Saowanit Sukparungsee

Work place: Dept. of Applied Statistics, Faculty of Applied Science King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand



Research Interests:


Saowanit Sukparungsee: received B.Sc. (Applied Statistics) from KMUTNB and M.S. (Statistics) from Chulalongkorn University, Thailand, in 1997 and 2000 respectively. Then she received Ph.D. (Mathematical Science) from University of Technology Sydney, Australia, 2009. Now she is an assistant professor and the head of Department of Applied Statistics, Faculty of Applied Science, KMUTNB.

Author Articles
Speech Quality Assessment of VoIP: G.711 VS G.722 Based on Interview Tests with Thai Users

By Therdpong Daengsi Chai Wutiwiwatchai Apiruck Preechayasomboon Saowanit Sukparungsee

DOI:, Pub. Date: 8 Mar. 2012

This paper presents the comparison between two codecs, G.711 and G.722 at 64 kbps, referring to speech quality perception using a subjective method called interview tests. These subjective tests have been conducted with 201 subjects, who are Thai native speakers that use Thai which is a tonal language, for accuracy and reliability of results. The results from testing with both codecs are almost the same; the scores are 4.17 for G.722 and 4.14 for G.711. After analyzing the results, it has been confirmed that G.722 does not provide better speech quality than G.711 to the Thai subjects significantly, which is consistent with previous information. However, these results could be used as the benchmark of G.711 and G.722 for speech quality assessment within Thai environments.

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