Research on Anti-leakage of Computer Video Signal Based on Digital Filtering

QIU Yang; WEI Li-li; TIAN Jin; CHEN Guang-da; QIAN Liu-yu

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Research on Anti-leakage of Computer Video Signal Based on Digital Filtering

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- Research on Anti-leakage of Computer Video Signal Based on Digital Filtering
- Acta Electronica Sinica Vol. 36, Issue 6, Pages: 1188-1192(2008)
- 作者机构：
  
  西安电子科技大学机电工程学院,陕西,西安,710071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP309.1
- Published：2008
- 稿件说明：
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QIU Yang, WEI Li-li, TIAN Jin, et al. Research on Anti-leakage of Computer Video Signal Based on Digital Filtering[J]. Acta Electronica Sinica, 2008, 36(6): 1188-1192.
DOI：

QIU Yang, WEI Li-li, TIAN Jin, et al. Research on Anti-leakage of Computer Video Signal Based on Digital Filtering[J]. Acta Electronica Sinica, 2008, 36(6): 1188-1192. DOI：

摘要

本文针对计算机视频信息泄漏

提出了一种基于数字滤波的防护方法.论文确定了字符带宽、图像可读性等对于数字滤波的约束条件

采用FIR设计了相应的数字滤波器

应用数字滤波器和模拟滤波器的组合滤波

消除了数字滤波器所固有的插入损耗周期性波动的缺点

最后通过试验验证了分析结果

获得了一些具有重要应用价值的结论.

Abstract

A method to prevent leakage from computer’s video information by digital filtering is presented.The constraint conditions for digital filter by bandwidth and readability of character are obtained

and the corresponding digital filter is designed with FIR(Finite Impulse Response).The insertion loss of digital filter fluctuates periodically

composite application of analog and digital filter eliminate that disadvantage.And the measured and simulated results are in good agreement

and some important conclusions are achieved.

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