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fix mmi graph compiler bug. (#895)

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emilyluj 2023-02-09 18:32:03 +08:00 committed by GitHub
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icefall/mmi_graph_compiler.py
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@ -74,7 +74,9 @@ class MmiTrainingGraphCompiler(object):
# CAUTION: The following line is crucial. # CAUTION: The following line is crucial.
# Arcs entering the back-off state have label equal to #0. # Arcs entering the back-off state have label equal to #0.
# We have to change it to 0 here. # We have to change it to 0 here.
P.labels[P.labels >= first_token_disambig_id] = 0 labels = P.labels.clone()
labels[labels >= first_token_disambig_id] = 0
P.labels = labels
P = k2.remove_epsilon(P) P = k2.remove_epsilon(P)
P = k2.arc_sort(P) P = k2.arc_sort(P)