RecognizedAudio.AudioPosition Property

 

Gets the location in the input audio stream for the start of the recognized audio.

Namespace:   System.Speech.Recognition
Assembly:  System.Speech (in System.Speech.dll)

public TimeSpan AudioPosition { get; }

Property Value

Type: System.TimeSpan

The location in the input audio stream for the start of the recognized audio.

This property references the position at the beginning of the recognized phrase in the input device's generated audio stream. By contrast, the RecognizerAudioPosition property of the SpeechRecognitionEngine and SpeechRecognizer classes reference the recognizer's position within its audio input. These positions can be different. For more information, see Using Speech Recognition Events.

The StartTime property gets the system time at the start of the recognition operation.

The following example handles the SpeechRecognitionEngine.SpeechRecognized or SpeechRecognizer.SpeechRecognized event and outputs to the console information about the recognized audio that is associated with the recognition result.


// Handle the SpeechRecognized event. 
void SpeechRecognizedHandler(object sender, SpeechRecognizedEventArgs e)
{
  if (e.Result == null) return;

  RecognitionResult result = e.Result;

  Console.WriteLine("Grammar({0}): {1}",
    result.Grammar.Name, result.Text);

  if (e.Result.Audio != null)
  {
    RecognizedAudio audio = e.Result.Audio;

    Console.WriteLine("   start time: {0}", audio.StartTime);
    Console.WriteLine("   encoding format: {0}", audio.Format.EncodingFormat);
    Console.WriteLine("   position: {0}, duration: {1}",
      audio.AudioPosition, audio.Duration);
  }

  // Add event handler code here.
}

.NET Framework
Available since 3.0
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