1. A method for performing a segmentation operation upon a synthesizing speech signal and an input speech signal, comprising the steps of: generating a synthesized speech signal and a speech element duration signal from said synthesizing speech signal; extracting a first feature parameter from said synthesized speech signal; extracting a second feature parameter from said input speech signal; and performing a dynamic programming matching operation upon said second feature parameter with reference to said first feature parameter and said speech element duration signal to obtain segmentation points of said input speech signal.