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arXiv 1801.04853cs.ITmath.IT
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系统感知压缩

System-Aware Compression

Yehuda Dar, Michael Elad, Alfred M. Bruckstein

摘要:

许多信息系统采用有损压缩作为其它处理组件之间的关键中间阶段。虽然重要的失真由系统的输入和输出信号定义,但压缩通常忽略系统结构,因此导致总体次优率失真性能。在本文中,我们提出了一种压缩方法,考虑到一个已知的系统布局,使用线性算子和噪声建模的操作率失真优化。使用交替方向乘法器(ADMM)技术,我们表明,新的全球优化压缩的设计减少到一个标准的压缩的“系统调整”的信号。本质上,所提出的框架利用标准压缩技术来解决噪声信源编码问题的实际设置。我们进一步解释我们的方法的主要思想,通过理论研究的情况下,循环平稳高斯信号。我们提出了一维信号的编码和使用HEVC标准的视频压缩的实验结果,通过对采集-渲染系统的调整显示出显著的增益。

英文摘要:

Many information systems employ lossy compression as a crucial intermediate stage among other processing components. While the important distortion is defined by the system's input and output signals, the compression usually ignores the system structure, therefore, leading to an overall sub-optimal rate-distortion performance. In this paper we propose a compression methodology for an operational rate-distortion optimization considering a known system layout, modeled using linear operators and noise. Using the alternating direction method of multipliers (ADMM) technique, we show that the design of the new globally-optimized compression reduces to a standard compression of a "system adjusted" signal. Essentially, the proposed framework leverages standard compression techniques to address practical settings of the noisy source coding problem. We further explain the main ideas of our method by theoretically studying the case of a cyclo-stationary Gaussian signal. We present experimental results for coding of one-dimensional signals and for video compression using the HEVC standard, showing significant gains by the adjustment to an acquisition-rendering system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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