riconoscimento vocale e lingua grammatica

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luigi Posted: 01-22-2010 20.50

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Salve, prendento spunto da questo articolo :

http://blogs.ugidotnet.org/marcom/archive/2008/04/22/92310.aspx

Mi aiutereste ad risolvere ad questo programma.

http://blogs.msdn.com/robertbrown/archive/2005/06/14/speech-sample-in-vb-net.aspx

Imports System.Speech
Imports System.Speech.Recognition.SrgsGrammar

Public Class Form1

    Dim WithEvents reco As New Recognition.SpeechRecognizer

    Private Sub SetColor(ByVal color As System.Drawing.Color)

        Dim synth As New Synthesis.SpeechSynthesizer

        synth.SpeakAsync("setting the back color to " + color.ToString)

        Me.BackColor = color

    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Dim gram As New SrgsDocument

        Dim colorRule As New SrgsRule("color")

        Dim colorsList As New SrgsOneOf("red", "green")

        colorRule.Add(colorsList)

        gram.Rules.Add(colorRule)

        gram.Root = colorRule

        reco.LoadGrammar(New Recognition.Grammar(gram))

    End Sub

    Private Sub reco_SpeechRecognized(ByVal sender As Object, ByVal e As System.Speech.Recognition.RecognitionEventArgs) Handles reco.SpeechRecognized

        Select Case e.Result.Text

            Case "red"

                SetColor(Color.Red)

            Case "green"

                SetColor(Color.Green)
                MessageBox.Show("Scelto Green")

        End Select

    End Sub

End Class

Grazie mille.

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Marco Minerva replied on 01-25-2010 9.24

rated by 0 users

Ciao!

Il tuo problema è modificare l'esempio che hai riportato perché sia possibile impostare la lingua della grammatica? Qual è il punto che ti crea problemi?

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luigi replied on 02-09-2010 21.52

rated by 0 users

Ciao, ora, con questo codice:

using System;
using System.Speech;
using System.Speech.Recognition;
using System.Threading;
using System.Diagnostics;
using System.Globalization;

namespace SpeechTest
{
    class Program
    {

        static void Main(string[] args)
        {
            EnumerateEngines();
            args = CheckArguments(args);

            CommandListener listener = new CommandListener();
            listener.SetCommands(args);
            listener.Run();
        }

        private static string[] CheckArguments(string[] args)
        {
            if (args.Length == 0)
            {
                Console.WriteLine("Setting up default words. Enter your own words via command line arguments");
                args = new string[] { "music", "word" };
            }

            Console.Write("Now listening for...");
            foreach (string word in args)
            {
                Console.Write(String.Format("'{0}', ", word));
            }
            Console.WriteLine("\r\n(Press a key to stop listening)");
            return args;
        }

        private static void EnumerateEngines()
        {
            Console.WriteLine("The following engines are available");
            foreach (RecognizerInfo config in SpeechRecognitionEngine.InstalledRecognizers())
            {
                Console.WriteLine(config.Name + " " + config.Description);
            }
        }
    }

    class CommandListener
    {
        SpeechRecognitionEngine _speechRecogniser;
        public CommandListener()
        {
            _speechRecogniser = new SpeechRecognitionEngine();
            _speechRecogniser.SetInputToDefaultAudioDevice();

            _speechRecogniser.SpeechDetected += new EventHandler<SpeechDetectedEventArgs>(_speechRecogniser_SpeechDetected);
            _speechRecogniser.SpeechHypothesized += new EventHandler<SpeechHypothesizedEventArgs>(_speechRecogniser_SpeechHypothesized);
            _speechRecogniser.SpeechRecognitionRejected += new EventHandler<SpeechRecognitionRejectedEventArgs>(_speechRecogniser_SpeechRecognitionRejected);
            _speechRecogniser.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(_speechRecogniser_SpeechRecognized);
            _speechRecogniser.AudioStateChanged += new EventHandler<AudioStateChangedEventArgs>(_speechRecogniser_AudioStateChanged);
            _speechRecogniser.AudioSignalProblemOccurred += new EventHandler<AudioSignalProblemOccurredEventArgs>(_speechRecogniser_AudioSignalProblemOccurred);

