5th International Conference on Spoken Language Processing

Sydney, Australia
November 30 - December 4, 1998

Multi-Channel Pulsation Strategy For Electric Stimulation Of Cochlea

Shigeyoshi Kitazawa, Hiroyuki Kirihata, Tatsuya Kitamura

Department of Computer Science, Faculty of Information, Shizuoka University, Japan

This paper describes a speech coding strategy for a cochlear implant system assuming a Nucleus Cochlear Implant receiver stimulator. Speech processor converts input speech into a series of stimulation electrode position and stimulation current intensities. This process can be optimized with a decomposing process of an acoustic signal into a given set of impulse responses corresponding to a set of electrode channels. An error minimization algorithm can find a optimal stimulation sequence that minimizes distortion of transferred speech and maximize transferred phonological information as well as sound qualities. Re-synthesized sound quality was qualitatively evaluated. Environmental sound can also be recognizable with this method.

Full Paper

Bibliographic reference.  Kitazawa, Shigeyoshi / Kirihata, Hiroyuki / Kitamura, Tatsuya (1998): "Multi-channel pulsation strategy for electric stimulation of cochlea", In ICSLP-1998, paper 1036.