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Inspector Sands12,182 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
Markymark5,490 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 !
noggin13,320 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.
Rkolsen2,013 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.


noggin13,320 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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noggin13,320 posts since 26 Jun 2001
Since this thread discusses satellites (and I think was discussed in this thread) I found a variation of the RX8200 receiver by Ericsson of that’s designed for receiving Sky services specifically for broadcast applications. It takes a single access card and outputs an HD-SDI with 4:2:0 decoding.

https://mediasolutions.ericsson.com/cms/wp-content/uploads/2017/08/RX8200-Datasheet-SkyUK.pdf


Yep - though there are lots of domestic Sky boxes with HDMI->HD-SDI Converters hanging off the back of them. (At one point you could get HDMI->HD-SDI converters with optional HDCP removal, which was enabled if you assumed the responsibility for any legal issues that might cause). (Some also have IR blasters on them to ensure they are on the right channel prior to recording)
Orry Verducci1,566 posts since 1 Feb 2005
Anglia (West) Look East
As noggin has said I've seen the technical facilities at a number of broadcasters, and generally speaking they use a standard Sky+HD box with HDMI to HD-SDI converters instead of a professional IRD.

For monitoring it's often considered better to use a standard Sky box as that way you can be sure that your broadcasts are fully working with the Sky hardware and EPG, particularly if you're also monitoring subtitles and interactive prompts.

Sky boxes are also used a lot in news gathering operations for recording footage from Sky and BT Sports for use in sport packages. Due to the enhanced anti-piracy measures rolled out in recent years, especially on the HD channels, Sky now only allow you watch those channels on the individual Sky box the viewing card is paired to. I don't think a professional IRD would be authorised by Sky for this, as part of the measures is the ability to overlay source icons and unique viewer ID's on the picture at certain times, which require the Sky EPG software to function.
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