On using the Itakura-Saito measures for speech coder performance evaluation

The purpose of this paper is to discuss theoretical, as well as psychophysical, aspects of using the Itakura-Saito type of measures for evaluating the quality of coded speech. We present psychoacoustic interpretations of the measures and identify their effectiveness as well as limitations within the theoretical framework of a generalized waveform coder distortion model. The discussions then point out some specific issues to be resolved through psychoacoustic research effort.