from win32com.client import constantsimport win32com.clientimport pythoncom"""Sample code for using the Microsoft Speech SDK 5.1 via COM in Python. Requires that the SDK be installed; it's a free download from http://microsoft.com/speech and that MakePy has been used on it (in PythonWin, select Tools | COM MakePy Utility | Microsoft Speech Object Library 5.1). After running this, then saying "One", "Two", "Three" or "Four" should display "You said One" etc on the console. The recognition can be a bit shaky at first until you've trained it (via the Speech entry in the Windows Control Panel."""class SpeechRecognition: """ Initialize the speech recognition with the passed in list of words """ def __init__(self, wordsToAdd): # For text-to-speech self.speaker = win32com.client.Dispatch("SAPI.SpVoice") # For speech recognition - first create a listener self.listener = win32com.client.Dispatch("SAPI.SpSharedRecognizer") # Then a recognition context self.context = self.listener.CreateRecoContext() # which has an associated grammar self.grammar = self.context.CreateGrammar() # Do not allow free word recognition - only command and control # recognizing the words in the grammar only self.grammar.DictationSetState(0) # Create a new rule for the grammar, that is top level (so it begins # a recognition) and dynamic (ie we can change it at runtime) self.wordsRule = self.grammar.Rules.Add("wordsRule", constants.SRATopLevel + constants.SRADynamic, 0) # Clear the rule (not necessary first time, but if we're changing it # dynamically then it's useful) self.wordsRule.Clear() # And go through the list of words, adding each to the rule [ self.wordsRule.InitialState.AddWordTransition(None, word) for word in wordsToAdd ] # Set the wordsRule to be active self.grammar.Rules.Commit() self.grammar.CmdSetRuleState("wordsRule", 1) # Commit the changes to the grammar self.grammar.Rules.Commit() # And add an event handler that's called back when recognition occurs self.eventHandler = ContextEvents(self.context) # Announce we've started using speech synthesis self.say("Started successfully") """Speak a word or phrase""" def say(self, phrase): self.speaker.Speak(phrase)"""The callback class that handles the events raised by the speech object. See "Automation | SpSharedRecoContext (Events)" in the MS Speech SDK online help for documentation of the other events supported. """class ContextEvents(win32com.client.getevents("SAPI.SpSharedRecoContext")): """Called when a word/phrase is successfully recognized - ie it is found in a currently open grammar with a sufficiently high confidence""" def OnRecognition(self, StreamNumber, StreamPosition, RecognitionType, Result): newResult = win32com.client.Dispatch(Result) print "You said: ",newResult.PhraseInfo.GetText() if __name__=='__main__': wordsToAdd = [ "One", "Two", "Three", "Four" , "boom"] speechReco = SpeechRecognition(wordsToAdd) while 1: pythoncom.PumpWaitingMessages()
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