A Unified Fast Algorithm for Cosine Modulated Filter Banks in Current Audio Coding Standards
Chi-Min Liu, Wen‐Chieh Lee · 1999
This paper demonstrates that all these MCTs can be derived into two modules: the permutation and the discrete cosine transform. The derived DCTs are either type-II, type-III, or type IV. On the three types of the DCT, this paper proposes a fast computing algorithm to uniformly compute all the three types of the DCTs. The new fast algorithm has good features in regularity, complexity, and general applicability