A speech recognition unit performs speech recognition on input speech based on models, such as HMMs, and supplies a speech recognition result to a dialog management unit. The dialog management unit forms a reply to the speech recognition result. In this case, the dialog management unit detects zones...http://www.google.de/patents/US6879956?utm_source=gb-gplus-sharePatent US6879956 - Speech recognition with feedback from natural language processing for adaptation of acoustic models
