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Efficient video transmission over wireless multiple antenna systems.

机译：通过无线多天线系统进行有效的视频传输。

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摘要

I consider the problem of packet-based scalable video transmission over Multiple-Input Multiple-Output (MIMO) systems. Scalable video encoder produces a bitstream that can be partitioned into layers that form a hierarchy. In this work I use the scalable extension of H.264/AVC (SVC) that provides a combined temporal, quality and spatial scalability. It provides superior compression e+/-ciency and have error-resilient network adaptation layer (NAL) structure for transmission over varied networks.; In this work, I first develop a method for the estimation of the distortion of the received video and propose different error concealment schemes. I show the accuracy of the distortion estimation algorithm in comparison with simulated wireless video transmission with packet errors. The scalable decoder distortion estimation algorithm at the encoder plays a key role in the proposed video transmission system.; I also propose a bandwidth constrained video transmission over MIMO system with orthogonal space-time block codes (O-STBC). The O-STBC 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, I take advantage of the hierarchical structure of SVC to attain the optimal solution for each group of pictures (GOP) of the video sequence. I incorporate the estimated decoder distortion to optimally select the application layer parameter, i.e., quantization parameter (QP), and physical layer parameters, i.e., channel coding rate and modulation type for wireless video transmission.; Besides video transmission using O-STBC, I have considered video transmission over MIMO system using full-rate full-diversity quasi-orthogonal space-time block codes (quasi-orthogonal STBCs). These codes provide higher rate as compared to the O-STBC with a slight increase in the decoding complexity. In this work I show clearly the advantage of using the quasi-orthogonal STBC over O-STBC in a wireless video system in spite of the use of non-optimal signal constellation structure. The performance results are obtained after addressing the bandwidth allocation problem which employs the scalable decoder distortion estimation algorithm for the optimal selection of the application layer and physical layer parameters.; As another part of this work, I show the performance gain by using the newly developed Hybrid Scalable/Multiple-Description Codec (HSMDC) over classical scalable codecs for optimal wireless video transmissions. HSMDC combines the functionality of scalable and multiple-description codecs. It produces a base layer and multiple-description enhancement layers. Any of the enhancement layers can be decoded (in a non-hierarchical manner) with the base layer to improve the reconstructed video quality. Two different channel coding schemes, Rate-Compatible Punctured Convolutional (RCPC)/Cyclic Redundancy Check (CRC) coding and, product code Reed Solomon (RS)+RCPC/CRC coding are used for unequal error protection of the layered bitstream. Optimal allocation of the bitrate between source and channel coding is performed for discrete sets of source coding rates and channel coding rates. Experimental results are presented for a wide range of channel conditions and show the effectiveness of using hybrid scalable/multiple-description coding for wireless transmission.
机译：我考虑了在多输入多输出（MIMO）系统上基于分组的可伸缩视频传输的问题。可伸缩视频编码器产生一个比特流，该比特流可以划分为形成层次结构的层。在这项工作中，我使用H.264 / AVC（SVC）的可扩展性扩展，它提供了时间，质量和空间可扩展性的组合。它提供出色的压缩e +/- ciency，并具有防错的网络自适应层（NAL）结构，可在各种网络上传输。在这项工作中，我首先开发了一种估计接收视频失真的方法，并提出了不同的错误隐藏方案。与具有分组错误的模拟无线视频传输相比，我展示了失真估计算法的准确性。编码器处的可伸缩解码器失真估计算法在所提出的视频传输系统中起着关键作用。我还提出了使用正交空时分组码（O-STBC）的MIMO系统上的带宽受限视频传输。 O-STBC提供空间分集，并保证块码内不同符号的独立传输。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，我利用SVC的层次结构来为视频序列的每组图片（GOP）获得最佳解决方案。我结合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），以及物理层参数，即无线视频传输的信道编码率和调制类型。除了使用O-STBC进行视频传输外，我还考虑了使用全速率全分集准正交空时分组码（准正交STBC）在MIMO系统上进行视频传输。与O-STBC相比，这些代码提供了更高的速率，并且解码复杂度略有增加。在这项工作中，我清楚地显示了尽管使用了非最佳信号星座图结构，但在无线视频系统中使用准正交STBC优于O-STBC的优势。在解决带宽分配问题后获得性能结果，该问题采用可伸缩的解码器失真估计算法来最佳选择应用层和物理层参数。作为这项工作的另一部分，我通过在经典可伸缩编解码器上使用最新开发的混合可伸缩/多描述编解码器（HSMDC）来显示性能提升，以实现最佳的无线视频传输。 HSMDC结合了可伸缩和多描述编解码器的功能。它产生一个基础层和多个描述增强层。任何增强层都可以与基础层一起解码（以非分层方式），以改善重建的视频质量。两种不同的信道编码方案，即速率兼容穿刺卷积（RCPC）/循环冗余校验（CRC）编码和乘积码Reed Solomon（RS）+ RCPC / CRC编码，用于分层比特流的不均等错误保护。对于源编码速率和信道编码速率的离散集合，执行源编码和信道编码之间的比特率的最佳分配。给出了针对各种信道条件的实验结果，并显示了使用混合可伸缩/多描述编码进行无线传输的有效性。

著录项

  • 作者

    Jubran, Mohammad K.;

  • 作者单位

    State University of New York at Buffalo.$bElectrical Engineering.;

  • 授予单位 State University of New York at Buffalo.$bElectrical Engineering.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2007
  • 页码 116 p.
  • 总页数 116
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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