Initial commit: FunASR Speech Recognition Toolkit

Add complete FunASR codebase including models, runtime, and documentation.

fun_text_processing/text_normalization/en/verbalizers/telephone.py

@@ -0,0 +1,54 @@
+import pynini
+from fun_text_processing.text_normalization.en.graph_utils import (
+    DAMO_NOT_QUOTE,
+    GraphFst,
+    delete_space,
+    insert_space,
+)
+from pynini.lib import pynutil
+
+
+class TelephoneFst(GraphFst):
+    """
+    Finite state transducer for verbalizing telephone numbers, e.g.
+        telephone { country_code: "one" number_part: "one two three, one two three, five six seven eight" extension: "one"  }
+        -> one, one two three, one two three, five six seven eight, one
+
+    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="telephone", kind="verbalize", deterministic=deterministic)
+
+        optional_country_code = pynini.closure(
+            pynutil.delete('country_code: "')
+            + pynini.closure(DAMO_NOT_QUOTE, 1)
+            + pynutil.delete('"')
+            + delete_space
+            + insert_space,
+            0,
+            1,
+        )
+
+        number_part = (
+            pynutil.delete('number_part: "')
+            + pynini.closure(DAMO_NOT_QUOTE, 1)
+            + pynini.closure(pynutil.add_weight(pynutil.delete(" "), -0.0001), 0, 1)
+            + pynutil.delete('"')
+        )
+
+        optional_extension = pynini.closure(
+            delete_space
+            + insert_space
+            + pynutil.delete('extension: "')
+            + pynini.closure(DAMO_NOT_QUOTE, 1)
+            + pynutil.delete('"'),
+            0,
+            1,
+        )
+
+        graph = optional_country_code + number_part + optional_extension
+        delete_tokens = self.delete_tokens(graph)
+        self.fst = delete_tokens.optimize()