Y.S.Han Decoding BCH/RS Codes YhXk 1-xXk k=1 Define the error-evaluator polynomial as 2(x）)AA()S() ∑KXkΠ1-xX) k= The degree of the error-evaluator polynomial is less than U. Actually we only know the first 2t terms of S(x)such that we have School of Electrical Engineering Intelligentization,Dongguan University of Technology Y. S. Han Decoding BCH/RS Codes 7 = ∑ v k=1 YkXk 1 − xXk . • Define the error-evaluator polynomial as Ω(x) △ = Λ(x)S(x) = ∑ v k=1 YkXk ∏ v j=1 j̸=k (1 − xXj ). • The degree of the error-evaluator polynomial is less than v. • Actually we only know the first 2t terms of S(x) such that we have School of Electrical Engineering & Intelligentization, Dongguan University of Technology