how to create a anlaytic signal from real signal

i have an audio signal i need to convert it in to analytic signal to use it with WVD

[Jan]

What is your Matlab related question?

[raj]

i was of the impression that to get an analytic signal

from real signal Y = yr(real signal) + j*hilbert(yr);

is it right???

Answer 1

[Daniel Shub]

Despites its silly name ( http://www.mathworks.com/matlabcentral/answers/3134-hilbert-transform ), the hilbert function return the analytic signal

load handel
yr = hilbert(y);

[raj]

i was of the impression that to get an analytic signal

from real signal Y = yr(real signal) + j*hilbert(yr);

is it right???

[Wayne King]

Yes, you are right mathematically speaking. That is what Daniel is referring to when he writes "despite its silly name". The MATLAB function hilbert() is returning the analytic signal and NOT just the Hilbert transform, like:

ht_y = imag(hilbert(y));

[Daniel Shub]

Depends what you mean by hilbert(yr) ... If you mean the Hilbert transform, then yes. If you mean the oddly named function in MATLAB, then no. The hilbert function in MATLAB does not return the Hilbert transform, rather it returns the analytic signal. The link I provided takes you to a similar question that I asked a while back.

[raj]

hmm ya thanks a lot....:)