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Parsing Inside-Out

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arxiv cmp-lg/9805007 v1 pith:4SQN5M6W submitted 1998-05-19 cmp-lg cs.CL

classification cmp-lgcs.CL
keywords inside-outsideparsingprobabilitiesusedaccuracyformalismparserreestimating
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The inside-outside probabilities are typically used for reestimating Probabilistic Context Free Grammars (PCFGs), just as the forward-backward probabilities are typically used for reestimating HMMs. I show several novel uses, including improving parser accuracy by matching parsing algorithms to evaluation criteria; speeding up DOP parsing by 500 times; and 30 times faster PCFG thresholding at a given accuracy level. I also give an elegant, state-of-the-art grammar formalism, which can be used to compute inside-outside probabilities; and a parser description formalism, which makes it easy to derive inside-outside formulas and many others.

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Cited by 1 Pith paper

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  1. Branch-and-bound method for calculating Viterbi path in triplet Markov models

    stat.CO 2025-07 conditional novelty 5.0 of 10

    A branch-and-bound algorithm with multiple bound types computes the most probable marginal path in triplet Markov models much faster than exhaustive search, with m-Viterbi giving the best lower bounds.

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