Signal Processing and Speech Communication Laboratory


In 2000, the Signal Processing and Speech Communication Laboratory (SPSC Lab) of Graz University of Technology (TU Graz) was founded as a research and education center in nonlinear signal processing and computational intelligence, algorithm engineering, as well as circuits & systems modeling and design. It covers applications in wireless communications, speech/audio communication, and telecommunications.

If you want to learn more about Signal Processing, click: What is Signal Processing?

The Research of SPSC Lab addresses fundamental and applied research problems in five scientific areas:

Result of the Month

Training Discrete-Valued Neural Networks with Sign Activations Using Weight Distributions [link]

Since resource-constrained devices hardly benefit from the trend towards ever-increasing neural network (NN) structures, there is growing interest in designing more hardware-friendly NNs. In this paper, we consider the training of NNs with discrete-valued weights and sign activation functions that can be implemented more efficiently in terms of inference speed, memory requirements, and power consumption. We build on the framework of probabilistic forward propagations using the local reparameterization trick, where instead of training a single set of NN weights we rather train a distribution over these weights. Using this approach, we can perform gradient-based learning by optimizing the continuous distribution parameters over discrete weights while at the same time perform backpropagation through the sign activation. In our experiments, we investigate the influence of the number of weights on the classification performance on several benchmark datasets, and we show that our method achieves state-of-the-art performance.

Contact: Wolfgang Roth

Latest News

Check out INTERSPEECH 2019, the 20th Annual Conference of the International Speech Communication Association, which will be held in Graz, Austria between 15 and 19 September, 2019.

15 Oct 2019 Student Projects Information Event: 18.10., 15:00 (BSc SP; MSc Project and Master Theses)

25 Sep 2019 PhD Position in Machine Learning!

07 Aug 2019 Start of 4-year FWF project on conversational speech

06 May 2019 New Website Launched!

01 Jan 2019 PhD Positions in Wireless Communications and Positioning

05 Oct 2018 Florian Muralter wins DEGA-Studienpreis

01 Sep 2018 Student Projects Informatioin Event: 12.10., 14:30 (BSc SP; MSc Project and Master Theses)

Check older news here.