., Posch S., Gößnitzer C. & Geiger B. (2023) Training gives me PINNs and needles – on the complexity of training physics-informed neural networks.. [more info]
  • Conference paper Posch S., Gößnitzer C., Rohrhofer F., Geiger B. & Wimmer A. (2023) Finding the Optimum Design of Large Gas Engines Prechambers using CFD and Bayesian Optimization. in Scientific Computing 2023 (pp. 160 - 168). [more info]
  • Conference paper Rohrhofer F., Posch S., Gößnitzer C., García-Oliver J. & Geiger B. (2023) Bringing Chemistry to Scale: Loss Weight Adjustment for Multivariate Regression in Deep Learning of Thermochemical Processes. in Scientific Computing 2023 (pp. 4 - 11). [more info]
  • Conference article Kefalas A., Ofner A., Posch S., Pirker G., Gößnitzer C., Geiger B. & Wimmer A. (2023) A Comparison of Virtual Sensors for Combustion Parameter Prediction of Gas Engines Based on Knock Sensor Signals.. [more info] [doi]
  • Journal article Rohrhofer F., Posch S., Gößnitzer C. & Geiger B. (2023) On the Role of Fixed Points of Dynamical Systems in Training Physics-Informed Neural Networks. in Transactions on Machine Learning Research, 2023(1). [more info]
  • Review article Gabler P., Geiger B., Schuppler B. & Kern R. (2023) Reconsidering Read and Spontaneous Speech: Causal Perspectives on the Generation of Training Data for Automatic Speech Recognition.. [more info] [doi]
  • Journal article Ofner A., Kefalas A., Posch S., Pirker G. & Geiger B. (2023) In-cylinder pressure reconstruction from engine block vibrations via a branched convolutional neural network. in Mechanical Systems and Signal Processing, 183. [more info] [doi]
  • Journal article Ofner A., Kefalas A., Posch S. & Geiger B. (2022) Knock Detection in Combustion Engine Time Series Using a Theory-Guided 1-D Convolutional Neural Network Approach. in IEEE/ASME Transactions on Mechatronics, 27(5), p. 4101-4111. [more info] [doi]
  • Journal article Toth C., Helic D. & Geiger B. (2022) Synwalk: community detection via random walk modelling. in Data Mining and Knowledge Discovery, 36(2), p. 739-780. [more info] [doi]
  • Anthology Geiger B. & Kubin G. (2021) Information Bottleneck - Theory and Applications in Deep Learning.. [more info] [doi]
  • Journal article Kefalas A., Ofner A., Pirker G., Posch S., Geiger B. & Wimmer A. (2021) Detection of Knocking Combustion Using the Continuous Wavelet Transformation and a Convolutional Neural Network. in Energies, 14(2). [more info] [doi]
  • Conference paper Hobisch E., Scholger M., Fuchs A., Geiger B., Koncar P. & Saric S. (2020) Behind the Scenes of the Spectators: Uncovering Anonymous Authors in Periodicals of the Enlightenment.. [more info]
  • Editorial Geiger B. & Kubin G. (2020) Information Bottleneck: Theory and Applications in Deep Learning.. [more info] [doi]
  • Conference paper Klimashevskaia A., Geiger B., Hagmüller M., Helic D. & Fischer F. (2020) "To be or not to be central" - On the Stability of Network Centrality Measures in Shakespeare's "Hamlet". in 15th Annual International Conference of the Alliance of Digital Humanities Organizations. [more info]
  • Conference paper Schrunner S., Geiger B., Zernig A. & Kern R. (2020) A generative semi-supervised classifier for datasets with unknown classes. in The 35th ACM/SIGAPP Symposium On Applied Computing (pp. 1066-1074). [more info] [doi]
  • Journal article Amjad R. & Geiger B. (2020) Learning Representations for Neural Network-Based Classification Using the Information Bottleneck Principle. in IEEE Transactions on Pattern Analysis and Machine Intelligence, 42(9), p. 2225-2239. [more info]
