Method for realising reversible integer type-IV discrete cosine transform
Hongtao Huang, Rongshan Yu, X. Lin, Susanto Rahardja · Electronics Letters · 2004
A novel method for realising reversible integer discrete cosine transform type IV (DCT-IV) is presented. The method is derived by first constructing a transform matrix using DCT-IV matrix, then factorising the transform matrix into the product of three lifting matrices. The proposed method exhibits low rounding number and is the most accurate to the floating-point DCT-IV transform.