7. The speech recognition system of claim 6 , wherein the end point detection unit detects the start and end points by calculating end point detection features of ten or more frames in the signal output from the first speech enhancement unit or the second speech enhancement unit and comparing a sum of the calculated end point detection features with a threshold.
6. The speech recognition system of claim 1 , further comprising an end point detection unit for detecting start and end points of the speech signal output from the first speech enhancement unit or the second speech enhancement unit.