说明：  MATALAB功能强大且编程方便，广泛应用于各种算法的性能评估。文章简要 介绍了LSF声道滤波器原理，给出了用MATLAB实现LSF滤波器的流程图和程序代码。
(MATALAB powerful programming convenience, which are widely used algorithms performance evaluation. The article briefed the LSF channel filter principle, given MATLAB LSF filter the flow chart and code.)