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Journal of Scientific and Industrial Research (JSIR) >
JSIR Vol.70 [2011] >
JSIR Vol.70(05) [May 2011] >
| Title: | Enhancement of noisy speech signal based on variance and modified gain function with PDE preprocessing technique for digital hearing aid |
| Authors: | Deepa, D
Shanmugam, A |
| Keywords: | MSE
PDE
SNR
Adaptive threshold
Gain function
Variance |
| Issue Date: | May-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | This paper deals with
a single-channel speech enhancement algorithm, preprocessed using
partial differential equation, used to overcome degradation of noisy
speech signals in digital hearing aids. Adaptive threshold is estimated using
variance in time index. Gain is modified based on adaptive threshold estimated
in frequency bins and used to enhance noisy signal. By proposed method,
definite improvement in SNR and reduced MSE can be obtained compared to
conventional method. This method
provides a greater degree of flexibility and control on noise subtraction
levels that reduce artifacts in enhanced speech, resulting in improved speech
quality and intelligibility. |
| Page(s): | 332-337 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1084 (Online); 0022-4456 (Print) |
| Source: | JSIR Vol.70(05) [May 2011]
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