SpeechRecognitionEngine.SpeechRecognitionRejected 事件

定義

命名空間:

System.Speech.Recognition

組件:

System.Speech.dll

套件:

System.Speech v10.0.0

來源:

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 Custom 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