在 uwp 中使用语音识别时出错

Question

我正在制作一个 uwp 应用，里面有语音搜索，我得到了以下代码：

我从一个关于语音识别的 windows 博客中获得了这段代码：

          var speechRecognizer = new Windows.Media.SpeechRecognition.SpeechRecognizer();

        //speechRecognizer.RecognitionQualityDegrading += speechRecognizer_RecognitionQualityDegrading;

        // Add a web search grammar to the recognizer.
        var webSearchGrammar = new Windows.Media.SpeechRecognition.SpeechRecognitionTopicConstraint(Windows.Media.SpeechRecognition.SpeechRecognitionScenario.WebSearch, "webSearch");


        speechRecognizer.UIOptions.AudiblePrompt = "Say what you want to search for...";
        speechRecognizer.UIOptions.ExampleText = @"Ex. 'weather for London'";
        speechRecognizer.Constraints.Add(webSearchGrammar);


        // Compile the constraint.
        await speechRecognizer.CompileConstraintsAsync();

        // Start recognition.
        Windows.Media.SpeechRecognition.SpeechRecognitionResult speechRecognitionResult = await speechRecognizer.RecognizeWithUIAsync();
        await speechRecognizer.RecognizeWithUIAsync();

        // Do something with the recognition result.
        var messageDialog = new Windows.UI.Popups.MessageDialog(speechRecognitionResult.Text, "Text spoken");
        await messageDialog.ShowAsync();

我从一个网站得到了另外一堆代码：

async void Button_Click_2(object sender, RoutedEventArgs e)
{
    this.recognizer = new SpeechRecognizer();
    await this.recognizer.CompileConstraintsAsync();

    this.recognizer.Timeouts.InitialSilenceTimeout = TimeSpan.FromSeconds(5);
    this.recognizer.Timeouts.EndSilenceTimeout = TimeSpan.FromSeconds(20);

    this.recognizer.UIOptions.AudiblePrompt = "Say whatever you like, I'm listening";
    this.recognizer.UIOptions.ExampleText = "The quick brown fox jumps over the lazy dog";
    this.recognizer.UIOptions.ShowConfirmation = true;
    this.recognizer.UIOptions.IsReadBackEnabled = true;
    this.recognizer.Timeouts.BabbleTimeout = TimeSpan.FromSeconds(5);

    var result = await this.recognizer.RecognizeWithUIAsync();

    if (result != null)
    {
        StringBuilder builder = new StringBuilder();

        builder.AppendLine(
          $"I have {result.Confidence} confidence that you said [{result.Text}] " +
          $"and it took {result.PhraseDuration.TotalSeconds} seconds to say it " +
          $"starting at {result.PhraseStartTime:g}");

        var alternates = result.GetAlternates(10);

        builder.AppendLine(
          $"There were {alternates?.Count} alternates - listed below (if any)");

        if (alternates != null)
        {
            foreach (var alternate in alternates)
            {
                builder.AppendLine(
                  $"Alternate {alternate.Confidence} confident you said [{alternate.Text}]");
            }
        }
        this.txtResults.Text = builder.ToString();
    }
}
SpeechRecognizer recognizer;

尽管如此，每当我运行这些代码时，它们似乎都会引发错误。 This is the error 谁能告诉我如何解决这个错误，我在网上搜索了它，但没有得到任何东西......

Answer 1

请尝试在 Windows 设置中的“开始”>“设置”>“隐私”>“语音”下启用“在线语音识别”。

并确保在您的应用功能中启用麦克风。