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首页> 外文期刊>Journal of visual communication & image representation >Benefits and costs of scalable video coding for internet streaming
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Benefits and costs of scalable video coding for internet streaming

机译：用于互联网流的可伸缩视频编码的优势和成本

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摘要

Benefits and costs of scalable hybrid video coding techniques are analyzed with respect to internet streaming. Temporal, spatial, amplitude scalability, and combinations as described in MPEG-4 are considered. Benefits are a reduction of the server storage capacity, a reduction of the netload for multicast delivery and a graceful degradation in case of transmission errors. Costs are an increasing netload for unicast delivery and an increasing computational expense in the decoder. The result of an evaluation shows that temporal scalability has minimum costs among all analyzed techniques. It increases the netload for unicast only marginally with no additional computational expense in the decoder. Temporal scalability provides a reduction of the server storage capacity and netload for multicast by about 30% and two steps of graceful degradation. All other known standardized and nonstandardized techniques of spatial and amplitude scalability are associated with costs that appear too high to be attractive for internet streaming. Therefore, only temporal scalability is used at the present. Some of the scalable video coding techniques may become of interest for other applications where the investigated costs are less relevant.
机译：针对互联网流，分析了可伸缩混合视频编码技术的收益和成本。考虑了时间，空间，幅度可伸缩性以及MPEG-4中描述的组合。好处是减少了服务器的存储容量，减少了用于多播传送的净负载，并在发生传输错误时适度降低了性能。成本是单播传送的净负载增加，并且解码器的计算开销增加。评估结果表明，时间可伸缩性在所有分析技术中的成本最低。它仅稍微增加了单播的净负载，而在解码器中没有任何额外的计算开销。时间可伸缩性可将服务器存储容量和用于多播的网络负载减少约30％，并可以分为两个阶段。所有其他已知的空间和幅度可伸缩性的标准化和非标准化技术都与看起来太高而无法吸引Internet流的成本相关联。因此，目前仅使用时间可伸缩性。某些可伸缩视频编码技术可能对其他应用（其中调查的成本不太相关）感兴趣。

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