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Noise-reduction artificial cochlea speech processing system and method

A processing system and cochlear implant technology, applied in the field of cochlear implant speech processing system, can solve the problems of estimation error, easy to produce objectionable musical noise, affecting the listening experience and intelligibility of the implanted person, etc.

Active Publication Date: 2016-11-09
ZHEJIANG NUROTRON BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although this noise reduction method is simple, errors will always occur in the estimation of the noise power spectrum, and it is easy to produce objectionable "music noise", which affects the implanter's listening experience and intelligibility

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  • Noise-reduction artificial cochlea speech processing system and method
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  • Noise-reduction artificial cochlea speech processing system and method

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Embodiment Construction

[0080] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0081] see figure 1 , is shown as a flow chart of a cochlear implant speech processing strategy with noise reduction in an embodiment of the present invention, which includes: a signal input unit 101, a fast Fourier transform unit 102, a frequency division processing unit 103, an envelope detection unit 104, and Including a sequentially connected noise reduction processing unit 105, a channel selection unit 108, a nonlinear compression unit 109, and a pulse modulation unit 110, wherein,

[0082] The signal input unit 101 is used to pick up external sounds, and the picked up signal is a noisy signal;

[0083] A fast Fourier transform unit 102, configured to convert the noisy signal picked up by the signal input unit from the time domain to the frequency domain;

[0084] The frequency division processing unit 103 is used for performing freq...

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Abstract

The invention discloses a noise-reduction artificial cochlea speech processing system and method. The method includes the following steps: picking ambient voice signals, the picked voice signals being noise-carrying signals; conducting time domain to frequency domain conversion on the noise-carrying signals; based on frequency, conducting frequency division processing on the noise-carrying signals, dividing the noise-carrying signals to different frequency channels; conducting calculation and extraction on the envelopes of the noise-carrying signals of each channel; estimating noise power of the noise-carrying signals of each channel; based on the estimated noise power spectrum, using the binary masking method to eliminate the noise of the noise-carrying signals of each channel. According to the invention, the method is intended for estimating the noise power spectrum of the noise-carrying signals of each channel, eliminates the noise signals of each channel by using the binary masking method, so that speech identification rate and voice listening effects can be increased for a user of the artificial cochlea in the noisy environment.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a cochlear implant speech processing system and method with noise reduction. Background technique [0002] A cochlear implant can help people with severe or profound deafness regain some hearing. In a quiet environment, most implanters can achieve a high level of speech comprehension and communication skills. However, in a noisy environment, the speech recognition rate of cochlear implant recipients will drop sharply as the signal-to-noise ratio (SNR) of the speech signal decreases. At the same time, strong noise can seriously damage the listening experience of cochlear implant recipients. [0003] The speech recognition rates of cochlear implant recipients in a quiet environment are short sentences, finals, initials, and monosyllabic words from high to low; while the average speech recognition rates in different noise environments are finals, Initial consonants, monosyllabic wo...

Claims

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Application Information

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IPC IPC(8): G10L21/0224G10L21/0232G10L25/21G10L25/60
CPCG10L21/0224G10L21/0232G10L25/21G10L25/60Y02D30/70
Inventor 王宁远孙晓安平利川黄穗
Owner ZHEJIANG NUROTRON BIOTECH
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