Method for Evaluating Digital Video Electromagnetic Information Leakage from Video Cable

作     者：WANG Sen QIU Yang TIAN Jin WANG Sen;QIU Yang;TIAN Jin

作者机构：AECC Aero Engine Control System Institute Electromagnetic Compatibility Laboratory Xidian University 

出 版 物：《Chinese Journal of Electronics》 (电子学报(英文))

年 卷 期：2021年第30卷第5期

页      面：978-985页

核心收录：

学科分类：08[工学] 080203[工学-机械设计及理论] 0802[工学-机械工程] 

主　　题：lead rapid testing method computer video information leakage detection displayed image electrical information equipment evaluating digital video electromagnetic information leakage test spectrum typical image electromagnetic leakage electromagnetic radiation spectrum HDMI cable correlation coefficient electromagnetic emissions digital video broadcasting electromagnetic compatibility digital video cable 

摘      要：Electromagnetic emissions from electrical information equipment may contain useful information and lead to information leakage. In order to detect the electromagnetic information leakage of digital video cable,a rapid testing method for computer video information leakage detection without reconstructing the displayed image is proposed. In this method, the electromagnetic radiation spectrum of typical image transmitted by HDMI cable is simulated. Then the electromagnetic radiation spectrum of the computer when transmitting the same image as the typical image is obtained by conduction and radiation EMC test methods. Finally, the correlation between the spectrum of simulation and the test spectrum is analyzed, and the correlation coefficient is used to judge whether the computer has produced the electromagnetic leakage of video information. The analysis and test results show that when the correlation coefficient is greater than 0.5, the electromagnetic leakage of computer video information can be judged.