Comparison Study of Hamming and Kaiser Window over Band Pass Filter Banks in Cochlear Implant System
|International Journal of Electronics and Communication Engineering|
|© 2019 by SSRG - IJECE Journal|
|Volume 6 Issue 5|
|Year of Publication : 2019|
|Authors : N. Jagan Mohan Reddy|
How to Cite?
N. Jagan Mohan Reddy, "Comparison Study of Hamming and Kaiser Window over Band Pass Filter Banks in Cochlear Implant System," SSRG International Journal of Electronics and Communication Engineering, vol. 6, no. 5, pp. 35-44, 2019. Crossref, https://doi.org/10.14445/23488549/IJECE-V6I5P106
The cochlear implant is the successful neural prosthesis ever developed. This prosthesis is the most effective way to restore hearing purpose. The device is surgically implanted inside the cochlea (brain) to stimulate current pulses similar to neuron stimulation. The audio signal sensed through a microphone is amplified and digitized before the audio/speech signal processing. Continuous Interleaved Sampling (CIS) is one of the most important speech processing strategies used in the speech processors of Cochlear Implant. The speech processing ensures the splitting of the input signal into various frequency bands and provides the filtered signal to appropriate electrodes. The electrodes activate the auditory nerve fibers to provide hearing sensation. The focus of the paper is to design a bank of Band-pass Filters, which is used in the CIS algorithm for separating the frequencies for processing the signal and finally feeding it to different electrodes. Filters are targeted for audio frequencies from 200 to 7.5 kHz. MATLAB based Filter banks using Kaiser Window and Hamming window are considered for design. The center frequencies of the respective band-pass filters are taken into account to test the eight filters. In Xilinx ISE 14.7 Verilog based synthesis for bank of band-pass filters will be implemented.
CIS, FFT, FIR, IIR, LPC, RF.
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