RecognitionResult Class
Represents the result of recognition engine on audio input as detailed information about the best candidate phrases matching phrase, and a list of all candidate matching phrases.
Assembly: System.Speech (in System.Speech.dll)
An instance of RecognitionResult returned by a speech recognition operation provides both:
-
Detailed information about the phrase determined by to be the best candidate for matching audio input.
-
A list of all candidate phrases, as RecognizedPhrase objects, ordered by confidence level, and obtained by the Alternates member of [T:System.Speech.Recognition.RecognitionResult.]
RecognitionResult inherits from RecognizedPhrase and is serializable and
An application typically obtains an instance of RecognitionResult from the Result member of the instance of a class derived from RecognitionEventArgs and passed by a speech recognition engine to handlers of SpeechHypothesized, SpeechRecognized or SpeechRecognitionRejected events generated by SpeechRecognizer and SpeechRecognitionEngine, as well as SpeechRecognized events generated byGrammar.
The example below use an instance of RecognitionResult to display information about the results of a speech recognition operation.
// Displays the semantics, rules, and alternates of the result.
private void DisplayResult(RecognitionEventArgs eventArgs)
{
// Clear results, semantic XML, semantics tree, and alternates.
_recognitionSmlBrowser.Navigate("about:blank");
_semanticsTreeView.Nodes.Clear();
_alternatesListBox.Items.Clear();
_recognitionInfo.Text = null;
_recognizedTextDisplay.Text = null;
//Obtain result from RecognitionEventArg passed in.
if (eventArgs != null && eventArgs.Result != null)
{
RecognitionResult result = eventArgs.Result;
//Set Text color on the basis of the event type passed in.
_recognitionInfo.Text = null;
switch (eventArgs.GetType().ToString())
{
case "System.Speech.Recognition.SpeechHypothesizedEventArgs":
_recognizedTextDisplay.ForeColor = Color.Black;
_recognizedTextDisplay.Text = result.Text;
_recognitionInfo.Text = null;
break;
case "System.Speech.Recognition.SpeechRecognitionRejectedEventArgs":
_recognizedTextDisplay.ForeColor = Color.OrangeRed;
_recognizedTextDisplay.Text ="Unable to Recognize Input";
DisplaySemanticsSML(result);
DisplaySemanticsTreeView(result);
_recognitionInfo.Text = null;
break;
case "System.Speech.Recognition.SpeechRecognizedEventArgs":
_recognizedTextDisplay.ForeColor = Color.Green;
_recognizedTextDisplay.Text = result.Text;
_recognitionInfo.Text =
"Confidence Level: " + result.Confidence + Environment.NewLine
+ "Recognizing Grammar: " + result.Grammar.Name + Environment.NewLine
+ ((result.Grammar.RuleName != null) ? ("Recognizing Rule : " + result.Grammar.RuleName) : "");
DisplaySemanticsSML(result);
DisplaySemanticsTreeView(result);
break;
default:
_recognizedTextDisplay.ForeColor = Color.Black;
break;
}
_recognizedTextDisplay.Show();
_recognitionInfo.Show();
DisplayAlternates(result);
}
}
System.Speech.Recognition.RecognizedPhrase
System.Speech.Recognition.RecognitionResult
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.
