Ask about Steganography on DWT to hide .wav file on image

I have done make an steganography program GUI on matlab to hide text on image (.bmp) with DWT and LSB substitution algorythm, and now i try to make steganography with image to hide .wav file in it. i read some reference from this link

• http://www.ijritcc.org/download/conferences/ICEMTE_2017/Track_1_(CSE)/1490852798_30-03-2017.pdf *

i dont understand in this part, and when i try in matlab there was error

ESb(i)=bitxor(CA(i),HH(i,4))
HH(i,5)=ESb(i)  
================================
Here, ESb(i) is ith Encrypted Secrete bit which is obtained
from EX-OR of ith bit of CA and 4th bit of each pixel
value of HH from image. And this ESb(i) replaces 5th bit
of each pixel value of HH

can someone explain the detail encoding algorythm from that link or share the code?

or someone have steganography code to hide .wav file on image?

regards

Answer 1

[Image Analyst]

My code can be adapted to hide anything in an image. http://www.mathworks.com/matlabcentral/fileexchange/54155-encoding-text-into-image-gray-levels