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Speech & natural language publications January 1, 2012 Conference Paper

Speaker recognition with region-constrained MLLR transforms

SRI International January 1, 2012

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A. Stolcke, A. Mandal and E. Shriberg. “Speaker recognition with region-constrained MLLR transforms,” in Proc. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2012), pp. 4397–4400.

Abstract

It has been shown that standard cepstral speaker recognition models can be enhanced by em region-constrained models, where features are extracted only from certain speech regions defined by linguistic or prosodic criteria. Such region-constrained models can capture features that are more stable, highly idiosyncratic, or simply complementary to the baseline system. In this paper we ask if another major class of speaker recognition models, those based on MLLR speaker adaptation transforms, can also benefit from region-constrained feature extraction. In our approach, we define regions based on phonetic and prosodic criteria, based on automatic speech recognition output, and perform MLLR estimation using only frames selected by these criteria. The resulting transform features are appended to those of a state-of-the-art MLLR speaker recognition system and jointly modeled by SVMs. […]

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