SAPI and Windows 7 Problem - windows-7

Question

I'm trying to recognize speech with Windows 7 but it always recognizes a speech as a command or just says "What was that?".
How I can get all speeches?
CODE:
SpeechRecognizer _speechRecognizer;
public Window1()
{
InitializeComponent();
// set up the recognizer
_speechRecognizer = new SpeechRecognizer();
_speechRecognizer.Enabled = false;
_speechRecognizer.SpeechRecognized +=
new EventHandler<SpeechRecognizedEventArgs>(_speechRecognizer_SpeechRecognized); }

Answer 1

Perhaps you want to use the .net System.Speech namespace instead of SAPI? There is a very good article that was published a few years ago at http://msdn.microsoft.com/en-us/magazine/cc163663.aspx. It is probably the best introductory article I’ve found so far. It is a little out of date, but very helfpul. (The AppendResultKeyValue method was dropped after the beta.)
Are you trying to use a shared recognizer? That may be why you are seeing commands. Do you have a specific task for recognition? In that case, you would be better served with a task specific grammar and an inproc recognizer.
If you need to handle any words, use the DictationGrammar that comes with System.Speech. See http://msdn.microsoft.com/en-us/library/system.speech.recognition.dictationgrammar%28VS.85%29.aspx
For fun, I whipped together the simplest .NET windows forms app to use a dictation grammar that I could think of. I created a form. Dropped a button on it and made the button big. Added a reference to System.Speech and the line:
using System.Speech.Recognition;
Then I added the following event handler to button1:
private void button1_Click(object sender, EventArgs e)
{
SpeechRecognitionEngine recognizer = new SpeechRecognitionEngine();
Grammar dictationGrammar = new DictationGrammar();
recognizer.LoadGrammar(dictationGrammar);
try
{
button1.Text = "Speak Now";
recognizer.SetInputToDefaultAudioDevice();
RecognitionResult result = recognizer.Recognize();
button1.Text = result.Text;
}
catch (InvalidOperationException exception)
{
button1.Text = String.Format("Could not recognize input from default aduio device. Is a microphone or sound card available?\r\n{0} - {1}.", exception.Source, exception.Message);
}
finally
{
recognizer.UnloadAllGrammars();
}
}