add text frontend example

examples/fastspeech2/baker/README.md

@@ -1,5 +1,3 @@
-
-
 # FastSpeech2 with BZNSYP
 
 ## Dataset

examples/fastspeech2/baker/config.py

@@ -12,10 +12,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from pathlib import Path
+
 from yacs.config import CfgNode as Configuration
 import yaml
 
-with open("conf/default.yaml", 'rt') as f:
+config_path = (Path(__file__).parent / "conf" / "default.yaml").resolve()
+
+with open(config_path, 'rt') as f:
     _C = yaml.safe_load(f)
     _C = Configuration(_C)
 

examples/fastspeech2/baker/frontend.py

@@ -58,8 +58,17 @@ class Frontend():
                 # split tone from finals
                 match = re.match(r'^(\w+)([012345])$', full_phone)
                 if match:
-                    phones.append(match.group(1))
+                    phone = match.group(1)
-                    tones.append(match.group(2))
+                    tone = match.group(2)
+                    # if the merged erhua not in the vocab
+                    if len(phone) >= 2 and phone != "er" and phone[
+                            -1] == 'r' and phone not in self.vocab_phones and phone[:
+                                                                                    -1] in self.vocab_phones:
+                        phones.append(phone[:-1])
+                        phones.append("er")
+                    else:
+                        tones.append(tone)
+                        tones.append("2")
                 else:
                     phones.append(full_phone)
                     tones.append('0')
@@ -67,7 +76,17 @@ class Frontend():
             tone_ids = paddle.to_tensor(tone_ids)
             result["tone_ids"] = tone_ids
         else:
-            phones = phonemes
+            # if the merged erhua not in the vocab
+            phones = []
+            for phone in phonemes:
+                if len(phone) >= 3 and phone[:-1] != "er" and phone[
+                        -2] == 'r' and phone not in self.vocab_phones and (
+                            phone[:-2] + phone[-1]) in self.vocab_phones:
+                    phones.append((phone[:-2] + phone[-1]))
+                    phones.append("er2")
+                else:
+                    phones.append(phone)
+
         phone_ids = self._p2id(phones)
         phone_ids = paddle.to_tensor(phone_ids)
         result["phone_ids"] = phone_ids

examples/fastspeech2/baker/preprocess.py

@@ -267,7 +267,7 @@ def main():
         type=str,
         help="directory to baker dataset.")
     parser.add_argument(
-        "--dur-path",
+        "--dur-file",
         default=None,
         type=str,
         help="path to baker durations.txt.")
@@ -308,8 +308,13 @@ def main():
     root_dir = Path(args.rootdir).expanduser()
     dumpdir = Path(args.dumpdir).expanduser()
     dumpdir.mkdir(parents=True, exist_ok=True)
+    dur_file = Path(args.dur_file).expanduser()
+
+    assert root_dir.is_dir()
+    assert dur_file.is_file()
+
+    sentences = get_phn_dur(dur_file)
 
-    sentences = get_phn_dur(args.dur_path)
     deal_silence(sentences)
     phone_id_map_path = dumpdir / "phone_id_map.txt"
     get_input_token(sentences, phone_id_map_path)

examples/fastspeech2/baker/preprocess.sh

@@ -4,7 +4,7 @@
 python3 gen_duration_from_textgrid.py --inputdir ./baker_alignment_tone --output durations.txt
 
 # extract features
-python3 preprocess.py --rootdir=~/datasets/BZNSYP/ --dumpdir=dump --dur-path durations.txt --num-cpu 4 --cut-sil True
+python3 preprocess.py --rootdir=~/datasets/BZNSYP/ --dumpdir=dump --dur-file durations.txt --num-cpu 4 --cut-sil True
 
 # # get features' stats(mean and std)
 python3 compute_statistics.py --metadata=dump/train/raw/metadata.jsonl --field-name="speech"

examples/text_frontend/README.md

@@ -0,0 +1,20 @@
+# Chinese Text Frontend Example
+Here's an example for Chinese text frontend, including g2p and text normalization.
+## G2P
+For g2p, we use BZNSYP's phone label as the ground truth and we delete silence tokens in labels and predicted phones.
+
+You should Download BZNSYP from it's [Official Website](https://test.data-baker.com/data/index/source) and extract it. Assume the path to the dataset is `~/datasets/BZNSYP`.
+
+We use `WER` as evaluation criterion.
+## Text Normalization
+For text normalization, the test data is  `data/textnorm_test_cases.txt`, we use `|` as the separator of raw_data and normed_data.
+
+We use `CER` as evaluation criterion.
+## Start
+Run the command below to get the results of test.
+```bash
+./run.sh
+```
+The `avg WER` of g2p is: 0.02785753389811866
+
+The `avg CER` of text normalization is: 0.014229233983486172

