Fast Radix- and Mixed-Radix Algorithms for Type-IV DCT
Han-Wen Hsu
Chi-Min Liu
Dept. of Comput. Sci., Nat. Chiao Tung Univ., Hsinchu;
This paper appears in: Signal Processing Letters, IEEE
Publication Date: 2008
Volume: 15,
On page(s): 910-913
ISSN: 1070-9908
INSPEC Accession Number: 10370906
Digital Object Identifier: 10.1109/LSP.2008.2005441
Current Version Published: 2008-12-22
Abstract
This letter proposes a fast radix-q algorithm to compute type-IV discrete cosine transform (DCT) of the length qlambda, where q is an odd positive integer. The proposed fast radix-q algorithm has merits in computational complexity, parallelism, and numerical stability over existing algorithms. Furthermore, the fast radix-q algorithm is used to develop the fast mixed-radix type-II/ type-IV DCT algorithm for composite lengths.
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