Salaheddine Derouiche and Bachir Djedou, University Badji Mokhtar, Algeria

In this paper, we present the implemented denoising section in the coding strategy of cochlear implants, the technique used is the technique of wavelet bionic BWT (Bionic Wavelet Transform). We have implemented the algorithm for denoising Raise the speech signal by the hybrid method BWT in the FPGA (Field Programmable Gate Array), Xilinx (Virtex5 XC5VLX110T). In our study, we considered the following: at the beginning, we present how to demonstrate features of this technique. We present an algorithm implementation we proposed, we present simulation results and the performance of this technique in terms of improvement of the SNR (Signal to Noise Ratio). The proposed implementations are realized in VHDL (Very high speed integrated circuits Hardware Description Language). Different algorithms for speech processing, including CIS (Continuous Interleaved Sampling) have been implemented the strategy in this processor and tested successfully.

BWT implementation, CIS Strategy, cochlear implant, FPGA, speech processing & FIR digital filter.