RecognitionResult Class

This class derives from RecognizedPhrase and provides detailed information about speech recognition, including the following:

• The Grammar property references the Grammar that the recognizer used to identify the speech.

• The Text property contains the normalized text for the phrase. For more information about text normalization, see ReplacementText.

• The Semantics property references the semantic information contained in the result. The semantic information is a dictionary of the key names and associated semantic data.

• The Alternates property contains a collection of RecognizedPhrase objects that represent other candidate interpretations of the audio input. See Alternates for additional information.

• The Words property contains an ordered collection of RecognizedWordUnit objects that represent each recognized word in the input. Each RecognizedWordUnit contains display format, lexical format, and pronunciation information for the corresponding word.

Certain members of the SpeechRecognitionEngine, SpeechRecognizer, and Grammar classes can generate a RecognitionResult. For more information, see the following methods and events.

• Methods and events of the SpeechRecognitionEngine class:

  • EmulateRecognize

  • EmulateRecognizeAsync

  • SpeechHypothesized

  • SpeechRecognitionRejected

  • SpeechRecognized

• Methods and events of the SpeechRecognizer class:

  • EmulateRecognize

  • EmulateRecognizeAsync

  • SpeechHypothesized

  • SpeechRecognitionRejected

  • SpeechRecognized

• The SpeechRecognized event of the Grammar class.

For more information about recognition events, see Using Speech Recognition Events.

The following example shows a handler for the SpeechRecognized event of a SpeechRecognitionEngine or SpeechRecognizer object, and some of the information about the associated RecognitionResult.

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

  // Add event handler code here.

  // The following code illustrates some of the information available
  // in the recognition result.
  Console.WriteLine("Grammar({0}), {1}: {2}",
    e.Result.Grammar.Name, e.Result.Audio.Duration, e.Result.Text);

  // Display the semantic values in the recognition result.
  foreach (KeyValuePair<String, SemanticValue> child in e.Result.Semantics)
  {
    Console.WriteLine(" {0} key: {1}",
      child.Key, child.Value.Value ?? "null");
  }
  Console.WriteLine();

  // Display information about the words in the recognition result.
  foreach (RecognizedWordUnit word in e.Result.Words)
  {
    RecognizedAudio audio = e.Result.GetAudioForWordRange(word, word);
    Console.WriteLine(" {0,-10} {1,-10} {2,-10} {3} ({4})",
      word.Text, word.LexicalForm, word.Pronunciation,
      audio.Duration, word.DisplayAttributes);
  }

  // Display the recognition alternates for the result.
  foreach (RecognizedPhrase phrase in e.Result.Alternates)
  {
    Console.WriteLine(" alt({0}) {1}", phrase.Confidence, phrase.Text);
  }
}

.NET Framework

.NET Framework Client Profile

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference