noggin's posts, page 147

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NG
noggin Founding member

Channel Television

Markymark posted:
noggin posted:
Markymark posted:

I'll seek clarification from someone that will definitely know chapter and verse, but I'm sure there are gigs and gigs and gigs of fibre bandwidth to and from the CIs now (think of all the banks there !)


Yes - and to think the original DSat opt-chain for BBC One Channel Islands used bonded ADSL over multiple phone lines to get 8Mbs from Jersey to Plymouth... (Presumably still carried over fibre - but the cheapest route to do so?)


I did a speed test on my 4G phone recently, and got 96 Mb/s (just saying ! Not suggesting that's an option BTW !)


If you stand near an InlinkUK advertising/phone 'thing' you can get 300Mbs via WiFi without breaking a sweat (each one has a Gigabit BT fibre connection)
NG
noggin Founding member

WOS Wrestling Ratings

cityprod posted:
Jon posted:
cityprod posted:

That still makes it the most popular wrestling programme in the UK, by more than 100%. That's not too shabby.

And how many Wrestling programmes are on one of the major free to air channels?


Does such a concept of “major” free to air channels actually exist outside of the broadcasting bubble?


In ratings terms - absolutely the concept continues to exist.

Last ratings from BARB - weekly share of all viewing https://www.barb.co.uk/viewing-data/weekly-viewing-summary/ :

BBC One 19.76%
BBC Two 5.65%
ITV SD +1 and HD added 13.76%
C4 and C4+1 5.6%
C5 4.5%

This means the 5 main terrestrials account for pretty much 50% of all UK TV viewing across the week. They are still dominant players. Compare the BBC One and ITV shares in double figures with the next highest rated non-Big 5 channel - ITV3...

The next highest share of any other channel were the terrestrial operated, universally (or nearly) available ITV3 2.23%, ITV2 1.72% and Cbeebies 1.44%.

The most popular non-'terrestrial operated' service was next, and was Drama at 1.35%, beating E4 at 1.33%

Quote:

From my experience, the answer seems to be a very definite no. For viewers in general, there doesn’t seem to be any significant difference in stature between the channels. It’s just a case of does it have programmes that I want to watch.


Yes - but it's clear BBC One and ITV have more programmes that more people want to watch. The big 5 terrestrials are still the 5 most watched channels in the UK.
NG
noggin Founding member

Channel Television

Markymark posted:
Steve in Pudsey posted:
Yes, my suggestion was that the HD mux *only* might be generated locally using satback, given the BBC's history of not using the fibre to feed the analogue channels using it back in the day, implying it might be cost prohibitive.

The other muxes are CI specific so would be handled in a more conventional way.


I'll seek clarification from someone that will definitely know chapter and verse, but I'm sure there are gigs and gigs and gigs of fibre bandwidth to and from the CIs now (think of all the banks there !)


Yes - and to think the original DSat opt-chain for BBC One Channel Islands used bonded ADSL over multiple phone lines to get 8Mbs from Jersey to Plymouth... (Presumably still carried over fibre - but the cheapest route to do so?)
NG
noggin Founding member

Channel Television

Steve in Pudsey posted:
Yes, my suggestion was that the HD mux *only* might be generated locally using satback, given the BBC's history of not using the fibre to feed the analogue channels using it back in the day, implying it might be cost prohibitive.

The other muxes are CI specific so would be handled in a more conventional way.


Yes - though BBC One and BBC Two analogue were distributed at 140Mbs each over fibre - so 280Mbs of capacity would have been needed to feed them both.

In comparison less than a quarter of that, less than 70Mbs, would carry both PSB1 (all BBC SD services) and PSB3 (the main HD services) - and fibre costs have dropped significantly in the last 30 years.
NG
noggin Founding member

Channel Television

Markymark posted:
noggin posted:
I think the point was being made that if PSB3 was derived from this satellite backup source, it would be an option to remove ITV HD (or not include it) rather than broadcast the 'wrong' ITV HD.


You could still achieve that, because the SI tables in a back up situation are generated at the individual Tx sites, and it would just be a case of 'not pointing' to the ITV HD stream (just as you wouln't point at BBC 1 HD Scotland etc) ?


I think we're at crossed purposes.

The suggestion was that if the CI TX sites were fed by Satback they couldn't get an ITV HD feed with CI adverts in it, so would blank it. This was used as a reason to suggest the CI TX sites weren't fibre fed. (Assumption being that fibre fed TXes could have a specific ITV HD feed)

However another suggestion was that generating an ITV HD Channel Islands feed at RedBee wasn't cost effective, and/or coding and muxing it to create a CI PSB3 mux wasn't, even if the transmitters are fed fibre.
Last edited by noggin on 6 September 2018 9:26am
NG
noggin Founding member

Channel Television

Markymark posted:
Steve in Pudsey posted:
Inspector Sands posted:
Possibly, but then why would the HD Mux be supplied that way when the other BBC Mux isn't?


Because the other BBC mix requires BBC One CI which isn't on the satellite.

