视频红信号频谱识别中波峰搜索算法研究  

Peak finding in the identify of video red signal spectrum

作　　者：熊伟[1] 吕英华[1] 

机构地区：[1]北京邮电大学电子工程学院,北京100876

出　　处：《软件》2012年第11期190-193,共4页Software

基　　金：国家自然基金资助项目(61072136)

摘　　要：视频辐射信息中包含重要的视频泄露信息,通过对视频辐射频谱的分析,达到对视频辐射信息的识别。通过对视频信息的频谱特征分析,可知场频信号被行频信号调制,而行频信号被点频信号调制。所以可以在行频的谱线中发现场频信息,在点频频谱的波瓣中发现行频的信息。本文通过两次在不同分辨率下对频谱进行波峰搜索,寻找等间隔谱线族,达到对视频信号频谱识别的目的,其中波峰搜索是采用最小二乘曲线拟合的方法来进行波峰搜索。Video radiation contains important video leakage information. Based on analysis of video radiation spectrum, video radiation can be recognized. By analysis of the spectrum of the video information, it shows that that the field frequency signal is a line frequency signal modulation, while the line frequency signal is point-frequency signal modulation. So line frequency spectra can be found in field frequency, line frequency information can be found in the point spectrum lobe. This paper, through two leaking findings for spectrum in different resolution, and searching for interval line family, achieves the goal of radiation signal spectrum recognition, in which the Curve Least Squares Fitting method are adopted for the leak findings algorithm.

关 键 词：电磁截获 波峰搜索 曲线拟合 视频信号 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]