15" LCD TV with Freeview built in £169.99

annie12

Has anyone got one of these? I bought one & the timing is a couple of seconds behind our other tv's, one of which is also an lcd.

caverncity

annie12 wrote:

Has anyone got one of these? I bought one & the timing is a couple of seconds behind our other tv's, one of which is also an lcd.

what you mean is the sound goes out of sync. I too have one and it also goes out about a few seconds, especially if its been on the same channel for a while, to fix it I just change over and back again.
You will find this happens only on digital channels, sky does it as well, i have had a few dvb-t tv's and STB's and they do go out of sync some more than others.

Kilty_2

If your other TVs are fed from analogue sources not digital then they seem "faster" then digital sources ie something will happen on the analogue TV then the same thing will happen on the digital one, second or two of a difference.

Always been the case, I'm not entirely sure why though.

annie12

Thanks Caverncity, the tv is in our son's bedroom & if it's on the same channel as ours in our bedroom it's like having an echo. Our LCD tv downstairs is ok? When you say it only happens on digital channel, what do you mean? As my son was watching I'm a celebrity before & the speaking was out, like it had been dubbed? Sorry to sound thick

caverncity

annie12 wrote:

Thanks Caverncity, the tv is in our son's bedroom & if it's on the same channel as ours in our bedroom it's like having an echo. Our LCD tv downstairs is ok? When you say it only happens on digital channel, what do you mean? As my son was watching I'm a celebrity before & the speaking was out, like it had been dubbed? Sorry to sound thick

ah I see what you mean, digital channels are always a couple of seconds out compared to analogue channels so if you say have an analogue TV downstairs and a freeview tv or box upstairs then you will find it does sound like an echo with the digital lagging behind by a few seconds.

Sometimes when the door of the living room was open and my daughter had her tv on upstairs it did become annoying when you knew what was going to be said on the TV downstairs.


When I refered to "out of sync" digital tvs do sometimes go out.

caverncity

Why are digital broadcasts delayed by a second or two when compared to analogue ones?
There are two separate causes of delay, which can add together.
The first are the digital transmitting and receiving processes which introduce delays as an integral part of the way they work. These delays vary slightly between digital platforms and even between receivers as they are mostly due to error handling and correction.
The second is the time taken to send signals to a satellite and receive them again on the ground. Many of the BBC's digital programme distribution networks use satellite to get the signals from their origin to the transmission point. There is, of course, a similar delay if you receive our broadcasts on a digital satellite receiver in your home.
Analogue signals are not usually delayed in the same way, so if you are setting your clock from the 'pips', you should use an analogue broadcast if you are concerned about accuracy to the second.

When watching Freeview, I've noticed that the sound and pictures appear to drift out of sync
The BBC does take great care in ensuring that the transmitter sound and vision synchronisation is correct, but on rare occasions we can get it wrong. Having said this, often the problem with the sound and vision synchronisation is due to the design of the receiver itself (either an iDTV or a set top box). As digital television has error correction, there is often a need for a receiver to re-synchronise the sound and vision at the output stage. To enable this to be done, the broadcaster transmits a changing number that links the two. Unfortunately some receivers not to use the full number and this can lead to a synchronisation problem. Changing the channel to one from a different broadcaster and back can often fix this problem.