Prediction-based channel zapping latency reduction techniques for IPTV systems — A survey
Prediction-based channel zapping latency reduction techniques for IPTV systems — A survey
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IPTV 系统基于预测的频道切换延迟减少技术 — 一项调查
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Hammad Majeed
中科院分区：
文献类型：
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作者：
M. Ahmad;Junaid Qadir;N. Rehman;A. Baig;Hammad Majeed
互联网协议电视- IPTV是传统电视的一种新形式，其中电视内容使用基于IP的网络来传送，这些网络被管理以提供所需的服务质量、体验、安全性、交互性和可靠性水平。服务质量（QoS）和体验质量（QoE）是实现IPTV客户满意度所需要确保的两个主要因素。频道切换延迟是影响IPTV用户QoE的主要问题。在IPTV系统中，由于IGMP加入/离开时延、视频流编解码时间、网络抖动和业务负载等因素，切换频道时会出现延迟。这些因素阻碍了IPTV大规模部署的进程，并给IPTV带来了可扩展性问题。为了解决IPTV频道切换延迟问题，不同的研究人员已经提出了许多方法，但由于带宽限制和视频质量问题，每种方法都有自己的权衡。在本文中，我们调查了目前的最先进的这一线程的研究，并提出了在文献中提出的各种方法背后的见解，以解决增加通道切换时间的问题。最后，我们还指出了开放的研究问题和未来的研究领域。
Internet Protocol Television — IPTV is a new form of traditional TV, in which TV content is delivered using IP based networks which are managed to provide the required level of quality of service, experience, security, interactivity and reliability. Quality of Service (QoS) and Quality of Experience (QoE) are the two major factors which need to be ensured in order to achieve IPTV customer satisfaction. Channel zapping latency is the major problem which affects QoE for IPTV users. In IPTV systems while switching channels, a delay occurs due to different factors like IGMP Join/Leave latency, video steam encoding and decoding time, network jitter and traffic load. These factors hinder the process of IPTV deployment at large scale and pose scalability issues to IPTV. In order to solve IPTV channel zapping latency problem, a number of approaches have been contributed by different researchers but due to bandwidth limitation and video quality issues, every approach has its own tradeoff. In this paper, we survey the current state-of-art in this thread of research and present the insights behind various approaches that have been proposed in literature to solve the problem of increased channel zapping time. In conclusion, we also point out open research questions and future research areas.