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| import pynini
| from fun_text_processing.text_normalization.en.graph_utils import (
| DAMO_CHAR,
| DAMO_SIGMA,
| GraphFst,
| delete_space,
| )
| from pynini.lib import pynutil
|
|
| class WordFst(GraphFst):
| """
| Finite state transducer for verbalizing word
| e.g. tokens { name: "sleep" } -> sleep
|
| Args:
| deterministic: if True will provide a single transduction option,
| for False multiple transduction are generated (used for audio-based normalization)
| """
|
| def __init__(self, deterministic: bool = True):
| super().__init__(name="word", kind="verbalize", deterministic=deterministic)
| chars = pynini.closure(DAMO_CHAR - " ", 1)
| char = (
| pynutil.delete("name:")
| + delete_space
| + pynutil.delete('"')
| + chars
| + pynutil.delete('"')
| )
| graph = char @ pynini.cdrewrite(pynini.cross("\u00A0", " "), "", "", DAMO_SIGMA)
|
| self.fst = graph.optimize()
|
|
