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Lasso environment model combination for robust speech recognition

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Lasso environment model combination for robust speech recognition
นักวิจัย : Xiao, Xiong , Li, Jinyu , Chng, Eng Siong , Li, Haizhou
คำค้น : DRNTU::Engineering::Computer science and engineering
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Xiao, X., Li, J., Chng, E. S., & Li, H. (2012). Lasso environment model combination for robust speech recognition. 2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 4305-4308. , http://hdl.handle.net/10220/13389 , http://dx.doi.org/10.1109/ICASSP.2012.6288871
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : -
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

In this paper, we propose a novel acoustic model adaptation method for noise robust speech recognition. Model combination is a common way to adapt acoustic models to a target test environment. For example, the mean supervectors of the adapted model are obtained as a linear combination of mean supervectors of many pre-trained environment-dependent acoustic models. Usually, the combination weights are estimated using a maximum likelihood (ML) criterion and the weights are nonzero for all the mean supervectors. We propose to estimate the weights by using Lasso (least absolute shrinkage and selection operator) which imposes an L1 regularization term in the weight estimation problem to shrink some weights to exactly zero. Our study shows that Lasso usually shrinks to zero the weights of those mean supervectors not relevant to the test environment. By removing some nonrelevant supervectors, the obtained mean supervectors are found to be more robust against noise distortions. Experimental results on Aurora-2 task show that the Lasso-based mean combination consistently outperforms ML-based combination.

บรรณานุกรม :
Xiao, Xiong , Li, Jinyu , Chng, Eng Siong , Li, Haizhou . (2555). Lasso environment model combination for robust speech recognition.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Xiao, Xiong , Li, Jinyu , Chng, Eng Siong , Li, Haizhou . 2555. "Lasso environment model combination for robust speech recognition".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Xiao, Xiong , Li, Jinyu , Chng, Eng Siong , Li, Haizhou . "Lasso environment model combination for robust speech recognition."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Xiao, Xiong , Li, Jinyu , Chng, Eng Siong , Li, Haizhou . Lasso environment model combination for robust speech recognition. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.