examples/text_frontend/data/textnorm_test_cases.txt

@@ -0,0 +1,123 @@
+今天的最低气温达到-10°C.|今天的最低气温达到零下十度.
+只要有33/4的人同意，就可以通过决议。|只要有四分之三十三的人同意，就可以通过决议。
+1945年5月2日，苏联士兵在德国国会大厦上升起了胜利旗，象征着攻占柏林并战胜了纳粹德国。|一九四五年五月二日，苏联士兵在德国国会大厦上升起了胜利旗，象征着攻占柏林并战胜了纳粹德国。
+4月16日，清晨的战斗以炮击揭幕，数以千计的大炮和喀秋莎火箭炮开始炮轰德军阵地，炮击持续了数天之久。|四月十六日，清晨的战斗以炮击揭幕，数以千计的大炮和喀秋莎火箭炮开始炮轰德军阵地，炮击持续了数天之久。
+如果剩下的30.6%是过去，那么还有69.4%.|如果剩下的百分之三十点六是过去，那么还有百分之六十九点四.
+事情发生在2020/03/31的上午8:00.|事情发生在二零二零年三月三十一日的上午八点.
+警方正在找一支.22口径的手枪。|警方正在找一支点二二口径的手枪。
+欢迎致电中国联通，北京2022年冬奥会官方合作伙伴为您服务|欢迎致电中国联通，北京二零二二年冬奥会官方合作伙伴为您服务
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+快速解除流量封顶请按星号键，腾讯王卡产品介绍、使用说明、特权及活动请按9，查询话费、套餐余量、积分及活动返款请按1，手机上网流量开通及取消请按2，查询本机号码及本号所使用套餐请按4，密码修改及重置请按5，紧急开机请按6，挂失请按7，查询充值记录请按8，其它自助服务及人工服务请按0|快速解除流量封顶请按星号键，腾讯王卡产品介绍、使用说明、特权及活动请按九，查询话费、套餐余量、积分及活动返款请按一，手机上网流量开通及取消请按二，查询本机号码及本号所使用套餐请按四，密码修改及重置请按五，紧急开机请按六，挂失请按七，查询充值记录请按八，其它自助服务及人工服务请按零
+智能客服助理快速查话费、查流量请按9，了解北京联通业务请按1，宽带IPTV新装、查询请按2，障碍报修请按3，充值缴费请按4，投诉建议请按5，政企业务请按7，人工服务请按0，for english severice press star key|智能客服助理快速查话费、查流量请按九，了解北京联通业务请按一，宽带IPTV新装、查询请按二，障碍报修请按三，充值缴费请按四，投诉建议请按五，政企业务请按七，人工服务请按零，for english severice press star key
+您的帐户当前可用余额为63.89元，本月消费为2.17元。您的消费、套餐余量和其它信息将以短信形式下发，请您注意查收。谢谢使用，再见！。|您的帐户当前可用余额为六十三点八九元，本月消费为二点一七元。您的消费、套餐余量和其它信息将以短信形式下发，请您注意查收。谢谢使用，再见！。
+您的帐户当前可用余额为负15.5元，本月消费为59.6元。您的消费、套餐余量和其它信息将以短信形式下发，请您注意查收。谢谢使用，再见！。|您的帐户当前可用余额为负十五点五元，本月消费为五十九点六元。您的消费、套餐余量和其它信息将以短信形式下发，请您注意查收。谢谢使用，再见！。
+尊敬的客户，您目前的话费余额为负14.60元，已低于10元，为保证您的通信畅通，请及时缴纳费用。|尊敬的客户，您目前的话费余额为负十四点六元，已低于十元，为保证您的通信畅通，请及时缴纳费用。
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+您的账户当前可用余额为负36.00元，本月消费36.00元。|您的账户当前可用余额为负三十六元，本月消费三十六元。
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+除此之外，摄像头方面再次升级，增加了前摄全新超广角摄像头，支持人物居中功能，搭配超广角可实现视频中始终让人物居中效果。|除此之外，摄像头方面再次升级，增加了前摄全新超广角摄像头，支持人物居中功能，搭配超广角可实现视频中始终让人物居中效果。
+屏幕方面，iPad Pro 12.9版本支持XDR体验的Mini-LEDS显示屏，支持HDR10、杜比视界，还支持杜比全景声。|屏幕方面，iPad Pro 十二点九版本支持XDR体验的Mini-LEDS显示屏，支持HDR十、杜比视界，还支持杜比全景声。
+iPad Pro的秒控键盘这次也推出白色版本。|iPad Pro的秒控键盘这次也推出白色版本。
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+她出生于86年8月18日，她弟弟出生于1995年3月1日|她出生于八六年八月十八日，她弟弟出生于一九九五年三月一日
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+随便来几个价格12块5，34.5元，20.1万|随便来几个价格十二块五，三十四点五元，二十点一万
+明天有62%的概率降雨|明天有百分之六十二的概率降雨
+这是固话0421-33441122|这是固话零四二一三三四四一一二二
+这是手机+86 18544139121|这是手机八六一八五四四一三九一二一
+小王的身高是153.5cm,梦想是打篮球!我觉得有0.1%的可能性。|小王的身高是一百五十三点五cm,梦想是打篮球!我觉得有百分之零点一的可能性。
+不管三七二十一|不管三七二十一
+九九八十一难|九九八十一难
+2018年5月23号上午10点10分|二零一八年五月二十三号上午十点十分
+10076|一零零七六
+32.68%|百分之三十二点六八
+比分测试17:16|比分测试十七比十六
+比分测试37:16|比分测试三十七比十六
+1.1|一点一
+一点一滴|一点一滴
+八九十|八九十
+1个人一定要|一个人一定要
+10000棵树|一万棵树
+1234个人|一千二百三十四个人
+35553座楼|三万五千五百五十三座楼
+15873690|一五八七三六九零
+27930122|二七九三零一二二
+85307499|八五三零七四九九
+26149787|二六一四九七八七
+15964862|一五九六四八六二
+45698723|四五六九八七二三
+48615964|四八六一五九六四
+17864589|一七八六四五八九
+123加456|一百二十三加四百五十六
+9786加3384|九千七百八十六加三千三百八十四
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+深圳每月平均工资在13000元|深圳每月平均工资在一万三千元
+每月房租要交1500元|每月房租要交一千五百元
+我每月交通费用在400元左右|我每月交通费用在四百元左右
+本月开销费用是51328元|本月开销费用是五万一千三百二十八元
+如果你中了五千万元奖金会分我一半吗|如果你中了五千万元奖金会分我一半吗
+这个月工资我发了3529元|这个月工资我发了三千五百二十九元
+学会了这个技能你至少可以涨薪5000元|学会了这个技能你至少可以涨薪五千元
+我们的会议时间定在9点25分开始|我们的会议时间定在九点二十五分开始
+上课时间是8点15分请不要迟到|上课时间是八点十五分请不要迟到
+昨天你9点21分才到教室|昨天你九点二十一分才到教室
+今天是2019年1月31号|今天是二零一九年一月三十一号
+今年的除夕夜是2019年2月4号|今年的除夕夜是二零一九年二月四号
+这根水管的长度不超过35米|这根水管的长度不超过三十五米
+400米是最短的长跑距离|四百米是最短的长跑距离
+最高的撑杆跳为11米|最高的撑杆跳为十一米
+等会请在12:05请通知我|等会请在十二点零五分请通知我
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+你生日那天我会送你999朵玫瑰|你生日那天我会送你九百九十九朵玫瑰
+给我1双鞋我可以跳96米远|给我一双鞋我可以跳九十六米远
+虽然我们的身高相差356毫米也不影响我们交往|虽然我们的身高相差三百五十六毫米也不影响我们交往
+我们班的最高总分为583分|我们班的最高总分为五百八十三分
+今天考试老师多扣了我21分|今天考试老师多扣了我二十一分
+我量过这张桌子总长为1.37米|我量过这张桌子总长为一点三七米
+乘务员身高必须超过185公分|乘务员身高必须超过一百八十五公分
+这台电脑分辨率为1024|这台电脑分辨率为一零二四
+手机价格不超过1500元|手机价格不超过一千五百元
+101.23|一百零一点二三
+123.116|一百二十三点一一六
+456.147|四百五十六点一四七
+0.1594|零点一五九四
+3.1415|三点一四一五
+0.112233|零点一一二二三三
+0.1|零点一
+40001.987|四万零一点九八七
+56.878|五十六点八七八
+0.00123|零点零零一二三
+0.0001|零点零零零一
+0.92015|零点九二零一五
+999.0001|九百九十九点零零零一
+10000.123|一万点一二三
+666.555|六百六十六点五五五
+444.789|四百四十四点七八九
+789.666|七百八十九点六六六
+0.12345|零点一二三四五
+1.05649|一点零五六四九
+环比上调1.86%|环比上调百分之一点八六
+环比分别下跌3.46%及微涨0.70%|环比分别下跌百分之三点四六及微涨百分之零点七
+单价在30000元的二手房购房个案当中|单价在三万元的二手房购房个案当中
+6月仍有7%单价在30000元的房源|六月仍有百分之七单价在三万元的房源
+最终也只是以总积分1分之差屈居第2|最终也只是以总积分一分之差屈居第二
+中新网8月29日电今日|中新网八月二十九日电今日
+自6月底呼和浩特市率先宣布取消限购后|自六月底呼和浩特市率先宣布取消限购后
+仅1个多月的时间里|仅一个多月的时间里
+除了北京上海广州深圳4个一线城市和三亚之外|除了北京上海广州深圳四个一线城市和三亚之外
+46个限购城市当中|四十六个限购城市当中
+41个已正式取消或变相放松了限购|四十一个已正式取消或变相放松了限购
+其中包括对拥有一套住房并已结清相应购房贷款的家庭|其中包括对拥有一套住房并已结清相应购房贷款的家庭
+这个后来被称为930新政策的措施|这个后来被称为九三零新政策的措施
+今年有望超三百亿美元|今年有望超三百亿美元
+就连一向看多的任志强|就连一向看多的任志强
+近期也一反常态地发表看空言论|近期也一反常态地发表看空言论
+985|九八五

