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On-Line Noise Suppression for Enhancing Speech Recognition

100%
Urbanowicz K., Fronczak P., Hołyst J.
Acta Physica Polonica A
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2009
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vol. 116
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issue 2
119-126
EN
An experimental setup has been designed that makes possible a real-time noise reduction and an increase of automatic word recognition rate. The applied algorithm uses a dynamical filtering method for investigated time-series and has been implemented in Spartan 3 FPGA evaluation board RC10 made by Celoxica. We show that our approach increases the number of correctly recognized words in the commercial speech recognition program ViaVoice 10.
2
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A Simple Model of Local Prices and Associated Risk Evaluation

100%
Urbanowicz K., Hołyst J., Richmond P.
Acta Physica Polonica A
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2008
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vol. 114
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issue 3
501-506
EN
A simple spin system is constructed to simulate dynamics of asset prices and studied numerically. The outcome for the distribution of prices is shown to depend both on the dimension of the system and the introduction of price into the link measure. For dimensions below 2, the associated risk is high and the price distribution is bimodal. For higher dimensions, the price distribution is Gaussian and the associated risk is much lower. It is suggested that the results are relevant to rare assets or situations where few players are involved in the deal making process.
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