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Parametric Cochlea implemented in FPGA

Parametric Cochlea implemented in FPGA. Input signal. Generated events. Zero crossing. Median Filter. Threshold/ S Trigger. N IIR filters. Energy extraction. …. …. …. Abs and S/H. MAC based filters. Thresholds. Parameters. Clock frequency Sampling frequency

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Parametric Cochlea implemented in FPGA

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  1. Parametric Cochlea implemented in FPGA Input signal Generated events Zero crossing Median Filter Threshold/ S Trigger N IIR filters Energy extraction … … … Abs and S/H MAC based filters Thresholds Parameters • Clock frequency • Sampling frequency • Number of filters (power of 2) • Input/Output/Coefficients precision. • Central frequencies. • How many times we downsample. • Number of Taps for the median filter • Thresholds. • Delay.

  2. Inspired by: “Cochlear innervation in the greater horseshoe bat: Demonstration of an acoustic FOVEA.” VolkmarBruns and EdeltrautSchmieszek (1980)

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