examples/text_frontend/run.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+# test g2p
+echo "Start test g2p."
+python3 test_g2p.py --root-dir=~/datasets/BZNSYP
+# test text normalization
+echo "Start test text normalization."
+python3 test_textnorm.py --test-file=data/textnorm_test_cases.txt

examples/text_frontend/test_g2p.py

@@ -0,0 +1,110 @@
+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import argparse
+import re
+from collections import defaultdict
+from pathlib import Path
+
+from parakeet.frontend.cn_frontend import Frontend as cnFrontend
+from parakeet.utils.error_rate import wer
+from praatio import tgio
+
+
+def text_cleaner(raw_text):
+    text = re.sub('#[1-4]|“|”|（|）', '', raw_text)
+    text = text.replace("…。", "。")
+    text = re.sub('：|；|——|……|、|…|—', '，', text)
+    return text
+
+
+def get_baker_data(root_dir):
+    alignment_files = sorted(
+        list((root_dir / "PhoneLabeling").rglob("*.interval")))
+    text_file = root_dir / "ProsodyLabeling/000001-010000.txt"
+    text_file = Path(text_file).expanduser()
+    data_dict = defaultdict(dict)
+    # filter out several files that have errors in annotation
+    exclude = {'000611', '000662', '002365', '005107'}
+    alignment_files = [f for f in alignment_files if f.stem not in exclude]
+    # biaobei 前后有 sil ，中间没有 sp
+    data_dict = defaultdict(dict)
+    for alignment_fp in alignment_files:
+        alignment = tgio.openTextgrid(alignment_fp)
+        # only with baker's annotation
+        utt_id = alignment.tierNameList[0].split(".")[0]
+        intervals = alignment.tierDict[alignment.tierNameList[0]].entryList
+        phones = []
+        for interval in intervals:
+            label = interval.label
+            # Baker has sp1 rather than sp
+            label = label.replace("sp1", "sp")
+            phones.append(label)
+        data_dict[utt_id]["phones"] = phones
+    for line in open(text_file, "r"):
+        if line.startswith("0"):
+            utt_id, raw_text = line.strip().split()
+            text = text_cleaner(raw_text)
+            if utt_id in data_dict:
+                data_dict[utt_id]['text'] = text
+        else:
+            pinyin = line.strip().split()
+            if utt_id in data_dict:
+                data_dict[utt_id]['pinyin'] = pinyin
+    return data_dict
+
+
+def get_g2p_phones(data_dict, frontend):
+    for utt_id in data_dict:
+        g2p_phones = frontend.get_phonemes(data_dict[utt_id]['text'])
+        data_dict[utt_id]["g2p_phones"] = g2p_phones
+    return data_dict
+
+
+def get_avg_wer(data_dict):
+    wer_list = []
+    for utt_id in data_dict:
+        g2p_phones = data_dict[utt_id]['g2p_phones']
+        # delete silence tokens in predicted phones
+        g2p_phones = [phn for phn in g2p_phones if phn not in {"sp", "sil"}]
+        gt_phones = data_dict[utt_id]['phones']
+        # delete silence tokens in baker phones
+        gt_phones = [phn for phn in gt_phones if phn not in {"sp", "sil"}]
+        gt_phones = " ".join(gt_phones)
+        g2p_phones = " ".join(g2p_phones)
+        single_wer = wer(gt_phones, g2p_phones)
+        wer_list.append(single_wer)
+    return sum(wer_list) / len(wer_list)
+
+
+def main():
+    parser = argparse.ArgumentParser(description="g2p example.")
+    parser.add_argument(
+        "--root-dir",
+        default=None,
+        type=str,
+        help="directory to baker dataset.")
+
+    args = parser.parse_args()
+    root_dir = Path(args.root_dir).expanduser()
+    assert root_dir.is_dir()
+    frontend = cnFrontend()
+    data_dict = get_baker_data(root_dir)
+    data_dict = get_g2p_phones(data_dict, frontend)
+    avg_wer = get_avg_wer(data_dict)
+    print("The avg WER of g2p is:", avg_wer)
+
+
+if __name__ == "__main__":
+    main()

examples/text_frontend/test_textnorm.py

@@ -0,0 +1,61 @@
+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import argparse
+import re
+from pathlib import Path
+
+from parakeet.frontend.cn_normalization.text_normlization import TextNormalizer
+from parakeet.utils.error_rate import cer
+
+
+# delete english characters
+# e.g. "你好aBC" -> "你 好"
+def del_en_add_space(input: str):
+    output = re.sub('[a-zA-Z]', '', input)
+    output = [char + " " for char in output]
+    output = "".join(output).strip()
+    return output
+
+
+def get_avg_cer(test_file, text_normalizer):
+    cer_list = []
+    for line in open(test_file, "r"):
+        line = line.strip()
+        raw_text, gt_text = line.split("|")
+        textnorm_text = text_normalizer.normalize_sentence(raw_text)
+        gt_text = del_en_add_space(gt_text)
+        textnorm_text = del_en_add_space(textnorm_text)
+        single_cer = cer(gt_text, textnorm_text)
+        cer_list.append(single_cer)
+    return sum(cer_list) / len(cer_list)
+
+
+def main():
+    parser = argparse.ArgumentParser(description="text normalization example.")
+    parser.add_argument(
+        "--test-file",
+        default=None,
+        type=str,
+        help="path of text normalization test file.")
+
+    args = parser.parse_args()
+    test_file = Path(args.test_file).expanduser()
+    text_normalizer = TextNormalizer()
+    avg_cer = get_avg_cer(test_file, text_normalizer)
+    print("The avg CER of text normalization is:", avg_cer)
+
+
+if __name__ == "__main__":
+    main()

