The voltage changes in the different signals along this string corresponds with the dots (commonly but somewhat incorrectly referred to as pixels) as they're drawn in horizontal lines across the screen. When an analog video signal is sent to a display regardless of its method of transmission (Composite, S-Video, RGBx, YPbPr) you can think of it as multiple continuous strings of AC voltages. So in the section above there's a little bit of explanation about what sync does, but let's break it down just a little further. The Vertical Sync is a timing pulse that tells the display when it has reached the end of a frame (or field) and to begin drawing at the top of the screen again.The Horizontal Sync is a timing pulse that tells the display when it has reached the end of a line and to start drawing the picture on the next line below it.The Red, Green and Blue voltages tell the screen how saturated each of those colors are for each dot.The Luminance voltage tells the screen how bright (or dark) the dot is.They're not always called by these names because the different formats combine them differently for transmission, but the elements are all there. All color analog video signals carry these values. The Traditional Recipe For Analog VideoĪn analog display requires (6) elements to draw a color video image correctly: Red, Green, Blue, Luminance, Horizontal Sync, and Vertical sync. If you feel I have misrepresented or provided misleading information, I'm interested in hearing from you (as long as you're prepared to keep emotion out of it and maintain some degree of civility). The great thing about discourse is hearing the ideas of the people who disagree with you and seeing if your own ideas stand up to them or fall apart. There is a "right" answer to which SCART cables you should buy, but some people aren't going to like it, and aren't going to like that I say it. I have not been without fault in unintentionally spreading misinformation on this topic in the past, but I have endeavored to embrace correction. I don't have a reputation to stake against some of those who are disagreeing with me, but I make my intentions and motivations clear, and will gladly accept feedback if any of my facts are objectively wrong. While a person's reputation and expertise is definitely a good reason to take their advice, you also need to consider whether that person is motivated by the same goals as you are. ![]() It seems the issue of proper construction of RGB SCART cables, and concurrently the right of RGB SCART cables to even exist has many feelings, hyperbole and misinformation entangled within it. My sincerest intention is to not only represent my own opinions along with the facts that drive them but also faithfully represent the viewpoint of those who differ with me. If all you want is the TL DR, just skip to the end of the article for the readout. The goal of this article is 1) to provide a self-contained explanation of analog video synchronization signals which includes why and how they interact with the rest of the video process, 2) to provide enough information for people to choose the right cables for their classic gaming consoles which includes addressing the reasons for the strong opinions that exist on this topic.
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