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- W44486516 abstract "Abstract : We extend the input transformation approach for adapting hybrid connectionist speech recognizers to allow multiple transformations to be trained. Previous work has shown the efficacy of the linear input transformation approach for speaker adaptation [1][2][3], but has focused only on training global transformations. This approach is clearly suboptimal since it assumes that a single transformation is appropriate for every region in the acoustic feature input space, that is, for every phonetic class, microphone, and noise level. In this paper, we propose a new algorithm to train mixtures of transformation networks (MTNs) in the hybrid connectionist recognition framework. This approach is based on the idea of partitioning the acoustic feature space into R regions and training an input transformation for each region. The transformations are combined probabilistically according to the degree to which the acoustic features belong to each region, where the combination weights are derived from a separate acoustic gating network (AGN). We apply the new algorithm to nonnative speaker adaptation, and present recognition results for the 1994 WSJ Spoke 3 development set. The MTN technique can also be used for noise or microphone robust recognition or for other nonspeech neural network pattern recognition problems." @default.
- W44486516 created "2016-06-24" @default.
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- W44486516 date "1997-09-25" @default.
- W44486516 modified "2023-09-23" @default.
- W44486516 title "Mixture Input Transformations for Adaptation of Hybrid Connectionist Speech Recognizes" @default.
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