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Evaluation of Objective Quality Models on Neural Audio Codecs

Thomas Muller (Orange (France)), Stéphane Ragot (Orange (France)), Vincent Barriac (Orange (France)), Pascal Scalart (Institut de Recherche en Informatique et Systèmes Aléatoires, Université de Rennes)

International Workshop on Acoustic Signal Enhancement
License: not stated (all rights reserved)

Abstract: With the emergence of neural audio codecs and new objective quality models based on machine learning, there is a need to clarify which models predict accurately the perceptual quality of coded speech. In this paper, we consider a selected sub-set of ten objective quality models; we present a correlation analysis based on test results from a P.800 ACR experiment on clean speech, assessing the quality of neural speech/audio codecs – traditional codecs (EVS, Opus) are also included as yardsticks. The evaluation is limited to signal-based models for listening-only quality. Overall results per condition are analyzed in terms of Pearson’s correlation, Kendall’s Tau and root mean squared error (RMSE); objective scores per codec are also discussed.

Published on 09 Sep. 2024