Re: [Kaldi-users] LibriSpeech DNN forced alignments

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

It expects 140 because 140 = 40 + 100, the 40 is the "hires" MFCC
features (the Librispeech scripts create these from the wav data), and
the 100 is the iVector features.  You would have to get these from the
iVector extractor.
However, you may find your life is easier if you use
steps/online/nnet2/align.sh, that will start from the wav data and do
the feature extraction itself.
Dan


On Fri, Jun 26, 2015 at 4:41 PM, Mate Andre <ele...@gm...> wrote:
> My goal is to find alignments for the 960-hour LibriSpeech dataset. I am
> using the nnet2_online/nnet_a LibriSpeech model from the Kaldi-ASR site, and
> I am running the steps/nnet2/align.sh script in Kaldi's LibriSpeech folder
> using the following command:
>
> steps/nnet2/align.sh --nj 10 --cmd 'run.pl' data/train_960 data/lang_nosp
> exp/nnet2_online/nnet_a exp/nnet2_online/nnet_a_ali
>
> where exp/nnet2_online/nnet_a contains the files in nnet2_online/nnet_a and
> exp/nnet2_online/nnet_a_ali is an empty directory.
>
> I'm getting the following error in the log files:
>
> ERROR (nnet-align-compiled:NnetComputer():nnet-compute.cc:70) Feature
> dimension is 13 but network expects 140
>
> Am I using the correct script to generate the alignments, or is there
> another reason I am getting this error?
>
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