Optimal subcarrier allocation for H.264 based scalable video transmission in 4G OFDMA systems

2011 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2011-12-08 DOI:10.1109/ATNAC.2011.6096650

S. Parakh, A. Jagannatham

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引用次数: 13

Abstract

In this paper, we present a novel scheme for optimal OFDMA subcarrier allocation towards video quality maximization employing the paradigm of H.264 based scalable video coding (SVC). We deduce the rate and quality model parameters for video characterization of the SVC extension of the H.264/AVC and propose an optimization framework for sum quality maximization of the transmitted video streams in unicast and multicast 4G scenarios. We derive the closed form solution for optimal quantizer selection towards net video quality maximization subject to rate constraints of the unicast/ multicast users, taking into account the different modulation and coding rates of the multicast groups in the 4G wireless system. This in turn yields the optimal OFDMA time/frequency resource allocation for video multiplexing. In the simulation results section, we specialize our proposed algorithm in the context of WiMAX based 4G video transmission and demonstrate that our algorithm provides significant improvement in video quality over the content agnostic non-scalable equal symbol rate allocation scheme for unicast and multicast scenarios.

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基于H.264的4G OFDMA可扩展视频传输优化子载波分配

本文提出了一种基于H.264可扩展视频编码(SVC)的OFDMA子载波优化分配方案，以实现视频质量最大化。我们推导了H.264/AVC的SVC扩展视频特性的速率和质量模型参数，并提出了在单播和组播4G场景下传输视频流的总质量最大化的优化框架。考虑到4G无线系统中不同的组播组的调制和编码速率，在单播/组播用户的速率约束下，我们推导了最优量化器选择的封闭形式解，以实现网络视频质量最大化。这反过来又为视频多路复用产生最佳的OFDMA时间/频率资源分配。在仿真结果部分，我们将提出的算法专门用于基于WiMAX的4G视频传输，并证明我们的算法在单播和多播场景下，与内容不可知的不可扩展等符号速率分配方案相比，显著提高了视频质量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2011 Australasian Telecommunication Networks and Applications Conference (ATNAC)

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