Cochlear implant stimulation with low frequency channel privilege
First Claim
1. A method of activating stimulation electrodes in a cochlear implant electrode, the method comprising:
- processing an input acoustic audio signal to generate a plurality of band pass signals each representing an associated band of audio frequencies;
extracting stimulation signal information from the band pass signals based on assigning the band pass signals to a plurality of electrode stimulation groups each containing one or more stimulation electrodes, and generating a set of stimulation event signals for each electrode stimulation group that define electrode stimulation timings and amplitudes; and
selecting a set of electrode stimulation signals from the stimulation event signals based on a pulse weighting function that uses channel-specific weighting factors favoring lower frequencies for activating the stimulation electrodes to stimulate neighboring audio nerve tissue.
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Abstract
A system and method for activating stimulation electrodes in cochlear implant electrode is described. A preprocessor filter bank is configured to process an input acoustic audio signal to generate band pass signals that each represent an associated band of audio frequencies. An information extractor is configured to extract stimulation signal information from the band pass signals based on assigning the band pass signals to corresponding electrode stimulation groups that each contain one or more stimulation electrodes, and generates a set of stimulation event signals for each electrode stimulation group that define electrode stimulation timings and amplitudes. A pulse selector is configured to select a set of electrode stimulation signals from the stimulation event signals based on a pulse weighting function that uses channel-specific weighting factors favoring lower frequencies for activating the stimulation electrodes to stimulate neighboring audio nerve tissue.
24 Citations
18 Claims
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1. A method of activating stimulation electrodes in a cochlear implant electrode, the method comprising:
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processing an input acoustic audio signal to generate a plurality of band pass signals each representing an associated band of audio frequencies; extracting stimulation signal information from the band pass signals based on assigning the band pass signals to a plurality of electrode stimulation groups each containing one or more stimulation electrodes, and generating a set of stimulation event signals for each electrode stimulation group that define electrode stimulation timings and amplitudes; and selecting a set of electrode stimulation signals from the stimulation event signals based on a pulse weighting function that uses channel-specific weighting factors favoring lower frequencies for activating the stimulation electrodes to stimulate neighboring audio nerve tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 18)
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10. An implantable stimulation arrangement for generating electrode stimulation signals for stimulation electrodes in a cochlear implant, the arrangement comprising:
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a preprocessor filter bank configured to process an input acoustic audio signal to generate a plurality of band pass signals each representing an associated band of audio frequencies; an information extractor configured to extract stimulation signal information from the band pass signals based on assigning the band pass signals to a plurality of electrode stimulation groups each containing one or more stimulation electrodes, and generating a set of stimulation event signals for each electrode stimulation group that define electrode stimulation timings and amplitudes; and a pulse selector configured to select a set of electrode stimulation signals from the stimulation event signals based on a pulse weighting function that uses channel-specific weighting factors favoring lower frequencies for activating the stimulation electrodes to stimulate neighboring audio nerve tissue. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification