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Voice processing method used for electrical cochlea

A speech processing and cochlear implant technology, applied in speech analysis, ear therapy, medical science, etc., can solve the problems of poor speech recognition effect and rough information acquisition, and achieve the effect of good adaptability and superior performance

Inactive Publication Date: 2013-11-20
刘洪运
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Problems solved by technology

However, some existing speech coding strategies can only transmit the amplitude information of speech (SPEAK, CIS, etc.); some coding strategies encode amplitude and frequency information at the same time, but the processed information is too rough so that the auditory nerve cannot selectively obtain useful information (such as CA ) leads to poor speech recognition effect; FAME, WTZS and other coding strategies can transmit the amplitude and frequency of the original speech to the auditory nerve at the same time, and it has been verified by experiments that it can indeed improve the speech recognition ability, but its principle design flaws and adaptability are not enough. get well resolved

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  • Voice processing method used for electrical cochlea
  • Voice processing method used for electrical cochlea
  • Voice processing method used for electrical cochlea

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Embodiment Construction

[0026] Below, the present invention will be described in detail in conjunction with the accompanying drawings.

[0027] A Hilbert Transform (Hilbert Transform, HT)

[0028] For any real signal x(t)=A(t)cosφt, its analytical form s(t) can be expressed as:

[0029] s ( t ) = x ( t ) + j x ^ ( t ) - - - ( 1 )

[0030] in and x(t) form a Hilbert transformation pair, then s(t) can be expressed as:

[0031] s(t)=A(t)e jφt (2)

[0032] in In this way, the Hilbert transform provides a unique function that defines the instantaneous amplitude and phase. The instantaneous frequency f(t) of the original signal x(t) is:

[0033] f ( ...

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Abstract

The invention discloses a voice processing method used for an electrical cochlea. The voice processing method used for the electrical cochlea comprises the steps of pre-processing, namely carrying out pre-processing on a voice signal input through a microphone; Hilbert-Huang transformation, namely carrying out Hilbert-Huang transformation on the pre-processed voice signal to obtain Hilbert-Huang transformation signals of multiple channels; modulation, namely processing the Hilbert-Huang transformation signal of each channel to obtain an amplitude signal and a frequency signal which correspond to the Hilbert-Huang transformation signal of the channel, modulating a biphase pulse by means of the frequency signal corresponding to the Hilbert-Huang transformation signal of each channel to obtain a biphase pulse modulation frequency signal corresponding to the Hilbert-Huang transformation signal of the channel, and modulating the biphase pulse modulation frequency signal corresponding to the Hilbert-Huang transformation signal of each channel by means of the amplitude signal corresponding to the Hilbert-Huang transformation signal of the channel to obtain a channel modulation signal used for driving an electrode corresponding to the channel.

Description

technical field [0001] The invention relates to an electronic cochlear, in particular to a voice processing method for the electronic cochlear. Background technique [0002] A cochlear implant is a medical device that uses functional electrical stimulation to restore partial hearing in patients with severe or complete deafness. It is currently the only effective way to treat sensorineural deafness. So far, at least 100,000 people around the world have had cochlear implants. The development of science and technology, especially the progress in the field of microelectronics, has made the cochlear implant experience the development from unipolar to multipolar, from analog to digital, from simple feature extraction to complex time-domain detail processing. With the continuous innovation of signal processing technology and the maturity of speech coding strategy research, the cochlear implant system can not only provide a high degree of speech recognition rate, but also enable im...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/18A61F11/04G10L19/00
Inventor 刘洪运王卫东
Owner 刘洪运
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