如何在 Windows 10 UWP 中正确实现语音识别

Question

到目前为止，我对在 Microsoft 网站上找到的语音识别示例没有任何帮助。我还查看了这个网站 - https://mtaulty.com/2016/02/08/text-to-speech-and-more-with-windows-10-uwp-project-oxford/ 并尝试使用给出的示例，但它仍然无法正常工作。正在发生的事情是 SpeechRecognitionConfidence 被拒绝（我没有说什么）。在你问之前，是的，我有一个可以使用的麦克风，并且在“设置”中启用了所有功能。

我在这里缺少什么简单的东西吗？

如果您不太理解我的问题，请滚动到我上面链接的页面底部，并且用户 nhwilly1011 遇到了与我相同的问题。

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;

我也试过微软的例子，它也不起作用--

    private async void Button_Click_1(object sender, RoutedEventArgs e)
    {
        // Create an instance of SpeechRecognizer.
        var speechRecognizer = new Windows.Media.SpeechRecognition.SpeechRecognizer();

        //// Listen for audio input issues.
        //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();
    }

Answer 1

我已经找到答案了。我的电脑没有启用 Cortana，所以我最初没有收到错误消息。使用具有 Cortana 的计算机后，我发现我使用的网络存在问题。切换网络后，一切都按预期工作。我的错误是语音识别错误：“无法访问网络”，并通过切换到不安全的 WiFi 连接来解决。

Answer 2

如果我遗漏了什么，请纠正我，但在调用CompileConstraintsAsync 之前，建议将SpeechRecognitionTopicConstraint 添加到SpeechRecognizer 的约束集合中。 这是我发现的一个有用的演练，here。

Answer 3

在这里您可能会发现来自 Windows.Media.SpeechRecognition 的唤醒词语音识别

    public MAINPage()
            {
     this.InitializeComponent();
    this.Loaded += OnLoaded;
    
    } 
Windows.Media.SpeechRecognition.SpeechRecognizer recognizer;
    public async void OnLoaded(object sender, RoutedEventArgs args)
            {
                this.recognizer = new SpeechRecognizer();
    
                var commands = new Dictionary<string, int>()
                { 
                    [Constants.WAKEUP_INIT_WORD] = -90, //define your start word
                    [Constants.WAKEUP_STOP_WORD] = 90 //define your stop word
                };
    
                this.recognizer.Constraints.Add(new SpeechRecognitionListConstraint(
                  commands.Keys));
    
                await this.recognizer.CompileConstraintsAsync();
    
                this.recognizer.ContinuousRecognitionSession.ResultGenerated +=
                  async (s, e) =>
                  {
                      if ((e.Result != null) && (commands.ContainsKey(e.Result.Text)))
                      {
                          await this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
                    () =>
                        {
                            
                            //e.Result.Confidence
                            double confidence = e.Result.RawConfidence;
                            if (e.Result.Confidence == SpeechRecognitionConfidence.Medium || e.Result.Confidence == SpeechRecognitionConfidence.High || confidence >0.85)
                            {
                                if (e.Result.Text == Constants.WAKEUP_INIT_WORD)
                                {
                                    recordButton_Click(sender, args);
                                    stopRecordButton.IsEnabled = true;
                                    recordButton.IsEnabled = false;
    
                                }
                                if (e.Result.Text == Constants.WAKEUP_STOP_WORD)
                                {
                                    stopRecordButton_Click(sender, args);
                                    recordButton.IsEnabled = true;
                                    stopRecordButton.IsEnabled = false;
                                }
                            }
    
                        }
                  );
                          this.recognizer.ContinuousRecognitionSession.Resume();
                      }
                  };
    
                await this.recognizer.ContinuousRecognitionSession.StartAsync(
                  SpeechContinuousRecognitionMode.PauseOnRecognition);
            }
enter code here

更多品种在这里https://mtaulty.com/2016/02/08/text-to-speech-and-more-with-windows-10-uwp-project-oxford/