SpeechRecognitionEngine.AudioPosition Egenskap

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

public TimeSpan AudioPosition { get; }

member this.AudioPosition : TimeSpan

Public ReadOnly Property AudioPosition As TimeSpan

Egenskapsvärde

Den aktuella platsen i ljudströmmen som genereras av indataenheten.

Exempel

I följande exempel använder den processbaserade taligenkänningen en dikterings grammatik för att matcha talindata. En hanterare för SpeechDetected händelsen skriver till konsolen AudioPosition, RecognizerAudioPositionoch AudioLevel när taligenkänningen identifierar tal vid indata.

using System;
using System.Speech.Recognition;

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

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

        // Create a grammar for finding services in different cities.
        Choices services = new Choices(new string[] { "restaurants", "hotels", "gas stations" });
        Choices cities = new Choices(new string[] { "Seattle", "Boston", "Dallas" });

        GrammarBuilder findServices = new GrammarBuilder("Find");
        findServices.Append(services);
        findServices.Append("near");
        findServices.Append(cities);

        // Create a Grammar object from the GrammarBuilder and load it to the recognizer.
        Grammar servicesGrammar = new Grammar(findServices);
        recognizer.LoadGrammarAsync(servicesGrammar);

        // Add handlers for events.
        recognizer.SpeechRecognized +=
          new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);
        recognizer.SpeechDetected +=
          new EventHandler<SpeechDetectedEventArgs>(recognizer_SpeechDetected);

        // Start asynchronous recognition.
        recognizer.RecognizeAsync();
        Console.WriteLine("Starting asynchronous recognition...");

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

    // Gather information about detected speech and write it to the console.
    static void recognizer_SpeechDetected(object sender, SpeechDetectedEventArgs e)
    {
      Console.WriteLine();
      Console.WriteLine("Speech detected:");
      Console.WriteLine("  Audio level: " + recognizer.AudioLevel);
      Console.WriteLine("  Audio position at the event: " + e.AudioPosition);
      Console.WriteLine("  Current audio position: " + recognizer.AudioPosition);
      Console.WriteLine("  Current recognizer audio position: " +
        recognizer.RecognizerAudioPosition);
    }

    // Write the text of the recognition result to the console.
    static void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
    {
      Console.WriteLine("\nSpeech recognized: " + e.Result.Text);

      // Add event handler code here.
    }
  }
}

Kommentarer

Egenskapen AudioPosition refererar till indataenhetens position i den genererade ljudströmmen. Egenskapen refererar däremot RecognizerAudioPosition till identifierarens position inom dess ljudindata. Dessa positioner kan vara olika. Om identifieraren till exempel har tagit emot indata som den ännu inte har genererat ett igenkänningsresultat för är värdet RecognizerAudioPosition för egenskapen mindre än värdet för AudioPosition egenskapen.

Se även

• RecognizerAudioPosition
• AudioPosition