  • Journal article Amjad R., Blöchl C. & Geiger B. (2020) A Generalized Framework For Kullback-Leibler Markov Aggregation. in IEEE Transactions on Automatic Control, 65(7), p. 3068-3075. [more info] [doi]
  • Conference paper Toller M., Geiger B. & Kern R. (2019) A Formally Robust Time Series Distance Metric.. [more info]
  • Conference paper Geiger B. & Koch T. (2018) On the Information Dimension Rate of Multivariate Gaussian Processes. in International Zurich Seminar on Information and Communication (pp. 56-60). [more info] [doi]
  • Journal article Geiger B. (2018) The Fractality of Polar and Reed–Muller Codes. in Entropy, 20(1). [more info] [doi]
  • Book Geiger B. & Kubin G. (2018) Information Loss in Deterministic Signal Processing Systems. 1 ed., 145 p. ({"formatted"=>true, "value"=>"Understanding Complex Systems"}). [more info] [doi]
  • (Old data) Lecture or Presentation Geiger B. & Amjad R. (2017) Community Detection in Shakespeare’s Plays. Classic and Information-Theoretic Approaches.. [more info]
  • Conference paper Geiger B. & Kubin G. (2014) Information Loss and Anti-Aliasing Filters in Multirate Systems. in International Zurich Seminar on Communications (pp. 148-151). [more info] [doi]
  • Conference paper Casapicola P., Poelzl M. & Geiger B. (2014) A MATLAB-Based Magnitude Response Game for DSP Education. in 2014 IEEE International Conference on Acoustics, Speech, and Signal Processing (pp. 2214-2218). [more info]
  • Conference paper Geiger B. & Kubin G. (2014) Information-Maximizing Prefilters for Quantization. in 2014 IEEE International Conference on Acoustics, Speech, and Signal Processing (pp. 4968-4972). [more info]
  • (Old data) Lecture or Presentation Geiger B. & Kubin G. (2013) Information Loss for Optimal Filter Design.. [more info]
  • Conference paper Peharz R., Geiger B. & Pernkopf F. (2013) Greedy Part-wise Learning of Sum-Product Networks. (pp. 612-627). [more info]
  • Conference paper Aichinger P., Schneider-Stickler B., Bigenzahn W., Fuchs A., Geiger B., Hagmüller M. & Kubin G. (2013) Double pitch marks in diplophonic voice. in 2013 IEEE International Conference on Acoustics, Speech, and Signal Processing (pp. xx-xx). [more info]
  • Conference paper Geiger B. & Temmel C. (2013) Information-Preserving Markov Aggregation. in IEEE Information Theory Workshop (pp. 258-262). [more info] [doi]
  • Conference paper Geiger B. & Kubin G. (2013) Signal Enhancement as Minimization of Relevant Information Loss. in International ITG Conference on Systems, Communication and Coding (pp. 1-6). [more info]
  • Journal article Geiger B. & Vogel C. (2013) Influence of Doppler Bin Width on GPS Acquisition Probabilities. in IEEE Transactions on Aerospace and Electronic Systems, 49(4), p. 2570-2584. [more info] [doi]
  • Conference paper Geiger B. & Kubin G. (2012) On the Information Loss in Memoryless Systems: The Multivariate Case. in International Zurich Seminar on Communications (pp. 32-35). [more info] [doi]
  • Conference paper Leitinger E., Geiger B. & Witrisal K. (2012) Capacity and capacity-achieving input distribution of the energy detector. in IEEE International Conference on Ultra-Wideband (pp. 57-61). [more info] [doi]
  • Conference paper Geiger B. & Kubin G. (2012) Relative Information Loss in the PCA. in IEEE Information Theory Workshop (pp. 567-571). [more info] [doi]
  • Journal article Geiger B., Vogel C. & Soudan M. (2012) A Comparison Between Ratio Detection and Threshold Comparison for GNSS Acquisition. in IEEE Transactions on Aerospace and Electronic Systems, 48(2), p. 1772-1779. [more info] [doi]
