[SRILM User List] Interpolating LMs with different smoothing

[Fed Ang]

Hi,

I don't know if it has been asked before, but does it make sense to
interpolate on the basis of smoothing instead of domain/genre?  What should
be the assumptions in considering this when the resulting perplexity is
lower than any of the two separately?

Let's say: 5-gram Katz yields 100, and 5-gram Modified KN yields 90
Then best-mix of the two yields 87

On a theoretical perspective, is it sound to simply trust that the
interpolated LM is better/generalizable to different smoothing combinations?

-Fred
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