            NotifyEvent("Loaded default engine - {0}", _speechRecogniser.RecognizerInfo.Name);
        }

        #region Event Handlers
        void _speechRecogniser_AudioSignalProblemOccurred(object sender, AudioSignalProblemOccurredEventArgs e)
        {
            NotifyEvent("Audio problem {0}", e.AudioSignalProblem.ToString("G"));
        }

        void _speechRecogniser_AudioStateChanged(object sender, AudioStateChangedEventArgs e)
        {
            NotifyEvent("Audio state now {0}", e.AudioState.ToString("G"));
        }

        void _speechRecogniser_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
        {
            NotifyEvent("Recognized '{0}' at {1} seconds", e.Result.Text, e.Result.Audio.AudioPosition);
        }

        void _speechRecogniser_SpeechRecognitionRejected(object sender, SpeechRecognitionRejectedEventArgs e)
        {
            NotifyEvent("RecognitionRejected '{0}' at {1} seconds", e.Result.Text, e.Result.Audio.AudioPosition);
        }

        void _speechRecogniser_SpeechHypothesized(object sender, SpeechHypothesizedEventArgs e)
        {

            NotifyEvent("Hypothesized '{0}' at seconds", e.Result.Text);
        }

        void _speechRecogniser_SpeechDetected(object sender, SpeechDetectedEventArgs e)
        {
            NotifyEvent("Detected speech at {0} seconds", e.AudioPosition.TotalSeconds);
        }
        #endregion

        public void SetCommands(string[] commands)
        {
            GrammarBuilder grammarBuilder = new GrammarBuilder();

            grammarBuilder.Culture = _speechRecogniser.RecognizerInfo.Culture;
            grammarBuilder.Append(new Choices(commands));
            Grammar grammar = new Grammar(grammarBuilder);

            _speechRecogniser.UnloadAllGrammars();
            _speechRecogniser.LoadGrammar(grammar);

            _speechRecogniser.RecognizeAsync(RecognizeMode.Multiple);
        }

        public void Run()
        {
            while (!Console.KeyAvailable)
            {
                Thread.Sleep(100);
            }

            _speechRecogniser.Dispose();
        }

        private static void NotifyEvent(string format, params object[] args)
        {
            Console.WriteLine(string.Format(format, args));
        }
    }
}

Ecco l'errore:

The following engines are available
Setting up default words. Enter your own words via command line arguments
Now listening for...'music', 'word',
(Press a key to stop listening)

Eccezione non gestita: System.PlatformNotSupportedException: Nessun riconoscimen
to installato.
   in System.Speech.Recognition.RecognizerBase.Initialize(SapiRecognizer recogni
zer, Boolean inproc)
   in System.Speech.Recognition.SpeechRecognitionEngine.get_RecoBase()
   in System.Speech.Recognition.SpeechRecognitionEngine.SetInputToDefaultAudioDe
vice()
   in SpeechTest.CommandListener..ctor() in C:\Users\luigi\AppData\Local\Tempora
ry Projects\SpeechTest\Program.cs:riga 56
   in SpeechTest.Program.Main(String[] args) in C:\Users\luigi\AppData\Local\Tem
porary Projects\SpeechTest\Program.cs:riga 18
Premere un tasto per continuare . . .

---------------------

Sono su windows vista ita 32bit home premium.

Reply

Matteo Baglini replied on 02-10-2010 10.28

rated by 0 users

Io credo che il problema sia legato alla lingua del sistema operativo in quanto la Speech Recognition di Windows funziona solo per la lingua inglese.

Di fatto non hai nessun SpeechRecognitionEngine installato, come dimostra la chiamata al metodo EnumerateEngines.

Un consiglio che ti posso dare è quello di installare l'ultima versione del Windows SDK il quale contiene numerosi esempi di utilizzo delle Speech API.

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Marco Minerva replied on 02-10-2010 11.48

rated by 0 users

Confermo: il riconoscimento vocale è incluso solo nelle inglese, francese, tedesco, spagnolo, cinese e giapponese di Windows Vista.