[89697] in North American Network Operators' Group
Re: AT&T: 15 Mbps Internet connections "irrelevant"
daemon@ATHENA.MIT.EDU (Simon Lockhart)
Sat Apr 1 15:55:08 2006
Date: Sat, 1 Apr 2006 21:54:39 +0100
From: Simon Lockhart <simon@slimey.org>
To: Frank Bulk <frnkblk@iname.com>
Cc: nanog@nanog.org
In-Reply-To: <002901c655c2$3a6b1330$6805000a@family>
Errors-To: owner-nanog@merit.edu
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.
> 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.
> 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).
Simon
(Currently working on an H.264 IPTV deployment)
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