8. A system according to claim 6 , wherein the speech recognizer is further configured to compare the number of slopes exceeding the threshold slope value to a predetermined minimum number of slopes exceeding the threshold slope value, and the speech recognizer is configured to determine detection of end of utterance if the number of best state score sums exceeding the threshold slope value is the same or larger than the predetermined minimum number.
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.