摘要
视频接口线在传输视频时遵循VESA(Video Electronics Standards Association,视频电子标准协会)视频标准。本文基于视频的场-行特征,提出了一种用于视频接口线辐射信号检测与图像还原的新方法。该方法利用无线电磁频谱信号接收设备,针对TEMPEST频点的采样数据进行时频转换,提取行周期、场起始位置等关键参数,通过视频周期同步,获取场频参数,并进行行跟踪搜索以提取图像帧数据,对其进行灰度处理和多帧叠加,最终还原视频图像。
Video interface cables follow the VESA(Video Electronics Standards Association)standards when transmitting video signals.A novel method is proposed in this paper for detecting radiated signals from video interface cables and restoring video images based on frame-line characteristics carried by the signals.The method utilizes radio electromagnetic spectrum signal receiving equipment to sample data at TEMPEST frequency points,performing time-frequency conversion to extract critical parameters such as line period and frame start position.By achieving video period synchronization and extracting frame frequency parameters,line tracking and search are conducted to retrieve image frame data.These data are processed for grayscale transformation and multi-frame superimposition,ultimately restoring the video image.
作者
严伟
顾欢欢
YAN Wei;GU Huanhuan(Nanjing Sinovatio Technology Co.,Ltd.)
出处
《江苏通信》
2025年第1期43-47,共5页
Jiangsu Communication
