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Convention Paper

Cascaded Trellis-Based Optimization for MPEG-4 Advanced Audio Coding

Authors: Yang, Cheng-Han; Hang, Hsueh-Ming

AES Convention 115 · Paper 5977 · October 2003

Abstract

A low complexity and high performance scheme for choosing MPEG-4 Advanced Audio Coding (AAC) parameters is proposed. One key element in producing good quality compressed audio at low rates is selecting proper coding parameter values. The MPEG committee AAC reference model does not do well on this job. A joint trellis-based optimization approach has thus been previously proposed. It leads to a near-optimal selection of parameters at the cost of extremely high computational complexity. It is, therefore, very desirable to achieve a similar coding performance (audio quality) at a much lower complexity. Simulation results indicate that the proposed cascaded trellis-based optimization scheme has a coding performance close to that of the joint trellis-based scheme, but it requires only 1/70 computations.

Details

Published in
AES Convention 115
AES Convention
115
Paper number
5977
Publication date
October 6, 2003
Session subject
Psychoacoustics; Audio Coding
Affiliation
Department of Electronics Engineering, National Chiao Tung University, Hsinchu, Taiwan, R.O.C. (See document for exact affiliation information.)
Type
Convention Paper