tjysdsg / kaldi-align-to-phones

Use kaldi pretrained nnet3 model to align individual sentences and get phone-level transcripts

Prerequisites

• Trained kaldi nnet3 model, including the following files:
  • final.mdl
  • tree
  • L.fst
  • phones.txt
  • words.txt
  • text
  • scp file for calculated ivectors
  • scp file for MFCC features

How it works

1. Compile train graphs using the lexicon graph. This graph is specific to the individual sentences which leads to better performance than using the entire HCLG graph
2. Use the trained model, train graphs, ivectors, and MFCCs to perform force alignment. This produces exp/1.ali
3. Calculate the phone sequences from exp/1.ali. And use clean-phones.py to remove position dependency and stress

The output will be in exp/trans_cleaned.txt

There are other parameters that can be set in nnet3-align-to-phones.sh