Time delay for time domain function?

Question

ckchew 2011-7-2

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https://ww2.mathworks.cn/matlabcentral/answers/10742-time-delay-for-time-domain-function

Hellow there everyone...i am new to matlab and i have some enquiry regarding time delay...let's say i have a .wav file which consists of my voice (will be using wavread to read the wav file). is there any way i can implement a time delay like for instance:

original signal s(t) delayed version s(t-T), where T=delay

any ideas for implementing s(t-T)? any help or advice will be greatly appreciated!

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Answer 1

Rick Rosson 2011-7-2

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在 MATLAB Online 中打开

Please try the following:

filename = 'myvoice.wav';
[ x Fs ] =  wavread(filename);
[M,N] = size(x);
T = 0.2;
D = Fs*T;
y = [ zeros(D,N)  ;  x  ] ;
x = [ x   ;  zeros(D,N) ] ;
dt = 1/Fs; 
t = dt*(0:M-1)';
figure;
plot(t,x, t,y);

HTH.

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Answer 2

ckchew 2011-7-2

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https://ww2.mathworks.cn/matlabcentral/answers/10742-time-delay-for-time-domain-function#answer_14800

Hello there Rick! you're using the principle of zero padding to implement the time delay? that's ingenius! Thank you so much for the idea and code, it really helped a lot!:) have a pleasant day ahead!^^