1. A method for enrollment of speaker authentication, comprising: extracting an acoustic feature vector sequence from an enrollment utterance of a speaker; and generating a speaker template using the acoustic feature vector sequence; wherein said step of extracting an acoustic feature vector sequence comprises: generating a filter-bank for the enrollment utterance of the speaker for filtering locations and energies of formants in the spectrum of the enrollment utterance based on the enrollment utterance; filtering the spectrum of the enrollment utterance by the generated filter-bank; and generating the acoustic feature vector sequence from the filtered enrollment utterance, wherein said step of generating a filter-bank for the enrollment utterance comprises: LPC-analyzing each frame in the enrollment utterance to obtain an LPC coefficient vector of the frame; LSP-analyzing the obtained LPC coefficient vector of each frame to obtain line spectrum pairs (LSP) of the frame; and combining the LSPs of all frames in the enrollment utterance as the filter-bank for the enrollment utterance.