timit_format_data.sh
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#!/bin/bash
# Copyright 2013 (Author: Daniel Povey)
# Apache 2.0
# This script takes data prepared in a corpus-dependent way
# in data/local/, and converts it into the "canonical" form,
# in various subdirectories of data/, e.g. data/lang, data/train, etc.
. ./path.sh || exit 1;
echo "Preparing train, dev and test data"
srcdir=data/local/data
lmdir=data/local/nist_lm
tmpdir=data/local/lm_tmp
lexicon=data/local/dict/lexicon.txt
mkdir -p $tmpdir
for x in train dev test; do
mkdir -p data/$x
cp $srcdir/${x}_wav.scp data/$x/wav.scp || exit 1;
cp $srcdir/$x.text data/$x/text || exit 1;
cp $srcdir/$x.spk2utt data/$x/spk2utt || exit 1;
cp $srcdir/$x.utt2spk data/$x/utt2spk || exit 1;
utils/filter_scp.pl data/$x/spk2utt $srcdir/$x.spk2gender > data/$x/spk2gender || exit 1;
cp $srcdir/${x}.stm data/$x/stm
cp $srcdir/${x}.glm data/$x/glm
utils/validate_data_dir.sh --no-feats data/$x || exit 1
done
# Next, for each type of language model, create the corresponding FST
# and the corresponding lang_test_* directory.
echo Preparing language models for test
for lm_suffix in bg; do
test=data/lang_test_${lm_suffix}
mkdir -p $test
cp -r data/lang/* $test
gunzip -c $lmdir/lm_phone_${lm_suffix}.arpa.gz | \
arpa2fst --disambig-symbol=#0 \
--read-symbol-table=$test/words.txt - $test/G.fst
fstisstochastic $test/G.fst
# The output is like:
# 9.14233e-05 -0.259833
# we do expect the first of these 2 numbers to be close to zero (the second is
# nonzero because the backoff weights make the states sum to >1).
# Because of the <s> fiasco for these particular LMs, the first number is not
# as close to zero as it could be.
# Everything below is only for diagnostic.
# Checking that G has no cycles with empty words on them (e.g. <s>, </s>);
# this might cause determinization failure of CLG.
# #0 is treated as an empty word.
mkdir -p $tmpdir/g
awk '{if(NF==1){ printf("0 0 %s %s\n", $1,$1); }} END{print "0 0 #0 #0"; print "0";}' \
< "$lexicon" >$tmpdir/g/select_empty.fst.txt
fstcompile --isymbols=$test/words.txt --osymbols=$test/words.txt $tmpdir/g/select_empty.fst.txt | \
fstarcsort --sort_type=olabel | fstcompose - $test/G.fst > $tmpdir/g/empty_words.fst
fstinfo $tmpdir/g/empty_words.fst | grep cyclic | grep -w 'y' &&
echo "Language model has cycles with empty words" && exit 1
rm -r $tmpdir/g
done
utils/validate_lang.pl data/lang_test_bg || exit 1
echo "Succeeded in formatting data."
rm -r $tmpdir