Had BBC Breakfast on this morning when I noticed that my daughters tv was about 2 secs ahead of mine:confused: Both on Freeview, mine is a 42" Panasonic plasma about 4 year old, and hers is 1 year old Samsung 20" Lcd. Not really a problem just wondered if anyone knew why? Pany's use slower lectric:O

I have one freeview box set up to Southern and another freeview box set to London both they are about 1 - 2 seconds different, if you have anolgue TV on that is another 1 - 2 seconds different again.

Sky is normally about 1-2 secs behind the analogue signal. I believe the lag is down to signal decoding and processing by the box/tv. Therefore it should depend on the quality of the tuner/decoder in the box/tv. So maybe not surprising that a newer tv has less lag as, in theory, it should have a fancier faster tuner.

next doors is about 1-2 seconds behind us, great when eastenders starts and finishes and it echos

Sky and freeview are both behind analogue IME

The frames per second is fixed in the MPEG standard used by freeview, so the decoding has to be at a minimum speed. The only thing I can think of that would change the time is that one of the boxes buffers more into RAM so that it won't run out of data to process and so is slower to start playing the data back by a very small amount of time.

Sky and freeview are both behind analogue IME

The frames per second is fixed in the MPEG standard used by freeview, so the decoding has to be at a minimum speed. The only thing I can think of that would change the time is that one of the boxes buffers more into RAM so that it won't run out of data to process and so is slower to start playing the data back by a very small amount of time.

That sounds highly plausible. As I said its not a problem just curiosity:thumbup:

Sky and freeview are both behind analogue IME

The frames per second is fixed in the MPEG standard used by freeview, so the decoding has to be at a minimum speed. The only thing I can think of that would change the time is that one of the boxes buffers more into RAM so that it won't run out of data to process and so is slower to start playing the data back by a very small amount of time.

I'd imagine there will be a slight delay (and buffer) at the encoding end too, which won't explain the difference between 2 boxes, but will explain the lag behind analogue.

Analogue Sky is behind because of the time delay sending the signal to the geostat sats and getting it back. Digital adds en / decoding delay too. Decoding speed is dependant on electronics. Cheaper / older will be slower for the reasons CM mentions above.