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Low-complexity mode selection for rate-distortion optimal video coding.

机译:低复杂度模式选择,用于速率失真最佳视频编码。

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摘要

The primary objective of this thesis is to provide a low-complexity rate-distortion optimal coding mode selection method in digital video encoding. To achieve optimal compression efficiency in the rate-distortion framework with low computational complexity, we first propose a rate-distortion model and then apply it to the coding mode selection problem. The computational complexity of the proposed method is very low compared to overall encoder complexity because the proposed method uses simple image properties such as variance that can be obtained easily. Also, the proposed method gives significant PSNR gains over the mode selection scheme used in TM5 for MPEG-2 because the rate-distortion model considers rate constraints of each mode as well as distortion. We extend the model-based mode selection approach to motion vector selection for further improvement of the coding efficiency.; In addition to our theoretical work, we present practical solutions to real-time implementation of encoder modules including our proposed mode selection method on digital signal processors. First, we investigate the features provided by most of the recent digital signal processors, for example, hierarchical memory structure and efficient data transfer between on-chip and off-chip memory, and then present practical approaches for real-time implementation of a video encoder system with efficient use of the features.
机译:本文的主要目的是提供一种数字视频编码中低复杂度失真率最优的编码方式选择方法。为了在低速率复杂度的速率失真框架中获得最佳压缩效率,我们首先提出了速率失真模型,然后将其应用于编码模式选择问题。与总体编码器复杂度相比,该方法的计算复杂度非常低,因为该方法使用了简单的图像属性,例如可以轻松获得的方差。此外,由于速率失真模型考虑了每种模式的速率约束以及失真,因此与TM5中用于MPEG-2的模式选择方案相比,所提出的方法可提供显着的PSNR增益。我们将基于模型的模式选择方法扩展到运动矢量选择,以进一步提高编码效率。除了我们的理论工作之外,我们还提供了编码器模块实时实施的实用解决方案,包括我们在数字信号处理器上提出的模式选择方法。首先,我们研究大多数最新数字信号处理器提供的功能,例如,分层存储结构以及片上和片外存储器之间的有效数据传输,然后提出用于视频编码器实时实现的实用方法有效利用功能的系统。

著录项

  • 作者

    Kim, Hyungjoon.;

  • 作者单位

    Georgia Institute of Technology.;

  • 授予单位 Georgia Institute of Technology.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2007
  • 页码 88 p.
  • 总页数 88
  • 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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