parakeet/frontend/cn_frontend.py

@@ -35,6 +35,14 @@ class Frontend():
             self.g2pM_model = G2pM()
             self.pinyin2phone = generate_lexicon(
                 with_tone=True, with_erhua=False)
+        self.must_erhua = {"小院儿", "胡同儿", "范儿", "老汉儿", "撒欢儿", "寻老礼儿", "妥妥儿"}
+        self.not_erhua = {
+            "虐儿", "为儿", "护儿", "瞒儿", "救儿", "替儿", "有儿", "一儿", "我儿", "俺儿", "妻儿",
+            "拐儿", "聋儿", "乞儿", "患儿", "幼儿", "孤儿", "婴儿", "婴幼儿", "连体儿", "脑瘫儿",
+            "流浪儿", "体弱儿", "混血儿", "蜜雪儿", "舫儿", "祖儿", "美儿", "应采儿", "可儿", "侄儿",
+            "孙儿", "侄孙儿", "女儿", "男儿", "红孩儿", "花儿", "虫儿", "马儿", "鸟儿", "猪儿", "猫儿",
+            "狗儿"
+        }
 
     def _get_initials_finals(self, word):
         initials = []
@@ -71,26 +79,31 @@ class Frontend():
         return initials, finals
 
     # if merge_sentences, merge all sentences into one phone sequence
-    def _g2p(self, sentences, merge_sentences=True):
+    def _g2p(self, sentences, merge_sentences=True, with_erhua=True):
         segments = sentences
         phones_list = []
         for seg in segments:
             phones = []
-            seg = psg.lcut(seg)
+            seg_cut = psg.lcut(seg)
             initials = []
             finals = []
-            seg = self.tone_modifier.pre_merge_for_modify(seg)
+            seg_cut = self.tone_modifier.pre_merge_for_modify(seg_cut)
-            for word, pos in seg:
+            for word, pos in seg_cut:
                 if pos == 'eng':
                     continue
                 sub_initials, sub_finals = self._get_initials_finals(word)
+
                 sub_finals = self.tone_modifier.modified_tone(word, pos,
                                                               sub_finals)
+                if with_erhua:
+                    sub_initials, sub_finals = self._merge_erhua(
+                        sub_initials, sub_finals, word, pos)
                 initials.append(sub_initials)
                 finals.append(sub_finals)
                 # assert len(sub_initials) == len(sub_finals) == len(word)
             initials = sum(initials, [])
             finals = sum(finals, [])
+
             for c, v in zip(initials, finals):
                 # NOTE: post process for pypinyin outputs
                 # we discriminate i, ii and iii
@@ -106,7 +119,24 @@ class Frontend():
             phones_list = sum(phones_list, [])
         return phones_list
 
-    def get_phonemes(self, sentence):
+    def _merge_erhua(self, initials, finals, word, pos):
+        if word not in self.must_erhua and (word in self.not_erhua or
+                                            pos in {"a", "j", "nr"}):
+            return initials, finals
+        new_initials = []
+        new_finals = []
+        assert len(finals) == len(word)
+        for i, phn in enumerate(finals):
+            if i == len(finals) - 1 and word[i] == "儿" and phn in {
+                    "er2", "er5"
+            } and word[-2:] not in self.not_erhua and new_finals:
+                new_finals[-1] = new_finals[-1][:-1] + "r" + new_finals[-1][-1]
+            else:
+                new_finals.append(phn)
+                new_initials.append(initials[i])
+        return new_initials, new_finals
+
+    def get_phonemes(self, sentence, with_erhua=True):
         sentences = self.text_normalizer.normalize(sentence)
-        phonemes = self._g2p(sentences)
+        phonemes = self._g2p(sentences, with_erhua=with_erhua)
         return phonemes

parakeet/frontend/cn_normalization/num.py

@@ -29,6 +29,8 @@ UNITS = OrderedDict({
     8: '亿',
 })
 
+COM_QUANTIFIERS = '(匹|张|座|回|场|尾|条|个|首|阙|阵|网|炮|顶|丘|棵|只|支|袭|辆|挑|担|颗|壳|窠|曲|墙|群|腔|砣|座|客|贯|扎|捆|刀|令|打|手|罗|坡|山|岭|江|溪|钟|队|单|双|对|出|口|头|脚|板|跳|枝|件|贴|针|线|管|名|位|身|堂|课|本|页|家|户|层|丝|毫|厘|分|钱|两|斤|担|铢|石|钧|锱|忽|(千|毫|微)克|毫|厘|分|寸|尺|丈|里|寻|常|铺|程|(千|分|厘|毫|微)米|撮|勺|合|升|斗|石|盘|碗|碟|叠|桶|笼|盆|盒|杯|钟|斛|锅|簋|篮|盘|桶|罐|瓶|壶|卮|盏|箩|箱|煲|啖|袋|钵|年|月|日|季|刻|时|周|天|秒|分|旬|纪|岁|世|更|夜|春|夏|秋|冬|代|伏|辈|丸|泡|粒|颗|幢|堆|条|根|支|道|面|片|张|颗|块|元|(亿|千万|百万|万|千|百)|(亿|千万|百万|万|千|百|美|)元|(亿|千万|百万|万|千|百|)块|角|毛|分)'
+
 # 分数表达式
 RE_FRAC = re.compile(r'(-?)(\d+)/(\d+)')
 
@@ -59,7 +61,17 @@ def replace_percentage(match: re.Match) -> str:
 
 # 整数表达式
 # 带负号或者不带负号的整数 12, -10
-RE_INTEGER = re.compile(r'(-?)' r'(\d+)')
+RE_INTEGER = re.compile(r'(-)' r'(\d+)')
+
+
+def replace_negative_num(match: re.Match) -> str:
+    sign = match.group(1)
+    number = match.group(2)
+    sign: str = "负" if sign else ""
+    number: str = num2str(number)
+    result = f"{sign}{number}"
+    return result
+
 
