5th European Conference on Speech Communication and Technology

Rhodes, Greece
September 22-25, 1997

Perceptual Filter Comparisons for Wideband and FM Bandwidth Audio Coders

Marcos Perreau Guimaraes (1), Nicolas Moreau (2), Madeleine Bonnet (1)

(1) Universite Rene Descartes-Paris 5, UFR de Mathematiques et Informatique, Paris Cedex 06, France (2) ENST/SIG, Paris Cedex 13, France

High quality music coders commonly use auditory masked thresholds to account for the characteristics of the human ear. Perceptual filters (based upon linear signal prediction used in speech coders) are compared to filters using masked thresholds. Using listening tests, we have noticed that the second method does not provide better perceptual results. A natural way of proceeding would be to define a better psychoacoustical model. However, an intermediate method is presented here which allows additional degrees of freedom in a standard technique. The roots of the whitening filter are treated individually.

Full Paper

Bibliographic reference.  Guimaraes, Marcos Perreau / Moreau, Nicolas / Bonnet, Madeleine (1997): "Perceptual filter comparisons for wideband and FM bandwidth audio coders", In EUROSPEECH-1997, 1503-1506.