| Paper Abstract and Keywords |
| Presentation |
2004-11-25 13:00
Speech recognition under the noisy environment using the improved rules of enhancement of spectral envelops
Kazuki Yoshida, Masanori Akita, Yoichi Midorikawa (Oita Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
This report aims at modification of the shapes of spectral envelopes of the speech signal polluted with noise. In this case, Boll’s spectral subtraction method is usually used. In our laboratory, the modification of spectral envelopes by rules has been used and effectiveness of the method is shown using speech recognition experiments. However, irregular modification occurs on high frequency domain in case that background noise is colored. In order to improve these errors, six non-linear threshold functions are defined and used in the new modification rules. And the validity of six non-linear threshold functions is evaluated.
It is known that the peak of a spectrum envelope cannot be easily polluted by noise. Therefore, the emphasizing the local peaks of spectral envelopes is effective and the emphasizing methods are well known. The preliminary experiment in our laboratory has also shown that emphasis of the peak of a spectrum was effective for the speech recognition under the noisy environment. However, some errors are occurring when the environment of the background noise is varied. In order to improve these errors, the local peaks on low frequency domain are emphasized. The validity of this method is also shown. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Speech recognition / Colored noise / Spectral subtraction / Enhancement / Cepstrum / / / |
| Reference Info. |
IEICE Tech. Rep., vol. 104, no. 454, EA2004-90, pp. 1-6, Nov. 2004. |
| Paper # |
EA2004-90 |
| Date of Issue |
2004-11-18 (EA) |
| ISSN |
Print edition: ISSN 0913-5685 |
| Download PDF |
|
| Conference Information |
| Committee |
EA |
| Conference Date |
2004-11-25 - 2004-11-26 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Ohita Univ. |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
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| Paper Information |
| Registration To |
EA |
| Conference Code |
2004-11-EA |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Speech recognition under the noisy environment using the improved rules of enhancement of spectral envelops |
| Sub Title (in English) |
|
| Keyword(1) |
Speech recognition |
| Keyword(2) |
Colored noise |
| Keyword(3) |
Spectral subtraction |
| Keyword(4) |
Enhancement |
| Keyword(5) |
Cepstrum |
| Keyword(6) |
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| Keyword(7) |
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| Keyword(8) |
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| 1st Author's Name |
Kazuki Yoshida |
| 1st Author's Affiliation |
Oita University (Oita Univ.) |
| 2nd Author's Name |
Masanori Akita |
| 2nd Author's Affiliation |
Oita University (Oita Univ.) |
| 3rd Author's Name |
Yoichi Midorikawa |
| 3rd Author's Affiliation |
Oita University (Oita Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2004-11-25 13:00:00 |
| Presentation Time |
30 minutes |
| Registration for |
EA |
| Paper # |
EA2004-90 |
| Volume (vol) |
vol.104 |
| Number (no) |
no.454 |
| Page |
pp.1-6 |
| #Pages |
6 |
| Date of Issue |
2004-11-18 (EA) |
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