6. A system according to claim 1 , wherein the speech recognizer is configured to determine best token score values repetitively, the speech recognizer is configured to calculate the slope of the best token score values based on at least two best token score values, the speech recognizer is configured to compare the slope to a pre-determined threshold slope value, and the speech recognizer is configured to determine detection of end of utterance if the slope does not exceed the threshold slope value.
7. A system according to claim 6 , wherein the slope is calculated for each frame.