Impact of Network Dynamics on User's Video Quality: Analytical Framework and QoS Provision

We develop an analytical framework to investigate the impacts of network dynamics on the user perceived video quality. Our investigation stands from the end user's perspective by analyzing the receiver playout buffer. In specific, we model the playback buffer at the receiver by a G / G /1/¿ and...

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Bibliographic Details
Published in:IEEE transactions on multimedia 2010-01, Vol.12 (1), p.64-78
Main Authors: Luan, T.H., Cai, L.X., Xuemin Shen
Format: Article
Language:English
Subjects:
Applied sciences
Communication networks
Computer science
control theory
systems
Computer systems and distributed systems. User interface
Delay
Diffusion approximation
Exact sciences and technology
Jitter
playout buffer
Quality management
Quality of service
quality-driven
Software
Streaming media
Throughput
Video on demand
Video sharing
Videoconference
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Summary:We develop an analytical framework to investigate the impacts of network dynamics on the user perceived video quality. Our investigation stands from the end user's perspective by analyzing the receiver playout buffer. In specific, we model the playback buffer at the receiver by a G / G /1/¿ and G / G /1/ N queue, respectively, with arbitrary patterns of packet arrival and playback. We then examine the transient queue length of the buffer using the diffusion approximation. We obtain the closed-form expressions of the video quality in terms of the start-up delay, fluency of video playback and packet loss, and represent them by the network statistics, i.e., the average network throughput and delay jitter. Based on the analytical framework, we propose adaptive playout buffer management schemes to optimally manage the threshold of video playback towards the maximal user utility, according to different quality-of-service requirements of end users. The proposed framework is validated by extensive simulations.
ISSN:1520-9210
1941-0077
DOI:10.1109/TMM.2009.2036294