Wavelet transform based strategy for cochlear implant in real time implementation

A real time implementation of the wavelet transform (WT) approach on DSP platforms for a cochlear implant (CI) stimulation strategy is presented in this paper. The cochlear implant converts sounds which are received from the outside, into electrical pulses that stimulate nerve endings in the cochlea. These electrical stimuli are interpreted by the brain as sounds. For real-time experiment, it is crucial that the speech signal be processed with minimal delay from input to output. Thanks to different optimization steps, we have been able to reduce the processing time to approximately 10.5 μs on a 720MHz TMS320C6416 DSP board. This experiment provides directive guidelines for our work to treat the speech signal sample per sample at real time operation.