用自相关法求使信号s均方预测误差为最小的预测系数 已知语音文件求出其LPC系数后，调用a_lsf_conversion.m函数求其对应的LSF 求连续20帧语音的16阶ISF轨迹图-Request by autocorrelation of the signal s mean square prediction error is minimized prediction coefficient Known voice file LPC coefficients obtained its cal