© 2011

Integral and Diagnostic Intrusive Prediction of Speech Quality


  • Develops a reliable intrusive speech quality model which estimates auditory test results

  • Introduces a new perceptual and a cognitive model which simulate the whole quality judgment process

  • Predicts very well the quality of many speech transmitting systems


Part of the T-Labs Series in Telecommunication Services book series (TLABS, volume 1)

Table of contents

  1. Front Matter
    Pages i-xvii
  2. Nicolas Côté
    Pages 5-35
  3. Nicolas Côté
    Pages 37-85
  4. Nicolas Côté
    Pages 133-186
  5. Nicolas Côté
    Pages 187-211
  6. Nicolas Côté
    Pages 213-217
  7. Back Matter
    Pages 219-248

About this book


This work deals with the instrumental measurement methods for the perceived quality of transmitted speech. These measures simulate the speech perception process employed by human subjects during auditory experiments. The measure standardized by the International Telecommunication Union (ITU), called “Wideband-Perceptual Speech Quality Evaluation (WB-PESQ)”, is not able to quantify all these perceived characteristics on a unidimensional quality scale, the Mean Opinion Score (MOS) scale. Recent experimental studies showed that subjects make use of several perceptual dimensions to judge about the quality of speech signals. In order to represent the signal at a higher stage of perception, a new model, called “Diagnostic Instrumental Assessment of Listening quality (DIAL)”, has been developed. It includes a perceptual and a cognitive model which simulate the whole quality judgment process. Except for strong discontinuities, DIAL predicts very well speech quality of different speech processing and transmission systems, and it outperforms the WB-PESQ.


Diagnostic Instrumental Assessment of Listening quality Echo cancellation Evaluation WB-PESQ Mean Opinion Score MOS Speech transmission Super-WideBand transmissions Voice over Internet Protocol (VoIP) Wideband-Perceptual Speech Quality packet losses third generation mobile networks information and communication, circuits

Authors and affiliations

  1. 1., Centre Européen de Réalité VirtuelleUniversité de Bretagne OccidentalePlouzanéFrance

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