说明：  对于清浊音判决的组合系数算法,使用了自相关函数与LPC参数相结合的办法,本代码求出了该算法的判决函数C-coefficent。祥见于俊凤的《基于组合参数的清浊音判决方法》。
(Qingzhuo sound decision for a combination of coefficient algorithm, using the auto-correlation function with the combination of LPC parameters approach, the code of the algorithm to derive decision function C-coefficent. Jun-Feng Xiang in the )