TY - GEN
T1 - Reference eigen-environment and speaker weighting for robust speech recognition
AU - Liao, Yuan Fu
AU - Fang, Hung Hsiang
AU - Yang, Chih Min
PY - 2008
Y1 - 2008
N2 - In this paper a reference eigen-environment and speaker weighting (RESW) method is proposed for online HMM adaptation. RESW establishes multiple eigen-MLLR subspaces as the set of a priori knowledge according to certain affecting factors, such as noise type, SNR, male and female. It then projects an input test utterance simultaneously into the set of eigen-subspaces and optimally synthesizes out a set of suitable HMMs. The proposed RESW was evaluated on Aurora 2 multi-condition training task. Experimental results showed that average word error rate (WER) of 6.11% was achieved. RESW not only outperformed the multi-condition training baseline (Multi-Con., 13.72%) but also the blind ETSI advanced DSR front-end (ETSI-Adv., 8.65%) and the histogram equalization (HEQ, 8.66%) and the non-blind reference model weighting (RMW, 7.29%) and Eigen-MLLR (6.14%) approaches.
AB - In this paper a reference eigen-environment and speaker weighting (RESW) method is proposed for online HMM adaptation. RESW establishes multiple eigen-MLLR subspaces as the set of a priori knowledge according to certain affecting factors, such as noise type, SNR, male and female. It then projects an input test utterance simultaneously into the set of eigen-subspaces and optimally synthesizes out a set of suitable HMMs. The proposed RESW was evaluated on Aurora 2 multi-condition training task. Experimental results showed that average word error rate (WER) of 6.11% was achieved. RESW not only outperformed the multi-condition training baseline (Multi-Con., 13.72%) but also the blind ETSI advanced DSR front-end (ETSI-Adv., 8.65%) and the histogram equalization (HEQ, 8.66%) and the non-blind reference model weighting (RMW, 7.29%) and Eigen-MLLR (6.14%) approaches.
KW - Eigen-MLLR
KW - Reference model weighting
KW - Robust speech recognition
UR - http://www.scopus.com/inward/record.url?scp=60849136336&partnerID=8YFLogxK
U2 - 10.1109/CHINSL.2008.ECP.31
DO - 10.1109/CHINSL.2008.ECP.31
M3 - Conference contribution
AN - SCOPUS:60849136336
SN - 9781424429431
T3 - Proceedings - 2008 6th International Symposium on Chinese Spoken Language Processing, ISCSLP 2008
SP - 77
EP - 80
BT - Proceedings - 2008 6th International Symposium on Chinese Spoken Language Processing, ISCSLP 2008
T2 - 2008 6th International Symposium on Chinese Spoken Language Processing, ISCSLP 2008
Y2 - 16 December 2008 through 19 December 2008
ER -