Question

语音信号的分帧加窗的matlab实现

Answer 1

[x,fs,nbits]=wavread('5_1.wav');
x1=enframe(x,200,100);%·分帧
x2=enframe(x,hamming(200),100);%í给一帧添加汉明窗
figure;%画图
subplot(2,1,1),plot(x1(50,:))
figure
subplot(2,1,2),plot(x2(50,:))
这只是分一帧，给一帧加窗

Answer 2

function Seg=segment(signal,W,SP,Window)

if nargin<3
SP=.4;
end
if nargin<2
W=256;
end
if nargin<4
Window=hamming(W);
end
Window=Window(:); %make it a column vector

L=length(signal);
SP=fix(W.*SP);
N=fix((L-W)/SP +1); %number of segments

Index=(repmat(1:W,N,1)+repmat((0:(N-1))'*SP,1,W))';
hw=repmat(Window,1,N);
Seg=signal(Index).*hw;