Comparison of Lattice-Free and Lattice-Based Sequence Discriminative Training Criteria for LVCSR

1 Jul 2019Wilfried MichelRalf SchlüterHermann Ney

Sequence discriminative training criteria have long been a standard tool in automatic speech recognition for improving the performance of acoustic models over their maximum likelihood / cross entropy trained counterparts. While previously a lattice approximation of the search space has been necessary to reduce computational complexity, recently proposed methods use other approximations to dispense of the need for the computationally expensive step of separate lattice creation... (read more)

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