need matlab code for diamond encoding

can anyone share the matlab code for diamond encoding for embedding bits

[Walter Roberson]

I find at least 7 different sites that consider diamond encoding in MATLAB to be worth a seminar project by itself, so it is pretty tempting to tag this as "doit4me" "no attempt" "homework"

[Kamali M]

I am doing my project in matlab. Please someone share the matlab code for diamond encoding.