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首页> 外文期刊>IEEE Transactions on Broadcasting >Cooperation Between LDM-Based Terrestrial Broadcast and Broadband Unicast: On Scalable Video Streaming Applications
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Cooperation Between LDM-Based Terrestrial Broadcast and Broadband Unicast: On Scalable Video Streaming Applications

机译：基于LDM的地面广播和宽带单播的合作：可伸缩视频流应用

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摘要

This article investigates the reliability gain of broadcast (BC)/broadband (BB) cooperation for mobile scalable video streaming. A specific form of BC-BB cooperation is introduced, which is referred to as cooperative casting. The proposed system primarily utilizes a BC transmission for streaming, while BB backup transmissions are requested whenever the BC signal is not decodable. For BC deliveries in this system, a cross-layer collaboration between scalable video coding (SVC) and layered-division multiplexing is used to improve spectral efficiency by coupling their hierarchical structures. In this end, in tandem with designing the uplink requesting rules based on channel status, delivery performance of the cooperative casting is analytically evaluated in a probabilistic framework. The system design and analyses presented in this article focus on the service continuity in a mobile and time-varying channel, where the physical aspects, such as delayed unicast response and inter-carrier interference, are carefully taken into account. Compared to the standalone network transmissions, the cooperative casting is numerically verified to better prevent the delivery failures in high-speed mobile channels, especially when the SVC layer-combined (full-scale video) service is intended. Furthermore, it is also shown that relaxing the criteria for the BB stream requesting can reduce delivery failures substantially, while it increases transmission redundancy.
机译：本文调查了移动可扩展视频流的广播（BC）/宽带（BB）合作的可靠性增益。介绍了一种特定形式的BC-BB合作，称为合作铸造。该提出的系统主要利用BC传输来流，而每当BC信号不可解码时请求BB备份传输。对于该系统中的BC交付，可伸缩视频编码（SVC）和分层分割复用之间的跨层协作用于通过耦合其分层结构来提高光谱效率。在此，在基于信道状态设计上行链路请求规则的串联中，在概率框架中分析协同铸件的传递性能。本文介绍的系统设计和分析专注于移动和时变信道中的服务连续性，其中仔细考虑了诸如延迟单播响应和载波间干扰的物理方面。与独立网络传输相比，协作铸件在数量上验证以更好地防止高速移动通道中的输送失败，特别是当打算SVC层组合（全尺度视频）服务时。此外，还示出了放松BB流请求的标准可以基本上减少输送失败，而它增加了传输冗余。

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