Publication: MOS estimation model development using ACR listening-opinion tests with Thai users referring to loss effects: a case of G.726 and G.729
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2017
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en
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1432-1882
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item.page.harrt.identifier.callno
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Multimedia Systems
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24
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3
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285
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295
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MOS estimation model development using ACR listening-opinion tests with Thai users referring to loss effects: a case of G.726 and G.729
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Abstract
This paper proposes two models of Mean Opinion Score (MOS) estimation based on Thai users and the Thai language; referring to packet loss effects; for G.726 and G.729 codecs. Based on Thai users and Thai speech referring to packet loss effects in this work; the Absolute Category Rate (ACR) listening tests were conducted with 89 participants and 107 participants for the MOS estimation model development of G.726 and G.729 respectively; while the same tests were conducted with totally 60 participants for the model evaluation of both codecs. Packet loss rates were 0–15% for G.726 with 5 test conditions and G.729 with 6 test conditions; each condition was conducted with at least 16 participants. After gathering the data; the MOS estimation models for both codecs were simply created and then evaluated with the test sets; comparing Perceptual Evaluation of Speech Quality (PESQ); a popular measurement method. For one of the contributions of this study; after the models were evaluated using Mean Absolute Percentage Error (MAPE); it was found that the proposed models for G.726 and G.729 provided better performance than PESQ; particularly by reducing the MAPE by about 30% and 17% respectively; compared to PESQ.