Windows Phone 8.1应用程序中的语音识别器在线

Question

我在Windows Phone 8.1应用程序中遇到语音识别大问题。
我的代码（我在Google中找到了类似的代码）：

private SpeechRecognizer speechRecognizer;

public async Task InitializeSpeechRecognizerAsync()
{
    speechRecognizer = new SpeechRecognizer();

    SpeechRecognitionTopicConstraint topicConstraint =
        new SpeechRecognitionTopicConstraint(SpeechRecognitionScenario.Dictation,
        "dictation");

    speechRecognizer.Constraints.Add(topicConstraint);

    await speechRecognizer.CompileConstraintsAsync();
}

然后单击事件：

private async void BtnAge_Click(object sender, RoutedEventArgs e)
{
    SpeechRecognitionResult recognitionResult = await speechRecognizer.RecognizeWithUIAsync();
}

当然-它不起作用并引发异常

Operation is not valid due to the current state of the object.

我知道如何在Windows Phone 8.0上识别语音，但不知道如何在WP 8.1上识别语音。

Answer 1

确保您的设备安装了合适的语音语言并与Recognizer对象相关联。 您可以使用MSDN上记录的与语言相关的属性进行验证

Answer 2

尝试使用与调用RecognizeWithUIAsync（）相同的方法来放置代码以初始化识别器。 这是我自己的应用程序中肯定有效的代码：

public async Task<string> RecognizeSpeech()
{
  SpeechRecognizer recognizer = new SpeechRecognizer();
  SpeechRecognitionTopicConstraint topicConstraint = new SpeechRecognitionTopicConstraint(SpeechRecognitionScenario.Dictation, "Message");
  recognizer.Constraints.Add(topicConstraint);
  await recognizer.CompileConstraintsAsync();
  SpeechRecognitionResult result = await recognizer.RecognizeWithUIAsync();
  if (result.Confidence == SpeechRecognitionConfidence.High || result.Confidence == SpeechRecognitionConfidence.Medium)
  {
    return result.Text;
  }
  return null;
}