Title :
Radix-3 Algorithm for the Fast Computation of Forward and Inverse MDCT
Author :
Shu, Huazhong ; Bao, XuDong ; Toumoulin, Christine ; Luo, Limin
Author_Institution :
Dept. of Comput. Sci. & Eng., Southeast Univ., Nanjing
Abstract :
The modified discrete cosine transform (MDCT) and the inverse MDCT (IMDCT) are two of the most computationally intensive operations in layer III of MPEG audio coding standard. In this letter, we present a radix-3 algorithm for efficiently computing the MDCT and the corresponding IMDCT of a sequence with length N=2times3m. Comparison of the computational complexity with some known algorithms shows that the proposed approach reduces significantly the number of arithmetic operations
Keywords :
audio coding; code standards; computational complexity; data compression; discrete cosine transforms; sequences; IMDCT; MPEG audio coding standard; fast computation; inverse MDCT; layer III; modified discrete cosine transform; radix-3 algorithm; sequence; Arithmetic; Audio coding; Computational complexity; Decoding; Discrete cosine transforms; Filters; Helium; Laboratories; Signal processing algorithms; Very large scale integration; MPEG audio coding; Modified discrete cosine transform (MDCT); radix-3 algorithm;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2006.882108