 # 编号-无符号整形
 # 00078
@@ -72,12 +84,23 @@ def replace_default_num(match: re.Match):
 
 
 # 数字表达式
-# 1. 整数: -10, 10;
+# 纯小数
-# 2. 浮点数: 10.2, -0.3
+RE_DECIMAL_NUM = re.compile(r'(-?)((\d+)(\.\d+))' r'|(\.(\d+))')
-# 3. 不带符号和整数部分的纯浮点数: .22, .38   
+# 正整数 + 量词
+RE_POSITIVE_QUANTIFIERS = re.compile(r"(\d+)([多余几])?" + COM_QUANTIFIERS)
 RE_NUMBER = re.compile(r'(-?)((\d+)(\.\d+)?)' r'|(\.(\d+))')
 
 
+def replace_positive_quantifier(match: re.Match) -> str:
+    number = match.group(1)
+    match_2 = match.group(2)
+    match_2: str = match_2 if match_2 else ""
+    quantifiers: str = match.group(3)
+    number: str = num2str(number)
+    result = f"{number}{match_2}{quantifiers}"
+    return result
+
+
 def replace_number(match: re.Match) -> str:
     sign = match.group(1)
     number = match.group(2)
@@ -93,7 +116,7 @@ def replace_number(match: re.Match) -> str:
 
 # 范围表达式
 # 12-23, 12~23
-RE_RANGE = re.compile(r'(\d+)[-~](\d+)')
+RE_RANGE = re.compile(r'(\d+)[~](\d+)')
 
 
 def replace_range(match: re.Match) -> str:

parakeet/frontend/cn_normalization/phonecode.py

@@ -25,7 +25,7 @@ from .num import verbalize_digit
 RE_MOBILE_PHONE = re.compile(
     r"(?<!\d)((\+?86 ?)?1([38]\d|5[0-35-9]|7[678]|9[89])\d{8})(?!\d)")
 RE_TELEPHONE = re.compile(
-    r"(?<!\d)((0(10|2[1-3]|[3-9]\d{2})-?)?[1-9]\d{6,7})(?!\d)")
+    r"(?<!\d)((0(10|2[1-3]|[3-9]\d{2})-?)?[1-9]\d{7,8})(?!\d)")
 
 
 def phone2str(phone_string: str, mobile=True) -> str:
@@ -44,4 +44,8 @@ def phone2str(phone_string: str, mobile=True) -> str:
 
 
 def replace_phone(match: re.Match) -> str:
+    return phone2str(match.group(0), mobile=False)
+
+
+def replace_mobile(match: re.Match) -> str:
     return phone2str(match.group(0))

parakeet/frontend/cn_normalization/text_normlization.py

@@ -12,16 +12,15 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import opencc
 import re
 from typing import List
 
 from .chronology import RE_TIME, RE_DATE, RE_DATE2
 from .chronology import replace_time, replace_date, replace_date2
 from .constants import F2H_ASCII_LETTERS, F2H_DIGITS, F2H_SPACE
-from .num import RE_NUMBER, RE_FRAC, RE_PERCENTAGE, RE_RANGE, RE_INTEGER, RE_DEFAULT_NUM
+from .num import RE_NUMBER, RE_FRAC, RE_PERCENTAGE, RE_RANGE, RE_INTEGER, RE_DEFAULT_NUM, RE_DECIMAL_NUM, RE_POSITIVE_QUANTIFIERS
-from .num import replace_number, replace_frac, replace_percentage, replace_range, replace_default_num
+from .num import replace_number, replace_frac, replace_percentage, replace_range, replace_default_num, replace_negative_num, replace_positive_quantifier
-from .phonecode import RE_MOBILE_PHONE, RE_TELEPHONE, replace_phone
+from .phonecode import RE_MOBILE_PHONE, RE_TELEPHONE, replace_phone, replace_mobile
 from .quantifier import RE_TEMPERATURE
 from .quantifier import replace_temperature
 
@@ -29,8 +28,6 @@ from .quantifier import replace_temperature
 class TextNormalizer():
     def __init__(self):
         self.SENTENCE_SPLITOR = re.compile(r'([：，；。？！,;?!][”’]?)')
-        self._t2s_converter = opencc.OpenCC("t2s.json")
-        self._s2t_converter = opencc.OpenCC('s2t.json')
 
     def _split(self, text: str) -> List[str]:
         """Split long text into sentences with sentence-splitting punctuations.
@@ -48,15 +45,8 @@ class TextNormalizer():
         sentences = [sentence.strip() for sentence in re.split(r'\n+', text)]
         return sentences
 
-    def _tranditional_to_simplified(self, text: str) -> str:
-        return self._t2s_converter.convert(text)
-
-    def _simplified_to_traditional(self, text: str) -> str:
-        return self._s2t_converter.convert(text)
-
     def normalize_sentence(self, sentence):
         # basic character conversions
-        sentence = self._tranditional_to_simplified(sentence)
         sentence = sentence.translate(F2H_ASCII_LETTERS).translate(
             F2H_DIGITS).translate(F2H_SPACE)
 
@@ -68,8 +58,12 @@ class TextNormalizer():
         sentence = RE_RANGE.sub(replace_range, sentence)
         sentence = RE_FRAC.sub(replace_frac, sentence)
         sentence = RE_PERCENTAGE.sub(replace_percentage, sentence)
-        sentence = RE_MOBILE_PHONE.sub(replace_phone, sentence)
+        sentence = RE_MOBILE_PHONE.sub(replace_mobile, sentence)
         sentence = RE_TELEPHONE.sub(replace_phone, sentence)
+        sentence = RE_INTEGER.sub(replace_negative_num, sentence)
+        sentence = RE_DECIMAL_NUM.sub(replace_number, sentence)
+        sentence = RE_POSITIVE_QUANTIFIERS.sub(replace_positive_quantifier,
+                                               sentence)
         sentence = RE_DEFAULT_NUM.sub(replace_default_num, sentence)
         sentence = RE_NUMBER.sub(replace_number, sentence)
 

parakeet/frontend/tone_sandhi.py

@@ -56,7 +56,14 @@ class ToneSandhi():
             '凑合', '凉快', '冷战', '冤枉', '冒失', '养活', '关系', '先生', '兄弟', '便宜', '使唤',
             '佩服', '作坊', '体面', '位置', '似的', '伙计', '休息', '什么', '人家', '亲戚', '亲家',
             '交情', '云彩', '事情', '买卖', '主意', '丫头', '丧气', '两口', '东西', '东家', '世故',
-            '不由', '不在', '下水', '下巴', '上头', '上司', '丈夫', '丈人', '一辈', '那个'
+            '不由', '不在', '下水', '下巴', '上头', '上司', '丈夫', '丈人', '一辈', '那个', '菩萨',
+            '父亲', '母亲', '咕噜', '邋遢', '费用', '冤家', '甜头', '介绍', '荒唐', '大人', '泥鳅',
+            '幸福', '熟悉', '计划', '扑腾', '蜡烛', '姥爷', '照顾', '喉咙', '吉他', '弄堂', '蚂蚱',
+            '凤凰', '拖沓', '寒碜', '糟蹋', '倒腾', '报复', '逻辑', '盘缠', '喽啰', '牢骚', '咖喱',
+            '扫把', '惦记'
+        }
+        self.must_not_neural_tone_words = {
+            "男子", "女子", "分子", "原子", "量子", "莲子", "石子", "瓜子", "电子"
         }
 
