You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
3.7 KiB
88 lines
3.7 KiB
#!/bin/bash
|
|
# Copyright 2015 Yajie Miao (Carnegie Mellon University)
|
|
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
# KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
|
|
# WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
|
|
# MERCHANTABLITY OR NON-INFRINGEMENT.
|
|
# See the Apache 2 License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
# This script compiles the lexicon and CTC tokens into FSTs. FST compiling slightly differs between the
|
|
# phoneme and character-based lexicons.
|
|
set -eo pipefail
|
|
. utils/parse_options.sh
|
|
|
|
if [ $# -ne 3 ]; then
|
|
echo "usage: utils/fst/compile_lexicon_token_fst.sh <dict-src-dir> <tmp-dir> <lang-dir>"
|
|
echo "e.g.: utils/fst/compile_lexicon_token_fst.sh data/local/dict data/local/lang_tmp data/lang"
|
|
echo "<dict-src-dir> should contain the following files:"
|
|
echo "lexicon.txt lexicon_numbers.txt units.txt"
|
|
echo "options: "
|
|
exit 1;
|
|
fi
|
|
|
|
srcdir=$1
|
|
tmpdir=$2
|
|
dir=$3
|
|
mkdir -p $dir $tmpdir
|
|
|
|
[ -f path.sh ] && . ./path.sh
|
|
|
|
cp $srcdir/units.txt $dir
|
|
|
|
# Add probabilities to lexicon entries. There is in fact no point of doing this here since all the entries have 1.0.
|
|
# But utils/make_lexicon_fst.pl requires a probabilistic version, so we just leave it as it is.
|
|
perl -ape 's/(\S+\s+)(.+)/${1}1.0\t$2/;' < $srcdir/lexicon.txt > $tmpdir/lexiconp.txt || exit 1;
|
|
|
|
# Add disambiguation symbols to the lexicon. This is necessary for determinizing the composition of L.fst and G.fst.
|
|
# Without these symbols, determinization will fail.
|
|
# default first disambiguation is #1
|
|
ndisambig=`utils/fst/add_lex_disambig.pl $tmpdir/lexiconp.txt $tmpdir/lexiconp_disambig.txt`
|
|
# add #0 (#0 reserved for symbol in grammar).
|
|
ndisambig=$[$ndisambig+1];
|
|
|
|
( for n in `seq 0 $ndisambig`; do echo '#'$n; done ) > $tmpdir/disambig.list
|
|
|
|
# Get the full list of CTC tokens used in FST. These tokens include <eps>, the blank <blk>,
|
|
# the actual model unit, and the disambiguation symbols.
|
|
cat $srcdir/units.txt | awk '{print $1}' > $tmpdir/units.list
|
|
(echo '<eps>';) | cat - $tmpdir/units.list $tmpdir/disambig.list | awk '{print $1 " " (NR-1)}' > $dir/tokens.txt
|
|
|
|
# ctc_token_fst_corrected is too big and too slow for character based chinese modeling,
|
|
# so here just use simple ctc_token_fst
|
|
utils/fst/ctc_token_fst.py --token_file $dir/tokens.txt | \
|
|
fstcompile --isymbols=$dir/tokens.txt --osymbols=$dir/tokens.txt --keep_isymbols=false --keep_osymbols=false | \
|
|
fstarcsort --sort_type=olabel > $dir/T.fst || exit 1;
|
|
|
|
# Encode the words with indices. Will be used in lexicon and language model FST compiling.
|
|
cat $tmpdir/lexiconp.txt | awk '{print $1}' | sort | awk '
|
|
BEGIN {
|
|
print "<eps> 0";
|
|
}
|
|
{
|
|
printf("%s %d\n", $1, NR);
|
|
}
|
|
END {
|
|
printf("#0 %d\n", NR+1);
|
|
printf("<s> %d\n", NR+2);
|
|
printf("</s> %d\n", NR+3);
|
|
}' > $dir/words.txt || exit 1;
|
|
|
|
# Now compile the lexicon FST. Depending on the size of your lexicon, it may take some time.
|
|
token_disambig_symbol=`grep \#0 $dir/tokens.txt | awk '{print $2}'`
|
|
word_disambig_symbol=`grep \#0 $dir/words.txt | awk '{print $2}'`
|
|
|
|
utils/fst/make_lexicon_fst.pl --pron-probs $tmpdir/lexiconp_disambig.txt 0 "sil" '#'$ndisambig | \
|
|
fstcompile --isymbols=$dir/tokens.txt --osymbols=$dir/words.txt \
|
|
--keep_isymbols=false --keep_osymbols=false | \
|
|
fstaddselfloops "echo $token_disambig_symbol |" "echo $word_disambig_symbol |" | \
|
|
fstarcsort --sort_type=olabel > $dir/L.fst || exit 1;
|
|
|
|
echo "Lexicon and Token FSTs compiling succeeded" |