A method of speech conversion in a cochlear implant

Details A method of speech conversion in a cochlear implant A method of speech conversion in a cochlear implant

A - Human Necessities

61

F

A61F 11/00 (2006.01)

Patent

CA 2533935

It is an object of the present invention to provide a cochlear implant and a method speech conversion in the cochlear implant which can provide a user a speech of almost natural feeling and can regenerate a natural variation at a value near the natural period of respective channels according to the present invention there is provided a method of speech conversion in a cochlear implant in which an electrode array of a plurality of electrodes is arranged within a cochlea, electrically stimulating pulses are generated by transmitting speech information sampled via a microphone to the electrodes, and the acoustic sense is reinforced by transmitting the speech information to the cochlea as electrically stimulating pulses characterized in that the method comprises steps of: discriminating the speech information into respective frequency bands using a plurality of band pass filters within a signal frame being a predetermined sampling period, adding an information of a channel corresponding to the frequency band to the speech information, adjusting the number of the stimulating pulses to a frequency allowed in one channel by leaving in respective channels a speech information having a higher signal level in one channel, adjusting the number of the stimulating pulses to a frequency allowed in all channels by leaving a speech information having a higher signal level in all speech information left in respective channels and generating the stimulating pulses by providing the left speech information to the electrode corresponding to the channel.

L'invention concerne un procédé de conversion vocale dans une oreille interne artificielle permettant de fournir une voix proche de la voix naturelle d'une personne au moyen d'une oreille interne artificielle et à reproduire la fluctuation naturelle de façon aléatoire avec une valeur proche de la périodicité unique à chaque canal. Dans une trame de signaux, les informations vocales se distinguent en fonction de chaque bande de fréquence par utilisation de filtres passe-bande. Les informations de canaux sur chaque bande de fréquence correspondantes sont ajoutées aux informations vocales. Pour chaque canal, les informations vocales possédant un niveau de signal élevé à l'intérieur d'un canal sont laissées de manière que le nombre d'impulsions sensorielles soient réglées en vue d'atteindre une certaine fréquence autorisée par un canal. Pour toutes les informations vocales laissées pour chaque canal, les informations vocales possédant un niveau du signal élevé sont laissées de manière que le nombre d'impulsions sensorielles soient réglées à une certaine fréquence autorisée pour tout le canal. Les informations vocales restantes sont transmises à une électrode correspondant au canal, générant ainsi une impulsion sensorielle.

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