How to use Speech Recognition within a Visual Basic .NET application
This page provides a tutorial for the use of the Windows speech recognition engine from within a Visual Basic application.
1. A "Yes-No-Maybe" application
Create a Windows Forms application. Give the application three labels: LabelYes, LabelNo and LabelMaybe. Initialise these to a large font and a light-gray colour:
2. Reference the System.Speech component
Use Project|Add Reference to add a reference to the System.Speech component:
3. Recognition code
Add this code to the form:
Imports System.Speech.Recognition
Imports System.Threading
Imports System.Globalization
Public Class Form1
' recogniser & grammar
Dim recog As New SpeechRecognizer
Dim gram As Grammar
' events
Public Event SpeechRecognized As _
EventHandler(Of SpeechRecognizedEventArgs)
Public Event SpeechRecognitionRejected As _
EventHandler(Of SpeechRecognitionRejectedEventArgs)
' word list
Dim wordlist As String() = New String() {"Yes", "No", "Maybe"}
' word recognised event
Public Sub recevent(ByVal sender As System.Object, _
ByVal e As RecognitionEventArgs)
LabelYes.ForeColor = Color.LightGray
LabelNo.ForeColor = Color.LightGray
LabelMaybe.ForeColor = Color.LightGray
If (e.Result.Text = "Yes") Then
LabelYes.ForeColor = Color.Blue
ElseIf (e.Result.Text = "No") Then
LabelNo.ForeColor = Color.Blue
ElseIf (e.Result.Text = "Maybe") Then
LabelMaybe.ForeColor = Color.Blue
End If
End Sub
' recognition failed event
Public Sub recfailevent(ByVal sender As System.Object, _
ByVal e As RecognitionEventArgs)
LabelYes.ForeColor = Color.LightGray
LabelNo.ForeColor = Color.LightGray
LabelMaybe.ForeColor = Color.LightGray
End Sub
' form initialisation
Private Sub Form1_Load(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles MyBase.Load
' need these to get British English rather than default US
Thread.CurrentThread.CurrentCulture = New CultureInfo("en-GB")
Thread.CurrentThread.CurrentUICulture = New CultureInfo("en-GB")
' convert the word list into a grammar
Dim words As New Choices(wordlist)
gram = New Grammar(New GrammarBuilder(words))
recog.LoadGrammar(gram)
' add handlers for the recognition events
AddHandler recog.SpeechRecognized, AddressOf Me.recevent
AddHandler recog.SpeechRecognitionRejected, AddressOf Me.recfailevent
' enable the recogniser
recog.Enabled = True
End Sub
End Class
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4. Run the application
When the application starts the Windows speech recognition system will be loaded. You will need to say "Start Listening" or to click on the microphone icon to start recognition.
Then when you say "yes", "no" or "maybe", the appropriate label will light up. If you say anything else, the labels should turn back to grey.
To improve recognition, you should set up the speech recognition system for your microphone, environment and your voice using the Speech Recognition applet in the Control Panel.
Artikel VB.NET :: Belajar membuat Speech Recognition, Diterbitkan oleh scodeaplikasi pada Kamis, 28 Juli 2016. Semoga artikel ini dapat menambah wawasan Anda. Website ini dipost dari beberapa sumber, bisa cek disini sumber, Sobat diperbolehkan mengcopy paste / menyebar luaskan artikel ini, karena segala yang dipost di public adalah milik public. Bila Sobat tertarik Ingin membuat software, membeli software,
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