NG
Almost certainly. If a studio is sent via a fibre or similar resilient, IP (ideally not internet) route, particularly if very lightly compressed, or uncompressed, the delay can be just a few frames (a frame is 40ms).
If you need to use DVB or VSAT satellite (which has speed of light delay), low bitrate codecs (which introduce codec delay) or mitigate packet loss (by buffering which introduces delay) then you get much more delay...
noggin
Founding member
I noticed today's DTL with Nigel Farage appeared to have absolutely no audio delay, allowing the debate to flow much better. Is this just because Nigel was in a Westminster facility I wonder.
Almost certainly. If a studio is sent via a fibre or similar resilient, IP (ideally not internet) route, particularly if very lightly compressed, or uncompressed, the delay can be just a few frames (a frame is 40ms).
If you need to use DVB or VSAT satellite (which has speed of light delay), low bitrate codecs (which introduce codec delay) or mitigate packet loss (by buffering which introduces delay) then you get much more delay...
TV
Almost certainly. If a studio is sent via a fibre or similar resilient, IP (ideally not internet) route, particularly if very lightly compressed, or uncompressed, the delay can be just a few frames (a frame is 40ms).
If you need to use DVB or VSAT satellite (which has speed of light delay), low bitrate codecs (which introduce codec delay) or mitigate packet loss (by buffering which introduces delay) then you get much more delay...
The ITV internal video distribution and data network called XNET is very low latency, a frame at the most. I didn't see it but the DTL was probably from the ITV/ITN/Channel 4 shared facility in 4 Millbank which is connected to XNET. Reverse comms would have been done over POTS or ISDN which (depending on ISDN codec used) improves overall latency further.
I noticed today's DTL with Nigel Farage appeared to have absolutely no audio delay, allowing the debate to flow much better. Is this just because Nigel was in a Westminster facility I wonder.
Almost certainly. If a studio is sent via a fibre or similar resilient, IP (ideally not internet) route, particularly if very lightly compressed, or uncompressed, the delay can be just a few frames (a frame is 40ms).
If you need to use DVB or VSAT satellite (which has speed of light delay), low bitrate codecs (which introduce codec delay) or mitigate packet loss (by buffering which introduces delay) then you get much more delay...
The ITV internal video distribution and data network called XNET is very low latency, a frame at the most. I didn't see it but the DTL was probably from the ITV/ITN/Channel 4 shared facility in 4 Millbank which is connected to XNET. Reverse comms would have been done over POTS or ISDN which (depending on ISDN codec used) improves overall latency further.
JM
JamesM0984
Please bring this thread back on topic: comment on Charlotte Hawkins sitting on the right with a slightly different voiceover or speculate on yet more tweaks and revamps in January/March/September.
In-depth coverage will begin during half term.
RK
Proves to never criticize the people that make you look good. Be kind to hair, make/up, camera crew, stage hands (you may get food that was spit in) and gallery staff who can change your voice, cut your mic and take you off air.
No one has mentioned that this morning while Piers was ranting about the lack of professionalism in the gallery, they took him off air.
Proves to never criticize the people that make you look good. Be kind to hair, make/up, camera crew, stage hands (you may get food that was spit in) and gallery staff who can change your voice, cut your mic and take you off air.
IT
itsrobert
Founding member
I got the impression it was very much tongue-in-cheek though. Piers was ranting (jokingly) about the gallery wanting him to read something and they momentarily went to black with audio intact. They then brought the picture back and moved the camera shot over to Charlotte to cut Piers out, before returning to both Piers and Susanna. It was definitely the gallery having a bit of fun rather than them seriously taking him off air.
TV
Where have you seen this?
Just seen that Dominic Green (GMB voiceover) is leaving ITV. He recently said he’d recorded VO up until Easter, so I suppose that means we’ll have a new voiceover artist for GMB in the next few months. I hope the 2015 voiceover doesn’t come back.
Where have you seen this?