Combining Layer Coding and Bandwidth Allocation for Video Distribution on Content Delivery Networks

Wei Lune Tang, Shih Hsuan Yang*, Ho Ting Wu, Shao Ci Jheng

*此作品的通信作者

研究成果: 期刊稿件文章同行評審

4 引文 斯高帕斯(Scopus)

摘要

In current heterogeneous networks, video can be transmitted using different bit rates and delivered to various end devices with different resolutions and computing power. Single-layer coded video does not meet all of the bandwidth and device requirements. Scalable video coding (SVC) facilitates the transmission of once-encoded video at a target bit rate and the rendering of the video with specified quality. This study investigated methods for distributing and transmitting H.264 SVC-coded videos through content delivery networks (CDNs). The bit-rate allocation of the SVC quality layers with three different ratios (constant, Fibonacci, and exponential) was examined. Three bandwidth allocation strategies for CDN surrogate servers managing the outgoing traffic (stop and wait, stationary quality, and quasi-equal quality) were also evaluated. The use of layer coding in CDNs improves the video service quality in heterogeneous networks. Furthermore, simulation results show that the quasi-equal-quality bandwidth allocation strategy with the SVC layer sizes forming a Fibonacci sequence generally achieves the highest peak-signal-to-noise ratio and shortest waiting time of end users.

原文英語
頁(從 - 到)1555-1573
頁數19
期刊Wireless Personal Communications
91
發行號4
DOIs
出版狀態已出版 - 01 12 2016
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Publisher Copyright:
© 2015, Springer Science+Business Media New York.

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