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egs/swahili/s5/local/score_combine.sh
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#!/bin/bash
# Copyright 2013 Arnab Ghoshal
# 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
min_lmwt=7
max_lmwt=17
lat_weights=
#end configuration section.
help_message="Usage: "$(basename $0)" [options] <data-dir> <graph-dir|lang-dir> <decode-dir1> <decode-dir2> [decode-dir3 ... ] <out-dir>
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
";
[ -f ./path.sh ] && . ./path.sh
. parse_options.sh || exit 1;
if [ $# -lt 5 ]; then
printf "$help_message
";
exit 1;
fi
data=$1
graphdir=$2
odir=${@: -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=${#decode_dirs[@]} # number of systems to combine
symtab=$graphdir/words.txt
[ ! -f $symtab ] && echo "$0: missing word symbol table '$symtab'" && exit 1;
[ ! -f $data/text ] && echo "$0: missing reference '$data/text'" && exit 1;
mkdir -p $odir/log
for i in `seq 0 $[num_sys-1]`; do
model=${decode_dirs[$i]}/../final.mdl # model one level up from decode dir
for f in $model ${decode_dirs[$i]}/lat.1.gz ; do
[ ! -f $f ] && echo "$0: expecting file $f to exist" && exit 1;
done
lats[$i]="\"ark:gunzip -c ${decode_dirs[$i]}/lat.*.gz |\""
done
mkdir -p $odir/scoring/log
cat $data/text | sed 's:<NOISE>::g' | sed 's:<SPOKEN_NOISE>::g' \
> $odir/scoring/test_filt.txt
if [ -z "$lat_weights" ]; then
$cmd LMWT=$min_lmwt:$max_lmwt $odir/log/combine_lats.LMWT.log \
lattice-combine --inv-acoustic-scale=LMWT ${lats[@]} ark:- \| \
lattice-mbr-decode --word-symbol-table=$symtab ark:- \
ark,t:$odir/scoring/LMWT.tra || exit 1;
else
$cmd LMWT=$min_lmwt:$max_lmwt $odir/log/combine_lats.LMWT.log \
lattice-combine --inv-acoustic-scale=LMWT --lat-weights=$lat_weights \
${lats[@]} ark:- \| \
lattice-mbr-decode --word-symbol-table=$symtab ark:- \
ark,t:$odir/scoring/LMWT.tra || exit 1;
fi
$cmd LMWT=$min_lmwt:$max_lmwt $odir/scoring/log/score.LMWT.log \
cat $odir/scoring/LMWT.tra \| \
utils/int2sym.pl -f 2- $symtab \| sed 's:\<UNK\>::g' \| \
compute-wer --text --mode=present \
ark:$odir/scoring/test_filt.txt ark,p:- ">&" $odir/wer_LMWT || exit 1;
exit 0
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