On the mainland that mux contains a different version of ITV HD in each region and I think different BBC One HD in the nations, services which are not carried on the satellite backup.

Fair point that it's not a lot of data, I don't know how much capacity the fibre has and whether it's cost effective to use it.


PSB 3's transport streams (for all the regions) are assembled centrally at the BBC's CCMs on the mainland.
It makes absolutely no difference to the bandwidth required whether or not ITV or any other service
is absent from that version of the mux, because you still have to 'pad out' the TS with null packets to replace them.

I don't follow your logic regarding D-Sat back up ?


It's probably that the Satellite backup service (not Sky DSat but the PSB 1 and 3 backups on Intelsat 907 that feed main transmitters as a backup for the redundant fibres) only carries one ITV HD variation, STV HD and UTV HD (If that's still the case post UTV becoming part of ITV plc)

https://en.kingofsat.net/tp.php?tp=1524 (Pretty out of date as BBC HD was replaced by BBC Two HD a while back, and I expect that transponder now contains CBBC HD too.)

This is OK for backup purposes in England but I doubt ITV Channel's advertisers would want PSB3 ITV HD permanently to carry no commercials sold to the Channel Islands communities (plus there may be legal issues with that ITV HD region going out in the Channel Islands - ISTR advertising compliance issues in the old days of TVS?) I think the point was being made that if PSB3 was derived from this satellite backup source, it would be an option to remove ITV HD (or not include it) rather than broadcast the 'wrong' ITV HD.
Last edited by noggin on 6 September 2018 8:42am
NG
noggin Founding member

WOS Wrestling Ratings

cityprod posted:

I'm a little suprised that they are moving it from Saturdays, wondering if they're trying to avoid scheduling it against WOS Wrestling, which seems to doing rather well in the 5pm slot right now.


I doubt it. WOS Wrestling got 400k last Saturday. That's lower than any show on BBC One on Saturday, other than a film that started at gone midnight. It got beaten by Escape to the Country on BBC Two...
Steve Williams, London Lite and DE88 gave kudos
NG
noggin Founding member

Best practice video capturing from VHS

harshy posted:
Well in this case the source is 544x576 4:3 interlaced so the result I ideally need is 720x576 4:3 interlaced Smile


OK - if you're going for DVD, or a playback solution that can cope with non-square pixels then yes.

If you're going for PC/Mobile/Tablet then 768x576 square pixel 4:3 might be a better bet? (Or 788x576 if you are starting with a 720 source that has been scaled to 544 uncropped and is thus a little bit wider than the 702x576 4:3 area)

But then if you are going for PC/Mobile/Tablet you are probably better deinterlacing to 50p or 25p too - as many of these devices won't guarantee a decent deinterlace.
NG
noggin Founding member

Eleven Sports

rdd posted:
Could it not be done similar to how eir (and I presume BT) authorise their Broadband customers to access their channels? For eir Broadband customers they can log into their My eir and enter their Sky viewing card numbers and they will authorise them. I presume it’s similar for BT Broadband customers.


I'm guessing there is a payment that the platform operator (Sky) to provide this service that BT/Eir sport cover. I wonder if Elevent Sports are now having to negotiate this with Virgin and Sky at the moment?
NG
noggin Founding member

Changes to BBC Parliament & Political Programming

Spencer For Hire posted:

The On The Record titles and theme were brilliant - wry and non-conformist but with authority and gravitas.


The original Croc titles were designed, I believe, by Tim Goodchild, who went on to be BBC Science's in-house graphic designer for a period, and has done some pretty high-end work on series like 'Walking with Cavemen'

I think there was a later version that was designed by BBC News Graphics.
NG
noggin Founding member

Best practice video capturing from VHS

harshy posted:
So if I have 544x576 interlaced clip, do I do a w3fdif interlace whilst scaling it to 720x576 with the right aspect ratio set and then do a interlace on the deinterlaced file do I have to also to put it back to 25fps when reinterlacing?


There should be no need to deinterlace and reinterlace in this scenario as you aren't doing any vertical scaling, just horizontal.

However you will probably need to persuade ffmpeg to keep the output interlaced. if you use -vcodec libx264 -flags +ildct+ilme that should keep things interlaced.

The only reason to deinterlace is if you are doing a vertical scale. (You can scale in the field rather than frame domain with interlaced content using an interlace aware scale but the quality can be reduced if you do)

However do you want to rescale 544x576 to 720x576 or do you want a square pixel result?
Last edited by noggin on 5 September 2018 11:26pm
NG
noggin Founding member

TV Breakdown Appreciation Thread

Steve in Pudsey posted:
Sorry yes, I was referring to the BRT TV2 card, which I suspect was a switch at the receiver end rather than as transmitted.


Who knows. The audio being there suggests it might not be a weak signal being picked up in the absence of the BBC signal, as UK and Continental Europe used different frequencies for their audio subcarriers? (When we used to pick up Dutch and Belgian TV on the south coast it was always mute because of this)