September 10, 2015
For many years, ‘interfacing’ a video signal meant plugging in a yellow RCA or silver BNC connector that carried composite video. As picture resolution went up, computers became commonplace at work and home, and the term ‘progressive scan’ entered the lexicon, we saw the birth of S-video and then component video (YPbPr and RGB).
So we adapted, building switching and distribution gear that could handle one-, two-, and three-wire formats. All was well and good…until ‘digital’ made its grand entrance about 15 years ago.
Now, we have digital versions of component and RGB video, starting with the Digital Video Interface (DVI) and moving to High Definition Multimedia Interface (HDMI), DisplayPort, and the new superMHL interface that (according to the MHL Alliance) will start appearing on televisions as soon as December.
If I’m a consumer, I mostly don’t care about any of this. As long as I can plug in my set-top box, Blu-ray player, and other gadgets with the right..Read more