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Low-delay low-complexity bandwidth-constrained wireless video transmission using SVC over MIMO systems

机译:使用sVC over mImO系统的低延迟,低复杂度,带宽受限的无线视频传输

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摘要

We propose an efficient strategy for the transmission of scalable video over multiple-input multiple-output (MIMO) wireless systems. In this paper, we use the latest scalable H.264 codec (SVC), which provides combined temporal, quality and spatial scalability. At the transmitter, we estimate the decoded video distortion for given channel conditions taking into account the effects of quantization, packet loss and error concealment. The proposed scalable decoder distortion algorithm offers low delay and low complexity. The performance of this method is validated using experimental results. In our proposed system, we use a MIMO system with orthogonal space-time block codes (O-STBC) that provides spatial diversity and guarantees independent transmission of different symbols within the block code. The bandwidth constrained allocation problem considered here is simplified and solved for one O-STBC symbol at a time. Furthermore, we take the advantage of the hierarchical structure of SVC to attain the optimal solution for each group of pictures (GOP) of the videosequence. We incorporate the estimated decoder distortion to optimally select the application layer parameter, i.e., quantization parameter (QP), and physical layer parameters, i.e., channelcoding rate and modulation type for wireless video transmission
机译:我们提出了一种在多输入多输出(MIMO)无线系统上传输可伸缩视频的有效策略。在本文中,我们使用了最新的可伸缩H.264编解码器(SVC),它提供了组合的时间,质量和空间可伸缩性。在发射机处,我们考虑到量化,丢包和错误掩盖的影响,针对给定的信道条件估计了解码后的视频失真。所提出的可伸缩解码器失真算法提供了低延迟和低复杂度。实验结果验证了该方法的性能。在我们提出的系统中,我们使用具有正交空时分组码(O-STBC)的MIMO系统,该系统提供空间分集并保证在分组码内独立传输不同符号。一次考虑到一个O-STBC符号,简化并解决了这里考虑的带宽受限分配问题。此外,我们利用SVC的分层结构来为视频序列的每组图片(GOP)获得最佳解决方案。我们合并了估计的解码器失真,以最佳地选择应用层参数(即量化参数(QP))和物理层参数(即无线视频传输的信道编码率和调制类型)

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