TY - GEN
T1 - A two-channel minimum mean-square error log-spectral amplitude estimator for speech enhancement
AU - Choi, Min Seok
AU - Kang, Hong Goo
PY - 2008
Y1 - 2008
N2 - This paper proposes a novel two-channel speech enhancement structure using the minimum mean-square error log-spectral amplitude (MMSE-LSA) estimator. The proposed two-channel enhancement algorithm utilizes a spatial relationship between two input signals to accurately estimate the noise power spectral density (PSD) needed for the MMSE-LSA algorithm. The proposed structure improves the noise reduction capacity with less speech distortion, while its complexity is much lower than simple cascade structures. The performance of the proposed algorithm is evaluated by automatic speech recognition tests in a car environment. Comparing to a simple cascading of two- and single-channel algorithms, the proposed algorithm improves the relative recognition rate by 17.5 % for high speed conditions and 14.8 % for low speed conditions, respectively.
AB - This paper proposes a novel two-channel speech enhancement structure using the minimum mean-square error log-spectral amplitude (MMSE-LSA) estimator. The proposed two-channel enhancement algorithm utilizes a spatial relationship between two input signals to accurately estimate the noise power spectral density (PSD) needed for the MMSE-LSA algorithm. The proposed structure improves the noise reduction capacity with less speech distortion, while its complexity is much lower than simple cascade structures. The performance of the proposed algorithm is evaluated by automatic speech recognition tests in a car environment. Comparing to a simple cascading of two- and single-channel algorithms, the proposed algorithm improves the relative recognition rate by 17.5 % for high speed conditions and 14.8 % for low speed conditions, respectively.
UR - http://www.scopus.com/inward/record.url?scp=50449084489&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=50449084489&partnerID=8YFLogxK
U2 - 10.1109/HSCMA.2008.4538709
DO - 10.1109/HSCMA.2008.4538709
M3 - Conference contribution
AN - SCOPUS:50449084489
SN - 9781424423385
T3 - 2008 Hands-free Speech Communication and Microphone Arrays, Proceedings, HSCMA 2008
SP - 152
EP - 155
BT - 2008 Hands-free Speech Communication and Microphone Arrays, Proceedings, HSCMA 2008
T2 - 2008 Hands-free Speech Communication and Microphone Arrays, HSCMA 2008
Y2 - 6 May 2008 through 8 May 2008
ER -