Re: [Kaldi-users] LM weight

[Daniel P. <dp...@gm...>]

By a lot of context I mean left-context and right-context, in the
splicing.  But I guess you are using one of the standard types of
model.
Dan


On Tue, Jun 23, 2015 at 12:24 AM, Kirill Katsnelson
<kir...@sm...> wrote:
> 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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