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score_combine.sh
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score_combine.sh
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#!/usr/bin/env bash
# Copyright 2012-2013 Arnab Ghoshal
# Johns Hopkins University (authors: Daniel Povey, Sanjeev Khudanpur)
# 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.
# Script for system combination using minimum Bayes risk decoding.
# This calls lattice-combine to create a union of lattices that have been
# normalized by removing the total forward cost from them. The resulting lattice
# is used as input to lattice-mbr-decode. This should not be put in steps/ or
# utils/ since the scores on the combined lattice must not be scaled.
# begin configuration section.
cmd=run.pl
beam=4 # prune the lattices prior to MBR decoding, for speed.
stage=0
cer=0
decode_mbr=true
lat_weights=
word_ins_penalty=0.0
min_lmwt=7
max_lmwt=17
parallel_opts="--num-threads 3"
skip_scoring=false
ctm_name=
#end configuration section.
help_message="Usage: "$(basename $0)" [options] <data-dir> <graph-dir|lang-dir> <decode-dir1>[:lmwt-bias] <decode-dir2>[:lmwt-bias] [<decode-dir3>[:lmwt-bias] ... ] <out-dir>
E.g. "$(basename $0)" data/test data/lang exp/tri1/decode exp/tri2/decode exp/tri3/decode exp/combine
or: "$(basename $0)" data/test data/lang exp/tri1/decode exp/tri2/decode:18 exp/tri3/decode:13 exp/combine
Options:
--cmd (run.pl|queue.pl...) # specify how to run the sub-processes.
--min-lmwt INT # minumum LM-weight for lattice rescoring
--max-lmwt INT # maximum LM-weight for lattice rescoring
--lat-weights STR # colon-separated string of lattice weights
--cmd (run.pl|queue.pl...) # specify how to run the sub-processes.
--stage (0|1|2) # (createCTM | filterCTM | runSclite).
--parallel-opts <string> # extra options to command for combination stage,
# default '--num-threads 3'
--cer (0|1) # compute CER in addition to WER
";
[ -f ./path.sh ] && . ./path.sh
. parse_options.sh || exit 1;
if [ $# -lt 5 ]; then
printf "$help_message\n";
exit 1;
fi
data=$1
lang=$2
dir=${@: -1} # last argument to the script
shift 2;
decode_dirs=( $@ ) # read the remaining arguments into an array
unset decode_dirs[${#decode_dirs[@]}-1] # 'pop' the last argument which is odir
num_sys=${#decode_dirs[@]} # number of systems to combine
#Let the user to set the CTM file name
#use the data-dir name in case the user doesn't care
if [ -z ${ctm_name} ] ; then
ctm_name=`basename $data`
fi
for f in $lang/words.txt $lang/phones/word_boundary.int ; do
[ ! -f $f ] && echo "$0: file $f does not exist" && exit 1;
done
if ! $skip_scoring ; then
for f in $data/stm; do
[ ! -f $f ] && echo "$0: file $f does not exist" && exit 1;
done
fi
mkdir -p $dir/log
for i in `seq 0 $[num_sys-1]`; do
decode_dir=${decode_dirs[$i]}
offset=`echo $decode_dir | cut -d: -s -f2` # add this to the lm-weight.
decode_dir=`echo $decode_dir | cut -d: -f1`
[ -z "$offset" ] && offset=0
model=`dirname $decode_dir`/final.mdl # model one level up from decode dir
for f in $model $decode_dir/lat.1.gz ; do
[ ! -f $f ] && echo "$0: expecting file $f to exist" && exit 1;
done
if [ $i -eq 0 ]; then
nj=`cat $decode_dir/num_jobs` || exit 1;
else
if [ $nj != `cat $decode_dir/num_jobs` ]; then
echo "$0: number of decoding jobs mismatches, $nj versus `cat $decode_dir/num_jobs`"
exit 1;
fi
fi
file_list=""
# I want to get the files in the correct order so we can use ",s,cs" to avoid
# memory blowup. I first tried a pattern like file.{1,2,3,4}.gz, but if the
# system default shell is not bash (e.g. dash, in debian) this will not work,
# so we enumerate all the input files. This tends to make the command lines
# very long.
for j in `seq $nj`; do file_list="$file_list $decode_dir/lat.$j.gz"; done
lats[$i]="ark,s,cs:lattice-scale --inv-acoustic-scale=\$[$offset+LMWT] 'ark:gunzip -c $file_list|' ark:- | \
lattice-add-penalty --word-ins-penalty=$word_ins_penalty ark:- ark:- | \
lattice-prune --beam=$beam ark:- ark:- | \
lattice-align-words $lang/phones/word_boundary.int $model ark:- ark:- |"
done
mkdir -p $dir/scoring/log
if [ -z "$lat_weights" ]; then
lat_weights=1.0
for i in `seq $[$num_sys-1]`; do lat_weights="$lat_weights:1.0"; done
fi
if [ $stage -le 0 ]; then
$cmd $parallel_opts LMWT=$min_lmwt:$max_lmwt $dir/log/combine_lats.LMWT.log \
mkdir -p $dir/score_LMWT/ '&&' \
lattice-combine --lat-weights=$lat_weights "${lats[@]}" ark:- \| \
lattice-to-ctm-conf --decode-mbr=true ark:- - \| \
utils/int2sym.pl -f 5 $lang/words.txt \| \
utils/convert_ctm.pl $data/segments $data/reco2file_and_channel \
'>' $dir/score_LMWT/${ctm_name}.ctm || exit 1;
fi
if [ $stage -le 1 ]; then
# Remove some stuff we don't want to score, from the ctm.
for lmwt in `seq $min_lmwt $max_lmwt`; do
x=$dir/score_${lmwt}/${ctm_name}.ctm
[ ! -f $x ] && echo "File $x does not exist! Exiting... " && exit 1
cp $x $x.bkup1;
cat $x.bkup1 | grep -v -E '\[NOISE|LAUGHTER|VOCALIZED-NOISE\]' | \
grep -v -E '<UNK>|%HESITATION|\(\(\)\)' | \
grep -v -E '<eps>' | \
grep -v -E '<noise>' | \
grep -v -E '<silence>' | \
grep -v -E '<unk>' | \
grep -v -E '<v-noise>' | \
perl -e '@list = (); %list = ();
while(<>) {
chomp;
@col = split(" ", $_);
push(@list, $_);
$key = "$col[0]" . " $col[1]";
$list{$key} = 1;
}
foreach(sort keys %list) {
$key = $_;
foreach(grep(/$key/, @list)) {
print "$_\n";
}
}' > $x;
cp $x $x.bkup2;
done
fi
if ! $skip_scoring ; then
if [ $stage -le 2 ]; then
local/score_stm.sh --min-lmwt $min_lmwt --max-lmwt $max_lmwt $data $lang $dir || exit 1
fi
fi
exit 0