语音合成与识别

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Matlab

c5_filterrex1.m：源码内容

							n=40;
order=4; %filter order
[b,a]=butter(order,0.1);%prototype
%
%The following segment is the block processing implementation
%
int1=[1,zeros(1,n-1)];%input vector
out1=filter(b,a,int1);%output vector
%
%the following segment is the sample-by-sample implementation
%
sreg=zeros(1,order+1);
for k=1:n
    if k==1
        in=1;
    else
        in=0;
    end
    out=b(1)*in+sreg(1,1);%determine output
    sreg=in*b-out*a+sreg;%update register
    sreg=[sreg(1,2:(order+1)),0];%shift
    out2(k)=out;%create output vector
end
%
subplot(2,1,1)
index=0:n-1;
stem(index,out1)
xlabel('Sample Index')
ylabel('Block Processing')
subplot(2,1,2)
index=0:n-1;
stem(index,out2)
xlabel('Sample Index')
ylabel('Serial Processing')
%End of script file

						