RecognizeCompletedEventArgs.AudioPosition Eigenschaft

public:
 property TimeSpan AudioPosition { TimeSpan get(); };

public TimeSpan AudioPosition { get; }

member this.AudioPosition : TimeSpan

Public ReadOnly Property AudioPosition As TimeSpan

Eigenschaftswert

Die Position im Audiodatenstrom des Eingabegeräts, der dem RecognizeCompleted Ereignis zugeordnet ist.

Beispiele

Im folgenden Beispiel wird die asynchrone Spracherkennung für eine Spracherkennungsgrammatik mithilfe der SpeechRecognitionEngine.RecognizeAsync Methode mit der In-Process-Erkennung ausgeführt. Das Beispiel verwendet Choices und GrammarBuilder Objekte, um die Spracherkennungsgrammatik zu erstellen, bevor sie in ein Grammar Objekt integriert wird. Ein Handler für das SpeechRecognitionEngine.RecognizeCompleted Ereignis gibt Informationen zum Erkennungsvorgang an die Konsole aus.

using System;
using System.Speech.Recognition;

namespace SampleRecognition
{
  class Program
  {
    private static SpeechRecognitionEngine recognizer;
    public static void Main(string[] args)
    {

      // Initialize a SpeechRecognitionEngine object and set its input.
      recognizer = new SpeechRecognitionEngine(new System.Globalization.CultureInfo("en-US"));
      recognizer.SetInputToDefaultAudioDevice();

      // Configure recognition parameters.
      recognizer.InitialSilenceTimeout = TimeSpan.FromSeconds(5.0);
      recognizer.BabbleTimeout = TimeSpan.FromSeconds(3.0);
      recognizer.EndSilenceTimeout = TimeSpan.FromSeconds(1.0);
      recognizer.EndSilenceTimeoutAmbiguous = TimeSpan.FromSeconds(1.0);

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

      // Add a handler for the RecognizeCompleted event.
      recognizer.RecognizeCompleted +=
        new EventHandler<RecognizeCompletedEventArgs>(recognizer_RecognizeCompleted);

      // Create a speech recognition grammar and build it into a Grammar object.
      Choices bankingMenu = new Choices(new string[]
      { "Access accounts", "Transfer funds", "Pay bills", "Get loan balance" });
      GrammarBuilder banking = new GrammarBuilder(bankingMenu);
      Grammar bankGrammar = new Grammar(banking);
      bankGrammar.Name = "Banking Menu";

      // Load the Grammar objects to the recognizer.
      recognizer.LoadGrammarAsync(bankGrammar);

      // Start asynchronous, continuous recognition.
      recognizer.RecognizeAsync();

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

    // Handle the RecognizeCompleted event.
    static void recognizer_RecognizeCompleted(object sender, RecognizeCompletedEventArgs e)
    {
      if (e.Error != null)
      {
        Console.WriteLine(
          "RecognizeCompleted, error occurred during recognition: {0}", e.Error);
        return;
      }

      if (e.InitialSilenceTimeout || e.BabbleTimeout)
      {
        Console.WriteLine(
          "RecognizeCompleted: BabbleTimeout({0}), InitialSilenceTimeout({1}).",
          e.BabbleTimeout, e.InitialSilenceTimeout);
        return;
      }

      if (e.InputStreamEnded)
      {
        Console.WriteLine(
          "RecognizeCompleted: AudioPosition({0}), InputStreamEnded({1}).",
          e.AudioPosition, e.InputStreamEnded);
      }

      if (e.Result != null)
      {
        Console.WriteLine(
          "RecognizeCompleted: Grammar ({0}), Text ({1}), Confidence ({2}), AudioPosition ({3}).",
          e.Result.Grammar.Name, e.Result.Text, e.Result.Confidence, e.AudioPosition);
      }

      else
      {
        Console.WriteLine("RecognizeCompleted: No result.");
      }

      Console.WriteLine();
      Console.WriteLine("Press any key to exit...");
      Console.ReadKey();
    }

    // Handle the LoadGrammarCompleted event.
    static void recognizer_LoadGrammarCompleted(object sender, LoadGrammarCompletedEventArgs e)
    {
      string grammarName = e.Grammar.Name;
      bool grammarLoaded = e.Grammar.Loaded;
      bool grammarEnabled = e.Grammar.Enabled;

      if (e.Error != null)
      {
        Console.WriteLine("LoadGrammar for {0} failed with a {1}.",
        grammarName, e.Error.GetType().Name);

        // Add exception handling code here.
      }

      Console.WriteLine("Grammar {0} {1} loaded and {2} enabled.", grammarName,
        (grammarLoaded) ? "is" : "is not", (grammarEnabled) ? "is" : "is not");
    }
  }
}

Hinweise

Diese Eigenschaft verweist auf die Position am Anfang des erkannten Ausdrucks im generierten Audiodatenstrom des Eingabegeräts. Im Gegensatz dazu verweist die RecognizerAudioPosition Eigenschaft auf die Position der Erkennung innerhalb der Audioeingabe. Diese Positionen können unterschiedlich sein. Weitere Informationen finden Sie unter Verwenden von Spracherkennungsereignissen.

Weitere Informationen

• SpeechRecognitionEngine
• RecognizeCompleted
• AudioPosition