countoverzeroing.m

倒谱法检测基音周期

function zcr=countoverzeroing(x,FrameLen,inc)
en=length(x);
tmp1  = enframe(x(1:en-1), FrameLen,inc);
tmp2  = enframe(x(2:en)  , FrameLen,inc);
%错位分帧
signs = (tmp1.*tmp2)<0;%两点异号，signs＝1
diffs = (tmp1 -tmp2)>0.02;%两点差值大于0.02，diffs =1
zcr   = sum(signs.*diffs,2);