A Comparative Analysis of the Perceived Quality of VoIP under Various Wireless Network Conditions

Tsompanidis, Ilias; Fortetsanakis, Georgios; Hirvonen, Toni; Papadopouli, Maria

doi:10.1007/978-3-642-13315-2_28

Cited by 10 publications

(4 citation statements)

References 15 publications

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“…Because speech perception may vary with the use of different packet loss concealment settings and codecs, we cannot generalize our results for all VoIP software available on the market. VoIP audio quality may further be influenced by wireless network conditions [ 34 ].…”

Section: Discussionmentioning

confidence: 99%

Speech Perception Benefits of Internet Versus Conventional Telephony for Hearing-Impaired Individuals

Mantokoudis

Dubach²,

Pfiffner³

et al. 2012

J Med Internet Res

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BackgroundTelephone communication is a challenge for many hearing-impaired individuals. One important technical reason for this difficulty is the restricted frequency range (0.3–3.4 kHz) of conventional landline telephones. Internet telephony (voice over Internet protocol [VoIP]) is transmitted with a larger frequency range (0.1–8 kHz) and therefore includes more frequencies relevant to speech perception. According to a recently published, laboratory-based study, the theoretical advantage of ideal VoIP conditions over conventional telephone quality has translated into improved speech perception by hearing-impaired individuals. However, the speech perception benefits of nonideal VoIP network conditions, which may occur in daily life, have not been explored. VoIP use cannot be recommended to hearing-impaired individuals before its potential under more realistic conditions has been examined.ObjectiveTo compare realistic VoIP network conditions, under which digital data packets may be lost, with ideal conventional telephone quality with respect to their impact on speech perception by hearing-impaired individuals.MethodsWe assessed speech perception using standardized test material presented under simulated VoIP conditions with increasing digital data packet loss (from 0% to 20%) and compared with simulated ideal conventional telephone quality. We monaurally tested 10 adult users of cochlear implants, 10 adult users of hearing aids, and 10 normal-hearing adults in the free sound field, both in quiet and with background noise.ResultsAcross all participant groups, mean speech perception scores using VoIP with 0%, 5%, and 10% packet loss were 15.2% (range 0%–53%), 10.6% (4%–46%), and 8.8% (7%–33%) higher, respectively, than with ideal conventional telephone quality. Speech perception did not differ between VoIP with 20% packet loss and conventional telephone quality. The maximum benefits were observed under ideal VoIP conditions without packet loss and were 36% (P = .001) for cochlear implant users, 18% (P = .002) for hearing aid users, and 53% (P = .001) for normal-hearing adults. With a packet loss of 10%, the maximum benefits were 30% (P = .002) for cochlear implant users, 6% (P = .38) for hearing aid users, and 33% (P = .002) for normal-hearing adults.ConclusionsVoIP offers a speech perception benefit over conventional telephone quality, even when mild or moderate packet loss scenarios are created in the laboratory. VoIP, therefore, has the potential to significantly improve telecommunication abilities for the large community of hearing-impaired individuals.

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Section: Discussionmentioning

confidence: 99%

Speech Perception Benefits of Internet Versus Conventional Telephony for Hearing-Impaired Individuals

Mantokoudis

Dubach²,

Pfiffner³

et al. 2012

J Med Internet Res

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“…We have extended the QoE study described in [12] for Android users to better understand the impact of the network conditions on the QoE. The next milestone is the deployment of a small-scale testbed and the performance of empirical studies with u-map clients and "virtual providers" (using our software-defined radio testbed).…”

Section: Discussionmentioning

confidence: 99%

Supporting wireless access markets with a user-centric QoE-based geo-database

Fortetsanakis

Katsarakis

Plakia

et al. 2012

Proceedings of the Seventh ACM International Workshop on Mobility in the Evolving Internet Architecture

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This paper presents the u-map, a novel user-centric geodatabase for wireless access markets that enables clients to upload information about their profile, their quality-ofexperience (QoE) feedback for a service, traffic demand, network/spectrum conditions (e.g., interference, coverage), providers, and their position (e.g., GPS-based measurements) in a spatio-temporal geo-database. To evaluate the impact of the u-map on wireless access markets and study the evolution of such markets, we have developed an economic-driven modeling framework. The framework integrates models of the channel, clients and network operators, wireless infrastructures, types of interaction, and price adaptation in a modular manner. We have implemented a simulation platform based on this framework and instantiated a cellularbased duopoly. Via simulations, we analyzed the impact of the u-map, user profiles, and network coverage of providers on the evolution of the market. The analysis demonstrates that the u-map can be beneficial to users in their network operator selection process. We also developed a proof-ofconcept implementation of the u-map and performed a preliminary analysis. Finally, the paper highlights the research directions that need to be explored for developing a robust and effective mechanism.

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“…Recently, Moller et al [14] and Tsompanidis et al [18] consider the problem of QoE measurement for VoIP applications in heterogeneous access networks by considering network impairments such as handoffs and network congestion. However, they consider models such as the ITU-T E-Model [4] for QoE measurement.…”

Section: Related Workmentioning

confidence: 99%

“…Relationships between several parameters such as delay, jitter, packet loss and users QoE has been studied widely in the literature [14], [18]. Even then, these relationships may not correctly model users QoE due to dynamic nature of underlying network conditions and the user environment where uncertainty plays a dominant role.…”

Section: A Decision-theoretic Approach For Quality Of Experiencementioning

confidence: 99%

Performance evaluation of a decision-theoretic approach for quality of experience measurement in mobile and pervasive computing scenarios

Mitra

Åhlund

Zaslavsky

2012

2012 IEEE Wireless Communications and Networking Conference (WCNC)

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Abstract-Measuring and predicting users quality of experience (QoE) in dynamic network conditions is a challenging task. This paper presents results related to a decision-theoretic methodology incorporating Bayesian networks (BNs) and utility theory for quality of experience (QoE) measurement and prediction in mobile computing scenarios. In particular, we show how both generative and discriminative BNs can be used to measure and predict users QoE accurately for voice applications under several wireless network conditions such as wireless signal fading, vertical handoffs, wireless network congestion and normal hotspot traffic. Through extensive simulation studies and results analysis, we show that our proposed methodology can achieve an average accuracy of 98.70% using three different types of Bayesian network.

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A Comparative Analysis of the Perceived Quality of VoIP under Various Wireless Network Conditions

Cited by 10 publications

References 15 publications

Speech Perception Benefits of Internet Versus Conventional Telephony for Hearing-Impaired Individuals

Speech Perception Benefits of Internet Versus Conventional Telephony for Hearing-Impaired Individuals

Supporting wireless access markets with a user-centric QoE-based geo-database

Performance evaluation of a decision-theoretic approach for quality of experience measurement in mobile and pervasive computing scenarios

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