fix bug for blank audio (#1656)

jianganghan

2024-04-25 f8b4924060bb849680925e81ddf1e10ca406c225

 fun_text_processing/text_normalization/de/verbalizers/verbalize.py

@@ -1,4 +1,3 @@

from fun_text_processing.text_normalization.de.taggers.cardinal import CardinalFst as CardinalTagger
from fun_text_processing.text_normalization.de.verbalizers.cardinal import CardinalFst
from fun_text_processing.text_normalization.de.verbalizers.date import DateFst
@@ -17,7 +16,7 @@
class VerbalizeFst(GraphFst):
    """
    Composes other verbalizer grammars.
    For deployment, this grammar will be compiled and exported to OpenFst Finate State Archiv (FAR) File. 
    For deployment, this grammar will be compiled and exported to OpenFst Finate State Archiv (FAR) File.
    More details to deployment at NeMo/tools/text_processing_deployment.

    Args:
@@ -38,7 +37,9 @@
        fraction_graph = fraction.fst
        date = DateFst(ordinal=ordinal)
        date_graph = date.fst
        measure = MeasureFst(cardinal=cardinal, decimal=decimal, fraction=fraction, deterministic=deterministic)
        measure = MeasureFst(
            cardinal=cardinal, decimal=decimal, fraction=fraction, deterministic=deterministic
        )
        measure_graph = measure.fst
        electronic = ElectronicFst(deterministic=deterministic)
        electronic_graph = electronic.fst