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Convention Paper

A Parametric Instrument Codec for Very Low Bit Rates

Authors: Arnold, Mirko; Schuller, Gerald

AES Convention 125 · Paper 7501 · October 2008

Abstract

A technique for the compression of guitar signals is presented which utilizes a simple model of the guitar. The goal for the codec is to obtain acceptable quality at significantly lower bitrates compared to universal audio codecs. This instrument codec achieves its data compression by submitting an excitation function and model parameters to the receiver instead of the waveform. The parameters are extracted from the signal using weighted least squares approximation in the frequency domain. For evaluation a listening test has been conducted and the results are presented. They show that this compression technique provides a quality level comparable to recent universal audio codecs. The usability however is at this stage limited to very simple guitar melody lines.

Details

Published in
AES Convention 125
AES Convention
125
Paper number
7501
Publication date
October 6, 2008
Session subject
Audio Coding
Affiliation
Fraunhofer Institute for Digital Media Technology (See document for exact affiliation information.)
Type
Convention Paper