IS
It looked as if the "TV" in Derren's studio was being fed BBC One analogue (it didn't quite look the right shape) - which is not delayed by digital encoding and decoding and will thus be "ahead" of all digital outlets.
If the split screen is between BBC One Digital and More 4 - then the route taken by the BBC one image to get to your home via both routes is likely to have had similar delays. (The delay introduced by routing BBC One analogue via a display Riverside and back to C4/Red Bee is likely to be only the order of around five or so frames I'd expect - as uncompressed or low latency compressed fibre links will be used to get the studio to the playout area)
Ahhh, I'd forgotten about analogue (as sad as that sounds), that would make sense. I assume they they chose that as a source so to avoid any extra delay, unless they were lucky enough to be able to get across the line from 'Lottery HQ'
Still, I'm surprised how exactly it was on that video, especially considering the route that the BBC1 via More 4 image would have taken including 2trips through Red Bee
Thanks to the Broken TV blog, here's More4 and BBC1 in split screen as they went out: http://www.youtube.com/watch?v=lmxua_V1AcM
I'd have thought that there'd be a slight delay on Derren's TV screen due to it coming off air and then being re-broadcast, but it's absolutely spot on
I'd have thought that there'd be a slight delay on Derren's TV screen due to it coming off air and then being re-broadcast, but it's absolutely spot on
It looked as if the "TV" in Derren's studio was being fed BBC One analogue (it didn't quite look the right shape) - which is not delayed by digital encoding and decoding and will thus be "ahead" of all digital outlets.
If the split screen is between BBC One Digital and More 4 - then the route taken by the BBC one image to get to your home via both routes is likely to have had similar delays. (The delay introduced by routing BBC One analogue via a display Riverside and back to C4/Red Bee is likely to be only the order of around five or so frames I'd expect - as uncompressed or low latency compressed fibre links will be used to get the studio to the playout area)
Ahhh, I'd forgotten about analogue (as sad as that sounds), that would make sense. I assume they they chose that as a source so to avoid any extra delay, unless they were lucky enough to be able to get across the line from 'Lottery HQ'
Still, I'm surprised how exactly it was on that video, especially considering the route that the BBC1 via More 4 image would have taken including 2trips through Red Bee
