/// <summary>
/// Speech recognized handler
/// </summary>
/// <param name="recognized"></param>
private void SpeechRecognizedHandler(sr.SpeechRecognized recognized)
{
TimeSpan sinceTalk = DateTime.Now - Talker.lastSpoken;
if (sinceTalk.TotalSeconds < SpeechRecognizerTalkerBlackoutSec)
{
Tracer.Trace("SpeechRecognizedHandler in blackout at " + sinceTalk.TotalSeconds + " sec");
return;
}
int angle = Direction.to180fromRad(-recognized.Body.Angle);
string commandText = recognized.Body.Text;
string commandSemantics = recognized.Body.Semantics.ValueString;
double confidence = Math.Round(recognized.Body.Confidence, 3); // 0 to 1, usually around 0.97 for successfully recognized commands
//Tracer.Trace("**************************************** SpeechRecognizedHandler **************************************** ");
//Tracer.Trace("speech '" + commandText + "'=>'" + commandSemantics + "' at " + angle + " degrees, confidence " + confidence);
// find the handler based on semantics:
SpeechRecognizerDictionaryItem srdi = (from di in speechRecognizerDictionary
where di.semantics == commandSemantics
select di).FirstOrDefault();
// usually Confidence is 0.95-0.99
if (srdi != null && recognized.Body.Confidence > srdi.minimumRequiredConfidence)
{
VoiceCommandState state = _state.VoiceCommandState;
state.TimeStamp = DateTime.Now;
state.Text = commandText;
state.Semantics = commandSemantics;
state.ConfidencePercent = (int)Math.Round(confidence * 100.0f);
state.Direction = angle;
LogHistory(1, "speech '" + commandText + "'=>'" + commandSemantics + "' at " + angle + " deg, " + confidence);
// now call the handler:
srdi.handler(srdi, angle);
}
else if (confidence > 0.5d)
{
LogHistory(3, "rejected '" + commandText + "'=>'" + commandSemantics + "' at " + angle + " deg, " + confidence);
Talker.Say(10, "Homm"); // not enough confidence
}
//setPan(angle);
//setTilt(0);
}
