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KMID : 1022420090010040119
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Phonetics and Speech Sciences
2009 Volume.1 No. 4 p.119 ~ p.125
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Fast Speaker Adaptation Based on Eigenspace-based MLLR Using Artificially Distorted Speech in Car Noise Environment
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Song Hwa-Jeon
Jeon Hyung-Bae
Kim Hyung-Soon
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Abstract
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This paper proposes fast speaker adaptation method using artificially distorted speech in telematics terminal under the car noise environment based on eigenspace-based maximum likelihood linear regression (ES-MLLR). The artificially distorted speech is built from adding the various car noise signals collected from a driving car to the speech signal collected from an idling car. Then, in every environment, the transformation matrix is estimated by ES-MLLR using the artificially distorted speech corresponding to the specific noise environment. In test mode, an online model is built by weighted sum of the environment transformation matrices depending on the driving condition. In 3k-word recognition task in the telematics terminal, we achieve a performance superior to ES-MLLR even using the adaptation data collected from the driving condition.
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KEYWORD
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speaker adaptation, eigenspace-based MLLR, environment selection
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