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  • Research Article
  • Open Access

Warped Linear Prediction of Physical Model Excitations with Applications in Audio Compression and Instrument Synthesis

EURASIP Journal on Advances in Signal Processing20042004:854940

  • Received: 8 July 2003
  • Published:


A sound recording of a plucked string instrument is encoded and resynthesized using two stages of prediction. In the first stage of prediction, a simple physical model of a plucked string is estimated and the instrument excitation is obtained. The second stage of prediction compensates for the simplicity of the model in the first stage by encoding either the instrument excitation or the model error using warped linear prediction. These two methods of compensation are compared with each other, and to the case of single-stage warped linear prediction, adjustments are introduced, and their applications to instrument synthesis and MPEG4's audio compression within the structured audio format are discussed.

Keywords and phrases

  • warped linear prediction
  • audio compression
  • structured audio
  • physical modelling
  • sound synthesis

Authors’ Affiliations

Department of Acoustic Design, Graduate School of Design, Kyushu University, 4-9-1 Shiobaru,Minami-ku, Fukuoka 815-8540, Japan
Department of Acoustic Design, Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Minami-ku, Fukuoka 815-8540, Japan


© Glass and Fukudome 2004

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.