RecognizedWordUnit Class

Definition

Namespace:

System.Speech.Recognition

Assembly:

System.Speech.dll

Package:

System.Speech v10.0.0-preview.1.25080.5

Source:

RecognizedWordUnit.cs

Provides the atomic unit of recognized speech.

public class RecognizedWordUnit

Inheritance

Object

RecognizedWordUnit

Examples

The following example shows a utility routine (stringFromWordArray) that generates strings. The strings contain lexical output (using LexicalForm), normalized text (using Text), or phonetic characters from the International Phonetic Alphabet (using Pronunciation). Strings are formatted using DisplayAttributes objects obtained from the DisplayAttributes property from a ReadOnlyCollection<T> of RecognizedWordUnit objects. The RecognizedWordUnit objects are obtained from the Words property on the RecognizedPhrase object.

internal enum WordType
{
  Text,
  Normalized = Text,
  Lexical,
  Pronunciation
}

internal static string stringFromWordArray(ReadOnlyCollection<RecognizedWordUnit> words, WordType type)
{
  string text = "";
  foreach (RecognizedWordUnit word in words)
  {
    string wordText = "";
    if (type == WordType.Text || type == WordType.Normalized)
    {
      wordText = word.Text;
    }
    else if (type == WordType.Lexical)
    {
      wordText = word.LexicalForm;
    }
    else if (type == WordType.Pronunciation)
    {
      wordText = word.Pronunciation;
    }
    else
    {
      throw new InvalidEnumArgumentException(String.Format("[0}: is not a valid input", type));
    }
    // Use display attribute

    if ((word.DisplayAttributes & DisplayAttributes.OneTrailingSpace) != 0)
    {
      wordText += " ";
    }
    if ((word.DisplayAttributes & DisplayAttributes.TwoTrailingSpaces) != 0)
    {
      wordText += "  ";
    }
    if ((word.DisplayAttributes & DisplayAttributes.ConsumeLeadingSpaces) != 0)
    {
      wordText = wordText.TrimStart();
    }
    if ((word.DisplayAttributes & DisplayAttributes.ZeroTrailingSpaces) != 0)
    {
      wordText = wordText.TrimEnd();
    }

    text += wordText;

  }
  return text;
}

Remarks

All results returned by a recognition engine are constructed of RecognizedWordUnit objects.

An array of RecognizedWordUnit objects is accessible for any recognition operation through the Words property on the RecognizedPhrase object.

In addition to providing a measure of recognition certainty (Confidence) a RecognizedWordUnit instance provides:

• Normalized and exact (or lexical) text representations for a recognized word. For more information, see ReplacementText, Text, and LexicalForm.

• Pronunciation information using characters from a supported phonetic alphabet, such as the International Phonetic Alphabet (IPA) or the Universal Phone Set (UPS). For more information see Pronunciation.

• Formatting for printing. For more information see the DisplayAttributes class and its DisplayAttributes property.

Constructors

RecognizedWordUnit(String, Single, String, String, DisplayAttributes, TimeSpan, TimeSpan)

Initializes a new instance of the RecognizedWordUnit class.

Properties

Confidence	Gets a value, assigned by the recognizer, that represents the likelihood that a recognized word matches a given input.
DisplayAttributes	Gets formatting information used to create the text output from the current RecognizedWordUnit instance.
LexicalForm	Gets the unnormalized text of a recognized word.
Pronunciation	Gets the phonetic spelling of a recognized word.
Text	Gets the normalized text for a recognized word.

Applies to

See also

• DisplayAttributes