zero_crossing_rate.m

关于双门限法的语音端点检测

function Zn=zero_crossing_rate(xn)
%求各帧的短时过零率
N=size(xn,1);
n=size(xn,2);
for i=1:n
    Zn(i)=floor(1/2*sum(abs(sign(xn(2:N,i))-sign(xn(1:N-1,i)))));
end