Sender-adaptive and receiver-driven layered multicast for scalable video over the Internet
Sender-adaptive and receiver-driven layered multicast for scalable video over the Internet
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DOI：
10.1109/tcsvt.2005.844454
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发表时间：
2005-04
影响因子：
8.4
通讯作者：
Qian Zhang;Q. Guo;Q. Ni;Wenwu Zhu;Ya-Qin Zhang
中科院分区：
文献类型：
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作者：
Qian Zhang;Q. Guo;Q. Ni;Wenwu Zhu;Ya-Qin Zhang
本文提出并分析了一种新的基于Internet的视频多播系统结构，即发送端自适应接收端驱动的分层多播（SARLM）。在SARLM中，视频源的发送方将由可伸缩编解码器和信道编解码器编码的视频数据分成多个数据流，每个数据流对应于单独的多播组。发送方可以基于通过反馈收集的接收方的网络参数来动态地调整视频序列被分割的方式。同时，接收器可以基于修改的分组对技术来估计可用带宽，并且通过根据其网络条件动态地订阅给定的部分或全部数据流来选择重组和回放用于给定质量水平的视频序列。为了优化发送方的自适应策略，我们引入了一个质量空间（Q-Space）模型来描述和分析不同的SARLM层的发送速率和接收到的视频质量之间的数学关系由一个给定的接收机确定其网络特性，包括可用带宽和丢包率。我们的仿真结果表明，在相同的网络拓扑结构和条件下，SARLM架构可以实现更高的网络吞吐量和更好的视频质量在接收端比现有的方法。
In this paper, we propose and analyze a new system architecture for video multicast over Internet, namely, the sender-adaptive and receiver-driven layered multicast (SARLM). In SARLM, the sender of a video source splits the video data coded by a scalable codec and a channel codec into multiple data streams, each of which corresponds to a separate multicast group. The sender can adjust the way in which the video sequence is split dynamically based on the receivers' network parameters collected through feedback. Meanwhile, a receiver can estimate available bandwidth based on a modified packet-pair technique and choose to reassemble and playback the video sequence for a given quality level by dynamically subscribing a given part or all of the data streams according to its network conditions. To optimize the sender's adaptation strategy, we introduce a quality-space (Q-Space) model to describe and analyze the mathematical relationship between the sending rate of different SARLM layers and the video quality received by a given receiver identified by its network characteristics including available bandwidth and packet loss ratio. Our simulation results demonstrate that, under the same network topology and condition, the SARLM architecture can achieve higher network throughput and better video qualities on the receiver side than the existing approaches.