SpeechRecognitionEngine.SpeechRecognized 事件

定義

命名空間:

System.Speech.Recognition

組件:

System.Speech.dll

套件:

System.Speech v9.0.0-preview.3.24172.9

來源:

SpeechRecognitionEngine.cs

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

public:
 event EventHandler<System::Speech::Recognition::SpeechRecognizedEventArgs ^> ^ SpeechRecognized;

public event EventHandler<System.Speech.Recognition.SpeechRecognizedEventArgs> SpeechRecognized;

member this.SpeechRecognized : EventHandler<System.Speech.Recognition.SpeechRecognizedEventArgs> 

Public Event SpeechRecognized As EventHandler(Of SpeechRecognizedEventArgs) 

事件類型

EventHandler<SpeechRecognizedEventArgs>

範例

下列範例是主控台應用程式的一部分，可建立語音辨識文法、建構 Grammar 物件，並將它載入至 SpeechRecognitionEngine 以執行辨識。 此範例示範對 SpeechRecognitionEngine 的語音輸入、相關聯的辨識結果，以及語音辨識器所引發的相關聯事件。

語音輸入，例如「我想要從芝加哥飛出至邁阿密」，將會觸發 SpeechRecognized 事件。 說出「從芝加哥飛出我」一詞，將不會觸發 SpeechRecognized 事件。

此範例會使用 事件的處理常式 SpeechRecognized 來顯示成功辨識的片語，以及它們包含在主控台中的語意。

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())  
      {  

        // Create SemanticResultValue objects that contain cities and airport codes.  
        SemanticResultValue chicago = new SemanticResultValue("Chicago", "ORD");  
        SemanticResultValue boston = new SemanticResultValue("Boston", "BOS");  
        SemanticResultValue miami = new SemanticResultValue("Miami", "MIA");  
        SemanticResultValue dallas = new SemanticResultValue("Dallas", "DFW");  

        // Create a Choices object and add the SemanticResultValue objects, using  
        // implicit conversion from SemanticResultValue to GrammarBuilder  
        Choices cities = new Choices();  
        cities.Add(new Choices(new GrammarBuilder[] { chicago, boston, miami, dallas }));  

        // Build the phrase and add SemanticResultKeys.  
        GrammarBuilder chooseCities = new GrammarBuilder();  
        chooseCities.Append("I want to fly from");  
        chooseCities.Append(new SemanticResultKey("origin", cities));  
        chooseCities.Append("to");  
        chooseCities.Append(new SemanticResultKey("destination", cities));  

        // Build a Grammar object from the GrammarBuilder.  
        Grammar bookFlight = new Grammar(chooseCities);  
        bookFlight.Name = "Book Flight";  

        // Add a handler for the LoadGrammarCompleted event.  
        recognizer.LoadGrammarCompleted +=  
          new EventHandler<LoadGrammarCompletedEventArgs>(recognizer_LoadGrammarCompleted);  

        // Add a handler for the SpeechRecognized event.  
        recognizer.SpeechRecognized +=  
          new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);  

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

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

        // Start recognition.  
        recognizer.RecognizeAsync();  

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

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

    // Handle the SpeechRecognized event.  
    static void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)  
    {  
      Console.WriteLine("Speech recognized:  " + e.Result.Text);  
      Console.WriteLine();  
      Console.WriteLine("Semantic results:");  
      Console.WriteLine("  The flight origin is " + e.Result.Semantics["origin"].Value);  
      Console.WriteLine("  The flight destination is " + e.Result.Semantics["destination"].Value);  
    }  
  }  
}  

備註

您可以使用 或 方法之 RecognizeRecognizeAsync 一來起始辨識作業。 如果辨識器判斷輸入符合其中一個載入 Grammar 的物件，且有足夠的信賴等級可構成辨識，就會引發 SpeechRecognized 事件。 Result的 SpeechRecognitionRejectedEventArgs 屬性包含已 RecognitionResult 接受的物件。 SpeechRecognized事件的處理常式可以取得已辨識的片語，以及具有較低信賴分數的辨識 Alternates 清單。

如果您的應用程式使用 實例，您可以使用其中 UpdateRecognizerSetting 一 SpeechRecognitionEngine 種方法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，修改語音辨識回應非語音輸入 BabbleTimeout 的方式。

當辨識器收到符合文法的輸入時， Grammar 物件可以引發其 SpeechRecognized 事件。 物件 GrammarSpeechRecognized 的事件會在語音辨識器 SpeechRecognized 的事件之前引發。 特定文法的特定任何工作都應該由 事件的處理常式 SpeechRecognized 執行。

建立 SpeechRecognized 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
• Grammar
• RecognitionResult
• Recognize()
• RecognizeAsync()
• EmulateRecognize(String)
• EmulateRecognizeAsync(String)
• SpeechDetected
• SpeechHypothesized
• SpeechRecognitionRejected
• RecognitionEventArgs