lpcpf2rr.m

来自「MATLAB工具箱 内容挺丰富」· M 代码 · 共 36 行

function rr=lpcpf2rr(pf,p)
%LPCPF2RR convert power spectrum to autocorrelation coefs RR=(PF,P)
% Note that these will only be accurate if the power spectrum is much longer than p


%      Copyright (C) Mike Brookes 1997
%
%      Last modified Tue May 12 16:20:15 1998
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[nf,p2]=size(pf);
if nargin<2 p=p2-2; end;
ir=irfft(pf.').';
if p>p2-2
  rr=[ir(:,1:p2-1) zeros(nf,p+2-p2)];
else
  rr=ir(:,1:p+1);
end