A New Decomposition Algorithm of DCT-IV/DST-IV for Realizing Fast IMDCT Computation

Author

Li, Hui ; Li, Ping ; Wang, Yiwen ; Tang, Qi ; Gao, Lijian

Author_Institution

State Key Lab. of Electron. Thin Films & Integrated Devices, Univ. of Electron. Sci. & Technol. of China, Chengdu

Volume

16

Issue

9

fYear

2009

Firstpage

735

Lastpage

738

Abstract

In this letter, a new decomposition algorithm of type-IV discrete cosine transform/type-IV discrete sine transform (DCT-IV/DST-IV) and architecture of a hardware accelerator for realizing fast inverse modified discrete cosine transform (IMDCT) computation are presented. The comparisons of computational complexity with some well-known algorithms show that the proposed algorithm possesses the advantages of higher computational efficiency and simpler hardware implementation. A real-time audio decoding experiment was performed to verify the efficiency of the proposed algorithm. Experimental results show more than one third of computational cycles are saved compared with one of reported fast algorithms for IMDCT computation.

Keywords

audio coding; channel bank filters; discrete cosine transforms; DCT-IV/DST-IV; decomposition algorithm; discrete cosine transform/type-IV discrete sine transform; fast IMDCT computation; fast inverse modified discrete cosine transform; hardware accelerator; Hardware accelerators; inverse modified discrete cosine transform; type-IV discrete cosine/sine transform;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2009.2022789

Filename

4916076