function m=testlpc(x,p)
if nargin<2
    p=12;
end
xx=enframe(x,256,80);
Num=size(xx,1);
%p=12;
lpc1=zeros(Num,p);
lpcc=[];
for i=1:Num
    lpc1(i,:)=lpc3(xx(i,:),p);
    lpcc(i,:)=lpc2lpcc(lpc1(i,:));
end
amp = sum(abs(xx(:,:)'));
m=[lpcc  amp'];
%一階差分；