NDLI: High-performance hmm adaptation with joint compensation of additive and convolutive distortions via Vector Taylor Series

Content Provider	IEEE Xplore Digital Library
Author	Jinyu Li Li Deng Dong Yu Yifan Gong Acero, A.
Copyright Year	2007
Description	Author affiliation: Microsoft Corp., Redmond (Jinyu Li; Li Deng; Dong Yu; Yifan Gong; Acero, A.)
Abstract	In this paper, we present our recent development of a model-domain environment-robust adaptation algorithm, which demonstrates high performance in the standard Aurora 2 speech recognition task. The algorithm consists of two main steps. First, the noise and channel parameters are estimated using a nonlinear environment distortion model in the cepstral domain, the speech recognizer's "feedback" information, and the vector-Taylor-series (VTS) linearization technique collectively. Second, the estimated noise and channel parameters are used to adapt the static and dynamic portions of the HMM means and variances. This two-step algorithm enables joint compensation of both additive and convolutive distortions (JAC). In the experimental evaluation using the standard Aurora 2 task, the proposed JAC/VTS algorithm achieves 91.11% accuracy using the clean-trained simple HMM backend as the baseline system for the model adaptation. This represents high recognition performance on this task without discriminative training of the HMM system. Detailed analysis on the experimental results shows that adaptation of the dynamic portion of the HMM mean and variance parameters is critical to the success of our algorithm.
Starting Page	65
Ending Page	70
File Size	149723
Page Count	6
File Format	PDF
ISBN	9781424417452
DOI	10.1109/ASRU.2007.4430085
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-12-09
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Taylor series Hidden Markov models Nonlinear distortion Adaptation model Speech recognition Working environment noise Standards development Parameter estimation Cepstral analysis Speech enhancement robust ASR vector Taylor series joint compensation additive and convolutive distortions
Content Type	Text
Resource Type	Article

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