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首页> 外文期刊>電子情報通信学会技術研究報告. テレコミュニケ-ションマネジメント. Telecommunication Management >Adaptive playout buffer algorithm for enhancing perceived quality of streaming applications
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Adaptive playout buffer algorithm for enhancing perceived quality of streaming applications

机译:自适应播放缓冲算法,用于增强流媒体应用的感知质量

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摘要

An end-to-end packet delay in the Internet is an important performance parameter, because it heavily affects the quality of real-time applications. In the current Internet, however, because the packet transmission qualities (e.g., transmission delays, jitters, packet losses) may vary dynamically, it is not easy to handle a real-time traffic. In UDP based real-time applications, a smoothing buffer (playout buffer) is typically used at a client host to compensate for variable delays. The issue of playout control has been studied by some previous works, and several algorithms controlling the playout buffer have been proposed. These studies have controlled the network parameters (e.g., packet loss ratio and playout delay), not considered the quality perceived by users. In this paper, we frst clarify the relationship between Mean Opinion Score (MOS) of played audio and network parameters (e.g., packet loss, packet transmission delay, transmission rate). Next, utilizing the MOS function, we propose a new playout buffer algorithm considering user's perceived quality of real-time applications. Our simulation and implementation tests show that it can enhance the perceived quality, compared with existing algorithms.
机译:Internet的端到端数据包延迟是一个重要的性能参数,因为它严重影响了实时应用的质量。然而,在当前的因特网中,因为分组传输质量(例如,传输延迟,抖动,分组损耗)可能会动态地变化,因此不容易处理实时流量。在基于UDP的实时应用程序中,平滑缓冲区(播放缓冲区)通常在客户端主机上使用以补偿可变延迟。一些以前的作品研究了播出控制的问题,并且已经提出了一种控制播出缓冲器的几种算法。这些研究控制了网络参数(例如,丢包比和播放延迟),而不是被用户感知的质量。在本文中,我们FRST阐明了播放音频和网络参数的平均意见分数(MOS)之间的关系(例如,丢包,分组传输延迟,传输速率)。接下来,利用MOS功能,我们提出了一种考虑用户的实时应用程序质量的新播出缓冲算法。我们的仿真和实施测试表明,与现有算法相比,它可以提高感知质量。

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