An Evaluation of Bitrate Adaptation Methods for HTTP Live Streaming
An Evaluation of Bitrate Adaptation Methods for HTTP Live Streaming
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DOI：
10.1109/jsac.2014.140403
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发表时间：
2014-03
影响因子：
16.4
通讯作者：
T. Thang;Hung T. Le;A. Pham;Yong Man Ro
中科院分区：
文献类型：
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作者：
T. Thang;Hung T. Le;A. Pham;Yong Man Ro
如今，HTTP 流媒体已成为一种经济高效的多媒体传输方式。为了适应网络和终端，提供商应该生成原始视频以及相关元数据的多种表示形式。最近，出现了多种支持自适应HTTP流的适配方法。在本文中，我们研究了实时视频流背景下的典型适应方法。我们首先讨论典型适应方法之间的权衡。然后不仅根据比特率和缓冲行为进行评估和比较，还根据对最终用户的感知影响进行评估和比较。研究发现，感知影响不仅取决于适应方法，还取决于内容本身。我们还表明，表示集的准备可能会影响某些适应方法的行为。
HTTP streaming has become a cost-effective means for multimedia delivery nowadays. For adaptivity to networks and terminals, a provider should generate multiple representations of an original video as well as the related metadata. Recently, there have been various adaptation methods to support adaptive HTTP streaming. In this paper, we investigate typical adaptation methods in the context of live video streaming. We first discuss the trade-off among typical adaptation methods. The evaluation and comparison are then carried out not only in terms of bitrate and buffer behaviors but also in terms of the perceptual impact on end users. It is found that the perceptual impact depends not only on adaptation method but also on the content itself. We also show that the preparation of representation sets may affect the behaviors of some adaptation methods.