Tonotopic Implant Stimulation
First Claim
1. A method of generating electrode stimulation signals for an implanted electrode array, the method comprising:
- processing an acoustic audio signal with a bank of filters, each filter being associated with a band of audio frequencies, to generate a set of band pass signals, each band pass signal corresponding to the band of frequencies associated with one of the filters;
extracting stimulation information from the band pass signals to generate a set of stimulation event signals defining electrode stimulation signals;
weighting the stimulation event signals with a weighted matrix of stimulation amplitudes reflecting patient-specific perceptual characteristics to produce a set of electrode stimulation signals; and
developing the electrode stimulation signals into a set of output electrode pulses to the electrodes in the implanted electrode array.
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Abstract
Electrode stimulation signals are generated for an implanted electrode array. An acoustic audio signal is processed with a bank of filters that are each associated with a band of audio frequencies, and a set of band pass signals is generated with each band pass signal corresponding to the band of frequencies associated with one of the filters. Stimulation information is extracted from the band pass signals to generate a set of stimulation event signals defining electrode stimulation signals. Then the stimulation event signals are weighted with a weighted matrix of stimulation amplitudes reflecting patient-specific perceptual characteristics to produce a set of electrode stimulation signals for electrodes in the implanted electrode array.
35 Citations
32 Claims
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1. A method of generating electrode stimulation signals for an implanted electrode array, the method comprising:
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processing an acoustic audio signal with a bank of filters, each filter being associated with a band of audio frequencies, to generate a set of band pass signals, each band pass signal corresponding to the band of frequencies associated with one of the filters; extracting stimulation information from the band pass signals to generate a set of stimulation event signals defining electrode stimulation signals; weighting the stimulation event signals with a weighted matrix of stimulation amplitudes reflecting patient-specific perceptual characteristics to produce a set of electrode stimulation signals; and developing the electrode stimulation signals into a set of output electrode pulses to the electrodes in the implanted electrode array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A cochlear implant system comprising:
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a preprocessor including a bank of filters, each filter being associated with a band of audio frequencies, for processing an acoustic audio signal to generate a set of band pass signals, each band pass signal corresponding to the band of frequencies associated with one of the filters; a stimulation pulse generator for extracting stimulation information from the band pass signals to generate a set of stimulation event signals defining electrode stimulation signals; a pulse weighting module for weighting the stimulation event signals with a weighted matrix of stimulation amplitudes reflecting patient-specific perceptual characteristics to produce a set of electrode stimulation signals; and a pulse shaper for developing the electrode stimulation signals into a set of output electrode pulses to the electrodes in the implanted electrode array. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification