SpeechRecognitionEngine.SpeechRecognitionRejected 事件

定義

命名空間:

System.Speech.Recognition

組件:

System.Speech.dll

套件:

System.Speech v8.0.0

Source:

SpeechRecognitionEngine.cs

在 SpeechRecognitionEngine 收到的輸入不符合任何其已載入且已啟用 Grammar 物件時引發。

public:
 event EventHandler<System::Speech::Recognition::SpeechRecognitionRejectedEventArgs ^> ^ SpeechRecognitionRejected;

public event EventHandler<System.Speech.Recognition.SpeechRecognitionRejectedEventArgs> SpeechRecognitionRejected;

member this.SpeechRecognitionRejected : EventHandler<System.Speech.Recognition.SpeechRecognitionRejectedEventArgs> 

Public Event SpeechRecognitionRejected As EventHandler(Of SpeechRecognitionRejectedEventArgs) 

事件類型

EventHandler<SpeechRecognitionRejectedEventArgs>

範例

下列範例會辨識「在音樂類別中顯示藝術師清單」或「顯示相簿」等片語。 此範例使用 SpeechRecognitionRejected 事件的處理常式，在語音輸入無法比對至文法 Confidence 的內容時，在主控台中顯示通知，足以產生成功的辨識。 處理常式也會顯示因為低信賴分數而遭到拒絕的辨識結果 Alternates 。

using System;  
using System.Speech.Recognition;  

namespace SampleRecognition  
{  
  class Program  
  {  
    static void Main(string[] args)  

    // Initialize an in-process speech recognition engine.  
    {  
      using (SpeechRecognitionEngine recognizer =  
         new SpeechRecognitionEngine(new System.Globalization.CultureInfo("en-US")))  
      {  

        // Create a grammar.  
        //  Create lists of alternative choices.  
        Choices listTypes = new Choices(new string[] { "albums", "artists" });  
        Choices genres = new Choices(new string[] {   
          "blues", "classical", "gospel", "jazz", "rock" });  

        //  Create a GrammarBuilder object and assemble the grammar components.  
        GrammarBuilder mediaMenu = new GrammarBuilder("Display");  
        mediaMenu.Append("the list of", 0, 1);  
        mediaMenu.Append(listTypes);  
        mediaMenu.Append("in the", 0, 1);  
        mediaMenu.Append(genres);  
        mediaMenu.Append("category", 0, 1);  

        //  Build a Grammar object from the GrammarBuilder.  
        Grammar mediaMenuGrammar = new Grammar(mediaMenu);  
        mediaMenuGrammar.Name = "Media Chooser";  

        // Attach event handlers.  
        recognizer.LoadGrammarCompleted +=  
          new EventHandler<LoadGrammarCompletedEventArgs>(recognizer_LoadGrammarCompleted);  
        recognizer.SpeechRecognized +=  
          new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);  
        recognizer.SpeechRecognitionRejected +=  
          new EventHandler<SpeechRecognitionRejectedEventArgs>(recognizer_SpeechRecognitionRejected);  

        // Load the grammar object to the recognizer.  
        recognizer.LoadGrammarAsync(mediaMenuGrammar);  

        // Set the input to the recognizer.  
        recognizer.SetInputToDefaultAudioDevice();  

        // Start recognition.  
        recognizer.RecognizeAsync(RecognizeMode.Multiple);  

        // Keep the console window open.  
        Console.ReadLine();  
      }  
    }  

    // Handle the SpeechRecognitionRejected event.  
    static void recognizer_SpeechRecognitionRejected(object sender, SpeechRecognitionRejectedEventArgs e)  
    {  
      Console.WriteLine("Speech input was rejected.");  
      foreach (RecognizedPhrase phrase in e.Result.Alternates)  
      {  
      Console.WriteLine("  Rejected phrase: " + phrase.Text);  
      Console.WriteLine("  Confidence score: " + phrase.Confidence);  
      }  
    }  

    // Handle the LoadGrammarCompleted event.  
    static void recognizer_LoadGrammarCompleted(object sender, LoadGrammarCompletedEventArgs e)  
    {  
      Console.WriteLine("Grammar loaded: " + e.Grammar.Name);  
    }  

    // Handle the SpeechRecognized event.  
    static void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)  
    {  
      Console.WriteLine("Speech recognized: " + e.Result.Text);  
      Console.WriteLine("  Confidence score: " + e.Result.Confidence);  
    }  
  }  
}  

備註

如果辨識器判斷輸入不符合任何載入和啟用 Grammar 物件的信賴度，就會引發這個事件。 的 ResultSpeechRecognitionRejectedEventArgs 屬性包含拒絕 RecognitionResult 的物件。 您可以使用 事件的處理常式 SpeechRecognitionRejected 來擷取已拒絕的 Confidence 辨識 Alternates 及其分數。

如果您的應用程式使用 SpeechRecognitionEngine 實例，您可以使用其中 UpdateRecognizerSetting 一種方法來修改接受或拒絕語音輸入的信賴等級。 您可以使用 、 InitialSilenceTimeout 、 EndSilenceTimeout 和 EndSilenceTimeoutAmbiguous 屬性來修改語音辨識回應非語音輸入 BabbleTimeout 的方式。

建立 SpeechRecognitionRejected 委派時，必須識別處理事件的方法。 若要使事件與您的事件處理常式產生關聯，請將委派的執行個體 (Instance) 加入至事件。 除非您移除委派，否則每當事件發生時就會呼叫事件處理常式。 如需事件處理常式委派的詳細資訊，請參閱 事件和委派。

另請參閱

• SpeechDetectedEventArgs
• Recognize()
• RecognizeAsync()
• EmulateRecognize(String)
• EmulateRecognizeAsync(String)
• SpeechDetected
• SpeechHypothesized
• SpeechRecognized