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.