Cochlear implant signal processing method and system for enhancing time-domain expression

A signal processing and cochlear implant technology, applied in the field of medical devices, can solve the problem of mutual interference between envelope and TFS, and achieve the effect of avoiding residual charge, high hearing sensitivity, and avoiding excessive interference

Active Publication Date: 2018-06-05
SHENZHEN UNIV
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Problems solved by technology

[0005] However, TLE leaves a problem, which is the mutual interference between the envelope and TFS

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  • Cochlear implant signal processing method and system for enhancing time-domain expression
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  • Cochlear implant signal processing method and system for enhancing time-domain expression

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[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] A cochlear implant signal processing method for enhancing time-domain expression, specifically comprising: a preprocessing step: performing pre-emphasis and noise reduction processing on sound signals collected by a microphone; Filter the sound signal received; time-domain signal expression conversion step: perform time-domain signal expression conversion processing on the band-pass signal output by each band-pass filter, so that the time domain of the envelope can be retained while introducing time-domain fine structure information Periodic information; band-pass signal transmission step: p...

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Abstract

A signal processing method for enhancing temporal presentation in a cochlear implant. The method comprises: a filtering step, in which a band-pass filter bank filters an acquired audio signal; a step of transforming temporal presentation of a signal, in which, if a frequency range of a current electrode channel is higher than the upper limit f1 of temporal pitch of the electrode channel, and a bandwidth is less than or equal to a difference between the upper limit f1 of temporal pitch and an upper limit f2 of a frequency range of temporal periodicity of an envelope, then the frequency of the band-pass filtered signal passing through the current electrode channel is shifted downward to between the upper limit f2 of the frequency range of temporal periodicity of the envelope and the upper limit f1 of temporal pitch of the electrode channel; and a band-pass filtered signal transferring step, in which the band-pass filtered signal having undergone the transformation of temporal presentation is further processed, and then outputted as an electrical current waveform. The method introduces temporal fine structure information without interfering with an envelope, thus providing cochlear implants with improved auditory perception performance.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a cochlear artificial signal processing method and system for enhancing time-domain expression. Background technique [0002] Cochlear Implant (CI) is an electronic device that can help people with severe or severe hearing loss to restore partial hearing. Most CI implanters can already have good one-on-one verbal communication (without visual information) in a quiet environment, and can even make a phone call. But this is based on the speaker's clear, standard and moderate speech speed. Fast speech, coherent pronunciation, and occasional slurred words may not be a problem for normal hearing people, but they will cause great difficulties for implanters. In addition, the anti-noise interference, music perception, and pitch resolution effects of CI implanters are still poor. [0003] Most of the current CI signal processing strategies are designed based on the time-domain envelope,...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F11/04A61F2/18
CPCA61F2/18A61F11/04
Inventor 孟庆林郑能恒李霞
Owner SHENZHEN UNIV
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