On the basis of a formation polynomial equation corresponding to a plurality of different encoding codes of each size to be obtained from a common primitive polynomial equation, hardware of a coefficient circuit is shared in coefficients that values of the coefficients are the same or have a small difference. 共通の原始多項式から得られる各々サイズの異なる複数の符号化コードに対応する生成多項式に基づいて、係数の値が同一又は少数差の係数について係数回路のハードウェアを共用する。 - 特許庁