Open Access

Progressive Syntax-Rich Coding of Multichannel Audio Sources

EURASIP Journal on Advances in Signal Processing20032003:365703

https://doi.org/10.1155/S1110865703304044

Received: 6 May 2002

Published: 8 September 2003

Abstract

Being able to transmit the audio bitstream progressively is a highly desirable property for network transmission. MPEG- version audio supports fine grain bit rate scalability in the generic audio coder (GAC). It has a bit-sliced arithmetic coding (BSAC) tool, which provides scalability in the step of 1 Kbps per audio channel. There are also several other scalable audio coding methods, which have been proposed in recent years. However, these scalable audio tools are only available for mono and stereo audio material. Little work has been done on progressive coding of multichannel audio sources. MPEG advanced audio coding (AAC) is one of the most distinguished multichannel digital audio compression systems. Based on AAC, we develop in this work a progressive syntax-rich multichannel audio codec (PSMAC). It not only supports fine grain bit rate scalability for the multichannel audio bitstream but also provides several other desirable functionalities. A formal subjective listening test shows that the proposed algorithm achieves an excellent performance at several different bit rates when compared with MPEG AAC.

Keywords

multichannel audio progressive coding Karhunen-Loéve transform successive quantization PSMAC

Authors’ Affiliations

(1)
Integrated Media Systems Center and Department of Electrical Engineering, University of Southern California

Copyright

© Copyright © 2003 Hindawi Publishing Corporation 2003