invictius Posted October 18, 2014 I have an 11 metre run (2 5m cables, a 1m cable with joiners in between) going to my plasma from my gaming PC and when I switch to it I get a sort of coloured ghost effect around some of the image for half a second or so. The colour is kind of the outline of the object which takes up the most space onscreen. Could this damage my tv? 0 Share this post Link to post
fraggle Posted October 18, 2014 Kind of weird that you'd get analogue-like distortions when HDMI is digital. I can't see how it could damage your TV though. 0 Share this post Link to post
FireFish Posted October 18, 2014 Kind of hard reasoning about what it could be when the only things mentioned are TV, PC, Extension Cable... https://www.google.com/search?nts&q=hdmi+ghosting+effect&oq=hdmi+ghosting+effect 0 Share this post Link to post
GreyGhost Posted October 18, 2014 Depending on the quality of the cables you're using, the problem might be an old friend of mine - signal attenuation. 0 Share this post Link to post
Moriarti Posted October 18, 2014 If it only happens right after you switch inputs, it's probably just a thing your TV does and nothing to worry about. If the cables were bad, you wouldn't get any picture at all. 0 Share this post Link to post
flubbernugget Posted October 20, 2014 Wouldn't attenuation cause a more "noisy" distortion? 0 Share this post Link to post
Moriarti Posted October 20, 2014 HDMI is digital. It does not respond to noise the same way an analog signal would. If there's more error in the signal than it can correct for, then you won't get a picture. There's no fuzzy in-between state between good and bad signals like there is with analog. 0 Share this post Link to post
Maes Posted October 21, 2014 That's not entirely true -it's possible to build-in some resilience and fallback capability into a digital signal, at the cost of increased overhead and complexity (e.g. switch between lower and higher bit/signaling rate signals) though it would be strange to use such a scheme for an indoors cable. In any case, it looks like HDMI doesn't include such a scheme, but it's possible to get data errors by using long cables and/or dodgy connectors. In that case, the TV might detect the errors and try to "compensate" for them by replacing digital noise with some sort of filtering and blending with surrounding pixels -which will get you blurry images and "ghosting". 0 Share this post Link to post