43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
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// fstext/push-special.h
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// Copyright 2012-2015 Johns Hopkins University (author: Daniel Povey)
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// See ../../COPYING for clarification regarding multiple authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
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// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
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// MERCHANTABLITY OR NON-INFRINGEMENT.
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// See the Apache 2 License for the specific language governing permissions and
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// limitations under the License.
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#ifndef KALDI_FSTEXT_PUSH_SPECIAL_H_
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#define KALDI_FSTEXT_PUSH_SPECIAL_H_
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#include <fst/fstlib.h>
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#include <fst/fst-decl.h>
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#include "util/const-integer-set.h"
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namespace fst {
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/*
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This function does weight-pushing, in the log semiring,
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but in a special way, such that any "leftover weight" after pushing
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gets distributed evenly along the FST, and doesn't end up either
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at the start or at the end. Basically it pushes the weights such
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that the total weight of each state (i.e. the sum of the arc
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probabilities plus the final-prob) is the same for all states.
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*/
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void PushSpecial(VectorFst<StdArc> *fst,
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float delta = kDelta);
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}
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#endif
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