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New and Used Bills Classification Using Neural Networks

Dongshik KANG, Sigeru OMATU, Michifumi YOSHIOKA

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Summary :

Classification of the new and used bills using the spectral patterns of raw time-series acoustic data (observation data) poses some difficulty. This is the fact that the observation data include not only a bill sound, but also some motor sound and noise by a transaction machine. We have already reported the method using adaptive digital filters (ADFs) to eliminate the motor sound and noise. In this paper, we propose an advanced technique to eliminate it by the neural networks (NNs). Only a bill sound is extracted from observation data using prediction ability of the NNs. Classification processing of the new and used bills is performed by using the spectral data obtained from the result of the ADFs and the NNs. Effectiveness of the proposed method using the NNs is illustrated in comparison with former results using ADFs.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E82-A No.8 pp.1511-1516
Publication Date
1999/08/25
Publicized
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DOI
Type of Manuscript
Special Section PAPER (Special Section on Digital Signal Processing)
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