Whilst watching digital tv i find that when it is windy the picture is all over the place, yet normal tv is fine
2006-12-22 23:07:02 · 6 answers · asked by bty541233 2 in Entertainment & Music ➔ Television
That's a problem with digital signals. Within the digital TV signal, sync and other decoding information are sent so the unit can keep the video/audio and other information synchronised. If a small amount of information is lost (Say a couple of bit's) an interpolation circuit places some information in it's place, mostly this will go unnoticed but if too much information is lost or the signal becomes too weak for any reason the decoder simply looses it's place and freezes the picture until it can resume again.
This happens to any digital equipment, CD players, DVD' etc...
With an analogue signal it doesn't matter if the aerial moves and the signal weakens. All the TV has to do is amplify the signal and demodulate it and because it is an analogue signal there is no start and end point, it's just continuous.
This is quite hard to explain without going into detail about how a digital signal is composed and the process involved with cleaning and decoding it, but hopefully it gives you an idea of why digital TV tends to freeze.
2006-12-22 23:19:12 · answer #1 · answered by randombushmonkey 3 · 19⤊ 1⤋
If you are picking up freeview at the moment, I cant see the problem - after all, you will be getting both a digital signal as well as the analogue, which will be switched off. Yes, some aerials may need upgrading, but I think there is a bit of scaremongering going on. People think that they need a new TV, when many older TVs can take a digibox as it is, as long as there is a scart connection. Shops probably wont tell you this, they want money in the tills. It reminds me a bit of when Channel 5 started. There was all this nonsense of services offered to get your TV ready for the channel (costing money, of course!) when all it took was tuning in your TV to the correct channel number, there was plenty of information freely available as to what numbers needed changed and all it took was retuning, using the TV manual if required. I'm pretty sure if you get a digital signal now, you should still get it when they turn off the analogue.
2016-05-23 01:29:08 · answer #2 · answered by Anonymous · 0⤊ 0⤋
terrestrial is affected to but as it's sent in an analogue wave form the signal can still be reproduced but with interference just like a radio when it's not quite tuned, with digital if the whole digital signal can't be received it can't decode properly and thus goes nuts
2006-12-22 23:11:18 · answer #3 · answered by Boothster 2 · 4⤊ 3⤋
I do not know, but it really gets on my nerves. Not looking
forward to analogue switch off.
2006-12-23 01:55:25 · answer #4 · answered by Anonymous · 6⤊ 4⤋
can be a problem maybe the dish is loose i dont have this problem but if its stormy weather i have a problem with reception
2006-12-22 23:10:06 · answer #5 · answered by julie t 5 · 0⤊ 9⤋
so your all saying they haven't got it right yet????
2006-12-22 23:24:18 · answer #6 · answered by srracvuee 7 · 6⤊ 6⤋