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A new optimized algorithm for computation of MDCT and its inverse transform

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3 Author(s)
Hi-Seok Kim ; Sch. of Electron. & Inf. Eng., Chongju Univ., Cheongju, South Korea ; Yang-Ki Cho ; Won-Pyo Lee

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.

Published in:

Intelligent Signal Processing and Communication Systems, 2004. ISPACS 2004. Proceedings of 2004 International Symposium on

Date of Conference:

18-19 Nov. 2004