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authoradam.d.lopez <adam.d.lopez@ec762483-ff6d-05da-a07a-a48fb63a330f>2010-07-13 03:27:59 +0000
committeradam.d.lopez <adam.d.lopez@ec762483-ff6d-05da-a07a-a48fb63a330f>2010-07-13 03:27:59 +0000
commit47c75319638866609f669346e15663c5ba43af7f (patch)
tree50bc1867bdb1ce27e679fb8981b1b805c4897cd6 /gi/posterior-regularisation/prjava/src/hmm
parenta2360c873ba8b72744e16752a067276a46d63645 (diff)
cdec now supports coarse-to-fine decoding (for SCFG only).
CTF has several options: -coarse_to_fine_beam_prune=<double> (required to activate CTF) assign an alpha parameter for pruning the coarse foreast -ctf_beam_widen=<double> (optional, defaults to 2.0): ratio to widen coarse pruning beam if fine parse fails. -ctf_num_widenings=<int> (optional, defaults to 2): number of times to widen coarse beam before defaulting to exhaustive source parsing -ctf_no_exhaustive (optional) do not attempt exhaustive parse if CTF fails to find a parse. Additionally, script extools/coarsen_grammar.pl will create a coarse-to-fine grammar (for X?? categories *only*). cdec will read CTF grammars in a format identical to the original, in which refinements of a rule immediately follow the coarse projection, preceded by an additional whitespace character. Not fully tested, but should be backwards compatible. Also not yet integrated into pipelines, but should work on the command line. git-svn-id: https://ws10smt.googlecode.com/svn/trunk@231 ec762483-ff6d-05da-a07a-a48fb63a330f
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