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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)