I need a matlab code for doing(2d) wavelet decomposition(DWT) in ecg signal and need a code for embedding secret information into noise part of ecg after decomposition.

iam doing a project to hide informations into ecg signal without getting distorted, i need help for wavelet decomposition and embedding steps.

[Muhusina Ismail]

Sir, i need to decompose the ecg signal,and after decomposing we get two suband frequency components of the signal,in that the high frequency component contains noise part of ecg signal ,where i want to embed the secret information .So,please help me by providing more helpful code.sir, i didn't understand the link you have shared.

Answer 1

[Walter Roberson]

There is an example of a level 5 wavelet here

The rest of your question has to do with steganography. There are hundreds of previous Questions here that you can look through. http://uk.mathworks.com/matlabcentral/answers/?term=steganography

[Walter Roberson]

Which wavelet do you want to use?

[Muhusina Ismail]

DWT

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/?term=tag%3Asteganography+tag%3Adwt

http://www.mathworks.com/matlabcentral/answers/?term=tag%3Asteganography+tag%3Aaudio

Answer 2

[TOBIN JOHN VARGHESE]

you can try wavelab850.Routines for Decomposition using spline wavelets are available there.

[Walter Roberson]

True. There can be some installation difficulties, which I posted about a few weeks ago in reference to beamlab which makes use of wavelab