Signal processing method for cochlear implant
AssigneeiMEDI PLUS Inc.
InventorKUN-HSI TSAI
Life of this patent
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Abstract
A signal processing method for cochlear implant is performed by a speech processor and comprises a noise reduction stage and a signal compression stage. The noise reduction stage can efficiently reduce noise in a electrical speech signal of a normal speech. The signal compression stage can perform good signal compression to enhance signals to stimulate cochlear nerves of a patient with hearing loss. The patient who uses a cochlear implant performing the signal processing method of the present disclosure can accurately hear normal speech.
Claims11
A signal processing method for a cochlear implant, the cochlear implant comprising a microphone and a speech processor, the signal processing method being executed by the speech processor comprising:
- receiving an electrical speech signal from the microphone;
- segmenting the electrical speech signal to a plurality of time-sequenced noisy frames;
- reducing noise in each of the plurality of time-sequenced signal frames to obtain a plurality of clean signal frames, the plurality of clean signal frames comprising a (t-1)-th clean frame xt-1 and a t-th clean frame xt;
- obtaining a (t-1)-th compression factor αt-1 according to the (t-1)-th clean frame xt-1;
- obtaining a t-th compression factor αt for the t-th clean frame xt according to the compression factor αt-1 and the t-th clean frame xt;
- obtaining a t-th output frame zt based on the t-th compression factor αt;
- and
- outputting the t-th output frame zt.
Dependencies are inferred from the claim text.