On fast algorithms for computing the inverse modified discrete cosine transform
Yun-Hui Fan, Vijay Krishna Madisetti, Russell M. Mersereau · IEEE Signal Processing Letters · 1999
Two new fast algorithms for computing the inverse modified discrete cosine transform (IMDCT) as used in the adaptive spectral entropy coder (ASPEC) (Brandenburg et al. 1991) are proposed. A fixed-point error analysis is presented to determine the number of significant bits required for fixed-point implementations.