Comparison of VoIP-QoE from Skype, LINE, Tango and Viber over 3G networks in Thailand

This paper presents a study of VoIP - Quality of Experience (VoIP-QoE) of a well-known VoIP application and three modern ones, Skype, LINE, Tango and Viber, using Perceptual Evaluation of Speech Quality (PESQ) with English speech samples. From this study, it has been found that Skype and LINE tend to provide better VoIP quality than Tango and Viber, particularly when used over good stabile 3G networks. Although, with slight differences between Skype and LINE, it has been found that there is no significant difference between VoIP quality from Skype and LINE over four 3G networks(p-values = 0.291-0.840). Therefore, Skype and LINE are good options for free VoIP calls over most 3G networks in Bangkok, the capital city of Thailand. Nevertheless, it has been found that, referring to instability or low speed 3G networks, there is no significant difference among VoIP quality from Skype, LINE, Tango and Viber.