SpeechRecognitionEngine.AudioPosition 屬性

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

public TimeSpan AudioPosition { get; }

member this.AudioPosition : TimeSpan

Public ReadOnly Property AudioPosition As TimeSpan

屬性值

輸入裝置所產生之音訊資料流中的目前位置。

範例

在下列範例中，進程語音辨識器會使用聽寫文法來比對語音輸入。 當語音辨識器在其輸入偵測到語音時，事件的處理常式 SpeechDetected 會寫入主控台 AudioPosition 、 RecognizerAudioPosition 和 AudioLevel 。

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.
    }
  }
}

備註

屬性 AudioPosition 會參考輸入裝置在其產生的音訊資料流程中的位置。 相較之下， RecognizerAudioPosition 屬性會參考辨識器在其音訊輸入內的位置。 這些位置可能不同。 例如，如果辨識器已收到尚未產生辨識結果的 RecognizerAudioPosition 輸入，則屬性的值小於 屬性的值 AudioPosition 。

另請參閱

• RecognizerAudioPosition
• AudioPosition