[89700] in North American Network Operators' Group
Re: AT&T: 15 Mbps Internet connections "irrelevant"
daemon@ATHENA.MIT.EDU (Marshall Eubanks)
Sat Apr 1 16:09:55 2006
In-Reply-To: <20060401205439.GJ7083@virtual.bogons.net>
Cc: Frank Bulk <frnkblk@iname.com>, nanog@nanog.org
From: Marshall Eubanks <tme@multicasttech.com>
Date: Sat, 1 Apr 2006 16:09:46 -0500
To: Simon Lockhart <simon@slimey.org>
Errors-To: owner-nanog@merit.edu
Hello;
On Apr 1, 2006, at 3:54 PM, Simon Lockhart wrote:
>
> On Sat Apr 01, 2006 at 01:26:51PM -0600, Frank Bulk wrote:
>> The majority of U.S.-based IP TV deployments are not using MPEG-4
>
> Agreed. However, I'd say that any IPTV provider currently using
> MPEG2 would
> be planning a migration to MPEG4/H.264 - half the bandwidth means
> double the
> channels.
>
Also, I think that the majority of IP TV deployments right now are
not in the US.
>> in fact,
>> you would be hard-pressed to find an MPEG-4 capable STB working with
>> middleware.
>
> I disagree. There are several MPEG4 capable STB available now, and
> they all
> have support of middleware vendors.
In the last IPTV trade show I went to (TVoDSL in Paris in January), I
don't recall a single
MPEG STB or IPTV system vendor who wasn't either showing or promising
H.264 support.
>
>> SD MPEG-2 runs around ~4 Mbps today and HD MPEG-2 is ~19 Mbps.
>> With ADSL2+
>> you can get up to 24 Mbps per home on very short loops, but if you
>> look at
>> the loop length/rate graphs, you'll see that even with VDSL2 only
>> the very
>> short loops will have sufficient capacity for multiple HD
>> streams. FTTP/H
>> is inevitable.
>
> Anyone looking to do HD will be looking at H.264, and looking to
> bring the
> bandwidth requirement down to 8-10Mbps. That is certainly more
> practical with
> ADSL2+ deployments (unless you want more than one STB per DSL).
Which you would in the US, but maybe not everywhere (yet).
>
> Simon
> (Currently working on an H.264 IPTV deployment)
> --
Regards
Marshall
> Simon Lockhart | * Sun Server Colocation * ADSL * Domain
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