     # the meaning of jieba pos tag: https://blog.csdn.net/weixin_44174352/article/details/113731041
@@ -66,71 +73,90 @@ class ToneSandhi():
     # finals: ['ia1', 'i3']
     def _neural_sandhi(self, word: str, pos: str,
                        finals: List[str]) -> List[str]:
+
+        # reduplication words for n. and v. e.g. 奶奶, 试试, 旺旺
+        for j, item in enumerate(word):
+            if j - 1 >= 0 and item == word[j - 1] and pos[
+                    0] in {"n", "v", "a"}:
+                finals[j] = finals[j][:-1] + "5"
         ge_idx = word.find("个")
-        if len(word) == 1 and word in "吧呢啊嘛" and pos == 'y':
+        if len(word) >= 1 and word[-1] in "吧呢哈啊呐噻嘛吖嗨呐哦哒额滴哩哟喽啰耶喔诶":
             finals[-1] = finals[-1][:-1] + "5"
-        elif len(word) == 1 and word in "的地得" and pos in {"ud", "uj", "uv"}:
+        elif len(word) >= 1 and word[-1] in "的地得":
             finals[-1] = finals[-1][:-1] + "5"
         # e.g. 走了, 看着, 去过
         elif len(word) == 1 and word in "了着过" and pos in {"ul", "uz", "ug"}:
             finals[-1] = finals[-1][:-1] + "5"
-        elif len(word) > 1 and word[-1] in "们子" and pos in {"r", "n"}:
+        elif len(word) > 1 and word[-1] in "们子" and pos in {
+                "r", "n"
+        } and word not in self.must_not_neural_tone_words:
             finals[-1] = finals[-1][:-1] + "5"
         # e.g. 桌上, 地下, 家里
         elif len(word) > 1 and word[-1] in "上下里" and pos in {"s", "l", "f"}:
             finals[-1] = finals[-1][:-1] + "5"
         # e.g. 上来, 下去
-        elif len(word) > 1 and word[-1] in "来去" and pos[0] in {"v"}:
+        elif len(word) > 1 and word[-1] in "来去" and word[-2] in "上下进出回过起开":
             finals[-1] = finals[-1][:-1] + "5"
         # 个做量词
-        elif ge_idx >= 1 and word[ge_idx - 1].isnumeric():
+        elif (ge_idx >= 1 and
+              (word[ge_idx - 1].isnumeric() or
+               word[ge_idx - 1] in "几有两半多各整每做是")) or word == '个':
             finals[ge_idx] = finals[ge_idx][:-1] + "5"
-        # reduplication words for n. and v. e.g. 奶奶, 试试
+        else:
-        elif len(word) >= 2 and word[-1] == word[-2] and pos[0] in {"n", "v"}:
+            if word in self.must_neural_tone_words or word[
-            finals[-1] = finals[-1][:-1] + "5"
-        # conventional tone5 in Chinese
-        elif word in self.must_neural_tone_words or word[
                     -2:] in self.must_neural_tone_words:
                 finals[-1] = finals[-1][:-1] + "5"
 
+        word_list = self._split_word(word)
+        finals_list = [finals[:len(word_list[0])], finals[len(word_list[0]):]]
+        for i, word in enumerate(word_list):
+            # conventional neural in Chinese
+            if word in self.must_neural_tone_words or word[
+                    -2:] in self.must_neural_tone_words:
+                finals_list[i][-1] = finals_list[i][-1][:-1] + "5"
+        finals = sum(finals_list, [])
+
         return finals
 
     def _bu_sandhi(self, word: str, finals: List[str]) -> List[str]:
-        # "不" before tone4 should be bu2, e.g. 不怕
-        if len(word) > 1 and word[0] == "不" and finals[1][-1] == "4":
-            finals[0] = finals[0][:-1] + "2"
         # e.g. 看不懂
-        elif len(word) == 3 and word[1] == "不":
+        if len(word) == 3 and word[1] == "不":
             finals[1] = finals[1][:-1] + "5"
-
+        else:
+            for i, char in enumerate(word):
+                # "不" before tone4 should be bu2, e.g. 不怕
+                if char == "不" and i + 1 < len(word) and finals[i + 1][
+                        -1] == "4":
+                    finals[i] = finals[i][:-1] + "2"
         return finals
 
     def _yi_sandhi(self, word: str, finals: List[str]) -> List[str]:
-        # "一" in number sequences, e.g. 一零零
+        # "一" in number sequences, e.g. 一零零, 二一零
-        if len(word) > 1 and word[0] == "一" and all(
+        if word.find("一") != -1 and all(
-            [item.isnumeric() for item in word]):
+            [item.isnumeric() for item in word if item != "一"]):
             return finals
-        # "一" before tone4 should be yi2, e.g. 一段
-        elif len(word) > 1 and word[0] == "一" and finals[1][-1] == "4":
-            finals[0] = finals[0][:-1] + "2"
-        # "一" before non-tone4 should be yi4, e.g. 一天
-        elif len(word) > 1 and word[0] == "一" and finals[1][-1] != "4":
-            finals[0] = finals[0][:-1] + "4"
         # "一" between reduplication words shold be yi5, e.g. 看一看
         elif len(word) == 3 and word[1] == "一" and word[0] == word[-1]:
             finals[1] = finals[1][:-1] + "5"
         # when "一" is ordinal word, it should be yi1
         elif word.startswith("第一"):
             finals[1] = finals[1][:-1] + "1"
+        else:
+            for i, char in enumerate(word):
+                if char == "一" and i + 1 < len(word):
+                    # "一" before tone4 should be yi2, e.g. 一段
+                    if finals[i + 1][-1] == "4":
+                        finals[i] = finals[i][:-1] + "2"
+                    # "一" before non-tone4 should be yi4, e.g. 一天
+                    else:
+                        finals[i] = finals[i][:-1] + "4"
         return finals
 
