First European Conference on Speech Communication and Technology

Paris, France
September 27-29, 1989

Auditory Processing in a Post-Cochlear Neural Network Vowel Spectrum Processing Based on Spike Synchrony

F. Berthommier (1), Jean-Luc Schwartz (2), Pierre Escudier (2)

(1) IMAG - TM3 - TIME, Faculte de Medecine de Grenoble, La Tranche, France
(2) ICP - UA CNRS, INPG/ENSERG, Université Stendhal, Grenoble, France

The present work is concerned with the processing of spectral information by stochastic coding, at the output of the cochlea. We study the collective behaviour of a large number of cells based on a measure of the correlation of sequences of spikes between neighbour units. Our first results show that we can obtain significant discrimination of spectral components of vowels without any kind of cabled lateral inhibition or second filter device. This collective behaviour is made possible by the synchronization of inputs of adjacent units. This could provide an interesting and rather new way of making profit of both geographical coding (tonotopy) and temporal coding (synchronization) particularly useful for formant detection.

Full Paper

Bibliographic reference.  Berthommier, F. / Schwartz, Jean-Luc / Escudier, Pierre (1989): "Auditory processing in a post-cochlear neural network vowel spectrum processing based on spike synchrony", In EUROSPEECH-1989, 1247-1250.