A Low-Complexity Design for an MP3 Multi-Channel Audio Decoding System

Author

Moon, Han-Gil

Author_Institution

Dept. of Exp. Psychol., Univ. of Cambridge, Cambridge, UK

Volume

20

Issue

1

fYear

2012

Firstpage

314

Lastpage

321

Abstract

In this paper, a low complexity design for a DFT-based MP3 multi-channel audio decoding system is proposed. By utilizing the proposed decoding system, the advanced MP3 multi-channel decoder can play high-quality multi-channel audio with low processing power. The MP3 multi-channel system is composed of two components, a parametric multi-channel decoder, and an MP3 decoder. A novel convolution-synthesis method in the transform domain can replace the pseudo-quadrature mirror filter (PQMF) module in the MP3 decoder and several small size discrete Fourier transform (DFT) modules can be used instead of a large-size DFT module in the multi-channel decoder. This combination noticeably reduces computing power without significant loss in the decoded audio signal quality. The effect of the error in the decoded audio signal is analyzed by both objective and subjective methods.

Keywords

audio coding; convolution; decoding; discrete Fourier transforms; encoding; pulse height analysers; quadrature mirror filters; DFT-based MP3 multichannel audio decoding system; audio signal quality; convolution-synthesis method; discrete Fourier transform; low processing power; low-complexity design; pseudoquadrature mirror filter module; Complexity theory; Decoding; Digital audio players; Filter banks; Materials; Transforms; Convolution-synthesis method; MP3; MP3 multi-channel; low-complexity decoder; parametric multi-channel;

fLanguage

English

Journal_Title

Audio, Speech, and Language Processing, IEEE Transactions on

Publisher

ieee

ISSN

1558-7916

Type

jour

DOI

10.1109/TASL.2011.2161081

Filename

5936673