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Convention Paper

Perceptual Optimization of the Frequency Selective Switch in Scalable Audio Coding

Authors: Vilermo, Miikka; Streich, Sebastian; Vaananen, Mauri; Linzmeier, Karsten; Grill, Bernhard; Wang, Ye

AES Convention 114 · Paper 5851 · March 2003

Abstract

In a simple scalable audio coding scheme, there are usually two layers ' a base layer and an enhancement layer. This paper describes a frequency selective switch (FSS) control algorithm, which is employed to optimally code the signal in the enhancement layer. The FSS determines whether the original signal or the residual of the original and base layer signals is sent to the enhancement layer in certain frequency bands. The proposed method introduces some advanced mechanism to the FSS and the quantization process to achieve perceptually optimal result in the encoding process, particularly at low bitrates. These changes do not assume any modifications in the decoder.

Details

Published in
AES Convention 114
AES Convention
114
Paper number
5851
Publication date
March 6, 2003
Session subject
Low Bit-Rate Coding
Affiliation
Nokia Research Center, Speech and Audio Systems Laboratory, Tampere, Finland ; Fraunhofer-Gesellschaft IIS, Erlangen, Germany (See document for exact affiliation information.)
Type
Convention Paper