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BT Preparing Broadband TV

:D :D :D What??? on a 1gb / month cap

Or maybe that is why BT is looking at capping it's ADSL PC users cos it wants the bandwidth for itself ?
 
i think 1gb wont take very long till its used with broadband tv.

will just have to wait and see what happens, should be fun !
 
I think you people may be getting confused. BT could allocate a seperate Virtual Channel for TV which would mean that its point to point in essence. It WILL NOT BE ROUTED OVER THE INTERNET. Routing that much traffic across the Internet would be a mean feat. Using a seperare VCI would solve alot of issues: but would mean that BT BROADBAND TV would be restrictive because it would not provide Internet integration.
 
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TDCOM said:
I think you people may be getting confused. BT could allocate a seperate Virtual Channel for TV which would mean that its point to point in essence. It WILL NOT BE ROUTED OVER THE INTERNET. Routing that much traffic across the Internet would be a mean feat. Using a seperare VCI would solve alot of issues: but would mean that BT BROADBAND TV would be restrictive because it would not provide Internet integration.

Yep, I know, I just couldn't resist it given all the constraits BT seem to be putting existing broadband consumers under. I know they are trying to get the price down but wasn't broadband always supposed to 'free the shackles of dialup '. Before you know it some of us will be clock watching again when we use our BB connection when BT introduce PAYG.

Maybe I am just being ignorant to the number of people out there who just can't afford to pay £25 or so a month for an uncapped service?, If that is the case then I am sorry (and I realise some people don't need more than a gig a month), but when you hear that Norway, Sweden and Denmark all have 8mb connections available for what we pay for our 1mb it does make you think what BT are playing at. :shrug:
 
Erwlas said:
but when you hear that Norway, Sweden and Denmark all have 8mb connections available for what we pay for our 1mb it does make you think what BT are playing at. :shrug:


What people fail to realise is that 8Mb connections do NOT perform at 8 Mbps because most Web Servers are throttled. I know for a fact that most Web Hosts throttle each website to 500Kbps to retain service levels. Also, broadband networks running at 8Mbps is seriously pushing the threshold. I honestly think that speeds in excess of 3 Mbps are just not needed YET. I am working for a company developing a high - speed switch which we hope will replace most ATM circuits at the core of the Internet.
 
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Erwlas said:
:D :D :D What??? on a 1gb / month cap

Or maybe that is why BT is looking at capping it's ADSL PC users cos it wants the bandwidth for itself ?

Given the typical ADSL connection is only 512Kbs & very few have 1Mbs or 2Mbs its not that practical. You really need something like 8Kbs to get a reasonable real time TV. You could do it on 1Mbs if you don't mind a postcard size picture & a blocky one at that.
 
Bob2002 said:
Because they have well developed fibreoptic networks. :hrmph:

Yes.

But think about it this way. You have a 100MB/10 BASE T switch connecting your network to an Internet router running at 1Mbps. Now tell me, what speed you would get downloading from an Internet site. 1Mbps obviously. Even though the hardware can ALLOW 100Mbits, the actual constrains of the WAN stop you from reaching your peak.
 
TDCOM said:
What people fail to realise is that 8Mb connections do NOT perform at 8 Mbps because most Web Servers are throttled. I know for a fact that most Web Hosts throttle each website to 500Kbps to retain service levels. Also, broadband networks running at 8Mbps is seriously pushing the threshold. I honestly think that speeds in excess of 3 Mbps are just not needed YET. I am working for a company developing a high - speed switch which we hope will replace most ATM circuits at the core of the Internet.

We're not talking about web servers though. We're talking about video on demand, which is a totally separate application. It will require a change in philosophy of how the storage servers are designed.

We already have a number of networks in this country delivering multiples of 10gbps to POPs. Its just BT have their archaic network, which delivers 155mbps to telephone exchanges for adsl (34mbps to subtended exchanges), with a potential option to upgrade to 622mbps. NTL already deliver 2gbps to every UBR on the network, each covering a similar area to one or two BT exchanges.

And do you really believe that ATM is used on the core of the internet?! I doubt you'd find it anywhere near telehouse, except where BT are involved in supplying lines. Everyone else uses ethernet or DWDM, as do their own networks.

VoD requires at least 4mbps to attain a picture quality equivalent to digital TV. With HDTV on the way, this will require well over 10mbps per stream. Now, 2 people in the house watching more than one stream, you need more speed. Don't insult your own intelligence by pretending that higher speeds cannot be delivered are aren't needed/wanted. Fact of the matter is, we are very quickly falling behind other countries, who already have 10mbps for what we are paying for 512kbps...
 
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ProfPete said:
And do you really believe that ATM is used on the core of the internet?! I doubt you'd find it anywhere near telehouse, except where BT are involved in supplying lines. Everyone else uses ethernet or DWDM, as do their own networks.

VoD requires at least 4mbps to attain a picture quality equivalent to digital TV. With HDTV on the way, this will require well over 10mbps per stream. Now, 2 people in the house watching more than one stream, you need more speed. Don't insult your own intelligence by pretending that higher speeds cannot be delivered are aren't needed/wanted. Fact of the matter is, we are very quickly falling behind other countries, who already have 10mbps for what we are paying for 512kbps...
Can I first say that teh CORE of the Internet DOES run on ATM. The conenctions between and American IPX's and U.K RUNS on ATM. It always has and probably will do.


I also disagree with your 4Mbps claim. With modern compression techniques (Divx anyone) DVB quality video can be transmit at 2 Mbps providing astonishignly clear picture.. Also don't insult my intelligence as HDTV would use UDP datagram and not TCP, because it is 'real-time' so all a set-top box would do is 'catch' the signal. As we know, Datagram is connectionless, but by using a Connection-orientated service like I.P with a connectionless protocol like Datagram, then it is totally feasiable(just like Satellite DVB uses I.P in the same way). I personally think that a 2Mbps conenction to a household COULD provide dozens of high quality channels.
 
Last edited:
ProfPete said:
... VoD requires at least 4mbps to attain a picture quality equivalent to digital TV. With HDTV on the way, this will require well over 10mbps per stream. ...

I`m not sure this will be the case in the future with H.264 being implemented -

... Not only is H.264/AVC very efficient, providing extremely high quality in smaller files, but H.264/AVC is also scalable, producing video for everything from 3G for mobile phones to High Definition (HD). H.264/AVC can create great-looking 3G mobile content at 50-160 Kbps, excellent Standard Definition (SD) video at 800-1500 Kbps, beautiful HD video (1280x720, 24p) at 5-7 Mbps and full HD video (1920x1080, 24p) at 7-9 Mbps. So at today’s SD DVD data rates, H.264/AVC can deliver full HD. In fact, H.264/AVC was ratified by the DVD Forum for inclusion in the next-generation HD DVD format.

:hrmph:
 
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