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Posted to dev@joshua.apache.org by "Lewis John McGibbney (JIRA)" <ji...@apache.org> on 2016/04/05 07:29:25 UTC

[jira] [Reopened] (JOSHUA-169) LanguageModelFF should compute partial n-grams

     [ https://issues.apache.org/jira/browse/JOSHUA-169?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lewis John McGibbney reopened JOSHUA-169:
-----------------------------------------

> LanguageModelFF should compute partial n-grams
> ----------------------------------------------
>
>                 Key: JOSHUA-169
>                 URL: https://issues.apache.org/jira/browse/JOSHUA-169
>             Project: Joshua
>          Issue Type: Bug
>            Reporter: Matt Post
>             Fix For: 6.1
>
>
> Incomplete n-grams have no estimate, which creates a problem when comparing small phrases (early in decoding) and for short sentences. To fix this, the LanguageModelFF should compute partial n-gram scores, caching the result and the n-gram length in the DP state so that it can be subtracted off later. 
> Another advantage of this is that it would likely allow a large simplification of the FeatureFunction interface, since we would no longer need a computeFinal distinction



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