TY - GEN
T1 - Signal subspace approach for speech enhancement in nonstationary noises
AU - Li, Chiung Wen
AU - Lei, Sheau-Fang
PY - 2007/12/1
Y1 - 2007/12/1
N2 - In this paper, we propose a speech enhancement algorithm that is based on signal subspace approach (SSA) combined with RL noise estimation for nonstationary noises. A signal/noise Karhunen-Loeve transform (SNK) is used to implement signal subspace decomposition for noisy speech signal. RL noise estimation is used for adaptive estimates over time for nonstationary noises. Since the noise covariance matrix for SSA can be recursively updated by RL noise estimation, it results that the proposed algorithm can efficiently suppress the noise while reducing speech distortion. Objective experimental measurements indicated that the proposed algorithm was preferred over other SSA methods when tested with sentences corrupted by nonstationary noises.
AB - In this paper, we propose a speech enhancement algorithm that is based on signal subspace approach (SSA) combined with RL noise estimation for nonstationary noises. A signal/noise Karhunen-Loeve transform (SNK) is used to implement signal subspace decomposition for noisy speech signal. RL noise estimation is used for adaptive estimates over time for nonstationary noises. Since the noise covariance matrix for SSA can be recursively updated by RL noise estimation, it results that the proposed algorithm can efficiently suppress the noise while reducing speech distortion. Objective experimental measurements indicated that the proposed algorithm was preferred over other SSA methods when tested with sentences corrupted by nonstationary noises.
UR - http://www.scopus.com/inward/record.url?scp=46749116867&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=46749116867&partnerID=8YFLogxK
U2 - 10.1109/ISCIT.2007.4392269
DO - 10.1109/ISCIT.2007.4392269
M3 - Conference contribution
AN - SCOPUS:46749116867
SN - 1424409772
SN - 9781424409778
T3 - ISCIT 2007 - 2007 International Symposium on Communications and Information Technologies Proceedings
SP - 1580
EP - 1585
BT - ISCIT 2007 - 2007 International Symposium on Communications and Information Technologies Proceedings
T2 - ISCIT 2007 - 2007 International Symposium on Communications and Information Technologies
Y2 - 16 October 2007 through 19 October 2007
ER -