A question about Lattice::LatticeWER( )

Andreas Stolcke stolcke at speech.sri.com
Tue Aug 26 20:34:28 PDT 2008

liuchangliang wrote:
> Hi:
> I use lattice-tool to compute the lattice WER. In the result, the 
> insertion error is always very high.
> In the source code of function Lattice::LatticeWER( ), there is a 
> sentence:
> * NOTE: since we process nodes in topological order this
> * will allow chains of multiple insertions.
> I don’t know what this sentence mean? Does that mean the insertion 
> error of the result is not reliable ?
No. It is a comment regarding the workings of the algorithm that aligns 
a word string to the lattice, and that topological order is required for 
correct computation of insertions.


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