Integer discrete cosine transform and its fastalgorithm
LiZhi Cheng, Hui Xu, Yong Huan Luo · Electronics Letters · 2001
A recursive sparse matrix decomposition for a floating-point discrete cosine transform (DCT) matrix is presented. Based on this matrix decomposition approach, a split-radix DCT algorithm is proposed and a new integer DCT (IntDCT) algorithm that requires only lifting steps and additions is developed.