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Wireless Video: An Interlayer Error-Protection-Aided Multilayer Approach

机译:无线视频:一种层间错误保护辅助多层方法

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Video clips captured from realworld scenes exhibit intraframe correlation among their pixels. This correlation can be removed by applying video compression to reduce the required the storage space, transmission bandwidth, bitrate, and power. Layered video coding separates the video sequence into partitions having unequal importance, hence allowing the decoder to progressively refine the reconstructed video quality, when an increased bandwidth is available. On the other hand, compressed video signals are sensitive to channel errors. Therefore, forward error correction (FEC) must be applied when communicating over hostile wireless channels. In addition, based on the fact that the different layers have unequal importance, different-rate FEC codes may be applied to the different layers, leading to unequal error protection (UEP). We propose an interlayer (IL) FEC coding technique combined with UEP, where the lower-importance layers are used for protecting the higher-importance layers in the data-partitioned mode of H.264/advanced video coding (AVC). Explicitly, our simulation results show that the ILcoded system outperforms the traditional UEP system by providing a better video quality for transmission over a wireless eless channel having Eb /N0 of 0 dB, when using our multifunctional multiple-input, multiple-output (MIMO) array.
机译:从现实世界场景中捕获的视频剪辑在其像素之间表现出帧内相关性。通过应用视频压缩来减少所需的存储空间,传输带宽,比特率和功率,可以消除这种相关性。分层视频编码将视频序列分为具有不同重要性的分区,因此,当可用带宽增加时,允许解码器逐步完善重构的视频质量。另一方面,压缩视频信号对频道错误敏感。因此,在通过恶意无线信道进行通信时,必须应用前向纠错(FEC)。另外,基于不同的层具有不相等的重要性的事实,可以将不同速率的FEC码应用于不同的层,从而导致不相等的错误保护(UEP)。我们提出了一种与UEP相结合的层间(IL)FEC编码技术,其中低重要性层用于在H.264 /高级视频编码(AVC)的数据分区模式下保护高重要性层。明确地,我们的仿真结果表明,当使用我们的多功能多输入多输出(MIMO)时,IL编码系统通过为Eb / N0为0 dB的无线信道提供更好的视频质量,从而优于传统的UEP系统数组。

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