專題研究 (3)Viterbi DecodingTriphone Acoustic Model

Prof. Lin-Shan Lee, TA. Yun-Chiao Li

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03.04.mono0a.viterbi.sh04.04.tri1.viterbi.sh

Viterbi Decoding2

Viterbi Decoding

Instead of using WFST, we use Viterbi now

Converted Kaldi Acoustic model to HTK by Vulcan

(02.02.convert.htk.feat.sh)

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Convert the acoustic model from Kaldi to

HTK

Viterbi Decoding4

Using the dev set to find the best acoustic

weight (acwt)

04.01~04.04

Triphone Acoustic Model5

Triphone Acoustic Model 6

In monophone acoustic model, ㄅ、ㄆ、ㄇ they use their own model

In triphone acoustic model, ㄅ - ㄆ - ㄇ is a model

There will be too many model and lack of training data

Decision Tree

Use decision tree to tie similar models together

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04.01.tri1.train.sh (1/3)

It is very similar to 03.01

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04.01.tri1.train.sh (2/3)9

04.01.tri1.train.sh (3/3)10

bash 04.01.tri1.train.shbash 04.02.tri1.mkgraph.shbash 04.03.tri1.fst.shbash 04.04.tri1.viterbi.sh

Homework11

Some Helpful References

“使用加權有限狀態轉換器的基於混合詞與次詞

以文字及語音指令偵測口語詞彙” – 第三章 https://www.dropbox.com/s/

dsaqh6xa9dp3dzw/wfst_thesis.pdf

Check HDecode, HLRescore in HTK Book

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