Ragni, A and Gales, MJF Derivative Kernels for Noise Robust ASR. In: IEEE Workshop on Automatic Speech Recognition and Understanding, 11-12-2011 to 15-12-2011. (Unpublished)Full text not available from this repository.
Recently there has been interest in combined gen- erative/discriminative classifiers. In these classifiers features for the discriminative models are derived from generative kernels. One advantage of using generative kernels is that systematic approaches exist how to introduce complex dependencies beyond conditional independence assumptions. Furthermore, by using generative kernels model-based compensation/adaptation tech- niques can be applied to make discriminative models robust to noise/speaker conditions. This paper extends previous work with combined generative/discriminative classifiers in several directions. First, it introduces derivative kernels based on context- dependent generative models. Second, it describes how derivative kernels can be incorporated in continuous discriminative models. Third, it addresses the issues associated with large number of classes and parameters when context-dependent models and high- dimensional features of derivative kernels are used. The approach is evaluated on two noise-corrupted tasks: small vocabulary AURORA 2 and medium-to-large vocabulary AURORA 4 task.
|Item Type:||Conference or Workshop Item (UNSPECIFIED)|
|Divisions:||Div F > Machine Intelligence|
|Depositing User:||Cron Job|
|Date Deposited:||11 Feb 2012 10:14|
|Last Modified:||22 Oct 2012 02:14|
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