HTTP adaptive streaming (HAS) can achieve low latency for live streaming with the Common Media Application Format. However, the legacy mechanisms inaccurately measure the available bandwidth because the download time is affected by not only the network but also idle times between chunks at the live encoder side. These wrong measurements may condemn users to a low quality-of-experience (QoE). This letter presents a HAS client with a novel bandwidth measurement heuristic. Our experiments show that it provides a better QoE with fewer video freezes and higher video quality while achieving a live latency down to one second in bandwidth-limited networks.

中文翻译：

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带宽受限网络中的HTTP低延迟实时流

HTTP自适应流（HAS）可以使用通用媒体应用格式实现实时流的低延迟。然而，由于下载时间不仅受到网络的影响，而且还受到实时编码器侧各块之间的空闲时间的影响，因此传统机制无法准确地测量可用带宽。这些错误的测量结果可能会使用户感到体验质量（QoE）低。这封信向HAS客户展示了一种新颖的带宽测量启发式方法。我们的实验表明，它在带宽受限的网络中提供了更好的QoE，具有更少的视频冻结和更高的视频质量，同时将实时延迟降低到一秒钟。