SpeechRecognizer.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

語音辨識器自其中接收到輸入之音訊輸入資料流中的目前位置。

範例

在下列範例中，共用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 SpeechRecognizer recognizer;
    public static void Main(string[] args)
    {

      // Initialize a shared speech recognition engine.
      recognizer = new SpeechRecognizer();

      // Add handlers for events.
      recognizer.LoadGrammarCompleted +=
        new EventHandler<LoadGrammarCompletedEventArgs>(recognizer_LoadGrammarCompleted);
      recognizer.SpeechRecognized +=
        new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);
      recognizer.StateChanged +=
        new EventHandler<StateChangedEventArgs>(recognizer_StateChanged);
      recognizer.SpeechDetected +=
        new EventHandler<SpeechDetectedEventArgs>(recognizer_SpeechDetected);

      // Create a dictation grammar.
      Grammar dictation = new DictationGrammar();
      dictation.Name = "Dictation";

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

      // 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: " + recognizer.AudioPosition);
      Console.WriteLine("  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("Speech recognized: " + e.Result.Text);

      // Add event handler code here.
    }

    // Write the name of the loaded grammar to the console.
    static void recognizer_LoadGrammarCompleted(object sender, LoadGrammarCompletedEventArgs e)
    {
      Console.WriteLine("Grammar loaded: " + e.Grammar.Name);
    }

    // Put the shared speech recognizer into "listening" mode.
    static void recognizer_StateChanged(object sender, StateChangedEventArgs e)
    {
      if (e.RecognizerState != RecognizerState.Stopped)
      {
        recognizer.EmulateRecognizeAsync("Start listening");
      }
    }
  }
}

備註

當桌面語音辨識正在執行時，共用辨識器會收到輸入。

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處理音訊輸入時的位置。 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