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

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Boby Ahmad
Boby Ahmad 2017-7-3
回答： Image Analyst 2017-7-7
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
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

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Image Analyst
Image Analyst 2017-7-7

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