| Abstract |
Article Information:
Parameter Compensation for Mel-LP based Noisy Speech Recognition
Md. Mahfuzur Rahman, Md. Robiul Hoque and M. Babul Islam
Corresponding Author: M. Babul Islam
Key words: Aurora-2 database, BEQ, bilinear transformation, CMN, Mel-LPC, , Vol. 4 , (1): 7-12 |
| Submitted |
Accepted |
Published |
| 2011 July, 13 |
2011 August, 30 |
2012 March, 10 |
This study deals with a noise robust distributed speech recognizer for real-world applications by
deploying feature parameter compensation technique. To realize this objective, Mel-LP based speech analysis
has been used in speech coding on the linear frequency scale by applying a first-order all-pass filter instead of
a unit delay. To minimize the mismatch between training and test phases, Cepstral Mean Normalization (CMN)
and Blind Equalization (BEQ) have been applied to enhance Mel-LP cepstral coefficients as an effort to reduce
the effect of additive noise and channel distortion. The performance of the proposed system has been evaluated
on Aurora-2 database which is a subset of TIDigits database contaminated by additive noises and channel
effects. The baseline performance, that is, for Mel-LPC the average word accuracy for test set A has found to
be 59.05%. By applying the CMN and BEQ with the Mel-LP cepstral coefficients, the performance has been
improved to 68.02 and 65.65%, respectively. |
Cite this Reference:
Md. Mahfuzur Rahman, Md. Robiul Hoque and M. Babul Islam, 2012. Parameter Compensation for Mel-LP based Noisy Speech Recognition.
Research Journal of Information Technology , 4(1): 7-12. |
|
|
|
 |
ISSN (Online): 2041-3114
ISSN (Print): 2041-3106 |
 |
|