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Inspector Sands11,444 posts since 25 Aug 2004

Depends on the broadcaster. Sky uplink their own services, and those of others from at least one location (which they inherited, or the use of, as part of the BSB merger I think - though I may be wrong)

Yes they have their uplinks there at Chilworth in Hampshire, the teleport the IBA built for BSB, although much expanded. They also playout some of their channels from there and it was home of Sky Box Office


The other IBA site down that way at Crawley Court is one of Arqiva's major teleports. Presumably there's some uplinks from there some third party downlinks too, I know of one broadcaster that rents some dishes and remote controls them from their studios in London

Quote:

The BBC uplink their own services, mainly, though they may also use third party uplinks for some services.

Yes, it uplinks its domestic services but not international ones presumably because that needs uplink sites around the world, it can't all be done from the UK
Markymark5,038 posts since 13 Dec 2004
Meridian (North) South Today
Sky uplink from Isleworth (Sky HQ) and Chilworth, near Southampton.


Yes, and also another site not that far from Chilworth, not sure how common knowledge it's location is, it's used to deal with any rain fade that might occur ( during a localised thunderstorm) at Chilworth.

Arqiva's main site ( as mentioned) is at Crawley Court, with another a couple of miles east of Winchester. Hampshire's quite a hotbed for uplinks !
noggin12,683 posts since 26 Jun 2001
I'm not sure if this would be the right thread but where are the Freesat channels uplinked? Are they uplinked together in one location or are essentially the broadcasters responsibility.

The transmissions for Freesat and Sky are the same, however there is a bit of a fudge in the metadata of each multiplex that has channels on for Freesat so they don't have to broadcast duplicates.

As for the uplinks, Sky and the BBC do their own and companies like Arqiva and Globecast uplink for other broadcasters


Yes - broadcasters on the Sky and Freesat platforms don't need to uplink two separate services - they can uplink a single service which can be received by receivers on either platform. When Freesat launched it differed from Sky in some regards (Sky use WST Teletext subtitles, Freesat - like Freeview - use DVB bitmapped subtitles), and had to ensure its EPG didn't 'interfere' with Sky's.

As a result FTA services that are on both platforms have to carry both WST and DVB Sub subtitles, both Sky and Freesat EPG data, and in some cases both Sky and Freesat interactive / digital text services.
Rkolsen1,565 posts since 20 Jan 2014
BBC World
I edited this thread to included bonded units. I came across the BBCNewsGOps twitter feed. They were running a seminar for MoJos and showed the kits they were using for iPhones. It appears they're using a software called WMT according to this quick setup card. Is WMT made by the BBC or another company? I never heard of it.


noggin12,683 posts since 26 Jun 2001
I edited this thread to included bonded units. I came across the BBCNewsGOps twitter feed. They were running a seminar for MoJos and showed the kits they were using for iPhones. It appears they're using a software called WMT according to this quick setup card. Is WMT made by the BBC or another company? I never heard of it.




WMT is a product family from Mobile Viewpoint. It's a rival to LiveU - and is in widespread use at the BBC. It's available as both a full 8-SIM+Wifi bonded backpack field-hardware + base-server solution, but it can also be deployed as a sofware product on iPhones etc. for the field part. The bonding on an iPhone is usually implemented by using a MiFi 3G/4G WiFi hotspot on one network, and a SIM in the phone on a second network I believe, or by using the internal Data SIM and a third-party WiFi connection.

https://www.mobileviewpoint.com

WMT is deployed for live video for TV (it handles IFB).
Luci Live is used for radio (Though rather than bond for Luci Live - I believe the approach these days is to just send the same audio streams over both WiFi and 3G/4G connections)

WMTs and LiveUs are increasingly being used for non-News live links - sometimes in combination with VSat IP connectivity rather than DVB SNG. If you have a good signal or very good WiFi/Cabled network connectivity you can dial down the delay and reduce the latency to less than you might have on a typical low-ish bitrate SNG set-up.
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UKnews, Tifatifa and Rkolsen gave kudos