无法通过语音自适应增强来提高转录准确性

Question

我正在使用 SpeechRecognition Python 库执行语音转文本操作。我正在使用 recognize_google_cloud 函数来使用 Google Cloud Speech-to-Text API.

这是我的代码：

import speech_recognition as sr;
import json;

j = '';

with open('key.json', 'r') as f:
    j = f.read().replace('\n', '');

js = json.loads(j);

r = sr.Recognizer();
mic = sr.Microphone();

with candide as source:
    audio = r.record(source);
    print(r.recognize_google_cloud(audio, language='fr-FR', preferred_phrases=['pistoles', 'disait'], credentials_json=j));

函数 recognize_google_cloud 将麦克风捕获的数据发送到 Google API 并且 select 是一组备选方案中给定语音的最可能转录. 如本 page of the documentation 中所述，参数 preferered_phrases 用于 select 另一个包含所列单词的备选方案。

可以使用 speech adaptation boost 改进这些结果。由于 SpeechRecognition 库的版本不允许我们指定增强值，我用硬编码增强值更新了 speech_recognition/__init__.py 文件：

        if preferred_phrases is not None:
            speech_config["speechContexts"] = {"phrases": preferred_phrases, "boost": 19}

不幸的是，当我执行我的代码时，出现以下错误：

Traceback (most recent call last):
  File "/home/pierre/.local/lib/python3.8/site-packages/speech_recognition/__init__.py", line 931, in recognize_google_cloud
    response = request.execute()
  File "/home/pierre/.local/lib/python3.8/site-packages/googleapiclient/_helpers.py", line 134, in positional_wrapper
    return wrapped(*args, **kwargs)
  File "/home/pierre/.local/lib/python3.8/site-packages/googleapiclient/http.py", line 915, in execute
    raise HttpError(resp, content, uri=self.uri)
googleapiclient.errors.HttpError: <HttpError 400 when requesting https://speech.googleapis.com/v1/speech:recognize?alt=json returned "Invalid JSON payload received. Unknown name "boost" at 'config.speech_contexts': Cannot find field.". Details: "[{'@type': 'type.googleapis.com/google.rpc.BadRequest', 'fieldViolations': [{'field': 'config.speech_contexts', 'description': 'Invalid JSON payload received. Unknown name "boost" at \'config.speech_contexts\': Cannot find field.'}]}]">

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "spech_reco.py", line 23, in <module>
    print(r.recognize_google_cloud(audio, language='fr-FR', preferred_phrases=['pistoles', 'disait'], credentials_json=j));
  File "/home/pierre/.local/lib/python3.8/site-packages/speech_recognition/__init__.py", line 933, in recognize_google_cloud
    raise RequestError(e)
speech_recognition.RequestError: <HttpError 400 when requesting https://speech.googleapis.com/v1/speech:recognize?alt=json returned "Invalid JSON payload received. Unknown name "boost" at 'config.speech_contexts': Cannot find field.". Details: "[{'@type': 'type.googleapis.com/google.rpc.BadRequest', 'fieldViolations': [{'field': 'config.speech_contexts', 'description': 'Invalid JSON payload received. Unknown name "boost" at \'config.speech_contexts\': Cannot find field.'}]}]">

我的请求有错误吗？

Answer 1

我了解到您正在修改 SpeechRecognition library 的 speech_recognition/__init__.py 文件，以便在您的请求中包含“提升”参数。

查看此文件时，我注意到它使用的是 'v1' version of the API; however, the "boost" parameter is only supported in the ‘v1p1beta1’ version

因此，您可以在代码中进行以下修改：

`speech_service = build ("speech","v1p1beta1", credentials = api_credentials, cache_discovery = False)`

通过此修改，您应该不会再看到 BadRequest 错误。

同时，请注意本库是第三方库，内部使用Google Speech-to-text API。因此，如果这个库不能满足您当前的所有需求，另一种选择可以直接使用 Speech-to-text API Python Client library.

创建您自己的实现

无法通过语音自适应增强来提高转录准确性

Unable to improve transcription accuracy with speech adaptation boost

python

google-cloud-platform

google-speech-api