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Digital Hardware Implementation of Neuromorphic Pitch Extraction System

S.C. Lim, A.R. Temple, S.R. Jones, Dept of Electronic and Electrical Engineering, Loughborough University, Leicestershire LE11 3TU, England.

This article reports on the work of implementing a digital neuromorphic pitch extraction system. This system is based on the four layer pitch system model by Hewitt et. al. The system is capable of detecting the modulation frequency of a modulated input stimulus which to the human ear can be perceived as pitch. Each of the essential components in the system has been implemented in FPGA and a representative section was also implemented in synthesisable VHDL. The simulation results shows good correspondence to physiological data.

Dr L S Smith (Staff)
Tue Dec 2 14:23:49 GMT 1997