High accuracy tonotopic and periodic coding with enhanced harmonic resolution
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, each of which represents an associated band of audio frequencies;
defining a plurality of macro bands, each of which characterizes a plurality of the band pass signals;
processing the macro bands in a sequence of sampling intervals, wherein for each sampling interval the processing includes;
i. extracting timing and energy information from each band pass signal to form requested stimulation events,ii. decimating the requested stimulation events to select a maximum energy band pass signal within each macro band, andiii. decimating each selected band pass signal based on a pulse selection inhibition function and preserving temporal and spectral structures of the band pass signals so as to generate stimulation event signals; and
weighting the stimulation event signals with a weighting matrix reflecting patient-specific pitch perception characteristics to produce output electrode stimulation signals to the implanted electrode array.
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Accused Products
Abstract
Generating electrode stimulation signals for an implanted electrode array is described. An acoustic audio signal is processed to generate band pass signals which represent associated bands of audio frequencies. Macro bands are defined, each of which characterizes multiple band pass signals. The macro bands are processed in a sequence of sampling intervals. For each sampling interval, the processing includes: i. extracting timing and energy information from each band pass signal to form requested stimulation events, ii. decimating the requested stimulation events to select a maximum energy band pass signal within each macro band, and iii. decimating each selected band pass signal based on a pulse selection inhibition function and preserving temporal and spectral structures of the band pass signals so as to generate stimulation event signals. The stimulation event signals are weighted with a weighting matrix reflecting patient-specific pitch perception characteristics to produce output electrode stimulation signals to the implanted electrode array.
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Citations
18 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, each of which represents an associated band of audio frequencies; defining a plurality of macro bands, each of which characterizes a plurality of the band pass signals; processing the macro bands in a sequence of sampling intervals, wherein for each sampling interval the processing includes; i. extracting timing and energy information from each band pass signal to form requested stimulation events, ii. decimating the requested stimulation events to select a maximum energy band pass signal within each macro band, and iii. decimating each selected band pass signal based on a pulse selection inhibition function and preserving temporal and spectral structures of the band pass signals so as to generate stimulation event signals; and weighting the stimulation event signals with a weighting matrix reflecting patient-specific pitch perception characteristics to produce output electrode stimulation signals to the implanted electrode array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer program product implemented in a 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, each of which represents an associated band of audio frequencies; program code for defining a plurality of macro bands, each of which characterizes a plurality of the band pass signals; program code for processing the macro bands in a sequence of sampling intervals, wherein for each sampling interval the processing includes; i. extracting timing and energy information from each band pass signal to form requested stimulation events, ii. decimating the requested stimulation events to select a maximum energy band pass signal within each macro band, and iii. decimating each selected band pass signal based on a pulse selection inhibition function and preserving temporal and spectral structures of the band pass signals so as to generate stimulation event signals; and program code for weighting the stimulation event signals with a weighting matrix reflecting patient-specific pitch perception characteristics to produce output electrode stimulation signals to the implanted electrode array. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification