Title :
A new optimized algorithm for computation of MDCT and its inverse transform
Author :
Kim, Hi-Seok ; Cho, Yang-Ki ; Lee, Won-Pyo
Author_Institution :
Sch. of Electron. & Inf. Eng., Chongju Univ., Cheongju, South Korea
Abstract :
The paper presents an optimized algorithm for the computation of the modified discrete cosine transform (MDCT) and its inverse transform (IMDCT). The proposed algorithm is based on the type II DCT (DCT-II). By extracting a common transform kernel to compute both the MDCT and IMDCT, we obtain a unified structure for computation of both of them. Also, since the proposed unified structure is very symmetrical, it is suited to the parallel or pipelined VLSI implementation of MDCT/IMDCT. Furthermore, it requires less calculation complexity than existing algorithms.
Keywords :
VLSI; computational complexity; discrete cosine transforms; optimisation; parallel processing; pipeline processing; signal processing; calculation complexity; inverse modified DCT; inverse modified discrete cosine transform; optimized algorithm; parallel VLSI implementation; pipelined VLSI implementation; signal processing; transform kernel; type II DCT; Audio coding; Concurrent computing; Digital audio players; Discrete cosine transforms; Discrete transforms; Equations; Filter bank; Kernel; Time domain analysis; Very large scale integration;
Conference_Titel :
Intelligent Signal Processing and Communication Systems, 2004. ISPACS 2004. Proceedings of 2004 International Symposium on
Print_ISBN :
0-7803-8639-6
DOI :
10.1109/ISPACS.2004.1439112