Voice over IP performance monitoring
ACM SIGCOMM Computer Communication Review
Control mechanisms for packet audio in the internet
INFOCOM'96 Proceedings of the Fifteenth annual joint conference of the IEEE computer and communications societies conference on The conference on computer communications - Volume 1
Low bit-rate speech coders for multimedia communication
IEEE Communications Magazine
A survey of packet loss recovery techniques for streaming audio
IEEE Network: The Magazine of Global Internetworking
A source and channel rate adaptation algorithm for AMR in VoIP using the Emodel
NOSSDAV '03 Proceedings of the 13th international workshop on Network and operating systems support for digital audio and video
A model for MPEG with forward error correction and TCP-friendly bandwidth
NOSSDAV '03 Proceedings of the 13th international workshop on Network and operating systems support for digital audio and video
The effect of packet dispersion on voice applications in IP networks
IEEE/ACM Transactions on Networking (TON)
ACM SIGCOMM Computer Communication Review
On improving the efficiency and manageability of NotVia
CoNEXT '07 Proceedings of the 2007 ACM CoNEXT conference
Path selection using available bandwidth estimation in overlay-based video streaming
Computer Networks: The International Journal of Computer and Telecommunications Networking
On the deployment of VoIP in Ethernet networks: methodology and case study
Computer Communications
Fair and efficient dynamic bandwidth allocation for multi-application networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Path selection using available bandwidth estimation in overlay-based video streaming
NETWORKING'07 Proceedings of the 6th international IFIP-TC6 conference on Ad Hoc and sensor networks, wireless networks, next generation internet
IEEE Network: The Magazine of Global Internetworking - Special issue on improving quality of experience for network services
Calculation of speech quality by aggregating the impacts of individual frame losses
IWQoS'05 Proceedings of the 13th international conference on Quality of Service
Timely and continuous machine-learning-based classification for interactive IP traffic
IEEE/ACM Transactions on Networking (TON)
Autonomic QoS Optimization of Real-Time Internet Audio Using Loss Prediction and Stochastic Control
International Journal of Adaptive, Resilient and Autonomic Systems
An efficient critical protection scheme for intra-domain routing using link characteristics
Computer Networks: The International Journal of Computer and Telecommunications Networking
Survey on application-layer mechanisms for speech quality adaptation in VoIP
ACM Computing Surveys (CSUR)
Proceedings of the ninth ACM conference on Emerging networking experiments and technologies
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Packet loss degrades the perceived quality of voice over IP (VoIP). In addition, packet loss in the Internet tends to come in bursts, which may further degrade audio quality. Using the Gilbert loss model, we infer that changing the packet interval affects loss burstiness, which in turn influences forward error correction (FEC) performance. Next, we perform subjective listening tests based on Mean Opinion Score (MOS) to evaluate the effect of bursty loss on VoIP perceived quality. Then, we compare the perceived quality achieved by two major loss repair methods: FEC and low bit-rate redundancy (LBR). Our MOS test results show that FEC is much preferred over LBR. In addition, our MOS results reveal that, under bursty loss, FEC quality is much better with a moderately large packet interval. Finally, because FEC introduces an extra delay proportional to the packet interval, we present a method of optimizing the packet interval to maximize FEC MOS by considering the delay impairment in ITU's E-model standard.