-    def _three_sandhi(self, word: str, finals: List[str]) -> List[str]:
+    def _split_word(self, word):
-        if len(word) == 2 and self._all_tone_three(finals):
-            finals[0] = finals[0][:-1] + "2"
-        elif len(word) == 3:
         word_list = jieba.cut_for_search(word)
         word_list = sorted(word_list, key=lambda i: len(i), reverse=False)
         new_word_list = []
+
         first_subword = word_list[0]
         first_begin_idx = word.find(first_subword)
         if first_begin_idx == 0:
@@ -138,20 +164,25 @@ class ToneSandhi():
             new_word_list = [first_subword, second_subword]
         else:
             second_subword = word[:-len(first_subword)]
-
             new_word_list = [second_subword, first_subword]
+        return new_word_list
+
+    def _three_sandhi(self, word: str, finals: List[str]) -> List[str]:
+        if len(word) == 2 and self._all_tone_three(finals):
+            finals[0] = finals[0][:-1] + "2"
+        elif len(word) == 3:
+            word_list = self._split_word(word)
             if self._all_tone_three(finals):
                 #  disyllabic + monosyllabic, e.g. 蒙古/包
-                if len(new_word_list[0]) == 2:
+                if len(word_list[0]) == 2:
                     finals[0] = finals[0][:-1] + "2"
                     finals[1] = finals[1][:-1] + "2"
                 #  monosyllabic + disyllabic, e.g. 纸/老虎
-                elif len(new_word_list[0]) == 1:
+                elif len(word_list[0]) == 1:
                     finals[1] = finals[1][:-1] + "2"
             else:
                 finals_list = [
-                    finals[:len(new_word_list[0])],
+                    finals[:len(word_list[0])], finals[len(word_list[0]):]
-                    finals[len(new_word_list[0]):]
                 ]
                 if len(finals_list) == 2:
                     for i, sub in enumerate(finals_list):
@@ -192,8 +223,7 @@ class ToneSandhi():
         if last_word == "不":
             new_seg.append((last_word, 'd'))
             last_word = ""
-        seg = new_seg
+        return new_seg
-        return seg
 
     # function 1: merge "一" and reduplication words in it's left and right, e.g. "听","一","听" ->"听一听"
     # function 2: merge single  "一" and the word behind it
@@ -222,9 +252,9 @@ class ToneSandhi():
                 new_seg[-1][0] = new_seg[-1][0] + word
             else:
                 new_seg.append([word, pos])
-        seg = new_seg
+        return new_seg
-        return seg
 
+    # the first and the second words are all_tone_three
     def _merge_continuous_three_tones(
             self, seg: List[Tuple[str, str]]) -> List[Tuple[str, str]]:
         new_seg = []
@@ -239,21 +269,73 @@ class ToneSandhi():
             if i - 1 >= 0 and self._all_tone_three(sub_finals_list[
                     i - 1]) and self._all_tone_three(sub_finals_list[
                         i]) and not merge_last[i - 1]:
-                if len(seg[i - 1][0]) + len(seg[i][0]) <= 3:
+                # if the last word is reduplication, not merge, because reduplication need to be _neural_sandhi
+                if not self._is_reduplication(seg[i - 1][0]) and len(seg[
+                        i - 1][0]) + len(seg[i][0]) <= 3:
                     new_seg[-1][0] = new_seg[-1][0] + seg[i][0]
                     merge_last[i] = True
                 else:
                     new_seg.append([word, pos])
             else:
                 new_seg.append([word, pos])
-        seg = new_seg
+
-        return seg
+        return new_seg
+
+    def _is_reduplication(self, word):
+        return len(word) == 2 and word[0] == word[1]
+
+    # the last char of first word and the first char of second word is tone_three
+    def _merge_continuous_three_tones_2(
+            self, seg: List[Tuple[str, str]]) -> List[Tuple[str, str]]:
+        new_seg = []
+        sub_finals_list = [
+            lazy_pinyin(
+                word, neutral_tone_with_five=True, style=Style.FINALS_TONE3)
+            for (word, pos) in seg
+        ]
+        assert len(sub_finals_list) == len(seg)
+        merge_last = [False] * len(seg)
+        for i, (word, pos) in enumerate(seg):
+            if i - 1 >= 0 and sub_finals_list[i - 1][-1][-1] == "3" and sub_finals_list[i][0][-1] == "3" and not \
+                    merge_last[i - 1]:
+                # if the last word is reduplication, not merge, because reduplication need to be _neural_sandhi
+                if not self._is_reduplication(seg[i - 1][0]) and len(seg[
+                        i - 1][0]) + len(seg[i][0]) <= 3:
+                    new_seg[-1][0] = new_seg[-1][0] + seg[i][0]
+                    merge_last[i] = True
+                else:
+                    new_seg.append([word, pos])
+            else:
+                new_seg.append([word, pos])
+        return new_seg
+
+    def _merge_er(self, seg: List[Tuple[str, str]]) -> List[Tuple[str, str]]:
+        new_seg = []
+        for i, (word, pos) in enumerate(seg):
+            if i - 1 >= 0 and word == "儿":
+                new_seg[-1][0] = new_seg[-1][0] + seg[i][0]
+            else:
+                new_seg.append([word, pos])
+        return new_seg
+
+    def _merge_reduplication(
+            self, seg: List[Tuple[str, str]]) -> List[Tuple[str, str]]:
+        new_seg = []
+        for i, (word, pos) in enumerate(seg):
+            if new_seg and word == new_seg[-1][0]:
+                new_seg[-1][0] = new_seg[-1][0] + seg[i][0]
+            else:
+                new_seg.append([word, pos])
+        return new_seg
 
     def pre_merge_for_modify(
             self, seg: List[Tuple[str, str]]) -> List[Tuple[str, str]]:
         seg = self._merge_bu(seg)
         seg = self._merge_yi(seg)
+        seg = self._merge_reduplication(seg)
         seg = self._merge_continuous_three_tones(seg)
+        seg = self._merge_continuous_three_tones_2(seg)
+        seg = self._merge_er(seg)
         return seg
 
