Conception de signaux de référence pour l'évaluation de la qualité perçue des codecs de la parole et du son

This work aims to provide reference signals representative of the new techniques of speech coding for subjective assessment tests of speech quality. A non-metric weighted multidimensional scaling (MDS) analysis is used for the perceptual analysis of the defects generated by wideband codecs. The results indicate a four-dimensional space to elucidate the perception of current defects. These dimensions are characterized from a coding point of view.