CODEWITHSUNDEEP
speech-recognitionmodelsvoice-recognitiontoolkit
Vipin YoYo
Vipin YoYo

Reputation: 113

How can I add new words or vocabulary into kaldi platform?

I am trying to create a ASR system with existing pre-trained models available as a sample. I got stuck in a place where how to add new words into that trained model, so that next time it will correctly return the word; Some sort of machine learning concept. Any ideas will be helpful.

Upvotes: 4

Views: 3022

Answers (1)

coldsheep
coldsheep

Reputation: 41

There are two things you might need:

  1. Lexicon: Try to find something like lexicon.txt in your data folder, add your words and corresponding phone sequences in it, like:

    speech s p iy ch
the dh ax
the dh iy

  2. Language Model: Find something like XXX.lm in your data folder, add your word in 1-gram with a probabiliy, like:

    \data\
ngram 1=200
ngram 2=4000
...

\1-grams
-7.3241 the
...

After this, make the decoder HCLG.fst again based on these 2 new files.

Note: Numbers in language will make the results of speech recognition different, you need to choose a proper number, or use toolkit srilm to generate it by the text of your corpus.

Upvotes: 2

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