AudioSignalProblem Enumeration
Enumerates the types of audio signal problems.
Assembly: System.Speech (in System.Speech.dll)
| Member name | Description | |
|---|---|---|
| None | Audio input can be processed by the recognition engine. | |
| TooNoisy | Audio input has too much background noise for the recognition engine to process. | |
| NoSignal | No audio input is detected. | |
| TooLoud | Audio input is too loud for the recognition engine to process. | |
| TooSoft | Audio input is not loud enough for the recognition engine to process. | |
| TooFast | Audio input is too fast for the recognition engine to process. | |
| TooSlow | Audio input is too slow for the recognition engine to process. |
In the example is a diagnostic that displays detailed information about speech recognition operations. The member of the AudioSignalProblem enumeration returned by an instance of AudioStatus (recognizerAudioStatus) is checked, and if problem exist that information is logged.
private void DisplayRecognitionDetails(string eventType, RecognitionResult result, AudioStatus recognizerAudioStatus) {
String info;
info = eventType + String.Format("\n");
if (result.Audio == null || recognizerAudioStatus == null) { //Emulated input
info += String.Format(" Emulated Speech Input\n");
_audioStateLabel.Text = "Audio input state: None";
} else {
if (recognizerAudioStatus.SignalProblem != AudioSignalProblem.None) {
info += String.Format(
"Warning: Signal State is \"{0}\"\n", recognizerAudioStatus.SignalProblem.ToString());
}
info += String.Format(
" Speech Detected at: {0} mSec\n" +
" Candidate Phrase at: {1} mSec\n" +
" Recognizer currently at: {2} mSec\n" +
" Audio Device currently at: {3} mSec\n",
_speechDetectedEventArgs.AudioPosition.TotalMilliseconds,
result.Audio.AudioPosition.TotalMilliseconds,
recognizerAudioStatus.RecognizerPosition.TotalMilliseconds,
recognizerAudioStatus.AudioPosition.TotalMilliseconds);
}
info += String.Format(" Confidence Level: {0}\n", result.Confidence);
if (result.Grammar != null) {
info += String.Format(
" Recognizing Grammar: {0}\n" +
" Recognizing Rule: {1}\n",
((result.Grammar.Name != null) ? (result.Grammar.Name) : "None"),
((result.Grammar.RuleName != null) ? (result.Grammar.RuleName) : "None"));
}
_recognitionEventInfoLabel.Text = info;
}
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