  • Conference paper Geiger B., Feldbauer C. & Kubin G. (2011) Information Loss in Static Nonlinearities. in International Symposium on Wireless Communication Systems (pp. 799-803). [more info]
  • Conference paper Geiger B. & Kubin G. (2011) Some Results on the Information Loss in Dynamical Systems. in International Symposium on Wireless Communication Systems (pp. 794-798). [more info]
  • Journal article Nadeem F., Geiger B., Leitgeb E., Muhammad S., Loeschnigg M. & Kandus G. (2011) Comparison of link selection algorithms for free space optics/radio frequency hybrid network. in IET Communications, 5, p. 2751-2759. [more info] [doi]
  • (Old data) Lecture or Presentation Geiger B., Gigl T. & Witrisal K. (2010) Enhanced-Accuracy Channel Estimation and Ranging Using IR-UWB Energy Detectors.. [more info]
  • Conference paper Geiger B., Soudan M. & Vogel C. (2010) On the Detection Probability of Parallel Code Phase Search Algorithms in GPS Receivers. in IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (pp. 864-869). [more info]
  • Conference paper Geiger B., Gigl T. & Witrisal K. (2010) Enhanced-Accuracy Channel Estimation and Ranging for IR-UWB Energy Detectors. in IEEE International Conference on Ultra-Wideband (pp. 513-518). [more info]
  • Conference paper Berglez P., Seybold J., Geiger B., Soudan M., Vogel C., Abart C., Singh A. & Hofmann-Wellenhof B. (2010) Development of a Dual Frequency Software-based GNSS Receiver. in ION GNSS (pp. 1967-1974). [more info]
  • Conference paper Soudan M. & Geiger B. (2010) On the Averaging Correlation for Satellite Acquisition in Software Defined Radio Receivers. in ION GNSS (pp. 3284-3289). [more info]
  • (Old data) Lecture or Presentation Geiger B., Gigl T. & Witrisal K. (2009) Ranging in the IEEE 802.15.4a Using Energy Detectors.. [more info]
  • Conference paper Nadeem F., Geiger B., Loeschnigg M., Leitgeb E., Henkel M., Awan M., Motlagh A. & Kandus G. (2009) Switch over implementation and analysis for hybrid wireless network of optical wireless and GHz links. in Wireless Telecommunications Symposium (pp. 1-5). [more info] [doi]
  • Conference paper Gigl T., Buchgraber T., Geiger B., Adalan A., Preishuber-Pfluegl J. & Witrisal K. (2009) Pathloss and Delay-Spread Analysis of Multipath Intensive Environments using IEEE 802.15.4a UWB Signals. in COST 2100 Management Committee Meeting. [more info]
  • Conference paper Nadeem F., Geiger B., Henkel M., Leitgeb E., Awan M., Gebhart M. & Kandus G. (2009) Comparison of wireless optical communication availability data and traffic data. in IEEE Vehicular Technology Conference (pp. 1-5). [more info]
  • Conference paper Nadeem F., Henkel M., Geiger B., Leitgeb E., Awan M. & Kandus G. (2009) Implementation and Analysis of Load Balancing Switch over for Hybrid Wireless Network. in IEEE Wireless Communications and Networking Conference. [more info]
  • Conference paper Nadeem F., Geiger B., Leitgeb E., Awan M. & Kandus G. (2009) Evaluation of Switch-Over Algorithms for Hybrid FSO-WLAN Systems. in Wireless VITAE (pp. 565-570). [more info]
  • Conference paper Geiger B. (2009) Ranging in the IEEE 802.15.4a Standard Using Energy Detectors. in EUROCON (pp. 1948-1955). [more info] [doi]
  • Journal article Nadeem F., Gebhart M., Leitgeb E., Awan M., Geiger B., Henkel M. & Kandus G. (2009) Performance Analysis of Throughput Efficient Switch-over between FSO and mmW Links. in Journal of Communications Software and Systems, 5(1), p. 19-25. [more info] [doi]
  • Journal article Geiger B., Gigl T., Preishuber-Pfluegl J. & Witrisal K. (2009) Experimental Characterization of System Parameters for Ranging in IEEE 802.15.4a using Energy Detectors. in Radioengineering, 18(3), p. 249-257. [more info]