TY - GEN
T1 - Noise reduction based on microphone array and post-filtering for robust speech recognition
AU - Li, Junfeng
AU - Akagi, Masato
AU - Suzuki, Yôiti
PY - 2006/1/1
Y1 - 2006/1/1
N2 - This paper proposes a noise reduction system using microphone array and post-filtering to improve the recognition accuracy and robustness of hands-free speech recognition systems in adverse environments. In this research, we suppose that undesired noises are of localized and non-localized noise components. To deal with localized noise, we propose a hybrid noise estimation technique and a robust and accurate speech absence probability estimator to calculate the spectra of localized noise, which is further reduced by spectral subtraction. To deal with non-localized noise, we propose a hybrid post-filter with an assumption of a diffuse noise field. Speech recognition results show that the proposed noise reduction algorithm outperforms the other traditional algorithms in the tested noisy conditions.
AB - This paper proposes a noise reduction system using microphone array and post-filtering to improve the recognition accuracy and robustness of hands-free speech recognition systems in adverse environments. In this research, we suppose that undesired noises are of localized and non-localized noise components. To deal with localized noise, we propose a hybrid noise estimation technique and a robust and accurate speech absence probability estimator to calculate the spectra of localized noise, which is further reduced by spectral subtraction. To deal with non-localized noise, we propose a hybrid post-filter with an assumption of a diffuse noise field. Speech recognition results show that the proposed noise reduction algorithm outperforms the other traditional algorithms in the tested noisy conditions.
KW - Microphone array
KW - Post-filter
KW - Speech recognition
UR - http://www.scopus.com/inward/record.url?scp=34249274933&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34249274933&partnerID=8YFLogxK
U2 - 10.1109/ICOSP.2006.345515
DO - 10.1109/ICOSP.2006.345515
M3 - Conference contribution
AN - SCOPUS:34249274933
SN - 0780397371
SN - 9780780397378
T3 - International Conference on Signal Processing Proceedings, ICSP
BT - 8th International Conference on Signal Processing, ICSP 2006
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 8th International Conference on Signal Processing, ICSP 2006
Y2 - 16 November 2006 through 20 November 2006
ER -