Re: [Kaldi-users] LM weight

[Kirill K. <kir...@sm...>]

The majority of the WER comes from subs, so this part looks pretty normal.

A lot of acoustic context--probably, depending on the definition of "a lot." :-) Not sure I understand this part. How can I tell? It makes sense, looking at the base dev set figures that I got training the model from the first 500 hr of the librispeech corpus (best range of 16-17). Which are still higher than the reference in the RESULTS for the full 1Khr corpus, which is rather in the 12-15 range.

 -kkm

> -----Original Message-----
> From: Daniel Povey [mailto:dp...@gm...]
> Sent: 2015-06-22 2059
> To: Kirill Katsnelson
> Cc: Nagendra Goel; kal...@li...
> Subject: Re: [Kaldi-users] LM weight
> 
> Usually if there is a lot of acoustic context in your model you will
> require a larger LM weight.
> Also, if for some reason there tend to be a lot of insertions in
> decoding (e.g. something weird went wrong in training, or there is some
> kind of normalization problem), a large LM weight can help reduce
> insertions and so improve the WER.
> 
> Dan
> 
> 
> On Mon, Jun 22, 2015 at 11:36 PM, Kirill Katsnelson
> <kir...@sm...> wrote:
> > I am getting the same ratio on both small and more targeted, and a
> quite large general LM. I do not understand what to make out if it!
> >
> >  -kkm
> >
> >> -----Original Message-----
> >> From: Nagendra Goel [mailto:nag...@go...]
> >> Sent: 2015-06-22 2032
> >> To: Kirill Katsnelson; kal...@li...
> >> Subject: RE: [Kaldi-users] LM weight
> >>
> >> Or maybe your domain is limited and LM very nicely matched to the
> >> task at hand?
> >>
> >> -----Original Message-----
> >> From: Kirill Katsnelson [mailto:kir...@sm...]
> >> Sent: Monday, June 22, 2015 11:29 PM
> >> To: kal...@li...
> >> Subject: [Kaldi-users] LM weight
> >>
> >> I my test sets I am getting the best WER at LM/acoustic weight in
> the
> >> range of 18-19, with multiple LMs of different size and origin. I
> was
> >> usually thinking the usual ballpark figure about 10, give or take.
> >> From your experience, does this larger LM weight mean anything, and
> >> what if it does? I am guessing an inadequate acoustic model,
> >> requiring more LM "pull"--am I making sense?
> >>
> >>  -kkm
> >>
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