From 162ef07eb94fddd2ec0adca4892a6108bed46138 Mon Sep 17 00:00:00 2001
From: Arthur031221 <levi74108520963@gmail.com>
Date: Fri, 2 Oct 2026 11:22:22 +0800
Subject: [PATCH] fix: retain unpunctuated tail in sentence timestamps

---
 funasr/utils/timestamp_tools.py | 20 +++++++++++++++++
 tests/test_punc_model_none.py   | 27 +++++++++++++++++++++++
 tests/test_timestamp_tools.py   | 39 +++++++++++++++++++++++++++++++++
 3 files changed, 86 insertions(+)

diff --git a/funasr/utils/timestamp_tools.py b/funasr/utils/timestamp_tools.py
index fb77702eb6..b97e405f33 100644
--- a/funasr/utils/timestamp_tools.py
+++ b/funasr/utils/timestamp_tools.py
@@ -216,6 +216,16 @@ def timestamp_sentence(
             sentence_text_seg = ""
             ts_list = []
             sentence_start = None
+    if sentence_text and all(timestamp is not None for timestamp in ts_list):
+        sentence = {
+            "text": sentence_text,
+            "start": sentence_start,
+            "end": sentence_end,
+            "timestamp": ts_list,
+        }
+        if return_raw_text:
+            sentence["raw_text"] = sentence_text_seg.rstrip()
+        res.append(sentence)
     return res
 
 
@@ -310,4 +320,14 @@ def timestamp_sentence_en(
             sentence_text_seg = ""
             ts_list = []
             sentence_start = None
+    if sentence_text and all(timestamp is not None for timestamp in ts_list):
+        sentence = {
+            "text": sentence_text,
+            "start": sentence_start,
+            "end": sentence_end,
+            "timestamp": ts_list,
+        }
+        if return_raw_text:
+            sentence["raw_text"] = sentence_text_seg.rstrip()
+        res.append(sentence)
     return res
diff --git a/tests/test_punc_model_none.py b/tests/test_punc_model_none.py
index c803b822cc..4e14eb705d 100644
--- a/tests/test_punc_model_none.py
+++ b/tests/test_punc_model_none.py
@@ -646,6 +646,33 @@ def test_sentence_timestamp_ignores_empty_asr_words(self, mock_prep, mock_load,
 
         self.assertEqual(results[0]["sentence_info"][0]["text"], "你好。")
 
+    @patch("funasr.auto.auto_model.slice_padding_audio_samples")
+    @patch("funasr.auto.auto_model.load_audio_text_image_video")
+    @patch("funasr.auto.auto_model.prepare_data_iterator")
+    def test_sentence_timestamp_keeps_unpunctuated_tail_without_asr_words(
+        self, mock_prep, mock_load, mock_slice
+    ):
+        am = self._make_auto_model(punc_model=MagicMock())
+        results_seq = [
+            [{"key": "test_utt", "value": [[0, 300]]}],
+            [{"text": "hello world", "timestamp": [[0, 100], [100, 300]]}],
+            [{"text": "hello world", "punc_array": [1, 1]}],
+        ]
+        am.inference = MagicMock(side_effect=lambda *args, **kwargs: results_seq.pop(0))
+        mock_prep.return_value = (["test_utt"], [np.zeros(4800, dtype=np.float32)])
+        mock_load.return_value = np.zeros(4800, dtype=np.float32)
+        mock_slice.return_value = ([np.zeros(4800, dtype=np.float32)], [4800])
+
+        result = am.inference_with_vad(
+            "dummy_input", sentence_timestamp=True, en_post_proc=True
+        )
+
+        self.assertEqual(
+            [item["text"].strip() for item in result[0]["sentence_info"]],
+            ["hello world"],
+        )
+        self.assertEqual(result[0]["sentence_info"][0]["timestamp"], [[0, 100], [100, 300]])
+
     @patch("funasr.auto.auto_model.slice_padding_audio_samples")
     @patch("funasr.auto.auto_model.load_audio_text_image_video")
     @patch("funasr.auto.auto_model.prepare_data_iterator")
diff --git a/tests/test_timestamp_tools.py b/tests/test_timestamp_tools.py
index d5af9408e5..a9dd41d18e 100644
--- a/tests/test_timestamp_tools.py
+++ b/tests/test_timestamp_tools.py
@@ -1,3 +1,5 @@
+import pytest
+
 from funasr.utils.timestamp_tools import timestamp_sentence, timestamp_sentence_en
 
 
@@ -64,3 +66,40 @@ def test_timestamp_sentence_raw_text_keeps_token_separators():
     )
 
     assert [sentence["raw_text"] for sentence in result] == ["我 用", "iphone pro max"]
+
+
+@pytest.mark.parametrize(
+    ("splitter", "words", "first", "last"),
+    [
+        (timestamp_sentence, "你 好 世界", "你好。", "世界"),
+        (timestamp_sentence_en, "hello world again", "hello world.", "again"),
+    ],
+)
+def test_timestamp_sentence_keeps_unpunctuated_tail(splitter, words, first, last):
+    result = splitter(
+        [1, 3, 1],
+        [[0, 100], [100, 200], [200, 300]],
+        words,
+        return_raw_text=True,
+    )
+
+    assert [sentence["text"].strip() for sentence in result] == [first, last]
+    assert result[-1] == {
+        "text": last,
+        "start": 200,
+        "end": 300,
+        "timestamp": [[200, 300]],
+        "raw_text": last,
+    }
+
+
+@pytest.mark.parametrize("splitter", [timestamp_sentence, timestamp_sentence_en])
+def test_timestamp_sentence_does_not_emit_tail_without_its_timestamp(splitter):
+    result = splitter(
+        [1, 3, 1],
+        [[0, 100], [100, 200]],
+        "hello world again",
+    )
+
+    assert len(result) == 1
+    assert result[0]["end"] == 200