Carrier and envelope triggered cochlear stimulation
First Claim
1. A method of generating electrode stimulation signals for an implanted electrode array, the method comprising:
- processing an acoustic audio signal to generate a plurality of band pass signals, wherein each band pass signal includes a fine structure carrier signal and a modulator envelope signal;
for each band pass signal;
i. extracting fine time structure information from the carrier signal to determine a sequence of stimulation event signals,ii. for one or more low frequency band pass signals, sampling the modulator envelope signal synchronously with the carrier signal to create envelope weighted stimulation event signals,iii. for one or more higher frequency band pass signals,(1) if and only if the modulator envelope signal exceeds a sampling threshold value, then(2) sampling the modulator envelope signal synchronously with the carrier signal to create envelope weighted stimulation event signals,processing the envelope weighted stimulation event signals to produce electrode stimulation signals for the implanted electrode array.
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Accused Products
Abstract
Generation of electrode stimulation signals for an implanted electrode array is described. An acoustic audio signal is processed to generate band pass signals which include a fine structure carrier signal and a modulator envelope signal. For each band pass signal, fine time structure information is extracted from the carrier signal to determine a sequence of stimulation event signals. For one or more low frequency band pass signals, the modulator envelope signal is sampled synchronously with the carrier signal to create envelope weighted stimulation event signals. For one or more higher frequency band pass signals, if and only if the modulator envelope signal exceeds a sampling threshold value, then the modulator envelope signal is sampled synchronously with the carrier signal to create envelope weighted stimulation event signals. The envelope weighted stimulation event signals are then processed to produce electrode stimulation signals for the implanted electrode array.
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Citations
25 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 to generate a plurality of band pass signals, wherein each band pass signal includes a fine structure carrier signal and a modulator envelope signal; for each band pass signal; i. extracting fine time structure information from the carrier signal to determine a sequence of stimulation event signals, ii. for one or more low frequency band pass signals, sampling the modulator envelope signal synchronously with the carrier signal to create envelope weighted stimulation event signals, iii. for one or more higher frequency band pass signals, (1) if and only if the modulator envelope signal exceeds a sampling threshold value, then (2) sampling the modulator envelope signal synchronously with the carrier signal to create envelope weighted stimulation event signals, processing the envelope weighted stimulation event signals to produce electrode stimulation signals for the implanted electrode array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A computer program product implemented in a non-transitory computer readable storage medium for generating electrode stimulation signals for an implanted electrode array, the product comprising:
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program code for processing an acoustic audio signal to generate a plurality of band pass signals, wherein each band pass signal includes a fine structure carrier signal and a modulator envelope signal; program code for each band pass signal for; i. extracting fine time structure information from the carrier signal to determine a sequence of stimulation event signals, ii. for one or more low frequency band pass signals, sampling the modulator envelope signal synchronously with the carrier signal to create envelope weighted stimulation event signals, iii. for one or more higher frequency band pass signals, (1) if and only if the modulator envelope signal exceeds a sampling threshold value, then (2) sampling the modulator envelope signal synchronously with the carrier signal to create envelope weighted stimulation event signals, program code for processing the envelope weighted stimulation event signals to produce electrode stimulation signals for the implanted electrode array. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification