在uwp中使用语音识别时出错

Question

我正在制作一个uwp应用程序，其中有语音搜索，我得到了以下代码:

我从一个关于语音识别的windows博客中得到了这个代码:

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();

我从一个网站上得到另一堆代码:

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;

虽然，每当我运行这些代码，他们似乎抛出一个错误。这是错误有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

请尝试启用"在线语音识别";在Windows设置下的开始>设置在隐私比;演讲。

并确保在你的应用程序功能中启用麦克风。