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* fix write Signed-off-by: fayejf <fayejf07@gmail.com> * decoding ctc Signed-off-by: fayejf <fayejf07@gmail.com> * temp set rnnt decoding return_best_hypothesis to true Signed-off-by: fayejf <fayejf07@gmail.com> * add wer cal back to transcribe_speech as requested Signed-off-by: fayejf <fayejf07@gmail.com> * add wer cal back to speech_to_text_buffered_infer_rnnt as requested Signed-off-by: fayejf <fayejf07@gmail.com> * add wer cal back to speech_to_text_buffered_infer_ctc as requested Signed-off-by: fayejf <fayejf07@gmail.com> * style fix Signed-off-by: fayejf <fayejf07@gmail.com> * reflect change in asr_evaluator Signed-off-by: fayejf <fayejf07@gmail.com> * reflect som and vahid comment Signed-off-by: fayejf <fayejf07@gmail.com> * remove return_best_hy=true in transcribe_speech Signed-off-by: fayejf <fayejf07@gmail.com> * no text skip Signed-off-by: fayejf <fayejf07@gmail.com> * revert partial Signed-off-by: fayejf <fayejf07@gmail.com> --------- Signed-off-by: fayejf <fayejf07@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| # Copyright (c) 2023, NVIDIA CORPORATION. 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 json | ||
| from typing import Tuple | ||
|
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||
| from nemo.collections.asr.metrics.wer import word_error_rate_detail | ||
| from nemo.utils import logging | ||
|
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|
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| def clean_label(_str: str, num_to_words: bool = True, langid="en") -> str: | ||
| """ | ||
| Remove unauthorized characters in a string, lower it and remove unneeded spaces | ||
| """ | ||
| replace_with_space = [char for char in '/?*\",.:=?_{|}~¨«·»¡¿„…‧‹›≪≫!:;ː→'] | ||
| replace_with_blank = [char for char in '`¨´‘’“”`ʻ‘’“"‘”'] | ||
| replace_with_apos = [char for char in '‘’ʻ‘’‘'] | ||
| _str = _str.strip() | ||
| _str = _str.lower() | ||
| for i in replace_with_blank: | ||
| _str = _str.replace(i, "") | ||
| for i in replace_with_space: | ||
| _str = _str.replace(i, " ") | ||
| for i in replace_with_apos: | ||
| _str = _str.replace(i, "'") | ||
| if num_to_words: | ||
| if langid == "en": | ||
| _str = convert_num_to_words(_str, langid="en") | ||
| else: | ||
| logging.info( | ||
| "Currently support basic num_to_words in English only. Please use Text Normalization to convert other languages! Skipping!" | ||
| ) | ||
|
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| ret = " ".join(_str.split()) | ||
| return ret | ||
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| def convert_num_to_words(_str: str, langid: str = "en") -> str: | ||
| """ | ||
| Convert digits to corresponding words. Note this is a naive approach and could be replaced with text normalization. | ||
| """ | ||
| if langid == "en": | ||
| num_to_words = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"] | ||
| _str = _str.strip() | ||
| words = _str.split() | ||
| out_str = "" | ||
| num_word = [] | ||
| for word in words: | ||
| if word.isdigit(): | ||
| num = int(word) | ||
| while num: | ||
| digit = num % 10 | ||
| digit_word = num_to_words[digit] | ||
| num_word.append(digit_word) | ||
| num = int(num / 10) | ||
| if not (num): | ||
| num_str = "" | ||
| num_word = num_word[::-1] | ||
| for ele in num_word: | ||
| num_str += ele + " " | ||
| out_str += num_str + " " | ||
| num_word.clear() | ||
| else: | ||
| out_str += word + " " | ||
| out_str = out_str.strip() | ||
| else: | ||
| raise ValueError( | ||
| "Currently support basic num_to_words in English only. Please use Text Normalization to convert other languages!" | ||
| ) | ||
| return out_str | ||
|
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|
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| def cal_write_wer( | ||
| pred_manifest: str = None, | ||
| pred_text_attr_name: str = "pred_text", | ||
| clean_groundtruth_text: bool = False, | ||
| langid: str = 'en', | ||
| use_cer: bool = False, | ||
| output_filename: str = None, | ||
| ) -> Tuple[str, dict, str]: | ||
| """ | ||
| Calculate wer, inserion, deletion and substitution rate based on groundtruth text and pred_text_attr_name (pred_text) | ||
| We use WER in function name as a convention, but Error Rate (ER) currently support Word Error Rate (WER) and Character Error Rate (CER) | ||
| """ | ||
| samples = [] | ||
| hyps = [] | ||
| refs = [] | ||
| eval_metric = "cer" if use_cer else "wer" | ||
|
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| with open(pred_manifest, 'r') as fp: | ||
| for line in fp: | ||
| sample = json.loads(line) | ||
|
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| if 'text' not in sample: | ||
| logging.info( | ||
| "ground-truth text is not present in manifest! Cannot calculate Word Error Rate. Returning!" | ||
| ) | ||
| return None, None, eval_metric | ||
|
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| hyp = sample[pred_text_attr_name] | ||
| ref = sample['text'] | ||
|
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| if clean_groundtruth_text: | ||
| ref = clean_label(ref, langid=langid) | ||
|
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| wer, tokens, ins_rate, del_rate, sub_rate = word_error_rate_detail( | ||
| hypotheses=[hyp], references=[ref], use_cer=use_cer | ||
| ) | ||
| sample[eval_metric] = wer # evaluatin metric, could be word error rate of character error rate | ||
| sample['tokens'] = tokens # number of word/characters/tokens | ||
| sample['ins_rate'] = ins_rate # insertion error rate | ||
| sample['del_rate'] = del_rate # deletion error rate | ||
| sample['sub_rate'] = sub_rate # substitution error rate | ||
|
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| samples.append(sample) | ||
| hyps.append(hyp) | ||
| refs.append(ref) | ||
|
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| total_wer, total_tokens, total_ins_rate, total_del_rate, total_sub_rate = word_error_rate_detail( | ||
| hypotheses=hyps, references=refs, use_cer=use_cer | ||
| ) | ||
|
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| if not output_filename: | ||
| output_manifest_w_wer = pred_manifest | ||
| else: | ||
| output_manifest_w_wer = output_filename | ||
|
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| with open(output_manifest_w_wer, 'w') as fout: | ||
| for sample in samples: | ||
| json.dump(sample, fout) | ||
| fout.write('\n') | ||
| fout.flush() | ||
|
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| total_res = { | ||
| "samples": len(samples), | ||
| "tokens": total_tokens, | ||
| eval_metric: total_wer, | ||
| "ins_rate": total_ins_rate, | ||
| "del_rate": total_del_rate, | ||
| "sub_rate": total_sub_rate, | ||
| } | ||
| return output_manifest_w_wer, total_res, eval_metric |
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