/966 Reduced implementation Using ac-bd a(c-d)+d(a-b) ad+bc=b(c+d)+d(a-b) Rewrite it into matrix form,its coefficient matrix can be decomposed as the product of three matrix: 世服胸 Pre-computed coefficient Step I Step IⅢ Step III 3 multiplications and 3 additions.Thus 1 multiplier saved. 2021年2月 52021年2月 5  Reduced implementation  Using  Rewrite it into matrix form, its coefficient matrix can be decomposed as the product of three matrix: ( ) ( ) ( ) ( ) ad bc b c d d a b ac bd a c d d a b           3 multiplications and 3 additions. Thus 1 multiplier saved. Pre-computed coefficient Step I Step II Step III