Why does S-video only work on digital signals?
A – 4DTV video is one of the highest quality video pictures available in both analog and digital modes. To maintain this quality, the S-video only works on the digital video broadcasts. The video that is displayed by your TV is actually in two components, chroma and luma. Analog transmissions combine these before they arrive at your satellite receiver. It takes extra hardware to split these, which can actually reduce the quality of the video. S-video was developed to take advantage of digital signals that can be stored by separate components. Laser disc players were the first products to use S-video output to take advantage of this separation. The 4DTV receiver also takes advantage of the separate components, but only on digital signals.
