问题与传递给lpc函数的订单有关. 2 + fs / 1000其中fs是采样频率是根据以下经验法则:

The problem had to do with the order being passed to the lpc function. 2 + fs / 1000 where fs is the sampling frequency is the rule of thumb according to:

http://www.phon.ucl.ac. uk/courses/spsci/matlab/lect10.html