Removing Redundancy From Lattices

David Nolden,Hagen Soltau,Daniel Povey,Pegah Ghahremani,Lidia Mangu,Hermann Ney

15TH ANNUAL CONFERENCE OF THE INTERNATIONAL SPEECH COMMUNICATION ASSOCIATION (INTERSPEECH 2014), VOLS 1-4（2014）

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摘要

In this work we present a novel word lattice filtering algorithm which removes redundancy from lattices. We use the filtering algorithm to analyze lattices obtained from dynamic network and transducer-based LVCSR decoders from several sites regarding size, coverage, and redundancy. We show that our filtering algorithm reduces the size of lattices by 30 to 90% without degrading the oracle word error rate.

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关键词

LVCSR,decoding,lattice,redundancy,filter

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