Performances Study of a New Speech Coding Strategy with Reduced Channels for Cochlear Implants

Abstract

A new cochlear implant speech coding strategy for representing acoustic information with reduced number of channels will be developed. After a brief description of the actual cochlear implant stimulation methods, the authors present a processing algorithm describing the new adaptive spectral analysis strategy (ASAS-GC). This technique is based on a Gammachirp perception model and an optimal stimulation rate selection. The excited electrodes signals and recognition performances are presented and compared with those of others strategies.