机载XGA视频与RGB分量PAL制差分视频的对比研究  

Comparative Study of Airborne XGA Video and RGB Component PAL Differential Video

作　　者：朱鹏程 赵君 胡娜[1] ZHU Peng-cheng;ZHAO jun;HU Na(China National Aeronautical Radio Electronics Research Institute,Shanghai 200233,China)

机构地区：[1]中国航空无线电电子研究所,上海200233

出　　处：《工业技术创新》2020年第1期75-82,共8页Industrial Technology Innovation

摘　　要：XGA视频和RGB分量PAL制差分视频属于平衡信号,可以有效地降低共模电平和差模电平对信号带来的干扰,提高电子产品的电磁兼容性,在机载视频技术中得到广泛应用。为避免设计人员混淆两种视频信号,造成设计错误,介绍了XGA视频和RGB分量PAL制差分视频的工作机制;列举了两种视频在参数上的区别;从视频信号转换和视频信号转码两方面,分析了两种视频的接口电路设计,尤其是指出了视频信号转码中设计细节的差异在于是否应用SCART模式。对两种视频进行了实际测量和验证后表明:XGA视频的同步信号耦合在R、G、B分量中,RGB分量PAL制差分视频的同步信号仅耦合在G分量中,符合各自的视频特性。为视频处理同行提供借鉴和参考。XGA video and RGB component PAL differential video are balanced signals,which can effectively reduce the interferences of common mode level and differential mode level to the signal and improve the electromagnetic compatibility of electronic products,so they are widely used in the airborne video technology.In order to avoid the designers confusing two kinds of video signals and causing design errors,introduced are the working mechanisms of XGA video and RGB pal differential video,and enumerated are the parametric differences between the two kinds of videos.From the two aspects,namely,video signal conversion and video signal transcoding,analyzed are the interface circuit designs of the two kinds of videos,especially pointed out is that the difference of design details in the video signal transcoding is whether to apply the SCART mode.The actual measurement and verification of the two kinds of videos show that the synchronous signal of XGA video is coupled in the R,G and B components,and the synchronous signal of RGB component PAL differential video is only coupled in the G component,which conforms to the respective video characteristics.Provided for the designers is the inspiration on the following video processing direction.

关 键 词：XGA视频 机载视频 RGB分量PAL制差分视频 接口电路设计 SCART模式 

分 类 号：V243.6[航空宇航科学与技术—飞行器设计]