All posts by Briantist
Below are all of Briantist's postings, with the most recent are at the bottom of the page.
trevorjharris: The reason that the public service channels can't use the "HD replace" service on Sky is that they all have regional variations.
Channels 4 and 5 has them for adverts (five each) Spot Advertising Macro Map | Channel 5 and Macro Map | Interactive Map of Our Regions with Data .
ITV1 has the "contracts rights renewal" scheme, as well as local adverts and regional news.
BBC One has nations and regions and BBC TWO has nations - Which BBC regions are on satellite? | ukfree.tv - 10 years of independent, free digital TV advice .
This prevents them from allowing the swapping out of these services for a incomplete HD service.
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trevorjharris: The reason that other channels on Sky *CAN* swap out their SD service for the HD one on the same channel number is that they are UK-wide services.
Sky Sports 1, Sky Sports 2, Sky Sports 3, Sky Sports News, Sky News etc have no local or regional content, as you would expect from a satellite broadcaster.
Which is why it would make a LOT of sense to stick BBC THREE HD and BBC FOUR HD (and BBC News from next year when they move to Broadcasting House) on satellite, just to get the number of BBC HD viewers up!
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trevorjharris: You also can't future-proof when there is a new technlology in beta, which this time is HEVC - High Efficiency Video Coding - Wikipedia, the free encyclopedia .
Sky *have* some testing Sky tests 4K at The Emirates | News | Broadcast
"The broadcaster conducted its first significant 4K test using cameras from Sony and Canon at The Emirates during Arsenals Champions League tie with Olympiakos last week.
Sky director of operations Darren Long said: Were constantly working with manufacturers to test new products so that we have a good understanding of their capabilities once they become available.
Its too early for us to talk about whether or not 4K may form part of our future roadmap, but we are keen to learn more about its potential ahead of next-generation TV sets coming to market.
One implication for broadcasters would be the need to build and supply set-top boxes that are capable of receiving the compression scheme HEVC (Higher Efficiency Video Codec), which makes ultra-high-definition possible.
The Emirates tests paired two Sony F65 cameras in a picture stitching application alongside a Canon C500 4K camera.
Long said the pictures looked stunning but he wanted to see 4K (3,840 x 2,160 pixels) images captured at higher frame rates.
The key to us is to ensure quality and when showing footballers running, it was clear that there was too much camera blur; we feel 120 frames a second is the right speed. Were liaising with standards bodies and working with manufacturers to understand the cameras capabilities and to improve the technology.
The entire infrastructure for live production would also have to be upgraded to support 4K, and outside broadcasters are already gearing up for this.
Brian Clark, commercial and technical projects director at NEP Visions, which facilitates Premier League productions for Sky Sports, said: 4K is very much on our radar.
Manufacturers are moving 4K forward and we speak to companies to see how the timescales could be accelerated.
In the next three years, I believe there will be live multi-camera acquisition.
Other broadcasters expressing interest in the format include Brazils TV Globo, France Tlvisions and Sky Deutschland.
Meanwhile, the BBC and NHK conducted tests of live 8K (Super Hi-Vision) transmissions during the London 2012 Olympics."
See also New MPEG format paves the way for UHDTV The Register
"If I had a personal guess it would be that with HEVC the 8K system with good transparency might come down to about 90Mbit/s and the 4K system to about 25 Mbit/s, but this is just an opinion. Also please don't forget that compression technology improves in cycles, and there may be a further cycle - the successor to HEVC - before the end of the decade that we can use for 8K UHDTV."
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... also important is that concept of Scalable Video Coding - Wikipedia, the free encyclopedia !
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ian from notts: If it's DAB, then the transmitter is probably this one ... Quarndon (Derby, England) DAB transmitter | ukfree.tv - 10 years of independent, free digital TV advice .
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john richardson: If you want Sky Sports, you need a subscription service.
Freesat is free - meaning no subscriptions.
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Peter Nothard: I expect you are asking about the subtitles?
The subtitles are done for the BBC channels by Red Bee media, and I know they are done by having two people speak what they hear into a computer dictation system.
The outputs are used combined to provide the on-screen subtitles.
Sky presumably use a similar system.
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Monday 10 December 2012 1:49PM
ian from notts: This one I would have thought --- Stanton Moor (Derbyshire, England) analogue radio transmitter | ukfree.tv - 10 years of independent, free digital TV advice