Brian Hutchinson

Tensor Deep Stacking Networks for Phonetic Classification and Recognition

We introduce a novel deep architecture, the Tensor Deep Stacking Network (T-DSN), in which multiple blocks are stacked on top of another and where a bilinear mapping from hidden representations to the output in each block is used to incorporate higher-order statistics of the input features. Using an efficient and scalable parallel learning algorithm, we train a T-DSN to classify standard three-state monophones in the TIMIT database. The T-DSN outperforms an alternative pretrained Deep Neural Network (DNN) architecture in frame-level classification (both state and phone) and in the cross-entropy measure. For continuous phonetic recognition, T-DSN performs equivalently to a DNN, without the need for a hard-to-scale fine-tuning step.

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