     def modified_tone(self, word: str, pos: str,

parakeet/utils/error_rate.py

@@ -0,0 +1,239 @@
+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""This module provides functions to calculate error rate in different level.
+e.g. wer for word-level, cer for char-level.
+"""
+import numpy as np
+
+__all__ = ['word_errors', 'char_errors', 'wer', 'cer']
+
+
+def _levenshtein_distance(ref, hyp):
+    """Levenshtein distance is a string metric for measuring the difference
+    between two sequences. Informally, the levenshtein disctance is defined as
+    the minimum number of single-character edits (substitutions, insertions or
+    deletions) required to change one word into the other. We can naturally
+    extend the edits to word level when calculate levenshtein disctance for
+    two sentences.
+    """
+    m = len(ref)
+    n = len(hyp)
+
+    # special case
+    if ref == hyp:
+        return 0
+    if m == 0:
+        return n
+    if n == 0:
+        return m
+
+    if m < n:
+        ref, hyp = hyp, ref
+        m, n = n, m
+
+    # use O(min(m, n)) space
+    distance = np.zeros((2, n + 1), dtype=np.int32)
+
+    # initialize distance matrix
+    for j in range(n + 1):
+        distance[0][j] = j
+
+    # calculate levenshtein distance
+    for i in range(1, m + 1):
+        prev_row_idx = (i - 1) % 2
+        cur_row_idx = i % 2
+        distance[cur_row_idx][0] = i
+        for j in range(1, n + 1):
+            if ref[i - 1] == hyp[j - 1]:
+                distance[cur_row_idx][j] = distance[prev_row_idx][j - 1]
+            else:
+                s_num = distance[prev_row_idx][j - 1] + 1
+                i_num = distance[cur_row_idx][j - 1] + 1
+                d_num = distance[prev_row_idx][j] + 1
+                distance[cur_row_idx][j] = min(s_num, i_num, d_num)
+
+    return distance[m % 2][n]
+
+
+def word_errors(reference, hypothesis, ignore_case=False, delimiter=' '):
+    """Compute the levenshtein distance between reference sequence and
+    hypothesis sequence in word-level.
+
+    Parameters
+    ----------
+    reference : str
+        The reference sentence.
+    hypothesis : str
+        The hypothesis sentence.
+    ignore_case : bool
+        Whether case-sensitive or not.
+    delimiter : char(str)
+        Delimiter of input sentences.
+
+    Returns
+    ----------
+    list
+        Levenshtein distance and word number of reference sentence.
+    """
+    if ignore_case:
+        reference = reference.lower()
+        hypothesis = hypothesis.lower()
+
+    ref_words = list(filter(None, reference.split(delimiter)))
+    hyp_words = list(filter(None, hypothesis.split(delimiter)))
+
+    edit_distance = _levenshtein_distance(ref_words, hyp_words)
+    return float(edit_distance), len(ref_words)
+
+
+def char_errors(reference, hypothesis, ignore_case=False, remove_space=False):
+    """Compute the levenshtein distance between reference sequence and
+    hypothesis sequence in char-level.
+
+    Parameters
+    ----------
+    reference: str
+        The reference sentence.
+    hypothesis: str
+        The hypothesis sentence.
+    ignore_case: bool
+        Whether case-sensitive or not.
+    remove_space: bool
+        Whether remove internal space characters
+
+    Returns
+    ----------
+    list
+        Levenshtein distance and length of reference sentence.
+    """
+    if ignore_case:
+        reference = reference.lower()
+        hypothesis = hypothesis.lower()
+
+    join_char = ' '
+    if remove_space:
+        join_char = ''
+
+    reference = join_char.join(list(filter(None, reference.split(' '))))
+    hypothesis = join_char.join(list(filter(None, hypothesis.split(' '))))
+
+    edit_distance = _levenshtein_distance(reference, hypothesis)
+    return float(edit_distance), len(reference)
+
+
+def wer(reference, hypothesis, ignore_case=False, delimiter=' '):
+    """Calculate word error rate (WER). WER compares reference text and
+    hypothesis text in word-level. WER is defined as:
+    .. math::
+        WER = (Sw + Dw + Iw) / Nw
+    where
+    .. code-block:: text
+        Sw is the number of words subsituted,
+        Dw is the number of words deleted,
+        Iw is the number of words inserted,
+        Nw is the number of words in the reference
+    We can use levenshtein distance to calculate WER. Please draw an attention
+    that empty items will be removed when splitting sentences by delimiter.
+
+    Parameters
+    ----------
+    reference: str
+        The reference sentence.
+
+    hypothesis: str
+        The hypothesis sentence.
+    ignore_case: bool
+        Whether case-sensitive or not.
+    delimiter: char
+        Delimiter of input sentences.
+
+    Returns
+    ----------
+    float
+         Word error rate.
+
+    Raises
+    ----------
+    ValueError
+        If word number of reference is zero.
+    """
+    edit_distance, ref_len = word_errors(reference, hypothesis, ignore_case,
+                                         delimiter)
+
+    if ref_len == 0:
+        raise ValueError("Reference's word number should be greater than 0.")
+
+    wer = float(edit_distance) / ref_len
+    return wer
+
+
+def cer(reference, hypothesis, ignore_case=False, remove_space=False):
+    """Calculate charactor error rate (CER). CER compares reference text and
+    hypothesis text in char-level. CER is defined as:
+    .. math::
+        CER = (Sc + Dc + Ic) / Nc
+    where
+    .. code-block:: text
+        Sc is the number of characters substituted,
+        Dc is the number of characters deleted,
+        Ic is the number of characters inserted
+        Nc is the number of characters in the reference
+    We can use levenshtein distance to calculate CER. Chinese input should be
+    encoded to unicode. Please draw an attention that the leading and tailing
+    space characters will be truncated and multiple consecutive space
+    characters in a sentence will be replaced by one space character.
+
+    Parameters
+    ----------
+    reference: str
+        The reference sentence.
+    hypothesis: str
+        The hypothesis sentence.
+    ignore_case: bool
+        Whether case-sensitive or not.
+    remove_space: bool
+        Whether remove internal space characters
+
+    Returns
+    ----------
+    float
+        Character error rate.
+
+    Raises
+    ----------
+    ValueError
+        If the reference length is zero.
+    """
+    edit_distance, ref_len = char_errors(reference, hypothesis, ignore_case,
+                                         remove_space)
+
+    if ref_len == 0:
+        raise ValueError("Length of reference should be greater than 0.")
+
+    cer = float(edit_distance) / ref_len
+    return cer
+
+
+if __name__ == "__main__":
+    reference = [
+        'j', 'iou4', 'zh', 'e4', 'iang5', 'x', 'v2', 'b', 'o1', 'k', 'ai1',
+        'sh', 'iii3', 'l', 'e5', 'b', 'ei3', 'p', 'iao1', 'sh', 'eng1', 'ia2'
+    ]
+    hypothesis = [
+        'j', 'iou4', 'zh', 'e4', 'iang4', 'x', 'v2', 'b', 'o1', 'k', 'ai1',
+        'sh', 'iii3', 'l', 'e5', 'b', 'ei3', 'p', 'iao1', 'sh', 'eng1', 'ia2'
+    ]
+    reference = " ".join(reference)
+    hypothesis = " ".join(hypothesis)
+    print(wer(reference, hypothesis))

setup.py

@@ -71,10 +71,13 @@ setup_info = dict(
         'pypinyin',
         'webrtcvad',
         'g2pM',
-        'praatio',
+        'praatio~=4.1',
         "h5py",
         "timer",
         'jsonlines',
+        'pyworld',
+        'typeguard',
+        'jieba',
     ],
     extras_require={'doc': ["sphinx", "sphinx-rtd-theme", "numpydoc"], },