ctm for words

[miamoto9]

Hello! I have an HMM-DNN trained model and I have a script that creates the alignment and ctm file for a given audio file and corresponding transcription.  

I am using get_train_ctm.sh to do it, but I am getting times at the utterance level. Because of this I created the segments file and a reco2file_and_channel file ("utt_id utt_id A"). The original wav file that I am working with has around 38 seconds. After creating these 2 mentioned files, I am getting the same result I was obtaining before, at the utterance level. The TRUe for segments is on. Anyone knows what can be the error? 

Can I create the  reco2file_and_channel like I mentioned above? 

Thanks

[Daniel Povey]

get_train_ctm.sh should use the segments and reco2file_and_channel files, if $data/segments is present and you don't specify "--segments false".

That shouldn't be hard to debug.

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[miamoto9]

Maybe the problem is in the alignment step? I have a chain model and I am doing alignment with steps/nnet3/align.sh using online ivectors extracted for my single utterance. Is this the correct approach? 

Thanks

[Daniel Povey]

You may need the option

--frame-shift 0.03

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[miamoto9]

Yes, i found that in some other chat from kaldi help. Thanks! 

Do you recommend using the chain model or the last hmm/gmm model to get ctm file and alignment file? 

[Daniel Povey]

Either should be OK

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