Parametric Cochlea implemented in FPGA

Post on 23-Feb-2016

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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 - PowerPoint PPT Presentation

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Parametric Cochlea implemented in FPGA

N IIR filters …

MAC based filters

Parameters• Clock frequency• Sampling frequency•Number of filters (power of 2)•Input/Output/Coefficients precision.•Central frequencies.

Inputsignal Zero crossing

Energy extraction

Abs and S/H

• How many times we downsample.

MedianFilter

• Number of Taps for the median filter

Threshold/S Trigger

•Thresholds.•Delay.

Generatedevents

Thresholds

Inspired by:“Cochlear innervation in the greater horseshoe bat: Demonstration of an acoustic FOVEA.” Volkmar Bruns and Edeltraut Schmieszek (1980)