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Table 2

Test perplexity of k-gram models obtained by different approximation methods for the English Broadcast News corpus. We use 32M samples for both WFA-SampleKatz(⋅) and WFA-SampleApprox(⋅).

ModelTest perplexity
Katz 144.4 
WFA-SampleKatz(⋅) 151.8 
Arisoy et al. (2014) 159.6 
Adel et al. (2014) 146.7 
WFA-SampleApprox(⋅) (KT) 140.8 
WFA-SampleApprox(⋅) (UT) 143.9 
ModelTest perplexity
Katz 144.4 
WFA-SampleKatz(⋅) 151.8 
Arisoy et al. (2014) 159.6 
Adel et al. (2014) 146.7 
WFA-SampleApprox(⋅) (KT) 140.8 
WFA-SampleApprox(⋅) (UT) 143.9 
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