A new approach for the construction of ALM trees using layered video coding
A new approach for the construction of ALM trees using layered video coding
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DOI：
10.1145/1099384.1099393
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发表时间：
2005-11
期刊：
影响因子：
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通讯作者：
Yohei Okada;Masato Oguro;J. Katto;S. Okubo
中科院分区：
文献类型：
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作者：
Yohei Okada;Masato Oguro;J. Katto;S. Okubo
提出了一种基于分层视频编码的应用层组播树构造方法。该机制适用于xDSL和CATV等异构环境中的用户，这些环境中的上传和下载速度不同。我们指出了一些问题，在这些环境中的应用层组播，并显示他们的解决方案，在两个阶段。首先，我们重新定义的“度参数”，原来指定的单速率流的主机可以发送的数量，以反映非对称链路的属性，并容纳分层流。其次，我们开发了一个有效的树构造算法，使用更新的度参数，最大限度地提高所有主机的总吞吐量。使用NS-2的仿真证明了我们的建议在吞吐量，延迟和开销的改善。并进行了软件实现，验证了主观质量的改善。
This paper presents a novel approach for efficient tree construction in ALM (Application Layer Multicast) using layered video coding. This mechanism is suitable for the users in heterogeneous environment such as xDSL and CATV, where upload and download speeds are different. We point out some problems in these environments of the ALM and show their solutions at two stages. First, we redefine the "degree parameter" which originally specifies the number of single rate streams the host can transmit, to reflect asymmetric link properties and to accommodate layered streams. Second, we develop an efficient tree construction algorithm using the renewed degree parameter, which maximizes total throughput of all hosts. Simulations using NS-2 prove improvement in throughput, delay and overhead by our proposal. Software implementation is also carried out, and subjective quality improvement is verified.