1. A computerized method of performing speech recognition comprising: receiving, at a computer, a command input from a user, the command input to cause starting of speech recognition; responding to the command input from the user to start speech recognition by turning large vocabulary speech recognition on after the receipt of the command; and subsequently automatically turning the large vocabulary speech recognition off and leaving it off until receipt, at the computer, of another command input from a user to start the speech recognition; wherein the turning off of the large vocabulary speech recognition occurs automatically in response to the first end of utterance detected after said turning on of the large vocabulary speech recognition.