Conversational dialog with a computer or other processor-based device without requiring push-to-talk functionality. In one embodiment, a computer-implemented method first determines that a user desires to engage in a dialog. Based thereon the method turns on a speech recognition functionality for a period...http://www.google.com.tw/patents/US6434527?utm_source=gb-gplus-share專利 US6434527 - Signalling and controlling the status of an automatic speech recognition system for use in handsfree conversational dialogue
