pitch3.m

语音编码中的MELP的经典估计

%sig_in(1:360);resid(1:360)
function [p3,rp3]=pitch3(sig_in,resid,p2,pavg)
%在残差信号中以p2为中心求出最佳的整数基音
p2=round(p2);
[p3,rp3]=pitch2(resid,p2);
if rp3>=0.6
   Dth=0.5;
   if p3<=100
      Dth=0.75;
   end
   [p3,rp3]=double_ck(resid,p3,Dth);
else
   [p3,rp3]=fpr(sig_in,p2);
   if rp3<0.55
      p3=pavg;
   else
      Dth=0.7;
      if p3<=100
         Dth=0.9;
      end
      [p3,rp3]=double_ck(sig_in,p3,Dth);
   end
end
if rp3<0.55
   p3=pavg;
end