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Hiiiii,
I am Jitendra,Comm.Engg. making Reed-Solomon Codec using spec
of ITU-J.83 Annex-B.
Specs are :
n=128,k=122,
under GF(128),
7-bit symbol,
Generator Polynomial :
G(x)=(x+alpha^1)(x+alpha^2)(x+alpha^3)(x+alpha^4)( x+alpha^5);
As per the standard I come up with a encoder, But I didnt have an
reference to verify/check my codeword. In matlab, RS functions are takin
n and k parameters such that n-k differece must be +ve even integer.
Here while encoding, we have to set n=127.and that's is max value for
under GF(128) for 7-bit symbol.
After Generating 127 symbols CW, 128th symbol is generated by evaluatin
CW on 6th power alpha.

Decoder side, I calculated 5 syndromes by evaluating 127-symbol CW a
alpha,...alpha^5 and 6th syndromes by evaluating 128-symbol CW a
alpha^6.
But I am not able to decode it.

If you have any usefull information on this let
me know.

Thanks,
Jitendra.
[email protected]
[email protected]