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首页> 外文期刊>Journal of visual communication & image representation >A solution to efficient power allocation for H.264/SVC video transmission over a realistic MIMO channel using precoder designs
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A solution to efficient power allocation for H.264/SVC video transmission over a realistic MIMO channel using precoder designs

机译：使用预编码器设计的有效MIMO信道上的H.264 / SVC视频传输的有效功率分配解决方案

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摘要

In this paper we propose a novel scheme for real time SVC-based video transmission over MIMO channels in the context of Joint Source Channel Coding (JSCC). This scheme compares the transmission of the H.264/SVC video over four precoder solutions, namely Max-SNR, WF, QoS and E-dmrn. We exploit the high flexibility of the QoS precoder to minimize the total distortion of the received video. The proposed adaptive QoS precoder takes into account the scalability of the H.264/SVC standard jointly with the instantaneous MIMO channel statue. Finally, the proposed scheme is evaluated over both statistical and time varying realistic MIMO channels. This study provides the performance of these four precoder designs in term of BER, ML decoder complexity and the quality of the received video. We show that the precoder solutions providing the best BER performance are not usually the most appropriate for real time video transmission. However, the adaptive QoS precoder which uses three configurations, by considering both the importance of the video bit-stream and the channel statue, provides the best Rate-Distortion performance regardless the channel conditions. We assess the accuracy of these four precoder solutions against channel estimation errors over time varying realistic MIMO channel. The results shows that the adaptive QoS precoder remains robust against channel estimation errors even at high mobility speed.
机译：在本文中，我们提出了一种在联合源信道编码（JSCC）上下文中通过MIMO信道进行基于SVC的实时视频传输的新颖方案。该方案比较了四个预编码器解决方案（即最大SNR，WF，QoS和E-dmrn）上H.264 / SVC视频的传输。我们利用QoS预编码器的高度灵活性来最小化接收视频的总失真。所提出的自适应QoS预编码器将H.264 / SVC标准的可伸缩性与瞬时MIMO信道状态结合在一起考虑。最后，在统计和时变现实MIMO信道上对提出的方案进行了评估。这项研究就BER，ML解码器复杂度和接收视频的质量而言，提供了这四种预编码器设计的性能。我们表明，提供最佳BER性能的预编码器解决方案通常不是最适合实时视频传输的解决方案。然而，通过考虑视频比特流和信道状态的重要性，使用三种配置的自适应QoS预编码器不管信道条件如何，都可以提供最佳的速率失真性能。我们针对随时间变化的实际MIMO信道随信道估计误差评估了这四种预编码器解决方案的准确性。结果表明，即使在高移动速度下，自适应QoS预编码器仍能抵抗信道估计错误。

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