Spectral contrast enhancement in a cochlear implant speech processor
AssigneeAdvanced Bionics AG
InventorsAbhijit Kulkarni, Leonid M. Litvak, Aniket Saoji
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Abstract
Among other things, enhancing spectral contrast for a cochlear implant listener includes detecting a time domain signal. A first transformation is applied to the detected time domain signal to convert the time domain signal to a frequency domain signal. A second transformation is applied to the frequency domain signal to express the frequency domain signal as a sum of two or more components. A sensitivity of the cochlear implant listener to detect modulation of each component is obtained.
Claims17
A method for enhancing the operation of a cochlear implant system, comprising:
- receiving a time domain signal at sound processing circuitry of a user;
- applying in the sound processing circuitry a first transformation to the time domain signal to form a first frequency domain signal;
- applying in the sound processing circuitry a second transformation to the frequency domain signal to form a modulation spectrum comprised of a plurality of modulation components;
- modifying the modulation spectrum at the sound processing circuitry;
- and
- taking an inverse transform of the modified modulation spectrum at the sound processing circuitry to arrive at a second frequency domain signal having increased contrast.
A cochlear implant system comprising:
- a sound processing circuitry adapted to execute program code to:
- receive a time domain signal;
- apply a first transformation to the time domain signal to form a first frequency domain signal;
- apply circuitry a second transformation to the frequency domain signal to form a modulation spectrum comprised of a plurality of modulation components;
- modify the modulation spectrum;
- and
- take an inverse transform of the modified modulation spectrum to arrive at a second frequency domain signal having increased contrast.
Dependencies are inferred from the claim text.