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src/bin/weight-silence-post.cc
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// bin/weight-silence-post.cc
// Copyright 2009-2013 Microsoft Corporation
// Johns Hopkins University (author: Daniel Povey)
// See ../../COPYING for clarification regarding multiple authors
//
// 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.
#include "base/kaldi-common.h"
#include "util/common-utils.h"
#include "gmm/am-diag-gmm.h"
#include "hmm/transition-model.h"
#include "hmm/hmm-utils.h"
#include "hmm/posterior.h"
int main(int argc, char *argv[]) {
using namespace kaldi;
typedef kaldi::int32 int32;
try {
const char *usage =
"Apply weight to silences in posts
"
"Usage: weight-silence-post [options] <silence-weight> <silence-phones> "
"<model> <posteriors-rspecifier> <posteriors-wspecifier>
"
"e.g.:
"
" weight-silence-post 0.0 1:2:3 1.mdl ark:1.post ark:nosil.post
";
ParseOptions po(usage);
bool distribute = false;
po.Register("distribute", &distribute, "If true, rather than weighting the "
"individual posteriors, apply the weighting to the whole frame: "
"i.e. on time t, scale all posterior entries by "
"p(sil)*silence-weight + p(non-sil)*1.0");
po.Read(argc, argv);
if (po.NumArgs() != 5) {
po.PrintUsage();
exit(1);
}
std::string silence_weight_str = po.GetArg(1),
silence_phones_str = po.GetArg(2),
model_rxfilename = po.GetArg(3),
posteriors_rspecifier = po.GetArg(4),
posteriors_wspecifier = po.GetArg(5);
BaseFloat silence_weight = 0.0;
if (!ConvertStringToReal(silence_weight_str, &silence_weight))
KALDI_ERR << "Invalid silence-weight parameter: expected float, got \""
<< silence_weight_str << '"';
std::vector<int32> silence_phones;
if (!SplitStringToIntegers(silence_phones_str, ":", false, &silence_phones))
KALDI_ERR << "Invalid silence-phones string " << silence_phones_str;
if (silence_phones.empty())
KALDI_WARN <<"No silence phones, this will have no effect";
ConstIntegerSet<int32> silence_set(silence_phones); // faster lookup.
TransitionModel trans_model;
ReadKaldiObject(model_rxfilename, &trans_model);
int32 num_posteriors = 0;
SequentialPosteriorReader posterior_reader(posteriors_rspecifier);
PosteriorWriter posterior_writer(posteriors_wspecifier);
for (; !posterior_reader.Done(); posterior_reader.Next()) {
num_posteriors++;
// Posterior is vector<vector<pair<int32, BaseFloat> > >
Posterior post = posterior_reader.Value();
// Posterior is vector<vector<pair<int32, BaseFloat> > >
if (distribute)
WeightSilencePostDistributed(trans_model, silence_set,
silence_weight, &post);
else
WeightSilencePost(trans_model, silence_set,
silence_weight, &post);
posterior_writer.Write(posterior_reader.Key(), post);
}
KALDI_LOG << "Done " << num_posteriors << " posteriors.";
return (num_posteriors != 0 ? 0 : 1);
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}
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