kaldi monophone training outline
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This outline is based on the steps/train_mono.sh
script.
Use a subset of the training set to init the monophone model
synopsis
gmm-init-mono [options] Topo-in Dim Model-out Tree-out
commands
gmm-init-mono "--train-feats=$feats subset-feat --n=10 ark:- ark:-|"\ $lang/topo $feat_dim $dir/0.mdl $dir/tree
Compiling training graphs
synopsis
compile-train-graphs [options] Tree-in Model-in L-fst-in Trans-rspec Graph-wspec
commands
trans_rspec="ark:sym2int.pl --map-oov $oov_sym -f 2- $lang/words.txt < $sdata/JOB/text|"out_graphs="ark:|gzip -c>$dir/fsts.JOB.gz"compile-train-graphs $dir/tree $dir/0.mdl $lang/L.fst $trans_rspec $out_graph
Align data equally
synopsis
align-equal-compiled Graph-rspec Feats-rspec Align-wspecgmm-acc-stats-ali [options] Model-in Feat-rspec Align-rspec Stats-out
commands
graph="ark:gunzip -c $dir/fsts.JOB.gz|"align-equal-compiled $graph "$feats" ark,t:- | \gmm-acc-stats-ali --binary=true $dir/0.mdl "$feats" ark:-
Estimate GMM with equally aligned frames
synopsis
gmm-est [options] Model-in Stats-in Model-out
commands
gmm-est [options] $dir/0.mdl "gmm-sum-accs - $dir/0.*.acc|" $dir/1.mdl
Alternatively align data and update model
- align data according to
$realign_iters
- increase the amount of GMMs until
$max_iter_inc
, with(totgauss - numgauss) / max_iter_inc
each iteration - update GMMs in each iteration
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