Csharp: speech to text, text to speech in win

Using System; using System. collections. generic; using System. componentModel; using System. data; using System. drawing; using System. linq; using System. text; using System. windows. forms; using System. threading; using SpeechLib; // NET2.0 references that the Microsoft Speech object library Reference of the Speech sdk 5.1 in the COM tab already has Version 11.0 using System. speech; using System. speech. recognition; using System. speech. synthesis; namespace Speech {// <summary> // 20140427 // tu juwen ///// </summary> public partial class Form1: form {private enum State {Idle = 0, Accepting = 1, Off = 2,} private State RecogState = State. off; private SpeechRecognitionEngine recognizer; private SpeechSynthesizer synthesizer = null; private int Hypothesized = 0; private int Recognized = 0; /// <summary> ///// </summary> public Form1 () {InitializeComponent ();} /// <summary> //// </summary> /// <param name = "sender"> </param> /// <param name = "e "> </param> private void Form1_Load (object sender, eventArgs e) {// SpVoice voice = new SpVoice (); // SAPI 5.4 // SpeechLib. ISpeechObjectTokens obj = voice. getVoices (string. empty, string. empty); // int count = obj. count; // obtain the total number of voice libraries // bool result = false; // for (int I = 0; I <count; I ++) // {// string desc = obj. item (I ). getDescription (I );//. getDescription (); // traverse the voice library // comboBox1.Items. add (desc); // SpVoiceClass voice = new SpVoiceClass (); // SAPI 5.1 // voice. voice = voice. getVoices (string. empty, string. empty ). item (0); // voice. speak ("what you want to say", SpeechVoiceSpeakFlags. SVSFlagsAsync); // SpVoice voice1 = new SpVoice (); // SAPI 5.4 // voice1.Volume = 100; // volume // voice1.Voice = voice1.GetVoices (string. empty, string. empty ). item (0); // voice1.Rate = 2; // Speed Speech reading speed // voice1.Speak ("what you want to say", SpeechVoiceSpeakFlags. SVSFlagsAsync); // voice1.Speak ("speech sdk 5.1", SpeechVoiceSpeakFlags. SVSFlagsAsync); // SpeechSynthesizer syn = new SpeechSynthesizer (); // syn. selectVoice ("Microsoft Lili"); // initialize recognizer and synthesizer evaluate (); // if input device found then proceed if (SelectInputDevice () {LoadDictationGrammar (); readAloud ("People's Republic of China "); // Speech Engine Ready for Input in Chinese format }/// <summary> /// Chinese // </summary> /// <param name = "sender"> </param> // <param name = "e"> </param> private void button#click (object sender, eventArgs e) {SpVoiceClass voice = new SpVoiceClass (); voice. voice = voice. getVoices (string. empty, string. empty ). item (0); // 0, which is the default value of voice. speak (this. textBox1.Text. trim (), SpeechVoiceSpeakFlags. SVSFlagsAsync );} /// <summary> // english // </summary> /// <param name = "sender"> </param> /// <param name =" e "> </param> private void button2_Click (object sender, eventArgs e) {SpVoiceClass voice = new SpVoiceClass (); voice. voice = voice. getVoices (string. empty, string. empty ). item (1); // voice. speak (this. textBox2.Text. trim (), SpeechVoiceSpeakFlags. SVSFlagsAsync );} /// <summary> /// input Chinese speech and output Chinese Text /// </summary> /// <param name = "sender"> </param> /// <param name = "e"> </param> private void button3_Click (object sender, eventArgs e) {switch (RecogState) {case State. off: RecogState = State. accepting; button3.Text = "Stop"; recognizer. recognizeAsync (RecognizeMode. multiple); break; case State. accepting: RecogState = State. off; button3.Text = "Start"; recognizer. recognizeAsyncStop (); break ;}} /// <summary> /// pause recognition and speak the text sent /// </summary> /// <param name = "speakText"> </param> public void readAloud (string speakText) {try {recognizer. recognizeAsyncCancel (); synthesizer. speakAsync (speakText );} catch {}}// <summary> // initialize recognizer and synthesizer along with their events // </summary> private void InitializeRecognizerSynthesizer () {var selectedRecognizer = (from e in SpeechRecognitionEngine. installedRecognizers () where e. culture. equals (Thread. currentThread. currentCulture) select e ). firstOrDefault (); recognizer = new SpeechRecognitionEngine (selectedRecognizer); recognizer. audioStateChanged + = new EventHandler <AudioStateChangedEventArgs> (recognizer_AudioStateChanged); recognizer. speechHypothesized + = new EventHandler <SpeechHypothesizedEventArgs> (recognizer_SpeechHypothesized); recognizer. speechRecognized + = new EventHandler <identifier> (identifier); synthesizer = new SpeechSynthesizer () ;}# region Recognizer events private void identifier (object sender, identifier e) {switch (e. audioState) {case AudioState. speech: LabelStatus. text = "Listening"; break; case AudioState. silence: LabelStatus. text = "Idle"; break; case AudioState. stopped: LabelStatus. text = "Stopped"; break ;}} /// <summary> //// </summary> /// <param name = "sender"> </param> /// <param name = "e "> </param> private void recognizer_SpeechHypothesized (object sender, speechHypothesizedEventArgs e) {Hypothesized ++; LabelHypothesized. text = "Hypothesized:" + Hypothesized. toString ();} /// <summary> //// </summary> /// <param name = "sender"> </param> /// <param name = "e "> </param> private void recognizer_SpeechRecognized (object sender, speechRecognizedEventArgs e) {Recognized ++; string s = "Recognized:" + Recognized. toString (); if (RecogState = State. off) return; float accuracy = (float) e. result. confidence; string phrase = e. result. text; {if (phrase = "End Dictate") {RecogState = State. off; recognizer. recognizeAsyncStop (); ReadAloud ("Dictation Ended"); return;} textBox1.AppendText ("" + e. result. text );}} # endregion // <summary> // select input device if available /// </summary> // <returns> </returns> private bool SelectInputDevice () {bool proceedLoading = true; // if OS is abve XP if (IsOscompatible () {try {recognizer. setinputtodefaauaudiodevice ();} catch {proceedLoading = false; // no audio input device }}// if OS is XP or below else ThreadPool. queueUserWorkItem (InitSpeechRecogniser); return proceedLoading;} // <summary> // Findout if OS is compatible. /// </summary> /// <returns> true if greater than XP otherwise false </returns> private bool IsOscompatible () {OperatingSystem osInfo = Environment. OSVersion; if (osInfo. version> new Version ("6.0") return true; else return false ;} /// <summary> ///// </summary> /// <param name = "o"> </param> private void InitSpeechRecogniser (object o) {recognizer. setinputtodefaauaudiodevice ();} // <summary> // Load grammars, one for command and other for dictation // </summary> private void LoadDictationGrammar () {GrammarBuilder grammarBuilder = new GrammarBuilder (); grammarBuilder. append (new Choices ("End Dictate"); Grammar commandGrammar = new Grammar (grammarBuilder); commandGrammar. name = "main command grammar"; recognizer. loadGrammar (commandGrammar); DictationGrammar dictationGrammar = new DictationGrammar (); dictationGrammar. name = "dictation"; recognizer. loadGrammar (dictationGrammar );}}}