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Convention Paper

A Novel Integrated Audio Bandwidth Extension Toolkit (ABET)

Authors: E.V., Harinarayanan; Ferreira, Aníbal J. S.; Sinha, Deepen

AES Convention 120 · Paper 6788 · May 2006

Abstract

Bandwidth Extension has emerged as an important tool for the satisfactory performance of low bit rate audio and speech codecs. In this paper we describe the components of a novel integrated audio bandwidth extension toolkit (ABET). The ABET toolkit is a combination of two bandwidth extension tools: (i) The Fractal Self-Similarity Model (FSSM) for signal spectrum; and, (ii) Accurate Spectral Replacement (ASR). Combination of these two tools, which are applied directly to high frequency resolution representation of the signal such as the Modified Cosine Transform (MDCT), has several benefits for increased accuracy and efficiency of the high frequency signal components. At the same time the combination of the two tools entails a number of importation algorithmic and perceptual considerations. In this paper we describe the components of the ABET bandwidth extension toolkit in detail. Algorithmic details, audio demonstrations, and, comparison to other audio coding schemes will be presented. Additional information and audio samples will be available at http://www.atc-labs.com/abet/ .

Details

Published in
AES Convention 120
AES Convention
120
Paper number
6788
Publication date
May 6, 2006
Session subject
Low Bit-Rate Audio Coding
Affiliation
ATC Labs; University of Porto (See document for exact affiliation information.)
Type
Convention Paper