A novel VOCODER for cochlear implants.
A new VOCODER-based speech processing strategy for cochlear implants is presented. The proposed method improves upon existing VOCODER techniques in time-frequency resolution and can offer higher noise immunity. The presented method is based on the effective tracking of nonstationary sinusoid components using a non-linear sinusoid tracking algorithm (STA). The structure of the proposed technique, as well as the underlying STA are presented. It is expected that the improvement in time-frequency resolution will offer superior performance in cochlear implants, as well as improvements in speech coding applications. An eight-band version of the proposed technique is presented and superior performance to existing techniques is shown.
Johnson
P A
PA
Department of Electrical and Computer Engineering, Clarkson University, Potsdam, NY 13699, USA. johnsopa@clarkson.edu
McNamara
D M
DM
Ziarani
A K
AK
D000465:Algorithms; D001309:Auditory Threshold; D003054:Cochlear Implants; D003143:Communication Devices for People with Disabilities; D006801:Humans; D015233:Models, Statistical; D010700:Phonetics; D012815:Signal Processing, Computer-Assisted; D012984:Software; D013016:Sound; D013018:Sound Spectrography; D013061:Speech Acoustics; D013067:Speech Perception / Q000502:physiology*; D013997:Time Factors